Spatial variability in the somatic growth of pikeperch Sander lucioperca , an invasive piscivorous fish
Spatial variability in the somatic growth of pikeperch
Sander lucioperca
, an invasive piscivorous fish
复制标题
入侵性食鱼梭鲈体细胞生长的空间变异
DOI：
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发表时间：
2018
影响因子：
1.8
通讯作者：
J. Britton
中科院分区：
文献类型：
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作者：
E. T. Nolan;J. Britton
引进的鱼类会产生入侵种群，影响本地物种和生态系统。因此，了解引进物种在其扩展范围内的种群生态，并将其与本地范围进行比较，对于告知其管理非常重要。本文分析了食鱼淡水鱼刺鲈在入侵和原生范围内的年龄和体细胞生长速率，以确定其空间格局和驱动因素。分析最初是在它们入侵的英格兰中部和西部地区完成的。种群的生长速度在空间上存在差异；在狭窄而浅的运河中，它们的速度是最慢的，而在大而淤积的低地河流中，它们的速度是最快的。对von Bertalanffy生长模型参数的meta分析表明，在其原生和入侵范围内，它们的理论极限长度（L∞）和生长系数(K)与纬度显著相关，而与经度无关。它们与纬度呈非线性关系，L∞值越高，K值越低，分布范围越北越南。在生长范围的中间（北纬45°至55°），生长速度明显更快，这表明这里的温度最适合生长，但最终长度却减少了。这些空间模式表明，虽然引入的lucioperca可以在广阔的区域内殖民新的水域，但它们的生活史特征的表达将在空间上发生变化，这可能会影响入侵种群如何建立并融入本地鱼类群落。
Introduced fishes can develop invasive populations that impact native species and ecosystems. Understanding the population ecology of introduced species in their extended ranges and how this compares to their native ranges is therefore important for informing their management. Here, the age and somatic growth rates of the piscivorous freshwater fish pikeperch Sander lucioperca were analysed across their invasive and native ranges to determine their spatial patterns and drivers. Analyses were initially completed in their invaded range in central and western England. Populations varied spatially in their growth rates; they were slowest for a population in a narrow and shallow canal, and fastest in a large, impounded lowland river. A meta-analysis of parameters of the von Bertalanffy growth model then revealed that across their native and invasive ranges, their theoretical ultimate lengths (L∞) and growth coefficients (K) were significantly related to latitude, but not longitude. Their relationships with latitude were non-linear, with higher values of L∞ and lower values of K being evident towards their northerly and southerly range limits. Faster growth rates were evident in the middle of their range (45 to 55 °N), suggesting temperatures here were most optimal for growth, but were in a trade-off with reduced ultimate lengths. These spatial patterns suggest that whilst introduced S. lucioperca can colonise new waters across a wide area, the expression of their life history traits will vary spatially, with potential implications for how invasive populations establish and integrate into native fish communities.