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- Title
Evaluación del potencial reproductivo del chorito (Mytilus chilensis) de dos poblaciones naturales sometidas a diferentes temperaturas de acondicionamiento.
- Authors
Lagos, Luis; Uriarte, Iker; Yany, Gabriel
- Abstract
The reproductive cycles of Mytilus chilensis vary latitudinally. This species has reduced genetic and morphological differentiation due to its high potential for dispersal. Broodstocks from Yaldad Bay (Chiloé) and Zenteno Bay (Punta Arenas) were conditioned at 9 ± 0.5°C and 15 ± 0.5°C, and were fed a diet (1:1) of Isochrysis galbana and Chaetoceros neogracile. We expected to determine whether conditioning at different temperatures produces changes in the reproductive potential of the populations. Gonadal development was lowest in the broodstocks conditioned at 9°C, and highest in those conditioned at 15°C, from Chiloé. Fertility was greater in broodstocks from Yaldad than in those from Zenteno. Oocyte diameter was greater in broodstocks from Zenteno, and both populations showed larger diameters at 9°C. Neither the percentage of fertilized eggs nor the percentage of larvae hatching differed significantly between populations at either conditioning temperature. Therefore, it was not possible to establish differences in the reproductive potential of the populations under the conditions studied herein.
- Subjects
CHILE; MYTILUS edulis; MUSSELS; PHYSIOLOGICAL effects of temperature; LARVAE; ANIMAL morphology; MARINE invertebrate populations; REPRODUCTION
- Publication
Latin American Journal of Aquatic Research, 2012, Vol 40, Issue 2, p389
- ISSN
0718-560X
- Publication type
Article
- DOI
10.3856/vol40-issue2-fulltext-13