Occurrence of the amphipod Leucothoe spinicarpa (Abildgaard, 1789) (Amphipoda) in the ascidian Phallusia nigra (Urochordata, Ascidiacea) in Southeastern Brazil
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Solitary ascidians are stable microhabitats potentially favorable for feeding, shelter and reproduction of amphipods. The occurrence and size range of Leucothoe spinicarpa,the symbiotic species of the solitary ascidian Phallusia nigra, was evaluated at Praia da Enseada, Ubatuba, Northern coast of São Paulo State. The amphipods, collected from the ascidians pharyngeal basket or atrium, were measured and sexed, and the ascidians were weighed. Juveniles, males and females were separated by differences in the excavations on the palm margin of gnathopods 2. The number of amphipods in each ascidian varied and there were few adults in opposition to a high number of juveniles. Males and females did not show difference in body size, but sexual dimorphism based on excavation of gnathopod and dactylus proportion was presented. Also, the ascidian weight was related with the number of associated adult amphipods but not with the juveniles. The high number and size range distribution of juveniles, the low number of ovigerous females, and even the presence of single adult in the ascidians, suggest the possibility of extended parental care.
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CANTOR, Mauricio, Silvana Gomes LEITE SIQUEIRA, Gabriela Torres CRUVINEL, Fosca Pereira PEDINI LEITE, 2009. Occurrence of the amphipod Leucothoe spinicarpa (Abildgaard, 1789) (Amphipoda) in the ascidian Phallusia nigra (Urochordata, Ascidiacea) in Southeastern Brazil. In: Nauplius: the Journal of the Brazilian Crustacean Society. Sociedade Brasileira de Carcinologia. 2009, 17(1), pp. 13-17. ISSN 0104-6497. eISSN 2358-2936BibTex
@article{Cantor2009Occur-50430,
year={2009},
title={Occurrence of the amphipod Leucothoe spinicarpa (Abildgaard, 1789) (Amphipoda) in the ascidian Phallusia nigra (Urochordata, Ascidiacea) in Southeastern Brazil},
number={1},
volume={17},
issn={0104-6497},
journal={Nauplius: the Journal of the Brazilian Crustacean Society},
pages={13--17},
author={Cantor, Mauricio and Leite Siqueira, Silvana Gomes and Cruvinel, Gabriela Torres and Pedini Leite, Fosca Pereira}
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