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Brood care in Brachyuran crabs: the effect of oxygen provision on reproductive costs RChHN
FERNÁNDEZ,MIRIAM; BRANTE,ANTONIO.
The quantification of the costs associated with parental care of marine invertebrates requires a first and necessary step, which is the identification of the different forms of care exhibited by this group. Among marine invertebrates, provision of oxygen to the aggregation of embryos may be critical, although most evidence on the link between oxygen limitation and parental care is indirect. Species which show active behavior directed at providing oxygen to the brood offer a good model to establish the direct link between behavioural patterns and oxygen provision to the embryos, and to estimate the costs associated with this form of care. In this manuscript, we conducted a review of the current knowledge about oxygen limitation in embryos aggregations of...
Tipo: Journal article Palavras-chave: Reproduction; Brood care; Crabs; Oxygen; Marine invertebrates.
Ano: 2003 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000200003
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Free-living benthic marine invertebrates in Chile RChHN
LEE,MATTHEW R; CASTILLA,JUAN CARLOS; FERNÁNDEZ,MIRIAM; CLARKE,MARCELA; GONZÁLEZ,CATHERINE; HERMOSILLA,CONSUELO; PRADO,LUIS; ROZBACZYLO,NICOLAS; VALDOVINOS,CLAUDIO.
A comprehensive literature review was conducted to determine the species richness of all the possible taxa of free-living benthic marine invertebrates in Chile. In addition, the extent of endemism to the Pacific Islands and deep-sea, the number of non-indigenous species, and the contribution that the Chilean benthic marine invertebrate fauna makes to the world benthic marine invertebrate fauna was examined. A total of 4,553 species were found. The most speciose taxa were the Crustacea, Mollusca and Polychaeta. Species richness data was not available for a number of taxa, despite evidence that these taxa are present in the Chilean benthos. The Chilean marine invertebrate benthic fauna constitutes 2.47 % of the world marine invertebrate benthic fauna. There...
Tipo: Journal article Palavras-chave: Chile; Species richness; Benthos; Free-living invertebrates.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2008000100005
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Latitudinal comparisons of reproductive traits in five Brachyuran species along the Chilean coast RChHN
BRANTE,ANTONIO; CIFUENTES,SANDRA; PÖRTNER,HANS-OTTO; ARNTZ,WOLF; FERNÁNDEZ,MIRIAM.
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...
Tipo: Journal article Palavras-chave: Reproductive investment; Fecundity; Brooding; Crabs; Embryo loss.
Ano: 2004 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2004000100003
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The effects of temperature and oxygen availability on intracapsular development of Acanthina monodon (Gastropoda: Muricidae) RChHN
FERNÁNDEZ,MIRIAM; PAPPALARDO,PAULA; JENO,KATHERINE.
Freshwater and marine organisms show similar models of parental care and are faced with similar constraints to brood, which suggest that comparable environmental limits drive the evolution of parental care in aquatic systems. In fact, the low diffusion coefficient and solubility of oxygen in aquatic environments affect oxygen acquisition and therefore the capacity to aggregate embryos. The effect of other critical environmental variables, such as temperature, is less clear. We assessed the effects of temperature and oxygen availability on (1) the number of developed and undeveloped encapsulated embryos, (2) the proportion of embryos reaching advanced stages during intracapsular development (counting not only developed and undeveloped embryos but also...
Tipo: Journal article Palavras-chave: Brooding; Intracapsular development; Gastropods; Oxygen; Temperature.
Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2006000200002
Registros recuperados: 4
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