阿根廷 Cangrejales 海滩 Cyrtograpsus 种类的大小分布和阶段比例

IF 1.6 4区 环境科学与生态学 Q3 ECOLOGY
Austral Ecology Pub Date : 2024-08-21 DOI:10.1111/aec.13579
M. Andrea Onorato, Pablo D. Cochia, J. G. Loreley Oviedo
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引用次数: 0

摘要

螃蟹在营养物质循环、栖息地结构、种群控制和环境健康指标等方面发挥着重要作用,是沿海生态系统的基础。调查这些物种的大小分布和生命阶段对于了解它们的生态学和设计有效的保护策略至关重要。本研究提供了坎格雷哈雷斯海滩潮间带两个当地物种鲤形目(十足目:腕足动物:Varunidae)种群的分布和阶段比例数据。这些地方性物种以前在研究地区未被描述过,这突出表明了未来进一步研究的必要性。在 2019 年 12 月至 2020 年 2 月期间进行了三次调查,沿垂直于海岸的横断面进行,获得了两个系列的数据(C-I 和 C-II)。对标本进行了识别、性别鉴定和原地测量,以便随后放流。共对 1099 个个体进行了计数,确定了 Cyrtograpsus affinis(C-I = 278;C-II = 332)和 Cyrtograpsus angulatus(C-I = 215;C-II = 277),其中 C. affinis 的比例较高。这些物种在坎格雷哈雷斯海滩的出现与文献报道的地理分布相吻合,但比例与阿根廷其他海滩的报道有所不同。最常见的长度等于或小于 10 毫米的头胸甲长度(±1 毫米)。没有记录文献中报道的每个物种的最大长度。对于 C. angulatus 而言,幼体总是多于成体和幼体。C. affinis 的成体和幼体比例在上区和中区有所波动,12 月和 2 月期间成体在下区占优势。幼鱼占据了所有中沿岸层,而成鱼则更多地出现在中层和底层。这些信息对于开发保护这些物种及其环境的管理工具至关重要。各阶段的划分是根据文献中的标准进行的。使用数据分布和频率图进行分析和解释。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Size distribution and proportion of stages of Cyrtograpsus species in Playa Cangrejales, Argentina

Crabs are fundamental in coastal ecosystems due to their role in nutrient cycling, habitat structuring, population control and as indicators of environmental health. Investigating the size distribution and life stages of these species is crucial for understanding their ecology and designing effective conservation strategies. This study provides data on the distribution and stage ratios of two populations of local species of the genus Cyrtograpsus (Decapoda: Brachyura: Varunidae) in the Playa Cangrejales intertidal. These endemic species had not been previously described in the study area, highlighting the need for further research in the future. Three surveys were conducted from December 2019 to February 2020, following a transect perpendicular to the coast, obtaining two series of data (C-I and C-II). Specimens were identified, sexed and measured in situ for subsequent release. A total of 1099 individuals were counted, identifying Cyrtograpsus affinis (C-I = 278; C-II = 332) and Cyrtograpsus angulatus (C-I = 215; C-II = 277), with a higher proportion of C. affinis. The presence of these species at Playa Cangrejales coincides with the geographical distribution reported in the literature, although the proportions differ from those reported for other Argentinean beaches. The most frequent lengths were equal to or less than 10 mm cephalothorax length (±1 mm). The maximum lengths reported in the literature for each species were not recorded. For C. angulatus, juveniles always predominated over adults and recruits. C. affinis showed fluctuations between adult and juvenile proportions in the upper and middle zones, with adults predominating in the lower zone during December and February. Juveniles occupied all mesolittoral floors, whereas adults were more frequent in the middle and lower floors. This information is essential to develop management tools to protect these species and their environment. The division between stages was realized following criteria from the literature. Analyses and interpretations were made using data distribution and frequency graphs.

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来源期刊
Austral Ecology
Austral Ecology 环境科学-生态学
CiteScore
2.90
自引率
6.70%
发文量
117
审稿时长
12-24 weeks
期刊介绍: Austral Ecology is the premier journal for basic and applied ecology in the Southern Hemisphere. As the official Journal of The Ecological Society of Australia (ESA), Austral Ecology addresses the commonality between ecosystems in Australia and many parts of southern Africa, South America, New Zealand and Oceania. For example many species in the unique biotas of these regions share common Gondwana ancestors. ESA''s aim is to publish innovative research to encourage the sharing of information and experiences that enrich the understanding of the ecology of the Southern Hemisphere. Austral Ecology involves an editorial board with representatives from Australia, South Africa, New Zealand, Brazil and Argentina. These representatives provide expert opinions, access to qualified reviewers and act as a focus for attracting a wide range of contributions from countries across the region. Austral Ecology publishes original papers describing experimental, observational or theoretical studies on terrestrial, marine or freshwater systems, which are considered without taxonomic bias. Special thematic issues are published regularly, including symposia on the ecology of estuaries and soft sediment habitats, freshwater systems and coral reef fish.
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