再引入大鲵微生境选择的种内变异。

IF 1.6 2区 生物学 Q2 ZOOLOGY
Current Zoology Pub Date : 2023-04-01 DOI:10.1093/cz/zoac028
Chunlin Zhao, Jianyi Feng, Zijian Sun, Wei Zhu, Jiang Chang, Wenbo Fan, Jianping Jiang, Bisong Yue, Tian Zhao
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引用次数: 1

摘要

重新引入人工饲养的大鲵是恢复野生种群的主要方法。尽管已有研究调查了重新引入的大鲵的栖息地偏好,但其栖息地选择的种内变化却被忽视了。本研究利用无线电遥测技术,将30只人工繁殖的中华大鲵分成3个类群(雄性10只、雌性10只、幼体10只)放生到一条山地溪流中,探讨了该物种在栖息地选择方面是否发生了种内变化。结果表明,雄性的线性活动范围和日常活动量显著高于雌性和幼鱼。雄鼠久坐时间明显低于雌鼠和幼鼠。在这些测量中,雌性和青少年之间没有发现显着差异。重要的是,我们发现雄性更喜欢低水导电性和深水的微生境。雌鱼偏好水电导率高、溶解氧和氨氮含量低、流速慢的微生境,幼鱼则偏好低氨氮含量的微生境。此外,雄鱼和幼鱼的生态位宽度均高于雌鱼。成鱼和幼鱼的生态位重叠度高,雄鱼和雌鱼的生态位重叠度低。我们的研究揭示了重新引入的中国大鲵存在空间隔离。雄性、雌性和幼鱼在微生境选择上表现出差异。这些结果为制定中国大鲵的保护策略提供了重要信息。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Intraspecific variation in microhabitat selection in reintroduced Chinese giant salamanders.

Intraspecific variation in microhabitat selection in reintroduced Chinese giant salamanders.

Intraspecific variation in microhabitat selection in reintroduced Chinese giant salamanders.

Intraspecific variation in microhabitat selection in reintroduced Chinese giant salamanders.

Reintroduction of captive-bred Chinese giant salamanders is a primary approach for restoring wild populations. Despite previous studies have investigated the habitat preferences of reintroduced Chinese giant salamanders, the intraspecific variation in their habitat selection has been neglected. In the present study, 30 captive-bred Chinese giant salamanders belonging to 3 groups (i.e., 10 males, 10 females, and 10 juveniles) were released into a montane stream to explore whether intraspecific variation in habitat selection occurred in this species using radiotelemetry. Our results indicated that linear home range and daily movement of males were significantly higher than those of females and juveniles. Male sedentariness was significantly lower than that of females and juveniles. No significant differences were detected between females and juveniles in these measures. Importantly, we found that males preferred microhabitats with low water conductivity and deep water depth. Females preferred microhabitats with high water conductivity, low dissolved oxygen and ammonium-nitrogen, and slow current velocity, while juveniles occupied microhabitats with low ammonium-nitrogen. In addition, males and juveniles exhibited higher niche breadth than females. Niche overlap was high between adults and juveniles but low between males and females. Our study revealed the presence of spatial segregation in reintroduced Chinese giant salamanders. Males, females, and juveniles exhibited variation in microhabitat selection. These results provide important information for use when planning strategies for conservation of Chinese giant salamanders.

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来源期刊
Current Zoology
Current Zoology Agricultural and Biological Sciences-Animal Science and Zoology
CiteScore
3.20
自引率
9.10%
发文量
111
审稿时长
6 weeks
期刊介绍: About the Journal Current Zoology (formerly Acta Zoologica Sinica, founded in 1935) is an open access, bimonthly, peer-reviewed international journal of zoology. It publishes review articles and research papers in the fields of ecology, evolution and behaviour. Current Zoology is sponsored by Institute of Zoology, Chinese Academy of Sciences, along with the China Zoological Society.
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