Molting, reproductive biology, and hatchery management of redclaw crayfish Cherax quadricarinatus (von Martens 1868)

Ghanawi, Joly; Saoud, I. Patrick

doi:10.1016/j.aquaculture.2012.06.019

Cited by 75 publications

(44 citation statements)

References 109 publications

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“…Cherax quadricarinatus is a gonochoristic species that exhibits sexually dimorphic growth, with larger males and smaller females (Ghanawi & Saoud, 2012). Rodgers et al (2006) reported larger male sizes compared with female sizes in a unisex culture at different stocking densities, and recommended this type of culture to obtain a greater biomass.…”

Section: Introductionmentioning

confidence: 99%

Comparative morphometrics and relative growth of Cherax quadricarinatus (Von Martens, 1868) males and females

Rodríguez

Alvarez

Ibáñez

2014

Crustac

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The relative growth of Cherax quadricarinatus (Von Martens, 1868) males and females under laboratory conditions was analysed using eight somatic measurements. The allometry of each measurement was estimated in relation to total length. The morphometrics were analysed using the original values, as well as normalized data from each group. Two multivariate analyses were carried out: reciprocal averaging and principal components. The results showed that the two sexes have a similar relative growth. However, differences between the sexes were recorded with respect to shape, though not to size. This was observed through the reciprocal averaging analysis after normalization of the individuals in each group. The morphometric variables that differentiated the sexes were the width and length of the chela, followed by the length of the abdomen. Thus, this analysis was useful to determine the shape differences between the sexes in culture. RESUMENSe analizó el crecimiento relativo de los machos y hembras de Cherax quadricarinatus (Von Martens, 1868) bajo condiciones de cultivo utilizando ocho medidas somáticas. Se estimó la alometría de cada medida en relación con la longitud total. El análisis morfométrico se realizó usando los valores originales de los datos, así como llevando a cabo una normalización para cada sexo. Se utilizaron dos análisis multivaridos: análisis de correspondencias y de componentes principales. Los resultados mostraron que los dos sexos poseen crecimiento relativo similar. Sin embargo, se observaron diferencias entre los sexos con respecto a la forma de la quela y la longitud del abdomen. Así, este análisis fue útil para identificar diferencias entre la forma de los sexos en organismos sometidos a cultivo.) Corresponding

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Section: Introductionmentioning

confidence: 99%

Comparative morphometrics and relative growth of Cherax quadricarinatus (Von Martens, 1868) males and females

Rodríguez

Alvarez

Ibáñez

2014

Crustac

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“…The similarity of VIH, GIH with that of MIH confers the involvement of induction of molting at previtellogenic stage in C. quadricarinatus [43].…”

Section: Role Of Vitellogenesis/gonad Inhibiting Hormone (Vih) On Molmentioning

confidence: 99%

Crustacean Molting: Regulation and Effects of Environmental Toxicants

Hosamani¹,

B²,

P³

2017

J Marine Sci Res Dev

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In crustaceans the growth of the animal occurs by shedding of old exoskeleton and formation of new exoskeleton. Immediately after ecdysis the newly synthesized cuticle up takes water to expand new exoskeleton thereby size. Molt cycle in crustaceans is under the control of several regulatory hormones, internal and external factors. The predominant hormones molt inhibiting hormone (MIH) and ecdysteroids act in a controversy manner to one another in regulation of molt. It is also identified that the methyl farnesoate (MF) induces molting by inducing the synthesis and release of ecdysteroids from Y-organs. Besides several other hormones and internal molecules like opioids and neurotransmitters along with toxicants (xenobiotics, chemicals and metals) are also involved in the regulation of crustacean molting. Toxicity of aquatic pollutants leads to retardation of growth and delays molting, besides influence mortality and causes huge loss to crustacean farming. This review presents the advances in the field of crustacean molting and its regulation.

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“…Several crustaceans mobilize protein under stressful situations such as starvation (Sánchez Paz et al, 2006). In C. quadricarinatus, both protein and lipids have been identified as the main energy reserves for either growth or reproduction (Ghanawi & Saoud, 2012).…”

Section: Discussionmentioning

confidence: 99%

Effects of both ecdysone and the acclimation to low temperature, on growth and metabolic rate of juvenile freshwater crayfish Cherax quadricarinatus (Decapoda, Parastacidae)

Chaulet

Vatnick

Rodríguez

2013

Iheringia, Sér. Zool.

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ABSTRACT. Growth, metabolic rate, and energy reserves of Cherax quadricarinatus (von Martens, 1868) juveniles were evaluated in crayfish acclimated for 16 weeks to either 25°C (temperature near optimum) or 20°C (marginal for the species). Additionally, the modulating effect of ecdsyone on acclimation was studied. After 12 weeks of exposure, weight gain of both experimental groups acclimated to 25°C (control: C25, and ecdysone treated: E25) was significantly higher than that of those groups acclimated to 20°C (C20 and E20). A total compensation in metabolic rate was seen after acclimation from 25°C to 20°C; for both the control group and the group treated with ecdysone. A Q 10 value significantly higher was only observed in the group acclimated to 20°C and treated with ecdysone. A reduction of glycogen reserves in both hepatopancreas and muscle, as well as a lower protein content in muscle, was seen in both groups acclimated to 20°C. Correspondingly, glycemia was always higher in these groups. Increased lipid levels were seen in the hepatopancreas of animals acclimated to 20°C, while a higher lipid level was also observed in muscle at 20°C, but only in ecdysone-treated crayfish. KEYWORDS.Energy reserves, growth, metabolic rate, Q 10 .RESUMEN. Efectos de ecdisona y de la aclimatación a baja temperatura, sobre el crecimiento y la tasa metabólica de juveniles de la langosta de agua dulce Cherax quadricarinatus (Decapoda, Parastacidae). Se evaluaron las reservas energéticas, el crecimiento y la tasa metabólica de langostas juveniles de agua dulce Cherax quadricarinatus (von Martens, 1868), aclimatadas durante 16 semanas tanto a 25°C (temperatura cercana al óptimo) como a 20°C (temperatura marginal para la especie). Adicionalmente, se evaluó el efecto modulador de la ecdisona sobre la aclimatación. Luego de 12 semanas de exposición, la ganancia en peso de ambos grupos experimentales aclimatados a 25°C (control: C25, y tratados con ecdisona: E25) fue significativamente mayor que la de los grupos aclimatados a 20°C (C20 and E20). Se verificó una compensación total en la tasa metabólica, luego de la aclimatación desde 25 a 20°C, tanto para el grupo control como para el tratado con ecdisona. Solamente se observó un valor de Q 10 significativamente mayor en el grupo aclimatado a 20°C y tratado con ecdisona. En ambos grupos aclimatados a 20°C, se determinó un reducción en la reservas de glucógeno, tanto en hepatopancreas como en músculo, así como un menor contenido de proteína en músculo. Correspondiente, la glucemia resultó siempre más elevada en esos grupos, que también mostraron un mayor nivel de lípidos en el hepatopancreas, siendo mayor el nivel de lípidos en músculo sólo para los juveniles aclimatados a 20°C y tratados con ecdisona. PALABRAS-CLAVE.Reservas energéticas, crecimiento, tasa metabólica, Q 10 .Metabolic rate of invertebrates depends on several intrinsic and extrinsic factors. Intrinsic factors include: age, gender, weight, degree of locomotor activity and internal work. Extrinsic factors include: ambient te...

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Molting, reproductive biology, and hatchery management of redclaw crayfish Cherax quadricarinatus (von Martens 1868)

Cited by 75 publications

References 109 publications

Comparative morphometrics and relative growth of Cherax quadricarinatus (Von Martens, 1868) males and females

Comparative morphometrics and relative growth of Cherax quadricarinatus (Von Martens, 1868) males and females

Crustacean Molting: Regulation and Effects of Environmental Toxicants

Effects of both ecdysone and the acclimation to low temperature, on growth and metabolic rate of juvenile freshwater crayfish Cherax quadricarinatus (Decapoda, Parastacidae)

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