...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polar biology >Biological aspects of a rare nototheniid fish, Trematomus tokarevi,from the Weddell Sea (Antarctica)
【24h】

Biological aspects of a rare nototheniid fish, Trematomus tokarevi,from the Weddell Sea (Antarctica)

机译：来自韦德尔海（南极洲）的罕见而不是罕见的鱼类，Trematomus tokarevi的生物方面

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The bigeye notothen, Trematomus tokarevi, is a rare nototheniid fish with a putative circum-Antarctic distribution. Due to its prevalent deep water occurrence, this species is rarely caught and its biology poorly known. In addition, this species has been often misidentified with Trematomus nicolai, a morphologically similar species with a partially overlapping distribution. The odd catch of a few specimens of T. tokarevi in the southern Weddell Sea enabled us to provide for the first time preliminary data on reproductive traits and individual age of this species. Fish sample consisted of five females, collected in the austral summer north east of the Filchner Trough at about 750 m depth. Based on histological analyses of gonads, smaller females were in early developing phase, whilst larger ones were regressing, suggesting a summer spawning season, as reported elsewhere. The analysis of growth rings pattern of sagittal otoliths allowed to estimate the individual age, which ranged between 4 and 10 years. In conclusion, this species exhibits most of the common biological traits described in other trematomids, although with some peculiarities, showing at the same time low fecundity and small egg size at spawning.
机译：Bigeye Notohoth，Trematomus Tokarevi是一种罕见的路易生鱼，具有推定的致命南极分布。由于其普遍的深水发生，这种物种很少被捕获，并众所周知。此外，该物种经常与Trematomus Nicolai误诊，其形态学类似的类似物种，具有部分重叠的分布。南德尔大海南部托克雷维的奇怪捕获的T. Tokarevi标本使我们能够提供关于该物种的生殖性状和个体年龄的第一次初步数据。鱼类样本由五个女性组成，在南部的菲克纳山谷东部收集在大约750米深度。基于Gonads的组织学分析，较小的女性在早期开发阶段，较大的较大者正在回归，旨在夏天产卵季节，如其他地方。分析矢状散岩的生长环模式允许估计各个年龄，在4至10年之间。总之，该物种表现出在其他雷肽中描述的大部分常见的生物学性状，尽管有一些特殊性，但在产卵时同时显示出低繁殖力和小蛋尺寸。

著录项

  • 来源
    《Polar biology》 |2021年第10期|2049-2053|共5页
  • 作者

    La Mesa Mario; Donato Fortunata; Riginella Emilio;

  • 作者单位

    CNR Ist Sci Polari ISP Area Ric Bologna Via P Gobetti 101 I-40129 Bologna Italy;

    CNR Ist Risorse Biol & Biotecnol Marine IRBIM Sede Ancona Largo Fiera Pesca I-60125 Ancona Italy;

    Stn Zool Anton Dohrn Dipartimento Ecol Marina Integrata Villa Comunale I-80121 Naples Italy;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Antarctic fish; Bigeye notothen; Biology; Reproduction; Age;

    机译：南极鱼;Bigeye nothothen;生物学;繁殖;年龄;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号