气候变化领域集成服务门户(CCPortal): Biological patterns of reproduction of the Brazilian sardine Sardinella brasiliensis in the purse seine fishery of Southwest Atlantic Ocean: A long-term assessment

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DOI	10.1016/j.marenvres.2024.106457
	Biological patterns of reproduction of the Brazilian sardine Sardinella brasiliensis in the purse seine fishery of Southwest Atlantic Ocean: A long-term assessment
	Schroeder, Rafael; Petermann, Angelica; Schwingel, Paulo R.; Correia, Alberto T.
发表日期	2024
ISSN	0141-1136
EISSN	1879-0291
起始页码	197
卷号	197
英文摘要	Recent estimates of the size at first maturity (L50) of Sardinella brasiliensis showed contradictory results with a decreasing in the fish stock biomass encompassed by increasing values of L50. The methodological approach used hereby allowed to separate sardines classified in the virginal maturity stage from those categorized in the recovery stage, and ready for one next spawning event. This study evaluated the hypothesis of the existence of separated stocks experiencing distinct environmental conditions and fishing pressures which may have altered L50 estimates using a robust dataset based on biological samples collected along the entire species distribution area in the southeast-south Brazilian coast [Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR), Santa Catarina (SC) and Rio Grande do Sul (RS)] between 2000 and 2018. A reclassification of the gonadal maturity stages provided a more realistic estimate of L50. Combining biological, reproductive, fishing data and the mean temperature of the catch (MTC), the leave-one-out classification correctly re-assigned individuals with an overall accuracy of 85% [100% (RJ), 45% (SP), 99% (PR), 99% (SC) and 82% (RS)]. The connectivity between the local populations of S. brasiliensis off RJ (23 degrees S) and the southern populations is limited, contrasting to spatial structured semi-discrete population-units found between SP and RS (24 degrees S-30 degrees S). The northern extreme population-unit (RJ, 22 degrees S-23 degrees S) showed an expressive reduction of L50, and a negative correlation was detected between the increasing MTC values and the abundance of early maturing individuals and recruits of the species. Stock specific L50 estimates seemed to act as indicators of long term environmental fluctuations.
英文关键词	Mean temperature of the catch; Climate change; Size at first maturity; Population structure; Stock delineation; Natural tags; Purse seine fishery; Pelagic fish; Clupeidae
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Toxicology
WOS类目	Environmental Sciences ; Marine & Freshwater Biology ; Toxicology
WOS记录号	WOS:001230803200001
来源期刊	MARINE ENVIRONMENTAL RESEARCH
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302466
作者单位	Universidade do Vale do Itajai; Universidade do Vale do Itajai; Universidade do Porto
推荐引用方式 GB/T 7714	Schroeder, Rafael,Petermann, Angelica,Schwingel, Paulo R.,et al. Biological patterns of reproduction of the Brazilian sardine Sardinella brasiliensis in the purse seine fishery of Southwest Atlantic Ocean: A long-term assessment[J],2024,197.
APA	Schroeder, Rafael,Petermann, Angelica,Schwingel, Paulo R.,&Correia, Alberto T..(2024).Biological patterns of reproduction of the Brazilian sardine Sardinella brasiliensis in the purse seine fishery of Southwest Atlantic Ocean: A long-term assessment.MARINE ENVIRONMENTAL RESEARCH,197.
MLA	Schroeder, Rafael,et al."Biological patterns of reproduction of the Brazilian sardine Sardinella brasiliensis in the purse seine fishery of Southwest Atlantic Ocean: A long-term assessment".MARINE ENVIRONMENTAL RESEARCH 197(2024).