Influence of salinity on the distribution of Acartia tonsa (Copepoda, Calanoida)
Influence of salinity on the distribution of Acartia tonsa (Copepoda, Calanoida)
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DOI：
10.1016/s0022-0981(99)00023-4
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发表时间：
1999-06-01
影响因子：
2
通讯作者：
Pagano, M
中科院分区：
文献类型：
--
作者：
Cervetto, G;Gaudy, R;Pagano, M
calanoid桡足动物Acartia tonsa是法国马赛附近Berre泻湖中数量最多的桡足动物。该物种可以在广泛的环境中发现，因此应该能够在邻近的Fos湾地区定居。我们检验了Berre泻湖和Fos湾的盐度差异阻止了a.t onsa在后者的殖民化的假设。该物种对盐度变化的耐受程度是通过在长达一年的周期内采集样本进行的实验室实验来测试的。测试了其对不同渗透冲击的抵抗力，并确定了Berre泻湖tonsa种群的最佳盐度。这些实验证实了tonsa的全盐性，尽管已经证明，如果盐度的瞬时变化大于10-15‰，该物种的死亡率很高。还进行了其他补充实验，以确定该物种能够生存的最大和最小盐度值。最大盐度为72‰，最小盐度低于1‰。最佳的适应是在千分之15到千分之22之间。(C) 1999 Elsevier Science B.V.版权所有
The calanoid copepod Acartia tonsa is the most abundant copepod species in the Berre Lagoon near Marseilles, France. This species can be found in a wide range of environments and therefore should be capable of colonizing the neighboring region of the Gulf of Fos. We test the hypothesis that differences in salinity between the Berre Lagoon and the Gulf of Fos prevents colonization of the latter by A. tonsa. The degree of tolerance of this species for changes in salinity was tested through laboratory experiments carried out with samples taken during a year long cycle. Its resistance towards different kinds of osmotic shocks was tested, and the optimal salinity for the population of A. tonsa of the Berre Lagoon was determined. The euryhalinity of A. tonsa was confirmed with these experiments, although it was demonstrated that this species shows high mortalities if the instantaneous change in salinity is greater than 10-15 parts per thousand. Other complementary experiments were undertaken to define the maximum and minimum values of salinity on which this species could survive. The maximum salinity was 72 parts per thousand, and the minimum was lower than 1 parts per thousand. The optimal adaptation was found between 15 and 22 parts per thousand. (C) 1999 Elsevier Science B.V. All rights reserved.