• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ichthyological Exploration of Freshwaters >Reproductive biology of the neotropical superfetaceousPamphorichthys hollandi (Cyprinodontiformes: Poeciliidae)
【24h】

Reproductive biology of the neotropical superfetaceousPamphorichthys hollandi (Cyprinodontiformes: Poeciliidae)

机译：新热带超岩藻的繁殖生物学（Pamphorichthys hollandi）（Cyprinodontiformes：Poeciliidae）

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

We investigated sex ratio, reproductive period, fecundity, and sexual dimorphism of Pamphorichthys hollandi in southeastern Brazil. Reproductive status was identified according to a female's gonads/embryos development scale. Of the 613 collected specimens, 373 60 % were females and 240 40 % males giving a sex ratio of 1 male : 1.6 female. Sexual dimorphism was evident in respect to body size, body coloration, and anal and pelvic-fin morphologies. The highest proportion of reproductive females wasregistered in January and February, which represent wet and hot periods. The simultaneous presence of more than one litter at different stages of development within a single female characterized this species as superfetaceous.No presente estudo investigamos a razao sexual, periodo reprodutivo, fecundidade e dimorfismo sexual de Pamphorichthys hollandi no sudeste do Brasil. Os estagios reprodutivos foram identificados com base em uma escala de desenvolvimento das gonadas/embrioes. Dos 613 individuos coletados, 373 60 % eram femeas e 240 40 % machos, dando uma razao sexual de 1 macho : 1,6 femea. O dimorfismo sexual foi evidente em relac,ao ao tamanho corporal, coloragao do corpo e morfologia das nadadeiras pelvica e anal. A maior incidencia de femeas reprodutivas ocorreu em Janeiro e fevereiro, que correspondem a periodos umidos e quentes. A presenga simul-tanea de embrioes em diferentes estagios de desenvolvimento na mesma femea caracteriza essa especie como superfetadora.
机译：我们调查了巴西东南部斑节虾（Pamphorichthys hollandi）的性别比，生殖期，繁殖力和性二态性。根据女性的性腺/胚胎发育规模确定生殖状态。在收集的613个标本中，有373 60％是女性，而240 40％是男性，性别比为1：1.6。在体型，体色以及肛门和骨盆鳍形态方面，性二态性很明显。一月和二月登记的生殖女性比例最高，分别代表湿热时期。同一雌性在同一发育阶段同时存在一个以上的凋落物，因此该物种具有超足动物特征。没有巴西人对这种性生活进行深入研究，没有发现巴西的性生活，生殖器繁殖行为，雌性生活习性。生殖器官论坛的身份证明书，包括胚胎干/胚胎。 Dos 613个人coletados，373 60％普通女性，240 40％男子气的男人，dando uma razao sex de 1男子气概：1,6女性。男性或女性的性行为可以被证明为肛门，肛门或肛门的形态。一个珍贵的女性偶发事件普通法和普通资格证书同时存在。

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