Developments in the nutrition of Menidia estor Jordan 1880
| Autor: | Professor Lindsay G Ross, Carlos Antonio Martínez Palacios, Carlos Cristian Martínez-Chávez, Jorge Fonseca-Madrigal, María Gisela Ríos-Durán, Laboratorio Nacional de Nutrigenómica y Microbiómica Digestiva Animal Universidad Michoacana de San Nicolás de Hidalgo, Elva Mayra Toledo-Cuevas |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Aquaculture Research. 39:738-747 |
| ISSN: | 1365-2109 1355-557X |
| DOI: | 10.1111/j.1365-2109.2008.01926.x |
| Popis: | The Mexican silverside, Menidia estor, is a species with great regional importance and with very high prices in local markets. Unfortunately, due to high ¢sheries pressure, environmental degradation and pollution, the species has become endangered. Recently, there has been much progress in the biotechnology of this species, aimed at its culture, and the present paper describes the advances in feeding and nutrition of those important ¢sh. M. estor is a stomachless, zooplantophagous ¢sh, which also occasionally feeds on small ¢sh and crustaceans in the adult stage. Studies on the digestive enzymatic activities show high proteolytic capacity and a late or diierent model of digestive maturation from that described for marine stomach ¢sh. Nutritional studies on M. estor have shown that juveniles have dietary requirements of about 400 g kg 1 protein and 80 mg kg 1 vitamin C. The upper level of dietary carbohydrate for good growth and survival for juveniles is about 150 g kg 1 . Based on the high docosahexaenoic acid (DHA) content in £esh when fed on diets low in DHA, it is believed that the species has the capacity to biosynthetize420-carbon fatty acids from 18-carbon fatty acids. The high levels of DHA in £esh makes this ¢sh a very signi¢cant potential component of human nutrition. Using these ¢ndings the ¢rst practical diets for commercial culture of the species have been developed. |
| Databáze: | OpenAIRE |
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