Oestrogens have no hormonal effect on the development and reproduction of the harpacticoid copepod Nitocra spinipes.
作者： M. Breitholtz , B.-E. Bengtsson
DOI: 10.1016/S0025-326X(01)00046-7
关键词: Copepod 、 Diethylstilbestrol 、 Fecundity 、 Internal medicine 、 Sex ratio 、 Reproduction 、 Endocrine disruptor 、 Endocrinology 、 Biology 、 Larva 、 Zoology 、 Crustacean
摘要: In recent years, reports have described endocrine-disruptive effects of environmental oestrogens in fish, but little is known about similar crustaceans. The objective the present study was therefore to examine whether 17-β-oestradiol, 17-α-ethynylestradiol and diethylstilbestrol (DES), could affect mortality, larval development rate, fecundity sex ratio sexually reproducing harpacticoid copepod Nitocra spinipes. Newly released nauplii (<24-h old) were exposed 1/1000, 1/100 1/10 (nominal concentrations) each oestrogen's 96 h-LC50 value for ≤18 days at 22±1°C. percentage gravid females number developed copepodites both reduced 0.03 mg l−1 DES, although latter response not significant. None other two induced any measurable effects. Since only observed significant appeared a DES concentration no more than 10 times below value, there evidence activity N. spinipes oestrogens.
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