Journal
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
Volume 87, Issue 4, Pages 2123-2138Publisher
ACAD BRASILEIRA DE CIENCIAS
DOI: 10.1590/0001-3765201520140698
Keywords
habitat selection; latitudinal variation; longevity; Penaeoidea; reproductive dynamics
Categories
Funding
- Fundacao para o Desenvolvimento da UNESP [01214/2010-DFP]
- Fundacao de Amparo a Pesquisa do Estado de Salo Paulo (FAPESP) [94/4878-8, 98/07090-3, 07/56733-5, 09/54672-4, 2010/50188-8]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Ciencias do Mar (CAPES - CIMAR) [23038.004310/2014-85]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [PQ 306304/2008-2, PQ 308653/2014-9]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [09/54672-4, 10/50188-8, 98/07090-3] Funding Source: FAPESP
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The present study investigated the growth, longevity and reproductive dynamics of Artemesia longinaris in the southeastern coast of Brazil over a two-year period. Monthly collections were conducted in Ubatuba and Caraguatatuba using a shrimp fishing boat equipped with double-rig nets. Each region was divided into 7 sampling stations up to 35 m deep. Size frequency distributions, growth, longevity, sex ratio, and abundance of individuals in each demographic class, were compared. The relationship between abiotic factors and abundance of each demographic class was assessed using a Canonical Correlation Analysis. A total of 64,641 individuals were collected (6,928 measured) with an estimated longevity of 1.30 (Ubatuba) and 1.14 (Caraguatatuba) years for females and 1.03 years for males in both regions. There was a statistically significant bias in sex ratio toward females (Chi-squared test, p < 0.05) in both regions. The Canonical Correlation Analysis resulted in a canonical correlation coefficient of 0.31 (p = 0.00002). Salinity and temperature showed high correlation mainly with the presence of reproductive females. In general, this demographic class was most common in conditions of low temperature and high salinity. These findings, as well as other studies carried out in colder regions with the same species, are consistent with classical latitudinal paradigm.
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