The reproductive biology of Ethmidium maculatum "machete" from the La Libertad region of May 2018 was studied. The sample consisted of 471 specimens obtained from artisanal fisheries in the ports of Pacasmayo, Puerto Morín and Salaverry. The gonadosomatic index, reproductive activity, spawning frequency, as well as fecundity were determined and a gonadal maturity scale was elaborated. Through the infiltration method, sex cells are seen microscopically in males and females. The highest spawning peaks are shown in the months of March and April (autumn) in both sexes. Reproductive activity and frequency of desire are presented with higher values in the summer and autumn seasons. For fecundity, the parameter that was best adjusted was the body weight of the fish with r = 0.57. Different types of sex cells were observed along the gonadota, in females five types of cells were determined: imma...

Tesis (Biólogo Pesquero).- Universidad Nacional de Trujillo. Facultad de Ciencias Biológicas. EAP de Biología Pesquera.