Social relationship as inducer of immunological and stress responses in matrinxã (Brycon amazonicus)

Ferraz, Francielle Bonet; Gomes, Levy Carvalho

doi:10.1016/j.cbpa.2009.03.002

Cited by 15 publications

(11 citation statements)

References 17 publications

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“…). Similarly, Ferraz & Gomes () observed that social subordination decreased the percentage of thrombocytes and lymphocytes, while neutrophil values were augmented in matrinxã ( Brycon amazonicus ). Plasma ACP levels also increased in handled specimens regardless of dietary treatment.…”

Section: Discussionmentioning

confidence: 78%

Dietary arginine supplementation decreases plasma cortisol levels and modulates immune mechanisms in chronically stressed turbot (Scophthalmus maximus)

et al. 2013

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Repeated handling was employed in this study as a chronic stressor to verify whether its attributed immunosuppressive effects could be minimized by dietary arginine supplementation. Therefore, turbot (Scophthalmus maximus) were air-exposed for 3 min (mild hypoxia) every other day during 15 or 60 days (handled) or left undisturbed (control). In addition, control and handled specimens were fed one of three diets with graded levels of arginine (6, 7 and 11 g 16 g À1 N; Arg 6, Arg 7 and Arg 11, respectively). Repeated handling increased plasma cortisol levels in handled fish fed the Arg 6 diet when compared with control groups, while those levels decreased in handled fish fed Arg 7 and Arg 11 diets after both 15 and 60 days. Moreover, repeated handling stress decreased nitric oxide production, lysozyme activity and peripheral lymphocyte numbers after 15 days, while more profound effects were observed after 60 days. Furthermore, circulating monocytes, nitric oxide production and humoral parameters increased in both control and handled fish fed arginine supplements. In conclusion, dietary arginine supplementation may present valuable effects in chronically stressed turbot by decreasing plasma cortisol levels and enhancing most aspects of the innate immune mechanisms assessed after 60 days.

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Section: Discussionmentioning

confidence: 78%

Dietary arginine supplementation decreases plasma cortisol levels and modulates immune mechanisms in chronically stressed turbot (Scophthalmus maximus)

et al. 2013

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“…Indeed, Souza et al (2014) observed reduced locomotor activity in B. amazonicus at times when aggressive behavior was less frequent. The greater aggressiveness observed at 72 HAH can be related to the search for protection of a suitable habitat, foraging, predator avoidance, or territory defense, as B. amazonicus displays territorial behavior (Ferraz and Gomes 2009).…”

Section: Discussionmentioning

confidence: 99%

Effect of body size heterogeneity on the aggressive behavior of larvae of matrinxã, Brycon amazonicus (Characiformes, Bryconidae)

2018

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Brycon amazonicus is a native Amazonian fish that is important for aquaculture in South America. Larval mortality is high in this species in intensive breeding systems due to aggressiveness among larvae. The present study investigated experimentally the effects of body size heterogeneity on the aggressive behavior and survival of B. amazonicus during the early stages of larval development. Two treatments (larvae groups with homogeneous and heterogeneous body size) were evaluated throughout early larval stages tested at six time points: 12, 24, 36, 48, 60 and 72 hours after hatching (HAH). Two experiments quantified, respectively, aggressive interactions and mortality rates among larvae at each time point. The frequency of aggressive interactions exhibited by the less aggressive larvae in each replicate was higher in the homogeneous size treatment. Aggressiveness was higher at 12 HAH, decreasing thereafter, and increasing again at 72 HAH. The mortality rate significantly increased with the larval stage, and was higher in the homogeneous than in the heterogeneous sized groups. Our results showed that aggressiveness in B. amazonicus larvae is affected by size variability and larval development stage. This knowledge about larval behavior is important to develop measures to improve larval health and survival in intensive production systems for this species.

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“…However, as a result of the Brazilian aquaculture development and the intensive fish farming, there are several stressful situations, such as the capture, transport, confinement, changes in water quality among others which promote immunosuppression and diseases outbreaks (Urbinati et al, 2010;Zanuzzo et al, 2015). Conversely, little is known about the immune system of matrinxã (Ferraz and Gomes, 2009;Zanuzzo et al, 2012;Zanuzzo et al, 2015), and to our knowledge this is the first study evaluating the immunostimulant effect of the levamisole in matrinxã. The current study was conducted to search the effects of dietary levamisole on the innate immunity and hematological and biochemical variables of matrinxã.…”

Section: Introductionmentioning

confidence: 98%

“…The matrinxã, Brycon amazonicus, is a fish of great economic interest due to its simple reproduction and excellent growth performance (Ferraz and Gomes, 2009;Tavares-Dias et al, 2008b). However, as a result of the Brazilian aquaculture development and the intensive fish farming, there are several stressful situations, such as the capture, transport, confinement, changes in water quality among others which promote immunosuppression and diseases outbreaks (Urbinati et al, 2010;Zanuzzo et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

LEVAMISOLE MODULATES THE CELL-MEDIATED IMMUNITY OF MATRINXí, Brycon amazonicus

et al. 2019

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The use of immunomodulators is an alternative to improve the immune system of fish and avoid the excessive use of antibiotics. Levamisole is a synthetic anthelmintic which promotes a potent immunostimulation on innate and acquired variables of fish. In order to access the levamisole effects on matrinxã, Brycon amazonicus, fish were fed levamisole at 500 mg kg-1 of diet for seven days. After this period fish were submitted to blood collection. Immunological variables, such as leukocytes respiratory burst, total serum protein, albumin, globulin, albumin:globulin index and hematological variables, such as hematocrit, hemoglobin, red and white blood cell (WBC) and Wintrobe indexes were evaluated. The levamisole administration increased the WBC counts indicating that the immunostimulant modulates the cell-mediated immunity. The increased WBC indicate that the fish fed levamisole were in a better body condition, and probable more resistant to disease due to potential for phagocytosis activation, degranulation of neutrophilic granules, and consequently production of antibodies and immunological memory. Besides, these findings are important for news projects regarding the production of vaccines and deeper understanding of fish cell-mediated immunity.

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Social relationship as inducer of immunological and stress responses in matrinxã (Brycon amazonicus)

Cited by 15 publications

References 17 publications

Dietary arginine supplementation decreases plasma cortisol levels and modulates immune mechanisms in chronically stressed turbot (Scophthalmus maximus)

Dietary arginine supplementation decreases plasma cortisol levels and modulates immune mechanisms in chronically stressed turbot (Scophthalmus maximus)

Effect of body size heterogeneity on the aggressive behavior of larvae of matrinxã, Brycon amazonicus (Characiformes, Bryconidae)

LEVAMISOLE MODULATES THE CELL-MEDIATED IMMUNITY OF MATRINXí, Brycon amazonicus

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