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| Frías-Quintana,Carlos Alfonso; Peña-Marín,Emyr Saul; Ramírez-Custodio,Carlos David; Martínez-García,Rafael; Jiménez-Martínez,Luis Daniel; Camarillo-Coop,Susana; Guerrero-Zárate,Rocío; Asencio-Alcudia,Gloria Gertrudys; Álvarez-González,Carlos Alfonso. |
| ABSTRACT In the Southeast of Mexico, there are many native cichlids with commercial interest such as redhead cichlid (Vieja melanurus) and twoband cichlid (V. bifasciata), which have a great local demand and excellent meat quality. However, it is necessary to implement their culture based on nutrition studies and digestive biochemistry. This study’s objective was to characterize these two cichlids’ digestive proteases (pH, temperature, and inhibitors) through biochemistry techniques. Results showed that V. melanurus and V. bifasciata have a digestive capacity analogous to other omnivore fishes, where the optimal pH values of stomach proteases (4 and 2, respectively) and intestinal proteases (6 and 12, respectively), the optimal temperature of acid (35°C... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Inhibitors; PH; Proteases; Stability; Temperature. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000100210 |
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| Kubicek,Kole M.; Álvarez-González,Carlos Alfonso; Martínez-García,Rafael; Contreras-Sánchez,Wilfrido Miguel; Pohlenz,Camilo; Conway,Kevin W.. |
| ABSTRACT We document for the first time the early ontogeny of Centropomus poeyi based on captive raised material representing 0-19 days posthatch (dph). The achievement of early developmental landmarks (i.e., yolk-sac depletion, flexion, development of fins) and changes in pigmentation are described (1.4 mm NL-10.6 mm SL; 0-19 dph) and documented for a subset of individuals using high quality photographs. The ontogeny of the viscerocranium is also described (2.4 mm NL-10.6 mm SL; 6-19 dph). Development in C. poeyi occurs over a short period with attainment of the juvenile stage (i.e., full complement of fin rays present in each fin) occurring by 6.9 mm SL. The ontogeny of external pigmentation in C. poeyi is marked by two trends throughout growth: (1) a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquaculture; Morphology; Ontogeny; Perciformes; Viscerocranium. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000100204 |
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| Martínez-Cárdenas,Leonardo; Frías-Quintana,Carlos A.; Álvarez-González,Carlos A.; Jiménez-Martínez,Luis D.; Martínez-García,Rafael; Hernández-Almeida,Oscar U.; Bello-Pineda,Javier; Arellano-Méndez,Leonardo U.; Ponce-Palafox,Jesús T.. |
| ABSTRACT Short-tailed pipe fish (Microphis brachyurus) is a freshwater organism with high economic potential for the aquarium hobby, so it is necessary to implement methods to promote its culture through studies of digestive physiology. General activities of acid and alkaline proteases were evaluated, as well as the effect of pH, temperature and inhibitors. The optimal pH of stomach proteases was 2, while the optimal pH of intestinal proteases was 10. Optimal temperature for the acidic proteases was 35 ºC, while for alkaline proteases it was 45 ºC. Thermal stability showed high resistance at 35 ºC for both acid and alkaline proteases (above 100% residual activity). Acid proteases are resistant at pH 2 (50% of residual activity), meanwhile alkaline... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Enzyme activity; Sygnathidae; PH; Protease inhibitors; Temperature. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000200212 |
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