Changes in oxygen consumption of the american lobster, homarus american us, during the molt cycle

Impacts of Endogenous Factors and Ontogenetic Stages on the Metabolic Rate of the Mediterranean Spider Crab Maja squinado (Herbst, 1788)

“…Postmolt individuals (stages A, B) have a much lower metabolic rate than intermolt or premolt animals (stages C and D, respectively). This is consistent with data obtained on the American lobster, Homarus americanus ( Penkoff and Thurberg 1982 ). Locomotor and feeding activities significantly decrease or even cease during molting in crustaceans, remain low in postmolt animals, and only begin to increase again at stage B2 or C1, reaching their maximum during intermolt ( Lipcius and Herrnkind 1982 ; O'Halloran and O'Dor 1988 ).…”

Impacts of Endogenous Factors and Ontogenetic Stages on the Metabolic Rate of the Mediterranean Spider Crab Maja squinado (Herbst, 1788)

“…Postmolt individuals (stages A, B) have a much lower metabolic rate than intermolt or premolt animals (stages C and D, respectively). This is consistent with data obtained on the American lobster, Homarus americanus ( Penkoff and Thurberg 1982 ). Locomotor and feeding activities significantly decrease or even cease during molting in crustaceans, remain low in postmolt animals, and only begin to increase again at stage B2 or C1, reaching their maximum during intermolt ( Lipcius and Herrnkind 1982 ; O'Halloran and O'Dor 1988 ).…”

Electrolyte and Gas Exchange During the Moulting Cycle of a Freshwater Crayfish

“…The present finding that M Ol is highest immediately premoult (Fig. 4) agrees with certain studies (Scudamore, 1947;Penkoff and Thurberg, 1982). Some (Scudamore, 1947;Lewis and Haefner, 1976) have suggested that the rate drops during the actual shedding process, based on measurements made using closed respirometers.…”

“…Some (Scudamore, 1947;Lewis and Haefner, 1976) have suggested that the rate drops during the actual shedding process, based on measurements made using closed respirometers. Some authors have reported elevated postmoult rates for up to 2 days (Scudamore, 1947;Penkoff and Thurberg, 1982;Mangum et al 1985). In the present study the mass-specific MQr eturned to control levels within a day.…”

“…In the present study the mass-specific MQr eturned to control levels within a day. By 8 days postmoult, M O2 had dropped significantly below the previous intermoult value as reported by Penkoff and Thurberg (1982); when converted to whole-animal rates there was no difference in successive intermoult rates, suggesting that this was an artefact of the increase in mass due to water loading. M C o 2 dropped significantly below M Ol for the first 4 days postmoult, possibly representing the net result of HCO 3 ~ uptake countering CO 2 elimination.…”

The effect of temperature, aerial exposure and disturbance on oxygen consumption in the lobster,Homarus gammarus(L.)

“……”

Impacts of Endogenous Factors and Ontogenetic Stages on the Metabolic Rate of the Mediterranean Spider Crab Maja squinado (Herbst, 1788)

“…Postmolt individuals (stages A, B) have a much lower metabolic rate than intermolt or premolt animals (stages C and D, respectively). This is consistent with data obtained on the American lobster, Homarus americanus ( Penkoff and Thurberg 1982 ). Locomotor and feeding activities significantly decrease or even cease during molting in crustaceans, remain low in postmolt animals, and only begin to increase again at stage B2 or C1, reaching their maximum during intermolt ( Lipcius and Herrnkind 1982 ; O'Halloran and O'Dor 1988 ).…”

Electrolyte and Gas Exchange During the Moulting Cycle of a Freshwater Crayfish

“…The present finding that M Ol is highest immediately premoult (Fig. 4) agrees with certain studies (Scudamore, 1947;Penkoff and Thurberg, 1982). Some (Scudamore, 1947;Lewis and Haefner, 1976) have suggested that the rate drops during the actual shedding process, based on measurements made using closed respirometers.…”

“…Some (Scudamore, 1947;Lewis and Haefner, 1976) have suggested that the rate drops during the actual shedding process, based on measurements made using closed respirometers. Some authors have reported elevated postmoult rates for up to 2 days (Scudamore, 1947;Penkoff and Thurberg, 1982;Mangum et al 1985). In the present study the mass-specific MQr eturned to control levels within a day.…”

“…In the present study the mass-specific MQr eturned to control levels within a day. By 8 days postmoult, M O2 had dropped significantly below the previous intermoult value as reported by Penkoff and Thurberg (1982); when converted to whole-animal rates there was no difference in successive intermoult rates, suggesting that this was an artefact of the increase in mass due to water loading. M C o 2 dropped significantly below M Ol for the first 4 days postmoult, possibly representing the net result of HCO 3 ~ uptake countering CO 2 elimination.…”

The effect of temperature, aerial exposure and disturbance on oxygen consumption in the lobster,Homarus gammarus(L.)

“……”

Impacts of Endogenous Factors and Ontogenetic Stages on the Metabolic Rate of the Mediterranean Spider Crab Maja squinado (Herbst, 1788)

“…Postmolt individuals (stages A, B) have a much lower metabolic rate than intermolt or premolt animals (stages C and D, respectively). This is consistent with data obtained on the American lobster, Homarus americanus ( Penkoff and Thurberg 1982 ). Locomotor and feeding activities significantly decrease or even cease during molting in crustaceans, remain low in postmolt animals, and only begin to increase again at stage B2 or C1, reaching their maximum during intermolt ( Lipcius and Herrnkind 1982 ; O'Halloran and O'Dor 1988 ).…”

Electrolyte and Gas Exchange During the Moulting Cycle of a Freshwater Crayfish

“…The present finding that M Ol is highest immediately premoult (Fig. 4) agrees with certain studies (Scudamore, 1947;Penkoff and Thurberg, 1982). Some (Scudamore, 1947;Lewis and Haefner, 1976) have suggested that the rate drops during the actual shedding process, based on measurements made using closed respirometers.…”

“…Some (Scudamore, 1947;Lewis and Haefner, 1976) have suggested that the rate drops during the actual shedding process, based on measurements made using closed respirometers. Some authors have reported elevated postmoult rates for up to 2 days (Scudamore, 1947;Penkoff and Thurberg, 1982;Mangum et al 1985). In the present study the mass-specific MQr eturned to control levels within a day.…”

“…In the present study the mass-specific MQr eturned to control levels within a day. By 8 days postmoult, M O2 had dropped significantly below the previous intermoult value as reported by Penkoff and Thurberg (1982); when converted to whole-animal rates there was no difference in successive intermoult rates, suggesting that this was an artefact of the increase in mass due to water loading. M C o 2 dropped significantly below M Ol for the first 4 days postmoult, possibly representing the net result of HCO 3 ~ uptake countering CO 2 elimination.…”

The effect of temperature, aerial exposure and disturbance on oxygen consumption in the lobster,Homarus gammarus(L.)

“……”