%0 Journal Article
%T Population and feeding structure of Steindachnerina notonota Miranda-Ribeiro, 1937 (Actinopterygii, Characiformes, Curimatidae) in Tapero¨¢ II dam, semi-arid region of Para¨ªba, Brazil Estrutura populacional e alimentar de Steindachnerina notonota Miranda Ribeiro, 1937 (Actinopterygii, Characiformes, Curimatidae) no A ude Tapero¨¢ II, na regi o do semi-¨¢rido da Para¨ªba, Brasil
%A Ana Karla Araujo Montenegro
%A Jane Enisa Ribeiro Torelli
%A Maria Cristina Crispim
%A Ana Maria Alves Medeiros
%J Acta Limnologica Brasiliensia
%D 2011
%I 
%X AIM: The present study investigated population structure, weight-length relationships, sex ratio and associations between feeding activity and reproductive period, diet and alimentary regime of Steindachnerina notonota at Tapero¨¢ II dam, semi-arid region of Para¨ªba State. METHODS: The region has the lowest pluviometric rates of Brazil. Fishes were collected during six sampling periods (October and December/2005, and March, June, August and October of 2006) encompassing two dry periods, and one rainy period. Cast, seine and gill nets were used to collect the individuals. RESULTS: Throughout the study period 120 individuals were collected, with total length ranging between 2.2 and 10.7 cm and weight between 0.31 and 43.1 g. A recruitment period, identified due to a higher abundance of small individuals in the population, was observed in the beginning of the rainy period of 2006, lasting until the beginning of the dry season. S. notonota showed a negative allometric growth type, i.e., individuals 'elongate' during their development. A significantly higher proportion of females were observed throughout the study period. The relationship between feeding and reproductive activities were not significant, given that individuals showed high feeding rates regardless of the intensity of their reproductive activities. Although the diet of S. notonota comprised several items such as plant debris, eggs, organic matter, phytoplankton, zooplankton, Nematoda, Ostracada, Conchostraca, among others, the most important feeding item was detritus, suggesting a predominant detritivirous feeding habit. CONCLUSIONS: Biological aspects of S. notonota observed in the present study suggest that this species has potential to attain great population sizes, as consequence of both diet and feeding dynamics, as well as its reproductive characteristics and growth type. OBJETIVO: O presente estudo investigou a estrutura da popula  o, a rela  o peso-comprimento, a raz o sexual, as associa  es entre atividade alimentar e per¨ªodo de reprodu  o, dieta e regime alimentar de Steindachnerina notonota, no a ude Tapero¨¢ II, semi-¨¢rido paraibano. M¨¦TODOS: A regi o tem os menores ¨ªndices pluviom¨¦tricos do Brasil. Os peixes foram coletados em seis amostragens (Outubro e Dezembro de 2005, e Mar o, Junho, Agosto e Outubro de 2006), compreendendo 2 per¨ªodos de estiagem e 1 chuvoso. Para a captura dos exemplares, utilizou-se tarrafa, redes de espera e de arrasto. RESULTADOS: Ao longo do estudo capturou-se um total de 120 indiv¨ªduos, que mediram entre 2,2 e 10,7 cm de comprimento total e pesaram de 0,31 a
%K dieta
%K Curimatidae
%K estrutura populacional
%K semi-¨¢rido
%K peixes
%K diet
%K Curimatidae
%K population structure
%K semi-arid
%K fishes
%U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2011000300003