Open AccessUSE OF ANIMAL FAT IN FORMULATED DIETS FOR YELLOW PERCH (Perca flavescens)
Author(s) -
Heck Nancy E.,
Calbert Harold E.
Publication year - 1977
Publication title -
proceedings of the annual meeting ‐ world mariculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0164-0399
DOI - 10.1111/j.1749-7345.1977.tb00161.x
Subject(s) - perch , animal fat , biology , fish oil , pellet , food science , zoology , fish meal , soybean oil , soybean meal , pellets , animal feed , fish <actinopterygii> , fishery , ecology , raw material , paleontology
The standard formulated diet used to grow yellow perch (Perca flavescens) in a controlled environment aquaculture system contains vegetable fats in addition to naturally occurring lipids in fish meal. Normal market prices make animal fat financially advantageous over vegetable fat. To determine if animal fat can be substituted for vegetable fat in formulated feed for perch, diets containing 15% (control) and 11.25% added soybean oil; 15% and 11.25% added animal fat; and a 50/50 mixture of 11.25% animal fat and soybean oil were fed to replicate lots of perch fingerlings for 100 days. During feeding trials fish were held in 20°C water with a photoperiod of 16 hr light and 8 hr darkness. The diet containing 11.25% added animal fat produced significantly higher weight gains than the other diets tested. All diets were readily accepted. Both soybean oil and animal fat diets produced fish with approximately the same percentage of body fat (9.1%). Animal fat resulted in a feed pellet that was less oily and easier to handle than pellets made with soybean oil.