Requirements of Tilapia zillii for essential fatty acids.

Kanazawa, Akio; Teshima, Shin‐ichi; Sakamoto, Mineshi; Awal, Md. Abdul

doi:10.2331/suisan.46.1353

Cited by 133 publications

(91 citation statements)

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“…Present finding is consistent with earlier reports that high dietary linseed oil lowered the growth performance of tilapia (Li et al, 2016;Francis et al, 2006). Moreover, earlier reports indicate that high dietary n-3 polyunsaturated fatty acids (PUFAs) depressed growth in hybrid tilapia and tilapia zillii (Huang et al, 1998;Kanazwa et al, 1980). In contrast, replacing FO with linseed oil at higher levels had no effect in the growth of Atlantic salmon and Murray cod (Menoyo et al, 2005;Turchini et al, 2011).…”

Section: Discussionsupporting

confidence: 83%

Dietary effect of varying linseed oil compositions on growth response, survival and polyunsaturated fatty acid levels in Tilapia (Oreochromis niloticus)

Omolo¹,

Onyango²,

Magoma³

et al. 2017

Int. J. Fish. Aquac.

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The present study evaluated the impact of varying dietary linseed oil composition on growth, survival and tissue polyunsaturated fatty acids (PUFA) profiles in Nile tilapia (Oreochromis niloticus). Five isonitrogenious diets with varying linseed and sunflower oil concentrations were formulated and fish fed twice daily to for 3 months. Commercial diet was used as a control in triplicate tanks set for each diet treatment. Growth parameters were measured from changes in body weight and length. A 75:25 ratio of sunflower oil to linseed oil gave a better survival and specific growth rate than 100% linseed oil or 100% sunflower oil. Tissue PUFA composition were determined using gas chromatography. High dietary linseed oil composition (100%) resulted into significantly high (P<0.05) total n3 fatty acids (9.9-25%) and DHA (1.8-7.9%) in muscles whereas liver n3 fatty acids and DHA composition ranged between 9.3-25.5 and 0.7-2.6%, respectively. Muscle and liver n3/n6 ratio ranged between 0.7-2.2 and 0.7-2.6 while tissue arachidonic acid (ARA 20.4 n6) content ranged between 2.6-3.5% in muscles and 3.4-4.5% in the liver. ARA 20.4 n6 values were low relative to the dietary precursor, linoleic acid, LA, 18.2 n6. Fatty acid deposition in the tissues increased with the feeding period with the third feeding month recording significantly higher DHA, total n3 and n3/n6 ratio. Based on the result, dietary linseed oil > 50% reduced growth and survival rate in tilapia, however, it increased tissue accumulation of essential fatty acids which also increased with the length of feeding period.

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Section: Discussionsupporting

confidence: 83%

Dietary effect of varying linseed oil compositions on growth response, survival and polyunsaturated fatty acid levels in Tilapia (Oreochromis niloticus)

Omolo¹,

Onyango²,

Magoma³

et al. 2017

Int. J. Fish. Aquac.

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“…II), both of these oil supplementations in the broodstock diet were considered necessary for efficient breeding response as evidenced in D-V. However, the greater breeding response in the D-III groups than in D-IV might be due to the presence of high amounts of both 18:2(n-6) and 20:4(n-6) and conversion of 18:2(n-6) to 20:4(n-6) PUFA [23,40,41] which has a stimulatory effect on the ovarian follicles in steroid production [28].…”

Section: Discussionmentioning

confidence: 99%

“…Freshwater fish receive an appreciable amount of 18:3(n-3) through dietary intake of natural fish food organisms [35] which predominantly have this fatty acid. In addition they are generally capable of converting this fatty acid to the higher homologues [22,23,30,36,[40][41][42] such as 20:5(n-3) and 22:6(n-3). However, it has been reported [8] that the rainbow trout cannot convert 18:3(n-3) to 22:6(n-3) at significant rates and may not be able to fulfil their higher requirement of 22:6(n-3), particularly during gonadal maturation and their incorporation into the lipid of egg yolk.…”

Section: Discussionmentioning

confidence: 99%

Effect of dietary supplementation of fatty acids and vitamins on the breeding performance of the carp Catla catla

et al. 2001

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-Five isonitrogenous diets (∼33% crude protein) were fed to the brood female carp, Catla catla (weighing 3.0 to 5.5 kg), for a period of 93 days in order to observe their breeding performance in earthen ponds. Diet-I (control) contained only basic ingredients like rice bran, groundnut oil cake, roasted soybean meal, fish meal and mineral mixture; diet-II contained added vitamins; diet-III contained added vitamins and vegetable oil (rich in n-6 polyunsaturated fatty acids, PUFA); diet-IV contained added vitamins and fish oil (rich in n-3 PUFA); and diet-V contained added vitamins and a mixture of vegetable and fish oils. The results showed that nutritional quality of the diet considerably influenced breeding performance in the species. The total number of matured females was the highest in the diet-V group and maturity was advanced by 35 days in this group compared to the control. In diet-III and diet-V groups, all the maturated females bred fully and the relative fecundity was increased significantly in diet III, IV and V. The maximum (73.4%) fertilisation rate was observed in the diet-V group, followed by 61.3%, 56.8%, 49% and 22.7% in diet-I, diet-IV, diet-III and diet-II groups respectively. Most of the eggs in the diet-II treatment group remained immature. The various data thus obtained suggest that dietary supplementation of both n-3 and n-6 PUFA, is essential to improve gonadal maturation, breeding performance and spawn recovery in the Catla female broodstock. diet / fatty acid / broodstock / breeding performance / Catla Reprod. Nutr. Dev. 41 (2001) 365-375 365

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“…현재 국내에서 는 상업적으로 개발된 메기 배합사료들이 생산되어 판매되고 있으나, 메기용 배합사료 개발을 위한 연구로는 대두박 이용 성에 관한 연구 (Kim et al, 2009) 사육실험 종료시, 어체의 수분, 조단백질, 조지질 및 조회분 함량은 모든 실험구간에 유의한 차이가 없었다 (Table 4). 어체 의 극성 및 비극성 지질의 지방산 조성 변화를 Table 5와 (Castell et al, 1972a,b,c)는 18:2n-6을 필수지방산으로 요구하지만 잉어 (Cyprinus carpio) (Takeuchi and Watanabe, 1977)와 뱀장어 (Anguilla japonica) (Takeuchi et al, 1980)는 18:2n-6과 18:3n-3을 모두 필요로 하며, 틸라피아 (Oreochromis niloticus) (Kanazawa et al, 1980 Ideas et al, 1996). 일반적으로 양식어의 지방산 조성은 사료 지질의 지방산 조성에 영향을 받는 것으로 알려져 있는 데 (Silver et al, 1993;Geurden et al, 1997;Lee and Lim, 2005), 본 연구에서도 어체의 지방산 조성은 사료 지질의 지방 산 조성과 유사한 변화 경향을 보였다.…”

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Effects of Dietary Lipid Sources on the Growth and Body Composition of the far Eastern Catfish, Silurus asotus

Kim¹,

Kim²,

Lim³

et al. 2010

Korean Journal of Fisheries and Aquatic Sciences

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This study investigated the effects of dietary lipid sources on growth performance and body composition of juvenile far eastern catfish, Silurus asotus. Three replicate groups of fish (average weight 3.6 g) were fed with one of the following experimental diets containing 10% beef tallow (BT), 5% BT plus 5% corn oil (CO), 5% BT plus 5% linseed oil (LO), or 5% BT plus 5% squid liver oil (SO) as the lipid source for 5 weeks. No significant difference was observed in the survival among groups. The weight gain of fish fed the LO (high in 18:3n-3) and SO (high in n-3 highly unsaturated fatty acid) diets was significantly higher than that of the fish fed the CO (high in 18:2n-6) and BT diets (P<0.05). The feed efficiency of fish fed LO and SO diets was significantly higher than that of the fish fed the BT diet (P<0.05), but not significantly different from that of the fish fed the CO diet. The protein efficiency ratio of fish fed the SO diet was significantly higher than that of fish fed the CO and BT diets (P<0.05), but not significantly different from that of fish fed the LO diet. The 18:1n-9 of whole-body polar lipid fraction in fish fed the BT diet increased compared to that of fish fed the other diets. Fish fed the CO and LO diets had significantly higher contents of 18:2n-6 and 20:4n-6, and 18:3n-3, than the fish fed the other diets in polar and non-polar lipid fractions, respectively (P<0.05). Significantly higher contents of 20:5n-3 and 22:6n-3 were observed in the whole-body polar lipid fraction of fish fed the SO diet compared with fish fed the other diets (P<0.05). The study results indicate that linseed oil and squid liver oil containing n-3 fatty acids are good dietary lipid sources for the growth of far eastern catfish.

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Requirements of Tilapia zillii for essential fatty acids.

Cited by 133 publications

References 0 publications

Dietary effect of varying linseed oil compositions on growth response, survival and polyunsaturated fatty acid levels in Tilapia (Oreochromis niloticus)

Dietary effect of varying linseed oil compositions on growth response, survival and polyunsaturated fatty acid levels in Tilapia (Oreochromis niloticus)

Effect of dietary supplementation of fatty acids and vitamins on the breeding performance of the carp Catla catla

Effects of Dietary Lipid Sources on the Growth and Body Composition of the far Eastern Catfish, Silurus asotus

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