• Journal of Embryo Transfer
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• v.25 no.1
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• pp.85-87
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• 2010

A necropsy of a primiparous, 4-year-old, Himalayan tahr (Hemitragus jemlahicus) was performed in September 8, 2009. Typical appearances of ovaries, oviducts, uterine horns, cervix and caruncles were well shown. Five cervical folds were present in the cervix. Cervical opening can be reached in the length of less than 15 cm from the entrance of vagina. Development of two follicles was found in the left ovary even though breeding season of this species naturally starts in late November. The reproductive organs of a primiparous, 3-year-old, Corriedale sheep showed that differences in the length and morphological appearance of cervix exist between two species. Comparative understanding of reproductive systems in Himalayan tahr and Corriedale sheep could help advancing assisted reproductive technologies in feral goats.

• Proceedings of the KSAR Conference
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• 2002.06a
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• pp.81-81
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• 2002

The deer was inseminated at the breeding season, which only shows appearance of the estrus cycles. Early diagnosis of pregnancy is very useful to select non-pregnant does and also very important to decide re-inseminations or mating for producing of calves. Therefore, for the development of techniques on the early diagnosis of pregnancy of deer, the results of this study were summarized as following. (omitted)

• Korean Journal of Veterinary Pathology
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• v.1 no.1
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• pp.61-65
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• 1997

Epizootic streptococal infction is one of the common disease in guinea pig. We have confirmed 54 case of epizootic streptococal infection in guinea pig by histopathology and epidemiology. Grossly infection is characterized by the presense one to several enlarged lymph nodes particularly of the mandible cervical lymph nodes and accompanied by pleuropneumonia. Histologically there were lymphadenitis with abscesses surrounded by loose connective tissue fibrinopurulent pneumonia pleuritis myocarditis pericarditis and peritonitis. Epidemiological survey revealed that mortality was high in young adult female(15.1%) and changeable weather season such as spring and fall. From findings it was suggested that epizootic streptococal infection of guinea pig begin to infect in breeding colony around weaning period and died from that infection at animal facility during the quarantine period.

• Journal of Veterinary Clinics
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• v.15 no.2
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• pp.358-363
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• 1998

These studies were performed to investigate what genital diseases could be diagnosed by ultrasonography in the mares associated with infertility. Of 159 thoroughbred breeders(4 to 18 years old), 31 mares which had been considered as the mares with reproductive disorders were examined by ultrasonography during the breeding season. 1. Hematoma in ovarian disordersl endometritis and pyometra in uterine disorders could be diagnosed by ultrasonography. 2.The rate of infertility was 19.5% out of 159 breeders and the rate of uterine disordres was 71.0% among the whole reproductive disorders. 3.Of 31 mares considered as the mares with infertilityi 26 mares were diagnosed by ultrasonography denoting 83.9% of diagnosis rate. 4.The highest average age of mares among the mares with reproductive disorders was 11.7 years in the mares with uterine disorders. The average age of the mares diagnosed as concepted was 7.5 years, which was much lower than that of the mares with reproductive disorders.5.Crushing one of twin vesicles was confirmed by ultrasonography. In conclusions ultrasonography was feasible for diagnosis of the mares with reproductive problems.

• The Korean Journal of Malacology
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• v.11 no.2
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• pp.147-163
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• 1995

The unionid family Unionidae contains several genera in Korea, among which occru considerable variations in life histories and sexual conditions. Seven species from the Korea(Anodonta arcaeformis flavotincta, A. woodiana, Unio douglaseae, U. douglasiae sinuolatus, Lamprotula gottschei, Lanceolaria acrorhyncha, Solenaia triangularis)were stueide in order to identify and describe the seasonal gonadal activity and the visceral sex. The gonads of seven species were histologically examined by using the paraffin block technique for sectioning. All seven species were uniformly dioecious and testicular activity in six species except one species, S. triangularis, generated sperm-morulae(multinucleated cell). The annual reproductive cycle of the seven species could be classified into five successive stages; multicative, growing, mature, spent, deginerative and resting stages. The breeding season of six species was the summer and that of A. a. flavotincta was the winter.

• Proceedings of the Zoological Society Korea Conference
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• 1995.10a
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• pp.68-73
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• 1995

Most female Great Tits lay one egg each day until the clutch is complete. However, some exceptions are found. “Pause day/s” most frequently occur after the 1st egg is laid. In general, egg-size increase with laying sequence, but there is year-to-year variation. The relationship between egg size and laying sequence is found more significantly in relatively larger clutches than in smaller ones. Great Tits tend to advance the hatching of their chicks by starting to incubate earlier in relation to clutch completion as the breeding season progresses. hatching asynchrony affects chick´s growth rate, but when the effect of laying date on hatching asynchrony is controlled, the effect of hatching asynchrony on growth rate is not found. These findings support the ´hurry-up´ hypothesis.

• Proceedings of the KSAR Conference
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• 2004.06a
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• pp.249-249
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• 2004

This study was conducted to investigate optimal insemination timming as a scanning changes of follicular development by synchronization of ovulation(Ov-synch.) treatment for timed artificial insemination of deer. Sixty-nine elk does were inserted CIDR into virginia for 14 days from 16 to 29 September(breeding season). (omitted)

• Journal of Wetlands Research
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• v.18 no.4
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• pp.350-356
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• 2016

The biggest factor in the success of breeding animals is selection of foods, which is determined by quality and quantity of habitats(Newton, 2003), in the case of This high biomass wetlands as an indicator of ecosystem function about Common Kestrel's choice of hunting area is expected to be an important clue of quality and quantity of habitats. For this study, it is divided into four types(Glasslands, Paddy fields, Dry fields, Rparian land) about Common Kestrel's hunting area in Yugu-eup, Gongju-si, Chungcheongnam-do, Recorded the behavior of Common Kestrel for three years during the breeding season from March to June(2014~2016). Result of investigation, hunting area showed a high hunting behavior in riversides and flight-hunting was frequently investigated from may to June. In addition flight-hunting's main food acquisition is mammal(the vole), while perching behavior's main food acquisition is insect according to the fact flight-hunting were mainly done in riversides, perching behavior were highly investigated than flight-hunting at glasslands and paddy fields and dry field. Hunting spot's coverage rate of plants covering the ground showed differences depending on hunting areas, but height of plants were not significant. Height of the plant according to hunting methods of flight-hunting to catch mammal(vole) was analyzed to prefer lower height than perching behavior Based on these results riversides are considered as a very important environmental factors for Common Kestrel's prey selection in breeding session.

• Journal of Sericultural and Entomological Science
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• v.50 no.1
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• pp.1-4
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• 2012

A new silkworm variety "DaeBakJam" for spring rearing season is F1 hybrid between Jam155, a japanese race bred from introduction breeding and Jam156, a chinese race from introduction breeding. In the local adaptability test performed at 8 local areas in spring of 2010, the hatchability rate of DaeBakJam was recorded 96% similar to DaePoongJam. The larval period was 3 hour shorter than DaePoongJam. The pupation percentage was recorded 0.2% higher than DaePoongJam. Single cocoon weight (2.72 g) and Cocoon yield (25.4 kg) was higher than DaePoongJam. The concentration of DNJ was measured 3.28 mg in DaePoongJam, lower than DaePoongJam (3.48 mg). Test of the artificial diet of DaeBakJam showed bad adaptability of the artificial diet for larval period from 1st to 3rd, but KumOkJam showed excellent adaptability of the artificial diet. In the Paecilomyces tenuipes production ability test, the pupal weight of DaeBakJam was 1.69 g/individual, higher than DaePoongJam (1.59 g/individual).

• Journal of Sericultural and Entomological Science
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• v.46 no.2
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• pp.54-57
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• 2004

A new silkworm variety "Buhungjam" for autumn rearing season is $F_1$ hybrid between Jam149, a japanese race bred from introduction breeding and Jam150, a chinese race from introduction breeding. Jam149, japanese parent of the "Buhungjam" showed high GCA in pupation percentage, cocoon shell percentage and filament length and Jam15, chinese parent showed high GCA in cocoon shell percentage and cocoon filament length. In the local adaptability test performed at 8 local areas in spring of 2003, Buhungjam records 7% higher in cocoon yield and 8% in raw silk yield than the check variety, Daesungjam.