Reproductive cycle of the South American scallop Amusium laurenti (Gmelin, 1791) (Bivalvia, Pectinidae).

PENCHASZADEH, P. E.; PAREDES, C.; SALAYA, J. J.

AQUACULTURE INTERNATIONAL

SPRINGER

Lugar: Berlin; Año: 2000 vol. 8 p. 227 - 235

0967-6120

Amusium laurenti is a functional hermaphrodite with well differentiated male andfemale gonadal areas. The gonadal index varies throughout the year with maximum valuesoccurring in January, March and July, and minimum ones in August and September. Partialspawning (with respect to the individual and the population) occurred from January to Februaryand March to May. The major spawning event coincided with the end of the period duringwhich bottom water temperature increased to temperatures above 26 C (July?August). Subsequentlytemperature decreased to 22 C, with a period of gonadal restoration and increasinggonadal index. Histological analysis of the gonads correlated with the gonadal index.