Larvicultura de piabanha-do-pardo em aquários de cores diferentes

Abstract

Resumo -O objetivo deste trabalho foi avaliar o efeito de diferentes cores de aquários na larvicultura da piabanha-do-pardo (Brycon sp.). Os tratamentos consistiram na utilização de aquários de cores claras (branca, verde e azul) e escuras (marrom e preta). Ao final do experimento, foram mensurados a sobrevivência, o peso, o comprimento total e a coloração das larvas, que foram comparados pelo teste de Tukey, a 5% de probabilidade. A sobrevivência foi menor (66,25%), com maior taxa de canibalismo (17,08%), no aquário de cor azul, quando comparado ao aquário de cor marrom (84,17%), com baixa taxa de canibalismo (6,25%). O comprimento total, o peso e a mortalidade não diferiram entre os tratamentos. A coloração das larvas escureceu progressivamente dos aquários mais claros para os mais escuros, o que interferiu no canibalismo e na sobrevivência. O aquário marrom promove maior valor de sobrevivência e menor taxa de canibalismo nas larvas de piabanha-do-pardo.Termos para indexação: Brycon, canibalismo, coloração, mortalidade, pigmentação. Larviculture of piabanha-do-pardo in aquariums of different colorsAbstract -The objective of this work was to evaluate the effect of different colors of aquariums on the larviculture of piabanha-do-pardo (Brycon sp.). The treatments consisted of the use of light-(white, green, and blue) and dark-(brown and black) colored aquariums. At the end of the experiment, survival, weight, total length, and color of the larvae were measured and compared by the Tukey test, at 5% probability. Survival was lower (66.25%), with a higher rate of cannibalism (17.08%), in the blue-colored aquarium when compared to the brown-colored one (84.17%), with a low rate of cannibalism (6.25%). Total length, weight, and mortality did not differ among treatments. The color of the larvae gradually darkened from the lighter to the darker aquariums, which interfered with cannibalism and survival. The brown aquarium promotes a greater survival value and a lower rate of cannibalism in larvae of piabanha-do-pardo.

The effect of environmental colour on the growth, metabolism, physiology and skin pigmentation of the carnivorous freshwater catfish Lophiosilurus alexandri

“…A similar reduction of L * in dark environments and an increased L * in white environments have been recorded for P. pagrus (Van der Salm et al ., ; Pavlidis et al ., ), P. auratus (Doolan et al ., , , ) and Brycon sp. (Costa et al ., ). According to Sugimoto et al .…”

“…For Salvelinus alpinus (L. 1758) (Höglund et al ., ), Diplodus sargus (L. 1758) (Karakatsouli et al ., ), Brycon sp. (Costa et al ., ) and Oreochromis niloticus (L. 1758) (Opiyo et al ., ), different colour tanks affected agonistic interactions that in turn affected survival. Although L .…”

“…For Salvelinus alpinus (L. 1758) (Höglund et al, 2002), Diplodus sargus (L. 1758) (Karakatsouli et al, 2007b), Brycon sp. (Costa et al, 2013) and Oreochromis niloticus (L. 1758) (Opiyo et al, 2014), different colour tanks affected agonistic interactions that in turn affected survival. Although L. alexandri is a carnivore, after being conditioned to formula food, adverse agonistic interactions do not occur, regardless of tank colour.…”

“…A similar reduction of L* in dark environments and an increased L* in white environments have been recorded for P. pagrus (Van der Salm et al, 2004;Pavlidis et al, 2008), P. auratus (Doolan et al, 2007(Doolan et al, , 2008(Doolan et al, , 2009 and Brycon sp. (Costa et al, 2013). According to Sugimoto et al (2000), the long-term adaptation to a background induced morphological colour changes in fish skin and resulted in a change in the density and morphology of pigment cells.…”

Combination of diet and water salinity in larviculture of piabanha-do-Pardo ( Brycon vonoi , Lima 2017)

“…All of these results were within the limits observed in larviculture of piabanha-do-Pardo Brycon sp. (Coraspe-Amaral et al, 2012;Costa et al, 2013) and of other Brycon (Pedreira, 2003;Pedreira et al, 2006;Pedreira et al, 2008b). Yet the electric conductivity of water (Figure 2) increased as water salinity was raised, due to increased ions release caused by salt, as observed by Camargo et al (2006).…”