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http://krishi.icar.gov.in/jspui/handle/123456789/76450
Title: | Endocrine disruptors (EDs) in aquatic animals: Impacts on their reproduction and development. |
Other Titles: | Not Available |
Authors: | Sherly Tomy Subhendu.K.Otta T. Bhuvaneswari Ezhil Praveena |
ICAR Data Use Licennce: | http://krishi.icar.gov.in/PDF/ICAR_Data_Use_Licence.pdf |
Author's Affiliated institute: | ICAR::Central Institute of Brackishwater Aquaculture |
Published/ Complete Date: | 2012-12-01 |
Project Code: | Not Available |
Keywords: | Endocrine disruptors (EDs) Aquatic animals Reproduction Development |
Publisher: | Not Available |
Citation: | Not Available |
Series/Report no.: | Fishing Chimes Vol 32 No.9; |
Abstract/Description: | Endocrine in fishes, as in other aquatic Endocrine in fishes, as in other aquatic animals disrupt their health. As at present, the identification of endocrine disruptors in fishes continue to remain challenging. In this background, pointing out that a large proportion of potential endocrine disruptors end up in surface waters, the authors tell us that the surface waters in particular are vulnerable to their adverse effects, mostly to the larval and other developmental stages of fishes. In this context, they suggest certain measures, before taking appropriate management steps. Endocrine-disrupting chemicals (EDCs) or endocrine disruptors (EDs) ame exogenous substances that interfere with or mimic the production, release transport, action or alteration of natural body hormones responsible for the maintenance of homeostasis and the regulation of developmental processes (Tilson and Kavlock, 1997). Thus, EDs have the potential to disrupt several hormonally regulated physiological processes such as development, growth behavior, immunity, sexual differentiation or reproduction. Both vertebrates and invertebrates are susceptible to the action of EDs and it has now been demonstrated to occur in wildlife, particularly in aquatic species or in species that are connected to aquatic food chains such as fish-eating birds. The reproductive disruptions are also associated with decline in neuro-endocrine function, indicating the neuro-endocrine cells as a major target tissue of endocrine disruptors. In addition to vertebrates, EDs are reported to disrupt invertebrate endocrine systems, including development and reproductive function such as the Tributyltin-induced impo-sex in gastropods (Lima et al., 2011) and impaired moulting in arthropods (deFur, 2004). The limited evidenze for the action of EDs in invertebrates is partly due to the fact that their endocrine system is poorly understood compared to that of vertebrates. Mode of actions of endocrine disruption: Available information on endocrine disruption has been from basic studies of hormone regulated physiological processes such as growth, development, and reproduction. The EDs can mimic a hormone effect either by acting as a hormone agonist or antagonists. They may also act indirectly by interfering with hormone synthesis, degradation or transport. The modes of action of EDs are highly conserved among vertebrates (Vos et al., 2000) with their binding affinities comparable among species. Similar molecular action can be evoked by an ED in two species, but the physiological, morphological or biological responses can be different (Wilson et al., 2004). For example, exposure to xenoestrogen (estrogen mimicking compound) leads vitellogenin (Vg) induction in both to medaka and zebrafish. However, it induces intersex formation in the medaka but not in the zebrafish ( der Ven et al., 2003). In an organism. different types of chemicals cam produce similar endocrine disruption effects, while, on the other hand, a single ED may impact several biological systems within the same organism, complicating the detection and interpretation of biological effects |
Description: | Not Available |
ISSN: | Not Available |
Type(s) of content: | Article |
Sponsors: | Not Available |
Language: | English |
Name of Journal: | Not Available |
Volume No.: | 32 |
Page Number: | 46-47 |
Name of the Division/Regional Station: | Not Available |
Source, DOI or any other URL: | Not Available |
URI: | http://krishi.icar.gov.in/jspui/handle/123456789/76450 |
Appears in Collections: | FS-CIBA-Publication |
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