Document Detail

Adaptive morphological shifts to novel habitats in marine sculpin fishes.
MedLine Citation:
PMID:  23316868     Owner:  NLM     Status:  Publisher    
Sculpin fishes of the North American Pacific Coast provide an ideal opportunity to examine whether adaptive morphological character shifts have facilitated occupation of novel habitat types because of their well-described phylogeny and ecology. In this group, the basal-rooted species primarily occupy the subtidal habitat, whereas the species in the most distal clades are found in the intertidal. We tested multiple evolutionary models to determine whether changes in body size and changes in number of scales are adaptive for habitat use in sculpins. Based on a statistically robust, highly resolved molecular phylogeny of 26 species of sculpins, in combination with morphometric and habitat affinity data, our analyses show that an adaptive model based on habitat use best explains changes in body size and number of scales. The habitat model was statistically supported over models of neutral evolution, stabilizing selection across all habitats, and three clade-based models. We suggest that loss of scales and reduction of body size in the intertidal may facilitate cutaneous breathing in air when tidepools become hypoxic during low tides. This study demonstrates how the combined use of phylogenetic, ecological and statistical approaches helps to identify traits that are likely adaptive to novel habitats.
M L Knope; J A Scales
Related Documents :
1391138 - Confidence limit analyses should replace power calculations in the interpretation of ep...
23457338 - Tissue shrinkage and stereological studies.
24098098 - Tops: a framework to manipulate probabilistic models of sequence data.
24177808 - Temporal-spatial heterogeneity in animal-environment contact: implications for the expo...
16984948 - Occupational exposure to mineral fibres: analysis of results stored on colchic database.
24584728 - Accuracy and feasibility of dual fluoroscopy and model-based tracking to quantify in vi...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-14
Journal Detail:
Title:  Journal of evolutionary biology     Volume:  -     ISSN:  1420-9101     ISO Abbreviation:  J. Evol. Biol.     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8809954     Medline TA:  J Evol Biol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2013 The Authors. Journal of Evolutionary Biology © 2013 European Society For Evolutionary Biology.
Department of Biology, Stanford University, Stanford, CA, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Repeatability and reproducibility of corneal thickness using SOCT Copernicus HR.
Next Document:  Positron emission tomography imaging of tumor angiogenesis with a (61/64)Cu-labeled F(ab')(2) antibo...