Age and growth of thread herring Opisthonema libertate, in the southern Gulf of California

ABSTRACT To fit a growth model to Opisthonema libertate, the most common thread herring in a small pelagic fishery in the southern Gulf of California, size data of commercial landings and age were generated from sagittal otoliths assessed during three different years, 2005, 2008 and 2015, representi...

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Autores principales:	Payan-Alejo,Jorge, Jacob-Cervantes,Mercedes L., Rodríguez-Domínguez,Guillermo
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2020
Materias:	Opisthonema liberate growth compensatory effect multi-model selection Gulf of California
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2020000100015
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spelling	oai:scielo:S0718-560X20200001000152020-05-25Age and growth of thread herring Opisthonema libertate, in the southern Gulf of CaliforniaPayan-Alejo,JorgeJacob-Cervantes,Mercedes L.Rodríguez-Domínguez,Guillermo Opisthonema liberate growth compensatory effect multi-model selection Gulf of California ABSTRACT To fit a growth model to Opisthonema libertate, the most common thread herring in a small pelagic fishery in the southern Gulf of California, size data of commercial landings and age were generated from sagittal otoliths assessed during three different years, 2005, 2008 and 2015, representing Neutral, La Niña and El Niño environmental conditions, respectively. A multimodel select approach on five special submodels of generalized Schnute model, including one, equivalent to the Von Bertalanffy model, were used. A total of 573 otoliths were analyzed; 219 from Neutral, 149 from El Niño and 205 from The Niña events. An opaque zone of otoliths formed in winter-spring when chlorophyll a (Chl-a) concentrations were at a maximum. However, a hyaline zone of otoliths formed during the summer of the reproductive period. Schnute submodel 1 was the best model selected in all three environmental conditions, but submodel 3 was the best on pooled data. Length of thread herring aged 0.5 years old in the El Niño year was lower than other environmental-years analyzed. A possible compensatory effect on growth with age was observed in the data because environmental conditions affected the growth of 0.5-year-old thread herring, as was evident in size variance in this age group under all three conditions, but variance decreased in the older age groups. Thus, a multimodel average of Schnute submodels 1 and 3 could be used to describe the growth of O. libertate in the southern Gulf of California.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.48 n.1 20202020-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2020000100015en10.3856/vol48-issue1-fulltext-2308
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Opisthonema liberate growth compensatory effect multi-model selection Gulf of California
spellingShingle	Opisthonema liberate growth compensatory effect multi-model selection Gulf of California Payan-Alejo,Jorge Jacob-Cervantes,Mercedes L. Rodríguez-Domínguez,Guillermo Age and growth of thread herring Opisthonema libertate, in the southern Gulf of California
description	ABSTRACT To fit a growth model to Opisthonema libertate, the most common thread herring in a small pelagic fishery in the southern Gulf of California, size data of commercial landings and age were generated from sagittal otoliths assessed during three different years, 2005, 2008 and 2015, representing Neutral, La Niña and El Niño environmental conditions, respectively. A multimodel select approach on five special submodels of generalized Schnute model, including one, equivalent to the Von Bertalanffy model, were used. A total of 573 otoliths were analyzed; 219 from Neutral, 149 from El Niño and 205 from The Niña events. An opaque zone of otoliths formed in winter-spring when chlorophyll a (Chl-a) concentrations were at a maximum. However, a hyaline zone of otoliths formed during the summer of the reproductive period. Schnute submodel 1 was the best model selected in all three environmental conditions, but submodel 3 was the best on pooled data. Length of thread herring aged 0.5 years old in the El Niño year was lower than other environmental-years analyzed. A possible compensatory effect on growth with age was observed in the data because environmental conditions affected the growth of 0.5-year-old thread herring, as was evident in size variance in this age group under all three conditions, but variance decreased in the older age groups. Thus, a multimodel average of Schnute submodels 1 and 3 could be used to describe the growth of O. libertate in the southern Gulf of California.
author	Payan-Alejo,Jorge Jacob-Cervantes,Mercedes L. Rodríguez-Domínguez,Guillermo
author_facet	Payan-Alejo,Jorge Jacob-Cervantes,Mercedes L. Rodríguez-Domínguez,Guillermo
author_sort	Payan-Alejo,Jorge
title	Age and growth of thread herring Opisthonema libertate, in the southern Gulf of California
title_short	Age and growth of thread herring Opisthonema libertate, in the southern Gulf of California
title_full	Age and growth of thread herring Opisthonema libertate, in the southern Gulf of California
title_fullStr	Age and growth of thread herring Opisthonema libertate, in the southern Gulf of California
title_full_unstemmed	Age and growth of thread herring Opisthonema libertate, in the southern Gulf of California
title_sort	age and growth of thread herring opisthonema libertate, in the southern gulf of california
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2020
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2020000100015
work_keys_str_mv	AT payanalejojorge ageandgrowthofthreadherringopisthonemalibertateinthesoutherngulfofcalifornia AT jacobcervantesmercedesl ageandgrowthofthreadherringopisthonemalibertateinthesoutherngulfofcalifornia AT rodriguezdominguezguillermo ageandgrowthofthreadherringopisthonemalibertateinthesoutherngulfofcalifornia
_version_	1714205229982941184

Age and growth of thread herring Opisthonema libertate, in the southern Gulf of California

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