Effects of hatching age on development and hatchling morphology in the red-eyed tree frog, Agalychnis callidryas
نویسندگان
چکیده
منابع مشابه
Hatching timing, oxygen availability, and external gill regression in the tree frog, Agalychnis callidryas.
The physiological role of the embryonic external gills in anurans is equivocal. In some species, diffusion alone is clearly sufficient to supply oxygen throughout the embryonic period. In others, morphological elaboration and environmental regulation of the external gills suggest functional importance. Since oxygen stress is a common trigger of hatching, I examined the relationships among hatch...
متن کاملEgg clutch dehydration induces early hatching in red-eyed treefrogs, Agalychnis callidryas
Terrestrial eggs have evolved repeatedly in tropical anurans exposing embryos to the new threat of dehydration. Red-eyed treefrogs, Agalychnis callidryas, lay eggs on plants over water. Maternally provided water allows shaded eggs in humid sites to develop to hatching without rainfall, but unshaded eggs and those in less humid sites can die from dehydration. Hatching responses of amphibian eggs...
متن کاملEffects of different UV and calcium provisioning on health and fitness traits of red-eyed tree frogs (Agalychnis callidryas)
Article history: Received: 7 March 2014 Accepted: 17 July 2014 Published online: 31 July 2014 Abstract In response to global amphibian declines and extinctions, the IUCN has recommended the establishment of ex situ conservation breeding programmes. However, there are a limited number of studies that scientifically assess amphibian husbandry practices, even at a basic level of nutrition and ligh...
متن کاملTemporal pattern cues in vibrational risk assessment by embryos of the red-eyed treefrog, Agalychnis callidryas.
The embryos of red-eyed treefrogs, Agalychnis callidryas, use vibrations transmitted through their arboreal egg clutch to cue escape hatching behavior when attacked by egg-eating snakes. Hatching early increases the risk of predation in the water, so embryos should avoid it unless they are in danger. We exposed egg clutches to intermittent vibrations with different combinations of vibration dur...
متن کاملImpact of Plant Cover on Fitness and Behavioural Traits of Captive Red-Eyed Tree Frogs (Agalychnis callidryas)
Despite the importance of ex situ conservation programmes as highlighted in the Amphibian Conservation Action Plan, there are few empirical studies that examine the influence of captive conditions on the fitness of amphibians, even for basic components of enclosure design such as cover provision. Maintaining the fitness of captive amphibian populations is essential to the success of ex situ con...
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ژورنال
عنوان ژورنال: Biological Journal of the Linnean Society
سال: 1999
ISSN: 0024-4066
DOI: 10.1111/j.1095-8312.1999.tb01180.x