耳石形状可用作推断西南大西洋鲂(Larimus breviceps)个体之间种群连通性的工具

IF 1.1 4区 生物学 Q3 MARINE & FRESHWATER BIOLOGY Journal of the Marine Biological Association of the United Kingdom Pub Date : 2024-05-13 DOI:10.1017/s0025315424000444
Barbara Maichak de Carvalho, Yasmin Barbieri, Beatriz Andrade Syrio, Kátia Meirelles Felizola Freire, Acácio Ribeiro Gomes Tomás
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引用次数: 0

摘要

耳石是分析成鱼和幼鱼之间栖息地使用模式以及鱼类种群之间联系的极佳工具。鲂鱼(Larimus breviceps)属于鲷科(Sciaenidae),在海洋食物链中扮演着重要角色,是巴西沿海对虾渔业中最丰富和最常见的副渔获物物种之一。本研究旨在比较在巴西三个不同沿海地区采集的标本的耳石形状:塞尔希培(SE),东北部地区;圣保罗(SP),东南部地区;巴拉那(PR),南部地区。在实验室中,对 88 块耳石进行了提取和拍照,并采用小波法对其轮廓进行了分析(其中 32 块来自东南部地区,28 块来自圣保罗州,28 块来自巴拉那州)。不同采样点的耳石轮廓各不相同。通过线性判别分析,60.23%的耳石被采样点正确重新分类,其中东南部(62.5%)的重新分类效果最好,其次是南太平洋(60.71%)和南太平洋(57.14%)。多变量方差分析也表明,各采样点的轮廓存在显著差异(F = 2.3; P < 0.005)。因此,L. breviceps 的耳石有两种形态:一种来自塞尔希培(巴西东北部),另一种来自巴西东南部-南部,这表明圣保罗和巴拉那近海种群之间存在联系,有待今后的遗传研究加以证实。
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Otolith shape can be used as a tool to infer population connectivity among individuals of Larimus breviceps at Southwestern Atlantic
Otoliths are an excellent tool for analysing the pattern of habitat use between adults and juveniles and connectivity between fish populations. Larimus breviceps is a species belonging to the family Sciaenidae, which has an important role in the marine food chain, as it is one of the most abundant and frequent species in the bycatch of coastal shrimp fisheries in Brazil. The present study aimed at comparing the otolith shape of specimens collected in three different Brazilian coastal areas: Sergipe (SE), northeastern region; São Paulo (SP), southeastern region; and Paraná (PR), southern region. In a laboratory, 88 otoliths were extracted, photographed, and the contour was analysed by the wavelet method (32 from SE, 28 from SP, and 28 from PR). The otolith contours varied between sampling sites. Linear discriminant analysis correctly reclassified 60.23% otoliths by the sampled sites, with the best reclassifications occurring in SE (62.5%), followed by PR (60.71%) and SP (57.14%). Multivariate analysis of variance also evidenced significant differences in contours among the sampling sites (F = 2.3; P < 0.005). Thus, two morphotypes of otoliths were found for L. breviceps: one from Sergipe (northeastern Brazil) and the second one from southeastern–southern Brazil, indicating connectivity between the populations off São Paulo and Paraná, to be confirmed by future genetic studies.
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来源期刊
CiteScore
2.30
自引率
8.30%
发文量
68
审稿时长
3-8 weeks
期刊介绍: JMBA is an international journal, publishing original research on all aspects of marine biology. It includes pioneering work taking place today on major issues concerning marine organisms and their environment. Subjects covered include: ecological surveys and population studies of marine communities; physiology and experimental biology; taxonomy, morphology and life history of marine animals and plants; and chemical and physical oceanographic work. Included with 2010 online subscriptions: Marine Biodiversity Records.
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