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Length–weight relationships for five species of Chimaerids and two species of Rhinochimaerids to the west of Ireland
Journal of Applied Ichthyology ( IF 0.7 ) Pub Date : 2021-02-01 , DOI: 10.1111/jai.14178
Brendan O'Hea 1 , Graham Johnston 1
Affiliation  

Length–weight regressions for five chimaerid species, Chimaera monstrosa Linnaeus, 1758, Chimaera opalescens Luchetti, Iglesias & Sellos, 2011, Hydrolagus affinis de Brito Capello, 1868, Hydrolagus pallidus Hardy & Stehmann, 1990 and Hydrolagus mirabilis Collett, 1904, and two Rhinochimaerid species, Rhinochimaera atlantica Holt & Byrne, 1909 and Harriotta raleighana Goode & Beane, 1895, are calculated from data collected during a series of deepwater surveys conducted by the Irish Marine Institute from 2006 to 2009. This work was carried out on the continental slope to the west and northwest of Ireland and the northern slope of the Porcupine bank. Samples were measured fresh at the end of each haul. Due to the fragility of the tails of many of these species, length measurements for Chimaerids were made to the pre supra caudal fin, while for Rhinochimaerids they were made to the second dorsal fin. Lengths were measured to the nearest centimetre below and weights were recorded to the nearest gram. Outliers were removed from the dataset according to difference in fits (DFFITS) (Belsley et al., Regression diagnostics: Identifying influential data and sources of collinearity, John Wiley & Sons; 1980). b values for the Chimaeridae ranged from 2.915 to 3.075, while r2 values ranged from .981 to .995. b values for H. raleighana and R. atlantica were 2.764 and 3.505 and r2 values were .977 and .976 respectively.

中文翻译:

爱尔兰西部五种奇异鸟和两种犀属的长度-重量关系

五个Chimaerid物种的长度-重量回归,Chimaera monstrosa Linnaeus,1758,Chimaera opalescens Luchetti,Iglesias&Sellos,2011,Hydralagus affinis de Brito Capello,1868,Hydrolagus pallidus Hardy&Stehmann,1990和Rhylagus mirabilis Collett,1904,以及两个种类,Rhinochimaera atlantica Holt&Byrne,1909年和Harriotta raleighanaGoode&Beane,1895年,是根据爱尔兰海事研究所2006年至2009年进行的一系列深水调查收集的数据计算得出的。这项工作是在爱尔兰西部和西北部的大陆坡以及爱尔兰北部的北坡进行的。豪猪银行。在每次拖运结束时都应新鲜测量样品。由于这些物种中许多尾巴的易碎性,因此对Chimaerids的长度测量是在上尾鳍之前进行的,而Rhinochimaerids的测量则是在第二背鳍上进行的。测量长度至最接近的厘米以下,记录重量至最接近的克。根据拟合差异(DFFITS)从数据集中删除离群值(Belsley等人,回归诊断:确定有影响力的数据和共线性的来源,约翰·威利父子(John Wiley&Sons);1980)。Chimaeridae的b值范围为2.915至3.075,而r 2值范围为.981至.995。罗瑞纳氏菌大西洋罗非鱼的b值分别为2.764和3.505,r 2值分别为.977和.976。
更新日期:2021-03-15
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