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Respuesta metabólica de la alimentación natural y artificial en juveniles de la langosta espinosa Panulirus argus (Latreille, 1804)

2002; Universidad Autónoma Metropolitana; Volume: 12; Issue: 2 Linguagem: Espanhol

2448-7333

Eugenio Díaz-Iglesias, Marysabel Báez-Hidalgo, Erick Perera, Ileana Fraga Castro,

Aquaculture Nutrition and Growth

Con el objeto de evaluar la respuesta metabolica y el efecto calorigenico de la alimentacion natural y artificial en juveniles de la langosta espinosa, Panulirus argus, se efectuaron experimentos en un respirometro dinamico cuyas camaras funcionaron como jaulas metabolicas acuaticas, permitiendo la determinacion del consumo de oxigeno y la excrecion amoniacal durante el ayuno y la alimentacion. Se calcularon los indices bioenergeticos, incremento de calor aparente (ICA), excrecion postalimentaria (UPA) y la razon atomica 0:N. Los alimentos estudiados fueron los moluscos: lima Lima scabra, quiton Acanthopleura granuliata, y litorina Littor ina mespillum; el erizo negro Echinometra iucunter, el cangrejo Plagussia depressa; y dos alimentos balanceados isocaloricos que contienen 25 y 45% de proteina. A los alimentos balanceados, al quiton y al erizo se les hizo analisis bromatologico. Durante las 6 horas de experimentacion, para las langostas alimentadas con quiton A. granullata, el V0 2 /W aumento a 2.4 veces el valor del ayuno, o sea, 2454 joules kg -1 bh · h -1 , mientras que el U/W tomo un valor 2.9 veces mayor, equivalente a 632 joules kg -1 bh · h -1 . La razon atomica 0:N disminuyo a 12.9, indicando el catabolismo de proteinas. Se comparan los resultados entre si, observandose que no en todos los casos se utilizan las proteinas como sustrato energetico, sobre todo en aquellas especies en que esten bien representados los lipidos. Se analizan elementos que permiten afirmar la carnivoria estricta de esta especie. With the objective of evaluating the metabolic response and the calorigenic effect of the natural and artificial feeding in spiny lobster Panulirus argus juveniles, experiments were made in a dynamic respirometer where cameras worked as aquatic metabolic cages, allowing the determination of the oxygen consumption and the ammonia excretion during the fast and the feeding. The bioenergetics index was calculated, apparent heat increment (PPNE ) postpandrial nitrogen excretion (PPNE) and the atomic ration O:N. The studied foods were the mollusks, Lima scabra, chiton Acanthopleura granuliata, and sea snail Littor ina mespillunr, the black sea urchin Echinometra Iucunter, the crab Plagussia depressa; and two isocaloric foods that contain 25 and 45 protein. To the artificial foods, the chiton and the sea urchin a bromathologic analysis was carried out. During the 6 hours of experimentation, for the chiton A. granullata, the V02/W increased to 2.4 times the value of the fast. which represents 21454 joules kg - 1bh·h -1 . while the U/W took a value 2.9 times higher, equivalent to 632 joules kg - 1bh·h -1 . The ratio 0:N diminished at 12.9, indicating the catabolism of proteins. Results are compared with the following observation not in all the cases, the proteins are used as an energy substrate, mainly in those species in which the lipids are well represented. Elements are analyzed in order to confirm the sirict carnivory of this species.