{"title":"Relationship between body density and feeding habit among flatfishes","authors":"Sango Nishio, Kazuki Ito, Orio Yamamura","doi":"10.1111/jfb.70036","DOIUrl":null,"url":null,"abstract":"<p>The body density of 16 species of flatfish was measured. Their density varied, ranging from 1.011 to 1.074 g cm<sup>−3</sup>, with benthic feeders tending to have the highest values, followed by mixed feeders and then pelagic feeders. Greenland halibut, <i>Reinhardtius hippoglossoides</i>, had the lowest value (1.022 ± 0.0052 g cm<sup>−3</sup>), below the density of seawater (1.026 g cm<sup>−3</sup>), indicating that this species can swim away from the sea floor with low-energy costs. In this manner, low body density may contribute to pelagic feeding. Further study of lipid content and other body characteristics of each flatfish is expected to elucidate their evolutionary traits more clearly.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":"107 2","pages":"647-651"},"PeriodicalIF":1.9000,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of fish biology","FirstCategoryId":"97","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/jfb.70036","RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"FISHERIES","Score":null,"Total":0}
引用次数: 0
Abstract
The body density of 16 species of flatfish was measured. Their density varied, ranging from 1.011 to 1.074 g cm−3, with benthic feeders tending to have the highest values, followed by mixed feeders and then pelagic feeders. Greenland halibut, Reinhardtius hippoglossoides, had the lowest value (1.022 ± 0.0052 g cm−3), below the density of seawater (1.026 g cm−3), indicating that this species can swim away from the sea floor with low-energy costs. In this manner, low body density may contribute to pelagic feeding. Further study of lipid content and other body characteristics of each flatfish is expected to elucidate their evolutionary traits more clearly.
测定了16种比目鱼的体密度。它们的密度变化范围为1.011 ~ 1.074 g cm-3，其中底栖动物的密度最高，混合型次之，远洋型次之。格陵兰大比目鱼（Reinhardtius hippoglossoides）的能量最低（1.022±0.0052 g cm-3），低于海水密度（1.026 g cm-3），表明该物种能够以较低的能量消耗离开海底。以这种方式，低体密度可能有助于远洋捕食。进一步研究每种比目鱼的脂质含量和其他身体特征，有望更清楚地阐明它们的进化特征。
期刊介绍：
The Journal of Fish Biology is a leading international journal for scientists engaged in all aspects of fishes and fisheries research, both fresh water and marine. The journal publishes high-quality papers relevant to the central theme of fish biology and aims to bring together under one cover an overall picture of the research in progress and to provide international communication among researchers in many disciplines with a common interest in the biology of fish.
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