INVESTIGADORES
DIAZ DE ASTARLOA Juan Martin
artículos
Título:
Fish abundance and distribution patterns related to environmental factors in a choked temperate coastal lagoon (Argentina)
Autor/es:
BRUNO, D.; BARBINI, S. A.; DÍAZ DE ASTARLOA, J.M.; MARTOS, P.
Revista:
BRAZILIAN JOURNAL OF OCEANOGRAPHY
Editorial:
INST OCEANOGRAFICO
Referencias:
Lugar: São Paulo; Año: 2013 vol. 61 p. 43 - 53
ISSN:
1679-8759
Resumen:
Objectives: The aim of this study was to assess the influence of environmental factors on the fish
distribution and abundance in Mar Chiquita coastal lagoon. Methods: 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. Results: 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: 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. 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.
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. 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.
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. 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.
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. 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.