Effects of Fish Meal Replacement by a Soybean Protein on Growth, Histology, Selected Immune and Oxidative Status Markers of Gilthead Sea Bream,Sparus aurata

Insect meal derived from chironomid larvae and collected from aquatic environments was included in the feed of gilthead sea bream juveniles (75 ± 1.1 g) in a growth trial of 90 days. Three feeds, which were namely one control (L1) and two experimental diets (L2, L3), were analyzed and formulated as isonitrogenous (45%) and isolipidic (13%). In L1, the protein source was mainly soybean meal (32%), followed by fish meal (20%), wheat meal (20%), gluten corn (17%), and hemoglobin (11%). In L2, the proportion of soybean meal was increased (33.5%), followed by gluten corn (21%), wheat meal (14%), and hemoglobin (11%), whereas the fish meal source was reduced (15%) due to the inclusion of chironomids (5%). In L3, the proportion of fish meal was further reduced (8%) and that of chironomid meal was increased to 10% of the protein source. The L2 and L3 groups showed similar growth performances with respect to the L1 group. The feed conversion rate was favorable in all the groups, ranging from 1.18 (L1) to 1.22 (L3). Survival rates varied from 93.62% (L3) to 94.31% (L1). Feed palatability showed similar results for all diets. Although the inclusion of chironomid meal was used in small quantities, our results suggest a significant advantage in replacing 50% of the fish meal with the chironomid meal for growing gilthead sea bream fishes.

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Partial replacement of fish meal by T-Iso in gilthead sea bream (Sparus aurata) juveniles diets

Italian Journal of Animal Science ◽

10.4081/ijas.2009.s2.869 ◽

2009 ◽

Vol 8 (sup2) ◽

pp. 869-871 ◽

Cited By ~ 8

Author(s):

Giovanni Battista Palmegiano ◽

Francesco Gai ◽

Laura Gasco ◽

Giuseppe Lembo ◽

Maria Teresa Spedicato ◽

...

Keyword(s):

Fish Meal ◽

Sparus Aurata ◽

Gilthead Sea Bream ◽

Sea Bream ◽

Partial Replacement

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The effect of dietary methionine and white tea on oxidative status of gilthead sea bream (Sparus aurata)

British Journal Of Nutrition ◽

10.1017/s0007114511006556 ◽

2011 ◽

Vol 108 (7) ◽

pp. 1202-1209 ◽

Cited By ~ 23

Author(s):

Amalia Pérez-Jiménez ◽

Helena Peres ◽

Vera Cruz Rubio ◽

Aires Oliva-Teles

Keyword(s):

Sparus Aurata ◽

Oxidative Status ◽

Gilthead Sea Bream ◽

Sea Bream ◽

Antioxidant Defences ◽

Sod Activity ◽

White Tea ◽

Notable Increase ◽

Methionine Supplementation ◽

Antioxidant Supplements

Free radicals are continuously generated during an organism's lifetime. In order to understand the involvement in the oxidative status of fish, methionine and white tea were assayed as antioxidant supplements in diets for gilthead sea bream (Sparus aurata). For the purpose of this study, four isonitrogenous and isolipidic diets were formulated to contain 45 % of protein and 18 % lipid and 0·3 % methionine (Met diet), 2·9 % white tea dry leaves (Tea diet) and 2·9 % of white tea dry leaves+0·3 % methionine (Tea+Met diet). An unsupplemented diet was used as the control. Key enzymatic antioxidant defences, superoxide dismutase (SOD) isoenzyme profile, total, reduced and oxidised glutathione and oxidative damage markers were determined. The results showed that dietary methionine supplementation increased liver SOD activity, while white tea induced higher hepatic catalase activity. Dietary white tea induced a notable increase in Mn-SOD isoenzyme. This is the first study to provide evidence that dietary tea inclusion in fish feeding could be an important source of Mn with metabolic repercussions on antioxidant mechanisms.

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