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首页> 外文期刊>Marine biology >Using growth band autofluorescence to investigate large-scale variation in growth of the abalone Haliotis midae
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Using growth band autofluorescence to investigate large-scale variation in growth of the abalone Haliotis midae

机译：使用生长带自发荧光研究鲍鱼鲍氏鲍鱼生长的大规模变化

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Growth of the abalone, Haliotis midae, was investigated at Port Alfred, on the south coast of South Africa, using both new and established techniques. A new method for aging animals is described, which makes use of shell autofluorescence under UV light to visualise internal growth bands. The deposition of growth bands was validated using measurements from shells of known age and, at one site, comparing growth estimates to those from cohort analysis undertaken at the same site. The new technique is far less time consuming and labour intensive than previously described methods; it is also non-destructive and proved to have potential for the reliable and rapid assessment of growth in large-scale studies. Growth of H. midae was also investigated at nine other sites, incorporating the full distribution range of the species. Systematic geographic variation in growth was observed along the South African coastline. Statistically significant differences existed among sites in growth rates for animals < 4 years and between 4 and 6 years and in the mean maximum sizes attained. Generally, H. midae from the south/southeast coast were found to have faster growth rates, smaller mean maximum sizes and were assumed to attain sexual maturity (determined in previous studies) earlier than those along the southwest/west coast. The geographic differences in estimates of growth observed have significant implications for future modelling approaches and indicate that present national management strategies are not appropriate as they fail to take regional variability into account.
机译：使用新技术和成熟技术，在南非南海岸的阿尔弗雷德港对鲍鱼（鲍鱼）的生长进行了研究。描述了一种使动物衰老的新方法，该方法利用壳在紫外线下的自发荧光来可视化内部生长带。使用来自已知年龄的贝壳的测量值来验证生长带的沉积，并在一个地点将生长估计与在同一地点进行的队列分析进行比较。与先前描述的方法相比，新技术耗时少且劳动强度大。它也是非破坏性的，并被证明具有在大规模研究中可靠，快速地评估生长的潜力。还在其他九个地点调查了H. midae的生长，纳入了该物种的整个分布范围。沿南非海岸线观察到增长的系统地理变化。不同地点之间的统计学差异显着（<4岁和4至6岁之间的动物的生长速度）以及获得的平均最大尺寸。通常，发现东南/东南沿海的mid。H.的生长速度快，平均最大大小较小，并且被认为比西南/西南沿海的性早熟（在先前的研究中确定）。观察到的增长估计的地域差异对未来的建模方法具有重要意义，并表明当前的国家管理策略不适当，因为它们没有考虑到地区差异。

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