当前位置： SCI文献检索 > GENERAL AND COMPARATIVE ENDOCRINOLOGY期刊下所有文献 > Natural variability and response interpretation of fecundity, vertebrate-like sex-steroid levels and energy status in the New Zealand mudsnail Potamopyrgus antipodarum (Gray).

Natural variability and response interpretation of fecundity, vertebrate-like sex-steroid levels and energy status in the New Zealand mudsnail Potamopyrgus antipodarum (Gray).

Abstract：

:Potamopyrgus antipodarum is a promising test organism that is often used in ecotoxicology, both in laboratory and field exposures. As no data are available on the physiological variation range of its life-traits and the biomarkers it uses, we studied the variation of fecundity, steroid levels and energy reserves over the course of a year in a field population. The reproductive cycle was described and showed seasonal activity during summer and autumn. Steroid levels (17β-estradiol and testosterone) varied significantly during the year and were correlated with the reproductive cycle, which suggested a potential role for sex-steroids in P. antipodarum reproduction. Energy status also showed seasonal variations. Triglycerides (TG) seemed to be the main energy lipid, whereas cholesterol appeared to be mostly used as a structural lipid. Proteins were also involved in the reproductive cycle, but only when TG were not sufficient to support the reproductive strain, similar to cholesterol. Glycogen seemed to be used as an early reserve. Threshold values under which no reproduction occurred were defined in starved snails. We proposed a range of variation in the measured parameters, allowing for a better understanding and interpretation of their levels during laboratory or in situ exposures. The data suggest that the variability of fecundity in snails has not been fully appreciated in literature.

journal_name

Gen Comp Endocrinol

journal_title

General and comparative endocrinology

authors

Gust M,Mouthon J,Queau H,Dussart C,Buronfosse T,Garric J

doi

10.1016/j.ygcen.2011.03.011

subject

Has Abstract

pub_date

2011-06-01 00:00:00

pages

243-50

issue

2

eissn

0016-6480

issn

1095-6840

pii

S0016-6480(11)00104-3

journal_volume

172

pub_type

杂志文章

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