Abstract
Abstract In this study, the effects on whole body fatty acid levels of goldfish larvae (Carassius auratus) caused by different feeding times T(1–4) and diets D(1–3) were investigated during the early larval stages which is the first 15 days’ of feeding. Fatty acid levels for all experimental groups were found to be: 1.54 to 3.45% for myristic acid, 17.57 to 22.68% for palmitic acid, 28.81 to 41.16% for total saturated fatty acids-∑SFA, 2.37 to 4.04% for palmitoleic acid, 13.79 to 39.21% for oleic acid, 22.60 to 47.59% for total monounsaturated fatty acids-∑MUFA, 3.62 to 7.69% for linolenic acid-ALA, 0.35 to 1.11% for arachidonic acid-ARA, 7.50 to 9.76% for total n-6 fatty acids-∑ n-6, 1.04 to 2.28% for linoleic acid-LA, 0.81 to 2.52% for eicosapentaenoic acid-EPA and 5.56 to 10.28% for docosahexaenoic acid-DHA. The total n-3 acids-∑ n-3, total polyunsaturated fatty acids-∑PUFA, PUFA/SFA ratio, ∑ n-6/∑ n-3 and DHA/EPA ratio of the experimental groups were determined to be 7.24 to 14.83%, 14.73 to 23.46%, 0.47 to 0.73, 0.58 to 1.04 and 3.21 to 8.7, respectively. In conclusion, the whole body fatty acid levels of goldfish larvae (Carassius auratus) determined in this study revealed the significant effects of different feeding times (T1–4) and different diets (D 1–3) using (P < 0.05).
Highlights
Lipids are the source of essential dietary fatty acids that provide energy for growth and the survival of the fish
The aim of this study was to determine the effects of four different feeding times (T1–4) with three different diets (D1–3) on the whole body fatty acid profiles of goldfish larvae during the early larval stage
The amount of body fatty acid of larval groups fed with live feed for the same period varied depending on the test diets
Summary
Lipids are the source of essential dietary fatty acids that provide energy for growth and the survival of the fish. Fish require fatty acids with a lower melting temperature and longer-chain unsaturated fatty acids relative to mammals. These fatty acids increase stress resistance and are essential in developing the nerve tissues (Parameshwaran et al, 2002). Freshwater fish need either linoleic (18: 2n-6), linolenic acids (18: 3n-3) or both in their diets, whereas marine fish require eicosapentaenoic (EPA) (20: 5n-3) and docosahexaenoic acids (DHA) (22: 6n-3). The fatty acids requirements of ornamental fish larvae are not sufficiently documented (Sales & Janssens, 2003)
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