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Development of digestive biochemistry in the initial stages of three cultured Atherinopsids
Authors:Elva Mayra Toledo‐Cuevas  Francisco J Moyano López  Dariel Tovar Ramírez  Carlos A Strüssmann  Carlos Alfonso Álvarez‐González  Carlos Cristian Martínez‐Chávez  Carlos A Martínez‐Palacios
Affiliation:1. Instituto de Investigaciones Agropecuarias y Forestales, UMSNH, San Juanito Itzícuaro, S/N Morelia, Michoacán, México;2. Departamento de Biología Aplicada, Escuela Politécnica Superior, Universidad de Almería, Almería, Spain;3. Centro de Investigaciones Biológicas del Noroeste (CIBNOR), La Paz, BCS México;4. Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Tokyo, Japan;5. División Académica de Ciencias Biológicas, Universidad Juárez Autónoma de Tabasco, Tabasco, México
Abstract:
The early development of the digestive biochemistry of three cultured Atherinopsids (two Odontesthes species and Chirostoma estor) was investigated. Relatively high lipolytic and high alkaline proteolytic activities were found in all species. In addition, gene expression of lipase and trypsin during the early development of C. estor not only indicates an early onset of the lipase activity but also demonstrates a major importance of protein digestion in this species. However, despite all of them share similar habitats, differences in their digestive activities were evident. The rise in the activities of brush border membrane enzymes correlated with the decrease in cytosolic activities, used as indicator of maturation of the digestive tract, was detected in both species of Odontesthes at 9 weeks after hatching. In contrast, no similar signs were measured in C. estor, this being in agreement to the long weaning period (nearly 5 months) reported for this species.
Keywords:Odontesthes spp.  Chirostoma estor  digestive enzymes  gut maturation  agastric fish
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