• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polar biology >Sexual dimorphism and mental barbel structure in the South Georgia plunderfish Artedidraco mirus (Perciformes: Notothenioidei: Artedidraconidae)
【24h】

Sexual dimorphism and mental barbel structure in the South Georgia plunderfish Artedidraco mirus (Perciformes: Notothenioidei: Artedidraconidae)

机译：南乔治亚掠夺鱼Artedidraco mirus的性二态性和心理性杠铃结构（Performformes：Notothenioidei：Artedidraconidae）

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

A recent sample (28 specimens from South Georgia and 1 from Shag Rocks) of the plunderfish Artedidraco mirus collected in June 2004 during the ICEFISH Cruise yielded sufficient data to refute two long-held assumptions about this species: (1) it is endemic to South Georgia; (2) its mental barbel is sexually dimorphic (tapered in females and club-shaped with papillae in males). A. mirus exhibits three types of mental barbel: A: tapered without a terminal expansion; B: with a narrow terminal expansion composed of simple papillae; C: with a wide terminal expansion composed of convoluted or elaborately branched papillae. There is no correlation between barbel type and body size or sex. We also found sexual dimorphism in the relative height of the second dorsal fin (30% higher on average in males) and in the colour of the anal fin (black in males over 60 mm SL). The largest males possess a prominent ruffled urogenital papilla, also black in colour. Barbel histology resembles that of other artedidraconids (Dolloidraco longedorsalis, Pogonophryne scotti) studied in containing large nerve trunks and blood vessels lateral to a pseudocartilagi-nous core and dermal papillae with an extensive network of nerves and blood vessels. The high degree of intraspecific variation in artedidraconid barbel structure warrants caution in using this structure as a diagnostic taxonomic character.
机译：2004年6月ICEFISH巡洋舰期间采集的掠食性鱼类Artedidraco mirus的最新样本（来自南乔治亚州的28个标本，来自Shag Rocks的一个标本）提供了足够的数据，驳斥了关于该物种的两个长期存在的假设：（1）它是南特有种佐治亚州（2）其精神上的触角是两性性的（雌性渐细，雄性具棍状，具乳头状）。 A. mirus表现出三种类型的心理触须：A：没有末端扩张的锥形。 B：具有由简单的乳头组成的狭窄的末端扩张； C：末端宽大，由回旋的或精心分支的乳头组成。杠铃类型与身体大小或性别之间没有关联。我们还在第二背鳍的相对高度（雄性平均高出30％）和肛门鳍的颜色（60 mm SL以上的雄性黑色）中发现了性二态性。最大的雄性有显着的皱纹泌尿生殖乳头，也呈黑色。 Barbel的组织学类似于其他青蒿琥酯（Dolloidraco longedorsalis，Pogonophryne scotti）的组织学，研究发现该组织包含大神经干和假to软骨核心和真皮乳头旁的血管，并具有广泛的神经和血管网络。青蒿琥酯杠铃结构的种内变异程度很高，因此在使用该结构作为诊断分类学特征时应谨慎行事。

著录项

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