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Reproductive aspects (spawning season, size and weight at maturity, and fecundity) of Octopus hubbsorum are reported for Espiritu Santo Island, southern Gulf of California (Mexico). A total of 230 octopuses were captured (46% females and 54% males) between June 2006 and June 2007. The sex ratio was not significantly different from 1:1 (P greater than 0.05) except in November, when more males were captured than females. Four sexual maturity stages were established for both sexes: immature, maturing, mature, and prespawning (for females) or spawning (for males). The principal spawning season of O. hubbsorum occurred in autumn, when sea surface temperature ranged from 24 to 29 oC. The size and weight at maturity were 390 mm and 445 g, respectively, for males and 490 mm and 680 g, respectively, for females. The mean potential fecundity was 205,144 oocytes per female and the mean relative fecundity was 309 oocytes per gram of female body weight. Maturing females apparently use substances stored in the digestive gland.   Se reportan los aspectos reproductivos (temporada de desove, la talla y el peso de madurez, y la fecundidad) de Octopus hubbsorum para la Isla Espiritu Santo, sur del Golfo de California (Mexico). Se capturo un total de 230 pulpos (46% hembras y 54% machos) entre junio de 2006 y junio de 2007. La proporcion sexual no fue significativamente diferente a 1:1 (P mayor a 0.05) a excepcion de noviembre, cuando se capturaron mas machos que hembras. Se establecieron cuatro fases de madurez gonadica para ambos sexos: inmaduro, desarrollo, maduro y predesove (para hembras) o desove (para machos). La principal temporada de desove de O. hubbsorum se presento en otono, cuando se registro una temperatura superficial del mar entre 24 y 29 oC. La talla y el peso de madurez fue de 390 mm y 445 g, respectivamente, para los machos y de 490 mm y 680 g, respectivamente, para las hembras. La fecundidad potencial promedio fue de 205,144 ovocitos por hembra y la fecundidad relativa promedio fue de 309 ovocitos por gramo de peso corporal de la hembra. Aparentemente las hembras en desarrollo utilizan sustancias provenientes de la glandula digestiva.

Reproductive aspects of Octopus hubbsorum (Cephalopoda: Octopodidae) from Espíritu Santo Island, southern Gulf of California, Mexico