Assessment of trout populations inhabiting the Palena River, southern Chile

ABSTRACT A survey of trout species was carried out to assess the trout stocks' quality inhabiting the Palena River Basin, one of the most important rivers for recreational angling in Chilean Patagonia. Six sampling campaigns were carried out over 16 selected stretches of the river between Febru...

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Autores principales:	Bravo,Sandra, Whelan,Ken, Silva,María Teresa
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2021
Materias:	Oncorhynchus mykiss Salmo trutta Salvelinus fontinalis trout population structure feeding habits Chilean Patagonia
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2021000100029
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spelling	oai:scielo:S0718-560X20210001000292021-03-22Assessment of trout populations inhabiting the Palena River, southern ChileBravo,SandraWhelan,KenSilva,María Teresa Oncorhynchus mykiss Salmo trutta Salvelinus fontinalis trout population structure feeding habits Chilean Patagonia ABSTRACT A survey of trout species was carried out to assess the trout stocks' quality inhabiting the Palena River Basin, one of the most important rivers for recreational angling in Chilean Patagonia. Six sampling campaigns were carried out over 16 selected stretches of the river between February 2012 and June 2013. A total of 912 trout were collected, 57% rainbow trout (Oncorhynchus mykiss), 33.3% brown trout (Salmo trutta), and 9.6% brook trout (Salvelinus fontinalis). Also, one tiger trout (Salmo trutta × Salvelinus fontinalis) (a hybrid between brown and brook trout) was recorded. Results showed that both rainbow trout and brown trout shared the same reaches of the river, with very similar feeding habits, while brook trout inhabited smaller and more enclosed streams. Maturity stages (V-VI) were recorded from the fish sampled over the period spring-summer-autumn in the case of rainbow trout; autumn-winter for brook trout, and summer-autumn for brook trout. One of the study's most notable features was the small size of the mature brook trout, reaching 17.5 cm in length for gravid females and 12.4 cm for mature males at age 2+. The maximum age recorded for rainbow and brown trout was 6+, with a maximum length of 69.8 and 58.5cm, respectively, while for brook trout, the maximum age recorded was 3+ for a female with a length of 29.9 cm length and 2+ for a male of 16.6 cm.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.49 n.1 20212021-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2021000100029en10.3856/vol49-issue1-fulltext-2577
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Oncorhynchus mykiss Salmo trutta Salvelinus fontinalis trout population structure feeding habits Chilean Patagonia
spellingShingle	Oncorhynchus mykiss Salmo trutta Salvelinus fontinalis trout population structure feeding habits Chilean Patagonia Bravo,Sandra Whelan,Ken Silva,María Teresa Assessment of trout populations inhabiting the Palena River, southern Chile
description	ABSTRACT A survey of trout species was carried out to assess the trout stocks' quality inhabiting the Palena River Basin, one of the most important rivers for recreational angling in Chilean Patagonia. Six sampling campaigns were carried out over 16 selected stretches of the river between February 2012 and June 2013. A total of 912 trout were collected, 57% rainbow trout (Oncorhynchus mykiss), 33.3% brown trout (Salmo trutta), and 9.6% brook trout (Salvelinus fontinalis). Also, one tiger trout (Salmo trutta × Salvelinus fontinalis) (a hybrid between brown and brook trout) was recorded. Results showed that both rainbow trout and brown trout shared the same reaches of the river, with very similar feeding habits, while brook trout inhabited smaller and more enclosed streams. Maturity stages (V-VI) were recorded from the fish sampled over the period spring-summer-autumn in the case of rainbow trout; autumn-winter for brook trout, and summer-autumn for brook trout. One of the study's most notable features was the small size of the mature brook trout, reaching 17.5 cm in length for gravid females and 12.4 cm for mature males at age 2+. The maximum age recorded for rainbow and brown trout was 6+, with a maximum length of 69.8 and 58.5cm, respectively, while for brook trout, the maximum age recorded was 3+ for a female with a length of 29.9 cm length and 2+ for a male of 16.6 cm.
author	Bravo,Sandra Whelan,Ken Silva,María Teresa
author_facet	Bravo,Sandra Whelan,Ken Silva,María Teresa
author_sort	Bravo,Sandra
title	Assessment of trout populations inhabiting the Palena River, southern Chile
title_short	Assessment of trout populations inhabiting the Palena River, southern Chile
title_full	Assessment of trout populations inhabiting the Palena River, southern Chile
title_fullStr	Assessment of trout populations inhabiting the Palena River, southern Chile
title_full_unstemmed	Assessment of trout populations inhabiting the Palena River, southern Chile
title_sort	assessment of trout populations inhabiting the palena river, southern chile
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2021
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2021000100029
work_keys_str_mv	AT bravosandra assessmentoftroutpopulationsinhabitingthepalenariversouthernchile AT whelanken assessmentoftroutpopulationsinhabitingthepalenariversouthernchile AT silvamariateresa assessmentoftroutpopulationsinhabitingthepalenariversouthernchile
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Assessment of trout populations inhabiting the Palena River, southern Chile

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