Marine Science Faculty Publications
The jumbo squid, Dosidicus gigas (Ommastrephidae), Living in Oxygen Minimum Zones II: Blood–oxygen Binding
Document Type
Article
Publication Date
2013
Digital Object Identifier (DOI)
https://doi.org/10.1016/j.dsr2.2012.10.003
Abstract
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 (P50=0.009T2.03, pH 7.4; Bohr coefficient=ΔlogP50/ΔpH=−1.55+0.034T) 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.
Was this content written or created while at USF?
No
Citation / Publisher Attribution
Deep Sea Research Part II: Topical Studies in Oceanography, v. 95, p. 139-144
Scholar Commons Citation
Seibel, Brad A., "The jumbo squid, Dosidicus gigas (Ommastrephidae), Living in Oxygen Minimum Zones II: Blood–oxygen Binding" (2013). Marine Science Faculty Publications. 2357.
https://digitalcommons.usf.edu/msc_facpub/2357
