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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Effects of salinity on survival and plasma osmolarity of Totoaba macdonaldi eggs, larvae, and juveniles
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Effects of salinity on survival and plasma osmolarity of Totoaba macdonaldi eggs, larvae, and juveniles

机译：盐度对Totoaba macdonaldi卵，幼虫和幼鱼存活和血浆渗透压的影响

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摘要

Totoaba macdonaldi, an endemic fish from the Gulf of California, is currently considered an endangered species by the Mexican Federal Government since its bladder is a high-priced item in China's black market. Totoaba is considered the cause of extinction of the marine porpoise vaquita marina (Phocoena sinus) due to Illegal fishing. It inhabits the Colorado Delta River Marine Reserve, an area with very high productivity, biomass, species endemism, and a marine nursery.To explore its osmoregulatory capabilities, totoaba specimens were exposed to different salinity conditions (from 5 to 40 psu) under laboratory trials. Several developmental stages were tested (eggs, larvae, and juveniles), from which blood and water osmotic pressure (OP), survival, water and total ash content were evaluated, confirming the euryhaline behavior of juveniles. However, larval stages were very dependent on external media salinity concentration. The responses to salinity acclimation and shifts in survival recorded were closely related to its migratory strategy, which can have important ecological consequences.
机译：来自加利福尼亚湾的特有鱼类Totoaba macdonaldi，由于其膀胱是中国黑市上的高价商品，目前被墨西哥联邦政府视为濒临灭绝的物种。 Totoaba被认为是由于非法捕捞而使海豚海豚码头（Phocoena sinus）灭绝的原因。它居住在科罗拉多河三角洲海洋保护区，该地区的生产力，生物量，物种特有性和海洋育苗场非常高。为了探究其渗透调节能力，在实验室试验中，十足的Totoaba标本暴露于不同的盐度条件下（从5到40 psu） 。测试了几个发育阶段（蛋，幼虫和幼虫），从中评估了它们的血液和水的渗透压（OP），存活率，水和总灰分含量，证实了幼鱼的盐卤行为。但是，幼虫阶段非常依赖于外部培养基盐度浓度。记录的对盐分适应和生存变化的反应与其迁徙策略密切相关，这可能产生重要的生态后果。

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