High feeding level alters physiological status but does not improve feed conversion efficiency and growth performance of juvenile red swamp crayfish Procambarus clarkii (Girard, 1852)

Effects ofPortulaca oleraceawhole diet on pigments and fatty acids profiles of juvenile red swamp crayfish (Procambarus clarkiiGirard, 1852) under laboratory conditions

“…Vegetable species in crayfish extensive and semi-intensive aquaculture are considered important additional items apart from artificial feeds since they may constitute a relevant integration of P. clarkii diet, without affecting growth performance (Jin, Jacquin, Ren, et al, 2019). In addition (Luo et al, 2021), recently confirmed that this species do not need a high level of feeding, suggesting an additional incentive for farmers to reduce food inputs and production costs.…”

“…P . clarkii in fact did not benefit from high feeding levels provided by commercial artificial diets (Jin, Jacquin, Ren, et al, 2019; Luo et al, 2021). Anyway, there are scanty experimental studies on whole vegetable diets improvement on juvenile crayfish quality.…”

“…Recent studies highlighted the need of refining feeding strategies of P. clarkii, limiting artificial diet amounts and considering the contribution of plant sources, which do not seem to reduce crayfish growth. P. clarkii in fact did not benefit from high feeding levels provided by commercial artificial diets (Jin, Jacquin, Ren, et al, 2019;Luo et al, 2021). Anyway, there are scanty experimental studies on whole vegetable diets improvement on juvenile crayfish quality.…”

“…Crayfish in their natural habitat are considered opportunistic and generalist feeders with the ability to feed on submerged aquatic plants (Longshaw & Stebbing, 2016;Smart et al, 2002). Such characteristic is also maintained by farmed crayfish that naturally integrates artificial diets with macrophytes in intensive or semiintensive cultures (Luo et al, 2021). Recent studies highlighted the need of refining feeding strategies of P. clarkii, limiting artificial diet amounts and considering the contribution of plant sources, which do not seem to reduce crayfish growth.…”

REARING OF Cherax quadricarinatus (Von Martens, 1868) JUVENILES USING FEED FOR STURGEONS

“…На рынке представлены линейки специализированных аквариумных кормов, которые несоизмеримо дороги и неприменимы при промышленном разведении. Проводится изучение и разработка новых способов и рецептур кормления с учетом физиологических особенностей ракообразных (7): поиск альтернатив традиционным компонентам кормов (8,9), включение разнообразных добавок (10)(11)(12)(13) и использование различных режимов кормления (14)(15)(16)(17), но, как показывает практика, это длительное и дорогостоящее мероприятие. При этом слабо изучена возможность применения в раководстве уже зарекомендованных высококачественных кормов для рыб.…”