Abstract

CAMPANA TORRES, Alfredo; MARTINEZ CORDOVA, Luis R.; VILLARREAL COLMENARES, Humberto  and  CIVERA CERECEDO, Roberto. Apparent dry matter and protein digestibility of vegetal and animal ingredients and diets for pre-adult Australian redclaw crayfish Cherax quadricarinatus (von Martens 1858). Hidrobiológica [online]. 2006, vol.16, n.1, pp.103-106. ISSN 0188-8897.

Apparent dry matter and protein digestibility of four animal and three vegetal ingredients and diets with them included, were evaluated for pre-adult Cherax quadricarinatus. The ingredients were: two sardine meals (67% and 58% crude protein), squid meal, red crab meal, soy paste, textured wheat, and sorghum meal. A reference and seven experimental diets were formulated including 14.5% of each ingredient in the reference diet, and 0.5% of chromic oxide as a marker. Vegetal ingredients and the corresponding diets, had higher digestibility than animal ingredients. Textured wheat, soy paste, and sorghum meals showed an excellent dry matter/digestibility (> 86%). The digestibility of protein was better in textured wheat, and soy paste meals (> 87%). Some animal ingredients such as, squid meal, and sardine meal 67% CP, had acceptable dry matter digestibility (over 65%). It is concluded that pre-adult redclaw is omnivorous and able to efficiently consume vegetal and animal ingredients, but they can digest better the vegetal ingredients.

Keywords : Crustacean nutrition; Cherax quadricarinatus; digestibility; vegetal and animal ingredients; diets.

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