Affiliation:
1. Universidade Estadual de Mato Grosso do Sul, Brasil
Abstract
Abstract This work aimed to describe the reproductive biology of Hypoptopoma inexspectatum in southern Pantanal. A total of 538 individuals were sampled and analyzed from February 2009 through January 2011 in southern Pantanal. We did not observe differences in sex-ratio, and both sexes presented positive allometric length/weight relationship (LWR). Reproduction occurs mainly from January to February. Females reached first maturation (L50) with 37.80 mm and males with 45.80 mm. Absolute fecundity is estimated in mean=177.43 (sd±127.06) oocytes and relative fecundity in 3.12 (sd±2.23) oocytes/mg. Fecundity is positively correlated with standard length (Spearman r= 0.43; p=0.013), and total spawning is a used spawning strategy for H. inexspectatum.
Subject
General Agricultural and Biological Sciences
Reference46 articles.
1. Seasonal Pantanal flood pulse: implications for biodiversity conservation: a review;ALHO C.;Oecologia Australis,2011
2. Spawning induction and fecundity of commercial native fish species from the São Francisco River basin, Brazil, under hatchery conditions;ARANTES F.P.;Agricultural Sciences,2013
3. Temporal dynamics of reproduction of the Neotropical fish, Crenicichla menezesi (Perciformes: cichlidae);ARAUJO A.S.;The Scientific World Journal,2012
4. Reproductive characteristics of characid fish species (Teleostei, Characiformes) and their relationship with body size and phylogeny;AZEVEDO M.A.;Iheringia: Série Zoologia,2010
5. Influence of the flood regime on the reproduction of fish species with different reproductive strategies in the Cuiabá River, Upper Pantanal, Brazil;BAILLY D.;River Research and Applications,2008