The Pacific jack Caranx caninus is a common species fished by artisanal fishermen off the coast of Colima, México. During 2002, monthly samples of morphometric data and otoliths were taken to determine age and growth. Seven age groups were identified. The highest growth, 14.4 cm, takes place during the first year of life. During the second year, C. caninus grows 11.76 cm; the third year 9.61 cm; the fourth 7.85 cm; the fifth 6.41 cm and sixth year 5.24 cm. The constants of von Bertalanffy´s growth equation were: L ∞ = 83.26 cm, W ∞ = 18.138 g, K = 0.202, t o =-0.283 and A 0.95 = 15 years. Growth curves of other species of the same genus were calculated in order to compare them with the one obtained in the present work. The gonadosomatic index presented higher values during November and May. The periods of more intensive feeding are from August to

This paper deals with the growth and mortality analysis of the burrito grunt A n i s o t remus interru p t u s on the coast of Colima, México. The estimated growth parameters are: L¥ = 50.59 cm; W¥ = 5,051.04 g; k = 0.147 years- 1; to = -0.916 years; A0 . 9 5 = 19.46 years. Most of the growth occurred during the first year of life, when the grunt grows 12.52 cm, the second year it grows 4.95 cm and the third, 4.60 cm. The highest value of the condition index took place between February and September. The total mortality rate (Z) was calculated as 0.53 years- 1. These values are basic for the plan of administration of the fishery of this species.

Morphology, morphometry and growth rings of the otoliths: Sagitta, asteriscus and lapillus of Centropomus robalito Jordan and Gilbert 1882 in Cuyutlan lagoon, Colima, Mexico were studied. Samples were taken from October 2015 to September 2016. Differences between sexes, as right and left of the three pairs of otoliths were analyzed. In all cases the growth of the otoliths was eccentric to the core. The relationship between total length of the fish and length of the sagitta showed that this structure is suitable to determine the age of this species. Nine growth rings were identified on sagittae. The identification of growth rings was carried out only in sagittae. Data on lengths obtained by polymodal curves of C. robalito were compared to the present results.

Con un muestreo intensivo diario de la actividad pesquera artesanal de Manzanillo, Colima (México), de febrero de 1992 a abril de 1993, se recopiló información sobre diferentes aspectos del sistema de Palabras clave: pesquería ribereña, esfuerzo de pesca, serie de tiempo, regresión lineal múltiple.