The effects of monosex culture and stocking density on survival, growth and yield of redclaw crayfish (Cherax quadricarinatus) in earthen ponds

Rodgers, L. J.; Saoud, Patrick; Rouse, David B.

doi:10.1016/j.aquaculture.2005.11.056

Cited by 64 publications

(59 citation statements)

References 6 publications

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“…In C. quadricarinatus, males grow faster and reach a larger size at harvest than females in communal pond cultures, as well as in separate cells (Curtis and Jones 1995;Manor et al 2002Manor et al , 2004Rodgers et al 2006). Monosex culture in crustaceans involves handsexing of juveniles to sort males from females (Sagi et al 1986;Medley and Rouse 1993;Curtis and Jones 1995;Lawrence and Morrisy 1997;Rodgers et al 2006).…”

Section: Introductionmentioning

confidence: 97%

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Sex reversal and growth performance in juvenile females of the freshwater crayfish Cherax quadricarinatus (Parastacidae): effect of increasing temperature and androgenic gland extract in the diet

Bock

Greco

2009

Aquacult Int

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Monosex male culture of C. quadricarinatus is proposed for increasing yields because males reach a larger size at harvest than females. An experiment was done to evaluate the effects of androgenic gland extract and temperature on sex reversal and somatic growth in early juvenile females. Females were exposed to the following experimental conditions: C: control food and temperature maintained at 26 ± 1°C; HT (high temperature): control food and temperature maintained at 28.5 ± 1°C; VHT (very high temperature): control food and temperature maintained at 31 ± 1°C; AG: food with enriched with androgenic gland (1/10 dose for each juvenile per day) and temperature maintained at (26 ± 1)°C. The juveniles were weighed, sexed, and growth increment (GI) and growth rate (GR) were calculated twice a month. The HT and AG groups differed from the C group in GI and GR indicating a greater somatic growth. At the end of the experiment, the HT and AG groups had similar weight but only the HT group had enhanced oocyte diameter, with some vitellogenic oocytes compared to the C group. In the HT group, there was significant sex reversal, as indicated by development of male and intersex male characteristics in different individuals. Both temperature and AG diet have a high potential for culture of this species because of their enhancement of somatic growth; higher temperature increases the proportion of males, a desirable characteristic of cultured populations.

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Section: Introductionmentioning

confidence: 97%

“…Yields, growth and feed efficiencies current production systems need to be improved (Rodgers et al 2006;Pavasovic et al 2007). In monosex culture, energy from reproduction is diverted to growth, resulting in larger size of cultured individuals.…”

Section: Introductionmentioning

confidence: 99%

Sex reversal and growth performance in juvenile females of the freshwater crayfish Cherax quadricarinatus (Parastacidae): effect of increasing temperature and androgenic gland extract in the diet

Bock

Greco

2009

Aquacult Int

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“…Cherax quadricarinatus (von Martens, 1868), es una especie de agua dulce originaria de Australia y sur de Papua Nueva Guinea, considerada de elevado interés para la acuicultura, desde el inicio de la década del 90' (Edgerton, 2005;Rodgers et al, 2006;Ghanawi & Saoud, 2012), y con este objetivo ha sido introducida en países latinoamericanos como México, Cuba, Ecuador, Uruguay y Argentina (Luchini, 2004;Panné-Huidobro et al, 2004;Wicki et al, 2008).…”

Section: Introductionunclassified

“…Aún siendo una especie potencialmente importante, la mejora en el crecimiento es un aspecto clave para incrementar el rendimiento de su producción (Rodgers et al, 2006). Se han realizado numerosas investigaciones en esta especie, relacionadas con el crecimiento, principalmente referidas a la densidad de cultivo (Karplus & Barki, 2004;Naranjo-Páramo et al, 2004).…”

Section: Introductionunclassified

Influencia de la disposicion espacial y la superficie de refugios sobre la supervivencia y crecimiento de juveniles de Cherax quadricarinatus (Parastacidae) y su aplicacion al cultivo intensivo

Calvo

Tomás

Greco

2013

lajar

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RESUMEN.Cherax quadricarinatus es una especie de elevado interés para la acuicultura y de gran tolerancia a las altas densidades, lo que la hace propicia para el cultivo en sistemas intensivos. El objetivo de este trabajo es determinar el diseño más adecuado de disposición espacial y la superficie de "red cebollera", usualmente utilizada como refugio de juveniles en cultivo, que permita disminuir la mortalidad y mejorar el crecimiento en condiciones de alta densidad. Se realizaron dos experimentos, poniéndose a prueba la disposición espacial (redes paralelas en posición vertical, horizontal y sin ordenamiento) y la superficie de red cebollera (0,612 m 2 , 1,224 m 2 y 1,836 m 2 ) en cultivo con alta densidad de juveniles (41,7 juveniles de 1 g m -2 ). A los 60 días se registró el número y peso de juveniles, y se calculó la mortalidad y biomasa. En el segundo experimento se contabilizó también la cantidad de quelas faltantes y juveniles con todos sus apéndices, para estimar las interacciones agonísticas. La mortalidad resultó menor en el tratamiento sin ordenamiento y en el tratamiento con menor superficie de redes (P < 0,05). Por cada m 2 de fondo, 2,55 m 2 de red cebollera colocada en forma aleatoria sería suficiente como refugio para una densidad alta de juveniles. La biomasa y las interacciones agonísticas fueron similares en todos los casos. Se determinó que la colocación de la red al azar es la disposición más adecuada y económica para los juveniles de C. quadricarinatus, y que su exceso podría perjudicar la supervivencia en cultivo. Palabras clave: Cherax quadricarinatus, refugios, juveniles, supervivencia, cultivo intensivo.Influence of spatial distribution and shelter area upon survival and growth of Cherax quadricarinatus (Parastacidae) juveniles, and its application to intensive culture ABSTRACT. Cherax quadricarinatus is an interesting species for aquaculture and is more tolerant to high densities than other species of commercially important crustaceans, making it suitable for intensive culture. The purpose of this study is to determine the most adequate spatial arrangement and area of onion bag mesh, commonly used as shelter in juvenile culture, to decrease mortality and improve growth under high-density conditions. Two experiments were conducted to evaluate the optimum onion bag mesh spatial distribution (parallel pieces of mesh arranged in a vertical and horizontal position, and mesh with a random arrangement), and area (0.612 m 2 , 1.224 m 2 and 1.836 m 2 ) under high-juvenile density conditions (41.7 one-gram juveniles per m 2 ). The weight and number of juveniles were recorded, and mortality and biomass were calculated at day 60. In the second experiment, the number of missing chelae and juveniles with all their walking legs were counted to estimate agonistic interactions. Mortality was lower in the treatment consisting in randomly arranged onion bag mesh and that with the smallest area. A mesh surface of 2.55 m 2 per m 2 of ground would be sufficient as shelter for juveniles stocked at high dens...

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“…En la actualidad se cultiva en forma intensiva y semiintensiva en varios países incluyendo Australia, Estados Unidos, China, Ecuador, México y Argentina (Luchini, 2004;Rodgers et al, 2006).…”

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Influencia de la alimentacion sobre el ritmo circadiano de las enzimas digestivas en el cultivo de juveniles de la langosta de agua dulce Cherax quadricarinatus (Parastacidae)

Sacristán¹,

Franco-Tadic²,

Greco³

2013

lajar

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RESUMEN.Se analiza en juveniles en etapa de engorde (7 g) de Cherax quadricarinatus, el ritmo circadiano de los niveles de proteínas totales, la actividad de las proteasas, lipasas y amilasas, y su posible modificación en función del momento de alimentación matutino (8 h) y vespertino (17 h). En general, la actividad de las enzimas digestivas de los juveniles de C. quadricarinatus no mostró un patrón circadiano de secreción, a excepción de las lipasas, donde se observó un incremento de actividad hacia la tarde-noche y disminución hacia las primeras horas de la mañana. Los niveles de proteína total, la actividad de proteinasas y amilasas registradas en la glándula digestiva, permanecieron prácticamente inalterados en todos los experimentos. A pesar de ello, se observó tendencia a que los niveles de actividad de proteinasas disminuyan luego del pulso de alimentación, recuperando los niveles anteriores 3 h después, independientemente del horario de alimentación. En cambio la actividad de amilasa no mostró ninguna tendencia por efecto del horario de alimentación. El estudio de los patrones de secreción de las enzimas digestivas y sus posibles modificaciones, podría ser utilizado como una herramienta para establecer los momentos del día más propicios para la alimentación de los juveniles en cultivo. Palabras clave: enzimas digestivas, glándula digestiva, ritmo circadiano, langostas, juveniles, Cherax quadricarinatus. Influence of feeding on the circadian rhythm of digestive enzymes in cultivated juveniles of the freshwater crayfish Cherax quadricarinatus (Parastacidae)ABSTRACT. We analyze in juvenile Cherax quadricarinatus fattening stage, the circadian rhythm of total protein levels, activity of proteases, lipases and amylases, and their possible change as a function of morning (8 h) and evening (17 h) feeding. In general, the activity of digestive enzymes of juvenile C. quadricarinatus showed no circadian pattern of secretion of lipases except where there was an increase towards the evening-night and a decrease towards the early hours of the morning. The total protein levels, the activity of proteinases and amylases of juveniles of C. quadricarinatus registered in the midgut gland remained virtually unchanged in all experiments. However, a non-significant tendency to diminish the proteinase activity levels after the feeding pulse was observed, with a return to previous enzymatic levels after 3 h. In contrast, the amylase activity did not show an observable effect by the feeding schedule. The study of the patterns of the digestive enzyme secretion and their possible changes, could be used as a tool to establish the most favorable times of the day for juveniles feeding.

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The effects of monosex culture and stocking density on survival, growth and yield of redclaw crayfish (Cherax quadricarinatus) in earthen ponds

Cited by 64 publications

References 6 publications

Sex reversal and growth performance in juvenile females of the freshwater crayfish Cherax quadricarinatus (Parastacidae): effect of increasing temperature and androgenic gland extract in the diet

Sex reversal and growth performance in juvenile females of the freshwater crayfish Cherax quadricarinatus (Parastacidae): effect of increasing temperature and androgenic gland extract in the diet

Influencia de la disposicion espacial y la superficie de refugios sobre la supervivencia y crecimiento de juveniles de Cherax quadricarinatus (Parastacidae) y su aplicacion al cultivo intensivo

Influencia de la alimentacion sobre el ritmo circadiano de las enzimas digestivas en el cultivo de juveniles de la langosta de agua dulce Cherax quadricarinatus (Parastacidae)

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