EFFECTS OF DIFFERENT TOXICANTS ON REPRODCUCTION OF DIFFERENT FISH Exposure to environmental estrogenic alkyl phenolic chemicals in rainbow trout resulted in a decreased fertility and egg production in females, reduction of gonadal size (Jobling
ثبت نشده
چکیده
Exposure to environmental estrogenic alkyl phenolic chemicals in rainbow trout resulted in a decreased fertility and egg production in females, reduction of gonadal size (Jobling et al., 1996; Ashfield et al., 1998), reduced sperm production and demasculinisation of genetic male Japanese medaka, intersex gonads (Nimrod and Benson, 1998; Gimeno et al., 1998) etc. Another frequently observed effect of exposure to environmental estrogens is the induction of the yolk precursor protein vitellogenin (VTG) in male and sexually immature fish (Jobling et al., 1996; Folmar et al., 1996).
منابع مشابه
Comparative responses of molluscs and fish to environmental estrogens and an estrogenic effluent.
It is now well established that there is a diverse array of chemical discharged into the environment that can mimic or antagonise the action of hormones. These endocrine-disrupting chemicals (EDCs) can thus interact with physiological systems and cause alterations in development, growth and reproduction in wildlife that are exposed to them. As yet, however, there is little information on the re...
متن کاملOptimization of UV irradiation for production of gynogenetic rainbow trout, Oncorhynchus mykiss: emphasising Hertwig effect and photoreactivation
Abstract: The optimum dose of UV irradiation to produce gynogenesis rainbow trout, Oncorhynchus mykiss with emphasis of Hertwing effect and photoreactivation (PR) was investigated. For this purpose, the sperm of rainbow trout were inadiated with UV at 2010±200 µw.cm-2 intensity in different alternatives of 0, 1, 3, 5, 8, 10, 15, 20, 25, 35 and 45 minutes and allowed to ferti...
متن کاملHormonal sex reversal of rainbow trout (Oncorhynchus mykiss) by ethynylestradiol-17α (EE2)
Rainbow trout (Oncorhynchus mykiss) females grow larger and mature later than males, making all-female stocks economically advantageous. The objective of this research was to develop methods for the production of monosex populations of trout through the use of sex steroids. The synthetic estrogen ethynylestradiol-17α (EE2) was administered in single period-immersion treatment of 400 µg/l for 1,...
متن کاملThe effects of short-term growth hormone (somatotropin) bath on some growth and immunity indices in the early stages of growth in rainbow trout (Oncorhynchus mykiss)
This study was conducted to determine the effect of growth hormone on some growth and immunity parameters at three stages of rainbow trout eyed egg, alvin and fry. The experiment was carried out in 4 treatments with concentrations of 0, 0.1, 0.5 and 1 mg/l of somatotropin hormone. For permeability, different experimental groups were treated with sodium hypochlorite (0.005 %) for 15 seconds befo...
متن کاملEffects of stock density on texture-colour quality and chemical composition of rainbow trout (Oncorhynchus mykiss)
This study describes the effects of different stocking densities on texture/colour characteristics, protein content /amino acid and lipid content/fatty acid composition of rainbow trout fillet. Stocking density was selected 5 (Group A), 15 (Group B), 25 (Group C) kg fish m−3. Tukey’s Multiple Comparison Test showed insignificant differences between measured size/weight measurement and condition f...
متن کامل