Growth, mortality, and reproduction of Tagelus plebeius (Bivalvia: Solecurtidae) in Southeast Brazil
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- 作者：Camila Fernanda da Silva ; Guilherme Nascimento Corte…
- 关键词：Population dynamics ; Reproductive analysis ; Stout razor clam ; Subtropical sandy beach
- 刊名：Helgoland Marine Research
- 出版年：2015
- 出版时间：March 2015
- 年：2015
- 卷：69
- 期：1
- 页码：1-12
- 全文大小：1,443 KB
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- 出版者：Springer Berlin Heidelberg
- ISSN：1438-3888
文摘
Tagelus plebeius (Lightfoot, 1786) is a stout razor clam that is economically exploited in several countries, including several local fisheries along the Brazilian coast. Despite its wide distribution and economic importance, there are few studies that have examined the population biology of this species. This study aimed to improve the current knowledge about the biology of T. plebeius by investigating its growth and mortality on a subtropical sandy beach in Southeast Brazil over a 1-year period. In addition, the reproduction of T. plebeius was analyzed through qualitative and quantitative histological analyses during the last 7?months of the study. The parameters of the von Bertalanffy growth function were estimated to be L ?/em> ?=?74.14?mm, K?=?0.52?year?, C?=?0.47, and WP?=?0.94. The instantaneous mortality rate (Z) was 2.16?year?, and the life span was 2.58?years. We confirmed variations (H?=?651.35; P?Z) and low recruitment rates can be interpreted as reflecting that the population of T. plebeius is under a low restoration process and could be an indication that this species has an endangered status in the study area.