Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
The dynamics of fish populations in the Palancar stream, a small tributaryof the river Guadalquivir, Spain
Autore:
Bravo, R; Soriguer, MC; Villar, N; Hernando, JA;
Indirizzi:
Univ Cadiz, Fac Ciencias Mar, Dept Biol Anim Biol Vegetal & Ecol, Cadiz 11510, Spain Univ Cadiz Cadiz Spain 11510 nim Biol Vegetal & Ecol, Cadiz 11510, Spain
Titolo Testata:
ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY
fascicolo: 1, volume: 22, anno: 2001,
pagine: 9 - 20
SICI:
1146-609X(200101/02)22:1<9:TDOFPI>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
COW GREEN RESERVOIR; REGIMEN SW SPAIN; COMMUNITY STRUCTURE; BARBUS-SCLATERI; IMPOUNDMENT; CYPRINIDS; GROWTH; AGE;
Keywords:
Barbus sclateri; biomass; Cobitis paludica; density; leuciscus pyrenaicus;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Bravo, R Univ Cadiz, Fac Ciencias Mar, Dept Biol Anim Biol Vegetal & Ecol,Apdo 40,Cadiz 11510, Spain Univ Cadiz Apdo 40 Cadiz Spain 11510 Apdo 40,Cadiz 11510, Spain
Citazione:
R. Bravo et al., "The dynamics of fish populations in the Palancar stream, a small tributaryof the river Guadalquivir, Spain", ACTA OECOL, 22(1), 2001, pp. 9-20

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 fluctuationin flow was the most important factor regulating the population dynamics. Fish density and biomass varied in proportion to the water volume. During the rainy period, the studied section of the river was found to be an important reproduction and nursery area, with juveniles and individuals of reproduction age dominating. The presence of Micropterus salmoides, an introducedpiscivorous species, is another factor affecting the population dynamics in the Palancar stream. The observed absence of age 0+ individuals of the dominant populations is considered a direct effect of predation. (C) 2001 Editions scientifiques et medicales Elsevier SAS.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 05:37:46