Abstract
Numerous studies are available reporting the effects of pesticides on reproductive activity in Indian fishes. The majority of these reports deals with histopathological changes in gonads and endocrine glands involved in the regulation of reproduction following treatment with different pesticides. Pesticides are reported to cause degenerative changes in gonads and arrest gametogenic processes either by acting directly on the gonads or by interfering with the secretory activity of the hypothalamo-hypophyseal-gonadal/thyroid axis that regulates various reproductive events. Secretion of hormones such as gonadotropin-releasing hormone (GnRH), gonadotropin, growth hormone, adrenocorticotropic hormone (ACTH), testosterone, estrogens, 17,20β-dihydroxyprogesterone and thyroid hormones are in general lowered, leading to cessation of gametogenesis, vitellogenesis, oocyte maturation, ovulation, spermiation, etc. Adverse effects of pesticides have also been demonstrated on fecundity, fertilization, hatching, and postembryonic development. The effects are highly variable and depend on the nature, dose, and mode of application of the pesticides.
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Lal, B. Pesticide—induced reproductive dysfunction in Indian fishes. Fish Physiol Biochem 33, 455–462 (2007). https://doi.org/10.1007/s10695-007-9171-4
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DOI: https://doi.org/10.1007/s10695-007-9171-4