title: [Reproduction and average size at maturity of the trout Oncorphynchus mykiss (Salmoniformes:Salmonidae) in the Venezuelan Andes)].
abstract: From January 1987 to February 1988, a total of 393 rainbow trout were captured in a high mountain stream of the Venezuelan Andes (8 degrees 40'N; 71 degrees 5'W). Gonadal development was measured using the Nikolsky method. The mean size for sexual maturation was analyzed with the method of relative frequency of adults and young for each size class. Males reproduced throughout the year, while ripe females were observed only in January (11%). A half of the males was sexually mature at the minimum size of 13.40 cm SL (16.25 for females). All individuals were sexually mature at 26.40 cm (males) and 26.80 cm (females).
mesh_terms: D000818:Animals; D005260:Female; D008297:Male; D017686:Oncorhynchus mykiss / Q000502:physiology*; D011156:Population Density; D012098:Reproduction; D012621:Seasons; D012741:Sexual Maturation; D014687:Venezuela
vernacular_title: Reproducción y talla media de madurez de la trucha Oncorphynchus mykiss (Salmoniformes: Salmonidae) en los Andes venezolanos.