 |
 |
|
|
 |
|
|
ผลงานตีพิมพ์ในวารสารวิชาการThe Transcription Factor Rbf1 Is the Master Regulator for b-Mating Type Controlled Pathogenic Development in Ustilago maydisผู้แต่ง: Heimel, K, Scherer, M, Vranes, M, Wahl, R,  Dr.Chetsada Pothiratana, Assistant Professor , Schuler, D, Vincon, V, Finkernagel, F, Flor-Parra, I, Kamper, J, วารสาร:  
|
|
ผลงานตีพิมพ์ในวารสารวิชาการTime Budget and Activity Patterns During the Mating Period of Flat-headed Cat Prionailurus planiceps in Captivityผู้แต่ง:Dr.Patchara Danaisawat, Assistant Professor, Piriyarom, S., Krasaeden, W., Pramkasem, S., Rurkkhum, S., Yimprasert, S., วารสาร: |
|
|
ผลงานตีพิมพ์ในวารสารวิชาการExternal morphometric and microscopic analysis of the reproductive system in in- vitro reared stingless bee queens, Heterotrigona itama, and their mating frequencyผู้แต่ง:Wongsa, K., Duangphakdee, O., Dr.Pisit Poolprasert, Assistant Professor , Dr.ATSALEK RATTANAWANNEE, Associate Professor , วารสาร: |
|
|
|
|
|
 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Mating Behavior of Hansen’s Bush Frog (Chiromantis hansenae) at Sakaerat Environmental Research Station, Northeastern Thailand) ผู้เขียน:วุฒิ ทักษิณธรรม, Virayuth Lauhachinda, ดร.บุญเสฐียร บุญสูง, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractThe infl uence of meteorological and ecological factors on the breeding of Hansen’s bush frog, Chiromantis hansenae was investigated during October 2008 to September 2009 at the Sakaerat Environmental Research Station, Northeastern Thailand. Meteorological factors (air temperature, relative humidity and rainfall) were analyzed using an ordination method. The principal component analysis output indicated a correlation between mating behavior (amplexus, laying egg behavior and advertisement calls) and termination of rainfall; however, reproduction was prolonged and lasted through the entire rainy season. While the temperature showed a signifi cant relationship with mating behavior (a higher temperature resulted in an increase in mating), humidity did not appear to infl uence the mating. In Northeastern Thailand the breeding habitat of these frogs is in ponds. Male frogs advertise from elevated branches of trees and shrubs hanging over the water body including stems of grasses around the pond. Females normally attach eggs on leaves and take care of them until the eggs hatch. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Mating Ratio, Cock Number in the Flock and Breeder Age on Fertility in Thai Native Chicken Flock) ผู้เขียน:Ratana Chotesangasa สื่อสิ่งพิมพ์:pdf AbstractTrials were conducted to determine general semen characteristics of the male native chicken and effects of mating ratio, cock number in the flock, and breeder age on fertility in the native chicken flock. The results revealed that the mature native male had the semen volume of about 0.4 ml/bird/ejaculation, spermatocrit value of about 13.86-15.60%, semen concentration of about 7031-8001 million cells/ml, and total sperm of about 2870-3200 million cells/ejaculation. The motility score and pH value were around 4- 5 and 7.7-8.4, respectively. The effect of mating ratios on fertility of the flock was not significantly different (P>0.05). The mean fertility rates measured during 35-44 weeks of (hen) age of the mating ratios of 1:7, 1:10, 1:13, and 1:16 were 88.21, 91.20, 88.20 and 79.82% ; and during 34-44 weeks of age of the mating ratios of 1:8, 1:12, and 1:16 were 84.31, 90.84, and 81.76% , respectively. The evidence which the lower trend of fertility rate occurring in the 1:16 flock disappeared after the exchange of cocks between the flocks indicated that sexual competency of the male played a major role in fertility of the breeding flock. Continuous surveillance on egg incubation results and immediate replacement of the ill with the healthy cocks wherever needed were suggested. Housing two cocks within a flock showed ambiguous influence. While it caused a decrease in fertility percentage on the 1:8 flock, it showed no ill effect at all on the 1:16 flock. Furthermore, the incidence of low fertility observed in the 1:12 flock when its sole male was ill confirmed that the high fertility of the flock depended heavily on sexual competency of the male and it could possibly have been secured if there were two cocks in the flock. The results revealed more of the benefit of housing two cocks within the same flock. The declining fertility rate of the old hens in their third year of age was greatly improved from the mean value of 58.32% for the flock with one cock to 81.20% for the flock with two cocks. For the effect of breeder age on fertility, the overall results of these experiments indicated that the native cocks aged from nine months to two years had similar fertilizing ability of about 80-90% whereas the native hens had their fertilizing ability decreased annually from about 80-90% in the first year, to about 70-80% in the second year, and 60-70% in the third year. |