... 373 ROBERTO MENDOZA, CARLOS AGUILERA ... alimen-ticio de los lepisosteidos, el cual consiste ... more ... 373 ROBERTO MENDOZA, CARLOS AGUILERA ... alimen-ticio de los lepisosteidos, el cual consiste en per-manecer inmóviles en la superficie del agua hasta que la presa se encuentra a su alcance y con un movimiento lateral de la cabeza atraparla súbita-mente ...
Mendoza, R., C. Aguilera y J. Montemayor. 2000. Utilización de subproductos avícolas en las dieta... more Mendoza, R., C. Aguilera y J. Montemayor. 2000. Utilización de subproductos avícolas en las dietas para organismos acuáticos. pp 398-439 En: Civera-Cerecedo, R., Pérez-Estrada, CJ, Ricque-Marie, D. y Cruz-Suárez, LE (Eds.) Avances en Nutrición Acuícola IV. Memorias ...
... Silva Francisco J. García de León David Lazcano Villarreal Maricela Martínez Jiménez ... more ... Silva Francisco J. García de León David Lazcano Villarreal Maricela Martínez Jiménez María Esther Meave del Castillo Rodrigo A. Medellín Edna Naranjo García María Teresa Olivera Carrasco Mayra Pérez Sandi Gabino Rodríguez Almaraz Guillermo Salgado ...
This paper describes the strategy utilized for the domestication of the alligator gar (Atractoste... more This paper describes the strategy utilized for the domestication of the alligator gar (Atractosteus spatula), highlighting different aspects of larval development and the weaning of larvae onto artificial diets. Developmental stages based on nutritional characteristics were established. Lecithotrophic stage was observed between 1–4 days after hatching (DAH) larvae, lecithoexotrophic stage between 5–8 DAH larvae and the exotrophic stage initiates in 9 DAH larvae. The degree of development for alligator gar larvae could be differentiated by snout length. In addition, pigmentation could be easily used to separate individuals in poor condition. Growth rate of alligator gar larvae was 1.55 mm/day during the first 10 DAH and 5.6 mm/day thereafter until 15 DAH. RIA analyses showed that T3 levels are low during embryonic development, but increase after hatching, until 10 DAH, decreasing thereafter. The effect of thyroidian hormones and goitrogens on larval development was evaluated. Snout l...
When an exotic species becomes invasive, the consequences are generally negative; however, some p... more When an exotic species becomes invasive, the consequences are generally negative; however, some positive effects are also possible. In this paper we explore the consequences of the introduction of fish from the Loricariidae family (loricariids) in Mexico. We analyze these effects in three areas: fishing activities, natural capital and the aquarium trade. The results of our analysis indicate that loricariids have negative effects on natural capital and on fishing activities, but positive effects on the aquarium trade—specifically the generation of profits. In summary, the impact from the introduction of loricariids translates into losses of nearly US $16.5 million annually.
The nutritional efficiency of the semi moist product "Squid Custard" was evaluated as a... more The nutritional efficiency of the semi moist product "Squid Custard" was evaluated as a supplement and/or nutritional complement for larvae of the prawn Macrobrachium rosenbergii, from the V life stage onwards. The feed was prepared with fresh squid and chicken egg (38.8% crude protein and 16.4% total lipids) as protein sources. Three experimental diets with three replicates were tested in a completely random design with a density of 50 larvae/L (2500 larvae/experimental unit). The treatments were: A1: recently hatched Artemia sp nauplii; A2: 50% Artemia sp nauplii and 50% squid custard; A3: only squid custard. The larvae were fed twice daily (8:00 and 14:00). The experimental system consisted of nine circular plastic tanks (62 L), in an open culture system with a salinity of 14 ± 2 g L1, a temperature of 29 ± 0.5 °C and a photoperiod of 12:12 L:D. The first postlarvae were observed after 23 d of culture in the A2 treatment, while in treatments A1 and A3 they were observe...
... 373 ROBERTO MENDOZA, CARLOS AGUILERA ... alimen-ticio de los lepisosteidos, el cual consiste ... more ... 373 ROBERTO MENDOZA, CARLOS AGUILERA ... alimen-ticio de los lepisosteidos, el cual consiste en per-manecer inmóviles en la superficie del agua hasta que la presa se encuentra a su alcance y con un movimiento lateral de la cabeza atraparla súbita-mente ...
Mendoza, R., C. Aguilera y J. Montemayor. 2000. Utilización de subproductos avícolas en las dieta... more Mendoza, R., C. Aguilera y J. Montemayor. 2000. Utilización de subproductos avícolas en las dietas para organismos acuáticos. pp 398-439 En: Civera-Cerecedo, R., Pérez-Estrada, CJ, Ricque-Marie, D. y Cruz-Suárez, LE (Eds.) Avances en Nutrición Acuícola IV. Memorias ...
... Silva Francisco J. García de León David Lazcano Villarreal Maricela Martínez Jiménez ... more ... Silva Francisco J. García de León David Lazcano Villarreal Maricela Martínez Jiménez María Esther Meave del Castillo Rodrigo A. Medellín Edna Naranjo García María Teresa Olivera Carrasco Mayra Pérez Sandi Gabino Rodríguez Almaraz Guillermo Salgado ...
This paper describes the strategy utilized for the domestication of the alligator gar (Atractoste... more This paper describes the strategy utilized for the domestication of the alligator gar (Atractosteus spatula), highlighting different aspects of larval development and the weaning of larvae onto artificial diets. Developmental stages based on nutritional characteristics were established. Lecithotrophic stage was observed between 1–4 days after hatching (DAH) larvae, lecithoexotrophic stage between 5–8 DAH larvae and the exotrophic stage initiates in 9 DAH larvae. The degree of development for alligator gar larvae could be differentiated by snout length. In addition, pigmentation could be easily used to separate individuals in poor condition. Growth rate of alligator gar larvae was 1.55 mm/day during the first 10 DAH and 5.6 mm/day thereafter until 15 DAH. RIA analyses showed that T3 levels are low during embryonic development, but increase after hatching, until 10 DAH, decreasing thereafter. The effect of thyroidian hormones and goitrogens on larval development was evaluated. Snout l...
When an exotic species becomes invasive, the consequences are generally negative; however, some p... more When an exotic species becomes invasive, the consequences are generally negative; however, some positive effects are also possible. In this paper we explore the consequences of the introduction of fish from the Loricariidae family (loricariids) in Mexico. We analyze these effects in three areas: fishing activities, natural capital and the aquarium trade. The results of our analysis indicate that loricariids have negative effects on natural capital and on fishing activities, but positive effects on the aquarium trade—specifically the generation of profits. In summary, the impact from the introduction of loricariids translates into losses of nearly US $16.5 million annually.
The nutritional efficiency of the semi moist product "Squid Custard" was evaluated as a... more The nutritional efficiency of the semi moist product "Squid Custard" was evaluated as a supplement and/or nutritional complement for larvae of the prawn Macrobrachium rosenbergii, from the V life stage onwards. The feed was prepared with fresh squid and chicken egg (38.8% crude protein and 16.4% total lipids) as protein sources. Three experimental diets with three replicates were tested in a completely random design with a density of 50 larvae/L (2500 larvae/experimental unit). The treatments were: A1: recently hatched Artemia sp nauplii; A2: 50% Artemia sp nauplii and 50% squid custard; A3: only squid custard. The larvae were fed twice daily (8:00 and 14:00). The experimental system consisted of nine circular plastic tanks (62 L), in an open culture system with a salinity of 14 ± 2 g L1, a temperature of 29 ± 0.5 °C and a photoperiod of 12:12 L:D. The first postlarvae were observed after 23 d of culture in the A2 treatment, while in treatments A1 and A3 they were observe...
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Papers by Roberto Mendoza