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Evaluation of stomach tubes and gastric lavage for sampling diets from blue catfish and flathead catfish

North American Journal of Fisheries Management

By:
, , ,
DOI: 10.1577/M02-156

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Abstract

We compared the ability to extract all stomach contents by using stomach tubes or gastric lavage to sample diets from blue catfish Ictalurus furcatus and flathead catfish Pylodictus olivarus. Pulsed gastric lavage (PGL) removed a significantly greater proportion of stomach content mass (95.6%) from blue catfish than did stomach tubes (14.6%). Percent mass of flathead catfish contents removed with PGL (96.0%) was not significantly different from that removed with stomach tubes (86.9%). Based on the greater effectiveness of PGL for blue catfish, combined with a shorter mean time required per sample (69 versus 118 s) and the better preservation of extracted diet material, we recommend using PGL as a nonlethal technique to collect diet samples from large catfishes.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Evaluation of stomach tubes and gastric lavage for sampling diets from blue catfish and flathead catfish
Series title:
North American Journal of Fisheries Management
DOI:
10.1577/M02-156
Volume
24
Issue:
1
Year Published:
2004
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
258
Last page:
261
Number of Pages:
4