Vertical movements of Pacific bluefin tuna (Thunnus orientalis) and dolphinfish (Coryphaena hippurus) relative to the thermocline in the northern East China Sea

Furukawa, Seishiro; Tsuda, Yuichi; Nishihara, Gregory N.; Fujioka, Ko; Ohshimo, Seiji; Tomoe, Seitaro; Nakatsuka, Naoyuki; Kimura, Hirokazu; Aoshima, Takashi; Kanehara, Hisao; Kitagawa, Takashi; Chiang, Wei‐Chuan; Nakata, Hideaki; Kawabe, Ryo

doi:10.1016/j.fishres.2013.09.004

Cited by 34 publications

(31 citation statements)

References 19 publications

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“…In the present study, the tagged dolphinfish spent most of their time above 30 m depth. Furukawa et al (2011Furukawa et al ( , 2014 suggested that dolphinfish spend most of their time in shallow waters to avoid rapid changes in temperature and thus minimize energy use by remaining in isothermal conditions above the thermocline. Our findings indicate that the dolphinfish occasionally crossed the thermocline (when it was detected), a behavior also reported by Furukawa et al (2011) and Merten et al (2014c).…”

Section: Discussionmentioning

confidence: 99%

“…The input of Raúl Martínez-Rincón (data analysis and R software use) and Patricia González-Zamorano (map depelopment and data analysis) is gratefully la profundidad a la que los dorados pasaron la mayor parte del tiempo durante el presente estudio (30 m). Otros autores, han sugerido que la preferencia del hábitat de los dorados en aguas someras es una estrategia para evitar cambios bruscos de temperatura y así disminuir el gasto de energía al permanecer en condiciones isotérmicas arriba de la termoclina (Furukawa et al 2011(Furukawa et al , 2014. En este estudio, el dorado cruzó ocasionalmente la termoclina (cuando ésta fue detectada), y este mismo comportamiento también fue reportado por Furukawa et al (2011) y Merten et al (2014c.…”

Section: Discussionunclassified

“…Studies have analyzed their movements around floating fish aggregating devices and described their movements in the open sea (Furukawa et al 2011(Furukawa et al , 2014Merten et al 2014aMerten et al , 2014bMerten et al , 2014c. These studies indicate that dolphinfish tend to stay above the thermocline (Furukawa et al 2011) and that they are able to perform directed movements and return to their point of origin .…”

Section: Horizontal and Vertical Movements Of The Common Dolphinfish mentioning

confidence: 99%

“…La información sobre los movimientos del dorado aún es escasa y principalmente describe los movimientos con relación a la presencia de dispositivos agregadores de peces ) y los movimientos en mar abierto (Furukawa et al 2011(Furukawa et al , 2014Merten et al 2014aMerten et al , 2014bMerten et al , 2014c. Se ha descrito que el dorado generalmente permanece a una profundidad por encima de la termoclina (Furukawa et al 2011) y que sus movimientos pueden regresar al punto de marcado .…”

Section: Study Area and Taggingunclassified

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Horizontal and vertical movements of the common dolphinfish (Coryphaena hippurus) in La Paz Bay, Mexico

2015

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ABSTRACT. The common dolphinfish (Coryphaena hippurus) is an important resource for the sport-fishing industry in Mexico. It is captured incidentally by the eastern Pacific purse-seine tuna fishery and in coastal areas by artisanal fisheries. Although it is considered a highly migratory species, only few studies of its movements are available. In this study, the behavior of the common dolphinfish was analyzed by means of acoustic telemetry at three locations within La Paz Bay (southern Gulf of California) from summer to autumn 2013. Acoustic transmitters were attached to six individuals and they were tracked for periods of up to 48 h. Every hour, vertical profiles of temperature and bathymetry were made. To determine the effect of biotic (sex) and abiotic (water temperature and depth, thermocline depth, hour, and bathymetry) variables on the horizontal and vertical movements of tagged organisms, generalized additive mixed models were applied. The results showed a tendency of horizontal movements to the southwestern zone of the bay; two individuals crossed from the eastern to the western side. The average speed was 0.51 m s -1 . The vertical movements showed that the individuals spent 80% of the time above 34 m depth, of which around 45% was spent in the upper 10 m of the water column. During daylight hours they swam in shallow waters (upper 10 m) and at night they performed deeper dives (73 m maximum depth). Biotic and abiotic variables influenced both types of movements; however, bathymetry and temperature largely explained fish movements.Key words: horizontal and vertical movements, Coryphaena hippurus, La Paz Bay, acoustic transmitters. RESUMEN.El dorado (Coryphaena hippurus) es un recurso importante para la pesca deportiva en México. Es capturado incidentalmente por la flota atunera de cerco en el Pacífico oriental y en áreas costeras por la pesca artesanal. Aunque es considerada una especie altamente migratoria, existen pocos estudios sobre sus movimientos. En este estudio se analizaron los movimientos del dorado por medio de telemetría acústica en tres localidades dentro de la bahía de La Paz, parte sur del golfo de California, entre verano y otoño de 2013. Se adhirieron transmisores acústicos a seis individuos y se siguieron durante periodos de hasta 48 h. Cada hora, se hicieron perfiles verticales de temperatura y batimetría. Para determinar el efecto de variables bióticas (sexo) y abióticas (temperatura y profundidad del agua, profundidad de la termoclina, hora y batimetría) sobre los movimientos horizontales y verticales de los organismos marcados, se aplicaron modelos aditivos generalizados mixtos. Los resultados mostraron una tendencia a movimientos horizontales a la zona suroeste de bahía de La Paz; dos movimientos atravesaron la bahía de sureste a suroeste. La velocidad promedio fue de 0.51 m s -1 . Los movimientos verticales indicaron que los individuos estuvieron por encima de los 34 m de profundidad el 80% del tiempo, del cual aproximadamente 45% estuvieron en los 10 m superiores. En horas de lu...

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Section: Discussionmentioning

confidence: 99%

Section: Discussionunclassified

Section: Horizontal and Vertical Movements Of The Common Dolphinfish mentioning

confidence: 99%

Section: Study Area and Taggingunclassified

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Horizontal and vertical movements of the common dolphinfish (Coryphaena hippurus) in La Paz Bay, Mexico

2015

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“…It lives in tropical and subtropical areas of the Atlantic, Indian, and Pacific Oceans (Massuti, Deudero, Sanchez, & Morales-Nim, 1998;Norton, 2000;CIB, 2007;Merten, Appeldoorn, & Hammond, 2014) and is believed to migrate seasonally to warm areas (mean water temperature of 28°C) (Palko, Beardsley, & Richards, 1982). Coastal distribution and abundance seems to be strongly related to surface temperature and distance from temperature fronts (Farrel, Boustany, Halpin, & Hammond, 2014;Furukawa et al, 2014). The dolphinfish has a high growth rate and fast sexual maturity (Alemany & Massuti, 1998;Castro, Santiago, Hernandez-Garcia, & Pla, 1999), which may be associated with physiological adaptations for a pelagic predator (Benetti, Brill, & Kraul, 1995).…”

mentioning

confidence: 99%

Evaluación de la pesca del pez delfín Coryphaena hippurus (Perciformes: Coryphaenidae) en el Pacífico de Panamá

Guzmán¹,

Díaz-Ferguson

Vega

et al. 2015

RBT

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Mercury stable isotopes reveal sources of methylmercury and prey in giant Pacific bluefin tuna from the western North Pacific Ocean

Chen

Ang

et al. 2023

Limnol Oceanogr Letters

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Pacific bluefin tuna (PBT) is a long-lived, migratory apex predator that travels across vast areas of the North Pacific Ocean. Concentrations of the neurotoxin methylmercury (MeHg) are high in large PBT and increase with fish age. Mercury stable isotope ratios recorded in PBT muscle tissue show a major shift in the source of MeHg between juvenile PBT in the eastern North Pacific Ocean reported in a previous study and adult PBT (age 5 to more than 27 yr) from the west. In addition, a gradual increase in the accumulation of MeHg from epipelagic prey from the Kuroshio extension in adult PBT as they grow was observed. Finally, MeHg stable isotopes indicate that MeHg in the western North Pacific Ocean has a different source or undergoes different transformations before entering the oceanic food web than in the central and eastern North Pacific. These findings may help identify the source of the high concentrations of MeHg in PBT and other top predators from the western North Pacific Ocean.

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Vertical movements of Pacific bluefin tuna (Thunnus orientalis) and dolphinfish (Coryphaena hippurus) relative to the thermocline in the northern East China Sea

Cited by 34 publications

References 19 publications

Horizontal and vertical movements of the common dolphinfish (Coryphaena hippurus) in La Paz Bay, Mexico

Horizontal and vertical movements of the common dolphinfish (Coryphaena hippurus) in La Paz Bay, Mexico

Evaluación de la pesca del pez delfín Coryphaena hippurus (Perciformes: Coryphaenidae) en el Pacífico de Panamá

Mercury stable isotopes reveal sources of methylmercury and prey in giant Pacific bluefin tuna from the western North Pacific Ocean

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