Employment of morphometric variables to assess nutritional condition of Argentine anchovy larvae Engraulis anchoita Hubbs & Marini, 1935

Most important causes of larval mortality are predation and starvation. The latter can be assessed by the measurement of the nutritional condition. The objective of the present study was to evaluate the nutritional condition of E. anchoita larvae employing morphometric techniques in three different...

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Autores principales:	Diaz,Marina V, Pájaro,Marcelo, Sánchez,Ramiro P
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2009
Materias:	Engraulidae southwest Atlantic Ocean morphometrics Principal Component Analysis
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572009000300002
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spelling	oai:scielo:S0718-195720090003000022010-03-31Employment of morphometric variables to assess nutritional condition of Argentine anchovy larvae Engraulis anchoita Hubbs & Marini, 1935Diaz,Marina VPájaro,MarceloSánchez,Ramiro P Engraulidae southwest Atlantic Ocean morphometrics Principal Component Analysis Most important causes of larval mortality are predation and starvation. The latter can be assessed by the measurement of the nutritional condition. The objective of the present study was to evaluate the nutritional condition of E. anchoita larvae employing morphometric techniques in three different hydrographic areas of the Argentine sea in order to establish regional and interpopulation variability: El Rincón coastal area, Outer-shelf and Península Valdés tidal front. Sampled larvae from El Rincón coastal area showed a higher growth rate (growth curve slope = 3.575) but had lower weight, and thus low Fulton (15.71 ± 3.58, n = 41) and Le Cren (0.63 ± 0.13, n = 41) condition indices, in comparison to specimens from the other two areas (P < 0.001). The Principal Component Analysis, employing morphometrical variables and weight, separated larvae from El Rincón from larvae captured in the other areas. These results could be explained as a consequence of an increase in density dependent mortality or food competition in El Rincón due to a year with an exceptional high larvae production. Our results showed that the use of morphometrical variables and weight allow to find differences in growth rate and nutritional condition among anchovy larvae collected in areas characterized by dissimilar oceanographic scenarios.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.44 n.3 20092009-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572009000300002en10.4067/S0718-19572009000300002
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Engraulidae southwest Atlantic Ocean morphometrics Principal Component Analysis
spellingShingle	Engraulidae southwest Atlantic Ocean morphometrics Principal Component Analysis Diaz,Marina V Pájaro,Marcelo Sánchez,Ramiro P Employment of morphometric variables to assess nutritional condition of Argentine anchovy larvae Engraulis anchoita Hubbs & Marini, 1935
description	Most important causes of larval mortality are predation and starvation. The latter can be assessed by the measurement of the nutritional condition. The objective of the present study was to evaluate the nutritional condition of E. anchoita larvae employing morphometric techniques in three different hydrographic areas of the Argentine sea in order to establish regional and interpopulation variability: El Rincón coastal area, Outer-shelf and Península Valdés tidal front. Sampled larvae from El Rincón coastal area showed a higher growth rate (growth curve slope = 3.575) but had lower weight, and thus low Fulton (15.71 ± 3.58, n = 41) and Le Cren (0.63 ± 0.13, n = 41) condition indices, in comparison to specimens from the other two areas (P < 0.001). The Principal Component Analysis, employing morphometrical variables and weight, separated larvae from El Rincón from larvae captured in the other areas. These results could be explained as a consequence of an increase in density dependent mortality or food competition in El Rincón due to a year with an exceptional high larvae production. Our results showed that the use of morphometrical variables and weight allow to find differences in growth rate and nutritional condition among anchovy larvae collected in areas characterized by dissimilar oceanographic scenarios.
author	Diaz,Marina V Pájaro,Marcelo Sánchez,Ramiro P
author_facet	Diaz,Marina V Pájaro,Marcelo Sánchez,Ramiro P
author_sort	Diaz,Marina V
title	Employment of morphometric variables to assess nutritional condition of Argentine anchovy larvae Engraulis anchoita Hubbs & Marini, 1935
title_short	Employment of morphometric variables to assess nutritional condition of Argentine anchovy larvae Engraulis anchoita Hubbs & Marini, 1935
title_full	Employment of morphometric variables to assess nutritional condition of Argentine anchovy larvae Engraulis anchoita Hubbs & Marini, 1935
title_fullStr	Employment of morphometric variables to assess nutritional condition of Argentine anchovy larvae Engraulis anchoita Hubbs & Marini, 1935
title_full_unstemmed	Employment of morphometric variables to assess nutritional condition of Argentine anchovy larvae Engraulis anchoita Hubbs & Marini, 1935
title_sort	employment of morphometric variables to assess nutritional condition of argentine anchovy larvae engraulis anchoita hubbs & marini, 1935
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2009
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572009000300002
work_keys_str_mv	AT diazmarinav employmentofmorphometricvariablestoassessnutritionalconditionofargentineanchovylarvaeengraulisanchoitahubbsampmarini1935 AT pajaromarcelo employmentofmorphometricvariablestoassessnutritionalconditionofargentineanchovylarvaeengraulisanchoitahubbsampmarini1935 AT sanchezramirop employmentofmorphometricvariablestoassessnutritionalconditionofargentineanchovylarvaeengraulisanchoitahubbsampmarini1935
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Employment of morphometric variables to assess nutritional condition of Argentine anchovy larvae Engraulis anchoita Hubbs &amp; Marini, 1935

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Employment of morphometric variables to assess nutritional condition of Argentine anchovy larvae Engraulis anchoita Hubbs & Marini, 1935