Estudo do comportamento alimentar do pepino do mar (Holothuria grisea), submetido a diferentes dietas e fotoperíodos.

• Ano de defesa: 2016
• Autor(a) principal: Santos, Fernando Luis Batista dos
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Palavras-chave em Português: Echinodermata; Aquicultura; Alimentação
• Link de acesso: http://www.repositorio.ufc.br/handle/riufc/21511

With the decline in sea cucumber fishing is extremely important investment in research on new species with potential for cultivation, such as Holothuria grisea. A better understanding of the power of this kind is an important step for the development of aquaculture of these animals. The aim of this study was to evaluate the selectivity and the feeding preference of juvenile H. grisea submitted to different diets and food animal behavior in relation to two different photoperiods. Initially there was selectivity and food preference to four diets with aquarium methodology "Y". The experimental diets were sieved sand and free of organic matter (control), muddy sediment, sand mixed with moist substrate fish and sand mixed with moist substrate of a zooplankton cultivation. Then the feeding behavior was observed under two different photoperiod, the natural (FN) and another 24 hours in the dark (24E). The variables analyzed in this phase were the number of animals grazing, number of animals defecating, number of protected animals (FN), number of animals moving and distance traveled by the animals. Besides these, they also analyzed the incident light and the temperature of the water. There was no statistically significant difference (p≥0.05) between the means of positive choices of diets, but there was a statistically significant difference ((p≤0.05) in the times of guidance and power start to the control diet and more sand substrate wet zooplankton cultivation, with choice and start faster power for the second diet. With respect to animals subjected to 24E, the feeding activity was constant and had negative correlation (r= -0.52; p≤0.05) with the water temperature, the period in which the temperature was lower food activity increased. In animals subjected to FN, the feeding activity was negatively correlated with temperature (r= -0.71; p≤0.05) and light intensity (r= -0.63; p≤0.05), ie, as they grew light intensity and temperature, the animals stopped feeding. H. grisea presented nocturnal eating habits, being strongly influenced by light intensity and temperature of the water, but showed no selectivity or food preference for any of the four diets tested.