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Changes on physiological parameters of tambaqui (Colossoma macropomum) fed with diets supplemented with Amazonian fruit Camu camu (Myrciaria dubia)

Overview of attention for article published in Brazilian Journal of Biology, September 2017
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Title
Changes on physiological parameters of tambaqui (Colossoma macropomum) fed with diets supplemented with Amazonian fruit Camu camu (Myrciaria dubia)
Published in
Brazilian Journal of Biology, September 2017
DOI 10.1590/1519-6984.169442
Pubmed ID
Authors

Aride, P. H. R., Oliveira, A. M., Batista, R. B., Ferreira, M. S., Pantoja-Lima, J., Ladislau, D. S., Castro, P. D. S., Oliveira, A. T.

Abstract

The physiological responses of juvenile tambaqui (Colossoma macropomum) fed commercial feed supplemented with different concentrations of camu camu (Myrciaria dubia) were evaluated. The design was completely randomized, with treatments arranged in a factorial design with three proportions of camu camu (15%, 30% and 45%) and a control treatment (100% commercial diet), with four replicates per treatment. A total of 96 tambaqui specimens were used, with a mean initial weight of 11.69 ± 2.68 g and a mean length of 7.06 ± 0.44 cm. After 30 days, hematological parameters, metabolic variables, growth and fish swimming performance were evaluated. The different proportions of camu camu in the diet did not cause significant changes to the tambaqui's hematological parameters during the feeding period, except for hemoglobin (Hb) concentration and mean corpuscular hemoglobin concentration (MCHC) after the 30th day, and hematocrit (Ht) after the swimming stress test, which increased significantly (p < 0.05). The significant increases in metabolic variables, such as cortisol, glucose, proteins and triglycerides, and in hematologic variables after the Ucrit test reflect, respectively, biochemical adaptations for maintenance of the energy mobilization process and a regulatory necessity in tissue oxygen demand during intense exercise. Fish fed 15% and 30% camu camu gained the most weight and achieved the best swimming performance, respectively. The results for camu camu concentrations above 30% suggest a saturation of its intrinsic properties in the diet at this level and a loss of nutrients from the commercial feed replaced by the fruit, reducing productive performance and nutritional assimilation.

Mendeley readers

The data shown below were compiled from readership statistics for 29 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 29 100%

Demographic breakdown

Readers by professional status Count As %
Student > Master 9 31%
Student > Bachelor 3 10%
Student > Doctoral Student 2 7%
Professor > Associate Professor 2 7%
Student > Postgraduate 2 7%
Other 5 17%
Unknown 6 21%
Readers by discipline Count As %
Agricultural and Biological Sciences 6 21%
Medicine and Dentistry 3 10%
Sports and Recreations 2 7%
Environmental Science 2 7%
Chemistry 2 7%
Other 7 24%
Unknown 7 24%