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Image 9 of Progress report (Kentucky Agricultural Experiment Station) n.196

Part of Kentucky Agricultural Experiment Station

-7- characteristics lead to the conclusion that impairment of spermatogenic activity following heat stress may be caused by the reduced blood flow to the heated testis. Table 1. Mean Sperm Cell Concentration in Ram Semen Following Temporary Occlusion of Blood Flow to the Testes Weeka . . ~ After Duration of Blood Flow Occlusion Treatment 30 minuteb 1 hourb Controlc 1 2. sssd 4.06 3.94 2 1. 40 2. 78 4. 09 _ _ 3 0. 70 1. 17 4. 10 4 1. 31 O. 80 3. 65 5 1. 16 0. 84 4. 02 6 1. 24 0. 52 3. 41 7 1 . 30 1 . 15 4. 33 8 1. 58 1 . 12 4. 53 9 1. 64 1. 10 3. 81 ` 10 3 . 68 1 . 38 4. 3 6 11 3. 20 2. 49 4. 10 12 3. 26 3. 03 3. 82 _ Mean 1.92** 1.726 4.01 I E Differences among weeks are highly significant b/(P< . 01) . E/Mean of 2 observations from 2 rams. V H/Mean of 2 observations from 4 rams. 3 E/Sperm cell concentration in millions/mm . Significantly (P< . 05) lower than controls. Table 2. Percent Motile Spermatozoa in Semen from Rams Following Occlusion of the Spermatic Artery 3 Vigil; Duration of Blood Flow Occlusion Treatment 30 minuteb 1 hourb Controlc 1 60 38 57 2 35 27 69 / 3 18 5 61 V 4 20 18 60 5 47 17 60 6 32 17 55 7 32 32 64 8 47 30 65 9 40 25 55 10 60 30 60 11 65 55 65 12 63 53 57 Mean 43d 33d* 8 63 %/I Difference among weeks are highly significant (P<. O1). E/Mean of 2 observations per week from 2 rams. H/Mean of 2 observations per week from 4 rams. -5/Highly significant (P<. 01) lower than controls. Significantly (P <. 05) lower than 30-minute rams.

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