Ion composition and osmolarity of Caspian Sea ctenophore, Mnemiopsis leidyi, in different salinities

被引：9
|
作者：
Foshtomi, Maryam Yazdani [1 ]
Abtahi, Behrooz [1 ]
Sari, Abas Esmaili [1 ]
Taheri, Mehrshad [1 ]
机构：
[1] Tarbiat Modares Univ, Fac Marine Sci, Iranian Natl Ctr Oceanog, CORS, Tehran, Iran
来源：
JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY | 2007年 / 352卷 / 01期
关键词：
Caspian Sea; ion composition; Mnemiopsis leidyi; osmolarity; salinity;
D O I：
10.1016/j.jembe.2007.06.029
中图分类号：
Q14 [生态学（生物生态学）];
学科分类号：
071012 ; 0713 ;
摘要：
The aim was to study osmotic and ionic regulation in alien ctenophore, Mnemiopsis leidyi (total length of 1.5-3 cm), acclimated gradually to artificial sea water of different salinities (8, 13, 18 and 23 ppt) in laboratory conditions (24 +/- 2 degrees C) with the salt composition and proportion of the Caspian Sea. Results showed that this species is hyper-osmoconformer (maintaining internal osmolarity 2-22 mOsmol l(-1) above external) in non-lethal salinities ranging from 8 to 23 ppt. The results of ionic regulatory investigations revealed that this species can regulate Ca2+ and SO42- so that the concentration of Ca2+ in the internal fluid and SO42- in the external fluid were significantly more in 8 and 13 ppt, respectively. No regulation was observed about other ions such as Cl-, Mg2+ and K+ in the mentioned salinities. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：28 / 34
页数：7
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