Growth Yield, Fatty Acid Profile and Antioxidant Status of Litopenaeus vannamei Fed Iyengaria stellata Supplemented Diet
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RESEARCH PAPER
Growth Yield, Fatty Acid Profile and Antioxidant Status of Litopenaeus vannamei Fed Iyengaria stellata Supplemented Diet Paria Akbary1 • Amin Gholamhosseini2 • Mohsen Ali2 • Zahra Aminikhoei3 • Kamran Rezaei Tavabe4 Bahare Samadi Kuchaksaraei5
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Received: 31 March 2020 / Accepted: 2 October 2020 Ó Shiraz University 2020
Abstract This study investigated the impact of the dietary supplementation of the water extract of algae Iyengaria stellata (IE) on the growth performance, fatty acid composition, antioxidant activity and disease resistance of shrimp Litopenaeus vannamei against Photobacterium damselae. A total number of 600 post larvae shrimp L. vannamei (mean 0.86 ± 0.01 g) were randomly divided into four groups (at three replications for each group). The control shrimp group (IE 0) was fed the basal diet free of supplemented IE. Other shrimp groups were fed the basal diet supplemented with IE at levels of 0.5 (IE 0.5), 1 (IE 1) and 1.5 (IE 1.5) g kg-1 diet. Upon the completion of eight weeks of feeding, the challenge test was carried out on 30 shrimps from each experimental group with SK7 strain of P. damselae. After 8 weeks of feeding trail, the shrimp taking IE1 at 1 and 1.5 levels showed a significantly better WG, SGR, PER, FW and PUFA compared to those fed IE 0 and IE 0.5 diets. Adding of IE I to experimental diet, led to significant difference (P \ 0.05) in the antioxidant activity. Shrimp fed an IE 1 containing diet, showed the highest PO, CAT, SOD and GPX in comparison with other groups. In addition, incorporation of IE 1 supplemented diet at three doses, significantly reduced mortality percentage following challenging shrimp against P. damselae. The results indicate the positive effect of water extract from brown algae I. stellata at 1 g kg-1 dose, on growth, PUFA and antioxidant activity of L. vannamei and also, showed a remarkable decrease in mortality after challenge with P. damselae. Keywords Litopenaeus vannamei Iyengaria stellata Immune response Challenge Bacterium Photobacterium damselae
& Paria Akbary [email protected] Kamran Rezaei Tavabe [email protected] 1
Department of Marine Sciences, Fisheries Groups, Chabahar Maritime University, Chabahar, Iran
2
Aquatic Animal Health Unit, School of Veterinary Medicine, Shirazu University, Shiraz, Iran
3
Agricultural Research Educations and Extension Organization (AREEO), Iranian Fisheries Science Research Institute (IFSRI), Offshore Fisheries Research Center, Chabahar, Iran
4
Aquaculture and Fisheries Department, Natural Resources Faculty, University of Tehran, Tehran, Iran
5
Marine Ecology, Department of Marine Science, Faculty of Natural Resources and Environment, Islamic Azad University, Science and Research Branch, Tehran, Iran
1 Introduction Universal production of cultivated penaeid shrimp has been regarded as one of the most important and growing aquaculture industries (FAO 2016), in which white shrimp, Litopenaeus vannamei is cultivated as the main species w
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