Diet of shovelnose sturgeon and pallid sturgeon in the free-flowing Mississippi River
Gut contents of shovelnose and pallid sturgeon from the lower and middle Mississippi River were obtained by colonic flushing, a safe and easily implemented alternative to gastric lavage. Diets of both species were dominated numerically by immature Trichoptera, Ephemeroptera, and Diptera. Primary pre...
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Published in | Journal of applied ichthyology Vol. 23; no. 4; pp. 494 - 499 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Oxford, UK
Oxford, UK : Blackwell Publishing Ltd
01.08.2007
Blackwell Publishing Ltd |
Subjects | |
Online Access | Get full text |
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Summary: | Gut contents of shovelnose and pallid sturgeon from the lower and middle Mississippi River were obtained by colonic flushing, a safe and easily implemented alternative to gastric lavage. Diets of both species were dominated numerically by immature Trichoptera, Ephemeroptera, and Diptera. Primary prey, based on volume, for shovelnose sturgeon were Trichoptera, and for pallid sturgeon were various fishes. Geographic and seasonal nuances in diet were observed for both species, but the general dichotomy of shovelnose sturgeon as browser on invertebrates and pallid sturgeon as predator on fishes did not change. Data indicate that both species require hard substrates for feeding. Data demonstrate that colonic flushing is an effective technique for describing diet and inferring ecological and behavioral information about sturgeon. |
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Bibliography: | http://dx.doi.org/10.1111/j.1439-0426.2007.00893.x ArticleID:JAI893 istex:4844BA041787FB116A4264C14476C1C08E992F24 ark:/67375/WNG-F418KJ1X-L ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Article-1 ObjectType-Feature-2 |
ISSN: | 0175-8659 1439-0426 |
DOI: | 10.1111/j.1439-0426.2007.00893.x |