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Conservation of the endangered blue land crab Cardisoma guanhumi Latreille in Latreille, Le Peletier, Serville & Guérin, 1828 (Decapoda: Brachyura: Gecarcinidae) in Brazil: optimal habitats and environmental factors
Journal of Crustacean Biology ( IF 1.1 ) Pub Date : 2021-04-02 , DOI: 10.1093/jcbiol/ruab011
Wendel R R Novais 1, 2 , Fabrício L Carvalho 2, 3 , Erminda C G Couto 1, 2
Affiliation  

Cardisoma guanhumi Latreille in Latreille, Le Peletier, Serville & Guérin, 1828, the blue land crab, is a marine semi-terrestrial crab that builds burrows in different habitats along estuaries, an ecosystem severely modified and fundamental to this endangered species in Brazil. The presence of adequate habitats and physical, chemical, and biological conditions often determine the spatial distribution of populations. We aimed to characterize the most relevant environmental conditions among the main environments present in southern Bahia state, Brazil, and evaluate their influence on the spatial distributions of C. guanhumi to define which habitats are most critical for the conservation of the species. Our results showed that there is no relationship between spatial distributions and any particular habitat, but instead to the physical and other environmental parameters studied. Low-elevation areas along the river shore, shading, a supply of leaf litter, and bare sandy substrate are highlighted as priority for the conservation of C. guanhumi. These physical factors limit the distribution of juveniles, which form dense groups on river shores without significant differences between habitats. The preservation of the native forest and restinga shrubs that border rivers appear as fundamental for the conservation of the species.

中文翻译:

巴西 Latreille, Le Peletier, Serville & Guérin, 1828 (十足目: Brachyura: Gecarcinidae) 濒临灭绝的蓝地蟹 Cardisoma guanhumi Latreille 的保护:最佳栖息地和环境因素

Cardisoma guanhumi Latreille in Latreille, Le Peletier, Serville & Guérin, 1828,蓝色陆地蟹,是一种海洋半陆生蟹,在河口沿岸的不同栖息地筑巢,这是一个严重改变的生态系统,是巴西这种濒临灭绝物种的基础。充足的栖息地以及物理、化学和生物条件的存在通常决定了种群的空间分布。我们旨在描述巴西巴伊亚州南部主要环境中最相关的环境条件,并评估它们对 C. guanhumi 空间分布的影响,以确定哪些栖息地对该物种的保护最为关键。我们的研究结果表明,空间分布与任何特定栖息地之间没有关系,而是研究物理和其他环境参数。沿河岸的低海拔地区、遮荫、落叶供应和裸露的沙质基质被列为关胡米保护的重点。这些物理因素限制了幼鱼的分布,它们在河岸上形成密集的群体,栖息地之间没有显着差异。保护与河流接壤的原生森林和restinga灌木似乎是保护该物种的基础。它们在河岸上形成密集的群体,栖息地之间没有显着差异。保护与河流接壤的原生森林和restinga灌木似乎是保护该物种的基础。它们在河岸上形成密集的群体,栖息地之间没有显着差异。保护与河流接壤的原生森林和restinga灌木似乎是保护该物种的基础。
更新日期:2021-04-02
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