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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >A comparison of the stock structures of two exploited demersal teleosts, employing complementary methods of otolith element analysis
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A comparison of the stock structures of two exploited demersal teleosts, employing complementary methods of otolith element analysis

机译：使用耳石元素分析的补充方法比较两种利用的硬骨鱼类的种群结构

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摘要

Complementary methods of otolith element analysis (IRMS of stable isotopes and laser ablation ICP-MS of trace elements) were used to elucidate the stock structures in Western Australia of the exploited demersal West Australian dhufish Glaucosoma hebraicum and Snapper Pagrus auratus. Residency of adults during their most recent part of life and the existence of important nursery locations were investigated by analysing otolith margins and cores, respectively, to evaluate the applicability of current spatial management. Stable oxygen isotope ratios (~(18)O/~(16)O) in both margins and cores of G. hebraicum otoliths increased with latitude and thus decreasing mean annual water temperature. Analyses of δ~(18)O, stable isotope composition (SI; δ~(18)O, δ~(13)C) and trace element composition (TE; ~(25)Mg, ~(88)Sr, ~(138)Ba) in otolith margins of C. hebraicum from four management areas on the west coast of Australia indicated that adults were resident in each area. Analyses of elements in otolith cores demonstrated that, by the early juvenile stage (<1 year old), individuals will have recruited to the area where they will remain as adults. Analyses of δ~(18)O and both SI and TE compositions in otolith margins of adult P. auratus indicated residency within each of three large bioregions (Gascoyne, GCB; West, WCB; South, SCB) along the west and south coasts of western Australia. As for G. hebraicum, the data also demonstrated residency at the finer scale, i.e. within the four management areas on the west coast. The lack of a conspicuous pattern in δ~(18)O levels in P. auratus otolith cores implied that adults in each area recruited from a range of nurseries. Although both SI and TE composition demonstrated that there was substantial self-recruitment within the WCB and SCB and within two of the four areas of the WCB, stock(s) of P. auratus at the southern extent of the GCB are likely to be partially reliant on immigration. Elemental signatures in otoliths of G. hebraicum and P. auratus demonstrated that adults in each management area of the WCB could be treated as separate stocks. However, while recruitment of juvenile G. hebraicum to adult stocks would occur primarily from adjacent multiple nurseries within areas of the WCB, adult P. auratus in any one bioregion and at least two of the four areas within the WCB were derived from a range of nurseries, including across area and bioregion boundaries.
机译：耳石元素分析的补充方法（稳定同位素的IRMS和痕量元素的激光烧蚀ICP-MS ICP）用于阐明西澳大利亚深海金枪鱼Glaucosoma hebraicum和鲷鱼Pagrus auratus开采后在西澳大利亚的种群结构。通过分析耳石边缘和核心，分别调查了成年人最近一生的居住地和重要苗圃位置的存在，以评估当前空间管理的适用性。 G. hebraicum otoliths的边缘和核心的稳定氧同位素比率（〜（18）O /〜（16）O）随着纬度的增加而增加，因此降低了年平均水温。 δ〜（18）O，稳定同位素组成（SI;δ〜（18）O，δ〜（13）C）和微量元素组成（TE;〜（25）Mg，〜（88）Sr，〜（ 138）Ba）位于澳大利亚西海岸四个管理区的希伯氏梭菌的耳石边缘，表明成年人居住在每个区域。对耳石核心中元素的分析表明，到少年早期（<1岁），个人将被招募到成年后仍居住的地区。对成年P. auratus耳石边缘的δ〜（18）O以及SI和TE组成的分析表明，它们分别位于西海岸和南海岸的三个大型生物区（Gascoyne，GCB； West，WCB； South，SCB）中。澳大利亚西部。至于希伯利亚油菜（G. hebraicum），数据还显示出较小规模的居住权，即在西海岸的四个管理区内。 a鱼耳石核中δ〜（18）O水平缺乏明显的规律，这意味着每个地区的成年人都从一系列苗圃中招募。尽管SI和TE的组成都表明WCB和SCB以及WCB四个区域中的两个区域都有大量的自我招募，但在GCB南部范围内的金黄色假单胞菌种群可能部分依靠移民。 G. hebraicum和A. auratus耳石中的元素签名表明，WCB每个管理区域中的成年动物都可以作为独立种群对待。但是，虽然将幼年G. hebraicum招募到成年种群的活动主要来自WCB区域内的相邻多个苗圃，但任何一个生物区域内的成年P. auratus和WCB的四个区域中至少有两个来自一系列托儿所，包括跨区域和生物区域边界。

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    D.V. Fairclough; J.S. Edmonds; G. Jackson; R.C.J. Lenanton; J. Kemp; B.W. Molony; I.S. Keay; B.M. Crisafulli; C.B. Wakefield;

  • 作者单位

    Western Australian Fisheries and Marine Research Laboratories, Department of Fisheries, Government of Western Australia, P.O. Box 20, North Beach, Western Australia 6920, Australia;

    Western Australian Fisheries and Marine Research Laboratories, Department of Fisheries, Government of Western Australia, P.O. Box 20, North Beach, Western Australia 6920, Australia;

    Western Australian Fisheries and Marine Research Laboratories, Department of Fisheries, Government of Western Australia, P.O. Box 20, North Beach, Western Australia 6920, Australia;

    Western Australian Fisheries and Marine Research Laboratories, Department of Fisheries, Government of Western Australia, P.O. Box 20, North Beach, Western Australia 6920, Australia;

    Department of Primary Industries, Fisheries Research Branch, P. 0. Box 114, Queenscliff, Victoria 3225, Australia;

    Western Australian Fisheries and Marine Research Laboratories, Department of Fisheries, Government of Western Australia, P.O. Box 20, North Beach, Western Australia 6920, Australia;

    Western Australian Fisheries and Marine Research Laboratories, Department of Fisheries, Government of Western Australia, P.O. Box 20, North Beach, Western Australia 6920, Australia;

    Western Australian Fisheries and Marine Research Laboratories, Department of Fisheries, Government of Western Australia, P.O. Box 20, North Beach, Western Australia 6920, Australia;

    Western Australian Fisheries and Marine Research Laboratories, Department of Fisheries, Government of Western Australia, P.O. Box 20, North Beach, Western Australia 6920, Australia;

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  • 关键词

    connectivity; geochemistry; glaucosoma hebraicum; pagrus auratus; stable isotope; trace element;

    机译：连接性;地球化学大脑青光眼g草稳定同位素微量元素;

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