Reproductive Impact of Environmental Chemicals on Animals

Kanda, Rakesh

doi:10.1007/978-3-030-23633-5_3

Cited by 13 publications

(3 citation statements)

References 99 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A recent assessment of global fish diversity ( Miranda et al, 2022 ) estimated that the number of recognised fish species is now over 36,000, of which about 20,000 are regarded as being under some level of threat. Significantly this assessment showed that freshwater fishes are more vulnerable than marine species to the impacts of pollution, much of which is attributable (among other reasons) to contamination from agriculture, mining effluents containing heavy metals, pesticides, chemicals involved in the manufacture of both plastics and cosmetics, as well as the release of human sewage with its content of endocrine disrupting chemicals ( Kanda, 2019 , Marlatt et al, 2022 ) and pharmaceuticals ( Sanderson et al, 2004 ). Many of these chemicals are known for their undesirable impacts on embryonic development in wild species and impaired reproductive functions, not only in fishes ( Tyler and Jobling, 2008 ), but also in birds, reptiles, amphibians and many marine crustaceans ( Beyer et al, 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Biobanks, offspring fitness and the influence of developmental plasticity in conservation biology

Holt

2023

Anim. Reprod.

View full text Add to dashboard Cite

Mitigation of the widely known threats to the world's biodiversity is difficult, despite the strategies and actions proposed by international agreements such as the United Nations Framework Convention on Climate Change (UNFCCC) and the Convention on Biological Diversity (CBD). Nevertheless, many scientists devote their time and effort to finding and implementing various solutions to the problem. One potential way forward that is gaining popularity involves the establishment of biobank programs aimed at preserving and storing germplasm from threatened species, and then using it to support the future viability and health of threatened populations. This involves developing and using assisted reproductive technologies to achieve their goals. Despite considerable advances in the effectiveness of reproductive technologies, differences between the reproductive behavior and physiology of widely differing taxonomic groups mean that this approach cannot be applied with equal success to many species. Moreover, evidence that epigenetic influences and developmental plasticity, whereby it is now understood that embryonic development, and subsequent health in later life, can be affected by peri-conceptional environmental conditions, is raising the possibility that cryopreservation methods themselves may have to be reviewed and revised when planning the biobanks. Here, I describe the benefits and problems associated with germplasm biobanking across various species, but also offer some realistic assessments of current progress and applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Biobanks, offspring fitness and the influence of developmental plasticity in conservation biology

Holt

2023

Anim. Reprod.

View full text Add to dashboard Cite

show abstract

“…It may remain in the soil up to 4 years and might be washed to rivers or leached to groundwater where it degrades slowly (U.S. Environmental Protection Agency 2007). There are various reports of the effects of EDCs on wildlife, especially in freshwater ecosystems, such as abnormal development and death of embryos (Arukwe et al 2016;Ortiz-Villanueva et al 2018), changes in sexual behaviour (Kanda 2019), feminization of male animals (Carnevali et al 2018) and altered immune functions (Nowak et al 2019). The effects of EDCs had also been recorded in birds, especially those feeding in polluted waters (Roman et al 2019;Jessl et al 2018) and may ultimately lead to loss of biodiversity.…”

Section: Introductionmentioning

confidence: 99%

Occurrence of selected endocrine disrupting compounds in the eastern cape province of South Africa

Farounbi

Ngqwala

2020

Environ Sci Pollut Res

View full text Add to dashboard Cite

Endocrine-disrupting compounds are attracting attention worldwide because of their effects on living things in the environment. Ten endocrine disrupting compounds: 4-nonylphenol, 2,4-dichlorophenol, estrone, 17β-estradiol, bisphenol A, 4-tertoctylphenol, triclosan, atrazine, imidazole and 1,2,4-triazole were investigated in four rivers and wastewater treatment plants in this study. Rivers were sampled at upstream, midstream and downstream reaches, while the influent and effluent samples of wastewater were collected from treatment plants near the receiving rivers. Sample waters were freeze-dried followed by extraction of the organic content and purification by solid-phase extraction. Concentrations of the compounds in the samples were determined with ultra-high performance liquid chromatography-tandem mass spectrometry. The instrument was operated in the positive electrospray ionization (ESI) mode. The results showed that these compounds are present in the samples with nonylphenol > dichlorophenol > bisphenol A > triclosan > octylphenol > imidazole > atrazine > triazole > estrone > estradiol. Nonylphenol has its highest concentration of 6.72 μg/L in King Williams Town wastewater influent and 2.55 μg/L in midstream Bloukrans River. Dichlorophenol has its highest concentration in Alice wastewater influent with 2.20 μg/L, while it was 0.737 μg/L in midstream Bloukrans River. Uitenhage wastewater effluent has bisphenol A concentration of 1.684 μg/L while it was 0.477 μg/L in the downstream samples of the Bloukrans River. Generally, the upstream samples of the rivers had lesser concentrations of the compounds. The wastewater treatment plants were not able to achieve total removal of the compounds in the wastewater while runoffs and wastes dump from the cities contributed to the concentrations of the compounds in the rivers.

show abstract

“…The driving aim of this work was to investigate whether features or morphology/physiology in adult frogs could predict reproductive outcomes in those frogs, including under exposure conditions. Anti-androgenic chemicals are particularly relevant for effects on male reproductive success [34] and are commonly found to induce effects at environmentally relevant concentrations [35]. In this work we were seeking to identify features associated with male reproductive success in a laboratory model species as a first step towards the development of reliable biomarker(s) of reproductive health with potential for application to wild anurans.…”

Section: Introductionmentioning

confidence: 99%

A laboratory investigation into features of morphology and physiology for their potential to predict reproductive success in male frogs

et al. 2020

View full text Add to dashboard Cite

Amphibian populations are declining globally, however, the contribution of reduced reproduction to declines is unknown. We investigated associations between morphological (weight/snout-vent length, nuptial pad colour/size, forelimb width/size) and physiological (nuptial pad/testis histomorphology, plasma hormones, gene expression) features with reproductive success in males as measured by amplexus success and fertility rate (% eggs fertilised) in laboratory maintained Silurana/Xenopus tropicalis. We explored the robustness of these features to predict amplexus success/fertility rate by investigating these associations within a sub-set of frogs exposed to anti-androgens (flutamide (50 μg/L)/linuron (9 or 45 μg/L)). In unexposed males, nuptial pad features (size/colour/number of hooks/androgen receptor mRNA) were positively associated with amplexus success, but not with fertility rate. In exposed males, many of the associations with amplexus success differed from untreated animals (they were either reversed or absent). In the exposed males forelimb width/nuptial pad morphology were also associated with fertility rate. However, a more darkly coloured nuptial pad was positively associated with amplexus success across all groups and was indicative of androgen status. Our findings demonstrate the central role for nuptial pad morphology in reproductive success in S. tropicalis, however, the lack of concordance between unexposed/exposed frogs complicates understanding of the utility of features of nuptial pad morphology as biomarkers in wild populations. In conclusion, our work has indicated that nuptial pad and forelimb morphology have potential for development as biomarkers of reproductive health in wild anurans, however, further research is needed to establish this.

show abstract

Reproductive Impact of Environmental Chemicals on Animals

Cited by 13 publications

References 99 publications

Biobanks, offspring fitness and the influence of developmental plasticity in conservation biology

Biobanks, offspring fitness and the influence of developmental plasticity in conservation biology

Occurrence of selected endocrine disrupting compounds in the eastern cape province of South Africa

A laboratory investigation into features of morphology and physiology for their potential to predict reproductive success in male frogs

Contact Info

Product

Resources

About