Population dynamics of shrimp Pleoticus muelleri in an upwelling region and new implications for latitudinal gradient theories

Autor(es)

Sancinetti, Gustavo S. ^[1] ; Castilho, Antonio L. ^[1] ; Wolf, Milena R. ^[1] ; Costa, Rogerio C. ^[2] ; Azevedo, Alexandre ^[3] ; Fransozo, Adilson ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ, UNESP, Inst Biosci Botucatu, Lab Carcinol NEBECC, Dept Zool, Grp Studies Crustacean Biol Ecol & Cult, BR-18618689 Botucatu, SP - Brazil

^[2] Sao Paulo State Univ, UNESP, Dept Biol Sci, Fac Sci, Lab Biol Marine & Freshwater Shrimp LABCA, BR-17033360 Bauru, SP - Brazil

^[3] Univ Fed Rio de Janeiro, Nucleus Ecol & Environm Dev Macae NUPEM, BR-27965045 Macae, RJ - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Marine Biological Association of the United Kingdom; v. 99, n. 8, p. 1807-1815, DEC 2019.
• Citações Web of Science: 0

Resumo

The population dynamics of shrimp Pleoticus muelleri was used as a model to verify if the trend of continuous reproduction periodicity, shorter body size and longevity, and early sexual maturity found in tropical regions is corroborated in upwelling regions. Shrimps were sampled in a region under the influence of upwelling (northern coast of Rio de Janeiro State, Brazil). Characteristics of bottom water were registered, and shrimps were measured (carapace length - CL) and classified by sex and gonadal development stages. Reproduction was seasonal, from September to December, and favoured by water mass intrusions of low temperatures and high chlorophyll concentrations. The greatest number of reproductive females preceded periods with the highest chlorophyll concentrations in the water column (cross-correlation; P < 0.05, lag (month) = -3, r = 0.50), suggesting greater developmental success of larval stage due to increase of food availability. Von Bertalanffy growth models resulted in asymptotic carapace length estimates of CL infinity = 40.21 mm and CL infinity = 36.78 mm for females and males, respectively. The reproductive and growth characteristics of the P. muelleri population studied herein were similar to that of populations from higher latitudes, demonstrating that the latitudinal pattern rule cannot be applied in regions influenced by an upwelling phenomenon. (AU)

• Processo FAPESP: 09/54672-4 - Biologia reprodutiva e dinâmica populacional dos camarões Penaeoidea (Crustacea, Decapoda) em duas regiões do sudeste brasileiro: efeito latitudinal e proposta para o período de defeso
• Beneficiário: Rogério Caetano da Costa
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 10/50188-8 - Crustáceos decápodes: multidisciplinaridade na caracterização da biodiversidade marinha do estado de São Paulo (taxonomia, espermiotaxonomia, biologia molecular e dinâmica populacional) (Biodiversidade Marinha)
• Beneficiário: Fernando Luis Medina Mantelatto
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático