Diel Variation in Abundance and Size of the South American Red Shrimp Pleoticus Muelleri (Spence Bate, 1888) (Decapoda, Solenoceridae) in the Ubatuba Region, Southeastern Brazil

  • Mateus Lopes Universidade de São Paulo; Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (FFCLRP); Departamento de Biologia
  • Adilson Fransozo Universidade Estadual Paulista "Julio de Mesquita Filho"; Instituto de Biociências; Departamento de Zoologia
  • Antonio Leão Castilho Universidade Estadual Paulista "Julio de Mesquita Filho"; Instituto de Biociências; Departamento de Zoologia
  • Rogerio Caetano da Costa Universidade Estadual Paulista "Julio de Mesquita Filho"; Faculdade de Ciências; Departamento de Ciências Biológicas

Abstract

Diel variation in the abundance and size of Pleoticus muelleri in the Ubatuba region was investigated during 2000. During each season of the year, sampling was conducted during the day and at night at 8 depths, from 5 to 40 m. The estimated number of shrimp was 955 individuals, 272 collected during the day and 683 at night. There was a difference in the abundance of P. muelleri between day and night (χ², p=2.33E-40). The abundance during the day and at night differed by season with the exception of the spring (χ², p=0.06). The abundance during both periods also differed by depth, except at 15 and 30 m, where it was not significant (χ², p=0.84 and 0.06, respectively). The shrimp caught at night were generally smaller than those caught during the day (Kolmogorov-Smirnov, p<0.01). Pleoticus muelleri juveniles were found primarily at night. This tendency could have influenced the lower mean size for this period. The sediment type and the bottom temperature appear to influence the behavior of this species and consequently the catch rate during the periods analyzed.

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Published
2014-09-01
How to Cite
Lopes, M., Fransozo, A., Castilho, A., & Costa, R. (2014). Diel Variation in Abundance and Size of the South American Red Shrimp Pleoticus Muelleri (Spence Bate, 1888) (Decapoda, Solenoceridae) in the Ubatuba Region, Southeastern Brazil . Brazilian Journal of Oceanography, 62(3), 225-234. https://doi.org/10.1590/S1679-87592014067806203
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Articles