Describing morphological and enzyme polymorphism in the Ribbed Venus Clam Gafrarium tumidum from five marine coastal locations in Mindanao, Philippines.

作者：Rachel Leong, C. A. de la Seña, M. A. J. Torres, Cesar G. Demayo · 发表于：Aquaculture, Aquarium, Conservation & Legislation · 年份：2013 · 被引用次数：2 · 研究领域：Isotope Analysis in Ecology、Aquatic Invertebrate Ecology and Behavior、Marine Biology and Ecology Research

This study was conducted to describe morphological variations and enzyme polymorphism in the Ribbed Venus Clam Gafrarium tumidum from five marine coastal locations in Mindanao, Philippines. Thirteen morphological characters and two enzymes were evaluated following standard methods of morphological measurements and enzyme pattern analysis. Results show variations in selected morphological characters and in the two enzyme loci among the populations examined. Enzyme polymorphism and the high heterozygosity in the populations examined can be attributed to the external fertilization and extended dispersal of planktonic larvae of this bivalve species. Factors such as heterozygote advantage during larval life, and the minimal effects if any of human exploitation can also be considered to explain the high heterozygote frequencies. Since only a few loci were investigated, it was postulated that the results may be different if a higher number of loci would be included in the evaluation of genetic variation in this species.