Myoglobin (Mb) buffers intracellular O2 and facilitates diffusion of O2 through the cell. These functions of Mb will be most effective when intracellular PO2 is near the partial pressure of oxygen at which Mb is half saturated (P50) of the molecule. We test the hypothesis that Mb oxygen affinity has evolved such that it is conserved when adjusted for body temperature among closely related anima...

Tuna appear able to maintain their muscles at 5-10 degrees C above ambient by balancing heat produced in situ and conserved by a counter-current heat exchanger with heat lost to the sea. Metabolite profiles under three different activity states (rest, burst swimming, and steady state swimming during feeding frenzies at sea) were used to identify which metabolic processes in white and red muscle...

Collagen peptide mass fingerprinting of archaeofaunal remains, or Zooarchaeology by Mass Spectrometry (ZooMS), has increasingly established itself as a valuable tool for improving our understanding highly-fragmented faunal assemblages. Although there have been developments in sampling strategies that attempted to reduce damage precious archaeological specimens, these tend yield spectra inferior...

Cortisol is recognized as a physiological indicator of stress in fish. However, this hormone typically measured plasma samples. In study, cortisol content was evaluated for the first time scales tropical tuna. The sample included 20 skipjack tuna (Katsuwonus pelamis) and 25 yellowfin (Thunnus albacares) collected Atlantic (the Gulf Guinea off Ivory Coast) Indian Ocean (off Reunion Island), thei...