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Effect of Lysine Addition on Growth of Black Iguana (Ctenosaura pectinata)
Authors:Juan José Ortiz Guzmán  Arcos‐García José Luis  Germán D. Mendoza Martínez  Fernando Xicoténcatl Plata Pérez  Gisela Fuentes Mascorro  Gabriela Ruelas Inzunza
Affiliation:1. Universidad Autónoma “Benito Juárez” de Oaxaca, Medicina Veterinaria, , Juquila, Oaxaca, México;2. Universidad del Mar, Campus Puerto Escondido, Puerto Escondido, , Juquila, Oaxaca, México;3. Universidad Autónoma Metropolitana, Departamento de Producción Agrícola y Animal, , Oaxaca, México City, México
Abstract:The effects of the addition of lysine to commercial feed given to captive black iguana (Ctenosaura pectinata) were evaluated in terms of growth and feed digestibility. Twenty‐eight‐day‐old black iguana with an initial weight of 5.5 ± 0.3 g were housed individually in cages measuring 45 × 45 × 45 cm. The experiment lasted 150 days. The ambient temperature ranged from 28 to 35°C with a relative humidity of 60 to 95%. Treatments consisted of the addition of different percentages of lysine to the feed (0.0, 0.1, 0.2, and 0.3%, dry matter [DM] base). There was a linear response (P < 0.01) in daily gain (68, 112, 118, and 151 mg/d) and daily intake (251, 289, 297, and 337 mg/d) for levels from 0 to 0.3%, respectively, as well in the growth in head size, snout–vent length, and total length. The digestibility of DM, neutral detergent fiber, and acid detergent fiber were reduced linearly (P < 0.01) as lysine levels increased. Intake and digestibility were negatively correlated (r = –0.74; P < 0.001). It is concluded that the addition of lysine to the black iguana diet in the first months of life is important to stimulate growth and intake. Zoo Biol 32:277–280, 2013. © 2012 Wiley Periodicals, Inc.
Keywords:Ctenosaura pectinata  lysine  growth  black iguana
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