• 한국전통조경학회지
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• 제41권4호
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• pp.40-48
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• 2023

본 연구는 국내 서·남해안 도서(島嶼) 및 연안 지역을 번식의 근거지로 활동하는 조류와 관련한 번식지 적합성 지수 개발을 위한 기초연구의 일환으로, FGI(Focus Group Interview)와 AHP(Analytic Hierarchy Process) 분석을 실시하였으며, 그 결과는 다음과 같다. 첫째, 연안성 조류 번식지 적합성 가치 판단 결과 자연적 가치(0.763)가 인위적 가치(0.237)에 비해 높은 중요도를 나타냈다. 번식공간의 지속적 완전성 담보를 위한 '보호구역 지정여부'를 제외한 다른 인위적 가치는 하위순위로 파악되었다. 둘째, 2차례 진행된 FGI에서 분류된 25개의 평가항목을 상위개념으로 재정립한 결과, 자연적 가치가 9개, 인위적 가치가 5가지, 총 14개로 최종 선정되었다. 셋째, 연안성 조류 번식지 적합성 중요도의 중분류 평가 결과는 '생태적 가치(0.392)', '지형적 가치(0.251)', '소극적 간섭(0.124)', '지질적 가치(0.120)', '적극적 간섭(0.113)'의 순서로 파악되었다. 이는 번식공간 자체의 수용적 환경보다는 번식을 위한 생존환경에 우선한 것으로 판단된다. 넷째, 연안성 조류 번식지의 평가항목 우선순위 결과는 '식생분포(0.187)', '갯벌의 면적(0.118)', '갯벌의 유무(0.092)', '천적의 출현(0.087)', '보호구역 지정여부(0.08)', '섬 면적(0.069)', '과번식에 의한 황폐화(0.064)', '토양 구성비(0.056)', '육지와의 거리(0.054)', '해양 양식장 면적(0.045)', '경작지 면적(0.041)', '경작 행위(0.038)', '표면의 각도(0.036)', '토지이용(0.033)'의 순으로 나타났다. 본 연구에서 도출된 평가항목의 가중치 결과값은 연안성 조류 번식지 공간에 집중한 우선순위 평가에 활용이 가능할 것으로 판단된다. 그러나 조류 개체가 갖는 고유의 서식지 적합성과의 상관성 여부는 보완이 필요한 것으로 보이며, 추후 종별특성을 접목한 공간분석연구는 추후 과제로 남기고자 한다.

• Asian-Australasian Journal of Animal Sciences
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• 제11권2호
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• pp.117-120
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• 1998

Relationships of breeding values of sires for first lactation milk yield with pedigree information or indices were examined to identify the optimal criteria of selecting young dairy bulls for future use in artificial insemination (AI). Records of performance data on 1087 crossbred daughters (Holstein - Friesian, Jersey and Brown Swiss with Hariana) of 147 sires, generated at Livestock Production Research (Cattle and Buffaloes) Farm, IVRI, Izatnagar, U.P., during 1972 - 1995 were used to obtain the estimates of sire's breeding values (EBV) using the Best Linear Unbiased Prediction Procedures. The correlations between young bull's EBV and the dam's first lactation milk yield was non-significantly different from zero. However, the young bull's EBV was negatively and significantly related (r = - 0.275 ; P < 0.05) to the dam's best lactation milk yield, suggesting that the selection of young dairy bulls from high yielding elite dams is not a suitable criteria for genetic improvement. The correlations of sire's and paternal grandsire's EBV's with young bull's EBV were high and positive (0.532, 0.844; P < 0.01). The maternal grandsire's EBV was positively but non-significantly related to grandson's EBV. The pedigree index incorporating dam's milk records and sire's EBV's showed a negative and non-significant correlation with young bull's EBV. However, the correlation of a pedigree index $(I_3)$ combining information on sire's and paternal grand-sire's EBV's with young bull's EBV's was considerably high and positive (0.797; P < 0.01). The regression coefficients of young bull's EBV on pedigree index $I_3$, was higher than those on other pedigree information. These results revealed that there was no advantage in basing selection on dam's performance or maternal grand-sire's EBV and that sire's and paternal grandsire's EBV's were reliable pedigree information for selection of young dairy bulls for future use in AI.

• 한국수산과학회지
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• 제9권1호
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• pp.61-68
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• 1976

전복의 조기채묘기술개발을 위하여 전복의 생식소 조기성숙에 관여하는 요인과 채란성적을 생태적입장에서 조사검토하였다. 수온조절, 광주기조절, 단순사육등의 실험구 배치를 한 4개의 실내사육 수조와 해중에 수하한 축양용 대바구니를 사용하여 1975년 4월 24일부터 6월 23일까지 60일간 인공사육한 한전복과, 충무시 앞바다의 죽도에서 채포한 자연산 한전복을 모패로 사용하며, 동년 6월에 산란유발하여 그 채란성적을 비교 고찰하였다. 1. 한전복 생식소 성숙에 관여하는 생태적 요인은 수은보다 조도환경이라고 보아진다. 2. 낮의 최대 조도가 2,000lux이하의 어두운 수로에서 60일 이상 모패를 사육함으로써 좋은 성적으로 조기채묘가 가능했다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2017년도 춘계학술대회
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• pp.563-566
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• 2017

축산업에서 가축의 질병을 예방하고, 고품질의 축산 상품을 최대한으로 생산하기 위해서는 가축이 사육되는 축사의 환경을 최적의 상태로 관리할 필요가 있다. 오늘날 가축이 사육되는 환경을 개선하고 관리하고자, 공기 환경, 사육 환경 등 각각의 요인들과 가축의 생체 간 수치적 규칙을 해석하는 가축의 생육 모델 관련 연구가 진행되고 있다. 그러나 종래의 생육 모델로는 공기 환경과 사육 환경을 복합적으로 분석하고 해석하여, 축사에서 복합 환경을 제어하기 위한 의사 결정을 지원하기에는 미흡하다. 따라서 본 고는 축적된 생체 정보, 공기 환경, 사육 환경 및 생산 정보를 기반으로, 인공신경망을 이용한 복합 환경과 가축의 생체 간 계량적 모델을 생성하여 소프트웨어 기반으로 축사의 복합 환경을 제어할 수 있는 방안을 제시하고자 한다.

• Asian-Australasian Journal of Animal Sciences
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• 제32권8_spc호
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• pp.1284-1295
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• 2019

Considerable progress in reproduction of dairy goats has been made, with advances in reproductive technology accelerating dairy goat production since the 1980s. Reproduction in goats is described as seasonal. The onset and length of the breeding season is dependent on various factors such as breed, climate, physiological stage, male effect, breeding system, and photoperiod. The reproductive physiology of goats was investigated extensively, including hypothalamic and pituitary control of the ovary related to estrus behavior and cyclicity etc. Photoperiodic treatments coupled with the male effect allow hormone-free synchronization of ovulation, but the kidding rate is still less than for hormonal treatments. Different protocols have been developed to meet the needs and expectations of producers; dairy industries are subject to growing demands for year round production. Hormonal treatments for synchronization of estrus and ovulation in combination with artificial insemination (AI) or natural mating facilitate out-of-season breeding and the grouping of the kidding period. The AI with fresh or frozen semen has been increasingly adopted in the intensive production system, this is perhaps the most powerful tool that reproductive physiologists and geneticists have provided the dairy goat industry with for improving reproductive efficiency, genetic progress and genetic materials transportation. One of the most exciting developments in the reproduction of dairy animals is embryo transfer (ET), the so-called second generation reproductive biotechnology following AI. Multiple ovulation and ET (MOET) program in dairy goats combining with estrus synchronization (ES) and AI significantly increase annual genetic improvement by decreasing the generation interval. Based on the advances in reproduction technologies that have been utilized through experiments and investigation, this review will focus on the application of these technologies and how they can be used to promote the dairy goat research and industry development in the future.

• 한국수정란이식학회지
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• 제26권4호
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• pp.271-276
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• 2011

This study was focused on improvement of milk production in Mongolian dairy industry by artificial insemination (AI) technology, supported by ODA of KOICA in Republic of Korea. This program was started in January 2009 and it is in $3^{rd}$ years. This manuscript summarized the data especially on estrus synchronization and pregnancy establishment in dairy cows (Holstein) this year. A total of 81 dairy cows from 4 private farms (38 from Undarmal milk and that of 30, 8 and 5 dairy cows from Onjin (Enkhbayer), Jargalant, and BRM School farms respectively) were synchronized with 5 ml Lutalyse (i.m.) in the dump of dairy cows and then estrus was detected 2 to 3 days after $PGF_{2{\alpha}}$ injection. The synchronized dairy cows were inseminated with 0.5 ml dairy frozen semen by conventional artificial insemination (AI) techniques. Pregnancy was diagnosed about 60 days after AI by palpation method. About 96.3% (78/81) of synchronized cows were responded to single $PGF_{2{\alpha}}$ injection. Total 75 over 78 dairy cows (90.1%) inseminated were diagnosed as pregnant. The estrus induction and pregnancy rates were very effective using Lutalyse injection and conventional AI techniques in Mongolian dairy cow. The present results indicated that AI after estrus induction in Mongolian dairy cows could be applied to dairy breeding technology for improving breeding efficiency and milk production of the country.

• Asian-Australasian Journal of Animal Sciences
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• 제15권3호
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• pp.326-329
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• 2002

A population of exotic Holstein Friesian, Jersey, their crossbreds and the indigenous Murrah breed of buffalo bulls (n=486), used in artificial insemination breeding program were screened for the allelic distribution of the ${\kappa}$-casein and ${\beta}$-lactoglobulin genotypes. The preferred "B" allele frequency was highest in Murrah buffalo bulls followed by Jersey and Holstein Friesian. The increase in this particular allele frequency in the Holstein Friesian crossbred bulls was more when compared to their Jersey counterparts. Hardy-Weinberg's equilibrium was maintained albeit with some deviations, which was higher in crossbreds than in purebreds. The feasibility of using such large-scale molecular diagnostic tools in the field and their significance with regards to the dairy economy is discussed.

• 한국동물번식학회:학술대회논문집
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• 한국동물번식학회 2004년도 춘계학술발표대회
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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)

• 한국잠사곤충학회지
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• 제37권2호
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• pp.235-243
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• 1995

Recently, the cocoon production is reducing very steeply in Japan. The main reason for this cocoon reduction is due to high labor cost and the production expense is apt to rise year by year. Accordingly, the improvement of cocoon productivity by retrenchment of the production expense is intensively required in my country. Therefore, the silkworm rearing on the artificial diet is largely expected as the innovation techniques of sericulture. Since rearing of the silkworm on artificial diets has first been achieved in 1960, and the silkworm larvae were reared throughout all the instars on artificial diets(Fukuda et al., 1960, Ito & Tanaka, 1960). The artificial diets used at this time contained 50% or more of dried, pulverized mulberyy leaves as one of the main ingredients, and the composition was rather simple. When reared on these diets, larval growth and development were retarded, small cocoons appeared, and the adults laid only a small number of eggs. At first, we would like to study about nutritional requirement of the silkworm, using the chemically defined diet which prepared artificially. Subsequently, attempts were made to improve the diets by replacement of crude ingredients with possibly purer compounds, as mentioned later. Before giving the details on individual nutrient, I would like to summarize about the outline of utilization flow of various nutrients through the larval-pupal development and these daily quantitative requirements per body weight in the silkworm when they were reared on mulberry leaves.

• Journal of Animal Science and Technology
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• 제62권6호
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• pp.777-789
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• 2020

Intense artificial selection has been imposed to Luzhong mutton sheep population in the past years. Improvements on growth and reproductive performance are two breeding goals in the present herd. Although some progresses were phenotypically observed possibly due to inbreeding induced by strong selection in terms of these traits, the genomic evaluation was poorly understood. Therefore, a high-density SNP array was used to characterize the pattern of runs of homozygosity (ROH), estimate inbreeding and inbreeding depressions on early growth performance and litter size based upon ROH, and scan positive selection signatures of recent population. Consequently, a low inbreeding level was observed which had negative effects on litter size, but not on early growth performance. And 160 genes were under selection, of which some were reported to be linked to several traits of sheep including body weight, litter size, carcass and meat quality, milk yield and composition, fiber quality and health, and the top genes were associated with growth (growth hormone [GH]- growth hormone receptor [GHR]- Insulin-like growth factor 1 [IGF1] axis) and litter size (bone morphogenic proteins [BMPs]-associated). The effectiveness of previous breeding measures was highlighted, but purging selection was proposed to alleviate the inbreeding depression on litter size, providing some genomic insights to breeding management of Luzhong mutton sheep.