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espanolSe describe el uso del habitat vertical del atun aleta amarilla, Thunnus albacares, capturado y liberado con marca archivadora en la Reserva de la Biosfera Archipielago de Revillagigedo, Mexico, durante el periodo 2006–2011. Se analizo la serie de datos de temperatura interna, temperatura del ambiente, profundidad y hora del dia almacenados en 68 marcas archivadoras recuperadas de los atunes capturados, en su mayoria, en lances pesqueros asociados a delfines por barcos cerqueros atuneros de bandera Mexicana. Los atunes fueron clasificados para su analisis en 3 grupos de edad (I, II y III). Los movimientos verticales se analizaron dividiendo la columna de agua en 10 estratos de profundidad. Los 3 grupos de edad invirtieron mas tiempo en el estrato superficial (0–25 m) y su presencia fue disminuyendo a medida que fue aumentando la profundidad, con visitas ocasionales a profundidades mayores que 500 m. En el estrato de >500 m, el grupo de edad III, fue el que mas tiempo invirtio con un promedio de 45 min. La presencia a diferentes profundidades a lo largo del dia mostro diferencias significativas entre los grupos de edad (prueba χ2 de Wald, P EnglishA description of vertical habitat use by yellowfin tuna, Thunnus albacares, captured and released with archival tags in the Revillagigedo Archipelago Biosphere Reserve, Mexico, during the 2006–2011 period is given. An analysis was made of internal and ambient temperatures, depth, and time of day registered in 68 archival tags recovered from tuna caught mostly in sets associated with dolphins by Mexican purse-seine vessels. Tuna were classified into 3 age groups (I, II, and III) for analyses. Vertical movements were analyzed by dividing the water column into 10 depth strata. The 3 age groups remained the longest in the uppermost stratum (0–25 m), and their presence began to diminish in subsequent strata, with some occasional visits at >500-m depths. In the >500 m stratum, age group III was the one with the longest time investment with 45 min on average. Presence at different depths throughout the day showed significant differences among age groups (Wald’s test expressed as χ2, P

Vertical habitat utilization by tagged yellowfin tuna (Thunnus albacares) released in the Revillagigedo Archipelago Biosphere Reserve, Mexico