Influence of fish oils in production catfish feeds on selected disease resistance factors

J. T B Lingenfelser, V. S. Blazer, J. Gay

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Healthy channel calfish, Ictalurus punctatus (mean weight: 62.5g), were fed two production feeds that were identical except for the lipid portion, which was either catfish oil or menhaden oil. Fish were held at 18 or 28°C and fed the experimental feeds for four monlhs. A subsample of fish from each of the four treatments was then used to measure scrum antibody titers to Edwardsiella ictaluri, macrophage phagocytic index, phagocytic capacity, and production of intracellular and extracellular superoxide anion. The remaining fish were vaccinated with an E. icraluri bacterin, held for 18-24 days, and the assays were repeated. Fatty acid profiles of the diets indicated catfish oil had a higher percentage of monounsaturated fatty acids and slightly higher n-6 fatty acids. The menhaden oil diet had a higher percentage of the n-3 fatty acids. At 28°C, weight gain and feed conversion were slightly higher in calfish fed the feed containing menhaden oil. Weight gains and feed conversion were similar in fish maintained on the two feeds at 18°C. At the lower temperature, fish fed the diet containing menhaden oil appeared to have enhanced disease resistance factors, particularly phagocytic capacity. However, at 28°C, fish fed the diet containing catfish oil had enhanced phagocytic ability and intracellular superoxide production. Antibody titers were not sigmficantly (P > 0.05) affected by dietary lipid in this study. Vaccination amplified phagocytic ability in both diets at both temperatures and intensified the production of superoxide anion at 28°C.

Original languageEnglish (US)
Pages (from-to)37-48
Number of pages12
JournalJournal of Applied Aquaculture
Volume5
Issue number2
DOIs
StatePublished - Oct 27 1995

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disease resistance
fish oils
catfish
menhaden oil
oil
fish
diet
fatty acid
superoxide anion
oils
fish feeds
antibody
anion
feed conversion
lipid
weight gain
Edwardsiella ictaluri
antibodies
vaccination
omega-6 fatty acids

All Science Journal Classification (ASJC) codes

  • Ecology
  • Aquatic Science

Cite this

Lingenfelser, J. T B ; Blazer, V. S. ; Gay, J. / Influence of fish oils in production catfish feeds on selected disease resistance factors. In: Journal of Applied Aquaculture. 1995 ; Vol. 5, No. 2. pp. 37-48.
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Influence of fish oils in production catfish feeds on selected disease resistance factors. / Lingenfelser, J. T B; Blazer, V. S.; Gay, J.

In: Journal of Applied Aquaculture, Vol. 5, No. 2, 27.10.1995, p. 37-48.

Research output: Contribution to journalArticle

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