Latitudinal comparisons of reproductive traits in five Brachyuran species along the Chilean coast

Understanding large-scale patterns in reproductive investment and fecundity of marine invertebrates is important for determining the critical environmental variables affecting reproduction and thus, the spatial patterns of population dynamics. However, information on patterns of reproduction of mari...

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Autores principales:	BRANTE,ANTONIO, CIFUENTES,SANDRA, PÖRTNER,HANS-OTTO, ARNTZ,WOLF, FERNÁNDEZ,MIRIAM
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2004
Materias:	reproductive investment fecundity brooding crabs embryo loss
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2004000100003
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spelling	oai:scielo:S0716-078X20040001000032004-06-11Latitudinal comparisons of reproductive traits in five Brachyuran species along the Chilean coastBRANTE,ANTONIOCIFUENTES,SANDRAPÖRTNER,HANS-OTTOARNTZ,WOLFFERNÁNDEZ,MIRIAM reproductive investment fecundity brooding crabs embryo loss Understanding large-scale patterns in reproductive investment and fecundity of marine invertebrates is important for determining the critical environmental variables affecting reproduction and thus, the spatial patterns of population dynamics. However, information on patterns of reproduction of marine invertebrates at large spatial scales are either scarce, or have been conducted by mixing species with contrasting modes of development. Brachyuran crabs are an ideal group to analyze large-scale patterns of reproduction not only because many species are commercially exploited, but also because they show a single mode of larval development and wide distributional ranges. Here, we report latitudinal patterns of reproductive variables in five Brachyuran crab species along the coast of Chile (18-54 ° S): Cancer setosus, Paraxanthus barbiger, Homalaspis plana, Ovalipes trimaculatus, and Taliepus marginatus. Five variables were analyzed: brood weight, fecundity, embryo dry weight, embryo volume, and embryo loss. Comparisons between northern (20 °S), central (29-33 °S) and southern Chile (35-41 ° S) were conducted for C. setosus and between central and southern Chile for the other four species. A total of 378 brooding females were collected and analyzed. Although we did not find a clear and consistent pattern in all reproductive variables in the five crab species analyzed along the coast of Chile, generalizations can be drawn from this study. First, brood weight did not vary between central and southern Chile in most of the species (except P. barbiger). Second, embryo loss did not vary between central and southern Chile in four of the species studied. Third, embryo dry weight tended to increase toward high latitudes in four of the five species. We suggest that the costs associated to oxygen provision to broods may explain some of the patterns found, but other factors need also be consideredinfo:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.77 n.1 20042004-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2004000100003en10.4067/S0716-078X2004000100003
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	reproductive investment fecundity brooding crabs embryo loss
spellingShingle	reproductive investment fecundity brooding crabs embryo loss BRANTE,ANTONIO CIFUENTES,SANDRA PÖRTNER,HANS-OTTO ARNTZ,WOLF FERNÁNDEZ,MIRIAM Latitudinal comparisons of reproductive traits in five Brachyuran species along the Chilean coast
description	Understanding large-scale patterns in reproductive investment and fecundity of marine invertebrates is important for determining the critical environmental variables affecting reproduction and thus, the spatial patterns of population dynamics. However, information on patterns of reproduction of marine invertebrates at large spatial scales are either scarce, or have been conducted by mixing species with contrasting modes of development. Brachyuran crabs are an ideal group to analyze large-scale patterns of reproduction not only because many species are commercially exploited, but also because they show a single mode of larval development and wide distributional ranges. Here, we report latitudinal patterns of reproductive variables in five Brachyuran crab species along the coast of Chile (18-54 ° S): Cancer setosus, Paraxanthus barbiger, Homalaspis plana, Ovalipes trimaculatus, and Taliepus marginatus. Five variables were analyzed: brood weight, fecundity, embryo dry weight, embryo volume, and embryo loss. Comparisons between northern (20 °S), central (29-33 °S) and southern Chile (35-41 ° S) were conducted for C. setosus and between central and southern Chile for the other four species. A total of 378 brooding females were collected and analyzed. Although we did not find a clear and consistent pattern in all reproductive variables in the five crab species analyzed along the coast of Chile, generalizations can be drawn from this study. First, brood weight did not vary between central and southern Chile in most of the species (except P. barbiger). Second, embryo loss did not vary between central and southern Chile in four of the species studied. Third, embryo dry weight tended to increase toward high latitudes in four of the five species. We suggest that the costs associated to oxygen provision to broods may explain some of the patterns found, but other factors need also be considered
author	BRANTE,ANTONIO CIFUENTES,SANDRA PÖRTNER,HANS-OTTO ARNTZ,WOLF FERNÁNDEZ,MIRIAM
author_facet	BRANTE,ANTONIO CIFUENTES,SANDRA PÖRTNER,HANS-OTTO ARNTZ,WOLF FERNÁNDEZ,MIRIAM
author_sort	BRANTE,ANTONIO
title	Latitudinal comparisons of reproductive traits in five Brachyuran species along the Chilean coast
title_short	Latitudinal comparisons of reproductive traits in five Brachyuran species along the Chilean coast
title_full	Latitudinal comparisons of reproductive traits in five Brachyuran species along the Chilean coast
title_fullStr	Latitudinal comparisons of reproductive traits in five Brachyuran species along the Chilean coast
title_full_unstemmed	Latitudinal comparisons of reproductive traits in five Brachyuran species along the Chilean coast
title_sort	latitudinal comparisons of reproductive traits in five brachyuran species along the chilean coast
publisher	Sociedad de Biología de Chile
publishDate	2004
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2004000100003
work_keys_str_mv	AT branteantonio latitudinalcomparisonsofreproductivetraitsinfivebrachyuranspeciesalongthechileancoast AT cifuentessandra latitudinalcomparisonsofreproductivetraitsinfivebrachyuranspeciesalongthechileancoast AT portnerhansotto latitudinalcomparisonsofreproductivetraitsinfivebrachyuranspeciesalongthechileancoast AT arntzwolf latitudinalcomparisonsofreproductivetraitsinfivebrachyuranspeciesalongthechileancoast AT fernandezmiriam latitudinalcomparisonsofreproductivetraitsinfivebrachyuranspeciesalongthechileancoast
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Latitudinal comparisons of reproductive traits in five Brachyuran species along the Chilean coast

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