Age, growth and natural mortality of the Patagonian sprat Sprattus fuegensis (Jenyns, 1842) in Chiloé inland sea, southern Chile

Growth parameters (L∞, K, and t0) and natural mortality of the Patagonian sprat (Sprattus fuegensis) Chiloé inland sea were estimated. This area corresponds to the northern limit of the species distribution in the South Pacific Ocean. A total of 1,584 otolith were analyzed between July 200...

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Autores principales:	Cerna,Francisco, Leal,Elson, López,Amalia, Plaza,Guido
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2014
Materias:	Sprattus fuegensis otolith growth mortality distribution Chiloé inland sea southern Chile
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000300015
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spelling	oai:scielo:S0718-560X20140003000152014-10-10Age, growth and natural mortality of the Patagonian sprat Sprattus fuegensis (Jenyns, 1842) in Chiloé inland sea, southern ChileCerna,FranciscoLeal,ElsonLópez,AmaliaPlaza,Guido Sprattus fuegensis otolith growth mortality distribution Chiloé inland sea southern Chile Growth parameters (L∞, K, and t0) and natural mortality of the Patagonian sprat (Sprattus fuegensis) Chiloé inland sea were estimated. This area corresponds to the northern limit of the species distribution in the South Pacific Ocean. A total of 1,584 otolith were analyzed between July 2005 and December 2006. A covariance analysis ruled out significant differences (P = 0.654) in the otolith size-fish length relationship between males and females. The otoliths showed high monthly proportion of hyaline edge type in August 2005 and from July to October 2006. The hyaline band formation from mid-winter to spring coincided with the breeding season extending from September to December. This suggests an annual periodicity of annuli formation, likely as a consequence of channeling energy into reproduction. The growth parameters were L∞= 17.71 cm; K = 0.78 yr-1; and t0 = -0.46 yr, while the maximum observed age was 6 years. Natural mortality given growth parameters and species maturity, was estimated at 1.0 yr-1. The modal decomposition of monthly length distribution, analyzed by a statistical-numerical algorithm (MIX approach) gave similar results to those obtained from otolith readings.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.42 n.3 20142014-07-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000300015en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Sprattus fuegensis otolith growth mortality distribution Chiloé inland sea southern Chile
spellingShingle	Sprattus fuegensis otolith growth mortality distribution Chiloé inland sea southern Chile Cerna,Francisco Leal,Elson López,Amalia Plaza,Guido Age, growth and natural mortality of the Patagonian sprat Sprattus fuegensis (Jenyns, 1842) in Chiloé inland sea, southern Chile
description	Growth parameters (L∞, K, and t0) and natural mortality of the Patagonian sprat (Sprattus fuegensis) Chiloé inland sea were estimated. This area corresponds to the northern limit of the species distribution in the South Pacific Ocean. A total of 1,584 otolith were analyzed between July 2005 and December 2006. A covariance analysis ruled out significant differences (P = 0.654) in the otolith size-fish length relationship between males and females. The otoliths showed high monthly proportion of hyaline edge type in August 2005 and from July to October 2006. The hyaline band formation from mid-winter to spring coincided with the breeding season extending from September to December. This suggests an annual periodicity of annuli formation, likely as a consequence of channeling energy into reproduction. The growth parameters were L∞= 17.71 cm; K = 0.78 yr-1; and t0 = -0.46 yr, while the maximum observed age was 6 years. Natural mortality given growth parameters and species maturity, was estimated at 1.0 yr-1. The modal decomposition of monthly length distribution, analyzed by a statistical-numerical algorithm (MIX approach) gave similar results to those obtained from otolith readings.
author	Cerna,Francisco Leal,Elson López,Amalia Plaza,Guido
author_facet	Cerna,Francisco Leal,Elson López,Amalia Plaza,Guido
author_sort	Cerna,Francisco
title	Age, growth and natural mortality of the Patagonian sprat Sprattus fuegensis (Jenyns, 1842) in Chiloé inland sea, southern Chile
title_short	Age, growth and natural mortality of the Patagonian sprat Sprattus fuegensis (Jenyns, 1842) in Chiloé inland sea, southern Chile
title_full	Age, growth and natural mortality of the Patagonian sprat Sprattus fuegensis (Jenyns, 1842) in Chiloé inland sea, southern Chile
title_fullStr	Age, growth and natural mortality of the Patagonian sprat Sprattus fuegensis (Jenyns, 1842) in Chiloé inland sea, southern Chile
title_full_unstemmed	Age, growth and natural mortality of the Patagonian sprat Sprattus fuegensis (Jenyns, 1842) in Chiloé inland sea, southern Chile
title_sort	age, growth and natural mortality of the patagonian sprat sprattus fuegensis (jenyns, 1842) in chiloé inland sea, southern chile
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000300015
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Age, growth and natural mortality of the Patagonian sprat Sprattus fuegensis (Jenyns, 1842) in Chiloé inland sea, southern Chile

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