1
|
Cowl VB, Comizzoli P, Appeltant R, Bolton RL, Browne RK, Holt WV, Penfold LM, Swegen A, Walker SL, Williams SA. Cloning for the Twenty-First Century and Its Place in Endangered Species Conservation. Annu Rev Anim Biosci 2024; 12:91-112. [PMID: 37988633 DOI: 10.1146/annurev-animal-071423-093523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
Cloning as it relates to the animal kingdom generally refers to the production of genetically identical individuals. Because cloning is increasingly the subject of renewed attention as a tool for rescuing endangered or extinct species, it seems timely to dissect the role of the numerous reproductive techniques encompassed by this term in animal species conservation. Although cloning is typically associated with somatic cell nuclear transfer, the recent advent of additional techniques that allow genome replication without genetic recombination demands that the use of induced pluripotent stem cells to generate gametes or embryos, as well as older methods such as embryo splitting, all be included in this discussion. Additionally, the phenomenon of natural cloning (e.g., a subset of fish, birds, invertebrates, and reptilian species that reproduce via parthenogenesis) must also be pointed out. Beyond the biology of these techniques are practical considerations and the ethics of using cloning and associated procedures in endangered or extinct species. All of these must be examined in concert to determine whether cloning has a place in species conservation. Therefore, we synthesize progress in cloning and associated techniques and dissect the practical and ethical aspects of these methods as they pertain to endangered species conservation.
Collapse
Affiliation(s)
- Veronica B Cowl
- North of England Zoological Society (Chester Zoo), Chester, United Kingdom;
- European Association of Zoos and Aquaria, Amsterdam, The Netherlands
| | - Pierre Comizzoli
- Smithsonian's National Zoo and Conservation Biology Institute, Washington, DC, USA;
| | - Ruth Appeltant
- Gamete Research Centre, Veterinary Physiology and Biochemistry, Department of Veterinary Sciences, University of Antwerp, Wilrijk, Belgium;
| | | | - Robert K Browne
- Sustainability America, Sarteneja, Corozal District, Belize;
| | - William V Holt
- Department of Oncology and Metabolism, The Medical School, University of Sheffield, Sheffield, United Kingdom;
| | - Linda M Penfold
- South East Zoo Alliance for Reproduction & Conservation, Yulee, Florida, USA;
| | - Aleona Swegen
- Priority Research Centre for Reproductive Science, University of Newcastle, Callaghan, New South Wales, Australia;
| | - Susan L Walker
- North of England Zoological Society (Chester Zoo), Chester, United Kingdom;
- Nature's SAFE, Whitchurch, Shropshire, United Kingdom;
| | - Suzannah A Williams
- Nature's SAFE, Whitchurch, Shropshire, United Kingdom;
- Nuffield Department of Women's and Reproductive Health, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom;
| |
Collapse
|
2
|
Biasetti P, Hildebrandt TB, Göritz F, Hermes R, Holtze S, Stejskal J, Galli C, Pollastri I, Muzzo A, Lekolool I, Ndereeh D, Omondi P, Kariuki L, Mijele D, Mutisya S, Ngulu S, de Mori B. Application of decision tools to ethical analysis in biodiversity conservation. CONSERVATION BIOLOGY : THE JOURNAL OF THE SOCIETY FOR CONSERVATION BIOLOGY 2023; 37:e14029. [PMID: 36317722 DOI: 10.1111/cobi.14029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Revised: 09/10/2022] [Accepted: 09/14/2022] [Indexed: 06/16/2023]
Abstract
Achieving ethically responsible decisions is crucial for the success of biodiversity conservation projects. We adapted the ethical matrix, decision tree, and Bateson's cube to assist in the ethical analysis of complex conservation scenarios by structuring these tools so that they can implement the different value dimensions (environmental, social, and animal welfare) involved in conservation ethics. We then applied them to a case study relative to the decision-making process regarding whether or not to continue collecting biomaterial on the oldest of the two remaining northern white rhinoceroses (Ceratotherium simum cottoni), a functionally extinct subspecies of the white rhinoceros. We used the ethical matrix to gather ethical pros and cons and as a starting point for a participatory approach to ethical decision-making. We used decision trees to compare the different options at stake on the basis of a set of ethical desiderata. We used Bateson's cube to establish a threshold of ethical acceptability and model the results of a simple survey. The application of these tools proved to be pivotal in structuring the decision-making process and in helping reach a shared, reasoned, and transparent decision on the best option from an ethical point of view among those available.
Collapse
Affiliation(s)
- Pierfrancesco Biasetti
- Department of Reproduction Management, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
- Ethics Laboratory for Veterinary Medicine, Conservation and Animal Welfare, Padua University, Padua, Italy
| | - Thomas B Hildebrandt
- Department of Reproduction Management, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
- Department of Veterinary Medicine, Freie Universität, Berlin, Germany
| | - Frank Göritz
- Department of Reproduction Management, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Robert Hermes
- Department of Reproduction Management, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Susanne Holtze
- Department of Reproduction Management, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Jan Stejskal
- ZOO Dvůr Králové, Králové nad Labem, Czech Republic
| | - Cesare Galli
- Avantea, Laboratory of Reproductive Technologies, Cremona, Italy
| | - Ilaria Pollastri
- Ethics Laboratory for Veterinary Medicine, Conservation and Animal Welfare, Padua University, Padua, Italy
- Department of Comparative Biomedicine and Food Science, University of Padua, Legnaro, Italy
| | - Alessia Muzzo
- Department of Comparative Biomedicine and Food Science, University of Padua, Legnaro, Italy
| | | | - David Ndereeh
- Wildlife Research and Training Institute, Karagita, Kenya
| | | | | | | | | | | | - Barbara de Mori
- Ethics Laboratory for Veterinary Medicine, Conservation and Animal Welfare, Padua University, Padua, Italy
- Department of Comparative Biomedicine and Food Science, University of Padua, Legnaro, Italy
| |
Collapse
|
3
|
Zwiefelhofer ML, Shury T, Zwiefelhofer EM, Singh J, Mastromonaco GF, Adams GP. Strategies for oocyte collection and in vitro embryo production in free-roaming bison herds. CONSERVATION PHYSIOLOGY 2022; 10:coac058. [PMID: 35966755 PMCID: PMC9368820 DOI: 10.1093/conphys/coac058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 06/19/2022] [Accepted: 07/26/2022] [Indexed: 06/15/2023]
Abstract
The study was conducted to test the feasibility of protocols for field collection of cumulus-oocyte complexes (COC) for in vitro embryo production (IVP) in wild bison. The study was done with captive wood bison during the anovulatory season. In Experiment 1, the efficiency of transvaginal ultrasound-guided COC collection was compared between bison restrained in a squeeze chute without sedation vs in lateral recumbency after chemical immobilization using a dart gun (n = 8/group). In Experiment 2, a 2 × 2 design was used to examine the effects of superstimulation treatment [single dose of equine chorionic gonodotrophin (eCG) vs multiple doses of follicle stimulating hormone (FSH)] and method of drug administration (manual injection vs field darting) on COC collection and IVP. In Experiment 1, no difference was detected between chute-restrained vs chemically immobilized groups in the time required to complete COC collections, the number of follicles aspirated (11.5 ± 1.9 vs 9.3 ± 1.8; P = 0.4) or the COC recovery rate [COC recovered/follicle aspirated; 58/92 (63%) vs 44/69 (64%); P = 0.9]. In Experiment 2, no differences were detected between superstimulation treatments (eCG vs FSH). The total number of follicles available for aspiration did not differ between manual injection and field darting (23.9 ± 2.7 vs 21.6 ± 1.9; P = 0.4). Compared with the random start unstimulated group, the embryo production rate was higher [18/132 (14%) vs 53/189 (28%); P = 0.04] after wave synchronization and superstimulation. Results suggest that COC collection is equally feasible in a recumbent position after chemical immobilization as those bison restrained in a standing position in a hydraulic chute. Ovarian superstimulation with a single-dose eCG protocol is as effective as a multiple-dose FSH protocol, and field darting is as effective as chute-side administration of superstimulation treatments. The strategies in the present study are ready to be incorporated into field collections in free-roaming bison herds.
Collapse
Affiliation(s)
- Miranda L Zwiefelhofer
- Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, Saskatchewan, S7N 5B4, Canada
| | - Todd Shury
- Department of Veterinary Pathology, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, Saskatchewan, S7N 5B4, Canada
- Parks Canada Agency, Government of Canada, 52 Campus Drive, Saskatoon, Saskatchewan, S7N 5B4, Canada
| | - Eric M Zwiefelhofer
- Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, Saskatchewan, S7N 5B4, Canada
| | - Jaswant Singh
- Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, Saskatchewan, S7N 5B4, Canada
| | - Gabriela F Mastromonaco
- Department of Reproductive Sciences, Toronto Zoo, 361A Old Finch Avenue, Toronto, Ontario, M1B 5K7, Canada
| | - Gregg P Adams
- Corresponding author: Veterinary Biomedical Sciences, 52 Campus Drive, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5B4, Canada. Primary: 306-966-7411; Fax: 306-966-7376.
| |
Collapse
|
4
|
Abegglen LM, Harrison TM, Moresco A, Fowles JS, Troan BV, Kiso WK, Schmitt D, Boddy AM, Schiffman JD. Of Elephants and Other Mammals: A Comparative Review of Reproductive Tumors and Potential Impact on Conservation. Animals (Basel) 2022; 12:2005. [PMID: 35953994 PMCID: PMC9367617 DOI: 10.3390/ani12152005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 07/13/2022] [Accepted: 07/29/2022] [Indexed: 11/18/2022] Open
Abstract
Reproductive tumors can impact conception, pregnancy, and birth in mammals. These impacts are well documented in humans, while data in other mammals are limited. An urgent need exists to understand the reproductive impact of these lesions in endangered species, because some endangered species have a documented high prevalence of reproductive tumors. This article documents that the prevalence of both benign and malignant neoplasia differs between African and Asian elephants, with Asian elephants more frequently diagnosed and negatively affected by both. The prevalence of these tumors across mammalian species is compared, and impact plus treatment options in human medicine are reviewed to inform decision making in elephants. Evidence suggests that reproductive tumors can negatively impact elephant conservation. Future studies that document reproductive outcomes, including the success of various treatment approaches in elephants with tumors will benefit conservation efforts.
Collapse
Affiliation(s)
- Lisa M. Abegglen
- Department of Pediatrics & Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112, USA
- Arizona Cancer Evolution Center, Arizona State University, Tempe, AZ 85281, USA
- Exotic Species Cancer Research Alliance, North Carolina State University College of Veterinary Medicine, Raleigh, NC 27607, USA
| | - Tara M. Harrison
- Arizona Cancer Evolution Center, Arizona State University, Tempe, AZ 85281, USA
- Exotic Species Cancer Research Alliance, North Carolina State University College of Veterinary Medicine, Raleigh, NC 27607, USA
- Department of Clinical Sciences, North Carolina State University College of Veterinary Medicine, Raleigh, NC 27607, USA
| | - Anneke Moresco
- Exotic Species Cancer Research Alliance, North Carolina State University College of Veterinary Medicine, Raleigh, NC 27607, USA
- Department of Clinical Sciences, North Carolina State University College of Veterinary Medicine, Raleigh, NC 27607, USA
- Reproductive Health Surveillance Program, Morrison, CO 80465, USA
| | - Jared S. Fowles
- Department of Pediatrics & Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112, USA
| | - Brigid V. Troan
- Exotic Species Cancer Research Alliance, North Carolina State University College of Veterinary Medicine, Raleigh, NC 27607, USA
- Department of Clinical Sciences, North Carolina State University College of Veterinary Medicine, Raleigh, NC 27607, USA
| | - Wendy K. Kiso
- White Oak Conservation Foundation, Yulee, FL 32097, USA
| | - Dennis Schmitt
- Department of Animal Science, William H. Darr College of Agriculture, Missouri State University, Springfield, MO 65809, USA
| | - Amy M. Boddy
- Arizona Cancer Evolution Center, Arizona State University, Tempe, AZ 85281, USA
- Exotic Species Cancer Research Alliance, North Carolina State University College of Veterinary Medicine, Raleigh, NC 27607, USA
- Department of Anthropology, University of California Santa Barbara, Santa Barbara, CA 93106, USA
| | - Joshua D. Schiffman
- Department of Pediatrics & Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112, USA
- Arizona Cancer Evolution Center, Arizona State University, Tempe, AZ 85281, USA
- Exotic Species Cancer Research Alliance, North Carolina State University College of Veterinary Medicine, Raleigh, NC 27607, USA
- Peel Therapeutics, Inc., Salt Lake City, UT 84108, USA
| |
Collapse
|
5
|
Biasetti P, Hildebrandt TB, Göritz F, Hermes R, Holtze S, Galli C, Lazzari G, Colleoni S, Pollastri I, Spiriti MM, Stejskal J, Seet S, Zwilling J, Ngulu S, Mutisya S, Kariuki L, Lokolool I, Omondo P, Ndeereh D, de Mori B. Ethical Analysis of the Application of Assisted Reproduction Technologies in Biodiversity Conservation and the Case of White Rhinoceros (Ceratotherium simum) Ovum Pick-Up Procedures. Front Vet Sci 2022; 9:831675. [PMID: 35591869 PMCID: PMC9113018 DOI: 10.3389/fvets.2022.831675] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 03/01/2022] [Indexed: 11/13/2022] Open
Abstract
Originally applied on domestic and lab animals, assisted reproduction technologies (ARTs) have also found application in conservation breeding programs, where they can make the genetic management of populations more efficient, and increase the number of individuals per generation. However, their application in wildlife conservation opens up new ethical scenarios that have not yet been fully explored. This study presents a frame for the ethical analysis of the application of ART procedures in conservation based on the Ethical Matrix (EM), and discusses a specific case study—ovum pick-up (OPU) procedures performed in the current conservation efforts for the northern white rhinoceros (Ceratotherium simum cottoni)—providing a template for the assessment of ART procedures in projects involving other endangered species.
Collapse
Affiliation(s)
- Pierfrancesco Biasetti
- Department of Reproduction Management, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
- Ethics Laboratory for Veterinary Medicine, Conservation, and Animal Welfare, University of Padua, Padua, Italy
- *Correspondence: Pierfrancesco Biasetti
| | - Thomas B. Hildebrandt
- Department of Reproduction Management, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
- Department of Veterinary Medicine, Freie Universität, Berlin, Germany
- Thomas B. Hildebrandt
| | - Frank Göritz
- Department of Reproduction Management, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Robert Hermes
- Department of Reproduction Management, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Susanne Holtze
- Department of Reproduction Management, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Cesare Galli
- Avantea, Laboratory of Reproductive Technologies, Cremona, Italy
| | - Giovanna Lazzari
- Avantea, Laboratory of Reproductive Technologies, Cremona, Italy
| | - Silvia Colleoni
- Avantea, Laboratory of Reproductive Technologies, Cremona, Italy
| | - Ilaria Pollastri
- Ethics Laboratory for Veterinary Medicine, Conservation, and Animal Welfare, University of Padua, Padua, Italy
- Department of Comparative Biomedicine and Food Science, University of Padua, Legnaro, Italy
| | - Maria Michela Spiriti
- Ethics Laboratory for Veterinary Medicine, Conservation, and Animal Welfare, University of Padua, Padua, Italy
- Department of Comparative Biomedicine and Food Science, University of Padua, Legnaro, Italy
| | - Jan Stejskal
- ZOO Dvůr Králové, Dvůr Králové nad Labem, Czechia
| | - Steven Seet
- Department of Reproduction Management, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Jan Zwilling
- Department of Reproduction Management, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | | | | | | | | | | | | | - Barbara de Mori
- Ethics Laboratory for Veterinary Medicine, Conservation, and Animal Welfare, University of Padua, Padua, Italy
- Department of Comparative Biomedicine and Food Science, University of Padua, Legnaro, Italy
| |
Collapse
|
6
|
Embryo production by in vitro fertilization in wild ungulates: progress and perspectives. ANNALS OF ANIMAL SCIENCE 2022. [DOI: 10.2478/aoas-2022-0013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
Wild ungulates are of fundamental importance for balancing ecosystems, as well as being the species of economic interest. Increasing concern over the accelerated population reduction of these species has resulted in the development of assisted reproduction techniques, such as in vitro fertilization (IVF), as a tool for conservation and multiplication. In the present scenario, IVF protocols were developed based on the methodologies used for domestic ungulates. Nevertheless, owing to the physiological and reproductive differences among the species, several factors associated with IVF and its relationship with the characteristics of the species of interest require clarification. In vitro conditions for the collection and selection of female and male gametes, oocyte maturation, sperm capacitation, co-incubation of gametes, and embryonic development can influence IVF results. Therefore, the present review considers the main advances in the methodologies already used for wild ungulates, emphasizing the strategies for improving the protocols to obtain better efficiency rates. Additionally, we discuss the conditions of each IVF stage, with emphasis on aspects related to in vitro manipulation and comparability with the protocols for domestic ungulates.
Collapse
|
7
|
The ART of bringing extinction to a freeze - History and future of species conservation, exemplified by rhinos. Theriogenology 2021; 169:76-88. [PMID: 33940218 DOI: 10.1016/j.theriogenology.2021.04.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 04/12/2021] [Accepted: 04/14/2021] [Indexed: 12/18/2022]
Abstract
The ongoing mass extinction of animal species at an unprecedented rate is largely caused by human activities. Progressive habitat destruction and fragmentation is resulting in accelerated loss of biodiversity on a global scale. Over decades, captive breeding programs of non-domestic species were characterized by efforts to optimize species-specific husbandry, to increase studbook-based animal exchange, and to improve enclosure designs. To counter the ongoing dramatic loss of biodiversity, new approaches are warranted. Recently, new ideas, particularly the application of assisted reproduction technologies (ART), have been incorporated into classical zoo breeding programs. These technologies include semen and oocyte collection, artificial insemination, and in-vitro embryo generation. More futuristic ideas of advanced ART (aART) implement recent advances in biotechnology and stem-cell related approaches such as cloning, inner cell mass transfer (ICM), and the stem-cell-associated techniques (SCAT) for the generation of gametes and ultimately embryos of highly endangered species, such as the northern white rhinoceros (Ceratotherium simum cottoni) of which only two female individuals are left. Both, ART and aART greatly depend on and benefit from the rapidly evolving cryopreservation techniques and biobanking not only of genetic, but also of viable cellular materials suitable for the generation of induced pluripotent stem cells (iPSC). The availability of cryopreserved materials bridges gaps in time and space, thereby optimizing the available genetic variability and enhancing the chance to restore viable populations.
Collapse
|
8
|
de Mori B, Spiriti MM, Pollastri I, Normando S, Biasetti P, Florio D, Andreucci F, Colleoni S, Galli C, Göritz F, Hermes R, Holtze S, Lazzari G, Seet S, Zwilling J, Stejskal J, Mutisya S, Ndeereh D, Ngulu S, Vigne R, Hildebrandt TB. An Ethical Assessment Tool (ETHAS) to Evaluate the Application of Assisted Reproductive Technologies in Mammals' Conservation: The Case of the Northern White Rhinoceros ( Ceratotherium simum cottoni). Animals (Basel) 2021; 11:312. [PMID: 33530613 PMCID: PMC7911958 DOI: 10.3390/ani11020312] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 01/15/2021] [Accepted: 01/19/2021] [Indexed: 11/26/2022] Open
Abstract
Assisted reproductive technologies (ARTs) can make a difference in biodiversity conservation. Their application, however, can create risks and raise ethical issues that need addressing. Unfortunately, there is a lack of attention to the topic in the scientific literature and, to our knowledge, there is no tool for the ethical assessment of ARTs in the context of conservation that has been described. This paper reports the first applications of the Ethical Assessment Tool (ETHAS) to trans-rectal ovum pick-up (OPU) and in vitro fertilization (IVF) procedures used in a northern white rhinoceros (Ceratotherium simum cottoni) conservation project. The ETHAS consists of two checklists, the Ethical Evaluation Sheet and the Ethical Risk Assessment, and is specifically customized for each ART procedure. It provides an integrated, multilevel and standardized self-assessment of the procedure under scrutiny, generating an ethical acceptability ranking (totally, partially, not acceptable) and a risk rank (low, medium, high), and, hence, allows for implementing measures to address or manage issues beforehand. The application of the ETHAS to the procedures performed on the northern white rhinoceros was effective in ensuring a high standard of procedures, contributing to the acceptability and improved communication among the project's partners. In turn, the tool itself was also refined through an iterative consultation process between experts and stakeholders.
Collapse
Affiliation(s)
- Barbara de Mori
- Department of Comparative Biomedicine and Food Science, University of Padua, 35020 Padua, Italy; (M.M.S.); (I.P.)
- Ethics Laboratory for Veterinary Medicine, Conservation and Animal Welfare, University of Padua, 35020 Padua, Italy; (P.B.); (D.F.); (F.A.)
| | - Maria Michela Spiriti
- Department of Comparative Biomedicine and Food Science, University of Padua, 35020 Padua, Italy; (M.M.S.); (I.P.)
- Ethics Laboratory for Veterinary Medicine, Conservation and Animal Welfare, University of Padua, 35020 Padua, Italy; (P.B.); (D.F.); (F.A.)
| | - Ilaria Pollastri
- Department of Comparative Biomedicine and Food Science, University of Padua, 35020 Padua, Italy; (M.M.S.); (I.P.)
- Ethics Laboratory for Veterinary Medicine, Conservation and Animal Welfare, University of Padua, 35020 Padua, Italy; (P.B.); (D.F.); (F.A.)
| | - Simona Normando
- Department of Comparative Biomedicine and Food Science, University of Padua, 35020 Padua, Italy; (M.M.S.); (I.P.)
- Ethics Laboratory for Veterinary Medicine, Conservation and Animal Welfare, University of Padua, 35020 Padua, Italy; (P.B.); (D.F.); (F.A.)
| | - Pierfrancesco Biasetti
- Ethics Laboratory for Veterinary Medicine, Conservation and Animal Welfare, University of Padua, 35020 Padua, Italy; (P.B.); (D.F.); (F.A.)
- Department of Reproduction Management, Leibniz Institute for Zoo and Wildlife Research, D-10315 Berlin, Germany; (F.G.); (R.H.); (S.H.)
| | - Daniela Florio
- Ethics Laboratory for Veterinary Medicine, Conservation and Animal Welfare, University of Padua, 35020 Padua, Italy; (P.B.); (D.F.); (F.A.)
- Department of Veterinary Medical Science, University of Bologna, 40064 Bologna, Italy
| | - Francesco Andreucci
- Ethics Laboratory for Veterinary Medicine, Conservation and Animal Welfare, University of Padua, 35020 Padua, Italy; (P.B.); (D.F.); (F.A.)
| | - Silvia Colleoni
- Avantea, Laboratory of Reproductive Technologies, 26100 Cremona, Italy; (S.C.); (C.G.); (G.L.)
| | - Cesare Galli
- Avantea, Laboratory of Reproductive Technologies, 26100 Cremona, Italy; (S.C.); (C.G.); (G.L.)
- Avantea Foundation, 26100 Cremona, Italy
| | - Frank Göritz
- Department of Reproduction Management, Leibniz Institute for Zoo and Wildlife Research, D-10315 Berlin, Germany; (F.G.); (R.H.); (S.H.)
| | - Robert Hermes
- Department of Reproduction Management, Leibniz Institute for Zoo and Wildlife Research, D-10315 Berlin, Germany; (F.G.); (R.H.); (S.H.)
| | - Susanne Holtze
- Department of Reproduction Management, Leibniz Institute for Zoo and Wildlife Research, D-10315 Berlin, Germany; (F.G.); (R.H.); (S.H.)
| | - Giovanna Lazzari
- Avantea, Laboratory of Reproductive Technologies, 26100 Cremona, Italy; (S.C.); (C.G.); (G.L.)
- Avantea Foundation, 26100 Cremona, Italy
| | - Steven Seet
- Science Communication, Science Management, Leibniz Institute for Zoo and Wildlife Research, D-10315 Berlin, Germany; (S.S.); (J.Z.)
| | - Jan Zwilling
- Science Communication, Science Management, Leibniz Institute for Zoo and Wildlife Research, D-10315 Berlin, Germany; (S.S.); (J.Z.)
| | - Jan Stejskal
- ZOO Dvůr Králové, 54401 Dvůr Králové nad Labem, Czech Republic;
| | - Samuel Mutisya
- Ol Pejeta Wildlife Conservancy, Nanyuki 10400, Kenya; (S.M.); (S.N.); (R.V.)
| | | | - Stephen Ngulu
- Ol Pejeta Wildlife Conservancy, Nanyuki 10400, Kenya; (S.M.); (S.N.); (R.V.)
| | - Richard Vigne
- Ol Pejeta Wildlife Conservancy, Nanyuki 10400, Kenya; (S.M.); (S.N.); (R.V.)
| | - Thomas B. Hildebrandt
- Department of Reproduction Management, Leibniz Institute for Zoo and Wildlife Research, D-10315 Berlin, Germany; (F.G.); (R.H.); (S.H.)
- Faculty of Veterinary Medicine, Free University of Berlin, D-14195 Berlin, Germany
| |
Collapse
|
9
|
Pollock KE, O'Brien JK, Roth TL, Proudfoot J, Niederlander J, Micheas L, Robeck TR, Stoops MA. Anti-Müllerian hormone in managed African and Asian rhino species. Gen Comp Endocrinol 2020; 294:113487. [PMID: 32278883 DOI: 10.1016/j.ygcen.2020.113487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 02/14/2020] [Accepted: 04/04/2020] [Indexed: 11/30/2022]
Abstract
Serum collected across the lifespan of four managed rhino species: black (Diceros bicornis, n = 16), white (Ceratotherium simum simum, n = 19), greater one-horned (GOH, Rhinoceros unicornis, n = 11) and Sumatran (Dicerorhinus sumatrensis, n = 6) were validated and analyzed in an anti-Müllerian hormone (AMH) enzyme- linked immunoassay. Concentrations of AMH were examined over time, between sexes and throughout different reproductive states which included n = 3 female white rhinos immunocontracepted with porcine zona pellucida (pZP). Across species, males produced higher AMH concentrations compared to females. Among males, AMH concentrations varied by species aside from comparable values secreted between black and white rhinos. The GOH and Sumatran rhino secreted the highest and lowest male AMH concentrations, respectively. However, within each species, AMH concentrations were similar across male age categories. Preliminary insight into male AMH changes from birth to sexual maturity suggest its potential as a marker for onset of testicular maturation. Female black, GOH and Sumatran rhinos secreted comparable AMH concentrations which were higher than those in white rhino. Within each species, inter-individual variation in AMH secretion occurred among females of similar age. While AMH secretion did not differ across the ages sampled for female white (4->26 yr) and GOH (4-26 yr) rhinos, black and Sumatran rhinos >26 and <4 yr, respectively secreted lower AMH compared to conspecific females 7-26 yr of age. Two idiopathic infertility cases corresponded to low (outside species range) AMH values. The establishment of normative AMH concentrations in managed African and Asian rhinos provides an additional metric beyond traditional sex steroids to assess gonadal function. Further work is needed to determine if AMH can predict fertility potential in rhinos.
Collapse
Affiliation(s)
- K E Pollock
- Center for Conservation and Research of Endangered Wildlife, Cincinnati Zoo & Botanical Garden, 3400 Vine Street, Cincinnati, OH 45220, USA
| | - J K O'Brien
- SeaWorld and Busch Gardens Reproductive Research Center, SeaWorld Parks and Entertainment, 2595 Ingraham St, San Diego, CA 92109, USA
| | - T L Roth
- Center for Conservation and Research of Endangered Wildlife, Cincinnati Zoo & Botanical Garden, 3400 Vine Street, Cincinnati, OH 45220, USA
| | - J Proudfoot
- Indianapolis Zoo, 1200 W Washington St, Indianapolis, IN 46222, USA
| | | | - L Micheas
- University of Missouri, Columbia, MO 65211, USA
| | - T R Robeck
- SeaWorld and Busch Gardens Reproductive Research Center, SeaWorld Parks and Entertainment, 2595 Ingraham St, San Diego, CA 92109, USA
| | - M A Stoops
- Center for Conservation and Research of Endangered Wildlife, Cincinnati Zoo & Botanical Garden, 3400 Vine Street, Cincinnati, OH 45220, USA.
| |
Collapse
|
10
|
Schaffer NE, Agil M, Zainuddin ZZ. Ramifications of reproductive diseases on the recovery of the Sumatran Rhinoceros Dicerorhinus sumatrensis (Mammalia: Perissodactyla: Rhinocerotidae). JOURNAL OF THREATENED TAXA 2020. [DOI: 10.11609/jott.5390.12.3.15279-15288] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
The Sumatran Rhinoceros Dicerorhinus sumatrensis is on the edge of extinction. The decline of this species was initially attributed to poaching and habitat loss, but evidence presented here indicates that reproductive failure has also been a significant cause of loss, and continues to affect wild populations. Indonesia’s remaining populations of Sumatran Rhino are small and scattered, with limited access to breeding opportunities with unrelated mates. This leaves them subject to inbreeding and isolation-induced infertility, linked to fertility problems analyzed here. Sumatran Rhino females in captivity showed high rates (>70%) of reproductive pathology and/or problems with conception, which has significantly hindered the breeding program. Technological advances enabling examination immediately after capture revealed similarly high rates and types of reproductive problems in individuals from wild populations. The last seven Sumatran Rhino females captured were from areas with small declining populations, and six had reproductive problems. Going forward, capturing similarly compromised animals will take up valuable space and resources needed for fertile animals. The high risk of infertility and difficulty of treating underlying conditions, coupled with the decreasing number of remaining animals, means that the success of efforts to build a viable captive population will depend upon utilizing fertile animals and applying assisted reproductive techniques. Decades of exhaustive in situ surveys have not provided information relevant to population management or to ascertaining the fertility status of individual animals. Thus the first priority should be the capture of individuals as new founders from areas with the highest likelihood of containing fertile rhinos, indicated by recent camera trap photos of mothers with offspring. In Sumatra these areas include Way Kambas and parts of the Leuser ecosystem.
Collapse
|
11
|
Pennington PM, Marshall KL, Capiro JM, Felton RG, Durrant BS. Ovulation induction in anovulatory southern white rhinoceros ( Ceratotherium simum simum) without altrenogest. CONSERVATION PHYSIOLOGY 2019; 7:coz033. [PMID: 31249689 PMCID: PMC6589769 DOI: 10.1093/conphys/coz033] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 05/10/2019] [Accepted: 05/16/2019] [Indexed: 06/01/2023]
Abstract
All species in the extant Rhinocerotidae family are experiencing increased threats in the wild, making captive populations essential genetic reservoirs for species survival. However, managed species face distinct challenges in captivity, resulting in populations that are not self-sustaining. Captive southern white rhinoceros (Ceratotherium simum simum) have low reproductive rates and presumed acyclicity is common among females. Although many females fail to ovulate, follicle growth may occur and ovulation can be hormonally induced. Female southern white rhino (n = 6), housed as a bachelorette group, were determined to be ovulatory (n = 1) or anovulatory (n = 5) by serial ultrasound and fecal progestagen analysis. When follicles reached pre-ovulatory size (~35 mm), females (n = 4) were induced to ovulate in 11 trials with a GnRH analog (4.5 mg, SucroMate™) via single intramuscular injection. Nine trials resulted in ovulation (81.8%), all between 36 and 48 hours post-treatment. Ovulations were confirmed by progestagen elevation above baseline coincident with visualization of a corpus luteum (CL). Luteal phases were characterized as short (<50 days) or long (≥50 days). Between short and long cycles, only the number of days of progestagen above baseline was significantly different (P < 0.05), while days with visible luteal structures was not significant (P = 0.11). Both cycle types were observed following both spontaneous and induced ovulations. Furthermore, we showed that longer cycle lengths do not necessarily indicate early pregnancy loss as none of the females were bred or inseminated during the study. While anovulation is common in the southern white rhino captive population, ovulation induction can be achieved efficiently and predictably for use in conjunction with artificial insemination or to facilitate natural breeding. This information will lead to more efficient use of assisted reproductive technologies to overcome reproductive challenges in this species and to generate genetically healthy captive populations as a hedge against extinction.
Collapse
Affiliation(s)
- Parker M Pennington
- Reproductive Sciences, San Diego Zoo Institute for Conservation Research, Escondido CA, USA
| | - Kira L Marshall
- Reproductive Sciences, San Diego Zoo Institute for Conservation Research, Escondido CA, USA
| | - Jonnie M Capiro
- Lead Keeper, San Diego Zoo Safari Park, Rhino Rescue Center, Escondido CA, USA
| | - Rachel G Felton
- Reproductive Sciences, San Diego Zoo Institute for Conservation Research, Escondido CA, USA
| | - Barbara S Durrant
- Reproductive Sciences, San Diego Zoo Institute for Conservation Research, Escondido CA, USA
| |
Collapse
|
12
|
Affiliation(s)
- Parker M. Pennington
- San Diego Zoo Global; Institute for Conservation Research; 15600 San Pasqual Valley Road Escondido CA 92027 USA
| | - Barbara S. Durrant
- San Diego Zoo Global; Institute for Conservation Research; 15600 San Pasqual Valley Road Escondido CA 92027 USA
| |
Collapse
|
13
|
Hildebrandt TB, Hermes R, Colleoni S, Diecke S, Holtze S, Renfree MB, Stejskal J, Hayashi K, Drukker M, Loi P, Göritz F, Lazzari G, Galli C. Embryos and embryonic stem cells from the white rhinoceros. Nat Commun 2018; 9:2589. [PMID: 29973581 PMCID: PMC6031672 DOI: 10.1038/s41467-018-04959-2] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 06/06/2018] [Indexed: 01/12/2023] Open
Abstract
The northern white rhinoceros (NWR, Ceratotherium simum cottoni) is the most endangered mammal in the world with only two females surviving. Here we adapt existing assisted reproduction techniques (ART) to fertilize Southern White Rhinoceros (SWR) oocytes with NWR spermatozoa. We show that rhinoceros oocytes can be repeatedly recovered from live SWR females by transrectal ovum pick-up, matured, fertilized by intracytoplasmic sperm injection and developed to the blastocyst stage in vitro. Next, we generate hybrid rhinoceros embryos in vitro using gametes of NWR and SWR. We also establish embryonic stem cell lines from the SWR blastocysts. Blastocysts are cryopreserved for later embryo transfer. Our results indicate that ART could be a viable strategy to rescue genes from the iconic, almost extinct, northern white rhinoceros and may also have broader impact if applied with similar success to other endangered large mammalian species.
Collapse
Affiliation(s)
- Thomas B Hildebrandt
- Leibniz Institute for Zoo and Wildlife Research, D-10315, Berlin, Germany. .,Freie Universität Berlin, D-14195, Berlin, Germany.
| | - Robert Hermes
- Leibniz Institute for Zoo and Wildlife Research, D-10315, Berlin, Germany
| | - Silvia Colleoni
- Avantea, Laboratory of Reproductive Technologies, 26100, Cremona, Italy
| | - Sebastian Diecke
- Max Delbrück Center, Berlin, Germany.,Berlin Institute of Health, Berlin, Germany
| | - Susanne Holtze
- Leibniz Institute for Zoo and Wildlife Research, D-10315, Berlin, Germany
| | - Marilyn B Renfree
- School of BioSciences, The University of Melbourne, Melbourne, VIC, 3010, Australia
| | - Jan Stejskal
- ZOO Dvůr Králové, Štefánikova 1029, 544 01, Dvůr Králové nad Labem, Czech Republic
| | - Katsuhiko Hayashi
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-0054, Japan
| | - Micha Drukker
- Institute of Stem Cell Research and the Induced Pluripotent Stem Cell Core Facility, Helmholtz Center Munich, 85764, Neuherberg, Germany
| | - Pasqualino Loi
- Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy
| | - Frank Göritz
- Leibniz Institute for Zoo and Wildlife Research, D-10315, Berlin, Germany
| | - Giovanna Lazzari
- Avantea, Laboratory of Reproductive Technologies, 26100, Cremona, Italy.,Fondazione Avantea, 26100, Cremona, Italy
| | - Cesare Galli
- Avantea, Laboratory of Reproductive Technologies, 26100, Cremona, Italy. .,Fondazione Avantea, 26100, Cremona, Italy.
| |
Collapse
|
14
|
Roth TL, Schook MW, Stoops MA. Monitoring and controlling ovarian function in the rhinoceros. Theriogenology 2017; 109:48-57. [PMID: 29249327 DOI: 10.1016/j.theriogenology.2017.12.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 12/01/2017] [Indexed: 10/18/2022]
Abstract
Despite their size and potentially dangerous demeanor, the rhinoceros has been a preferred subject of wildlife reproductive scientists. Several factors contribute to this taxon's popularity including the ability to utilize insightful tools like non-invasive hormone metabolite monitoring and transrectal ultrasonography, the necessity for mate introductions to coincide with the female's estrus when breeding certain species or individuals, and the desire to develop assisted reproductive technologies to facilitate the genetic management and ultimate sustainability of small, managed populations in human care. The resulting profusion of rhinoceros reproductive studies has revealed significant species-specific characteristics and exposed the prevalence of aberrant reproductive activity within this taxon. Of equal importance, it has guided necessary intervention and enhanced our success in overcoming challenges associated with breeding rhinoceroses.
Collapse
Affiliation(s)
- T L Roth
- Center for Conservation and Research of Endangered Wildlife (CREW), Cincinnati Zoo & Botanical Garden, 3400 Vine Street, Cincinnati, OH 45220, USA.
| | - M W Schook
- Disney's Animal Kingdom, 1200 North Savannah Circle East Bay Lake, FL 32830, USA.
| | - M A Stoops
- Center for Conservation and Research of Endangered Wildlife (CREW), Cincinnati Zoo & Botanical Garden, 3400 Vine Street, Cincinnati, OH 45220, USA.
| |
Collapse
|
15
|
Cervantes MP, Palomino JM, Anzar M, Mapletoft RJ, Adams GP. In vivo and in vitro maturation of oocytes collected from superstimulated wood bison (Bison bison athabascae) during the anovulatory and ovulatory seasons. Anim Reprod Sci 2016; 173:87-96. [PMID: 27601321 DOI: 10.1016/j.anireprosci.2016.09.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 08/29/2016] [Accepted: 09/01/2016] [Indexed: 01/21/2023]
Abstract
Experiments were done to compare the in vivo and in vitro maturational characteristics of cumulus-oocyte complexes (COC) collected from live wood bison. In Experiment 1 (anovulatory season), follicular ablation was done to synchronize follicle wave emergence among bison on Day -1, and FSH was given on Days 0 and 2. Bison were then assigned to 5 groups (n=5/group) in which COC were collected by transvaginal follicle aspiration on Day 4 and either fixed immediately with no maturation (control), matured in vitro for 24 or 30h, or collected on Day 5 after in vivo maturation for 24 or 30h (i.e., after hCG treatment). In Experiment 2 (ovulatory season), bison were treated as described for Experiment 1, but PGF2α (cloprostenol) was given to control the luteal phase on Days -9 and 3. In both experiments, cumulus cell expansion was more extensive following in vivo than in vitro maturation, and the percentage of fully expanded COC was highest in the in vivo 30h groups. Nuclear maturation occurred more rapidly in vitro; 60-70% of oocytes were at the MII stage 24h after in vitro maturation while only 25-27% of oocytes had reached the MII stage after 24h of in vivo maturation. In conclusion, nuclear maturation occurred more rapidly during in vitro vs. in vivo maturation, but was associated with less cumulus expansion than in vivo maturation. In vivo oocyte maturation was more complete at 30 vs. 24h after hCG treatment. Season had no effect on the maturational capacity of wood bison oocytes.
Collapse
Affiliation(s)
- Miriam P Cervantes
- Department of Veterinary Biomedical Sciences, University of Saskatchewan, Saskatoon, Canada
| | - J Manuel Palomino
- Department of Veterinary Biomedical Sciences, University of Saskatchewan, Saskatoon, Canada
| | - Muhammad Anzar
- Agriculture and Agri-Food Canada, Saskatoon Research and Development Center, Saskatoon, Canada
| | - Reuben J Mapletoft
- Department of Large Animal Clinical Sciences, University of Saskatchewan, Saskatoon, Canada
| | - Gregg P Adams
- Department of Veterinary Biomedical Sciences, University of Saskatchewan, Saskatoon, Canada.
| |
Collapse
|
16
|
Saragusty J, Diecke S, Drukker M, Durrant B, Friedrich Ben-Nun I, Galli C, Göritz F, Hayashi K, Hermes R, Holtze S, Johnson S, Lazzari G, Loi P, Loring JF, Okita K, Renfree MB, Seet S, Voracek T, Stejskal J, Ryder OA, Hildebrandt TB. Rewinding the process of mammalian extinction. Zoo Biol 2016; 35:280-92. [PMID: 27142508 DOI: 10.1002/zoo.21284] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Accepted: 03/11/2016] [Indexed: 12/15/2022]
Abstract
With only three living individuals left on this planet, the northern white rhinoceros (Ceratotherium simum cottoni) could be considered doomed for extinction. It might still be possible, however, to rescue the (sub)species by combining novel stem cell and assisted reproductive technologies. To discuss the various practical options available to us, we convened a multidisciplinary meeting under the name "Conservation by Cellular Technologies." The outcome of this meeting and the proposed road map that, if successfully implemented, would ultimately lead to a self-sustaining population of an extremely endangered species are outlined here. The ideas discussed here, while centered on the northern white rhinoceros, are equally applicable, after proper adjustments, to other mammals on the brink of extinction. Through implementation of these ideas we hope to establish the foundation for reversal of some of the effects of what has been termed the sixth mass extinction event in the history of Earth, and the first anthropogenic one. Zoo Biol. 35:280-292, 2016. © 2016 The Authors. Zoo Biology published by Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Joseph Saragusty
- The Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | | | - Micha Drukker
- Institute of Stem Cell Research, German Research Center for Environmental Health, Helmholtz Center Munich, Neuherberg, Germany
| | - Barbara Durrant
- San Diego Zoo Institute for Conservation Research, Escondido, California
| | - Inbar Friedrich Ben-Nun
- Department of Chemical Physiology, Center for Regenerative Medicine, The Scripps Research Institute, La Jolla, California
| | - Cesare Galli
- Avantea srl, Laboratorio di Tecnologie della Riproduzione, Cremona, Italy.,Dipartimento Scienze Mediche Veterinarie, Università di Bologna, Ozzano dell'Emilia, Italy.,Fondazione Avantea, Cremona, Italy
| | - Frank Göritz
- The Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Katsuhiko Hayashi
- Faculty of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan
| | - Robert Hermes
- The Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Susanne Holtze
- The Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | | | - Giovanna Lazzari
- Avantea srl, Laboratorio di Tecnologie della Riproduzione, Cremona, Italy.,Fondazione Avantea, Cremona, Italy
| | - Pasqualino Loi
- Faculty of Veterinary Medicine, Univeristy of Teramo, Campus Coste San Agostino, Teramo, Italy
| | - Jeanne F Loring
- Department of Chemical Physiology, Center for Regenerative Medicine, The Scripps Research Institute, La Jolla, California
| | - Keisuke Okita
- Center for iPS Cell Research and Application, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Marilyn B Renfree
- School of BioSciences, The University of Melbourne, Melbourne, Victoria, Australia
| | - Steven Seet
- The Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | | | - Jan Stejskal
- ZOO Dvůr Králové, Dvůr Králové nad Labem, Czech Republic
| | - Oliver A Ryder
- San Diego Zoo Institute for Conservation Research, Escondido, California
| | | |
Collapse
|
17
|
Ginther OJ. How ultrasound technologies have expanded and revolutionized research in reproduction in large animals. Theriogenology 2014; 81:112-25. [PMID: 24274416 DOI: 10.1016/j.theriogenology.2013.09.007] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Revised: 09/06/2013] [Accepted: 09/07/2013] [Indexed: 01/26/2023]
Abstract
Gray-scale ultrasonic imaging (UI) was introduced in 1980 and initially was used to examine clinically the reproductive tract of mares. By 1983 in mares and 1984 in heifers/cows, UI had become a tool for basic research. In each species, transrectal gray-scale UI has been used extensively to characterize follicle dynamics and investigate the gonadotropic control and hormonal role of the follicles. However, the use of transrectal UI has also disclosed and characterized many other aspects of reproduction in each species, including (1) endometrial echotexture as a biological indicator of circulating estradiol concentrations, (2) relative location of the genital tubercle for fetal gender diagnosis by Days 50 to 60, and (3) timing of follicle evacuation during ovulation. Discoveries in mares include (1) embryo mobility wherein the spherical conceptus (6-16 mm) travels to all parts of the uterus on Days 11 to 15, (2) how one embryo of a twin set eliminates the other without self-inflicted damage, and (3) serration of the granulosum of the preovulatory follicle opposite to the future rupture site as an indicator of imminent ovulation. Studies with color-Doppler UI have shown that vascular perfusion of the endometrium follows the equine embryo back and forth between uterine horns and follows the expansion of the bovine allantochorion throughout each horn. In heifers, blood flow in the CL increases during the ascending portion of an individual pulse of PGF2α metabolite and then decreases. These examples highlight the power of UI in reproduction research. Without UI, it is likely that these and many other findings would still be unknown.
Collapse
Affiliation(s)
- O J Ginther
- Eutheria Foundation, Cross Plains, Wisconsin, USA; Department of Pathobiological Sciences, University of Wisconsin-Madison, Madison, Wisconsin, USA.
| |
Collapse
|
18
|
Hermes R, Göritz F, Saragusty J, Stoops MA, Hildebrandt TB. Reproductive tract tumours: the scourge of woman reproduction ails Indian rhinoceroses. PLoS One 2014; 9:e92595. [PMID: 24671211 PMCID: PMC3966795 DOI: 10.1371/journal.pone.0092595] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Accepted: 02/07/2014] [Indexed: 11/18/2022] Open
Abstract
In Indian rhinoceros, extensive leiomyoma, a benign smooth muscle tumour, was sporadically diagnosed post mortem and commonly thought of as contributing factor for reduced fecundity of this species in captivity. However, to date, the prevalence of reproductive tract tumours and their relevance for fecundity are unknown. Our analysis of the international studbook now reveals that females cease reproducing at the age of 18.1±1.2 years; equivalent to a reproductive lifespan of just 9.5±1.3 years. This short reproductive life is in sharp contrast to their longevity in captivity of over 40 years. Here we show, after examining 42% of the captive female population, that age-related genital tract tumours are highly prevalent in this endangered species. Growth and development of these tumours was found to be age-related, starting from the age of 10 years. All females older than 12 years had developed genital tumours, just 7–9 years past maturity. Tumour sizes ranged from 1.5–10 cm. With age, tumours became more numerous, sometimes merging into one large diffuse tumour mass. These tumours, primarily vaginal and cervical, presumably cause widespread young-age infertility by the age of 18 years. In few cases, tumour necrosis suggested possible malignancy of tumours. Possible consequences of such genital tract tumour infestation are hindered intromission, pain during mating, hampered sperm passage, risk of ascending infection during pregnancy, dystocia, or chronic vaginal bleeding. In humans, leiomyoma affect up to 80% of pre-menopause women. While a leading cause for infertility, pregnancy is known to reduce the risk of tumour development. However, different from human, surgical intervention is not a viable treatment option in rhinoceroses. Thus, in analogy to humans, we suggest early onset and seamless consecutive pregnancies to help reduce prevalence of this disease, better maintain a self-sustained captive population and improve animal welfare.
Collapse
Affiliation(s)
- Robert Hermes
- Department Reproduction Management, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
- * E-mail:
| | - Frank Göritz
- Department Reproduction Management, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Joseph Saragusty
- Department Reproduction Management, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Monica A. Stoops
- Center for Conservation and Research of Endangered Wildlife, Cincinnati Zoo and Botanical Garden, Cincinnati, Ohio, United States of America
| | - Thomas B. Hildebrandt
- Department Reproduction Management, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| |
Collapse
|
19
|
Loi P, Saragusty J, Ptak G. Cloning the mammoth: a complicated task or just a dream? ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2014; 753:489-502. [PMID: 25091921 DOI: 10.1007/978-1-4939-0820-2_19] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Recently there has been growing interest in applying the most advanced embryological tools, particularly cloning, to bring extinct species back to life, with a particular focus on the woolly mammoth (Mammuthus primigenius). Mammoth's bodies found in the permafrost are relatively well preserved, with identifiable nuclei in their tissues. The purpose of this chapter is to review the literature published on the topic, and to present the strategies potentially suitable for a mammoth cloning project, with a frank assessment of their feasibility and the ethical issues involved.
Collapse
Affiliation(s)
- Pasqualino Loi
- Department of Comparative Biomedical Sciences, University of Teramo, Piazza Aldo Moro 45, Teramo, 64100, Italy,
| | | | | |
Collapse
|
20
|
Palomino JM, McCorkell RB, Woodbury MR, Cervantes MP, Adams GP. Superstimulatory response and oocyte collection in North American bison during the non-breeding season. Anim Reprod Sci 2013; 140:147-52. [DOI: 10.1016/j.anireprosci.2013.06.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Revised: 06/03/2013] [Accepted: 06/12/2013] [Indexed: 11/26/2022]
|
21
|
|
22
|
Attempted in vitro maturation and fertilization of postmortem Sumatran rhinoceros (Dicerorhinus sumatrensis) oocytes. J Zoo Wildl Med 2012; 42:723-6. [PMID: 22204070 DOI: 10.1638/2010-0186.1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A study was conducted opportunistically to evaluate the potential of rescuing immature oocytes from the ovaries of the Sumatran rhinoceros postmortem. Recovered oocytes (n = 30) were placed in maturation culture for 36 hr and inseminated with frozen-thawed homologous spermatozoa. After culture, evaluation of nuclear maturation status revealed that a large number of oocytes were degenerated (n = 21), but nine oocytes were assessed at the germinal vesicle (n = 3), metaphase I (n = 3), and metaphase II (n = 3) stages. Frozen-thawed Sumatran rhinoceros spermatozoa were capable of binding to the zona pellucida of in vitro matured oocytes, but no fertilization or cleavage resulted. In conclusion, relatively large numbers of oocytes can be obtained by ovarian follicular aspiration postmortem in the Sumatran rhinoceros, and some of these oocytes are capable of achieving nuclear maturation in vitro. However, additional studies are required to improve maturation success and achieve fertilization in culture.
Collapse
|
23
|
Gamete rescue in the African black rhinoceros (Diceros bicornis). Theriogenology 2011; 76:1258-65. [DOI: 10.1016/j.theriogenology.2011.05.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2010] [Revised: 03/16/2011] [Accepted: 05/13/2011] [Indexed: 11/19/2022]
|
24
|
Induced pluripotent stem cells from highly endangered species. Nat Methods 2011; 8:829-31. [PMID: 21892153 DOI: 10.1038/nmeth.1706] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Accepted: 08/19/2011] [Indexed: 12/19/2022]
Abstract
For some highly endangered species there are too few reproductively capable animals to maintain adequate genetic diversity, and extraordinary measures are necessary to prevent extinction. We report generation of induced pluripotent stem cells (iPSCs) from two endangered species: a primate, the drill, Mandrillus leucophaeus and the nearly extinct northern white rhinoceros, Ceratotherium simum cottoni. iPSCs may eventually facilitate reintroduction of genetic material into breeding populations.
Collapse
|
25
|
Schaftenaar W, Fernandes T, Fritsch G, Frey R, Szentiks CA, Wegner RD, Hildebrandt TB, Hermes R. Dystocia and fetotomy associated with cerebral aplasia in a greater one-horned rhinoceros (Rhinoceros unicornis). Reprod Domest Anim 2011; 46:e97-101. [PMID: 20412510 DOI: 10.1111/j.1439-0531.2010.01610.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The captive greater one-horned rhinoceros population consists of 176 animals. Since 1971, a total of 226 calves were born into this captive population. However, 24% of the offspring born were either stillborn or did not survive the first 3 months. The causes for this high rate of stillbirth and neonate mortality have not yet been documented. Here, we report on the veterinary management of a dystocia and foetotomy resulting from a malpositioned greater one-horned rhinoceros foetus. The dead foetus presented with a forelimb flexed at the shoulder joint, with all other joints extended. The foetus was dissected into five parts and extracted during two anaesthesias on two consecutive days. The dam recovered fully and came into oestrous 31 days after surgery. Post-mortem and CT examination of the malformed foetal head revealed cranioschisis with cerebral aplasia and cerebellar hypoplasia. The cerebral aplasia presented here and in other recent cases suggests that neural tube defects and cranial malformations may be associated with more captive rhinoceros stillbirths than previously considered. Epidemiologic studies of these phenomena and possible nutritional deficiencies or hereditary defects are warranted.
Collapse
Affiliation(s)
- W Schaftenaar
- Rotterdam Zoo, Van Aerssenlaan, Rotterdam, the Netherlands
| | | | | | | | | | | | | | | |
Collapse
|
26
|
Saragusty J, Arav A. Current progress in oocyte and embryo cryopreservation by slow freezing and vitrification. Reproduction 2011; 141:1-19. [DOI: 10.1530/rep-10-0236] [Citation(s) in RCA: 328] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Preservation of female genetics is currently done primarily by means of oocyte and embryo cryopreservation. The field has seen much progress during its four-decade history, progress driven predominantly by research in humans, cows, and mice. Two basic cryopreservation techniques rule the field – controlled-rate freezing, the first to be developed, and vitrification, which, in recent years, has gained a foothold. While much progress has been achieved in human medicine, the cattle industry, and in laboratory animals, this is far from being the case for most other mammals and even less so for other vertebrates. The major strides and obstacles in human and other vertebrate oocyte and embryo cryopreservation will be reviewed here.
Collapse
|