Morphometric ratios of six commercially landed species of skate from the Portuguese continental shelf, and their utility for identification

Barbara Serra-Pereira; Ines Farias; Teresa Moura; Leonel Serrano Gordo; Miguel Santos; Ivone Figueiredo

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Morphometric ratios of six commercially landed species of skate from the Portuguese continental shelf, and their utility for identification

机译：葡萄牙大陆架上六种商业登陆的滑冰鞋的形态比及其识别实用性

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European skate landings have traditionally been reported under a generic landing category, because of problems with species identification. To address this data deficiency, the ICES Working Group on Elasmobranch Fishes compiled conversion factors, including the relationships between different body measurements, for the main elasmobranch species. Size conversion factors for six common NE Atlantic skate species, Leucoraja naevus, Raja brachyura, R. clavata, R. miraletus, R. montagui, and R. undulata are compiled, and the capability of morphometric data to assist species discrimination is evaluated, highlighting the case of similar species such as R. brachyura and R. montagui. The estimated size conversion factors displayed some variability between areas and sexes for most species, the allometric relationship between weight and total length did not differ significantly between sexes, and some morphometric ratios proved adequate in discriminating between rajid species (misclassification error 0.12). Leucoraja naevus was fully discriminated from the remaining species. Species with a similar dorsal colour, e.g. R. brachyura and R. montagui, showed good discrimination based on their morphometry, with just 6-11% misclassification between the two.

机译：由于物种识别方面的问题，传统上已报道欧洲滑冰着陆属于一般着陆类别。为了解决此数据不足的问题，ICES浮游鱼类工作组针对主要的浮游鱼类汇编了转换因子，包括不同体形之间的关系。编制了六个常见东北大西洋滑冰物种Leucoraja naevus，Raja brachyura，R。clavata，R。miraletus，R。montagui和R. undulata的尺寸转换因子，并评估了形态计量学数据协助物种识别的能力，强调类似物种的情况，例如R. brachyura和R. montagui。估计的大小转换因子显示出大多数物种在面积和性别之间存在一定的变异性，性别之间的重量和总长度之间的异形关系没有显着差异，并且一些形态学比率已证明足以区分拉吉德物种（误分类误差0.12）。 Leucoraja naevus与其余物种完全区分开。背色相似的物种，例如R. brachyura和R. montagui基于其形态学表现出良好的区分度，两者之间只有6-11％的错误分类。

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来源
《ICES Journal of Marine Science》 |2010年第8期|p.1596-1603|共8页
作者
Barbara Serra-Pereira; Ines Farias; Teresa Moura; Leonel Serrano Gordo; Miguel Santos; Ivone Figueiredo;
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作者单位

Institute Nacional de Recursos Biologicos IP/IPIMAR, Unidade de Recursos Marinhos e Sustentabilidade, Avenida Brasilia, 1449-006 Lisboa, Portugal;

rnInstitute Nacional de Recursos Biologicos IP/IPIMAR, Unidade de Recursos Marinhos e Sustentabilidade, Avenida Brasilia, 1449-006 Lisboa, Portugal;

rnInstitute Nacional de Recursos Biologicos IP/IPIMAR, Unidade de Recursos Marinhos e Sustentabilidade, Avenida Brasilia, 1449-006 Lisboa, Portugal;

rnFaculdade de Ciencias de Lisboa, Centro de Oceanografia and Departamento de Biologia Animal, Bloco C2, Campo Grande, 1749-076 Lisboa, Portugal;

rnInstitute Nacional de Recursos Biologicos I.P./IPIMAR, Unidade de Recursos Marinhos e Sustentabilidade, Avenida 5 de Outubro s, 8700-305 Olhao, Portugal;

rnInstitute Nacional de Recursos Biologicos IP/IPIMAR, Unidade de Recursos Marinhos e Sustentabilidade, Avenida Brasilia, 1449-006 Lisboa, Portugal;

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正文语种 eng
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关键词
biometry; fisheries; portugal; rajidae; size conversion factors; skates;

机译：生物特征渔业;葡萄牙;j科尺寸换算系数;冰鞋;

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Morphometric ratios of six commercially landed species of skate from the Portuguese continental shelf, and their utility for identification

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