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Population structure of Sinelobus cf. stanfordi (Crustacea, Tanaidacea) from Pinheiros River mangrove, Guaratuba Bay, southern Brazil

Published online by Cambridge University Press:  01 March 2016

A. D. Kassuga ,
A. Marafon-Almeida  and
S. Masunari
A. D. Kassuga*
Affiliation:
Base Oceanográfica de Aracruz – UFES, Universidade Federal do Espírito Santo, Vitória, Espírito Santo, Brazil
A. Marafon-Almeida
Affiliation:
Base Oceanográfica de Aracruz – UFES, Universidade Federal do Espírito Santo, Vitória, Espírito Santo, Brazil
S. Masunari
Affiliation:
Departamento de Zoologia – UFPR, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
*
Correspondence should be addressed to:A. D. Kassuga, Base Oceanográfica de Aracruz – UFES, Universidade Federal do Espírito Santo, Vitória, Espírito Santo, Brazil email: [email protected]
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Abstract

An analysis of the population structure of the tanaid Sinelobus cf. stanfordi was performed at Pinheiros River mangrove, Guaratuba Bay, Paraná State, southern Brazil (25°49′S 48°34′W). Fifteen samples of 12 × 12 cm were obtained bimonthly from the surface of galleries (interconnected burrow complex) constructed by the adult mangrove crab Ucides cordatus from June 2007 to April 2008. The carapace length (CL) of a total of 714 tanaids was measured. Tanaids were divided into four demographic categories: males (M), ovigerous females (OV), preparatory females (PREP) and non-reproductive individuals (NREP) with a mean CL of 0.55, 0.49, 0.48 and 0.43 mm, respectively. In the NREP group, specimens smaller than 0.32 mm were classified as juveniles. NREP predominated in all sampling months, and among sexually mature individuals, a strong predominance of females was observed throughout the study period. Temporal fluctuations in abundance were observed, with a peak in August 2007. The reproductive period of this species is continuous, with a peak in the summer, like most S. cf. stanfordi populations.

Keywords

Tanaidaepopulation structuremangrove swampGuaratuba Bay
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 97 , Issue 2 , March 2017 , pp. 243 - 247
Copyright
Copyright © Marine Biological Association of the United Kingdom 2016 

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