Document Detail

Influence of estuarine hypoxia on feeding and sound production by two sympatric pipefish species (Syngnathidae).
MedLine Citation:
PMID:  17140654     Owner:  NLM     Status:  MEDLINE    
This research utilizes the acoustic behavior of two sympatric pipefish species to assess the impact of hypoxia on feeding. We collected northern, Syngnathus fuscus, and dusky pipefishes, Syngnathus floridae, from the relatively pristine Chincoteague Bay, Virginia, USA and audiovisually recorded behavior in the laboratory of fish held in normoxic (>5 mg/L O(2)) and hypoxic (2 and 1 mg/L O(2)) conditions. Both species produced high frequency ( approximately 0.9-1.4 kHz), short duration (3-22 msec) clicks. Feeding strikes were significantly correlated with both wet weight of ingested food and click production. Thus, sound production serves as an accurate measure of feeding activity. In hypoxic conditions, reduced food intake corresponded with decreased sound production. Significant declines in both behaviors were evident after 1 day and continued as long as hypoxic conditions were maintained. Interspecific differences in sensitivity were detected. Specifically, S. floridae showed a tendency to perform head snaps at the surface. S. fuscus exhibited a breakdown in the coupling of sound production with food intake in 2 mg/L O(2) with clicks produced in other contexts, particularly choking and food expulsion. Reductions in feeding will ultimately impact growth, health, and eventually reproduction as resources are devoted to survival instead of gamete production and courtship. This work suggests acoustic monitoring of field sites with adverse environmental conditions may reflect changes in feeding behavior in addition to population dispersal.
Jennifer L Ripley; Christy M Foran
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-10-20
Journal Detail:
Title:  Marine environmental research     Volume:  63     ISSN:  0141-1136     ISO Abbreviation:  Mar. Environ. Res.     Publication Date:  2007 May 
Date Detail:
Created Date:  2007-02-27     Completed Date:  2007-07-27     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882895     Medline TA:  Mar Environ Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  350-67     Citation Subset:  IM    
West Virginia University, Biology Department, P.O. Box 6057, Morgantown, WV 26506, USA.
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MeSH Terms
Analysis of Variance
Animal Communication*
Anoxia / physiopathology,  veterinary*
Feeding Behavior / physiology*
Fish Diseases / physiopathology*
Sound Spectrography / veterinary
Species Specificity

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

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