The function of the cellular haemoglobins in Capitella capitata (Fabricius) and Notomastus latericeus Sars (Capitellidae: Polychaeta)

THE ALLOMETRY OF DEPOSIT FEEDING INCAPITELLASPECIES I (POLYCHAETA:CAPITELLIDAE): THE ROLE OF TEMPERATURE AND PELLET WEIGHT IN THE CONTROL OF EGESTION

“…The cellular hemoglobin of C. capitata has a very high affinity for oxygen (P 50 = 3 mm Hg; Wells and Warren, 1975) and sulfide has been shown to be a larval settlement cue for Capitella species I (Cuomo, 1985). These data indicate that the genus Capitella is adapted to exploit organic-rich low oxygen habitats.…”

“…However, experiments by Warren (1977) and studies reviewed by Pearson and Rosenberg (1978) suggest that Capitella capitata is not exceptionally tolerant of low oxygen or high sulfide concentrations. Interstitial oxygen partial pressures from the organic sediments occupied by Capitella capitata are very low (8-12 mm Hg; Wells and Warren, 1975), suggesting that tube irrigation may be important in this species. Wells (1949) was able to simultaneously measure irrigation and proboscideal activity in the polychaete Arenicola marina and found an inverse relationship with a periodicity of three to four minutes.…”

THE ALLOMETRY OF DEPOSIT FEEDING INCAPITELLASPECIES I (POLYCHAETA:CAPITELLIDAE): THE ROLE OF TEMPERATURE AND PELLET WEIGHT IN THE CONTROL OF EGESTION

“…The cellular hemoglobin of C. capitata has a very high affinity for oxygen (P 50 = 3 mm Hg; Wells and Warren, 1975) and sulfide has been shown to be a larval settlement cue for Capitella species I (Cuomo, 1985). These data indicate that the genus Capitella is adapted to exploit organic-rich low oxygen habitats.…”

“…However, experiments by Warren (1977) and studies reviewed by Pearson and Rosenberg (1978) suggest that Capitella capitata is not exceptionally tolerant of low oxygen or high sulfide concentrations. Interstitial oxygen partial pressures from the organic sediments occupied by Capitella capitata are very low (8-12 mm Hg; Wells and Warren, 1975), suggesting that tube irrigation may be important in this species. Wells (1949) was able to simultaneously measure irrigation and proboscideal activity in the polychaete Arenicola marina and found an inverse relationship with a periodicity of three to four minutes.…”

Globins in the marine annelid Platynereis dumerilii shed new light on hemoglobin evolution in bilaterians

“…One is the leech Helobdella robusta in which no clade I globins are detected. The other is Capitella teleta that present a large family of strongly related clade I intracellular globins, that are suspected to have a respiratory function [ 35 ]. All the families of circulating respiratory globins present in distant groups in our analyses (vertebrate red cell globins, Daphnia extracellular globins, annelid extracellular globins, Capitella red cell globins) thus correspond to independent event of gene recruitment and duplications, seemingly from a single ancestral clade I globin.…”

The ecology ofCapitella capitatain British waters

“…The results of the tests on the toleration of lowered P Os are given in Table 6. Under laboratory conditions adult C. capitata can survive for at least 1 month at an oxygen tension of 2 mmHg which is much lower than the 8-12 mmHg encountered at Warren Point (Wells & Warren, 1975). The aggregated dispersion of C. capitata was well marked.…”

THE ALLOMETRY OF DEPOSIT FEEDING INCAPITELLASPECIES I (POLYCHAETA:CAPITELLIDAE): THE ROLE OF TEMPERATURE AND PELLET WEIGHT IN THE CONTROL OF EGESTION

“…The cellular hemoglobin of C. capitata has a very high affinity for oxygen (P 50 = 3 mm Hg; Wells and Warren, 1975) and sulfide has been shown to be a larval settlement cue for Capitella species I (Cuomo, 1985). These data indicate that the genus Capitella is adapted to exploit organic-rich low oxygen habitats.…”

“…However, experiments by Warren (1977) and studies reviewed by Pearson and Rosenberg (1978) suggest that Capitella capitata is not exceptionally tolerant of low oxygen or high sulfide concentrations. Interstitial oxygen partial pressures from the organic sediments occupied by Capitella capitata are very low (8-12 mm Hg; Wells and Warren, 1975), suggesting that tube irrigation may be important in this species. Wells (1949) was able to simultaneously measure irrigation and proboscideal activity in the polychaete Arenicola marina and found an inverse relationship with a periodicity of three to four minutes.…”

Globins in the marine annelid Platynereis dumerilii shed new light on hemoglobin evolution in bilaterians

“…One is the leech Helobdella robusta in which no clade I globins are detected. The other is Capitella teleta that present a large family of strongly related clade I intracellular globins, that are suspected to have a respiratory function [ 35 ]. All the families of circulating respiratory globins present in distant groups in our analyses (vertebrate red cell globins, Daphnia extracellular globins, annelid extracellular globins, Capitella red cell globins) thus correspond to independent event of gene recruitment and duplications, seemingly from a single ancestral clade I globin.…”

The ecology ofCapitella capitatain British waters

“…The results of the tests on the toleration of lowered P Os are given in Table 6. Under laboratory conditions adult C. capitata can survive for at least 1 month at an oxygen tension of 2 mmHg which is much lower than the 8-12 mmHg encountered at Warren Point (Wells & Warren, 1975). The aggregated dispersion of C. capitata was well marked.…”

THE ALLOMETRY OF DEPOSIT FEEDING INCAPITELLASPECIES I (POLYCHAETA:CAPITELLIDAE): THE ROLE OF TEMPERATURE AND PELLET WEIGHT IN THE CONTROL OF EGESTION

“…The cellular hemoglobin of C. capitata has a very high affinity for oxygen (P 50 = 3 mm Hg; Wells and Warren, 1975) and sulfide has been shown to be a larval settlement cue for Capitella species I (Cuomo, 1985). These data indicate that the genus Capitella is adapted to exploit organic-rich low oxygen habitats.…”

“…However, experiments by Warren (1977) and studies reviewed by Pearson and Rosenberg (1978) suggest that Capitella capitata is not exceptionally tolerant of low oxygen or high sulfide concentrations. Interstitial oxygen partial pressures from the organic sediments occupied by Capitella capitata are very low (8-12 mm Hg; Wells and Warren, 1975), suggesting that tube irrigation may be important in this species. Wells (1949) was able to simultaneously measure irrigation and proboscideal activity in the polychaete Arenicola marina and found an inverse relationship with a periodicity of three to four minutes.…”

Globins in the marine annelid Platynereis dumerilii shed new light on hemoglobin evolution in bilaterians

“…One is the leech Helobdella robusta in which no clade I globins are detected. The other is Capitella teleta that present a large family of strongly related clade I intracellular globins, that are suspected to have a respiratory function [ 35 ]. All the families of circulating respiratory globins present in distant groups in our analyses (vertebrate red cell globins, Daphnia extracellular globins, annelid extracellular globins, Capitella red cell globins) thus correspond to independent event of gene recruitment and duplications, seemingly from a single ancestral clade I globin.…”

The ecology ofCapitella capitatain British waters

“…The results of the tests on the toleration of lowered P Os are given in Table 6. Under laboratory conditions adult C. capitata can survive for at least 1 month at an oxygen tension of 2 mmHg which is much lower than the 8-12 mmHg encountered at Warren Point (Wells & Warren, 1975). The aggregated dispersion of C. capitata was well marked.…”