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Length‐weight relationships of mesopelagic fishes from the equatorial and tropical Atlantic waters: influence of environment and body shape
Journal of Fish Biology ( IF 1.7 ) Pub Date : 2020-03-25 , DOI: 10.1111/jfb.14307
Cristina López-Pérez 1 , M Pilar Olivar 1 , Percy A Hulley 2, 3 , Víctor M Tuset 1
Affiliation  

Length-weight relationships (LWR) were estimated for 36 mesopelagic fish species collected from the equatorial and tropical Atlantic encompassing several oceanographic regions: oligotrophic, equatorial, Cape Blanc, Cape Verde and the Canary Islands. The sample was composed of myctophids (25 specimens), gonostomatids (5), sternoptychids (3), stomiids (2) and phosichthyids (1). The species were clustered according to body shape: 'short and deep' (sternoptychids), 'elongate' (gonostomids, stomiids and some phosichthyids) and 'fusiform' (myctophids and some phosichthyids). Three types of weight and LWRs were considered: wet weight (WW), eviscerated wet weight (eWW) and eviscerated dry weight (eDW). The study demonstrated that most species present a positive allometric growth, independent of the weigh used. However, the allometric value varied in 40-50% of species depending on the type of weight considered. Significant variations linked to fish morphology were found in the relationship between the slope and intercept of the LWR equation. Significant differences were also noted in the water content linked to fish body shape. Based on the distributions of several species we compare their fitness between oceanographic regions using the relative condition factor (Krel ). Except for Diaphus brachycephalus (oligotrophic vs equatorial waters) and Lampanyctus alatus (equatorial, Cape Blanc, Cape Verde and the Canary Islands), no regional significant differences were observed in the species analysed. This article is protected by copyright. All rights reserved.

中文翻译:

赤道和热带大西洋水域中远洋鱼类的体长-体重关系:环境和体型的影响

估计了从赤道和热带大西洋收集的 36 种中层鱼类的长度-重量关系 (LWR),包括几个海洋区域:贫营养区、赤道区、布兰克角、佛得角和加那利群岛。样本由霉菌科 (25 个标本)、淋病纲 (5)、胸鳍科 (3)、口科 (2) 和磷鱼科 (1) 组成。该物种根据体型分组:“短而深”(胸鳍鱼)、“细长”(生殖器、口鱼和一些磷鱼)和“梭形”(丝鱼和一些磷鱼)。考虑了三种类型的重量和 LWR:湿重 (WW)、内脏湿重 (eWW) 和内脏干重 (eDW)。该研究表明,大多数物种呈现出正异速生长,与使用的重量无关。然而,根据所考虑的重量类型,40-50% 的物种的异速生长值不同。在 LWR 方程的斜率和截距之间的关系中发现了与鱼类形态相关的显着变化。与鱼体形状相关的含水量也存在显着差异。基于几个物种的分布,我们使用相对条件因子 (Krel) 比较了它们在海洋学区域之间的适应性。除了 Diaphus brachycephalus(贫养与赤道水域)和 Lampanyctus alatus(赤道、布兰克角、佛得角和加那利群岛)外,在所分析的物种中没有观察到区域显着差异。本文受版权保护。版权所有。在 LWR 方程的斜率和截距之间的关系中发现了与鱼类形态相关的显着变化。与鱼体形状相关的含水量也存在显着差异。基于几个物种的分布,我们使用相对条件因子 (Krel) 比较了它们在海洋学区域之间的适应性。除了 Diaphus brachycephalus(贫养与赤道水域)和 Lampanyctus alatus(赤道、布兰克角、佛得角和加那利群岛)外,在所分析的物种中没有观察到区域显着差异。本文受版权保护。版权所有。在 LWR 方程的斜率和截距之间的关系中发现了与鱼类形态相关的显着变化。与鱼体形状相关的含水量也存在显着差异。基于几个物种的分布,我们使用相对条件因子 (Krel) 比较了它们在海洋学区域之间的适应性。除了 Diaphus brachycephalus(贫营养与赤道水域)和 Lampanyctus alatus(赤道、布兰克角、佛得角和加那利群岛)外,在所分析的物种中没有观察到区域显着差异。本文受版权保护。版权所有。基于几个物种的分布,我们使用相对条件因子 (Krel) 比较了它们在海洋学区域之间的适应性。除了 Diaphus brachycephalus(贫养与赤道水域)和 Lampanyctus alatus(赤道、布兰克角、佛得角和加那利群岛)外,在所分析的物种中没有观察到区域显着差异。本文受版权保护。版权所有。基于几个物种的分布,我们使用相对条件因子 (Krel) 比较了它们在海洋学区域之间的适应性。除了 Diaphus brachycephalus(贫营养与赤道水域)和 Lampanyctus alatus(赤道、布兰克角、佛得角和加那利群岛)外,在所分析的物种中没有观察到区域显着差异。本文受版权保护。版权所有。
更新日期:2020-03-25
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