Dietary substitution effect of Ulva australis for Undaria pinnatifida on growth, body composition and air exposure of juvenile abalone, Haliotis discus (Reeve 1846)

Substitution effect of Undaria pinnatifida with citrus ( Citrus unshiu , Marcovitch) peel by‐product in feed on the growth, body composition and air exposure stressor of juvenile abalone ( Haliotis discus , Reeve 1846)

“…All formulated diets substituting U. pinnatifida with CPB produced the superior shell growth and soft body weight of abalone to those of abalone fed the dry U. pinnatifida in this study, agreeing with other studies showing that shell growth of abalone fed the nutritionbalanced diets was greater than that of abalone fed the U. pinnatifida (Ansary et al, 2019b(Ansary et al, , 2019aChoi et al, 2018;Jang et al, 2018).…”

“…Higher weight gain and SGR of abalone fed all formulated diets compared to those of abalone fed the dry U. pinnatifida in this study was well supported by other studies showing the nutrition‐balanced formulated diets achieved improvement in growth performance of abalone over the single MA, such as Macrocystis pyrifera Linnaeus, Gracilariopsis bailinae Zhang and Xia, U. pinnatifida or S. japonica (Ansary et al, , ; Bautista‐Teruel & Millamena, ; Cho, Park, Kim, Yoo, & Lee, ; Choi et al, ; Jang et al, ; Jung et al, ; Myung et al, ; Viana, López, & Salas, ). Especially, rice bran was the good alternative source for S. japonica in abalone feed when 200 g/kg S. japonica was included (Kim et al, ).…”

“…pinnatifida in this study, agreeing with other studies showing that shell growth of abalone fed the nutrition‐balanced diets was greater than that of abalone fed the U . pinnatifida (Ansary et al, , ; Choi et al, ; Jang et al, ). Abalone fed the CPB500 diet achieved the greatest shell length and width and soft body weight of abalone, which was directly reflected from the greatest growth performance of abalone in this study.…”

“…After the 16‐week feeding trial, abalone were subjected to air exposure stressor based on Lee et al () and Ansary et al () studies. Twenty abalone from each net cage were randomly chosen to test air exposure stressor, and rest abalone were removed from each cage.…”

Flakes versus noodles as feed for the abalone Haliotis asinina , does form matter?

“…Aside from the noodle form commonly used in feeding experiments at SEAFDEC/AQD, other abalone diet forms include 0.15 cm thick sheets, cut into 1 cm 2 (Ansary et al, 2019;Choi et al, 2018;Jung et al, 2016;Kim et al, 2016); 2 × 2 × 3.5 cm cubes (Angell et al, 2012); 0.5 cm dia tablets (Susanto et al, 2016); 4 × 3 × 2 mm flat pellets (Bansemer et al, 2014); pellets (Yun et al, 2018); and powder, crumble and chips (Kirkendale et al, 2010), among others. For a crawling grazer, however, a very thin and flattened feed may be easier to access and forage.…”