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首页> 外文期刊>Marine biology >Growth and survival differences among native, introduced and hybrid blue mussels (Mytilus spp.): genotype, environment and interaction effects
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Growth and survival differences among native, introduced and hybrid blue mussels (Mytilus spp.): genotype, environment and interaction effects

机译：原生，引进和杂交蓝贻贝（Mytilus spp。）之间的生长和生存差异：基因型，环境和相互作用的影响

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The Mytilus species complex consists of three closely related mussel species: Mytilus trossulus, Mytilus edulis, and Mytilus galloprovincialis, which are found globally in temperate intertidal waters. Introduction of one or more of these species have occurred world-wide via shipping and aquaculture. Stable hybrid zones have developed in areas where these species have come into contact, making the invasion process complex. On the east coast of Vancouver Island (VI), British Columbia (BC), Canada, the native (M. trossulus) and introduced species (M. edulis and M. galloprovincialis), as well as their hybrid offspring, occur sympatrically. This study used a common environment experiment to quantify growth and survival differences among native, introduced, and introgressed mussels on VI. Mussels were collected from an area of known hybridization and reared in cages from May to August 2006. The cages were deployed at a local site as well as a remote site (approximately 150 km apart), and the mussels were genotyped at two species-specific loci. Growth and survival, as fitness measures, were monitored: native, introduced, and introgressed individuals were compared between and within sites to determine whether growth and survival were independent of site and genotype. Overall, mussels reared at Quadra Island performed better than locally-reared mussels at Ladysmith. Specifically, introgressed mussels reared at Quadra Island performed better than all genotypes reared at Ladysmith, as well as better than native mussels reared at Quadra Island. Differences in survival and growth among the native, introduced and introgressed mussels may serve to explain the complex hybridization patterns and dynamics characteristic of the VI introgression zone.
机译：Mytilus物种复合体由三种紧密相关的贻贝物种组成：Mytilus trossulus，Mytilus edulis和Mytilus galloprovincialis，它们在温带潮间带水域中普遍存在。通过航运和水产养殖在世界范围内引入了其中一种或多种。在这些物种接触的区域已经形成了稳定的杂交区，使入侵过程变得复杂。在加拿大不列颠哥伦比亚省（BC）的温哥华岛（VI）的东海岸，本地种（M. trossulus）和引进种（M. edulis和M. galloprovincialis）以及它们的杂交后代同生。这项研究使用常见的环境实验来量化VI上的原生贻贝，引进贻贝和渗入贻贝之间的生长和生存差异。从2006年5月至2006年8月从已知杂交的地区收集贻贝，并在网箱中饲养。网箱既部署在本地站点，又部署在偏远站点（相距约150公里），并且对两种类型的贻贝进行基因分型位点。监测生长和存活作为适应性指标：比较站点之间和站点内的本地，引进和有个性的个体，以确定生长和生存是否独立于站点和基因型。总体而言，在Quadra岛饲养的贻贝比在Ladysmith养殖的当地贻贝表现更好。具体而言，在Quadra岛饲养的渗入贻贝比在Ladysmith饲养的所有基因型表现更好，也比在Quadra岛饲养的原生贻贝更好。原生贻贝，引进贻贝和渗水贻贝在存活和生长方面的差异可以解释VI渗水区的复杂杂交模式和动力学特征。

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