Production and performance of larvae and spat of pure and hybrid species of Mytilus chilensis and M. galloprovincialis from laboratory crosses

Adult specimens of M. galloprovincialis from Concepcion Bay and M. chilensis from Yaldad Bay, Chile, were transferred to the laboratory to produce crosses of "pure" and "hybrid" species in order to evaluate early larval development and growth. These variables are important for un...

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Bibliographic Details
Published in:Latin american journal of aquatic research 2012-01, Vol.40 (1), p.243-247
Main Authors: Toro, Jorge E., Oyarzun, Pablo A., Penaloza, Carolina, Alcapan, Angelica, Videla, Viviana, Tilleria, Jorge, Astorga, Marcela, Martinez, Victor
Format: Article
Language:English
Subjects:
Marine
Mytilus chilensis
Mytilus galloprovincialis
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Summary:Adult specimens of M. galloprovincialis from Concepcion Bay and M. chilensis from Yaldad Bay, Chile, were transferred to the laboratory to produce crosses of "pure" and "hybrid" species in order to evaluate early larval development and growth. These variables are important for understanding the dynamics of these two mussel species in this potential hybrid zone where they occur sympatrically. The study showed that fertilization occurred in all crosses and significant differences were not detected between pure lines and hybrids in terms of the percentage of eggs that developed into larvae. Hybrid larvae and spat from both reciprocal crosses grew significantly more than those from pure lines, although valve length values were within the ranges reported in the literature.Original Abstract: Ejemplares adultos de M. galloprovincialis de la bahia de Concepcion y de M. chilensis de la bahia de Yaldad, Chile, se trasladaron al laboratorio para realizar cruzamientos puros de cada especie e hibridos, para evaluar el desarrollo larval temprano y su crecimiento. Estas variables son importantes para entender la dinamica de estas dos especies de mitilidos en esta potencial zona hibrida donde se encuentran en forma simpatrica. El estudio mostro que la fertilizacion ocurrio en todos los cruzamientos y no se detecto diferencias significativas entre lineas puras e hibridas en el porcentaje de huevos que se desarrollaron a larvas. Las larvas y juveniles hibridos de ambos cruzamientos reciprocos crecieron significativamente mas que las larvas de los cruzamientos de especies puras, aunque los valores de longitud de la valva estan dentro de los rangos reportados en la bibliografia.
ISSN:0718-560X
0718-560X
DOI:10.3856/vol40-issue1-fulltext-24