Ploidy effects on hatchery survival, deformities, and performance in Atlantic salmon (Salmo salar)
Ploidy effects on hatchery survival, deformities, and performance in Atlantic salmon (Salmo salar)
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DOI：
10.1016/j.aquaculture.2010.11.029
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发表时间：
2011-05-01
期刊：
影响因子：
4.5
通讯作者：
Migaud, H.
中科院分区：
文献类型：
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作者：
Taylor, J. F.;Preston, A. C.;Migaud, H.
不育三倍体大西洋鲑鱼（Salmo salar）的生产可能有助于解决该行业日益增加的压力，以减少养殖逃逸鱼和野生鱼类种群之间的潜在繁殖。然而，之前的许多研究都观察到三倍体种群在海上的表现较差（生长、存活和畸形）。这可能是由于早期孵化场表现不佳和亲代效应强烈所致。因此，在本研究中，创建了两年级（2007 年和 2008 年）的混合性别鱼（10 只雄性：10 只雌性）来检查倍性相互作用对孵化场性能的影响。受精时，卵子批次被分成两部分，其中一组受到静水压力冲击以诱导三倍体。通过红细胞核长度测量验证，所有组的三倍体率均为 100%。倍性之间的孵化存活率没有差异。然而，发现存活率降低与配子质量密切相关。在孵化阶段，倍性显着影响孵化时的大小，二倍体通常大于三倍体。二倍体相对于三倍体的生长优势仅在首次喂养后 6 周内保持，三倍体在孵化阶段结束时通常会超过其二倍体兄弟姐妹。第一喂养阶段的畸形发生率普遍较低（平均
The production of sterile triploid Atlantic salmon (Salmo salar) may help address the increasing pressure on the industry to reduce potential breeding between farmed escapees and wild fish populations. However, many previous studies have observed poor performance at sea in triploid stocks (growth, survival, and deformity). This may result from poor early hatchery performance and a strong parental effect. Therefore, in the present study, two year classes (2007 and 2008) of mixed sex fish were created (10 males:10 females) to examine ploidy interactions on hatchery performance. Egg batches were divided in two at fertilisation with one group subjected to a hydrostatic pressure shock to induce triploidy. Triploid rate was confirmed at 100% in all groups, verified by red blood cell nucleus length measurements. Survival to hatch did not differ between ploidy. However, reduced survival was found to strongly correlate with gamete quality. During the hatchery phase ploidy significantly affected size at hatch, with diploids generally larger than triploids. Growth advantage of diploids over triploids was only maintained for 6 weeks post-first feeding, with triploids generally out-growing their diploid siblings by the end of the hatchery phase. Deformity prevalence in first feeding stages was generally low (mean