Document Detail


Balancing food availability and hydrodynamic constraint: phenotypic plasticity and growth in Simulium noelleri blackfly larvae.
MedLine Citation:
PMID:  16187108     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Organisms through phenotypic plasticity can cope with multiple changed environmental conditions. Theory predicts that animals in streams and rivers should be able to balance demands of the needs to obtain food efficiently and to adjust response to hydrodynamic variability. This study examined effects of variations in food availability and current velocity on the feeding structure and growth rate of Simulium noelleri blackfly larvae. The larvae developed larger labral fans and more rays under slow current and low food regimes than in fast current and high food conditions. In both fast and slow current regimes, growth rates were higher and development periods to the final-instar stage were shorter in high food treatments. The estimated flux rates of food particles through labral fans under high food treatments for both fast and slow current regimes were higher than those under low food treatments. Although both food and current velocity appeared to have selected for flexibility of feeding structure and growth rate, food availability was a more important factor for phenotypic and developmental plasticity than current velocity. The results indicate a strong link between environmental changes in food availability and current velocity, phenotypic plasticity, and growth rate of S. noelleri. This study suggests that plasticity of ecomorphs with macroevolutionary significance may play a role in the early evolutionary stages of blackfly larvae.
Authors:
Yixin Zhang
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2005-09-27
Journal Detail:
Title:  Oecologia     Volume:  147     ISSN:  0029-8549     ISO Abbreviation:  Oecologia     Publication Date:  2006 Feb 
Date Detail:
Created Date:  2006-01-13     Completed Date:  2006-05-09     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0150372     Medline TA:  Oecologia     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  39-46     Citation Subset:  IM    
Affiliation:
Department of Ecology and Biodiversity, University of Hong Kong, Hong Kong, China. yixin@hkucc.hku.hk
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MeSH Terms
Descriptor/Qualifier:
Adaptation, Physiological
Animals
Behavior, Animal
Ecosystem
Environment*
Evolution
Food Supply*
Larva / genetics,  growth & development*
Phenotype*
Simuliidae / genetics,  growth & development*
Survival Analysis

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


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