Spatial and temporal distribution of curvina larvae (Plagioscion squamosissimus HECKEL, 1840) and its relationship to some environmental variables in the upper Paraná River floodplain, Brazil
Braz. j. biol
; Braz. j. biol;63(3): 381-391, Aug. 2003. mapas, tab, graf
Article
de En
| LILACS
| ID: lil-353961
Bibliothèque responsable:
BR1.1
RESUMO
With the objective of studying the spatial and temporal distribution of ''curvina'' Plagioscion squamosissimus larvae and verifying respective spawning sites, monthly sampling was carried out from March 1993 to February 1994 on the Upper Paraná River floodplain. Using a conical-cylindrical plankton net (0.5 mm mesh), samples were taken from the surface of the water bodies, and in the marginal vegetation a strainer and a dragnet (''picaré'') were used. Water samples were collected for environmental variable analysis (temperature, dissolved oxygen, water pH, and electrical conductivity). Water level data were obtained from hydrometric stations. High average density of larvae was found from December 1993 to February 1994 due to high temperature and water level. The Baía sub-area was shown to be the most important in the larvae catch, probably due to its semi-lotic characteristics. Larvae size distribution was shown to be more frequent in the 4.0 mm standard length class, indicating that the sampling stations were next to the spawning sites.
Texte intégral:
1
Indice:
LILACS
Sujet Principal:
Perciformes
/
Écosystème
Limites du sujet:
Animals
Pays comme sujet:
America do sul
/
Brasil
langue:
En
Texte intégral:
Braz. j. biol
Thème du journal:
BIOLOGIA
Année:
2003
Type:
Article