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Perry WB. Travelling in the omics time machine: uncovering mysteries of the extinct Moroccan trout (Salmo pallaryi). JOURNAL OF FISH BIOLOGY 2023; 102:549. [PMID: 36929769 DOI: 10.1111/jfb.15359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
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Appleyard SA, Maher S, Pogonoski JJ, Bent SJ, Chua XY, McGrath A. Assessing DNA for fish identifications from reference collections: the good, bad and ugly shed light on formalin fixation and sequencing approaches. JOURNAL OF FISH BIOLOGY 2021; 98:1421-1432. [PMID: 33484178 DOI: 10.1111/jfb.14687] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 01/12/2021] [Accepted: 01/19/2021] [Indexed: 06/12/2023]
Abstract
Natural history collections are repositories of biodiversity and are potentially used by molecular ecologists for comparative taxonomic, phylogenetic, biogeographic and forensic purposes. Specimens in fish collections are preserved using a combination of methods with many fixed in formalin and then preserved in ethanol for long-term storage. Formalin fixation damages DNA, thereby limiting genetic analyses. In this study, the authors compared the DNA barcoding and identification success for frozen and formalin-fixed tissues obtained from specimens in the CSIRO Australian National Fish Collection. They studied 230 samples from fishes (consisting of >160 fish species). An optimized formalin-fixed, paraffin-embedded DNA extraction method resulted in usable DNA from degraded tissues. Four mini barcoding assays of the mitochondrial DNA (mtDNA) were characterized with Sanger and Illumina amplicon sequencing. In the good quality DNA (without exposure to formalin), up to 88% of the specimens were correctly matched at the species level using the cytochrome oxidase subunit 1 (COI) mini barcodes, whereas up to 58% of the specimens exposed to formalin for less than 8 weeks were correctly identified to species. In contrast, 16S primers provided higher amplification success with formalin-exposed tissues, although the COI gene was more successful for identification. Importantly, the authors found that DNA of a certain size and quality can be amplified and sequenced despite exposure to formalin, and Illumina sequencing provided them with greater power of resolution for taxa identification even when there was little DNA present. Overall, within parameter constraints, this study highlights the possibilities of recovering DNA barcodes for identification from formalin-fixed fish specimens, and the authors provide guidelines for when successful identification could be expected.
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Affiliation(s)
- Sharon A Appleyard
- CSIRO Australian National Fish Collection, National Research Collections Australia, Hobart, Tasmania, Australia
- CSIRO Environomics Future Science Platform, Canberra, Australian Capital Territory, Australia
| | - Safia Maher
- CSIRO Australian National Fish Collection, National Research Collections Australia, Hobart, Tasmania, Australia
- CSIRO Environomics Future Science Platform, Canberra, Australian Capital Territory, Australia
| | - John J Pogonoski
- CSIRO Australian National Fish Collection, National Research Collections Australia, Hobart, Tasmania, Australia
- CSIRO Environomics Future Science Platform, Canberra, Australian Capital Territory, Australia
| | - Stephen J Bent
- CSIRO Environomics Future Science Platform, Canberra, Australian Capital Territory, Australia
- Data 61, CSIRO, Brisbane, Queensland, Australia
| | - Xin-Yi Chua
- CSIRO Environomics Future Science Platform, Canberra, Australian Capital Territory, Australia
- Data 61, CSIRO, Brisbane, Queensland, Australia
- School of Electrical Engineering and Computer Science, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Annette McGrath
- CSIRO Environomics Future Science Platform, Canberra, Australian Capital Territory, Australia
- Data 61, CSIRO, Brisbane, Queensland, Australia
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Palandačić A, Kruckenhauser L, Ahnelt H, Mikschi E. European minnows through time: museum collections aid genetic assessment of species introductions in freshwater fishes (Cyprinidae: Phoxinus species complex). Heredity (Edinb) 2020; 124:410-422. [PMID: 31896822 DOI: 10.1038/s41437-019-0292-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 12/18/2019] [Accepted: 12/18/2019] [Indexed: 11/09/2022] Open
Abstract
Massive fish introductions have taken place throughout much of the world, mostly over the last 70 years, and present a major threat to the genetic diversity of native fishes. Introductions have been reported for European Phoxinus, a ubiquitous small cyprinid that populates a wide variety of habitats. Species delineation in European Phoxinus has proven difficult with one reason being ranges of distribution that often traverse drainage boundaries. The present study combines recent samples with museum samples to better understand the current distribution of Phoxinus species and their distributions prior to the massive introductions of fishes in Europe, and to evaluate the use of museum specimens for species distribution studies. For these purposes, genetic lineages from sites collected prior to 1900 (n = 14), and between 1900 and 1950 (n = 8), were analysed using two mitochondrial and nuclear markers. Although possible fish introductions were detected, our results show that the distribution of genetic lineages of museum samples is comparable to that of the extant lineages of European Phoxinus present in those areas. These observations suggest that in the studied ranges the distribution of Phoxinus lineages has been driven by natural processes.
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Affiliation(s)
- Anja Palandačić
- First Zoological Department, Vienna Museum of Natural History, Burgring 7, 1010, Vienna, Austria.
| | - Luise Kruckenhauser
- Laboratory of Molecular Systematics, Vienna Museum of Natural History, Burgring 7, 1010, Vienna, Austria
| | - Harald Ahnelt
- First Zoological Department, Vienna Museum of Natural History, Burgring 7, 1010, Vienna, Austria.,Department of Theoretical Biology, University of Vienna, Althanstrasse 14, 1090, Vienna, Austria
| | - Ernst Mikschi
- First Zoological Department, Vienna Museum of Natural History, Burgring 7, 1010, Vienna, Austria
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Silva PC, Malabarba MC, Vari (In memoriam) R, Malabarba LR. Comparison and optimization for DNA extraction of archived fish specimens. MethodsX 2019; 6:1433-1442. [PMID: 31249793 PMCID: PMC6584492 DOI: 10.1016/j.mex.2019.06.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 06/01/2019] [Indexed: 11/19/2022] Open
Abstract
The DNA extracted from museum alcohol-fixed specimens can be a valuable source of information for solving taxonomic, phylogenetic, ecological and conservational questions. However, this type of DNA, also called ancient DNA, is routinely obtained in small portions and highly fragmented. We have tested two different extraction kits in museum type-specimens of the fish family Characidae. Aiming to increase the DNA yield, we made modifications on a Qiagen manufacturer protocol, in the elution step. Also, to overcome the issue of DNA fragmentation, we applied our efforts in Sanger sequencing, to find a highly variable and, in result, informative COI fragment. Based on our results, there is no correlation between amount of the DNA extracted and the age of the sample. The Sanger sequencing generated sequences which are useful in solving taxonomic puzzles. Here are presented the customization and guidelines that allowed us to recover DNA from the archived fish specimens. DNA extraction from archived fish specimens is more effective when using silica columns. Change of the elution times from minutes in room temperature to 24 h in freezer greatly improved the DNA yielded. Short but highly variable sequences replace the need to sequence the entire gene to identify a species.
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Affiliation(s)
- Priscilla C. Silva
- Departamento de Zoologia and Programa de Pós-Graduação em Biologia Animal, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, 91.501-970 Porto Alegre, RS, Brazil
- Departamento de Biologia Animal and Programa de Pós-Graduação em Biologia Animal, Universidade Federal de Viçosa, Av. P.H. Rolfs, s/n, 36570-000 Viçosa, MG, Brazil
- Corresponding author.
| | - Maria Claudia Malabarba
- Departamento de Zoologia and Programa de Pós-Graduação em Biologia Animal, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, 91.501-970 Porto Alegre, RS, Brazil
| | | | - Luiz R. Malabarba
- Departamento de Zoologia and Programa de Pós-Graduação em Biologia Animal, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, 91.501-970 Porto Alegre, RS, Brazil
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Siegel SV, Rivero AV, Oberstaller J, Colon BL, de Buron I, Kyle DE. Blood flukes Cardicola parvus and C. laruei (Trematoda: Aporocotylidae): life cycles and cryptic infection in spotted seatrout, Cynoscion nebulosus (Teleost: Sciaenidae). Parasitol Int 2018; 67:150-158. [DOI: 10.1016/j.parint.2017.10.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Revised: 10/24/2017] [Accepted: 10/30/2017] [Indexed: 01/22/2023]
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Silva PC, Malabarba MC, Malabarba LR. Using ancient DNA to unravel taxonomic puzzles: the identity of Deuterodon pedri (Ostariophysi: Characidae). NEOTROPICAL ICHTHYOLOGY 2017. [DOI: 10.1590/1982-0224-20160141] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
ABSTRACT Accurate identification is essential for any study exploring biodiversity. Unfortunately, museum type specimens preserved for more than a hundred years are often not informative enough for precise identification of the species represented by the name-bearing type. The use of ancient DNA can help solve taxonomic problems when name-bearing types no longer have diagnostic morphological features that allow for an accurate identification of the species involved. That is the case for Deuterodon pedri, an endemic species from a small drainage in the rio Doce basin in Minas Gerais, Brazil, for which the type material is in poor condition. Specimens of D. pedri were collected in 1865 by the Thayer Expedition to Brazil and fixed in spirits, enabling them to yield viable DNA. As the morphology alone of the type material does not allow for an accurate identification, we used both morphological and ancient DNA (aDNA) methods to decisively establish the identity of D. pedri. This identification allowed us to recognize the species among recently collected specimens and then, based on them, redescribe the species. A genetype for the lectotype of D. pedri is presented.
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