Latin american journal of aquatic research
On-line version ISSN 0718-560X
GARCIA, Ricardo M and WINKLER, Federico M. Association between shell color of breeds (Lamarck, 1819) and the survival, growth and larval development of their progenies. Lat. Am. J. Aquat. Res. [online]. 2012, vol.40, n.2, pp. 367-375. ISSN 0718-560X.
Marine bivalve mollusks are extremely diverse in shell color and pigmentation patterns. Such diversity is affected by environmental and genetic factors. Some evidences in adult marine bivalves shows that individuals with low-frequency shell colors have lower growth rates and/or higher mortalities than those with the most frequent shell colors. Knowing that Argopecten purpuratus shell color variation is under genetic control, in this work we test the hypothesis that loci that control shell color variation also affect larvae's growth rate, survival and/or development rate. Survival, growth and development rates were estimated in larvae produced in different crosses between brooders of A. purpuratus having low frequency shell colors (white or orange) and "normal" (brown) color. Results showed no significant differences in growth rates between larvae produced by crosses that involved brown shell parents, or orange by white parents. However, progenies of self fertilized orange and white parents showed significant differences in growth among them, and a lower growth rate than the remaining crosses. Results suggest that genes that control shell color variation in juvenile and adult A. purpuratus could affect the growth rates of their larvae, but not the development rate or survival.
Keywords : Argopecten purpuratus; northern scallop; pectinid; culture; larval development; color; Chile.