Bathyal octopus, , living in a world of acid: First recordings of routine metabolic rate and critical oxygen partial pressures of a deep water species under elevated CO.

Elevated atmospheric CO as a result of human activity is dissolving into the world's oceans, driving a drop in pH, and making them more acidic. Here we present the first data on the impacts of ocean acidification on a bathyal species of octopus . A recent discovery of a shallow living population in the Salish Sea, Washington United States allowed collection SCUBA and maintenance in the lab.

Impact of Short- and Long-Term Exposure to Elevated Seawater Pco on Metabolic Rate and Hypoxia Tolerance in .

AbstractMuch of the CO released by human activity into the atmosphere is dissolving into the oceans, making them more acidic. In this study we provide the first data on the short- and long-term impacts of ocean acidification on octopuses. We measured routine metabolic rate (RMR) of at elevated CO pressure (Pco) with no prior acclimation and 1 or 5 wk of acclimation and critical oxygen pressure (P) after 5 wk of acclimation.

Linking muscle metabolism and functional variation to field swimming performance in bluegill sunfish (Lepomis macrochirus).

Skeletal muscle has diverse mechanical roles during locomotion. In swimming fish, power-producing muscles work in concert with the accessory muscles of the fins which augment and control power transfer to the water. Although fin muscles represent a significant proportion of the locomotor muscle mass, their physiological properties are poorly characterized.

Slow swimming, fast strikes: effects of feeding behavior on scaling of anaerobic metabolism in epipelagic squid.

Many pelagic fishes engage prey at high speeds supported by high metabolic rates and anaerobic metabolic capacity. Epipelagic squids are reported to have among the highest metabolic rates in the oceans as a result of demanding foraging strategies and the use of jet propulsion, which is inherently inefficient. This study examined enzymatic proxies of anaerobic metabolism in two species of pelagic squid, Dosidicus gigas and Doryteuthis pealeii (Lesueur 1821), over a size range of six orders of magnitude.