Reproductive cycle of the south American scallop Amusium laurenti (Gmelin, 1791) (Bivalvia, Pectinidae) |
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| Authors: | Pablo E Penchaszadeh Claudio Paredes Juan J Salaya |
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| Institution: | (1) Departamento deEstudios Ambientales, Universidad Simón Bolívar, Apartado 89000, Caracas, Venezuela;(2) Present address: Museo Argentino deCiencias Naturales-CONICET, Argentina;(3) Departamento deEstudios Ambientales, Universidad Simón Bolívar, Apartado 89000, Caracas, Venezuela;(4) Departamento deEstudios Ambientales, Universidad Simón Bolívar, Apartado 89000, Caracas, Venezuela |
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| Abstract: | Amusium laurenti is a functional hermaphroditewith well differentiated male and female gonadalareas. The gonadal index varies throughout the yearwith maximum values occurring in January, March andJuly, and minimum ones in August and September. Partial spawning (with respect to the individual andthe population) occurred from January to February andMarch to May. The major spawning event coincided withthe end of the period during which bottom watertemperature increased to temperatures above 26°C(July–August). Subsequently temperature decreased to22°C, with a period of gonadal restoration andincreasing gonadal index. Histological analysis ofthe gonads correlated with the gonadal index. |
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| Keywords: | Amusium gonadal index gonad histology Pectinidae reproductive cycle tropical scallop |
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