Inclusion of fish and krill meal in extruded diets forOctopus vulgaris(Cuvier, 1797): assessment of acceptance

Performance of raw material thermal treatment on formulated feeds for common octopus (Octopus vulgaris) ongrowing

“…All these studies were performed in similar culture systems and with similar rearing temperatures (≈18.5°C). Up to now, prepared diets including meal as raw material were reported to perform worse than both natural diets and feeds based on freeze-dried ingredients (Estefanell et al, 2013;Querol et al, 2013Querol et al, , 2014a. In the present study, Mb showed the highest ingestion (10.98 g day −1 in a dry basis); but FDb was not so markedly lower (7.58 g day − 1 ).…”

“…Nonetheless, any of the tested diets has ever obtained similar growth to crab (Cerezo Valverde et al, 2008). It is interesting that octopi fed with Mb displayed better growth performance when compared with those fed with fish meal (Querol et al, 2014a). On the other hand, FDb presented a better feed efficiency (FE) than Mb, being higher than that obtained with crab, similar to that of FMK and bogue, but lower than fish meal and 3FMK (Table 2).…”

“…Besides being interesting from the nutritional point of view, crustacean species also act as an attractant in formulated feeds. Nonetheless, egg yolk was included to maximize the attraction of the prepared feeds, since it was previously identified as an efficient Table 2 Growth, ingestion and feed efficiency for FDb (freeze-dried bogue) and Mb (bogue meal), for natural diets (Bogue and Crab (Cerezo Valverde et al, 2008)) and for other formulated diets, such as S = freeze-dried European flying squid (Morillo-Velarde et al, 2012), fish meal (Querol et al, 2014a) and a mixture of fish and krill meals (Querol et al, 2013), where 3FMK diet contained fish meal in a triple proportion with respect to the FMK diet. Data as mean ± S.D.…”

“…In Table 2, a comparison regarding growth (AGR and SGR), ingestion (AFR and SFR) and feed efficiency (FE and FCR) indices obtained with FDb and Mb is made with the results obtained by Morillo-Velarde et al (2012), using a European flying squid freeze-dried based diet (S); by Querol et al (2013Querol et al ( , 2014a, with diets containing fish and krill meals in different proportions (FMK and 3FMK); as well as with natural diets, such as crab (Cerezo Valverde et al, 2008) and bogue . All these studies were performed in similar culture systems and with similar rearing temperatures (≈18.5°C).…”

“…In this sense, various raw materials -other cephalopods Morillo-Velarde et al, 2012), fish (Estefanell et al, 2013; and crustacean species (Cerezo Valverde et al, 2008;Estefanell et al, 2013;Querol et al, 2014a); bindersalginate (Cerezo Valverde et al, 2008; and gelatin (Cerezo Valverde et al, 2008;Estefanell et al, 2013;; and raw material preparation -fresh (Cerezo Valverde et al, 2008); dried (Estefanell et al, 2013;Querol et al, 2013) or freezedried (Morillo-Velarde et al, 2012), were recently evaluated. However, results regarding the effects of thermal treatment applied to natural food for cuttlefish (Domingues et al, 2009) should not be overlooked because commercial meals are normally processed applying high temperature (≈100°C).…”