Evaluation of different dietary additives based on growth performance, innate immunity and disease resistance in juvenile Amur catfish, Silurus asotus

Abstract

Three different dietary additives were evaluated based on growth performance, innate immune responses and disease resistance in juvenile Amur catfish Silurus asotus. Four diets were prepared by supplementing 0.4% Song-gang Ò stone (SG), 0.05% Yucca meal (YM), 0.05% b-glucan (BG) in combination with 0.04% SG and 0.05% BG (SG ? BG) to a basal commercial diet (control; CONT). Triplicate groups of fish averaging 4.95 ± 0.05 g were fed one of the test diets between 3 and 5% body weight for 8 weeks. At the end of the feeding trial, weight gain, specific growth rate, feed efficiency and protein efficiency ratio of fish fed SG and SG ? BG were significantly higher than those of fish fed the BG and CONT diets (P \ 0.05). Lysozyme activity in fish fed the SG, YM, and SG ? BG diets was significantly higher than those of fish fed the CONT diet. Super oxide dismutase (SOD) activity was significantly higher among fish fed the SG, YM, BG and SG ? BG diets than fish fed the CONT diet. After 14 days challenge test with Edwardsiella tarda, cumulative survival rates of fish fed the SG and SG ? BG diets were significantly higher than those of fish fed the BG and CONT diets. Results revealed that dietary SG or SG ? BG diets had positive responses over other additives in juvenile Amur catfish. However, Song-gang Ò stone is proposed to be a cheaper dietary additive contributing 0.04 cents/kg of feed based on economic point of view.

Beneficial roles of Song-Gang stone as a feed additive in aquaculture: a review

“…These increases were comparable to beneficial responses observed in response to other dietary additives, leading the authors to conclude that this mineral supplement has potential applicability as a replacement for antibiotic treatments currently in use. A similar trial of SGS dietary supplementation in juvenile Amur catfish (S. asotus) demonstrated significant growth and immune status enhancements as compared with controls, also suggesting that this mineral feed additive offers an economically appealing option for improved performance in this species (Amoah et al, 2017). Bae et al (2008) investigated the effects of dietary supplementation of SGS either alone or in combination with a "feed stimulant" in juvenile Japanese eels (Anguilla japonica).…”

Dietary Supplementation of a Mixture of Saponin-Rich Plants to Reduce Ammonia-Nitrogen Excretion in Juvenile Nile Tilapia (<i>Oreochromis</i> <i>niloticus</i>)

“…Other studies showed divergent effects of a Y. shidigera supplementation in different fish species. Amoah et al [10] indeed reported a beneficial impact of a 500ppm Y. schidigera meal on growth performances in juvenile Amur catfish (Silurus asotus), whilst Tidwell et al showed that the use of a supplementation with 1100ppm Y. schidigera extract in juvenile channel catfish (Ictalurus punctatus) in recirculated aquaculture system led to decrease performances and feed utilization [11].…”

Quillaja saponaria and/or Yucca schidigera ameliorate water quality, growth performance, blood health, intestine and gills histomorphology of Nile tilapia, Oreochromis niloticus

“…It has been reported that dietary QS extract can enhance the growth of common carp (Francis et al, 2002;Serrano, 2013;Serrano et al, 2000) and Nile tilapia (Elkaradawy et al, 2021;Francis et al, 2001). On the other hand, previous studies have demonstrated that YS can enhance the growth of catfish (Amoah et al, 2017;Güroy et al, 2014;Kelly & Kohler, 2003), carp (Dawood et al, 2021;Wang et al, 2020), Atlantic salmon (Gu et al, 2015), European seabass (Elkhayat et al, 2019), Pacific white shrimp (Yang et al, 2015) and Nile tilapia (Elbialy et al, 2020;Gaber, 2006;Njagi et al, 2017). In contrast, YS's dietary supplementation did not improve the FCR or growth of channel catfish (Tidwell et al, 1992).…”