Distribution of cichlid fishes in the littoral of Lake Bacalar, Yucatan Peninsula

The distribution of cichlids in Lake Bacalar was assessed from January to September 1996, in eight shallow-water (< 2 m) stations, using a 20 m long seine net. Temperature, salinity/conductivity and dissolved oxygen were sensor-obtained; depth, submerged vegetation and bottom type were determined...

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Bibliographic Details
Published in:Environmental biology of fishes 1999, Vol.54 (1), p.35-43
Main Authors: GAMBOA-PEREZ, H. C, SCHMITTER-SOTO, J. J
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Aquatic ecosystems
Biogeography
Biological and medical sciences
Cichlidae
Dissolved oxygen
Fish
Fresh water ecosystems
Freshwater
Fundamental and applied biological sciences. Psychology
Lakes
Organic matter
Pisces
Shallow water
Submerged plants
Synecology
Vegetation
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Summary:The distribution of cichlids in Lake Bacalar was assessed from January to September 1996, in eight shallow-water (< 2 m) stations, using a 20 m long seine net. Temperature, salinity/conductivity and dissolved oxygen were sensor-obtained; depth, submerged vegetation and bottom type were determined by visual inspection. Affinities between stations, based on fish abundance and environmental parameters, were analyzed by multivariate methods. Littoral of Bacalar town was the site with highest richness, diversity and abundance, probably promoted by the additional urban waste of organic matter. PCA defined two station-groups, one associated with muddy substrates, the other one with rocky/sandy bottoms. Cichlids are more abundant over muddy bottoms with abundant submerged vegetation, probably because of the abundance of prey and shelter.[PUBLICATION ABSTRACT]
ISSN:0378-1909
1573-5133
DOI:10.1023/a:1007443408776