Temporal relationships of postmolt deposition of calcium, magnesium, chitin and protein in the cuticle of the atlantic blue crab, Callinectes sapidus Rathbun

Feeding of the spider crab Maja squinado in rocky subtidal areas of the Ría de Arousa (north-west Spain)

“…The quantitative changes associated with maturity in the crabs appear to be related to the demand for certain nutrients required during the intermoult phase, since ecdysis implies a strong need for calcium and other materials to form the new exoskeleton. The use of calcium from the diet in the process of calci¢cation has been reported for other species of decapods (Vigh & Dendinger, 1982;Sarda¨& Cros, 1984). Juveniles carry out frequent ecdyses, thus, the need to build up calcium reserves may imply a greater consumption of gastropods and other prey having a high content of calcium carbon-ate.…”

Feeding of the spider crab Maja squinado in rocky subtidal areas of the Ría de Arousa (north-west Spain)

“…The quantitative changes associated with maturity in the crabs appear to be related to the demand for certain nutrients required during the intermoult phase, since ecdysis implies a strong need for calcium and other materials to form the new exoskeleton. The use of calcium from the diet in the process of calci¢cation has been reported for other species of decapods (Vigh & Dendinger, 1982;Sarda¨& Cros, 1984). Juveniles carry out frequent ecdyses, thus, the need to build up calcium reserves may imply a greater consumption of gastropods and other prey having a high content of calcium carbon-ate.…”

Proximate composition and mineral contents of the blue crab (Callinectes sapidus) breast meat, claw meat and hepatopancreas

“…Ca and Na were deposited in the meats and hepatopancreas of the blue crab, because the samples used here were adult crabs. Vigh & Dendinger (1982) reported that there was a decrease in Ca concentrations from 0 to 3 days postmoult, probably because mineral was rapidly deposited in cuticle, with a gradual return to normal postmoult values, and Ca quickly returned to normal values.…”

Post-molt processes of cuticle formation and calcification in the Japanese mitten crab Eriocheir japonicus

“…On the other hand, the process of post-molt calcification in the exoskeleton was relatively slow compared with other crustaceans. Previous quantitative time-series studies have shown that the calcification process can be divided into two phases [6][7][8][9][10][11][12][13]. In the first phase, both the absolute amount and the concentration of calcium in the exoskeleton increases rapidly, whereas in the second phase, the absolute amount increases gradually concomitant with synthesis of the endocuticle matrix.…”

Feeding of the spider crab Maja squinado in rocky subtidal areas of the Ría de Arousa (north-west Spain)

“…The quantitative changes associated with maturity in the crabs appear to be related to the demand for certain nutrients required during the intermoult phase, since ecdysis implies a strong need for calcium and other materials to form the new exoskeleton. The use of calcium from the diet in the process of calci¢cation has been reported for other species of decapods (Vigh & Dendinger, 1982;Sarda¨& Cros, 1984). Juveniles carry out frequent ecdyses, thus, the need to build up calcium reserves may imply a greater consumption of gastropods and other prey having a high content of calcium carbon-ate.…”

Proximate composition and mineral contents of the blue crab (Callinectes sapidus) breast meat, claw meat and hepatopancreas

“…Ca and Na were deposited in the meats and hepatopancreas of the blue crab, because the samples used here were adult crabs. Vigh & Dendinger (1982) reported that there was a decrease in Ca concentrations from 0 to 3 days postmoult, probably because mineral was rapidly deposited in cuticle, with a gradual return to normal postmoult values, and Ca quickly returned to normal values.…”

Post-molt processes of cuticle formation and calcification in the Japanese mitten crab Eriocheir japonicus

“…On the other hand, the process of post-molt calcification in the exoskeleton was relatively slow compared with other crustaceans. Previous quantitative time-series studies have shown that the calcification process can be divided into two phases [6][7][8][9][10][11][12][13]. In the first phase, both the absolute amount and the concentration of calcium in the exoskeleton increases rapidly, whereas in the second phase, the absolute amount increases gradually concomitant with synthesis of the endocuticle matrix.…”

Feeding of the spider crab Maja squinado in rocky subtidal areas of the Ría de Arousa (north-west Spain)

“…The quantitative changes associated with maturity in the crabs appear to be related to the demand for certain nutrients required during the intermoult phase, since ecdysis implies a strong need for calcium and other materials to form the new exoskeleton. The use of calcium from the diet in the process of calci¢cation has been reported for other species of decapods (Vigh & Dendinger, 1982;Sarda¨& Cros, 1984). Juveniles carry out frequent ecdyses, thus, the need to build up calcium reserves may imply a greater consumption of gastropods and other prey having a high content of calcium carbon-ate.…”

Proximate composition and mineral contents of the blue crab (Callinectes sapidus) breast meat, claw meat and hepatopancreas

“…Ca and Na were deposited in the meats and hepatopancreas of the blue crab, because the samples used here were adult crabs. Vigh & Dendinger (1982) reported that there was a decrease in Ca concentrations from 0 to 3 days postmoult, probably because mineral was rapidly deposited in cuticle, with a gradual return to normal postmoult values, and Ca quickly returned to normal values.…”

Post-molt processes of cuticle formation and calcification in the Japanese mitten crab Eriocheir japonicus

“…On the other hand, the process of post-molt calcification in the exoskeleton was relatively slow compared with other crustaceans. Previous quantitative time-series studies have shown that the calcification process can be divided into two phases [6][7][8][9][10][11][12][13]. In the first phase, both the absolute amount and the concentration of calcium in the exoskeleton increases rapidly, whereas in the second phase, the absolute amount increases gradually concomitant with synthesis of the endocuticle matrix.…”