Antioxidant enzyme activities and immune responses in rainbow trout (Onchorhynchus mykiss) juveniles fed diets supplemented with dandelion (Taraxacum officinalis) and lichen (Usnea barbata) extracts

Sönmez

et al. 2021

Aquaculture Research

Self Cite

The world animal protein consumption is increasing each year and it is estimated that annual fishery consumption will be 40 kg per capita in 2030, while it was 19.8 kg in 2013 (FAO, 2020). Based on this projection, especially after 2050, roughly 60% of animal protein need will most likely be met up by fishery products (FAO, 2017). Since production from capture fisheries is limited, aquaculture is expected to get importance more than ever.Aquaculture growth rate is elevated every year due to the introduction of new technologies (Bilen et al., 2013). However, there are some limiting factors in aquaculture, such as stress, diseases, feed supply, environmental pressure and ethics concerning animal welfare (Sönmez, 2017;Taştan & Salem, 2021;Vallejos-Vidal et al., 2016). In aquaculture systems, fish are invariably exposed to stress due to sudden temperature changes in water or handling for various purposes, such as vaccination, transportation and spawning induction (Naylor et al., 2000;Özçelik et al., 2020).There are various methods to prevent or treat diseases, such as vaccination, antibiotic treatment or use of other chemical agents (Corum et al., 2020;Salem et al., 2021;Terzi et al., 2020). Some of these substances have negative effects on the environment, fish health, or even

Section: Discussionmentioning

confidence: 41%

mentioning

confidence: 99%

See 1 more Smart Citation

Antioxidant and immunostimulant responses in rainbow trout (Oncorhynchus mykiss) fed with cherry stem extract

Amoush

Sönmez

et al. 2021

Aquaculture Research

Self Cite

“…supplementation enhances immune responses in this species without compromising growth performance. Similar results were observed in rainbow trout (Oncorhynchus mykiss) after being fed with dandelion and lichen(Salem et al 2021).Respiratory burst activity (RBA) is an important indicator to determine of the phagocytic cells' bacterial killing activity. RBA in sh fed high doses of the A. graveolens (AG0.01) showed a decrease on the 10th day of the study.…”

supporting

confidence: 65%

Investigation of growth performance and immune responses of European seabass (Dicentrarchus labrax) after treated with dietary celery (Apium graveolens) and resistance against Vibrio anguillarum

Güroy

et al. 2022

Preprint

In this study, we evaluated to reveal the effects of aqueous methanolic extract of celery (Apium graveolens) on the growth performance, immune responses and resistance against Vibrio anguillarum in European seabass (Dicentrarchus labrax). For this purpose, twenty fish (initial mean weight of 4.80 ± 0.06 g) were placed into twelve tanks (400 L) in triplicate and fish were fed with control (C) and three different levels (0.01, 0.05 and 0.1 g/kg) of celery extract-containing diets (AG0.01, AG0.05 and AG0.1) for 30 days. Blood and tissue (kidney, spleen and intestine) samples were taken from the fish every ten days of the study to determine the immune responses of the fish. Respiratory burst activity (RBA) was significantly decreased in the AG0.1 group compared to all other groups on the 10th day of the study. No differences in the RBA were observed on the 20th day among groups. Significantly increased RBA was noticed on the 30th day of the experiment in AG0.01 and AG0.05 compared to C group. Lysozyme activity (LYS) was raised on the 10th day of the study in all celery groups compared to C group. Final mean weight (FMW) was not affected in any experimental groups (P > 0.05). However, in the AG0.05 group, specific growth rate (SGR) increased, and feed conversion ratio (FCR) decreased compared to other groups (P < 0.05). IL-1β in the kidney was highly elevated in the AG0.01 group on the 20th day of the study. Similar results were observed on IL-6, IL-8 and TNF-α expression in the kidney. Anti-inflammatory responses (IL-10 and TGF-β) also increased in all experimental groups and tissues compared to C group. COX-2 was up-regulated on the 20th day of the study in all tissues. At the end of the feeding trial, the survival rate of the AG0.1 group in fish infected with Vibrio anguillarum infection was higher than the C group. Celery aqueous methanolic extract did not affect growth performance directly but increased innate immune responses and the high survival rate. These results demonstrate that celery extract could be used as an immunostimulant feed additive for European seabass at a feed dose of 0.05 g/kg and above.

“…In our study, LA increased on different sampling days in treatment groups. Some previous studies indicated that medicinal herbs and their bioactive compounds have positive effects on LA activity in rainbow trout (Salem et al, 2021;Lakwani et al, 2022). Haghighi et al (2014) reported that LA activity increased significantly in rainbow trout fry fed with 1%…”

Section: Discussionmentioning

confidence: 99%

Growth Promoter, Immunostimulant and Antioxidant for Rainbow Trout (Oncorhynchus mykiss): Terebinth (Pistacia terebinthus) Extract

ALİ¹,

Marine Science and Technology Bulletin

Güney

2022

Self Cite

In this study, the effects of Pistacia terebinthus (PT) fruit extract supplemented diet on growth performance, haematology, digestive and antioxidant enzyme activities, and non-specific immune responses were evaluated in juvenile rainbow trout (Onchoryhnchus mykiss). The fish were fed diets containing three doses of Pistacia terebinthus extract (0.1, 0.5 and 1% of diet) and a control diet without extract for 63 days. Final weight, weight gain and specific growth rate were significantly improved in all the treated groups. In addition, feed conversion ratio was significantly reduced in all PT diet fed groups. Pepsin and lipase activities were significantly increased in all the treated groups.Trypsin was significantly improved in PT 0.1% and PT 1% groups. Amylase was significantly increased in PT 0.5 and 1% groups. In haematological assays, red blood cell, haemoglobin, haematocrit, mean cell volume, mean cell haemoglobin, mean cell haemoglobin concentration values were not changed among all experimental groups. Superoxide dismutase, catalase, glutathione peroxidase and glucose-6-phosphate dehydrogenase activities were significantly improved in all the treatment groups. However, catalase activity decreased in PT 0.5% group at the end of 63 days. In addition, hepatic and white muscle lipid peroxidation activities were significant decreased in all the treated groups compared to the control. Non-specific immune parameters, such as nitroblue tetrazolium reduction, myeloperoxidase and lysozyme activities were increased in all the treated fish groups. These results indicated that extract of P. terebinthus can be used to improve fish health in aquaculture.