Intersexual plasticity in aspects of the biology of the mudskipper Periophthalmus barbarus (Gobhdae) in the mangrove swamps of IMO Estuary, Nigeria

作     者：Mfon T. Udo (Department of Fisheries and Aquaculture University of Uyo, PMB 1017, Uyo Akwa Ibom State, Nigeria.) 

作者机构：Department of Fisheries and Aquaculture University of Uyo PMB 1017 Uyo Akwa Ibom State Nigeria 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2002年第14卷第1期

页      面：95-101页

核心收录：

学科分类：0710[理学-生物学] 07[理学] 09[农学] 0903[农学-农业资源与环境] 071002[理学-动物学] 0713[理学-生态学] 

主　　题：intersexual plasticity Periophthalmus barbarus mangrove swamp length weight relationship feeding intensity 

摘      要：Between April 1992 and March 1993, intersexual plasticity in aspects of the biology of the mudskipper, Periophthalmus barbarus was studied. Sex was differentiated on the basis of the genital papillae, it was broader in females than males. Sexually active females were slightly heavier than similarly sized males. Sex ratio was strongly female biased. Length weight relationship of the sexes was isometric. There was no significant difference in the feeding intensity of both sexes; uniformity was also apparent in diet breadth. There was no named sex based difference in hepatosometic index but condition index was higher in males than females. The uniformity in intersexual plasticity of *** is consequent upon homogeneity of the mangrove ecosystem, which can only be altered anthropogenically.