Substitution effect of white radish (Raphanus sativus L.)’ by-product and tunic of sea squirt (Halocynthia rorentzi, von Drasche) for Undaria pinnatifida in feed of abalone (Haliotis discus, Reeve 1846)

Table 2 Survival (%), weight gain (g/abalone) and specific growth rate (SGR) of juvenile abalone fed the experimental diets substituting Undaria with the dry white radish’ by-product (WRB) and tunic of sea squirt (TSS) for 16 weeks

Experimental diets	Initial weight (g/abalone)	Final weight (g/abalone)	Survival (%)	Weight gain (g/abalone)	SGR^a (%/day)
Control	5.4 ± 0.01	11.1 ± 0.17^b	94.3 ± 2.86^a	5.7 ± 0.18^b	0.63 ± 0.014^b
WRB	5.4 ± 0.03	10.8 ± 0.08^bc	96.2 ± 1.72^a	5.4 ± 0.07^bc	0.60 ± 0.006^bc
TSS	5.4 ± 0.01	11.9 ± 0.09^a	91.4 ± 2.18^a	6.5 ± 0.08^a	0.68 ± 0.006^a
Undaria	5.4 ± 0.01	10.6 ± 0.08^c	94.3 ± 1.43^a	5.2 ± 0.08^c	0.59 ± 0.006^c

Values (means of triplicate ± SE) in the same column sharing the same superscript letter are not significantly different (P > 0.05)
^aSpecific growth rate (SGR, %/day) = [(Ln(Wf) − Ln(Wi))/days of feeding] × 100, where Ln(Wf) = natural log of the final mean weight of abalone and Ln(Wi) = natural log of the initial mean weight of abalone

ISSN: 2234-1757