Latitudinal variation in local productivity influences body condition of South American sea lion pups

In otariids, the condition and growth of offspring are linked to prey availability because females show a strong dependence on local food availability. Thus, it is expected that body condition of sea lion pups will vary spatially and/or temporally as a response to variations in the abundance of prey...

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Autores principales:	M Sepúlveda, D Olea, P Carrasco, M Santos-Carvallo, J Castillo, RA Quiñones
Formato:	article
Lenguaje:	EN
Publicado:	Inter-Research 2014
Materias:	Biology (General) QH301-705.5 Microbiology QR1-502
Acceso en línea:	https://doaj.org/article/173d2955240e4ceebb3217b0e27d1010
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spelling	oai:doaj.org-article:173d2955240e4ceebb3217b0e27d10102021-11-18T09:19:57ZLatitudinal variation in local productivity influences body condition of South American sea lion pups1864-77821864-779010.3354/ab00604https://doaj.org/article/173d2955240e4ceebb3217b0e27d10102014-12-01T00:00:00Zhttps://www.int-res.com/abstracts/ab/v23/n1/p39-47/https://doaj.org/toc/1864-7782https://doaj.org/toc/1864-7790In otariids, the condition and growth of offspring are linked to prey availability because females show a strong dependence on local food availability. Thus, it is expected that body condition of sea lion pups will vary spatially and/or temporally as a response to variations in the abundance of prey species on which females feed. The objective of this study was to analyze the geographic and temporal variation in the body condition of South American sea lion Otaria flavescens pups in Chile, and to relate it to spatio-temporal variations in prey availability. We captured 340 live pups in 2 distant colonies, Punta Patache/Punta Negra and Cobquecura, along the Chilean coast during consecutive breeding seasons. A morphometric index of pup body condition was estimated by comparing pups in all years using least-squares linear regression of the log10‑transformed measurements of standard length vs. body mass. We analyzed the relationship between this index and estimates of fish biomass (as a proxy of prey availability) at each locality. We found that body condition was significantly different between years and between colonies, suggesting that animals of the central-south area were in better condition than those in the north. A positive relationship between body condition and fish biomass was found, suggesting that differences in body condition may be explained by spatial and temporal differences in prey availability.M SepúlvedaD OleaP CarrascoM Santos-CarvalloJ CastilloRA QuiñonesInter-ResearcharticleBiology (General)QH301-705.5MicrobiologyQR1-502ENAquatic Biology, Vol 23, Iss 1, Pp 39-47 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Biology (General) QH301-705.5 Microbiology QR1-502
spellingShingle	Biology (General) QH301-705.5 Microbiology QR1-502 M Sepúlveda D Olea P Carrasco M Santos-Carvallo J Castillo RA Quiñones Latitudinal variation in local productivity influences body condition of South American sea lion pups
description	In otariids, the condition and growth of offspring are linked to prey availability because females show a strong dependence on local food availability. Thus, it is expected that body condition of sea lion pups will vary spatially and/or temporally as a response to variations in the abundance of prey species on which females feed. The objective of this study was to analyze the geographic and temporal variation in the body condition of South American sea lion Otaria flavescens pups in Chile, and to relate it to spatio-temporal variations in prey availability. We captured 340 live pups in 2 distant colonies, Punta Patache/Punta Negra and Cobquecura, along the Chilean coast during consecutive breeding seasons. A morphometric index of pup body condition was estimated by comparing pups in all years using least-squares linear regression of the log10‑transformed measurements of standard length vs. body mass. We analyzed the relationship between this index and estimates of fish biomass (as a proxy of prey availability) at each locality. We found that body condition was significantly different between years and between colonies, suggesting that animals of the central-south area were in better condition than those in the north. A positive relationship between body condition and fish biomass was found, suggesting that differences in body condition may be explained by spatial and temporal differences in prey availability.
format	article
author	M Sepúlveda D Olea P Carrasco M Santos-Carvallo J Castillo RA Quiñones
author_facet	M Sepúlveda D Olea P Carrasco M Santos-Carvallo J Castillo RA Quiñones
author_sort	M Sepúlveda
title	Latitudinal variation in local productivity influences body condition of South American sea lion pups
title_short	Latitudinal variation in local productivity influences body condition of South American sea lion pups
title_full	Latitudinal variation in local productivity influences body condition of South American sea lion pups
title_fullStr	Latitudinal variation in local productivity influences body condition of South American sea lion pups
title_full_unstemmed	Latitudinal variation in local productivity influences body condition of South American sea lion pups
title_sort	latitudinal variation in local productivity influences body condition of south american sea lion pups
publisher	Inter-Research
publishDate	2014
url	https://doaj.org/article/173d2955240e4ceebb3217b0e27d1010
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Latitudinal variation in local productivity influences body condition of South American sea lion pups

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