Developmental Changes in Cardiac and Metabolic Physiology of the Direct-Developing Tropical Frog Eleutherodactylus Coqui
نویسندگان
چکیده
منابع مشابه
Susceptibility to the amphibian chytrid fungus varies with ontogeny in the direct-developing frog, Eleutherodactylus coqui.
Age-related differences in susceptibility to infectious disease are known from a wide variety of plant and animal taxonomic groups. For example, the immature immune systems of young vertebrates, along with limited prior exposure to pathogens and behavioral factors, can place juveniles at greater risk of acquiring and succumbing to a pathogen. We studied the ontogenetic susceptibility of terrest...
متن کاملCorticotropin-releasing factor regulates the development in the direct developing frog, Eleutherodactylus coqui.
Direct developing frogs lack a free-living larval phase, such that miniature adults hatch directly from the eggs. Even under such extreme reorganization of the ancestral biphasic developmental pattern, direct developers still undergo thyroid hormone (TH)-dependent post-embryonic development. Hypothalamic regulation of TH synthesis and release plays a central role in controlling the timing of me...
متن کاملGene expression reveals unique skeletal patterning in the limb of the direct-developing frog, Eleutherodactylus coqui.
The growing field of skeletal developmental biology provides new molecular markers for the cellular precursors of cartilage and bone. These markers enable resolution of early features of skeletal development that are otherwise undetectable through conventional staining techniques. This study investigates mRNA distributions of skeletal regulators runx2 and sox9 along with the cartilage-dominant ...
متن کاملLimb development in a "nonmodel" vertebrate, the direct-developing frog Eleutherodactylus coqui.
Mechanisms that mediate limb development are regarded as highly conserved among vertebrates, especially tetrapods. Yet, this assumption is based on the study of relatively few species, and virtually none of those that display any of a large number of specialized life-history or reproductive modes, which might be expected to affect developmental pattern or process. Direct development is an alter...
متن کاملEarly cranial neural crest migration in the direct-developing frog, Eleutherodactylus coqui.
Direct development is a common reproductive mode in living amphibians characterized by absence of the free-living, aquatic larval stage. In Eleutherodactylus, a species-rich genus of New World frogs, evolution of direct development from the ancestral biphasic ontogeny is correlated with a comprehensive modification in embryonic cranial patterning, including the loss of many larval-specific comp...
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ژورنال
عنوان ژورنال: Journal of Experimental Biology
سال: 1990
ISSN: 1477-9145,0022-0949
DOI: 10.1242/jeb.152.1.129