title: The effect of temperature on postprandial metabolism of yellowfin tuna (Thunnus albacares).
abstract: Specific dynamic action (SDA), the increase in metabolic expenditure associated with consumption of a meal, represents a substantial portion of fish energy budgets and is highly influenced by ambient temperature. The effect of temperature on SDA has not been studied in yellowfin tuna (Thunnus albacares, Bonnaterre 1788), an active pelagic predator that occupies temperate and subtropical waters. The energetic cost and duration of SDA were calculated by comparing routine and post-prandial oxygen consumption rates. Mean routine metabolic rates in yellowfin tuna increased with temperature, from 136 mg O2 kg(-1)h(-1) at 20 °C to 211 mg O2 kg(-1)h at 24 °C. The mean duration of SDA decreased from 40.2h at 20 °C to 33.1h at 24 °C, while mean SDA coefficient, the percentage of energy in a meal that is consumed during digestion, increased from 5.9% at 20 °C to 12.7% at 24 °C. Digestion in yellowfin tuna is faster at a higher temperature but requires additional oxidative energy. Enhanced characterization of the role of temperature in SDA of yellowfin tuna deepens our understanding of tuna physiology and can help improve management of aquaculture and fisheries.
authors.affiliation: Emmett Interdisciplinary Program in Environment and Resources, Stanford University, Stanford, CA 94305, USA. Electronic address: dklinger@princeton.edu.
authors.forename: Dane H
authors.initials: DH
authors.lastname: Klinger
authors.affiliation: Department of Biology, Hopkins Marine Station, Stanford University, Pacific Grove, CA 93950, USA.
authors.forename: Jonathan J
authors.initials: JJ
authors.lastname: Dale
authors.affiliation: Department of Biology, Hopkins Marine Station, Stanford University, Pacific Grove, CA 93950, USA.
authors.forename: Adrian C
authors.initials: AC
authors.lastname: Gleiss
authors.affiliation: Tuna Research and Conservation Center, Monterey Bay Aquarium, Monterey, CA 93940, USA.
authors.forename: Tyler
authors.initials: T
authors.lastname: Brandt
authors.affiliation: Tuna Research and Conservation Center, Monterey Bay Aquarium, Monterey, CA 93940, USA.
authors.forename: Ethan E
authors.initials: EE
authors.lastname: Estess
authors.affiliation: Department of Biology, Hopkins Marine Station, Stanford University, Pacific Grove, CA 93950, USA.
authors.forename: Luke
authors.initials: L
authors.lastname: Gardner
authors.affiliation: Department of Biology, Hopkins Marine Station, Stanford University, Pacific Grove, CA 93950, USA.
authors.forename: Benjamin
authors.initials: B
authors.lastname: Machado
authors.affiliation: Tuna Research and Conservation Center, Monterey Bay Aquarium, Monterey, CA 93940, USA.
authors.forename: Alex
authors.initials: A
authors.lastname: Norton
authors.affiliation: Tuna Research and Conservation Center, Monterey Bay Aquarium, Monterey, CA 93940, USA.
authors.forename: Luis
authors.initials: L
authors.lastname: Rodriguez
authors.affiliation: Tuna Research and Conservation Center, Monterey Bay Aquarium, Monterey, CA 93940, USA.
authors.forename: James
authors.initials: J
authors.lastname: Stiltner
authors.affiliation: Tuna Research and Conservation Center, Monterey Bay Aquarium, Monterey, CA 93940, USA.
authors.forename: Charles
authors.initials: C
authors.lastname: Farwell
authors.affiliation: Department of Biology, Hopkins Marine Station, Stanford University, Pacific Grove, CA 93950, USA.
authors.forename: Barbara A
authors.initials: BA
authors.lastname: Block
mesh_terms: D000818:Animals; D019518:Postprandial Period / Q000502:physiology*; D013696:Temperature; D014413:Tuna / Q000378:metabolism*
keywords: Digestion; Energetics; Respiration; SDA; Temperature; Thunnus albacares; Yellowfin tuna