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Vampire blood: respiratory physiology of the vampire squid (Cephalopoda: Vampyromorpha) in relation to the oxygen minimum layer

Abstract

The functional properties of the haemocyanin ofVampyroteuthis infernalis (Cephalopoda: Vampyromorpha), measured at 5 °C, are reported and discussed in relation to hypoxia. The oxygen affinity of this haemocyanin (P50=0.47−0.55 kPa) is higher than any previously measured for a cephalopod. The high cooperativity (n50=2.20−2.23) and Bohr coefficient (−0.22) suggest a true transport function for this haemocyanin. This high-affinity haemocyanin, in conjunction with moderate gill diffusion capacity, provides a sufficient oxygen gradient from the environment to the blood to support the low routine oxygen consumption rate of V. infernalis

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Correspondence to Francois H. Lallier.

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Seibel, B.A., Chausson, F., Lallier, F.H. et al. Vampire blood: respiratory physiology of the vampire squid (Cephalopoda: Vampyromorpha) in relation to the oxygen minimum layer. EBO 4, 1–10 (1999). https://doi.org/10.1007/s00898-999-0001-2

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  • DOI: https://doi.org/10.1007/s00898-999-0001-2

Key words

  • Deep sea
  • Haemocyanin
  • Hypoxia