Dietary inclusion of IMTA-cultivated Gracilaria vermiculophylla in rainbow trout (Oncorhynchus mykiss) diets: effects on growth, intestinal morphology, tissue pigmentation, and immunological response

Araújo, Mariana de; Rema, Paulo; Sousa-Pinto, Isabel; Cunha, Luís Miguel; Peixoto, Maria João; Pires, M.A.; Seixas, Fernanda; Brotas, Vanda; Beltrán, Carolina Aranda; Valente, Luísa

doi:10.1007/s10811-015-0591-8

Cited by 91 publications

(47 citation statements)

References 54 publications

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“…This confirms recent results in rainbow trout (Araújo et al, 2016) reporting significant reduction of intestine diameter and lower growth performance when 100 g/kg Gracilaria vermiculophylla was included in the diet. The overall histological appearance of rainbow trout sampled from all of the dietary treatments was normal with very few differences observed between the groups.…”

Section: Discussionsupporting

confidence: 91%

“…are a good source of biologically active phytochemicals including carotenoids (Norziah & Ching, 2000). The importance of seaweed as possible supplement or alternative protein sources for rainbow trout (Oncorhynchus mykiss) has been recently recognized (Araújo et al, 2016;Pereira, Valente, Sousa-Pinto, & Rema, 2012;Soler-vila, Coughlan, Guiry, & Kraan, 2009). Red seaweed are also an excellent source of polysaccharides like agar, carrageenan and alginates (Jung, Lim, Kim, & Park, 2013) that could provide physiological benefits to the fish acting as dietary immunostimulants (Castro, Zarra, & Lamas, 2004;Van Doan et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Antioxidant-related parameters, digestive enzyme activity and intestinal morphology in rainbow trout (Oncorhynchus mykiss) fry fed graded levels of red seaweed,Gracilaria pygmaea

Sotoudeh

Mardani

2017

Aquacult Nutr

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This study was conducted to investigate the effects of dietary red seaweed, Gracilaria pygmaea level on growth, antioxidant-related parameters, digestive enzyme activity and intestinal morphology of rainbow trout (Oncorhynchus mykiss) fry. Five isocaloric and isonitrogenous diets were formulated to contain four G. pygmaea levels (30 (GL-30), 60 (GL-60), 90 (GL-90) and 120 g/kg (GL-120)), and a control diet was used, without inclusion of seaweed. Results of the feeding trial indicated that final body (FBW: 2.8-3.5 g) and specific growth rate (SGR: 4.8-5.2) were significantly improved when 60 g/kg G. pygmaea was supplemented in the diets. However, there was a significant reduction (p < .05) of final body weight (FBW) and specific growth rate (SGR) in fish fed 120 g/kg G. pygmaea. Protease activity was significantly lower in fish fed GL-120 diet when compared to GL-30 or control (p < .05). Lipase was significantly affected by dietary seaweed regardless its level of supplementation (p < .05). The inclusion of the Gracilaria in the diet led to evident changes in the fish antioxidant status with significant reduction of superoxide dismutase, glutathione peroxidase activity and lipid peroxidation products.The histological study demonstrated that all groups of fish displayed normal morphology of anterior intestine and pyloric caeca. Villi absorptive area in the anterior intestine of treatment groups GL-90 and GL-120 significantly decreased (p < .05). Overall, the results obtained in this study indicate that dietary G. pygmaea supplementation up to 90 g/kg improves growth performance in rainbow trout fry without compromising antioxidant responses and digestive function. K E Y W O R D Santioxidant status, digestive enzyme, Gracilaria pygmaea, rainbow trout, seaweed

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Antioxidant-related parameters, digestive enzyme activity and intestinal morphology in rainbow trout (Oncorhynchus mykiss) fry fed graded levels of red seaweed,Gracilaria pygmaea

Sotoudeh

Mardani

2017

Aquacult Nutr

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“…Dietary inclusion of the brown algae Gracillaria sp. increased the serum peroxidase in rainbow trout (Araújo et al., ). Polysaccharide has been shown to be involved in the modulation of innate immunity (Schepetkin & Quinn, ) and hence an increase in the serum humoral non‐specific factors (Rodrı́guez, Cuesta, Ortuño, Esteban, & Meseguer, ).…”

Section: Discussionmentioning

confidence: 99%

Non-specific immunity and disease resistance are enhanced by the polysaccharide fraction of a marine chlorophycean macroalga inOreochromis niloticus(Linnaeus, 1758)

et al. 2018

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Summary Polysaccharides (PF) from marine macroalgae, Caulerpa scalpelliformis were extracted and tested for its potential immunostimulatory and disease resistance properties in fish. Five groups of Nile tilapia (n = 6), Oreochromis niloticus (Linnaeus, 1758) were intraperitoneally administered with the different doses of PF (2, 20 or 200 mg/kg body weight) or with yeast‐derived commercial immunostimulant, Macrogard™ (20 mg/kg body weight), to compare the effectiveness. An untreated control group was also maintained. A total of fifteen fibre reinforced plastic tanks (150 L, ambient temperature and light conditions) were used, with triplicate tanks for each group. Only four fish per tank (totally 12 fish from a group) were taken at random and assayed. PF enhanced all the tested non‐specific serum immune responses namely lysozyme, myeloperoxidase, antiprotease, and bactericidal activities. There was an upregulation of the genes encoding IL‐1β, lysozyme and TNF‐α in the spleen of PF injected fish as compared to the control group. In order to study the overall functional immunity, disease resistance test was conducted. Another five groups of fish (n = 10) were treated by intraperitoneal injection with different doses of PF or Macrogard™ or untreated as mentioned earlier in triplicates (30 fish per group in three tanks, totally 150 fish in 15 tanks). Seven days post treatment, fish were challenged by intraperitoneal administration of live virulent Aeromonas hydrophila. PF treated fish were protected with significant reduction in the mortality and the consequent increased relative percent survival (RPS) of 92 in the least (2 mg/kg) and middle dose (20 mg/kg) groups. The disease resistance experiment was repeated again but this time, fish were challenged 21 days post treatment that resulted in RPS of 50 for the middle dose. The results clearly show that the intraperitoneal administration of the polysaccharide fraction had a stimulating effect on the non‐specific immune responses, immune gene expression and disease resistance.

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“…Araújo et al (2015) have shown that the dietary inclusion of 10% Gracilaria sp. affects the gut morphology of rainbow trout.…”

Section: Discussionmentioning

confidence: 99%

Iodine enrichment of rainbow trout flesh by dietary supplementation with the red seaweed Gracilaria vermiculophylla

et al. 2015

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Dietary inclusion of IMTA-cultivated Gracilaria vermiculophylla in rainbow trout (Oncorhynchus mykiss) diets: effects on growth, intestinal morphology, tissue pigmentation, and immunological response

Cited by 91 publications

References 54 publications

Antioxidant-related parameters, digestive enzyme activity and intestinal morphology in rainbow trout (Oncorhynchus mykiss) fry fed graded levels of red seaweed,Gracilaria pygmaea

Antioxidant-related parameters, digestive enzyme activity and intestinal morphology in rainbow trout (Oncorhynchus mykiss) fry fed graded levels of red seaweed,Gracilaria pygmaea

Non-specific immunity and disease resistance are enhanced by the polysaccharide fraction of a marine chlorophycean macroalga inOreochromis niloticus(Linnaeus, 1758)

Iodine enrichment of rainbow trout flesh by dietary supplementation with the red seaweed Gracilaria vermiculophylla

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