Age and growth changes and population dynamics of the black pomfret (Parastromateus niger) and the frigate tuna (Auxis thazard thazard), in the Taiwan Strait

The age and growth and population dynamics of the black pomfret, Parastromateus niger and the frigate tuna, Auxis thazard thazard were studied from specimens collected monthly in the Taiwan Strait from April 2005 to March 2006. With five age groups of each, the dominant black pomfret was one year, w...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Tao,Yu, Mingru,Chen, Jianguo,Du, Zhenbin,Lu, Shengyun,Yang
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2012
Materias:	Parastromateus niger Auxis thazard thazard age growth population dynamics management Taiwan Strait China
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2012000300013
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0718-560X2012000300013
record_format	dspace
spelling	oai:scielo:S0718-560X20120003000132013-01-03Age and growth changes and population dynamics of the black pomfret (Parastromateus niger) and the frigate tuna (Auxis thazard thazard), in the Taiwan StraitTao,YuMingru,ChenJianguo,DuZhenbin,LuShengyun,Yang Parastromateus niger Auxis thazard thazard age growth population dynamics management Taiwan Strait China The age and growth and population dynamics of the black pomfret, Parastromateus niger and the frigate tuna, Auxis thazard thazard were studied from specimens collected monthly in the Taiwan Strait from April 2005 to March 2006. With five age groups of each, the dominant black pomfret was one year, while frigate tuna was two years. The total mortality coefficient (Z) and the fishing mortality (F) of the black pomfret were at high levels, the exploitation ratio (E) was over 0.5, and the number of captured juvenile fishes showed that the stock of black pomfret in this area was overexploited and improper fishing gear was utilized. Compared with previous studies, the maximum and mean fork length, body weight and age of the two fishes declined gradually, the populations were younger in age and smaller in size. The growth coefficient k increased and age at the inflexion point of weight t r was younger than before. The smaller change of the fork length at first maturity of the two fishes has indicated a more vulnerable fishery ecosystem in this area. Therefore, in addition to the traditional fishery management approach, such as taking the minimum length into consideration, ecosystem approach to fisheries management (EAF) should be taken to improve the practical fishing management, including conserving the small pelagic fishery population in order to achieve the sustainable fishing of the stocks.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.40 n.SpecIssue 20122012-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2012000300013en103856/vol40-issue3-fulltext-13
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Parastromateus niger Auxis thazard thazard age growth population dynamics management Taiwan Strait China
spellingShingle	Parastromateus niger Auxis thazard thazard age growth population dynamics management Taiwan Strait China Tao,Yu Mingru,Chen Jianguo,Du Zhenbin,Lu Shengyun,Yang Age and growth changes and population dynamics of the black pomfret (Parastromateus niger) and the frigate tuna (Auxis thazard thazard), in the Taiwan Strait
description	The age and growth and population dynamics of the black pomfret, Parastromateus niger and the frigate tuna, Auxis thazard thazard were studied from specimens collected monthly in the Taiwan Strait from April 2005 to March 2006. With five age groups of each, the dominant black pomfret was one year, while frigate tuna was two years. The total mortality coefficient (Z) and the fishing mortality (F) of the black pomfret were at high levels, the exploitation ratio (E) was over 0.5, and the number of captured juvenile fishes showed that the stock of black pomfret in this area was overexploited and improper fishing gear was utilized. Compared with previous studies, the maximum and mean fork length, body weight and age of the two fishes declined gradually, the populations were younger in age and smaller in size. The growth coefficient k increased and age at the inflexion point of weight t r was younger than before. The smaller change of the fork length at first maturity of the two fishes has indicated a more vulnerable fishery ecosystem in this area. Therefore, in addition to the traditional fishery management approach, such as taking the minimum length into consideration, ecosystem approach to fisheries management (EAF) should be taken to improve the practical fishing management, including conserving the small pelagic fishery population in order to achieve the sustainable fishing of the stocks.
author	Tao,Yu Mingru,Chen Jianguo,Du Zhenbin,Lu Shengyun,Yang
author_facet	Tao,Yu Mingru,Chen Jianguo,Du Zhenbin,Lu Shengyun,Yang
author_sort	Tao,Yu
title	Age and growth changes and population dynamics of the black pomfret (Parastromateus niger) and the frigate tuna (Auxis thazard thazard), in the Taiwan Strait
title_short	Age and growth changes and population dynamics of the black pomfret (Parastromateus niger) and the frigate tuna (Auxis thazard thazard), in the Taiwan Strait
title_full	Age and growth changes and population dynamics of the black pomfret (Parastromateus niger) and the frigate tuna (Auxis thazard thazard), in the Taiwan Strait
title_fullStr	Age and growth changes and population dynamics of the black pomfret (Parastromateus niger) and the frigate tuna (Auxis thazard thazard), in the Taiwan Strait
title_full_unstemmed	Age and growth changes and population dynamics of the black pomfret (Parastromateus niger) and the frigate tuna (Auxis thazard thazard), in the Taiwan Strait
title_sort	age and growth changes and population dynamics of the black pomfret (parastromateus niger) and the frigate tuna (auxis thazard thazard), in the taiwan strait
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2012000300013
work_keys_str_mv	AT taoyu ageandgrowthchangesandpopulationdynamicsoftheblackpomfretparastromateusnigerandthefrigatetunaauxisthazardthazardinthetaiwanstrait AT mingruchen ageandgrowthchangesandpopulationdynamicsoftheblackpomfretparastromateusnigerandthefrigatetunaauxisthazardthazardinthetaiwanstrait AT jianguodu ageandgrowthchangesandpopulationdynamicsoftheblackpomfretparastromateusnigerandthefrigatetunaauxisthazardthazardinthetaiwanstrait AT zhenbinlu ageandgrowthchangesandpopulationdynamicsoftheblackpomfretparastromateusnigerandthefrigatetunaauxisthazardthazardinthetaiwanstrait AT shengyunyang ageandgrowthchangesandpopulationdynamicsoftheblackpomfretparastromateusnigerandthefrigatetunaauxisthazardthazardinthetaiwanstrait
_version_	1714205096144797696

Age and growth changes and population dynamics of the black pomfret (Parastromateus niger) and the frigate tuna (Auxis thazard thazard), in the Taiwan Strait

Ejemplares similares