Acondicionamiento del Chame Dormitator latifrons (Richardson 1844) para su inducción al desove en laboratorio

Abstract

This research was carried out in the facilities of the Technical University of Manabí, School of Aquaculture and Fisheries during the months of February to November of 2018, with the objective of conditioning chame reproducers Dormitator latifrons (Richardson 1844) with different diets for his gonadal maturation in the laboratory. The reproducers were obtained from different sites in San Isidro, Chone and Tosagua. During the conditioning process part of the organisms were subjected to curative treatments with oxytetracycline, lithofloxin, cypro-plus, piperazine, enrofloxacin and neguvon as they had bacterial lesions. There was greater susceptibility in male organisms with 54.17%, however, survival was excellent with 92%. After overcoming the quarantine, 2 protein treatments (28% and 35% protein) were applied to achieve gonadal maturation of females and males, each with 2 replicas. At the end of the crop there was no increase in body weight in any treatment having a decay of 21.57 g for females fed the diet of 35% and 15.83 g in those who were fed with 28% protein. In the males fed 35% protein there was a loss of 13.43 g and with the diet of 28% the loss was 14.81 g. During a period of 3 months of control of the feeding variables in this study for females and males of D. latifrons maintained on a diet of 35% and 28% did not present an increase in weight and height, with an apparent reabsorption of the gonadal tissue. The recorded data of physical and chemical parameters (temperature, oxygen, pH and ups) were kept within the optimum cultivation ranges for D. latifrons throughout the investigation.