TITLE

Stimulation Patterns for Erection and Ejaculation using Electroejaculator in Black Marsh Turtles

AUTHOR(S)
Suttiyotin, Sakdichod Kimskulvech Peerasak
PUB. DATE
September 2012
SOURCE
Thai Journal of Veterinary Medicine;Sep2012, Vol. 42 Issue 3, p325
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Semen collection by an electroejaculator was studied in black marsh turtles. High responses were recorded when electrical probe was inserted to the depth of 5.9±0.1 cm from the anus or 5.2±0.2 cm from posterior tip of the carapace. The depth position was approximately the center of the second carapace from the rear. The intensity of responses increased with increasing voltage and reached a plateau at 7.0 volts. The depth of the probe inserted to yield highest responses had higher relationship with carapace length when measured against the anus (r= 0.81, p= 0.0088) than the posterior end of carapace (r= 0.06, p= 0.8825). Stimulation voltages have been applied as pattern 1: 0.0 to 7.0 volts in 20 second, held for 20 second, return to 0.0 and rest 20 sec; pattern 2: 0 to 7.0 volts in 30 sec, held for 30 sec, return to 0.0 and repeat stimulus; pattern 3: 0.0 to 7.0 volts in 15 sec, held for 40 sec, return to 0.0 and rest for 5 sec. Frequencies of penile protrusion and ejaculation were similar among the 3 patterns of stimulation tested. Frequency of erection, however, was higher in pattern 2 (77.8%) than those in pattern 1 and 3 (38.9 and 50.0 %, respectively, p< 0.05). Time spent to the occurrence of penile protrusion (36.9±5.7, 25.3±4.7 and 33.4±5.6 min for pattern 1, 2 and 3 respectively, p> 0.05), penile erection (42.7±5.2, 31.7±4.5 and 35.0±5.8 min for pattern 1, 2 and 3 respectively, p> 0.05) and ejaculation (35.3± 6.4, 34.5±5.0 and 28.1±6.0 min for pattern 1, 2 and 3 respectively, p> 0.05) did not significantly differ. Ejaculations, however, were observed without penile erection. Electrical exposure times spent to achieve penile protrusion and ejaculation were not different among stimulation patterns studied. Erection, on the other hand, needed longer exposure time in pattern 3 (20.8±3.1 min) that those in pattern 1 and 2 (15.2±1.9 and 16.0±2.2 min, respectively, p< 0.05). In conclusion, electroejaculator can be used to stimulate penile erection and ejaculation in black marsh turtles.
ACCESSION #
83760977

 

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