TY - JOUR
T1 - The jumbo squid, emDosidicus gigas/em (Ommastrephidae), Living in Oxygen Minimum Zones II: Blood–oxygen Binding
AU - Seibel, Brad A.
PY - 2013/1/1
Y1 - 2013/1/1
N2 - Dosidicus gigas is a large, metabolically active squid that migrates across a strong oxygen and temperature gradient in the Eastern Pacific. Here we analyze the oxygen-binding properties of the squid's respiratory protein (hemocyanin, Hc) that facilitate such activity. A high Hc–oxygen affinity, strong temperature dependence, and pronounced pH sensitivity ( P 50=0.009T2.03, pH 7.4; Bohr coefficient=Δlog P 50/ΔpH=−1.55+0.034 T ) of oxygen binding facilitate night-time foraging in the upper water column, and support suppressed oxygen demand in hypoxic waters at greater depths. Expanding hypoxia may act to alter the species habitable depth range. This analysis supports the contention that ocean acidification could limit oxygen carrying capacity in squids at warmer temperature leading to reduced activity levels or altered distribution.
AB - Dosidicus gigas is a large, metabolically active squid that migrates across a strong oxygen and temperature gradient in the Eastern Pacific. Here we analyze the oxygen-binding properties of the squid's respiratory protein (hemocyanin, Hc) that facilitate such activity. A high Hc–oxygen affinity, strong temperature dependence, and pronounced pH sensitivity ( P 50=0.009T2.03, pH 7.4; Bohr coefficient=Δlog P 50/ΔpH=−1.55+0.034 T ) of oxygen binding facilitate night-time foraging in the upper water column, and support suppressed oxygen demand in hypoxic waters at greater depths. Expanding hypoxia may act to alter the species habitable depth range. This analysis supports the contention that ocean acidification could limit oxygen carrying capacity in squids at warmer temperature leading to reduced activity levels or altered distribution.
UR - https://digitalcommons.usf.edu/msc_facpub/2357
UR - https://doi.org/10.1016/j.dsr2.2012.10.003
U2 - 10.1016/j.dsr2.2012.10.003
DO - 10.1016/j.dsr2.2012.10.003
M3 - Article
VL - 95
JO - Deep Sea Research Part II: Topical Studies in Oceanography
JF - Deep Sea Research Part II: Topical Studies in Oceanography
ER -