Osmoregulation in the sheepshead minnow, Cyprinodon variegatus: Influence of a fluctuating salinity regime
Osmoregulation in the sheepshead minnow, Cyprinodon variegatus: Influence of a fluctuating salinity regime
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羊头鲦鱼（Cyprinodon variegatus）的渗透调节：盐度波动的影响
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
Dennis C. Haney
中科院分区：
文献类型：
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作者：
Dennis C. Haney
杂色鲤（学名：Cyprinodon variegatus）是一种生活在大西洋西部和墨西哥湾的常见沿海鱼类，可生活在0‰至140‰的环境盐度中。这项研究中的鱼类来自佛罗里达锡达基附近的墨西哥湾盐沼。本研究考察了C. variegatus调节血浆渗透压的影响下，循环盐度制度。C.的个体。在7种周期性盐度条件下，对杂色鳟进行了21 d的暴露试验。每个周期持续2d，盐度每天变化10‰ ~ 30‰。在实验过程中，在五个日期测定各组鱼的血浆渗透压。C. variegatus有效地调节血浆渗透压，即使当鱼类暴露于大的盐度波动。鱼以前暴露于大的盐度波动调节血浆渗透压比鱼，以前没有经历过变化或盐度变化小。盐度的增加比盐度的降低对鱼体的调节有更大的影响。
Cyprinodon variegatus (sheepshead minnow), a common coastal resident of the western Atlantic Ocean and Gulf of Mexico, can live in ambient salinities ranging from 0‰ to greater than 140‰. Fish in this study were obtained from a Gulf of Mexico salt marsh near Cedar Key, Florida. This study examined the ability of individual C. variegatus to regulate plasma osmolality under the influence of a cycling salinity regime. Individuals of C. variegatus were exposed for 21 d to one of seven cyclical salinity regimes. Each cycle lasted for 2 d, with salinity varied between 10‰ and 30‰ each day. Plasma osmolality of fish from each group was determined on five dates during the course of the experiment. C. variegatus efficiently regulated plasma osmolality, even when fishes were exposed to large fluctuations in salinity. Fish previously exposed to large salinity fluctuations regulated plasma osmolality better than fish that previously had experienced no change or small changes in salinity. Increasing salinity had a greater impact on osmoregulation than did decreasing salinity.