Affiliation:
1. Universidade Estadual de Santa Cruz, Brazil
Abstract
This study characterized the reproductive cycle of the stout razor clam Tagelus plebeius in the estuary of the Cachoeira River, Ilhéus, Bahia, northeastern Brazil. Samples of 20 animals per collection were taken biweekly from August 2005 to August 2006. The 480 specimens were measured on the antero-posterior axis (length) and then removed from the shell. After macroscopic analysis, the gonads were fixed in Davidson's solution, processed by routine histology and stained by Harris hematoxylin and eosin. The gonads of both males and females appeared milky white, without sexual dimorphism. Microscopic analyses indicated a M: F ratio of 1.06: 1 and continuous reproduction of T. plebeius in the region. The period from August to October showed the most intense spawning. This study provides another example of continuous reproduction of bivalves in tropical waters, and because this species is a heavily exploited fishery resource in the region, it draws attention to the need for a management plan aimed at reducing harvests.
Subject
General Agricultural and Biological Sciences
Reference26 articles.
1. Ciclo Reprodutivo de Anomalocardia brasiliana (Gmelin, 1791) (Mollusca, Bivalvia, Veneridae) na Praia do Canto da Barra, Fortim, Ceará, Brasil;BARREIRA CAR;Boletim do Instituto de Pesca,2005
2. Aspectos Reprodutivos e Dinâmica Populacional de Chione pubera (Bory Saint-Vincent) (Bivalvia, Veneridae) no Sul do Brasil;BORZONE CA;Revista Brasileira de Zoologia,2001
3. Hermaphroditism among dioecious Tagelus plebeius (Lightfoot, 1786) (Mollusca, Psammobiidae) and Iphigenia brasiliana (Lamarck, 1818) (Mollusca, Donacidae) on the Cachoeira River Estuary, Ilhéus, Bahia, Brazil;CEUTA LO;Brazilian Journal of Biology,2010
4. Reproductive cycle of the stout razor clam, Tagelus plebeius (Lightfoot, 1786), in the Mar Chiquita coastal lagoon, Argentina;CLEDÓN M;Journal of Shellfish Research,2004
5. Sexual differentiation in mollusks: I. Pelecypods;COE WR;The Quartely Review of Biology,1943
Cited by
12 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献