Life history and population dynamics of the enigmatic tanaid Chondrochelia dubia (Tanaidacea: Leptocheliidae) in a tropical seaweed bed

IF 0.8 4区生物学 Q4 MARINE & FRESHWATER BIOLOGY

Scientia Marina Pub Date : 2023-03-30 DOI:10.3989/scimar.05322.059

Rodrigo V. A. Alves, F. Lucena Frédou, Nykon Craveiro, Leandro Nolé Eduardo, J. S. Rosa Filho

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引用次数: 0

Abstract

The present study describes the population dynamics and life history parameters of the enigmatic tanaid Chondrochelia dubia collected in Paiva Beach, tropical coast of Brazil. The region was impacted by a large, unexpected oil spill from August to October 2019. Samples were taken monthly between July 2019 and July 2020 in beds of the red seaweed Jania capillacea. The abundance of individuals was negatively correlated with monthly rainfall, with higher abundances in drier months. There was an unexpected significant drop in abundance in September, possibly caused by contact with the crude oil, but the population recovered fully within two months. The parameters of the von Bertallanfy growth equation, calculated for the first time for the species, were Linf=5.26 mm; k=3.36 year–1; t0=0.0. Compared with other studies, the specimens are very small (2.04 ± 0.95 mm in length), females reach sexual maturity very early (L50=2.3 mm), and natural mortality is high (Z=M=5.77 year–1), indicating an opportunistic life strategy. This study reinforces the bioindication potential of C. dubia and the use of bootstrapped length-based methods to estimate key population parameters in small marine invertebrates.

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热带海藻床中神秘的褐藻软骨菌的生活史和种群动态

本研究描述了在巴西热带海岸派瓦海滩采集的神秘的tanaid Chondrochelia dubia的种群动态和生活史参数。2019年8月至10月，该地区受到了一场大规模的意外石油泄漏的影响。在2019年7月至2020年7月期间，每月在红海藻Jania capillacea的海床上采集样本。个体的丰度与月降雨量呈负相关，干旱月份的个体丰度更高。9月份的丰度出现了意外的大幅下降，可能是由于与原油的接触，但种群在两个月内完全恢复。首次为该物种计算的von-Bertallanfy生长方程的参数为Linf=5.26mm；k=3.36年-1；t0=0.0。与其他研究相比，标本非常小（长度为2.04±0.95 mm），雌性很早就达到性成熟（L50=2.3 mm），自然死亡率很高（Z=M=5.77年-1），表明存在机会主义生活策略。这项研究加强了杜比亚C.dubia的生物指示潜力，并使用基于自举长度的方法来估计小型海洋无脊椎动物的关键种群参数。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Scientia Marina 生物-海洋与淡水生物学

CiteScore

2.10

自引率

0.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Scientia Marina is the successor to Investigación Pesquera, a journal of marine sciences published since 1955 by the Institut de Ciències del Mar de Barcelona (CSIC). Scientia Marina is included in the Science Citation Index since 1998 and publishes original papers, reviews and comments concerning research in the following fields: Marine Biology and Ecology, Fisheries and Fisheries Ecology, Systematics, Faunistics and Marine Biogeography, Physical Oceanography, Chemical Oceanography, and Marine Geology. Emphasis is placed on articles of an interdisciplinary nature and of general interest.