Growth, partial energy balance, mantle and digestive gland lipid composition of Octopus vulgaris (Cuvier, 1797) fed artificial diets with two different binders.
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AuthorsGarcía, S. (Sandra); Rodrigues-dos-Santos-Domingues, P.M. (Pedro Miguel); Hachero-Cruzado, I. (Ismael); Garrido, D. (Diego); Rosas, C. (Carlos)
The effects of two binders (gelatine and alginate), were tested on growth, survival, partial energy balance and lipid composition of the mantle and digestive gland of O. vulgaris . Thirty animals were individually placed in 30 cylindrical tanks of 80 L in water volume each. Octopus average weight was of 713.0±127.9 g at the start of the experiment. Octopuses were fed with 10% (wet weight of food/wet weight of the animal) (% bw d -1 ) once a day at 09:00 h. The three diets were tested (10 octopuses per diet: 1) squid ( Loligo gahi ) as a control diet, 2) GEL, composed of squid paste ( Loligo gahi ) (30%), fish hydrolyse CPSP ® (10%), and high quality fish flower (50%), agglutinated with 10% of gelatine and 3) ALG, composed of squid paste ( Loligo gahi ) (30%), fish hydrolyse CPSP ® (10%), and high quality fish flower (50%), all agglutinated with 10% of alginate. Water temperature was of 15±1 ºC and a natural photoperiod during February and March 2008 was used. ...