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Hope SF, Angelier F. Effects of the temperature during embryonic development on adult reproduction and the phenotype of the second generation in zebra finches. J Therm Biol 2024; 119:103787. [PMID: 38281314 DOI: 10.1016/j.jtherbio.2024.103787] [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] [Received: 03/24/2023] [Revised: 01/08/2024] [Accepted: 01/16/2024] [Indexed: 01/30/2024]
Abstract
Across taxa, the temperature experienced by individuals early in life can have large effects on their development. However, comparatively little is known about whether the effects of this thermal developmental environment can be long-lasting or transgenerational. In birds, one important aspect of the developmental environment is incubation and, in general, eggs incubated at low temperatures produce offspring with smaller morphology, suboptimal physiology, and even lower long-term survival. Yet, little is known about whether incubation temperature may affect avian reproduction in adulthood, and nothing is known about whether the effects of avian incubation temperature may be transgenerational. To investigate this, we incubated zebra finch (Taeniopygia guttata) eggs at two different temperatures: 37.5 °C ('control') and 36.3 °C ('low'), raised nestlings until adulthood, and allowed same-temperature treatment pairs to reproduce. We found that F1 individuals incubated at the low temperature had shorter beaks at the start of reproduction than those incubated at the control temperature. Further, compared to those from control parents, F2 offspring from parents incubated at the low temperature had lighter body masses at 5 days-old and had shorter beaks at 30 days-old. However, we found little evidence that incubation temperature affected other aspects of reproduction, with no effect on latency to lay, clutch size, egg mass, incubation period, hatching success/asynchrony, fledging, or the number of offspring that ultimately survived until independence. Overall, we found some evidence that a difference in the early thermal developmental environment can have lasting morphological effects into the next generation. However, future work is needed to determine whether the incubation temperature that birds experience as embryos may influence parental care behaviors or lifetime reproductive success.
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Affiliation(s)
- Sydney F Hope
- Centre d'Etudes Biologiques de Chizé, CNRS - La Rochelle Université, UMR 7372, Villiers en Bois, 79360, France.
| | - Frédéric Angelier
- Centre d'Etudes Biologiques de Chizé, CNRS - La Rochelle Université, UMR 7372, Villiers en Bois, 79360, France
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2
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Gadelha AIBB, de Oliveira MF, de Sousa ACFC, Diniz JARA, Lopes IRG, Fernandes BCC, Pereira AF, de Moura CEB. Extraembryonic membrane morphology in greater rheas ( Rhea americana americana Linnaeus, 1758). ZOOMORPHOLOGY 2023; 142:1-16. [PMID: 37360222 PMCID: PMC10027282 DOI: 10.1007/s00435-023-00602-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 01/16/2023] [Accepted: 02/27/2023] [Indexed: 03/29/2023]
Abstract
The greater rhea, Rhea americana, is a wild ratite of high scientific importance and significant and zootechnical value, especially considering the current development state of Brazilian poultry production, where research aimed at increasing the productivity of these animals has become extremely relevant. Studies concerning fetal attachments and embryonic development are paramount, as they can provide essential information concerning reproductive and nutritional animal management. However, a lack of information on greater rhea fetal morphology is noted. Therefore, the aim of the present study was to establish a standard model for fetal attachments in this species. Greater rhea eggs were incubated from 0 to 36 days, and macroscopic and microscopic embryonic attachment characterizations were performed. Histologically, all embryonic annexes exhibit germ layers, namely the ectoderm (outer layer), mesoderm (middle layer) and endoderm (inner layer). The findings indicate that greater rhea development patterns are similar to other birds.
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Affiliation(s)
- Ana Indira Bezerra Barros Gadelha
- Postgraduate Program in Animal Science, Federal Rural University of Semi-Árido, Rio Grande do Norte Mossoró, Brazil
- Department of Animal Sciences, Federal Rural University of Semi-Árido, Rio Grande do Norte Mossoró, Brazil
- Masters Program in Development and Environment, Federal Rural University of Semi-Árido, Rio Grande do Norte Mossoró, Brazil
| | - Moacir Franco de Oliveira
- Postgraduate Program in Animal Science, Federal Rural University of Semi-Árido, Rio Grande do Norte Mossoró, Brazil
| | | | - João Augusto Rodrigues Alves Diniz
- Postgraduate Program in Animal Science, Federal Rural University of Semi-Árido, Rio Grande do Norte Mossoró, Brazil
- Department of Animal Sciences, Federal Rural University of Semi-Árido, Rio Grande do Norte Mossoró, Brazil
- Doctoral Program in Development and Environment, Federal Rural University of Semi-Árido, Rio Grande do Norte Mossoró, Brazil
| | - Igor Renno Guimarães Lopes
- Postgraduate Program in Animal Science, Federal Rural University of Semi-Árido, Rio Grande do Norte Mossoró, Brazil
- Department of Animal Sciences, Federal Rural University of Semi-Árido, Rio Grande do Norte Mossoró, Brazil
- Doctoral Program in Development and Environment, Federal Rural University of Semi-Árido, Rio Grande do Norte Mossoró, Brazil
| | | | - Alexsandra Fernandes Pereira
- Postgraduate Program in Animal Science, Federal Rural University of Semi-Árido, Rio Grande do Norte Mossoró, Brazil
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Liu X, Fang Y, Ma X, Li P, Wang P, Zhou Z, Liu D. Metabolomic profiling to assess the effects of chlordanes and its bioaccumulation characteristics in chicken embryo. CHEMOSPHERE 2022; 308:136580. [PMID: 36155011 DOI: 10.1016/j.chemosphere.2022.136580] [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: 06/06/2022] [Revised: 09/19/2022] [Accepted: 09/20/2022] [Indexed: 06/16/2023]
Abstract
Although chlordane-related compounds (CHLs) have been regulated, a variety of CHLs are still identified and detected in wild birds and eggs. Embryo is one of fragile periods and is very susceptible to toxic effects of pollutants. In this study, the fate of CHLs during embryo development and degradation of CHLs in neonatal chick were investigated. During embryo development, CHLs were mainly distributed to the liver and muscle, in which trans-nonachlor and an octachlorochlordane (MC5) were hardly metabolized and showed the high persistence, implying a greater risk to birds' offspring. CHLs with the lower Kow were found to be higher uptake efficiency in embryo, implying contaminants with the lower lipophilicity may contribute to their transport to embryo. Furthermore, the effects of CHLs on the metabolome of neonatal chicks was evaluated. The ether lipid metabolism and glycerophospholipid metabolism were found to be significantly affected, which may disturb the angiogenesis and endothelial cell migration in embryogenesis. Taken together, the lipophilicity of contaminants might be a main factor influencing their transport to embryo, and metabolomics results improve understanding of the effects of CHLs on embryo.
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Affiliation(s)
- Xueke Liu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Department of Applied Chemistry, China Agricultural University, Beijing, 100193, PR China
| | - Yaofeng Fang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Department of Applied Chemistry, China Agricultural University, Beijing, 100193, PR China
| | - Xiaoran Ma
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Department of Applied Chemistry, China Agricultural University, Beijing, 100193, PR China
| | - Peize Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Department of Applied Chemistry, China Agricultural University, Beijing, 100193, PR China
| | - Peng Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Department of Applied Chemistry, China Agricultural University, Beijing, 100193, PR China
| | - Zhiqiang Zhou
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Department of Applied Chemistry, China Agricultural University, Beijing, 100193, PR China
| | - Donghui Liu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Department of Applied Chemistry, China Agricultural University, Beijing, 100193, PR China.
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Hope SF, Schmitt L, Lourdais O, Angelier F. Nature vs. Nurture: Disentangling the Influence of Inheritance, Incubation Temperature, and Post-Natal Care on Offspring Heart Rate and Metabolism in Zebra Finches. Front Physiol 2022; 13:892154. [PMID: 35620597 PMCID: PMC9127084 DOI: 10.3389/fphys.2022.892154] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 04/19/2022] [Indexed: 11/16/2022] Open
Abstract
A historic debate in biology is the question of nature vs. nurture. Although it is now known that most traits are a product of both heredity (“nature”) and the environment (“nurture”), these two driving forces of trait development are rarely examined together. In birds, one important aspect of the early developmental environment is egg incubation temperature. Small changes (<1°C) in incubation temperature can have large effects on a wide-array of offspring traits. One important trait is metabolism, because it is related to life-history traits and strategies, organismal performance, and energetic and behavioral strategies. Although it has been shown that embryonic and post-hatch metabolism are related to egg incubation temperature, little is known about how this may vary as a function of genetic differences or post-hatching environmental conditions. Here, we investigated this question in zebra finches (Taeniopygia guttata). We experimentally incubated eggs at two different temperatures: 37.5°C (control), which is optimal for this species and 36.3°C (low), which is suboptimal. We first measured embryonic heart rate as a proxy of embryonic metabolic rate. Then, at hatch, we cross-fostered nestlings to differentiate genetic and pre-hatching factors from post-hatching environmental conditions. When offspring were 30 days-old, we measured their resting metabolic rate (RMR; within the thermoneutral zone) and thermoregulatory metabolic rate (TMR; 12°C; birds must actively thermoregulate). We also measured RMR and TMR of all genetic and foster parents. We found that embryonic heart rate was greater in eggs incubated at the control temperature than those at the low temperature. Further, embryonic heart rate was positively related to genetic father RMR, suggesting that it is both heritable and affected by the pre-natal environment. In addition, we found that post-hatch metabolic rates were positively related to genetic parent metabolic rate, and interactively related to incubation temperature and foster mother metabolic rate. Altogether, this suggests that metabolism and the energetic cost of thermoregulation can be influenced by genetics, the pre-natal environment, and the post-natal environment. Our study sheds light on how environmental changes and parental care may affect avian physiology, as well as which traits may be susceptible to natural selection.
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Differential effects of steroid hormones on levels of broad-sense heritability in a wild bird: possible mechanism of environment × genetic variance interaction? Heredity (Edinb) 2022; 128:63-76. [PMID: 34921237 PMCID: PMC8733014 DOI: 10.1038/s41437-021-00490-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 11/27/2021] [Accepted: 11/30/2021] [Indexed: 01/03/2023] Open
Abstract
Genetic variation is one of the key concepts in evolutionary biology and an important prerequisite of evolutionary change. However, we know very little about processes that modulate its levels in wild populations. In particular, we still are to understand why genetic variances often depend on environmental conditions. One of possible environment-sensitive modulators of observed levels of genetic variance are maternal effects. In this study we attempt to experimentally test the hypothesis that maternally transmitted agents (e.g. hormones) may influence the expression of genetic variance in quantitative traits in the offspring. We manipulated the levels of steroid hormones (testosterone and corticosterone) in eggs laid by blue tits in a wild population. Our experimental setup allowed for full crossing of genetic and rearing effects with the experimental manipulation. We observed that birds treated with corticosterone exhibited a significant decrease in broad-sense genetic variance of tarsus length, and an increase in this component in body mass on the 2nd day post-hatching. Our study indicates, that maternally transmitted substances such as hormones may have measurable impact on the levels of genetic variance and hence, on the evolutionary potential of quantitative traits.
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Bentz AB, Niederhuth CE, Carruth LL, Navara KJ. Prenatal testosterone triggers long-term behavioral changes in male zebra finches: unravelling the neurogenomic mechanisms. BMC Genomics 2021; 22:158. [PMID: 33676394 PMCID: PMC7937265 DOI: 10.1186/s12864-021-07466-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 02/22/2021] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Maternal hormones, like testosterone, can strongly influence developing offspring, even generating long-term organizational effects on adult behavior; yet, the mechanisms facilitating these effects are still unclear. Here, we experimentally elevated prenatal testosterone in the eggs of zebra finches (Taeniopygia guttata) and measured male aggression in adulthood along with patterns of neural gene expression (RNA-seq) and DNA methylation (MethylC-Seq) in two socially relevant brain regions (hypothalamus and nucleus taenia of the amygdala). We used enrichment analyses and protein-protein interaction networks to find candidate processes and hub genes potentially affected by the treatment. We additionally identified differentially expressed genes that contained differentially methylated regions. RESULTS We found that males from testosterone-injected eggs displayed more aggressive behaviors compared to males from control eggs. Hundreds of genes were differentially expressed, particularly in the hypothalamus, including potential aggression-related hub genes (e.g., brain derived neurotrophic factor). There were also enriched processes with well-established links to aggressive phenotypes (e.g., somatostatin and glutamate signaling). Furthermore, several highly connected genes identified in protein-protein interaction networks also showed differential methylation, including adenylate cyclase 2 and proprotein convertase 2. CONCLUSIONS These results highlight genes and processes that may play an important role in mediating the effects of prenatal testosterone on long-term phenotypic outcomes, thereby providing insights into the molecular mechanisms that facilitate hormone-mediated maternal effects.
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Affiliation(s)
- Alexandra B Bentz
- Department of Biology, Indiana University, Bloomington, IN, 47405, USA.
- Center for the Integrative Study of Animal Behavior, Indiana University, Bloomington, IN, 47405, USA.
- Poultry Science Department, University of Georgia, Athens, GA, 30602, USA.
| | - Chad E Niederhuth
- Department of Plant Biology, Michigan State University, East Lansing, MI, 48823, USA
| | - Laura L Carruth
- Neuroscience Institute, Georgia State University, Atlanta, GA, 30303, USA
| | - Kristen J Navara
- Poultry Science Department, University of Georgia, Athens, GA, 30602, USA
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Heddle C, Elliott JE, Brown TM, Eng ML, Perkins M, Basu N, Williams TD. Continuous exposure to mercury during embryogenesis and chick development affects later survival and reproduction of zebra finch (Taeniopygia guttata). ECOTOXICOLOGY (LONDON, ENGLAND) 2020; 29:1117-1127. [PMID: 31352572 DOI: 10.1007/s10646-019-02074-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/21/2019] [Indexed: 06/10/2023]
Abstract
Methylmercury (MeHg) is a global environmental contaminant that bioaccumulates and has multiple toxic modes of action. Aquatic species have traditionally been the focus of wildlife toxicological research on mercury, but terrestrial organisms, including passerine birds, can be exposed to similarly elevated levels of MeHg. In this study we exposed a model passerine, the zebra finch (Taeniopygia guttata), to MeHg in ovo, as chicks only, or with a combined 'in ovo + chick' treatment. We isolated exposure to specific developmental stages through the use of egg injections (3.2 µg Hg/g egg) and controlled oral dosing of chicks (0.24 µg Hg/g bw/day from day 1 to day 30). In ovo exposure to MeHg reduced hatching success, but there was no effect of MeHg on chick growth. We found that in ovo only or chick only exposure did not have long-term effects, but there was some evidence for longer-term effects of combined 'in ovo + chick' exposure on post-fledging survival and potentially sex-biased survival which resulted in very few 'in ovo + chick' exposed females surviving to breed. These females also had lower overall breeding productivity that was mainly due to lower hatching success of their offspring, not lower chick-rearing success. We found no effect of treatment on clutch size or latency to laying among females that did lay eggs. Our study suggests that combined embryonic and nestling MeHg exposure has compounding latent effects on productivity, likely through a mechanism that influences the ability of females to lay fertile eggs that hatch.
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Affiliation(s)
- Cybele Heddle
- Biological Sciences, Simon Fraser University, Biological Sciences, Burnaby, BC, V5A 1S6, Canada
| | - John E Elliott
- Biological Sciences, Simon Fraser University, Biological Sciences, Burnaby, BC, V5A 1S6, Canada.
- Environment and Climate Change Canada, Ecotoxicology and Wildlife Health Directorate, Delta, BC, V4K 3N2, Canada.
| | - Tanya M Brown
- Biological Sciences, Simon Fraser University, Biological Sciences, Burnaby, BC, V5A 1S6, Canada
| | - Margaret L Eng
- Biological Sciences, Simon Fraser University, Biological Sciences, Burnaby, BC, V5A 1S6, Canada
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK, S7N 5B3, Canada
| | - Marie Perkins
- Faculty of Agricultural and Environmental Sciences, McGill University, Montreal, QC, H9X 3V9, Canada
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA
| | - Niladri Basu
- Faculty of Agricultural and Environmental Sciences, McGill University, Montreal, QC, H9X 3V9, Canada
| | - Tony D Williams
- Biological Sciences, Simon Fraser University, Biological Sciences, Burnaby, BC, V5A 1S6, Canada
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Farhat A, Crump D, Bidinosti L, Boulanger E, Basu N, Hecker M, Head JA. An Early-Life Stage Alternative Testing Strategy for Assessing the Impacts of Environmental Chemicals in Birds. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2020; 39:141-154. [PMID: 31449668 DOI: 10.1002/etc.4582] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 07/23/2019] [Accepted: 08/22/2019] [Indexed: 06/10/2023]
Abstract
Early-life stage (ELS) toxicity tests are recognized as an advancement over current testing methodologies in terms of cost, animal use, and biological relevance. However, standardized ELS tests are not presently available for some vertebrate taxa, including birds. The present study describes a Japanese quail (Coturnix japonica) ELS test that is a promising candidate for standardization and applies it to test 8 environmental chemicals (ethinylestradiol, benzo[a]pyrene, chlorpyrifos, fluoxetine, lead(II)nitrate, trenbolone, seleno-L-methionine, hexabromocyclododecane). Individual chemicals were injected into the air cell of unincubated Japanese quail eggs at 3 concentrations, all predicted to cause ≤20% mortality. Survival to embryonic day 16 was consistently high (>90%) among the vehicle-injected controls. All chemicals, except ethinylestradiol, were detected in liver tissue, most at concentrations suggestive of embryonic clearance. Adverse effects were observed for 5 of the 8 chemicals; chlorpyrifos (41.1 µg/g) significantly increased developmental abnormalities and decreased embryo and gallbladder mass. Ethinylestradiol (54.2 µg/g) and hexabromocyclododecane (0.02 µg/g) decreased embryo mass and tarsus length, respectively. Benzo[a]pyrene (0.83 µg/g) and fluoxetine hydrochloride (32.7 µg/g) exceeded the 20% mortality cutoff. No effects were observed following lead(II)nitrate, seleno-L-methionine, or trenbolone exposure up to 10.7, 0.07, and 4.4 µg/g, respectively. Overall, our ELS approach was time- and cost-effective, caused minimal mortality in controls, effectively delivered diverse chemicals to the embryo, and permitted identification of apical outcomes, all of which provide support toward standardization. Environ Toxicol Chem 2019;39:141-154. © 2019 SETAC.
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Affiliation(s)
- Amani Farhat
- National Wildlife Research Centre, Environment and Climate Change Canada, Ottawa, Ontario, Canada
| | - Doug Crump
- National Wildlife Research Centre, Environment and Climate Change Canada, Ottawa, Ontario, Canada
| | - Lisa Bidinosti
- Department of Natural Resource Sciences, McGill University, Montreal, Quebec, Canada
| | - Emily Boulanger
- Department of Natural Resource Sciences, McGill University, Montreal, Quebec, Canada
| | - Nil Basu
- Department of Natural Resource Sciences, McGill University, Montreal, Quebec, Canada
| | - Markus Hecker
- Toxicology Centre and School of the Environment and Sustainability, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Jessica A Head
- Department of Natural Resource Sciences, McGill University, Montreal, Quebec, Canada
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Hruba H, Abdelsalam EEE, Anisimov N, Bandouchova H, Havelkova B, Heger T, Kanova M, Kovacova V, Nemcova M, Piacek V, Sedlackova J, Vitula F, Pikula J. Reproductive toxicity of fluoroquinolones in birds. BMC Vet Res 2019; 15:209. [PMID: 31226987 PMCID: PMC6588855 DOI: 10.1186/s12917-019-1957-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 06/11/2019] [Indexed: 02/06/2023] Open
Abstract
Background While commercial poultry and captive birds are exposed to antimicrobials through direct medication, environmental pollution may result in contamination of wild birds. Fluoroquinolones are commonly used medications to treat severe avian bacterial infections; however, their adverse effects on birds remain understudied. Here, we examine toxicity of enrofloxacin and marbofloxacin during the egg incubation period using the chicken (Gallus Gallus domesticus) as a model avian species. Laboratory tests were based on eggs injected with 1, 10 and 100 μg of fluoroquinolones per 1 g of egg weight prior to the start of incubation and monitoring of chick blood biochemistry, reproductive parameters and heart rate during incubation. Results Eggs treated with fluoroquinolones displayed reduced hatchability due to embryonic mortality, particularly on day 13 of incubation. Total hatching success showed a similar pattern, with a significantly reduced hatchability in low and high exposure groups treated with both enrofloxacin and marbofloxacin. From 15 to 67% of chicks hatching in these groups exhibited joint deformities. Hatching one-day pre-term occurred with a prevalence of 31 to 70% in all groups treated with fluoroquinolones. Embryonic heart rate, measured on days 13 and 19 of incubation, increased in all enrofloxacin-treated groups and medium and high dose groups of marbofloxacin-treated eggs. Blood biochemistry of chicks sampled at hatch from medium dose groups showed hypoproteinaemia, decreased uric acid and increased triglycerides. Chicks from the enrofloxacin-treated group displayed mild hyperglycaemia and a two-fold rise in the blood urea nitrogen to uric acid ratio. Principal components analysis based on blood biochemistry clearly separated the control bird cluster from both enrofloxacin- and marbofloxacin-treated birds. Conclusions Fluoroquinolones induce complex adverse effects on avian embryonic development, considerably reducing the performance of incubated eggs and hatching chicks. Cardiotoxicity, which quickens embryonic heart rate, meant that the total number of heart beats required for embryogenesis was achieved earlier than in the standard incubation period, resulting in pre-term hatching. Our data suggest that enrofloxacin has a higher potential for adverse effects than marbofloxacin. To conclude, care should be taken to prevent exposure of reproducing birds and their eggs to fluoroquinolones. Electronic supplementary material The online version of this article (10.1186/s12917-019-1957-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hana Hruba
- Department of Ecology and Diseases of Game, Fish, and Bees, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Palackeho tr. 1946/1, 612 42, Brno, Czech Republic
| | - Ehdaa Eltayeb Eltigani Abdelsalam
- Department of Ecology and Diseases of Game, Fish, and Bees, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Palackeho tr. 1946/1, 612 42, Brno, Czech Republic
| | - Nikolay Anisimov
- Institute of Environmental and Agricultural Biology (X-BIO), Tyumen State University, Volodarskogo 6, 625003, Tyumen, Russia
| | - Hana Bandouchova
- Department of Ecology and Diseases of Game, Fish, and Bees, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Palackeho tr. 1946/1, 612 42, Brno, Czech Republic
| | - Barbora Havelkova
- Department of Ecology and Diseases of Game, Fish, and Bees, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Palackeho tr. 1946/1, 612 42, Brno, Czech Republic
| | - Tomas Heger
- Department of Ecology and Diseases of Game, Fish, and Bees, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Palackeho tr. 1946/1, 612 42, Brno, Czech Republic
| | - Miroslava Kanova
- Department of Ecology and Diseases of Game, Fish, and Bees, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Palackeho tr. 1946/1, 612 42, Brno, Czech Republic
| | - Veronika Kovacova
- Department of Ecology and Diseases of Game, Fish, and Bees, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Palackeho tr. 1946/1, 612 42, Brno, Czech Republic
| | - Monika Nemcova
- Department of Ecology and Diseases of Game, Fish, and Bees, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Palackeho tr. 1946/1, 612 42, Brno, Czech Republic
| | - Vladimir Piacek
- Department of Ecology and Diseases of Game, Fish, and Bees, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Palackeho tr. 1946/1, 612 42, Brno, Czech Republic
| | - Jana Sedlackova
- Department of Ecology and Diseases of Game, Fish, and Bees, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Palackeho tr. 1946/1, 612 42, Brno, Czech Republic
| | - Frantisek Vitula
- Department of Ecology and Diseases of Game, Fish, and Bees, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Palackeho tr. 1946/1, 612 42, Brno, Czech Republic
| | - Jiri Pikula
- Department of Ecology and Diseases of Game, Fish, and Bees, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Palackeho tr. 1946/1, 612 42, Brno, Czech Republic. .,CEITEC - Central European Institute of Technology, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic.
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10
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Torres R, Chin E, Rampton R, Williams TD. Are there synergistic or antagonistic effects of multiple maternally-derived egg components (antibodies and testosterone) on offspring phenotype? J Exp Biol 2019; 222:jeb.196956. [DOI: 10.1242/jeb.196956] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Accepted: 03/20/2019] [Indexed: 01/13/2023]
Abstract
Eggs are ‘multivariate’ in that they contain multiple maternally-derived egg components (e.g. hormones, antibodies, mRNA, antioxidants) which are thought to influence offspring phenotype. However, most studies have focused on single egg components and on short-term effects. Here, we simultaneously manipulated two egg components, maternally-derived antibodies (MAb) and yolk testosterone (T) to assess potential synergistic or antagonistic effects on offspring phenotype from hatching to sexual maturity. We found no evidence for short-or long-term effects of either MAb or yolk T alone, or their interaction, on hatching mass, size at fledging (tarsus), body mass at sexual maturity (day 82), chick survival, humoral immune function, or any measured female reproductive trait at sexual maturity. There was a positive effect of yolk T, but not MAb, on offspring PHA response at 26 days of age but at 82 days of age MAb, but not yolk T, had a positive effect on PHA response. There was also a MAb*sex interaction on 30 day chick mass, and a positive effect of yolk T on male courtship behaviour at sexual maturity. However, we found no evidence for synergy, i.e. where offspring treated both with MAb and yolk T had higher trait values than offspring treated with either MAb or yolk T alone for any measured trait. Similarly, evidence for antagonistic (compensatory) effects, where offspring treated both with MAb and yolk T had intermediate trait values compared with offspring treated with either MAb or yolk T alone, was equivocal.
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Affiliation(s)
- Roxana Torres
- Instituto de Ecologia, Universidad Nacional Autonoma de Mexico, A.P. 70-275, Mexico D.F., 04510, Mexico
| | - Eunice Chin
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, V5A 4H8, Canada
| | - Rowan Rampton
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, V5A 4H8, Canada
| | - Tony D Williams
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, V5A 4H8, Canada
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Eng ML, Winter V, Elliott JE, MacDougall-Shackleton SA, Williams TD. Embryonic exposure to environmentally relevant concentrations of a brominated flame retardant reduces the size of song-control nuclei in a songbird. Dev Neurobiol 2018; 78:799-806. [PMID: 29786974 DOI: 10.1002/dneu.22604] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 04/12/2018] [Accepted: 05/01/2018] [Indexed: 02/28/2024]
Abstract
Environmental contaminants have the potential to act as developmental stressors and impair development of song and the brain of songbirds, but they have been largely unstudied in this context. 2,2',4,4',5-Pentabromodiphenyl ether (BDE-99) is a brominated flame retardant congener that has demonstrated endocrine disrupting effects, and has pervaded the global environment. We assessed the effects of in ovo exposure to environmentally relevant levels of BDE-99 on the neuroanatomy of the song-control system in a model songbird species, the zebra finch (Taeniopygia guttata). Embryos were exposed via egg injection to a vehicle control (DMSO), 10, 100, or 1000 ng BDE-99/g egg on the day the egg was laid. Chicks were raised to sexual maturity to investigate long-term effects of BDE-99 on the adult male brain. Three key song-control nuclei (Area X, HVC, RA) all showed a dose-dependent trend toward decreasing volume as BDE-99 concentration increased, and birds exposed to 1000 ng/g in ovo BDE-99 had significantly smaller song-control nuclei volume compared to control birds. High environmental concentrations of BDE-99 in avian tissues can be within that range and thus could affect development of the song-control system in birds, and potentially other processes. We previously found that BDE-99 exposure during the nestling period had no effect of on the song-control system, although it did have significant effects on some behaviural endpoints. Taken together, these results suggest that exposure to polybrominated diphenyl ether (PBDEs) during critical developmental windows can significantly alter neurological development. © 2018 Wiley Periodicals, Inc. Develop Neurobiol, 2018.
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Affiliation(s)
- Margaret L Eng
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Canada
| | - Viktoria Winter
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Canada
| | - John E Elliott
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Canada
- Environment and Climate Change Canada, Pacific Wildlife Research Centre, Delta, British Columbia, V4K 3N2, Canada
| | - Scott A MacDougall-Shackleton
- Department of Psychology and Advanced Facility for Avian Research, Western University, London, Ontario, N6A 5C2, Canada
| | - Tony D Williams
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Canada
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Gobeli A, Crossley D, Johnson J, Reyna K. The effects of neonicotinoid exposure on embryonic development and organ mass in northern bobwhite quail (Colinus virginianus). Comp Biochem Physiol C Toxicol Pharmacol 2017; 195:9-15. [PMID: 28188895 DOI: 10.1016/j.cbpc.2017.02.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 02/02/2017] [Accepted: 02/04/2017] [Indexed: 11/17/2022]
Abstract
Since their emergence in the early 1990s, neonicotinoid use has increased exponentially to make them the world's most prevalent insecticides. Although there has been considerable research concerning the lethality of neonicotinoids, their sub-lethal and developmental effects are still being explored, especially with regard to non-mammalian species. The goal of this research was to investigate the effects of the neonicotinoid imidacloprid on the morphological and physiological development of northern bobwhite quail (Colinus virginianus). Bobwhite eggs (n=390) were injected with imidacloprid concentrations of 0 (sham), 10, 50, 100, and 150mg/kg of egg mass, which was administered at day 0 (pre-incubation), 3, 6, 9, or 12 of growth. Embryos were dissected, weighed, staged, and examined for any overt structural deformities after 19days of incubation. The mass of the embryonic heart, liver, lungs and kidneys was also recorded. The majority of treatments produced no discernible differences in embryo morphology; however, in some instances, embryos were subject to increased frequency of anatomical deformity and altered organ masses. Some impacts were more pronounced in specific dosing periods, implying that there may be critical windows of development when embryos are more susceptible to neonicotinoid exposure. This investigation suggests that imidacloprid has the potential to impact bobwhite quail embryonic development and chick survival.
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Affiliation(s)
- Amanda Gobeli
- University of North Texas, Department of Biological Sciences, Denton, TX 76203, USA
| | - Dane Crossley
- University of North Texas, Department of Biological Sciences, Denton, TX 76203, USA
| | - Jeff Johnson
- University of North Texas, Department of Biological Sciences, Denton, TX 76203, USA
| | - Kelly Reyna
- University of North Texas, Department of Biological Sciences, Denton, TX 76203, USA.
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13
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Assessment of neuroanatomical and behavioural effects of in ovo methylmercury exposure in zebra finches ( Taeniopygia guttata ). Neurotoxicology 2017; 59:33-39. [DOI: 10.1016/j.neuro.2017.01.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 01/03/2017] [Accepted: 01/04/2017] [Indexed: 12/25/2022]
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14
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Li ZR, Luo XJ, Huang LQ, Mai BX. In ovo uptake, metabolism, and tissue-specific distribution of chiral PCBs and PBDEs in developing chicken embryos. Sci Rep 2016; 6:36597. [PMID: 27819361 PMCID: PMC5098194 DOI: 10.1038/srep36597] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 09/29/2016] [Indexed: 11/28/2022] Open
Abstract
Fertilized chicken eggs were injected with environmental doses of 4 chiral polychlorinated biphenyls (PCBs) and 8 polybrominated biphenyl ethers (PBDEs) to investigate their uptake, metabolism in the embryo, and distribution in the neonate chicken. PCB95 uptake was the most efficient (80%) whereas BDE209 was the least (56%). Embryos metabolized approximately 52% of the PCBs absorbed. Though some degree of metabolism in the first 18 days, most of the PCBs and PBDEs was metabolized in the last three days, when BDE85, 99, 153, and 209 decrease by 11–37%. Enantioselective metabolism of the (+) enantiomers of PCB95, 149, and 132 and the (−) enantiomer of PCB91 was observed. The enantioselective reactivity was higher with the two penta-PCBs than the two tetra-PCBs. Liver, exhibited high affinity for high lipophilic chemicals, enrich all chemicals that was deflected in other tissues except for some special chemicals in a given tissues. Lipid composition, time of organ formation, and metabolism contribute to the distribution of chemicals in the neonate chicken. The result of this study will improve our understanding on the fate and potential adverse effects of PCBs and PBDEs in the neonate chicken.
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Affiliation(s)
- Zong-Rui Li
- State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiao-Jun Luo
- State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Li-Qian Huang
- State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Bi-Xian Mai
- State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
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Yu MS, Eng ML, Williams TD, Basu N, Elliott JE. Acute embryotoxic effects but no long-term reproductive effects of in ovo methylmercury exposure in zebra finches (Taeniopygia guttata). ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2016; 35:1534-1540. [PMID: 26573953 DOI: 10.1002/etc.3307] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 10/12/2015] [Accepted: 11/11/2015] [Indexed: 06/05/2023]
Abstract
Mercury bioaccumulates in terrestrial ecosystems as methylmercury (MeHg), yet little is known about its effects on terrestrial organisms, including songbirds. The authors used a model songbird species, the zebra finch (Taeniopygia guttata), to assess short-term embryotoxic effects of in ovo MeHg exposure on hatching success and posthatching growth and nestling survival, as well as longer-term effects on mating behavior and reproduction. Egg treatment groups included a low-MeHg dose of 0.2 μg Hg g(-1) egg (n = 36), a high-MeHg dose of 3.2 μg Hg g(-1) egg (n = 49), and a control (n = 34). Doses were dissolved in nanopure filtered water and injected into the albumen on the day eggs showed signs of viability (3 d incubation). In ovo exposure to MeHg significantly reduced hatching success (53% in the high-MeHg dose group vs 94% in vehicle controls). Among hatched chicks, however, no effects of MeHg on growth, hematological variables, or nestling survival were detected. While the in ovo injection method resulted in a dose-dependent pattern of MeHg concentrations in blood of surviving chicks at 15 d and 30 d posthatching, there was evidence of rapid excretion of MeHg with nestling age during that growth period. At reproductive maturity (90 d of age), no long-term effects of in ovo exposure to MeHg on female mating behavior, reproductive effort (egg or clutch size), or growth and survivorship of offspring were observed. Environ Toxicol Chem 2016;35:1534-1540. © 2015 SETAC.
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Affiliation(s)
- Maria S Yu
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Margaret L Eng
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
- Environment Canada, Science & Technology Branch, Pacific Wildlife Research Centre, Delta, British Columbia, Canada
| | - Tony D Williams
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Niladri Basu
- Faculty of Agricultural and Environmental Sciences, McGill University, Ste. Anne de Bellevue, Quebec, Canada
| | - John E Elliott
- Environment Canada, Science & Technology Branch, Pacific Wildlife Research Centre, Delta, British Columbia, Canada
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Parolini M, Colombo G, Valsecchi S, Mazzoni M, Possenti CD, Caprioli M, Dalle-Donne I, Milzani A, Saino N, Rubolini D. Potential toxicity of environmentally relevant perfluorooctane sulfonate (PFOS) concentrations to yellow-legged gull Larus michahellis embryos. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:426-437. [PMID: 26310703 DOI: 10.1007/s11356-015-5248-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Accepted: 08/13/2015] [Indexed: 06/04/2023]
Abstract
Perfluooctane sulfonate (PFOS) is considered an emerging pollutant because of its wide distribution in both aquatic and terrestrial ecosystems, as well as its potential toxicity to living organisms. Although PFOS environmental levels and the adverse effects on classical model organisms in toxicological studies are well known, including developmental alterations and alteration of oxidative status, its toxicity to free-living species has been seldom investigated. The aim of this study was to assess the potential toxicity of environmental levels of PFOS to yellow-legged gull (Larus michahellis) embryos under field experimental conditions. In a within-clutch experimental design, we injected two PFOS concentrations (100 ng PFOS/g egg weight and 200 ng PFOS/g egg weight) in ovo soon after laying. Eggs were collected when they reached the cracking stage. We investigated the effects of PFOS treatment, laying order and sex on both morphological and biochemical endpoints of embryos. Specifically, we assessed changes in embryo body mass and tarsus length, as well as in liver and brain mass. Moreover, the imbalance of oxidative status was evaluated in both liver and brain from embryos by measuring total antioxidant capacity (TAC) and total oxidant status (TOS), while the levels of protein carbonyl content (PCO) and DNA fragmentation were measured as oxidative and genetic damage endpoints, respectively. The concentrations of PFOS we tested did not significantly alter the morphological endpoints, independently of laying order and sex. Similarly, embryo oxidative status and oxidative and genetic damage were not significantly affected by PFOS in ovo exposure. These findings suggest that current environmental PFOS levels do not affect early development of yellow-legged gull embryos.
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Affiliation(s)
- Marco Parolini
- Department of Biosciences, University of Milan, via Celoria 26, I-20133, Milan, Italy.
| | - Graziano Colombo
- Department of Biosciences, University of Milan, via Celoria 26, I-20133, Milan, Italy
| | - Sara Valsecchi
- IRSA-CNR-Water Research Institute, National Research Council, Via Mulino 19, I-20861, Brugherio, MB, Italy
| | - Michela Mazzoni
- IRSA-CNR-Water Research Institute, National Research Council, Via Mulino 19, I-20861, Brugherio, MB, Italy
| | | | - Manuela Caprioli
- Department of Biosciences, University of Milan, via Celoria 26, I-20133, Milan, Italy
| | - Isabella Dalle-Donne
- Department of Biosciences, University of Milan, via Celoria 26, I-20133, Milan, Italy
| | - Aldo Milzani
- Department of Biosciences, University of Milan, via Celoria 26, I-20133, Milan, Italy
| | - Nicola Saino
- Department of Biosciences, University of Milan, via Celoria 26, I-20133, Milan, Italy
| | - Diego Rubolini
- Department of Biosciences, University of Milan, via Celoria 26, I-20133, Milan, Italy
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Zheng XB, Luo XJ, Zeng YH, Wu JP, Chen SJ, Mai BX. Halogenated flame retardants during egg formation and chicken embryo development: maternal transfer, possible biotransformation, and tissue distribution. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2014; 33:1712-1719. [PMID: 24888473 DOI: 10.1002/etc.2588] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2013] [Revised: 02/18/2014] [Accepted: 03/18/2014] [Indexed: 06/03/2023]
Abstract
Hen muscle, eggs, and newborn chick tissues (muscle and liver) were collected from an electronic waste recycling site in southern China. The authors examined the maternal transfer, potential metabolism, and tissue distribution of several halogenated flame retardants (HFRs) during egg formation and chicken embryo development. The pollutant composition changes significantly from hen muscle to eggs and from eggs to tissues of newborn chicks. Higher-halogenated chemicals, such as octa- to deca-polybrominated diphenyl ether (PBDE) congeners, deca-polybrominated biphenyl (PBB209), and dechlorane plus (DP), are less readily transferred to eggs compared with lower-halogenated chemicals. During embryo development, PBDEs are the most likely to be metabolized, whereas decabromodiphenyl ethane (DBDPE) is the least. The authors also observed selective maternal transfer of anti-DP and stereoselective metabolism of syn-DP during chicken embryo development. During tissue development, liver has greater affinity than the muscle for chemcials with a high log octanol-water partition coefficient, with the exception of DBDPE. The differences in metabolism potential of different chemicals in chicken embryos cause pollutant composition alterations. Halogenated flame retardant from maternal transfer and tissue distribution also exhibited chemical specificity, especially for DBDPE. Levels of DBDPE were elevated along with the full process from hen muscle to eggs and from eggs to chick tissues. More attention should be paid to the selective accumulation and biotransformation of HFRs in the early development stage of birds.
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Affiliation(s)
- Xiao-Bo Zheng
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China; Graduate University of the Chinese Academy of Sciences, Beijing, China
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Murray JR, Stanciauskas ME, Aralere TS, Saha MS. Dissection and downstream analysis of zebra finch embryos at early stages of development. J Vis Exp 2014:e51596. [PMID: 24999108 PMCID: PMC4203306 DOI: 10.3791/51596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
The zebra finch (Taeniopygiaguttata) has become an increasingly important model organism in many areas of research including toxicology, behavior, and memory and learning. As the only songbird with a sequenced genome, the zebra finch has great potential for use in developmental studies; however, the early stages of zebra finch development have not been well studied. Lack of research in zebra finch development can be attributed to the difficulty of dissecting the small egg and embryo. The following dissection method minimizes embryonic tissue damage, which allows for investigation of morphology and gene expression at all stages of embryonic development. This permits both bright field and fluorescence quality imaging of embryos, use in molecular procedures such as in situ hybridization (ISH), cell proliferation assays, and RNA extraction for quantitative assays such as quantitative real-time PCR (qtRT-PCR). This technique allows investigators to study early stages of development that were previously difficult to access.
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Zhang R, Guo J, Wu F, Mu Y, Giesy JP, Chang H, Zhao X, Feng C. Toxicity reference values for polybrominated diphenyl ethers: risk assessment for predatory birds and mammals from two Chinese lakes. REVIEWS OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2014; 229:111-137. [PMID: 24515812 DOI: 10.1007/978-3-319-03777-6_6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
PBDEs are persistent organic pollutants, and have the capability to produce adverse effects on organisms. Aquatic piscivorous species at higher trophic levels have the greatest exposure risk. Information on the toxic potency of a commercial PBDE mixture, DE-71, to mink and American kestrel was reviewed, and dietary- and tissue-based TRVs were derived and evaluated for ecological risk assessment of aquatic piscivorous species inhabiting wetland areas in China. The effect on mink thyroid function was identified as the most appropriate and protective endpoint for deriving the TRV s for mammals. The TRV was based on dietary exposure, and wa s0.1 mg DE-71/kg (wm) or 0.01 mg DE-71/kg (bm)/day (ADI); for liver of mammals,the TRV was 1.2 mg LPBDEslkg (lm). For birds, reproductive effects on American kestrels were used to derive the TRVs, in which an overall UF of 3.0 was used. The TRV was based on dietary exposure, and was 0.1 mg DE-71/kg (wm) or 0.018 mg DE-71/kg (bm)/day (ADI); for eggs of birds, the TRV was 2.35 jlgLPBDEs/g (lm). Reported concentrations of PBDEs in livers of aquatic mammals found dead, and in fish and bird eggs from Chinese wetland areas were compiled and compared to the corresponding criteria values. Results indicated that TRV values reported in this study can be used as indicators for screening-level risk assessment of piscivorous species in Chinese aquatic systems. Furthermore, based on monitoring concentrations of PBDEs in fishes from two lakes (DCL and TL) in China and the dietary-based TRV of 0.1 mg DE-71/kg (wm), a screening-level risk assessment of PBDEs was performed for predatory birds and mammals. The results suggest that concentrations of PBDEs in these two areas would not be expected to cause any adverse effects on the local fish-eating wild birds and mammals.
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Affiliation(s)
- Ruiqing Zhang
- College of Environment and Resources, Inner Mongolia University, Huhhot, 010021, Inner Mongolia, China
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Currier HA, Letcher RJ, Williams TD, Elliott JE. An assessment of in ovo toxicity of the flame retardant 1,2-dibromo-4-(1,2-dibromoethyl) cyclohexane (TBECH) in the zebra finch. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2013; 91:455-459. [PMID: 23903759 DOI: 10.1007/s00128-013-1070-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Accepted: 07/18/2013] [Indexed: 06/02/2023]
Abstract
Embryonic toxicity of a brominated flame retardant, TBECH (1,2-dibromo-4-(1, 2-dibromoethyl) cyclohexane) was investigated using the zebra finch (Taeniopygia guttata) as our model. Using in ovo dosing procedures, we injected the technical TBECH compound, consisting of 50:50 α-/β-isomers, directly into the yolk of freshly laid eggs at concentrations of 2.3-94 ng/g egg. No significant effects were observed in terms of growth or survival for either pre-hatch embryos or post-hatch chicks. Analysis of tissue samples at various developmental stages suggests that α-/β-TBECH was metabolized rapidly, and thus is unlikely to cause any direct, long-term effects on the development of zebra finch embryos or offspring.
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Affiliation(s)
- Heidi A Currier
- Department of Biological Sciences, Simon Fraser University, 8888 University Dr., Burnaby, BC, V5A 1S6, Canada,
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Winter V, Williams TD, Elliott JE. A three-generational study of In ovo exposure to PBDE-99 in the zebra finch. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2013; 32:562-568. [PMID: 23258742 DOI: 10.1002/etc.2102] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2012] [Revised: 08/27/2012] [Accepted: 10/29/2012] [Indexed: 06/01/2023]
Abstract
Based on a literature review of avian data for polybrominated diphenyl ethers (PBDEs), ecologically relevant doses, low (10 ng/egg), medium (100 ng/egg), and high (1,000 ng/egg) of the 2,2',4,4',5-pentabromodiphenyl ether (BDE-99) congener along with dimethylsulfoxide (DMSO) control were injected into the yolk sac of un-incubated eggs of zebra finch, Taeniopygia guttata. Offspring development and adult phenotype were followed over three generations. No effects of in ovo PBDE exposure on hatching success, chick growth, thyroid hormone levels, or hematological traits were measured at sexual maturity (90 d posthatching). However, the authors did detect significant effects of BDE-99 treatment on adult phenotype of in ovo-exposed birds by breeding observations, in which clutch size was significantly smaller in all PBDE-dosed birds (low, medium, and high) compared with controls. A trend was also seen for longer laying intervals in PBDE-dosed birds (13-14 d) compared with control birds (8 d). In addition, a significant effect of PBDE was found on growth of the second-generation offspring of in ovo-treated females; body mass was significantly lower in the high-PBDE dosed birds compared with controls from hatch through to fledging (day 30). The authors found no evidence of effects over the longer term and in successive generations, whether in adult, reproductive phenotype of the second-generation offspring of in ovo-treated birds, or in the growth of their (third-generation) offspring. Their results suggest that egg levels as low as 10 ng/g BDE-99 may affect reproduction in small passerines by reducing clutch size.
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Affiliation(s)
- Viktoria Winter
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
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