Population features of Hoplosternum littorale (Hancock, 1828) (Siluriformes, Callichthyidae) at Santo Anastacio Reservoir, Brazil

ABSTRACTObjective. The length-weight relationship and condition factor of fish are indicators of physiological well-being and may be related to reproduction and feeding periods. These attributes were evaluated for a population of Hoplosternum littorale sampled in the Santo Anastácio Reservoir (Forta...

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Published inRevista MVZ Córdoba Vol. 18; no. 3; pp. 3767 - 3772
Main Authors Do Nascimento Chaves, Francisco D., Sánchez-Botero, Jorge I., Sequeira Garcez, Danielle, Cavalcanti dos Reis, Vitor
Format Journal Article
LanguageEnglish
Published Universidad de Córdoba - Facultad de Medicina Veterinaria y Zootecnia 01.09.2013
Universidad de Córdoba
Subjects
AGRICULTURE, DAIRY & ANIMAL SCIENCE
Alimentación
Brown hoplo
feeding
Freshwater
health
Hoplosternum littorale
reproducción
reproduction
reservoir
reservorio
salud
Brazil, Ceara
Alimentación
reproducción
feeding
health
Brown hoplo
reservoir
reservorio
reproduction
salud
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Summary:ABSTRACTObjective. The length-weight relationship and condition factor of fish are indicators of physiological well-being and may be related to reproduction and feeding periods. These attributes were evaluated for a population of Hoplosternum littorale sampled in the Santo Anastácio Reservoir (Fortaleza, Northeastern Brazil). Materials and methods. One hundred and fifty-five specimens were collected with gillnets between October 2009 and March 2010, and standard length (cm), total weight (g), sex and gonadal maturation stage were registered. Results. The observed length-weight relationship indicated negative allometric adjustment (2.72). Only seventy individuals were evaluated for the condition factor analysis, sexual determination and gonadal state classification. Condition factor values peaked in November and plummeted in February, no statistical differences in sex ratio (χ²=13.683; p=0.057) were observed. Mature females were collected throughout the study period. Conclusions. The results indicate that the population of H. littorale in the Santo Anastácio reservoir presents growth deficiency and changes in reproductive strategy in this hypereutrophic environment.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ObjectType-Statistics/Data Report-1
ISSN:0122-0268
1909-0544
1909-0544
DOI:10.21897/rmvz.146