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Scherb H, Hayashi K. Spatiotemporal association of low birth weight with Cs-137 deposition at the prefecture level in Japan after the Fukushima nuclear power plant accidents: an analytical-ecologic epidemiological study. Environ Health 2020; 19:82. [PMID: 32646457 PMCID: PMC7346451 DOI: 10.1186/s12940-020-00630-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 06/24/2020] [Indexed: 05/11/2023]
Abstract
BACKGROUND Perinatal mortality increased in contaminated prefectures after the Fukushima Daichi Nuclear Power Plant (FDNPP) accidents in Japan in 2011. Elevated counts of surgeries for cryptorchidism and congenital heart malformations were observed throughout Japan from 2012 onward. The thyroid cancer detection rate (2011 to 2016) was associated with the dose-rate at the municipality level in the Fukushima prefecture. Since the birth weight is a simple and objective indicator for gestational development and pregnancy outcome, the question arises whether the annual birth weight distribution was distorted in a dose-rate-dependent manner across Japan after Fukushima. METHODS The Japanese Ministry of Health, Labour, and Welfare provides prefecture-specific annual counts for 26.158 million live births from 1995 to 2018, of which 2.366 million births (9.04%) with weights < 2500 g. Prefecture-specific spatiotemporal trends of the low birth weight proportions were analyzed. Logistic regression allowing for level-shifts from 2012 onward was employed to test whether those level-shifts were proportional to the prefecture-specific dose-rates derived from Cs-137 deposition in the 47 Japanese prefectures. RESULTS The overall trend of the low birth weight prevalence (LBWp) in Japan discloses a jump in 2012 with a jump odds ratio (OR) 1.020, 95%-confidence interval (1.003,1.037), p-value 0.0246. A logistic regression of LBWp on the additional dose-rate after the FDNPP accidents adjusted for prefecture-specific spatiotemporal base-line trends yields an OR per μSv/h of 1.098 (1.058, 1.139), p-value < 0.0001. Further adjusting the logistic regression for the annual population size and physician density of the prefectures, as well as for the counts of the dead, the missing, and the evacuees due to earthquake and tsunami (as surrogate measures for medical infrastructure and stress) yields an OR per μSv/h of 1.109 (1.032, 1.191), p-value 0.0046. CONCLUSIONS This study shows increased low birth weight prevalence related to the Cs-137 deposition and the corresponding additional dose-rate in Japan from 2012 onward. Previous evidence suggesting compromised gestational development and pregnancy outcome under elevated environmental ionizing radiation exposure is corroborated.
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Affiliation(s)
- Hagen Scherb
- Helmholtz Zentrum München, German Research Center for Environmental Health, Institute of Computational Biology, Ingolstädter Landstr. 1, D-85764 Neuherberg, Germany
| | - Keiji Hayashi
- Hayashi Children’s Clinic, 4-6-11-1F Nagata, Joto-ku Osaka-Shi, Osaka, 536-0022 Japan
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Mayor P, da Silva GP, Andrade RDSD, Monteiro FOB, El Bizri HR. Embryonic and fetal development of the collared peccary (Pecari tajacu). Anim Reprod Sci 2019; 208:106123. [PMID: 31405484 DOI: 10.1016/j.anireprosci.2019.106123] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 07/01/2019] [Accepted: 07/12/2019] [Indexed: 11/16/2022]
Abstract
The relative timing of the main fetal development events in species determine the extent of fetal development at birth, which range along a gradient of having altricial and precocial traits. The results from this study allow for description of important fetal developments in collared peccary (Pecari tajacu) using data from 118 embryo/fetuses from 68 pregnant peccaries obtained over a period of 15 years through collaborative methods with local hunters in the Amazon. The chronological order of emergence of external characteristics in relation to the total dorsal length (TDL) was: differentiated genitalia, limbs and eyelid buds (TDL ≥ 4.5 cm), fusioned eyelids and outer ear (TDL ≥ 5.6 cm), dorsal gland (TDL ≥ 7.3 cm), skin (TDL ≥ 9.2 cm), tactile pelage (TDL ≥ 12.9 cm), coverage pelage (TDL ≥ 17.0 cm), opened eyelids (TDL ≥ 21.5 cm) and tooth eruption (TDL ≥ 24.5 cm). The formula of fetal age was ∛W = 0.079 (t - 27.6), with a linear relationship between TDL and gestational age. The relative weight of tubular gastrointestinal organs, lungs, spleen and thymus increased during fetal development. In contrast, the relative weight of kidneys and liver consistently decreased during the fetal development period. Results of this study indicate the collared peccary is a precocial species and that changes during fetal development are very similar to those in other Suiform species.
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Affiliation(s)
- Pedro Mayor
- Universitat Autònoma de Barcelona (UAB), Departament de Sanitat i d'Anatomia Animals, Facultat de Veterinària, Barcelona, Spain; Museo de Culturas Indígenas Amazónicas, Loreto, Iquitos, Peru; ComFauna, Comunidad de Manejo de Fauna Silvestre en la Amazonía y en Latinoamérica, 332 Malecon Tarapaca, Iquitos, Peru; Federal Rural University of the Amazon (UFRA), Postgraduate Program in Animal Health and Production in Amazonia (PPGSPAA), Belém, PA, Brazil.
| | - Gessiane Pereira da Silva
- Federal Rural University of the Amazon (UFRA), Postgraduate Program in Animal Health and Production in Amazonia (PPGSPAA), Belém, PA, Brazil
| | - Rafael Dos Santos de Andrade
- Federal Rural University of the Amazon (UFRA), Postgraduate Program in Animal Health and Production in Amazonia (PPGSPAA), Belém, PA, Brazil
| | - Frederico Ozanan Barros Monteiro
- Federal Rural University of the Amazon (UFRA), Postgraduate Program in Animal Health and Production in Amazonia (PPGSPAA), Belém, PA, Brazil
| | - Hani Rocha El Bizri
- ComFauna, Comunidad de Manejo de Fauna Silvestre en la Amazonía y en Latinoamérica, 332 Malecon Tarapaca, Iquitos, Peru; Rede de Pesquisa em Diversidade, Conservação e Uso da Fauna na Amazônia (REDEFAUNA), Manaus, Amazonas, Brazil; Mamirauá Sustainable Development Institute (IDSM), Tefé, AM, Brazil; School of Science and the Environment, Manchester Metropolitan University. Oxford Road, M15 6BH, Manchester, United Kingdom
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Mayor P, Habner de Souza Pereira T, Andrade RDSD, González-Benavent E, Barros Monteiro FO, Bodmer R, Valsecchi J, El Bizri HR. Embryonic and fetal development of the red brocket deer (Mazama americana). Theriogenology 2019; 134:53-64. [PMID: 31132721 DOI: 10.1016/j.theriogenology.2019.05.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Revised: 04/22/2019] [Accepted: 05/16/2019] [Indexed: 10/26/2022]
Abstract
The red brocket deer (Mazama americana), a medium-sized Neotropical ungulate, is one of the most hunted mammals in the Amazon. This study analyzes the intrauterine development in the red brocket deer through the description of the external and internal morphology in one embryo and 38 fetuses collected from animals hunted for subsistence in the Amazon. The chronological order of occurrence of external characteristics in relation to the total dorsal length (TDL) was: differentiated genitalia, limbs and eyelid buds (TDL = 3.9 cm), fusioned eyelids, outer ear and hooves (TDL ≥ 9.5 cm), skin (TDL ≥ 20.4 cm), tactile pelage and nasal pigmentation (TDL ≥ 21.5 cm), covering pelage and skin spots (TDL ≥ 31.3 cm), and teeth eruption and opened eyelids (TDL ≥ 34.2 cm). The formula of fetal age was ∛W = 0.072 (t - 42), with a high linear relationship between TDL and gestational age. Multiple linear and non-linear regressions showed strong positive associations between biometric measures and absolute visceral weights with TDL. The relative weight of the tubular gastrointestinal organs, spleen and thymus increased during the fetal development; in contrast, the liver and kidneys' relative weight diminished during the fetal development. Advanced fetuses (≥44.0 cm TDL) had lower proportion of liver and larger tubular gastrointestinal organs within the visceral weight than adults. The chronology of appearance of the main events of the fetal development suggests that the red brocket deer adopt some precocial features, such as the early development of the sensorial function, including the early development of eyelids, outer ear and tactile pelage, the early development of the covering pelage which acts in thermoregulation and the early teeth eruption which allows the early foraging. Nevertheless, the precocial level of the red brocket deer is apparently lower than other species more frequently predated by large felids, such as peccaries and the paca.
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Affiliation(s)
- Pedro Mayor
- Universitat Autònoma de Barcelona (UAB), Departament de Sanitat i d'Anatomia Animals, Facultat de Veterinària, Barcelona, Spain; Museo de Culturas Indígenas Amazónicas, Iquitos, Loreto, Peru; ComFauna, Comunidad de Manejo de Fauna Silvestre en la Amazonía y en Latinoamérica, 332 Malecon Tarapaca, Iquitos, Peru; Rede de Pesquisa em Diversidade, Conservação e Uso da Fauna na Amazônia (REDEFAUNA), Manaus, Amazonas, Brazil; Federal Rural University of the Amazon (UFRA), Postgraduate Program in Animal Health and Production in Amazonia (PPGSPAA), Belém, Pará, Brazil.
| | - Thyago Habner de Souza Pereira
- Federal Rural University of the Amazon (UFRA), Postgraduate Program in Animal Health and Production in Amazonia (PPGSPAA), Belém, Pará, Brazil
| | - Rafael Dos Santos de Andrade
- Federal Rural University of the Amazon (UFRA), Postgraduate Program in Animal Health and Production in Amazonia (PPGSPAA), Belém, Pará, Brazil
| | - Elena González-Benavent
- Universitat Autònoma de Barcelona (UAB), Departament de Sanitat i d'Anatomia Animals, Facultat de Veterinària, Barcelona, Spain
| | - Frederico Ozanan Barros Monteiro
- Federal Rural University of the Amazon (UFRA), Postgraduate Program in Animal Health and Production in Amazonia (PPGSPAA), Belém, Pará, Brazil
| | - Richard Bodmer
- Museo de Culturas Indígenas Amazónicas, Iquitos, Loreto, Peru; ComFauna, Comunidad de Manejo de Fauna Silvestre en la Amazonía y en Latinoamérica, 332 Malecon Tarapaca, Iquitos, Peru; Rede de Pesquisa em Diversidade, Conservação e Uso da Fauna na Amazônia (REDEFAUNA), Manaus, Amazonas, Brazil
| | - João Valsecchi
- ComFauna, Comunidad de Manejo de Fauna Silvestre en la Amazonía y en Latinoamérica, 332 Malecon Tarapaca, Iquitos, Peru; Rede de Pesquisa em Diversidade, Conservação e Uso da Fauna na Amazônia (REDEFAUNA), Manaus, Amazonas, Brazil; Mamirauá Sustainable Development Institute (IDSM), Tefé, Amazonas, Brazil
| | - Hani Rocha El Bizri
- ComFauna, Comunidad de Manejo de Fauna Silvestre en la Amazonía y en Latinoamérica, 332 Malecon Tarapaca, Iquitos, Peru; Rede de Pesquisa em Diversidade, Conservação e Uso da Fauna na Amazônia (REDEFAUNA), Manaus, Amazonas, Brazil; Mamirauá Sustainable Development Institute (IDSM), Tefé, Amazonas, Brazil; School of Science and the Environment, Manchester Metropolitan University, Oxford Road, M15 6BH, Manchester, United Kingdom
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de Andrade RDS, Monteiro FOB, El Bizri HR, Pantoja L, Bodmer R, Valsecchi J, Mayor P. Embryonic and fetal development of the white-lipped peccary (Tayassu pecari). Theriogenology 2018; 119:163-174. [PMID: 30015145 DOI: 10.1016/j.theriogenology.2018.07.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Revised: 07/04/2018] [Accepted: 07/07/2018] [Indexed: 11/28/2022]
Abstract
The white-lipped peccary (Tayassu pecari) is an endangered large-sized Neotropical ungulate that is one of the most hunted mammals in the Amazon. Here, we used two embryos and 102 white-lipped peccary fetuses originated from animals hunted for subsistence in the Peruvian and Brazilian Amazon to describe the intrauterine development of external and internal morphology of this Neotropical ungulate. Logistic regressions were used to estimate the probability of occurrence of main external characteristics in relation to the total dorsal length (TDL), while multiple linear and non-linear regressions were conducted to assess the relationship between external and visceral biometry with TDL. External characteristics appeared in the following chronological order: limbs, differentiated genitalia and opened eyelids (≥5.1 cm TDL), fused eyelids (≥6.2 cm TDL), hooves and outer ear (≥7.9 cm TDL), dorsal gland (≥9.4 cm TDL), skin (≥11.5 cm TDL); tactile pelage (≥13.8 cm TDL), covering pelage (≥20.9 cm TDL), tooth eruption (≥26.4 cm TDL) and opened eyelids (≥27.8 cm TDL). The formula of fetal age was ∛W = 0.084 (t - 31.80), with a high linear relationship between TDL and gestational age. All external biometric parameters and absolute volume of visceral organs showed strong positive relationship with TDL. Except for the liver, we found differences in the relative volume of most visceral organs between advanced fetuses (≥34.2 cm TDL) and adults. The most important events during the intrauterine development in the white-lipped peccary show that, in contrast with the domestic pig, it is a highly precocial species producing newborns with a high fetal growth velocity which allows newborns to achieve an early autonomous functionality. Our results are relevant to improve imaging techniques and assist the reproductive and clinical management for the white-lipped peccary both in captivity and in the wild.
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Affiliation(s)
- Rafael Dos Santos de Andrade
- Federal Rural University of the Amazon (UFRA), Postgraduate Program in Animal Health and Production in Amazonia (PPGSPAA), Belém, PA, Brazil
| | - Frederico Ozanan Barros Monteiro
- Federal Rural University of the Amazon (UFRA), Postgraduate Program in Animal Health and Production in Amazonia (PPGSPAA), Belém, PA, Brazil
| | - Hani Rocha El Bizri
- Manchester Metropolitan University, School of Science and the Environment, Manchester, United Kingdom; Mamirauá Institute for Sustainable Development (IDSM), Tefé, AM, Brazil; ComFauna, Comunidad de Manejo de Fauna Silvestre en la Amazonía y en Latinoamérica, 332 Malecon Tarapaca, Iquitos, Peru
| | - Luciana Pantoja
- Federal Rural University of the Amazon (UFRA), Postgraduate Program in Animal Health and Production in Amazonia (PPGSPAA), Belém, PA, Brazil
| | - Richard Bodmer
- ComFauna, Comunidad de Manejo de Fauna Silvestre en la Amazonía y en Latinoamérica, 332 Malecon Tarapaca, Iquitos, Peru; FUNDAMAZONIA, Iquitos, Loreto, Peru
| | - João Valsecchi
- Mamirauá Institute for Sustainable Development (IDSM), Tefé, AM, Brazil; ComFauna, Comunidad de Manejo de Fauna Silvestre en la Amazonía y en Latinoamérica, 332 Malecon Tarapaca, Iquitos, Peru
| | - Pedro Mayor
- Federal Rural University of the Amazon (UFRA), Postgraduate Program in Animal Health and Production in Amazonia (PPGSPAA), Belém, PA, Brazil; ComFauna, Comunidad de Manejo de Fauna Silvestre en la Amazonía y en Latinoamérica, 332 Malecon Tarapaca, Iquitos, Peru; FUNDAMAZONIA, Iquitos, Loreto, Peru; Universitat Autònoma de Barcelona (UAB), Departament de Sanitat i d'Anatomia Animals, Facultat de Veterinària, Barcelona, Spain.
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