Induction of ovarian growth in the red claw crayfish,Cherax quadricarinatus, by the enkephalinergic antagonist naloxone:in vivoandin vitrostudies

Cahansky, Alejandra Valeria; Medesani, Daniel A.; Rodríguez, Enrique M.

doi:10.1080/07924259.2008.9652256

Cited by 10 publications

(9 citation statements)

References 13 publications

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“…Naloxone has been previously reported to enhance reproductive indices in crustaceans [21], [22], [30] and our work extends this finding to insects. Because naloxone is an opioid antagonist, we expected that it would negate the effect of both enkephalins when co-administered.…”

Section: Discussionsupporting

confidence: 87%

“…Similarly, Tang and Collins [32] reported the enhancement of analgesic action of morphine following chronic administration of naloxone in rats. The mode of action for naloxone in R. microptera is unknown; however naloxone has been reported to stimulate the action of gonad stimulating hormone (GSH) in the red claw crayfish [22]. Further studies are needed to determine the mode of action of naloxone and the mechanism of its interaction with enkephalins in insects.…”

Section: Discussionmentioning

confidence: 99%

“…For example, Cahansky et al . [22] reported an increase in lipid concentration associated with reproductive growth in the ovaries of the cockroach crayfish Aegla platanis after ingestion of naloxone containing food. Recently, naloxone has been found to bind with retinoid X receptors (RXR) [23], which are associated with reproduction [24], suggesting that naloxone may also play a role in reproductive physiology in crustaceans and vertebrates.…”

Section: Introductionmentioning

confidence: 99%

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Exposure to Exogenous Enkephalins Disrupts Reproductive Development in the Eastern Lubber Grasshopper, Romalea microptera (Insecta: Orthoptera)

et al. 2012

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Enkephalins play a major role in reproductive physiology in crustaceans; however their role in reproductive development in insects is largely unknown. We investigated the effect of exposure to exogenous leucine-enkephalin (Leu-Enk), methionine-enkephalin (Met-Enk), and the opioid antagonist naloxone on gonad development in the Eastern lubber grasshopper, Romalea microptera. Injection of either Leu-Enk or naloxone alone significantly increased the testicular index and testicular follicular diameter in males, and the ovarian index, oocyte length, and oocyte diameter in females. In contrast, injection of Met-Enk inhibited all measures of reproductive development in both sexes. Surprisingly, co-injection of naloxone with either enkephalin enhanced the effect associated with administration of the enkephalin alone. This study clearly demonstrates the ability of enkephalins to disrupt insect sexual development and also suggests the existence of conserved enkephaline-dependent regulatory mechanisms in insects and crustaceans.

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Section: Discussionsupporting

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Exposure to Exogenous Enkephalins Disrupts Reproductive Development in the Eastern Lubber Grasshopper, Romalea microptera (Insecta: Orthoptera)

et al. 2012

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“…The water in all aquaria was changed twice a week. Every day, all animals were fed ad libitum with commercial pellets (Tetra Diskus Ò , 40% of protein), used in previous studies with C. quadricarinatus (Cahansky et al 2008). Dissolved oxygen (Digital Oxygen Meter, precision of ±0.4 mg/l), pH (Jenco Model 6350, precision of ±0.01), ammonia (Wiener Ò kit), total hardness (as CaCO 3 ), alkalinity and nitrite levels (both measured with Acuanalítica Ò kit) were determined in each aquaria at the beginning and at the end of the experiment before changing water and feeding the animals.…”

Section: Evaluation Of the Substrate Typementioning

confidence: 99%

Substrate selection and effect of different substrates on survival and growth of juveniles of the freshwater crayfish Cherax quadricarinatus (von Martens 1868) (Decapoda, Parastacidae)

Viau

Rodríguez

2009

Aquacult Int

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Survival and growth of juveniles of the Australian freshwater crayfish Cherax quadricarinatus were evaluated in aquaria with four different substrates covering their bottom. The four substrates were plastic mesh, small stones, fine sand and bare glass without cover (control group). Two size classes of juveniles were evaluated: recently hatched or early (*0.02 g of body weight) and pre-fattening or advanced (*1 g of body weight). A group of twelve early or ten advanced juveniles were placed in each of the 24 aquaria. Each substrate had a total of six aquaria, three containing early juveniles and the other three containing advanced juveniles groups. Each aquarium had an excess small PVC pipes that served as shelters. After 12 weeks, early juveniles raised in small stones or fine sand had a statistically significant heavier body mass than the control group while the advanced juveniles did not show statistically significant differences in body weight. In a second experiment, ten early and ten advanced juveniles were individually placed in a circular glass aquarium divided into four sections each containing one of the same substrates used in the first experiment. Each individual was filmed for 24 h, and the time spent in each compartment was registered. Both sizes of juveniles showed a marked preference for the small stones. This experiment was repeated with animals used in the first experiment and observed the same selection pattern indicating that substrate selection is independent of body mass or previous acclimation to the different substrates.

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“…It was introduced in Mexico in the 90´s [3] and is mainly cultured in the northeast region. Research studies have been conducted with the species, such as nutrition [4][5][6], reproduction and embryonic development [7][8][9][10], growth [11] and technology development for commercial culture [12]. Nevertheless, to optimize development during culture it is necessary to know and explore the limits of the physiological response of the organism under varying conditions.…”

Section: Introductionmentioning

confidence: 99%

Growth, Metabolic and Physiological Response of Juvenile Cheraxquadricarinatus Fed Different Available Nutritional Substrates

Carreño-León

Racotta

Casillas-Hernández

et al. 2014

J Aquac Res Development

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There are many factors in intensive culture conditions which vary the physiological response of organisms in culture affecting performance such as growth, metabolic levels in blood, respiratory metabolism and the inflection point of dissolved oxygen concentration. The study was conducted under high density culture conditions with multitrophic systems. Results show that the species can tolerate intensive culture conditions without affecting their growth and survival and has the ability to leverage multiple food sources. This work also shows that Cheraxquadricarinatus has the ability to maintain a low routine metabolic rate, is highly tolerant to limited dissolved oxygen conditions and thus uses energy efficiently. The metabolic rate in juvenile C. quadricarinatus was 0.07 ± 0.003 mg O 2 /g/h while the critical level of oxygenconcentration, when the organism passes from regulator to conformer is 0.483 ± 0.002 mg O 2 /L. This is significantly lower than previously reported for cultured decapod species.

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Induction of ovarian growth in the red claw crayfish,Cherax quadricarinatus, by the enkephalinergic antagonist naloxone:in vivoandin vitrostudies

Cited by 10 publications

References 13 publications

Exposure to Exogenous Enkephalins Disrupts Reproductive Development in the Eastern Lubber Grasshopper, Romalea microptera (Insecta: Orthoptera)

Exposure to Exogenous Enkephalins Disrupts Reproductive Development in the Eastern Lubber Grasshopper, Romalea microptera (Insecta: Orthoptera)

Substrate selection and effect of different substrates on survival and growth of juveniles of the freshwater crayfish Cherax quadricarinatus (von Martens 1868) (Decapoda, Parastacidae)

Growth, Metabolic and Physiological Response of Juvenile Cheraxquadricarinatus Fed Different Available Nutritional Substrates

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