Water balance of terrestrial anuran (Eleutherodactylus Coqui) eggs: importance of parental care

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dc.contributor.author Taigen, Theodore en_US
dc.contributor.author Pough, F. Harvey en_US
dc.contributor.author Stewart, Margaret en_US
dc.date.accessioned 2006-08-28T14:38:16Z en_US
dc.date.available 2006-08-28T14:38:16Z en_US
dc.date.issued 1984-02 en_US
dc.identifier.citation Ecology 65N1 (1984) 248-255 en_US
dc.identifier.issn 0012-9658 en_US
dc.identifier.uri http://hdl.handle.net/1850/2495 en_US
dc.description.abstract The terrestrial eggs of the coqui of Puerto Rico are brooded almost continuously by the male parent from the time of oviposition until the fully metamorphosed hatchlings emerge from the eggs 15-20 d later. The gelatinous layer surrounding each egg offers no resistance to the exchange of water by the egg, and rates of exchange are determined by microclimatic conditions, structural characteristics of the nest, and the behavior of the male frog . During development in natural nests, the eggs experience a three- to fourfold increase in mass. Laboratory experiments coupled with field observations indicate that this increase is the result of the transfer of liquid water from the incubating male to his eggs. The transfer is driven by a difference in water potential between the eggs and the body fluids of the male frog that is nearly constant throughout incubation, despite an increase in egg mass. Eggs must take up water during incubation. Eggs that do not experience an increase in mass during development either die or produce small hatchlings. A water uptake that doubles the initial mass of the egg is necessary to produce a full-size hatchling with normal tissue water content. en_US
dc.description.sponsorship Our research has been supported by National Science Foundation Grant DEB-7721349 to F. H. Pough and M. M. Stewart. en_US
dc.format.extent 37555 bytes en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en_US en_US
dc.publisher The Ecological Society of America: Ecology en_US
dc.subject Brooding en_US
dc.subject Eggs en_US
dc.subject Frogs en_US
dc.subject Water balance en_US
dc.title Water balance of terrestrial anuran (Eleutherodactylus Coqui) eggs: importance of parental care en_US
dc.type Article en_US
dc.identifier.url http://dx.doi.org/10.2307/1939477

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