Bivalve aquaculture is an important component of the economy in eastern Canada. Because of current social, environmental, economic, and resource constraints, offshore mussel cultivation seems to be a promising strategy. With the objective of optimizing farming strategies that support the sustainability and development of the mussel industry at a microgeographic scale, we evaluated, after a traditional two year production cycle, the commercial performance of spat from several mussel (Mytilus edulis) stocks originating from sites separated by less than 65 km and cultivated at two different grow-out sites (shallow lagoon and offshore waters). The spatiotemporal variation in spat performance was studied through a multiyear in situ “stock-site” spat transfer design. The spat supply originating from the Bassin du Havre-Aubert lagoon systematically exhibited a larger size at sleeving time when compared to other stocks, and a better productivity level when harvested. Nevertheless, an alternative strategy would be to collect spat from the Havre-aux-Maisons lagoon, mostly because of the important commercial volumes of spat that can be collected there. Commercial performance (net income) was three times higher in the deep offshore grow-out site than in the shallow lagoon site. This better productivity in the open sea confirms the highly valuable strategy of offshore mussel farming in this area, where it was hypothesized that the less stressful environmental conditions positively influence reproduction, survival, and growth trends.

中文翻译：

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微观规模的蓝贻贝（Mytilus edulis，L.）股票的商业表现

双壳类水产养殖是加拿大东部经济的重要组成部分。由于当前的社会，环境，经济和资源限制，近海贻贝养殖似乎是一种有前途的策略。为了优化养殖策略以在微观地理范围内支持贻贝产业的可持续性和发展，我们在传统的两年生产周期后，评估了源自不同地点的几种贻贝（Mytilus edulis）种群的spa的商业绩效距不到65公里，并在两个不同的养殖场（浅泻湖和近海）养殖。通过多年的原位“库房”式随地吐痰设计，研究了随地吐痰性能的时空变化。与其他种群相比，源于巴生杜阿弗尔-奥伯特泻湖的鲑鱼在袖子上系统地展现出更大的大小，收获时的生产率更高。尽管如此，一种替代策略是从哈弗尔·奥·梅森斯泻湖中收集鱼卵，这主要是因为可以在那里收集大量的鱼卵。深海近海养殖场的商业业绩（净收入）比浅泻湖场高三倍。在公海提高生产力证明了该地区近海贻贝养殖的高度有价值的策略，据推测，压力较小的环境条件对繁殖，生存和增长趋势产生积极影响。收获时的生产率更高。尽管如此，一种替代策略是从哈弗尔·奥·梅森斯泻湖中收集鱼卵，这主要是因为可以在那里收集大量的鱼卵。深海近海养殖场的商业业绩（净收入）比浅泻湖场高三倍。在公海提高生产力，证实了该地区近海贻贝养殖的高度有价值的战略，据推测，压力较小的环境条件对繁殖，生存和增长趋势产生积极影响。收获时的生产率更高。尽管如此，一种替代策略是从哈弗尔·奥·梅森斯泻湖中收集鱼卵，这主要是因为可以在那里收集大量的鱼卵。深海近海养殖场的商业业绩（净收入）比浅泻湖场高三倍。在公海提高生产力，证实了该地区近海贻贝养殖的高度有价值的战略，据推测，压力较小的环境条件对繁殖，生存和增长趋势产生积极影响。深海近海养殖场的商业业绩（净收入）是浅泻湖场的三倍。在公海提高生产力证明了该地区近海贻贝养殖的高度有价值的策略，据推测，压力较小的环境条件对繁殖，生存和增长趋势产生积极影响。深海近海养殖场的商业业绩（净收入）比浅泻湖场高三倍。在公海提高生产力，证实了该地区近海贻贝养殖的高度有价值的战略，据推测，压力较小的环境条件对繁殖，生存和增长趋势产生积极影响。