SEROTONIN-INDUCED PARTURITION IN THE FINGERNAIL CLAM SPHAERIUM (MUSCULIUM) TRANSVERSUM (SAY)

被引：23

作者：

FONG, PP

WARNER, M

机构：

[1] Department of Biology, Gettysburg College, Gettysburg, Pennsylvania

来源：

JOURNAL OF EXPERIMENTAL ZOOLOGY | 1995年 / 272卷 / 02期

关键词：

D O I：

10.1002/jez.1402720211

中图分类号：

Q95 [动物学];

学科分类号：

071002 ;

摘要：

Parturition in the freshwater fingernail clam Sphaerium (=Musculium) transversum (Say) was induced by external application of both 10(-4) and 10(-3) M serotonin [5-hydroxytryptamine (5-HT)]. 5-HT induced release of viable juveniles within 30-60 min of application. Parturitions in 5-HT (10(-3) M) occurred sooner and more often than in 5-KT (10(-5) or 10(-4) M) or in artificial pond water. The numbers of juveniles per parturition in 5-HT varied from one to nine. The parturition response to 5-HT was completely blocked by 10(-4) M methiothepin (a vertebrate 5-HT1/5-HT2 receptor antagonist) known to bind with high affinity to gastropod 5-KT receptors and to black 6-HT-induced spawning in other freshwater bivalves. However, parturition was not induced by 8-OH-DPAT (8-hydroxy-dipropylaminotetralin HBr, a vertebrate 5-HT1A receptor agonist), a potent inducer of spawning in freshwater bivalves. Thus, the pharmacological profile of the 5-HT receptor(s) mediating parturition in S. transversum may be unlike that mediating spawning in other bivalves. This is the first report of 5-HT-induced parturition in any brooding bivalve. (C) 1995 Wiley-Liss, Inc.

引用

页码：163 / 166

页数：4

共 28 条

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