Distribución y densidad de la trucha Oncorhynchus mykiss (Salmoniformes: Salmonidae) en los Andes venezolanos

Spatial distribution and relative abundance of wild rainbow trout populations were studied in 68 stations located between 500 and 4000 masl in seven hydrologica1 basins of tbe most important Andean rivers of Venezuela during a year of sampling. A total of 6 12 individuals were obtained aboye 1700 m,...

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Main Authors:	Péfaur, Jaime E, Sierra, Nancy M
Format:	Online
Language:	spa
Published:	Universidad de Costa Rica 1998
Online Access:	https://revistas.ucr.ac.cr/index.php/rbt/article/view/20453

id	RBT20453
record_format	ojs
spelling	RBT204532022-05-25T20:59:13Z Distribución y densidad de la trucha Oncorhynchus mykiss (Salmoniformes: Salmonidae) en los Andes venezolanos Distribución y densidad de la trucha Oncorhynchus mykiss (Salmoniformes: Salmonidae) en los Andes venezolanos Péfaur, Jaime E Sierra, Nancy M rainbow trout oncorhynchus mykiss andean rivers hydrological gasins altitudinal distribution Spatial distribution and relative abundance of wild rainbow trout populations were studied in 68 stations located between 500 and 4000 masl in seven hydrologica1 basins of tbe most important Andean rivers of Venezuela during a year of sampling. A total of 6 12 individuals were obtained aboye 1700 m, Most fishes were obtained from tbe Chama (43%),M otatán (21% ) and Santo Domingo (32%) rivers,v ery few in the Negro ( 1.75%) and La Grita (0,33%) rivers,a nd none in tbe Escalante and Mocotíes rivers basins. Adult males were more abundant than females in a 2.15: 1 proportion. Juveniles made a 56.7% of captures,w itb a proportion of 1.30 juveniles per adult, Individual sizes varied from 2.0 to 21.8 cm,m ost within tbe interval 5.1 - 10.0 cm; tbe weight of specimens also showed an ample variation, with a maximum of 317,0 g. Spatial distribution and relative abundance of wild rainbow trout populations were studied in 68 stations located between 500 and 4000 masl in seven hydrologica1 basins of tbe most important Andean rivers of Venezuela during a year of sampling. A total of 6 12 individuals were obtained aboye 1700 m, Most fishes were obtained from tbe Chama (43%),M otatán (21% ) and Santo Domingo (32%) rivers,v ery few in the Negro ( 1.75%) and La Grita (0,33%) rivers,a nd none in tbe Escalante and Mocotíes rivers basins. Adult males were more abundant than females in a 2.15: 1 proportion. Juveniles made a 56.7% of captures,w itb a proportion of 1.30 juveniles per adult, Individual sizes varied from 2.0 to 21.8 cm,m ost within tbe interval 5.1 - 10.0 cm; tbe weight of specimens also showed an ample variation, with a maximum of 317,0 g. Universidad de Costa Rica 1998-09-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article application/pdf https://revistas.ucr.ac.cr/index.php/rbt/article/view/20453 10.15517/rbt.v46i3.20453 Revista de Biología Tropical; Vol. 46 No. 3 (1998): Volume 46 – Regular number 3 – September 1998; 775–782 Revista de Biología Tropical; Vol. 46 Núm. 3 (1998): Volumen 46 – Volumen regular 3 – Setiembre 1998; 775–782 Revista Biología Tropical; Vol. 46 N.º 3 (1998): Volume 46 – Regular number 3 – September 1998; 775–782 2215-2075 0034-7744 10.15517/rbt.v46i3 spa https://revistas.ucr.ac.cr/index.php/rbt/article/view/20453/20681 Copyright (c) 1998 Revista de Biología Tropical http://creativecommons.org/licenses/by/4.0
institution	Universidad de Costa Rica
collection	Revista de Biología Tropical
language	spa
format	Online
author	Péfaur, Jaime E Sierra, Nancy M
spellingShingle	Péfaur, Jaime E Sierra, Nancy M Distribución y densidad de la trucha Oncorhynchus mykiss (Salmoniformes: Salmonidae) en los Andes venezolanos
author_facet	Péfaur, Jaime E Sierra, Nancy M
author_sort	Péfaur, Jaime E
description	Spatial distribution and relative abundance of wild rainbow trout populations were studied in 68 stations located between 500 and 4000 masl in seven hydrologica1 basins of tbe most important Andean rivers of Venezuela during a year of sampling. A total of 6 12 individuals were obtained aboye 1700 m, Most fishes were obtained from tbe Chama (43%),M otatán (21% ) and Santo Domingo (32%) rivers,v ery few in the Negro ( 1.75%) and La Grita (0,33%) rivers,a nd none in tbe Escalante and Mocotíes rivers basins. Adult males were more abundant than females in a 2.15: 1 proportion. Juveniles made a 56.7% of captures,w itb a proportion of 1.30 juveniles per adult, Individual sizes varied from 2.0 to 21.8 cm,m ost within tbe interval 5.1 - 10.0 cm; tbe weight of specimens also showed an ample variation, with a maximum of 317,0 g.
title	Distribución y densidad de la trucha Oncorhynchus mykiss (Salmoniformes: Salmonidae) en los Andes venezolanos
title_short	Distribución y densidad de la trucha Oncorhynchus mykiss (Salmoniformes: Salmonidae) en los Andes venezolanos
title_full	Distribución y densidad de la trucha Oncorhynchus mykiss (Salmoniformes: Salmonidae) en los Andes venezolanos
title_fullStr	Distribución y densidad de la trucha Oncorhynchus mykiss (Salmoniformes: Salmonidae) en los Andes venezolanos
title_full_unstemmed	Distribución y densidad de la trucha Oncorhynchus mykiss (Salmoniformes: Salmonidae) en los Andes venezolanos
title_sort	distribución y densidad de la trucha oncorhynchus mykiss (salmoniformes: salmonidae) en los andes venezolanos
title_alt	Distribución y densidad de la trucha Oncorhynchus mykiss (Salmoniformes: Salmonidae) en los Andes venezolanos
publisher	Universidad de Costa Rica
publishDate	1998
url	https://revistas.ucr.ac.cr/index.php/rbt/article/view/20453
work_keys_str_mv	AT pefaurjaimee distribucionydensidaddelatruchaoncorhynchusmykisssalmoniformessalmonidaeenlosandesvenezolanos AT sierranancym distribucionydensidaddelatruchaoncorhynchusmykisssalmoniformessalmonidaeenlosandesvenezolanos
_version_	1810114815393267712

Distribución y densidad de la trucha Oncorhynchus mykiss (Salmoniformes: Salmonidae) en los Andes venezolanos

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