Endogenous polyamine response in epiphytic Bonnemaisonia hamifera (Bonnemaisoniales: Rhodophyta) due to interaction with its host

Se describen la distribucion de frecuencia de tallas, proporcion de sexos y la relacion peso-longitud del pez vela Istiophorus platypterus en las costas de Mazatlan, Sinaloa en el Golfo de California. Los datos fueron recolectados de la pesca deportiva durante varios periodos de muestreo entre los anos 2002 y 2009. Se muestrearon 354 individuos: 185 hembras, 161 machos y 8 indiferenciados. El peso total (PT) vario entre 14 y 41 kg y la estructura de tallas entre 128 y 195 cm de longitud postorbital (LPO) detectandose diferencias significativas entre sexos (P 2 = 0.65). No se detectaron diferencias significativas en la relacion peso-longitud entre sexos (ANCOVA, P > 0.05) y se obtuvo una relacion PT = 0.0009 x LPO 2.009 para sexos combinados. El valor de la pendiente de b fue significativamente diferente de 3, lo que indica un crecimiento de tipo alometrico negativo (t Size structure, sex ratio and weight-length relationships of the sailfish i Istiophorus platypterus /i from Mazatlan, Sinaloa, Mexico We describe the size frequency distribution, sex ratio and weight-length relationship of the Indo-Pacific sailfish i Istiophorus platypterus /i off the coast of Mazatlan, Sinaloa, Gulf of California. Data were collected from the sports fishery during several sampling periods from 2002 to 2009. A total of 354 Sailfish were sampled, including 185 females, 161 males and 8 of unknown sex. Total weight (TW) varied from 14 to 41 kg, and sizes ranged between 128 and 195 cm postorbital length (PL), with significant differences between the sexes (P 0.05). The general equation relating weight and length for both sexes was TW = 0.0009 x PLsup 2.009/sup . The value of the slope b was significantly different from 3, indicating negative allometric growth (t, P < 0.05). Indo-Pacific sailfish exploitation is currently limited to the sports-recreational fishery; however, there are initiatives to promote the commercial exploitation of this resource. Therefore, results derived from this study are of importance, since they provide basic information on the biology of this species, and can serve as a baseline for the management of this resource.