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首页> 外文期刊>Journal of Fish Biology >Age and growth of grey triggerfish Balistes capriscus from trans-Atlantic populations
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Age and growth of grey triggerfish Balistes capriscus from trans-Atlantic populations

机译：来自跨大西洋群体的灰色引发百分比栏杆Capriscus的年龄和成长

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Anthropogenic factors that negatively impact reef fishes can include changes in life-history patterns of fisheries-targeted species. Understanding these impacts on growth and population age structure is essential in the management of exploited populations of fishes. This is the first study to directly compare age and growth for a major fisheries species between east and west populations of a transatlantic reef fish. The main goal of this study was to document age and growth in grey triggerfish Balistes capriscus from coastal waters of Ghana in the Gulf of Guinea (GOG) and compare those with the previous growth studies from that region and with the western Atlantic population. A secondary objective of this study was to evaluate the use of otoliths to age triggerfish and to provide a preliminary comparison with spine-derived age estimates. The results obtained from this study provided an updated understanding of the growth and age structure of the eastern B. capriscus population in GOG. The authors documented that shifts in population attributes occurred for B. capriscus after its major decline in abundance. The differences in physical and biotic characteristics of the East and West Atlantic regions and the differences in collection methods of samples make direct comparisons of growth parameters difficult. Nonetheless, overall differences in maximum sizes and ages were apparent; the western Atlantic population had a larger maximum size and older maximum age. The authors also documented that sagittal otoliths can be used to provide age estimates for triggerfish species, and otoliths as an ageing structure had better between-reader precision compared to dorsal spines.
机译：对暗礁鱼类产生负面影响的人为因素可能包括渔业目标物种生活史模式的变化。了解这些对生长和种群年龄结构的影响对于管理已开发的鱼类种群至关重要。这是第一项直接比较跨大西洋暗礁鱼类东、西种群中主要渔业物种年龄和生长的研究。本研究的主要目的是记录几内亚湾（GOG）加纳沿海水域的灰三叉鱼（Balistes capriscus）的年龄和生长，并将其与该地区先前的生长研究以及西大西洋种群进行比较。本研究的第二个目的是评估耳石在三叉鱼年龄测定中的应用，并与脊柱得出的年龄估计值进行初步比较。从这项研究中获得的结果提供了对高格东部山羊B.种群生长和年龄结构的最新了解。作者记录了在其丰度大幅下降后，capriscus的种群属性发生了变化。东大西洋和西大西洋地区物理和生物特征的差异，以及样本采集方法的差异，使得直接比较生长参数变得困难。尽管如此，最大尺寸和年龄的总体差异是明显的；西大西洋种群的最大规模较大，最大年龄较大。作者还记录了矢状耳石可用于提供三叉鱼物种的年龄估计，与背棘相比，耳石作为一种老化结构具有更好的读取器间精确度。

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