澳大利亚季风热带地区神秘淡水小龙虾(Parastacidae)的重新发现、系统学和保护

IF 2.5 3区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
Michael P. Hammer, Nick S. Whiterod, Frédéric Grandjean, Jared J. Tromp, Suzanne K. Horner, Chris M. Austin
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引用次数: 0

摘要

淡水湿地是世界上最宝贵的生态系统之一,支持着多种多样的生物群落和重要的生态服务,然而这些栖息地却遭受了广泛而普遍的人为干扰。澳大利亚北部是一个罕见的相对未经改造的广阔湿地栖息地。对该地区淡水螯虾的记录很少,只有一个神秘物种--胡桃钳鲶Cherax nucifraga,是从捕食性鱼类胃中随机取样的单个个体。在这里,我们报告了在分布相对有限的半永久性沿海淡水湿地中重新发现 C. nucifraga 的情况。实地研究旨在为自然资源管理和保护提供信息。通过对基因组进行脱脂处理以恢复有丝分裂基因组、18S-28S 和组蛋白序列,结果表明该物种与热带地区的两个同系物种是姊妹关系,而且在大陆和梅尔维尔岛之间的 C. nucifraga 中,明显存在中等程度的分子遗传亚结构。Cherax nucifraga 的特征是在爪的外缘有一个草莓色的软斑,成熟的雄性和雌性都有。研究人员将该物种与同域分布的红爪蟾蜍(Cherax quadricarinatus)和异域分布的白爪蟾蜍(Cherax bicarinatus)进行了特征和多变量形态计量学比较,并将诊断特征总结为视觉指南和检索表。面对澳大利亚北部沿海淡水湿地日益增长的发展和环境变化,进一步了解生态学、威胁和传统生态知识的计划将有助于为该物种未来的保护管理提供信息。具体的保护行动包括确定和保护避难栖息地,以及防止其他 Cherax 物种的入侵。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Rediscovery, systematics and conservation of an enigmatic freshwater crayfish (Parastacidae) from the Australian monsoon tropics

Freshwater wetlands are among the world's most valuable ecosystems, supporting diverse biota and critical ecological services, yet these habitats have suffered extensive and pervasive anthropogenic disturbance. Northern Australia represents a rare example of a relatively unmodified, vast wetland habitat. The freshwater crayfishes of the region are poorly documented, with one enigmatic species, the nutcracker yabby Cherax nucifraga, described from a single individual sampled opportunistically from the stomach of a predatory fish. Here we report on the rediscovery of C. nucifraga from a relatively limited distribution in semi-permanent coastal freshwater wetlands. Field studies were conducted to inform natural resource management and conservation. Genome skimming to recover mitogenomes, 18S–28S and histone sequences demonstrated a sister relationship with two congeners from the tropics, and moderate molecular genetic substructure was apparent within C. nucifraga between mainland and Melville Island locations. Cherax nucifraga is characterised by the presence of a strawberry-coloured soft patch on the outer margin of the claw, uniquely present in both mature males and females. Meristic and multivariate morphometric comparisons are made with the co-occurring redclaw Cherax quadricarinatus and the allopatric whiteclaw yabby Cherax bicarinatus, with a summary of diagnostic traits developed into a visual guide and key. Programs to further understand ecology, threats and traditional ecological knowledge will help to inform the future conservation management of the species in the face of increasing development and environmental change to northern Australian coastal freshwater wetlands. Specific conservation actions include identifying and protecting refuge habitats and preventing incursions by other Cherax species.

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来源期刊
Aquatic Conservation-Marine and Freshwater Ecosystems
Aquatic Conservation-Marine and Freshwater Ecosystems 环境科学-海洋与淡水生物学
CiteScore
5.50
自引率
4.20%
发文量
143
审稿时长
18-36 weeks
期刊介绍: Aquatic Conservation: Marine and Freshwater Ecosystems is an international journal dedicated to publishing original papers that relate specifically to freshwater, brackish or marine habitats and encouraging work that spans these ecosystems. This journal provides a forum in which all aspects of the conservation of aquatic biological resources can be presented and discussed, enabling greater cooperation and efficiency in solving problems in aquatic resource conservation.
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