Temperature regulation in free-swimming bluefin tuna

Carey, Francis G.; Lawson, Kenneth D.

doi:10.1016/0300-9629(73)90490-8

Cited by 138 publications

(82 citation statements)

References 10 publications

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“…While SDA is evident as an increase in metabolic rate in most fishes and can be measured in a respirometer, measuring a thermal increment is problematic because of the heat losses associated with respiration and conduction. In bluefin tuna, counter-current visceral heat exchangers conserve the heat from digestion, leading to a measurable warming of the viscera that has been reported in all three bluefin species (Carey and Lawson, 1973;Clark et al, 2010). Postprandial visceral warming in bluefin tuna is thought to be a result of increased heat production from the hydrolytic breakdown of food, the biochemical processes of digestion and assimilation, and heat conservation by the visceral retia mirabilia (Carey et al, 1984).…”

Section: Discussionmentioning

confidence: 99%

Quantifying energy intake in Pacific bluefin tuna (Thunnus orientalis) using the heat increment of feeding

Whitlock

Walli

Cermeño

et al. 2013

Journal of Experimental Biology

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SUMMARYUsing implanted archival tags, we examined the effects of meal caloric value, food type (sardine or squid) and ambient temperature on the magnitude and duration of the heat increment of feeding in three captive juvenile Pacific bluefin tuna. The objective of our study was to develop a model that can be used to estimate energy intake in wild fish of similar body mass. Both the magnitude and duration of the heat increment of feeding (measured by visceral warming) showed a strong positive correlation with the caloric value of the ingested meal. Controlling for meal caloric value, the extent of visceral warming was significantly greater at lower ambient temperature. The extent of visceral warming was also significantly higher for squid meals compared with sardine meals. By using a hierarchical Bayesian model to analyze our data and treating individuals as random effects, we demonstrate how increases in visceral temperature can be used to estimate the energy intake of wild Pacific bluefin tuna of similar body mass to the individuals used in our study. Supplementary material available online at

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Section: Discussionmentioning

confidence: 99%

Quantifying energy intake in Pacific bluefin tuna (Thunnus orientalis) using the heat increment of feeding

Whitlock

Walli

Cermeño

et al. 2013

Journal of Experimental Biology

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“…Acoustic tagging data from wild fish indicate that slowtwitch muscle temperatures are more stable than visceral temperatures in both large and small Atlantic and Pacific bluefin (Carey and Lawson, 1973;Carey and Teal, 1969;Marcinek et al, 2001). However, it is unclear whether 8-10·kg bluefin are capable of maintaining stable muscle temperatures during extended exposure to 8-10°C water.…”

Section: Discussionmentioning

confidence: 99%

Temperature effects on metabolic rate of juvenile Pacific bluefin tunaThunnus orientalis

Blank

Morrissette

Farwell

et al. 2007

Journal of Experimental Biology

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SUMMARY Pacific bluefin tuna inhabit a wide range of thermal environments across the Pacific ocean. To examine how metabolism varies across this thermal range,we studied the effect of ambient water temperature on metabolic rate of juvenile Pacific bluefin tuna, Thunnus thynnus, swimming in a swim tunnel. Rate of oxygen consumption(ṀO2) was measured at ambient temperatures of 8–25°C and swimming speeds of 0.75–1.75 body lengths (BL) s–1. Pacific bluefin swimming at 1 BL s–1 per second exhibited a U-shaped curve of metabolic rate vs ambient temperature, with a thermal minimum zone between 15°C to 20°C. Minimum ṀO2 of 175±29 mg kg–1 h–1 was recorded at 15°C, while both cold and warm temperatures resulted in increased metabolic rates of 331±62 mg kg–1 h–1at 8°C and 256±19 mg kg–1 h–1 at 25°C. Tailbeat frequencies were negatively correlated with ambient temperature. Additional experiments indicated that the increase in ṀO2 at low temperature occurred only at low swimming speeds. Ambient water temperature data from electronic tags implanted in wild fish indicate that Pacific bluefin of similar size to the experimental fish used in the swim tunnel spend most of their time in ambient temperatures in the metabolic thermal minimum zone.

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“…Although this observation does not assure longer-term survival, postrelease feeding is a critical step that must occur in order to facilitate recovery (Aalbers et al, 2004;Cooke & Schramm, 2007;Meka & Margraf, 2007). We also observed repeated periods of increased vertical movements (oscillations) during the track sessions, behaviors that have been shown to be associated with foraging activity in several pelagic species (Carey & Lawson, 1973;Pepperell & Davis, 1999;Sepulveda et al, 2004;Cartamil et al, 2010;Nakamura et al, 2011). These behaviors also contrast the unidirectional movements commonly associated with moribund behavior (Moyes et al, 2006;Heberer et al, 2010).…”

Section: Survivorshipmentioning

confidence: 82%

Post release survival and movement patterns of roosterfish (Nematistius pectoralis) off the Central American coastline

Sepúlveda¹,

Aalbers²,

Bernal³

2015

lajar

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ABSTRACT. Acoustic telemetry was used to assess immediate post-release survival and track the short-term movement patterns of roosterfish Nematistius pectoralis between 2008 and 2010. Seven roosterfish (85 to 146 cm fork length, FL) were continuously tracked along the Central American coastline for periods of up to 28 h following capture on recreational fishing tackle. All seven roosterfish were initially captured and spent the duration of the track period proximal to the coastline in waters <100 m of depth. From depth records and horizontal movements, it was determined that all seven roosterfish survived the acute effects of capture. The greatest depth achieved by any of the tracked individuals was 62 m and collectively roosterfish spent over 90% of the track records between the surface and 12 m. For all tracks, fish size showed no effect on maximum or average dive depth and the average day (7 ± 2 m) and night (6 ± 2 m) depths were similar among individuals. Mean water temperature for all tracks was 28 ± 1°C, with the lowest temperature experienced at depth being 23°C. Total horizontal movements from the roosterfish in this study ranged from 14.7 to 42.2 km and averaged 1.5 ± 0.4 km h -1. Data on movements in relation to bathymetry, prey presence and habitat structure are discussed. Collectively, these data provide insight into the immediate post-release disposition and short-term movements of this poorly studied species along the coast of Central America. Keywords: Nematistius pectoralis, roosterfish, Nematistidae, sport fishing, ecology, Central American coast.Sobrevivencia post-liberación y patrones de desplazamiento del pez gallo (Nematistius pectoralis) frente a la costa centroamericana RESUMEN. Durante el 2008-2010 se utilizó telemetría acústica para determinar los movimientos verticales y horizontales de corto plazo en pejegallo, Nematistius pectoralis, y evaluar la sobrevivencia inmediata después de ser capturados. Se siguieron en forma continua los movimientos de siete pejegallos (85 a 146 cm de longitud furcal) en la costa centroamericana por periodos de hasta 28 h después de ser capturados mediante métodos de pesca deportiva. Todos los pejegallo marcados pasaron la totalidad de su tiempo en aguas costeras a menos de 100 m de profundidad. Los datos de profundidad y de movimiento horizontal mostraron que todos los peces sobrevivieron a la captura. La profundidad máxima obtenida por un pez fue de 62 m y conjuntamente todos los individuos pasaron más del 90% de su tiempo entre la superficie y 12 m de profundidad. Los datos de movimientos no mostraron relación entre la longitud y la profundad máxima o promedio; la profundidad promedio durante el día (7 ± 2 m) y la noche (6 ± 2 m) no fue diferente. La temperatura promedio del agua durante el estudio fue de 28 ± 1ºC y la temperatura mínima fue de 23ºC. Los movimientos horizontales totales variaron de 14,7 a 42,2 km, con una velocidad media de 1,5 ± 0,4 km h -1. En este trabajo se presenta y discute datos de desplazamientos en relación con la batimetría, pre...

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Temperature regulation in free-swimming bluefin tuna

Cited by 138 publications

References 10 publications

Quantifying energy intake in Pacific bluefin tuna (Thunnus orientalis) using the heat increment of feeding

Quantifying energy intake in Pacific bluefin tuna (Thunnus orientalis) using the heat increment of feeding

Temperature effects on metabolic rate of juvenile Pacific bluefin tunaThunnus orientalis

Post release survival and movement patterns of roosterfish (Nematistius pectoralis) off the Central American coastline

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