Assessing risks of invasion through gamete performance: farm Atlantic salmon sperm and eggs show equivalence in function, fertility, compatibility and competitiveness to wild Atlantic salmon.
Assessing risks of invasion through gamete performance: farm Atlantic salmon sperm and eggs show equivalence in function, fertility, compatibility and competitiveness to wild Atlantic salmon.
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DOI：
10.1111/eva.12148
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发表时间：
2014-04
影响因子：
4.1
通讯作者：
Gage MJ
中科院分区：
文献类型：
--
作者：
Yeates SE;Einum S;Fleming IA;Holt WV;Gage MJ
配子水平的适应（a）进化迅速，（B）对近亲繁殖和远系繁殖敏感，（c）对繁殖潜力有重要影响。我们将这种理解应用于逃逸的农场鲑鱼所带来的问题，并测量它们在野外繁殖的潜力。农场大西洋鲑鱼（萨尔莫salar）是对生物多样性的威胁，因为它们大量逃逸，可以渗入，稀释或破坏当地适应的野生基因库。在整条鱼水平上的实验发现，农场繁殖潜力很大，但与野生成年鱼相比，尤其是雄性繁殖潜力较差。在这里，我们使用在类似环境下饲养的鱼类，在模拟自然配子微环境的条件下，通过对农场与野生大西洋鲑鱼精子和卵子的形式、功能、繁殖力、相容性和竞争力进行详细的体外比较，评估了配子水平的生殖性能。环境条件。尽管选择性驯化和减少遗传多样性，我们发现在所有的农场鱼类配子性状与野生祖先菌株相比，功能等同。我们的研究结果确定了一个明确的威胁，农场鲑鱼繁殖与野生鱼类，因此鼓励进一步考虑使用三倍体农场品系与优化的水产养殖和鱼类福利的性状，因为三倍体鱼保持生殖不育后逃逸。
Adaptations at the gamete level (a) evolve quickly, (b) appear sensitive to inbreeding and outbreeding and (c) have important influences on potential to reproduce. We apply this understanding to problems posed by escaped farm salmon and measure their potential to reproduce in the wild. Farm Atlantic salmon (Salmo salar) are a threat to biodiversity, because they escape in large numbers and can introgress, dilute or disrupt locally adapted wild gene pools. Experiments at the whole fish level have found farm reproductive potential to be significant, but inferior compared to wild adults, especially for males. Here, we assess reproductive performance at the gamete level through detailed in vitro comparisons of the form, function, fertility, compatibility and competitiveness of farm versus wild Atlantic salmon sperm and eggs, in conditions mimicking the natural gametic microenvironment, using fish raised under similar environmental conditions. Despite selective domestication and reduced genetic diversity, we find functional equivalence in all farm fish gamete traits compared with their wild ancestral strain. Our results identify a clear threat of farm salmon reproduction with wild fish and therefore encourage further consideration of using triploid farm strains with optimized traits for aquaculture and fish welfare, as triploid fish remain reproductively sterile following escape.
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影响因子：
2
作者：
Gage, MJG;MacFarlane, C;Parker, GA
通讯作者：
Parker, GA
影响因子：
2
作者：
Einum, S;Fleming, IA
通讯作者：
Fleming, IA
影响因子：
3.3
作者：
Carr, JW;Anderson, JM;Dilworth, T
通讯作者：
Dilworth, T
影响因子：
4.5
作者：
GJEDREM, T;GJOEN, HM;GJERDE, B
通讯作者：
GJERDE, B
影响因子：
14.9
作者：
Aljanabi, SM;Martinez, I
通讯作者：
Martinez, I