Cultivation of juvenile Colossoma macropomum in different colored tanks in recirculating aquaculture system (RAS): Effects on performance, metabolism and skin pigmentation

Boaventura, Túlio Pacheco; Pedras, Pedro Paulo Cortezzi; Santos, Fábio Aremil Costa dos; Ferreira, Andre Lima; Favero, Gisele Cristina; Palheta, Glauber David Almeida; Melo, Nuno Filipe Alves Correia de; Luz, Ronald Kennedy

doi:10.1016/j.aquaculture.2020.736079

Cited by 9 publications

(2 citation statements)

References 41 publications

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“…In addition, Lima and Ludke (2011) found that the inclusion of different levels of mango meal bran in the diet of Nile tilapia (O. niloticus) did not modify HSI, reinforcing the viability of using silage produced with fish and vegetables residues in a fish farm. The LSI value of tambaqui fed a diet with 5% silage inclusion for 45 days was lower and indicates that these animals did not accumulate perivisceral fat, possibly due to a greater energy use (Boaventura et al, 2021). Moreover, feeding for 90 days the LSI of the tambaqui increase significantly, indicating that the animals adapted to the feeding management conditions.…”

Section: Discussionmentioning

confidence: 91%

Physiological responses of tambaqui (Colossoma macropomum) fed diets supplemented with silage from fish and vegetables residues

et al. 2024

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The demand for products to replace high-cost raw materials, such oil and fish meal, in the manufacture of feed for use in aquaculture, while also guaranteeing the nutritional quality of the diets, is increasing. Silage produced with fish and vegetables residues is a low-cost and efficient protein source. The objective of the present study was to evaluate the physiological and biochemical responses of tambaqui fingerlings fed four different levels of silage included in commercial feed with 28% crude protein, over two periods: 45 and 90 days. Each treatment was carried out over three replications, with 10 tambaqui in each 100 L experimental tank. At the end of each established period, blood samples were collected from five animals from each repetition to determine the hematological and biochemical variables. Body weight and total length, hepatosomatic and liposomal indices and hematocrit of specimens fed with diets supplemented with silage did not exhibit significant changes in both assessment period. After 45 days of feeding, the hemoglobin concentration increased when tambaqui were fed a diet including 20% silage. The red blood cell count, mean corpuscular volume and mean corpuscular hemoglobin did not change between treatments in either period. The total protein concentrations increased significantly in the plasma of tambaqui fed with diets with the inclusion of 5 and 10% of silage, evaluated after feeding for 45 days. It was found that the groups which had silage included in their diet did not exhibit significant alterations in the evaluated parameters, and the diet was therefore not consider harmful to the health of tambaqui. Therefore, the use of silage as a feed supplement during tambaqui farming is a sustainable alternative for producers, as it leads to a reduction of impacts of fish and vegetables waste disposal.

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Section: Discussionmentioning

confidence: 91%

Physiological responses of tambaqui (Colossoma macropomum) fed diets supplemented with silage from fish and vegetables residues

et al. 2024

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“…In Oryzias latipes , the density of chromatic nerve fibers changes along with changes in the number of melanophores during prolonged background adaptation; melanophore size decreases first, followed by a decrease in the density of melanophores caused by gradual cell death on a white background [ 13 , 14 ]. Oreochromis niloticus exhibits a high cortisol level when maintained on blue and brown backgrounds [ 15 ], and fish reared on a black background are distinctively darker than those reared on a white, blue, or clear background [ 16 , 17 , 18 ]. Furthermore, the background color could influence the capture of food and consumption, and consequently, the growth of the fish [ 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Background Color on Skin Color Variation of Juvenile Plectropomus leopardus

Song

Shi

Yao

et al. 2022

Animals

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Fish skin color is usually strongly affected by the background color of their environment. The study investigated the effects of five different background colors on the skin color of leopard coral groupers (Plectropomus leopardus). More than 450 juveniles were reared in Blue, Red, Black, White, and Transparent background tanks for 56 days. The paraffin section showed that the skin melanin zone of fish in the White group was smaller, whereas the Black and Red groups (especially Black) were nearly the largest. The apparent skin color of P. leopardus was red on the white background, which darkened in response to the other color backgrounds. The Black group revealed the blackest skin color, followed by the transparent group. Moreover, the White group had the highest L*, a*, and b* values. The melanin content and tyrosinase activity in the dorsal and ventral skin of the Black group were significantly higher than those in the other groups (p < 0.05), and the serum α-MSH level was higher in the Black group as well. The carotenoid and lutein contents showed completely different trends among the experimental groups, as carotenoid content was higher in the Red and White groups, while lutein content was higher in the Transparent group. The expression level of scarb1 was highest in the Blue and White groups, followed by the Transparent group, and lowest in the Black group (p < 0.05). The expression trend of scarb1 was similar to the skin color in different backgrounds, indicating that the background color regulated scarb1 expression level through visual center, then influenced the uptake and transport of carotenoids, then influenced the skin color formation of P. leopardus. Moreover, lighter colors inhibited the formation of melanocytes and had a significant effect on carotenoid and lutein contents. Pigment-related genes were involved in the regulation of fish skin color, and they were affected by background color in P. leopardus. These results indicate that a white background is more conducive to maintaining red skin color in juvenile P. leopardus.

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Effects of tank color on the growth, survival rate, stress response, and skin color of juvenile hybrid catfish (Clarias macrocephalus × Clarias gariepinus)

2022

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Cultivation of juvenile Colossoma macropomum in different colored tanks in recirculating aquaculture system (RAS): Effects on performance, metabolism and skin pigmentation

Cited by 9 publications

References 41 publications

Physiological responses of tambaqui (Colossoma macropomum) fed diets supplemented with silage from fish and vegetables residues

Physiological responses of tambaqui (Colossoma macropomum) fed diets supplemented with silage from fish and vegetables residues

The Effect of Background Color on Skin Color Variation of Juvenile Plectropomus leopardus

Effects of tank color on the growth, survival rate, stress response, and skin color of juvenile hybrid catfish (Clarias macrocephalus × Clarias gariepinus)

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