Ictiofauna associada a um cultivo de mexilhão Perna perna (Linnaeus, 1758) Norte Catarinense, Sul do Brasil

Abstract

During the months of October 2004 and June 2005, collections were made to identify the fish fauna associated with a culture of Perna perna mussel located in the district of Paulas, in the municipality of San Francisco do Sul, Santa Catarina State. It collected a total of 511 fish corresponding to seven species and six families (Blenniidae, Gobiidae, Labrisomidae, Serranidae, Gobiesocidae and Monacanthidae), the species Hypleurochilus fissicornis, Bathygobius soporator and Gobiesox strumosus being the most abundant. H. fissicornis was dominant in the samples and was present, along with G. strumusus, in all sampling months. B. soporator was not recorded in the month of October, and the remaining species occurred in two or three samplings, with the exception of the exotic specie Omobranchus punctatus, which occurred in a single sample (September 2005), corroborating its record in the area. The average values of biomass and abundance increased in the months near summer, with peak capture occurring in the month of January 2005. In the analysis of grouping by hand size, greater similarity was observed mainly in the hands sampled during the summer, which was observed with larger hand lengths. The cultivation of mussels creates a new substrate favorable to the occupation of several marine species by encouraging the growth and establishment of potentially competing, commercially important and/ or threatened species.