Uncoupling of otolith and somatic growth in Pagrus auratus ISparidaeJ
Uncoupling of otolith and somatic growth in Pagrus auratus ISparidaeJ
复制标题
真鲷耳石与体细胞生长的解偶联
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
S. G. Scott
中科院分区：
文献类型：
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作者：
Malcolm;Francis;Maryann;Williams;Andréa;Pryce;S. Pollard;S. G. Scott
生长缓慢的鱼往往比相同长度的快速生长的鱼具有更重，更大的耳石，因为耳石即使在体细胞生长减缓或停止时也会继续生长（例如，Templeman & Squires 1956，Mosegaard et a1. 1988，Reznick et al. 1989，Secor & Dean 1989，Secor et a1. 1989，Campana 1990，Pawson 1990）。这种解偶对于从耳石中的检查标记反算鱼长具有重要意义。如果耳石尺寸和鱼长之间的关系随生长率而变化，则反算长度可能有偏差（Campana 1990）。通过指定“生物截距”（如孵化时的耳石和体细胞大小）并将随时间变化的生长（通过每日增量宽度测量）纳入反算方程，可以在很大程度上克服这种偏差（Campana 1990）。Pagrus auratus（Bloch & Schneider 1801）是一种具有重要商业价值的鲷科鱼类，分布于西太平洋的温带至亚热带海域。它以前曾被报道过许多同义词，特别是P. major（日本），A.auratus（澳大利亚和新西兰）和C.单色（澳大利亚）（Paulin 1990）。在新西兰和澳大利亚，金笛鲷的俗称是“笛鲷”，但它不是真正的笛鲷（笛鲷科）。在日本饲养的幼鱼和定居前的幼鱼中已经证实了耳石和身体生长的解偶联（Secor et a1. 1989年）。在这项研究中，我们报告解偶联的耳石和体细胞生长在野生，定居后，少年新西兰笛鲷。我们还讨论了这对回计算少年笛鲷长度耳石每日增量的影响。
Slow-growing fish tend to have heavier, larger otoliths than fastgrowing fish of the same length, because otoliths continue to grow even when somatic growth has slowed or stopped (e.g., Templeman & Squires 1956, Mosegaard et a1. 1988, Reznick et a1. 1989, Secor & Dean 1989, Secor et a1. 1989, Campana 1990, Pawson 1990). This uncoupling has important implications for the back-calculation of fish lengths from check marks in the otoliths. If the relationship between an otolith dimension and fish length varies with growth rate, the backcalculated lengths may be biased (Campana 1990). This bias may be largely overcome by specifying a "biological intercept" (such as otolith and somatic size-at-hatching) and incorporating time-varying growth (as measured by daily increment widths) into the backcalculation equation (Campana 1990). Pagrus auratus (Bloch & Schneider 1801) is a commerciallyimportant sparid fish that ranges through most of the temperate to subtropical Western Pacific Ocean (Paulin 1990). It has been reported previously under a variety of synonyms, especially P. major (Japan), Chrysophrys auratus (Australia and New Zealand), and C. unicolor (Australia) (Paulin 1990). The common name for P. auratus in New Zealand and Australia is "snapper," though it is not a true snapper (Lutjanidae). Uncoupling of otolith and somatic growth has been demonstrated in reared larval and presettlement juvenile P. auratus from Japan (Secor et a1. 1989). In this study, we report uncoupling of otolith and somatic growth in wild, postsettlement, juvenile New Zealand snapper. We also discuss the implications this has for back-calculation of juvenile snapper lengths using otolith daily increments.