publication . Article . 2000

The dynamics of fish populations in the Palancar stream,a small tributary of the river Guadalquivir, Spain

J. A. Hernando; Noelia Villar; Ramón Bravo; Mila C. Soriguer;
Open Access English
  • Published: 20 Nov 2000
  • Country: Spain
Abstract
Abstract The relationship between flooding and changes in the size distribution of fish populations in the Palancar stream confirms observations in other rivers. On average, density decreased by 36.2 % and biomass increased by 14.5 %, passing from a period of severe drought to one of heavier than normal rains. Precipitation is the most important of the many factors affecting the populations of the Palancar stream; the most evident changes all occurred after the drought. During the drought period, the marked seasonal fluctuation in flow was the most important factor regulating the population dynamics. Fish density and biomass varied in proportion to the water vol...
Subjects
free text keywords: Barbus sclateri, biomass, Cobitis paludica, density, Leuciscus pyrenaicus, Ecology, Evolution, Behavior and Systematics, Nature and Landscape Conservation, biology.organism_classification, biology, Predation, Population density, Ecology, Micropterus, Spatial distribution, Population, education.field_of_study, education, Tributary, geography.geographical_feature_category, geography, Seasonality, medicine.disease, medicine
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