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首页> 外文期刊>Journal of Fish Biology >Behavioural salinity preferences of juvenile green sturgeon Acipenser medirostris acclimated to fresh water and full-strength salt water
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Behavioural salinity preferences of juvenile green sturgeon Acipenser medirostris acclimated to fresh water and full-strength salt water

机译：绿green鱼对新鲜水和全强度盐水的适应行为盐度偏爱

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摘要

To quantify the salinity preference of juvenile green sturgeon Acipenser medirostris, two groups of A. medirostris [140days post hatch (dph); total length (LT) 38 center dot 052 center dot 5cm] were acclimated to either near fresh water (mean +/- s.e. salinity=3 center dot 2 +/- 0 center dot 6) or full-strength salt water (34 center dot 1 +/- 1 center dot 2) over 8weeks. Following acclimation, the two groups were divided into experimental and control groups, where experimental A. medirostris from both freshwater and saltwater acclimations were individually introduced (200220 dph) into a rectangular salinity-preference flume (maximum salinity gradient: 533). Control A. medirostris were presented with only their acclimation water (fresh water or salt water) on both sides of the flume. It was demonstrated that A. medirostris acclimated to both salt water and fresh water spent a significantly greater amount of time on the side of the testing area with the highest salinity concentration (P < 0 center dot 05 and P < 0 center dot 001, respectively) while control A. medirostris spent an equal amount of time on each side of the flume. These findings indicate that juvenile A. medirostris are not only capable of detecting salt water within the first year of their lives but perhaps are actively seeking out saline environments as they move through a watershed. Establishing A. medirostris salinity preferences provides a better understanding of the early life history of this threatened species, shedding light on possible outmigration timing.
机译：为了量化青绿色st鱼Acipenser medirostris的盐度偏好，两组A. medirostris [孵化后140天（dph）;总长度（LT）38个中心点052个中心点5厘米]适应了淡水附近（平均+/- se盐度= 3个中心点2 +/- 0个中心点6）或全强度盐水（34个中心点） 1 +/- 1个中心点2）超过8周。适应后，将两组分为实验组和对照组，分别将来自淡水和盐水适应的实验拟南芥（200220 dph）引入矩形盐度偏好的水槽（最大盐度梯度：533）。对照A. medirostris仅在水槽的两侧都呈现出驯化水（淡水或盐水）。事实证明，适应盐水和淡水的地中海曲霉在盐度浓度最高的测试区域一侧花费了大量的时间（分别为P <0中心点05和P <0中心点001）。 ），而对照A. medirostris在水槽的每一侧花费了相等的时间。这些发现表明，幼年曲霉不仅能够在其生命的第一年内检测到盐水，而且在流经分水岭时也许正在积极寻找盐分环境。建立地中海嗜盐杆菌的盐度偏好可以更好地了解这一受威胁物种的早期生活史，从而为可能的迁徙时机提供了线索。

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