Temporally Dissociated, Trait-Specific Modifications Underlie Phenotypic Polyphenism in Spea multiplicata Tadpoles, Which Suggests Modularity
نویسندگان
چکیده
منابع مشابه
An inducible offense: carnivore morph tadpoles induced by tadpole carnivory
Phenotypic plasticity is commonplace, and plasticity theory predicts that organisms should often evolve mechanisms to detect and respond to environmental cues that accurately predict future environmental conditions. Here, we test this prediction in tadpoles of spadefoot toads, Spea multiplicata. These tadpoles develop into either an omnivore ecomorph, which is a dietary generalist, or a carnivo...
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Inclusive fitness theory predicts that organisms can increase their fitness by helping or not harming relatives, and many animals modify their behavior toward kin in a manner consistent with this prediction. Morphogenesis also may be sensitive to kinship environment, particularly in species where certain individuals facultatively develop structures that can be used against conspecifics as weapo...
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Tissues from barred tiger salamanders (Ambystoma tigrinum mavortium), Great Plains toads (Bufo cognatus) and New Mexico spadefoots (Spea multiplicata) collected from 16 playa wetlands in Texas during 1999 and 2000 were examined by light microscopy. Digenean cysts were primarily distributed subcutaneously throughout the specimens and occasionally coelomic invasion was noted. The parasites within...
متن کاملEcological opportunity and phenotypic plasticity interact to promote character displacement and species coexistence.
We investigated the roles of resource availability and phenotypic plasticity in promoting ecological character displacement (i.e., trait evolution stemming from resource competition between species). Because ecological character displacement generates new populations that differ in resource use, this process should only occur when exploitable resources are available. We tested this hypothesis i...
متن کاملHow fluctuating competition and phenotypic plasticity mediate species divergence.
Causal evidence linking resource competition to species divergence is scarce. In this study, we coupled field observations with experiments to ask if the degree of character displacement reflects the intensity of competition between two closely related spadefoot toads (Spea bombifrons and S. multiplicata). Tadpoles of both species develop into either a small-headed omnivorous morph, which feeds...
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ژورنال
عنوان ژورنال: TSW Development & Embryology
سال: 2007
ISSN: 1749-4958
DOI: 10.1100/tswde.2007.118