Feeding by the Great Basin Spadefoot Toad (Spea intermontana [Cope]) (Anura: Pelobatidae)
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چکیده
منابع مشابه
Ontogeny of corticotropin-releasing factor effects on locomotion and foraging in the Western spadefoot toad (Spea hammondii).
We investigated the effects of corticotropin-releasing factor (CRF) and corticosterone (CORT) on foraging and locomotion in Western spadefoot toad (Spea hammondii) tadpoles and juveniles to assess the behavioral functions of these hormones throughout development. We administered intracerebroventricular injections of ovine CRF or CRF receptor antagonist alphahelical CRF((9-41)) to tadpoles and j...
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Condition- or context-dependent mate choice occurs when females modify their mate preferences depending on their internal or external environment. While the ecological and evolutionary factors that favor the evolution of such plasticity are emerging, relatively little is known of the mechanisms underlying such choice. Here we evaluated whether leptin, a protein hormone involved in the regulatio...
متن کاملPolystoma nacialtuneli n. sp. (Monogenea: Polystomatidae) from the eastern spadefoot, Pelobates syriacus (Pelobatidae) in Turkey.
Polystoma nacialtuneli n. sp. is described from the urinary bladder of the eastern spadefoot, Pelobates syriacus from Turkey. This is the fifth polystome species known from Turkey and the third species in Pelobates. We show that this new parasite species can be distinguished from other polystome species in the area by a combination of characteristics, including parasite size and the shape and s...
متن کاملEndocrine mechanisms underlying plasticity in metamorphic timing in spadefoot toads.
Amphibian larvae respond to heterogeneous environments by varying their rates of growth and development. Several amphibian species are known to accelerate metamorphosis in response to pond drying or resource restriction. Some of the most extensive studies to date on developmental responses to pond drying have been conducted on species of spadefoot toads (family Pelobatidae). We have found that ...
متن کاملPhylogenetic relationships of Pelobatoidea re-examined using mtDNA.
Pelobatoidea is a clade of ancient anurans with obscure relationships to the remaining clades of frogs. We used partial sequences of two mitochondrial genes (cytochrome b and 16S RNA) from all Pelobatoidea subclades, including all species of Pelobatidae and Pelodytidae and four outgroup taxa (Xenopus, Ascaphus, Discoglossus, and Rana), to propose a phylogenetic hypothesis for relationships with...
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ژورنال
عنوان ژورنال: Western North American Naturalist
سال: 2008
ISSN: 1527-0904
DOI: 10.3398/1527-0904(2008)68[241:fbtgbs]2.0.co;2