Search Result of "Mating"

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การประชุมวิชาการ

Mating Behaviour and Duration of Blue Swimming Crab (Portunus pelagicus) Under Controlled Hatchery Conditions

ผู้แต่ง:ImgMs.Wasana Arkronrat, ImgDr.Vutthichai Oniam,

การประชุมวิชาการ:

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การประชุมวิชาการ

The biology and mating behavior of an aquatic firefly species, Luciola aquatilis sp. nov. (Coleoptera: Lampyridae).

ผู้แต่ง:ImgDr.Anchana Thancharoen, Associate Professor,

การประชุมวิชาการ:

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ผลงานตีพิมพ์ในวารสารวิชาการ

Relationship between age at first mating and total number of piglet born per litter in gilts

ผู้แต่ง:ImgRoongsitthichai, A., ImgDr.Seri Koonjaenak, Assistant Professor, ImgTummaruk, P.,

วารสาร:

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : A Study on the Rate of Mating Success and the Age of Egg-laying of the Queens of the European Honey Bee (Apis mellifera L.) Reared in Beekeeping Area in North Thailand. )

ผู้เขียน:Imgดร.พงศ์เทพ อัครธนกุล, รองศาสตราจารย์

สื่อสิ่งพิมพ์:pdf

Abstract

Queens of the European honey bee Apis rnellifera L. were reared at S.P. Apiary located in the province of Chiang Rai during September - November 1982. From 215 queens raised for the experiment, 168 queens mated successfully and returned to the mating nuclei. Only one queen did not mate. The mating success was 78% which was in the normal range of the rate of success in commercial queen rearing operation in the temperate region i.e. in the U.S. Altogether 46 queens (21.4%) were lost. This was probably due to the present of predator hornets and insect-eating birds within the vicinity of the apiary. Egglaying of the mated queens commenced when the queens were 7 - 14 days old. The majority of the mated queens (80.4%) started to lay eggs when they were between 9 - 12 days old. Again, the age of egglaying of the queens raised for the experiment was within the same range of that of A. rneZZifera queens produced in the temperate.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 019, Issue 1, Jan 85 - Apr 85, Page 20 - 25 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Mating Ratio, Cock Number in the Flock and Breeder Age on Fertility in Thai Native Chicken Flock)

ผู้เขียน:ImgRatana Chotesangasa

สื่อสิ่งพิมพ์:pdf

Abstract

Trials 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.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 035, Issue 2, Apr 01 - Jun 01, Page 122 - 131 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Mating Behavior of Hansen’s Bush Frog (Chiromantis hansenae) at Sakaerat Environmental Research Station, Northeastern Thailand)

ผู้เขียน:Imgวุฒิ ทักษิณธรรม, ImgVirayuth Lauhachinda, Imgดร.บุญเสฐียร บุญสูง, รองศาสตราจารย์

สื่อสิ่งพิมพ์:pdf

Abstract

The 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.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 046, Issue 6, Nov 12 - Dec 12, Page 862 - 870 |  PDF |  Page 

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ที่มา:การประชุมวิชาการข้าวโพดและข้าวฟ่างแห่งชาติ ครั้งที่ 36

หัวเรื่อง:Mating type ชนิดใหม่ของ Exserohilum turcicum ในประเทศไทย

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