Studies about nuclear DNA content in the genus Genypterus are scarce, and the present study gives the first estimate of nuclear DNA content of Genypterus chilensis, with a value of 2C= 1.0 + 0.06 pg, value close to that obtained for other Ophidiidae species wich range between 1.2 and 1.68 pg.
Los estudios sobre contenido de ADN nuclear en el género Genypterus son escasos, y el presente trabajo entrega por primera vez la estimación del contenido de ADN nuclear de Genypterus chilensis con un valor 2C = 1,0 + 0,06 pg, valor cercano al descrito para otras especies de Ophidiidae que varían...
Jara-Seguel, Pedro
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Ubilla, Andrea
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Estrada, Juan
,
Ramírez, Diego
,
Valdebenito, Iván
,
[Contenido de ADN nuclear en el congrio colorado Genypterus chilensis (Guichenot, 1881) (Actinopterygii: Ophidiidae)]
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[Nuclear DNA content in the red conger eel Genypterus chilensis (Guichenot, 1881) (Actinopterygii: Ophidiidae)]
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Nuclear DNA content in the red conger eel Genypterus chilensis (Guichenot, 1881) (Actinopterygii: Ophidiidae)
RESUMEN. El congrio colorado Genypterus chilensis (Guichenot, 1848) es un pez altamente demandado por el mercado chileno. Las capturas han disminuido y mantenido bajo 1.000 ton anuales en la década 2000-2010 con un precio de US$7 kg-1. El objetivo de este trabajo fue evaluar el crecimiento de juv...
ABSTRACT. The cusk eel Genypterus chilensis (Guichenot, 1848) is a fish demanded by the Chilean market. Their catches have remained under 1,000 ton per year in the decade 2000-2010, at a price of US$7 kg-1. The aim of this study was to evaluate the growth of first generation juveniles produced by...
Vega, Rolando
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Estrada, Juan Manuel
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Ramírez, Diego
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Flores, Camila
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Zamorano, José
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Encina, Francisco
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Mardones, Alfonso
,
Valdebenito, Iván
,
Dantagnan, Patricio
,
[Growth of cusk eel Genypterus chilensis juveniles in culture conditions]
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[Crecimiento de juveniles de congrio colorado Genypterus chilensis en condiciones de cultivo]
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Crecimiento de juveniles de congrio colorado Genypterus chilensis en condiciones de cultivo
Actualmente la tendencia de la acuicultura mundial está orientada hacia la diversificación de los cultivos, principalmente de especies nativas. El congrio colorado Genypterus chilensis es un pez nativo de alta demanda gastronómica y explotación estacional que lo proyecta como candidato para el de...
The current trend in world aquaculture is towards the diversification of cultures, mainly native species. The red cusk eel Genypterus chilensis is a native Chilean species of high gastronomic demand and seasonal exploitation that is projected as a candidate for the development of farming technolo...
Vega, Rolando
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Pradenas, Miguel
,
Estrada, Juan Manuel
,
Ramírez, Diego
,
Valdebenito, Iván
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Mardones, Alfonso
,
Dantagnan, Patricio
,
Alfaro, Denis
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Encina, Francisco
,
Pichara, Cristian
,
[Evaluation and comparison of the efficiency of two incubation systems for Genypterus chilensis (Guichenot, 1848) eggs]
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[Evaluación y comparación de la eficiencia de dos sistemas de incubación de huevos de Genypterus chilensis (Guichenot, 1848)]
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Evaluación y comparación de la eficiencia de dos sistemas de incubación de huevos de Genypterus chilensis (Guichenot, 1848)
Sperm DNA quality and gene expression are crucial for early embryo development. Abnormal genomic processes can cause irreversible damage to totipotent cells, thereby altering the capacity for cell differentiation. Cryopreservation is a complex procedure that exposes cells to extreme conditions; i...
Figueroa, Elías
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Lee Estévez, Manuel
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Valdebenito, Iván
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Farías, Jorge G.
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Romero, Jaime
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[Potential biomarkers of DNA quality in cryopreserved fish sperm: impact on gene expression and embryonic development]
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Potential biomarkers of DNA quality in cryopreserved fish sperm: impact on gene expression and embryonic development
Semen conservation methods have been extensively studied for fish species over the last 60years. Cryopreservation techniques can be divided into two types: one with slow cooling rates like traditional freezing and the other with ultrarapid rates as used in vitrification. These protocols increase ...
Figueroa, Elías
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Farías, Jorge G.
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Lee-Estevez, Manuel
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Cerqueira, Vinicius
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Magnotti, Caio
,
Valdebenito, Iván
,
[Cryopreservation and vitrification of fish semen: a review with special emphasis on marine species]
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Cryopreservation and vitrification of fish semen: a review with special emphasis on marine species
In fish feeding studies, stomach related parameters are mainly measured in order to have biometric relationships. To determine those parameters a direct and straightforward method for measuring real maximum stomach volume in fish based on Archimedes' principle was tested and compared against a tr...
Salgado Ismodes, Andrés
,
Salgado Leu, Ítalo
,
Valdebenito, Iván
,
[A direct and straightforward method for measurement real maximum fish stomach volume to improve aquaculture feeding research]
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A direct and straightforward method for measurement real maximum fish stomach volume to improve aquaculture feeding research
In this research we evaluated simple aspects of the sperm biology of Genypterus blacodes, in particular assessing the effects of pH (6, 7, 8 and 9), temperature (4, 8 and 16 degrees C) and osmolalities 100% sea water (1010 mOsm/kg, Control), 75% sea water (774 mOsm/kg, T-1), 50% sea water (488 mO...
Dumorne, Kelly
,
Valdebenito, Iván
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Contreras, Pablo
,
Ulloa Rodríguez, Patricio
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Risopatrón, Jennie
,
Figueroa, Elías
,
Estévez, Manuel Lee
,
Díaz, Rommy
,
Farías, Jorge
,
[Effect of pH, osmolality and temperature on sperm motility of pink cusk-eel (Genypterus blacodes, (Forster, 1801))]
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Effect of pH, osmolality and temperature on sperm motility of pink cusk-eel (Genypterus blacodes, (Forster, 1801))
In this study, the morphology and ultrastructure of Genypterus blacodes spermatozoa were characterized through scanning and transmission electron microscopy. Findings revealed that the G. blacodes spermatozoa can be differentiated into three major parts: a spherical head without an acrosome (typi...
Durmone, Kelly
,
Valdebenito, Iván
,
Risopatron, Jennie
,
Figueroa, Elías
,
Díaz, Rommy
,
Farias, Jorge
,
[Morphology and ultrastructure of pink cusk-eel (Genypterus blacodes, Schneider 1801) spermatozoa by scanning and transmission electron microscopy]
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Morphology and ultrastructure of pink cusk-eel (Genypterus blacodes, Schneider 1801) spermatozoa by scanning and transmission electron microscopy
Sperm motility is considered as a key factor allowing determination of semen quality and predicts fertilizing capacity. In many fish species, the spermatozoa are immotile in the testes and seminal plasma, and motility is induced when they are released in the aqueous environment. Initiation and ac...