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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/2461

Title: STUDY ON THE SURVIVAL AND REPRODACTIVE PERFORMANCE OF STERILE MALE GLOSSINA PALLIDIPES (DIPTERA: GLOSSINIDAE) AT KALITY TSETSE FLY REARING AND IRRADIATION CENTER, ADDIS ABABA.
Authors: TADESE, SETEGN
Advisors: Dr. Emiru Seyoum
Keywords: Biology
Copyright: Jun-2010
Date Added: 4-May-2012
Publisher: AAU
Abstract: Laboratorical investigation were conducted to know the effect of irradiation (sterility) on reproductive performance of females G. pallidipes mated with sterile and fertile males under temperature of 23-25 oC and 75-80% relative humidity. Completely randomized designs with three replications were followed throughout the experiments. The irradiation effects on male G. pallidipes at different doses of irradiation were checked using, 60Gy, 80Gy, 100Gy and 120Gy. Results showed that at highest doses the sterility effects on male Glossina pallidipes were significantly lower than lowest doses (P< 0.05) on pupae production and emergence of adults. On the other hand, the highest dose (120Gy) caused abortion of egg/larvae significantly higher than the lower dose (60Gy) (P< 0.05). In other investigation which was aimed to assessing the competitiveness of sterile males to fertile males in a cage at ratios of 9 sterile: 1 fertile males, 7 sterile to 3 fertile males, 5 sterile to 5 fertile males and 3 sterile to 7 fertile males, the results showed that the ratio with the highest number of sterile (9: 1) in the cage caused significantly low number of pupae and number of adults emerged from pupae than those with lower number of sterile males (3: 7) (P< 0.05). Similarly, the ratio with the highest sterile males (9: 1) resulted in significantly higher number of egg/larvae abortion than those with lower number of sterile males (3: 7) ratio (P< 0.05). In the present study, survival of male G. pallidipes irradiated with 120Gy three days after emergence from pupae was significantly higher than males irradiated one and ten days after emergence from pupae (P< 0.05). This may indicate that irradiated males may need to rest up to 7 or 10 days before released to the field. The importance of sterilization using appropriate dose, the appropriate ratio of sterile to fertile males and the time at which sterility was done efficiently all are relevant.
URI: http://hdl.handle.net/123456789/2461
Appears in:Thesis - Biology

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