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Fish protein substrates can substitute effectively for poultry by‐product meal when incorporated in high‐quality senior dog diets
Author(s) -
Zinn K. E.,
Hernot D. C.,
Fastinger N. D.,
KarrLilienthal L. K.,
Bechtel P. J.,
Swanson K. S.,
Fahey G. C.
Publication year - 2009
Publication title -
journal of animal physiology and animal nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.651
H-Index - 56
eISSN - 1439-0396
pISSN - 0931-2439
DOI - 10.1111/j.1439-0396.2008.00826.x
Subject(s) - fish meal , food science , meal , biology , immune system , hydrolysate , soybean meal , zoology , fish <actinopterygii> , biochemistry , fishery , immunology , ecology , hydrolysis , raw material
Summary An experiment was conducted to analytically define several novel fish substrates and determine the effects of feeding diets containing these substrates on total tract nutrient digestibilities and on immune status of senior dogs. The control diet contained poultry by‐product meal while test diets contained 20% milt meal (MM), pink salmon hydrolysate (PSH) and white fish meal (WFM) added at the expense of poultry by‐product meal. Concentrations of lymphocytes positive for CD3, CD4, CD8α and CD21 cell‐surface markers and immunoglobulin concentrations were measured. Gene expression of cytokines tumour necrosis factor (TNF)‐α, interleukin (IL)‐6, interferon (IFN)‐γ, IL‐10 and transforming growth factor (TGF)‐β was determined by quantitative real‐time polymerase chain reaction. Major compositional differences were noted among fish substrates but apparent nutrient digestibility coefficients and immune indices were not affected by treatment. Fish protein substrates were found to be effective substitutes for poultry by‐product meal, providing diets of high nutritive value for senior dogs.