Metabolic effects of eyestalk removal in the crab Varuna litterata (Fabricius)

Madhyastha, M. N.; Rangneker, P. V.

doi:10.1007/bf00033487

Cited by 11 publications

(3 citation statements)

References 12 publications

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“…The 140% increase in the glycogen concentration in the digestive glands that took place 2 h after feeding could indicate the onset of glucogen synthesis (Tables I and IV). Hormones from the eyestalks could also be responsible for the metabolic control of the digestive gland in living animals (Silverthorn, 1975a, b;Kleinholz, 1976;Madyastha and Rangneker, 1976;Mauviot and Castell, 1976;Radakrishnan and Vijakumaran, 1984;Rosas et al, 1991). In fact, a 56% increase in oxygen consumption was recorded in the digestive gland of P. setiferus after 6 h (Table I).…”

Section: Discussionmentioning

confidence: 99%

Role of Digestive Gland in the Energetic Metabolism of Penaeus setiferus

Rosas

Bolongaro-Crevenna

Sánchez

et al. 1995

The Biological Bulletin

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We determined the role of the digestive gland in the respiratory metabolism of Penaeus setiferus adult males as a step toward proposing a feeding schedule based on the cycle of activity in the digestive gland. We measured pre- and postprandial values for oxygen consumption rate and hemolymph glucose concentrations in live animals, and oxygen consumption rate and glycogen concentration in excised digestive gland. After the animals were fed, which enhanced general metabolic activity, these indices changed. There was a high correlation between the oxygen consumption rate of the animal and the glucose concentration in the hemolymph, and between the oxygen consumption rate by the digestive gland and the glycogen concentration in the digestive gland, all in relation to time after feeding. Correlations support the hypothesis that the energy demand depends upon the metabolic substrate concentration. In this theory, glucose sustains muscle activity (during ingestion of food) and glycogen is the product of the digestive gland during food assimilation. Our observations of metabolic dynamics during the feeding period allowed us to examine the feeding process. The metabolic activity of the digestive gland was highest 6 h after feeding. This could mean that assimilation, having started 2 h after food intake, peaked 6 h after feeding. Eight hours after feeding, the oxygen consumption rate of the digestive gland decreased and fell to values similar to those recorded for animals subjected to 72 h of fasting.

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Section: Discussionmentioning

confidence: 99%

Role of Digestive Gland in the Energetic Metabolism of Penaeus setiferus

Rosas

Bolongaro-Crevenna

Sánchez

et al. 1995

The Biological Bulletin

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“…The ablation of P. urgus lobster (Diaz-Iglesia et al, 1987) Vurunu fitterutu crab (Madhyastha and Rangneker, 1976) and H. umericunus lobster (Mauviot and Castell, 1976) eyestalks caused a decrease of glycogen and an increase of lipids in the hepatopancrease, muscle glycogen, oxygen consumption and growth of the animals. Sochasky et al (1973) andCaste11 et al (1976) also demonstrated that the nutritional status of the diet may play an important role in growth and survival of the ablated lobsters.…”

Section: Discussionmentioning

confidence: 99%

The effect of eyestalk ablation on growth, haemolymph composition and gill Na+, K+-ATPase activity of Penaeus monodon juveniles

Nan

Sheen

Liu

et al. 1993

Comparative Biochemistry and Physiology Part A: Physiology

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“…Freshly dissected meat was weighed and used for analyses. Protein, carbohydrate and lipid contents were analyzed adopting standard methods (Lowry et al, 1951;Dubois et al, 1956;Folch et al, 1957;Frings et al, 1972;Johnston and Davies, 1972).…”

Section: Methodsmentioning

confidence: 99%

Impact of unilateral eyestalk ablation on major biochemical parameters of muscle of the freshwater crab Travancoriana schirnerae Bott, 1969 (Decapoda: Gecarcinucidae)

Padmanabhan¹,

Raghavan²

2016

Braz. J. Biol. Sci.

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The current study examined the moultwise impact of unilateral eyestalk ablation on major biochemical parameters of the muscle of the freshwater crab Travancoriana schirnerae Bott, 1969 (Decapoda: Gecarcinucidae). Meat from unilaterally destalked crabs 15 days post-operation was analyzed for protein, oligosaccharide, polysaccharide, total free amino acid, total lipid, cholesterol and moisture content following standard procedures. The results indicated a moultwise cycling of the major biochemical parameters of the muscle. Unilateral eyestalk ablation induced a rise in all the major biochemical parameters except moisture, irrespective of the moult stages. The alteration induced as an impact of unilateral destalkation in the biochemical parameters decide the suitability of this technique to enhance meat quality as practiced in aquaculture farms of marine decapods.

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Metabolic effects of eyestalk removal in the crab Varuna litterata (Fabricius)

Cited by 11 publications

References 12 publications

Role of Digestive Gland in the Energetic Metabolism of Penaeus setiferus

Role of Digestive Gland in the Energetic Metabolism of Penaeus setiferus

The effect of eyestalk ablation on growth, haemolymph composition and gill Na+, K+-ATPase activity of Penaeus monodon juveniles

Impact of unilateral eyestalk ablation on major biochemical parameters of muscle of the freshwater crab Travancoriana schirnerae Bott, 1969 (Decapoda: Gecarcinucidae)

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