%0 Journal Article
%T Fish abundance and distribution patterns related to environmental factors in a choked temperate coastal lagoon (Argentina)
%A Daniel Osvaldo Bruno
%A Santiago Aldo Barbini
%A Juan Mart¨ªn D¨ªaz de Astarloa
%A Patricia Martos
%J Brazilian Journal of Oceanography
%D 2013
%I Universidade de S?o Paulo
%X The aim of this study was to assess the influence of environmental factors on the fish distribution and abundance in Mar Chiquita coastal lagoon. Seasonal fish sampling stations were distributed along the lagoon and grouped in three zones from a mixo-oligohaline waters zone with high contribution of freshwater to a mixo-eurihaline waters zone with high marine water influence. A mixo-mesohaline waters zone characterized the middle part of the lagoon. The results showed that the fish composition was dominated by marine estuarine dependent (ED) species in all three zones and in all seasons: Odontesthes argentinensis, Brevoortia aurea, Mugil liza and Micropogonias furnieri were the most representative species. The following important ecological category was freshwater fishes (FW), with Platanichthys platana and Jenynsia multidentata being the most representative species. According to the best model selected, by fitting generalized linear models, abundance of ED increased as water temperature increased during summer and autumn in all three zones. The highest abundance was recorded in the mixo-eurihaline waters zone. On the other hand, FW abundance increased with high rainfall and also when easterly winds blew. In conclusion, a differential habitat use by the species that occur in the Mar Chiquita coastal lagoon was observed. A few ED species dominated the fish composition but FW species also made use of the lagoon during periods of heavy rainfall. O objetivo deste estudo foi avaliar a influ¨ºncia de fatores ambientais sobre a distribui  o e abundancia de peixes na lagoa costeira Mar Chiquita. Esta  es sazonais de amostragem de peixes foram distribu¨ªdas ao longo da lagoa e agrupadas em tr¨ºs zonas de uma zona de ¨¢guas Mixo-oligohalino com elevado aporte de ¨¢gua doce para uma zona de ¨¢guas Mixo-eurihaline com alta influ¨ºncia da ¨¢gua do mar. Uma zona de ¨¢guas Mixo-mesohalino caracteriza a parte do meio da lagoa. Os resultados mostraram que a composi  o dos peixes foi dominada por esp¨¦cies marinhos estuarinos dependentes (ED) em todas as tr¨ºs zonas e em todas as esta  es: Odontesthes argentinensis, Brevoortia aurea, Mugil liza e Micropogonias furnieri foram as esp¨¦cies mais representativas. A categoria seguinte mais importante foi peixes de ¨¢gua doce (FW), com Platanichthys platana e Jenynsia multidentata sendo as esp¨¦cies mais representativas. De acordo com o melhor modelo selecionado pelo ajuste de modelos lineares generalizados, a abundancia de ED aumentou de acordo com a temperatura da ¨¢gua durante o ver o e outono, em todas as tr¨ºs zonas. A maior abundancia f
%K Padr es de distribui  o de peixes
%K Ambientes estuarinos
%K Modelos lineares generalizados
%K Lagoa costeira Mar Chiquita
%K Fish distribution patterns
%K Estuarine environments
%K Generalized linear models
%K Mar Chiquita coastal lagoon
%U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592013000100005