• Korean journal of applied entomology
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• v.58 no.2
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• pp.111-120
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• 2019

Riptortus pedestris (Fabricius) (Hemiptera: Alydidae) is an economically important insect pest of soybean and fruit trees. We investigated the temperature effects on the adult fecundity and longevity, and determined the parameters of oviposition models and life table at different constant temperatures 15.8, 19.7, 24.0, 27.8, 32.6, 34.0, and $35.5^{\circ}C$. R. pedestris females reproduced successfully from 19.7 to $35.5^{\circ}C$ except $15.8^{\circ}C$. The longevity of R. pedestris was longest at $15.8^{\circ}C$ and it decreased with increasing temperature (76.6 days at $19.7^{\circ}C$ and 20.6 days at $35.5^{\circ}C$). The number of total eggs and viable eggs was highest at $24.0^{\circ}C$ (193.5 and 151.2). Egg hatchability was highest at $27.8^{\circ}C$ (84.0%). We compared the results of oviposition models and life table parameters using both total eggs and viable eggs. The parameter value (c: the maximum reproductive capacity) (190 eggs) of temperature dependent total fecundity model using total eggs was higher than that of the model using viable eggs. When we analyzed the life table parameter the values of net reproductive rate and mean generation time using viable eggs were lower than those using total eggs. The oviposition models and life table analysis using viable eggs will be helpful to understand the real population transition of R. pedestris in agricultural system.

• Proceedings of the Acoustical Society of Korea Conference
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• 1992.06a
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• pp.189.1-196
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• 1992

복반사음은 능동소나의 운용이나 수중음향 원격탐사를 위한 기초자료로 이용된다. 여름철(9월) 천해 해역에서 실시한 고주파 음향실험 자료를 바탕으로 몇가지 복반사음 변화 특성들을 살펴보고 그 원인을 규명하고자 하였다. 실험기간중 복반사음은 거의 해저면에 의한 복반사음으로 분석되었으며, 이로부터 해저면 후방산란강도를 계산하였다.

• Proceedings of the Acoustical Society of Korea Conference
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• 1992.06a
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• pp.189.2-203
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• 1992

복반사음은 능동소나의 운용이나 수중음향 원격탐사를 위한 기초자료로 이용된다. 여름철(9월) 천해 해역에서 실시한 고주파 음향실험 자료를 바탕으로 몇가지 복반사음 변화 특성들을 사펴보고 그 원인을 규명하고자 하였다. 실험기간중 복반사음은 거의 해저면에 의한 복반사음으로 분석되었으며, 이로부터 해저면 후방산란강도를 계산하였다.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2001.11a
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• pp.277-278
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• 2001

대기 중 에어로졸은 지구표면에 도달하는 태양복사에너지를 흡수 또는 산란시키는 직접 효과 및 대기물리작용에 의한 구름의 형성 및 구름 수명에 영향을 미치는 간접 효과를 통해 지구복사 평형에 불균형을 초래함으로써 전지구적인 기후변화에 영향을 미친다. 이들 에어로졸은 온실기체와는 달리 -0.4~-3.0 W/$m^2$의 지구 평균 복사강제력을 나타내면서(IPCC, 1995) 대기 중에 냉각 효과(white- house effort)를 일으킨다(Schwartz, 1996). (중략)

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2003.05a
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• pp.380-381
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• 2003

석패과 종의 발생은 체내수정을 하며 산란시기는 계절에 따라 차이가 나는 것으로 알려져 있다 이들 종들은 아가미내에서 피면자 시기에 해당되는 유생인 글로키디움까지 발생 시기를 거친 후 유생이 체외로 방출되면 물고기 둥 수서생물에 부착하여 일정기간 기생생활을 거쳐 유패로 탈락하면서 독립생활을 하게 된다. 또한 석패과 유생의 발달과 분산의 형태는 곧 종의 수명과 지리적 분산의 중요한 역할을 하는 것으로 알려져 있다 (Jackson, 1974). (중략)

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2002.11a
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• pp.442-443
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• 2002

인공위성에 의한 대기 에어러솔의 관측방법은 에어러솔이 기후에 미치는 영향의 평가에 있어서 중요한 요소가 되었다. 기본적으로 인공위성 원격탐사자료는 가시광선 영역역대의 밴드에서 대기중의 분자들이나 에어러솔에 의한 산란효과에 의해 영향을 받는다. 황사 현상과 같은 먼지구름은 인공위성 영상에서 쉽게 보이며 이러한 먼지 구름이 복사 강제 효과에 대한 기여도가 클 것으로 예측된다. (중략)

• KOREAN POULTRY JOURNAL
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• v.54 no.10
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• pp.140-145
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• 2022

본고는 최근 미국 캘리포니아주 식품 농업부에서 가금농가의 차단방역을 위해 위험도 평가가이드(Poultry Facility BioSecurity Risk Assessment Guide)를 작성, 발표한 내용 중 산란계 분야 및 공통부문을 발췌 번역한 것이다. 본 가이드는 김상호 케이애니웰 대표가 번역하였으며, 국내 상황과 공통된 부분이 많아 AI 등 양계질병 예방을 위해 항상 노력하고 있는 양계농가에서 자체진단용으로 활용하는데 도움이 될 수 있을 것으로 본다. 음영처리된 부분은 농장에서 필수(의무)적으로 지켜야 하는 사항을 표시한 것이다.

• Korean journal of applied entomology
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• v.44 no.2
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• pp.109-114
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• 2005

This study was conducted to investigate the life cycle of Tipula latemarginata Alexander in Korea. The field surveys for the life cycle of the species were carried out at the two sites of Neaseong Stream area in Bongwha County from January 2001 to December 2002. Also many individuals of the species were reared in laboratory to investigate the life cycle. T latemarginata appeared to have three generations a year under the rearing conditions at room temperature. All the processes of life cycle of the species, when reared at room temperature from September 2001 to March 2002, were as follows: Eggs usually hatched between 4 and 10 days after oviposition. First instar larvae grew rapidly and molted to the second instar in 7-9 days. Second instar larvae spent 5-7 days for next molting and third instar period lasted approximately 8-12 days. Fourth instar larvae spent 6 weeks to 5 months for pupation. Especially the duration of fourth instar larval existence was greatly lengthened and served as the overwintering stage. The duration of pupal stage was 6-10 days. In the field, T. latemarginata also appeared to have three generations a year at the favorable habitats.

• Korean Journal of Agricultural Science
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• v.33 no.1
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• pp.17-24
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• 2006

An experiment was conducted to investigate the effects of forced molting and egg storage time on the various egg qualities. A total of 240 ISA Brown layers (60 wk of age) were employed as the unmolted treatment (Control). Two hundred and forty ISA Brown layers, molted at the age of 55 wk, were used as a forced molting treatment (T1), and the same number and strain of layers, molted at the age of 70 wk, were also used as the another forced molting treatment (T2). A total of 120 eggs were sampled from each treatment, and divided into six sets, 20 eggs per set. These six sets were stored for 1, 3, 6, 9, 12, and 15 days at $18^{\circ}C$ temperature, respectively. Eggs from T1 were collected from laying hens at the age of 68 wk, which started molting at 60 wk of age and achieved 50% egg production at 63 wk of age. Eggs from T2 were collected from hens at 82 wk of age, which started molting at 70 wk of age and achieved 50% egg production at 78 wk of age. The eggshell strength of T1 was significantly (p<0.05) higher than the Control and T2, and the storing periods did not affect the eggshell strength at all. Neither the forced molting nor the storing periods did not exert any consistent effect on the egg weight, eggshell thickness, eggshell color and egg yolk color. The albumin heights of T1 and T2 were significantly (p<0.05) lower than the Control, and it was remarkably reduced gradually as the storage periods increased in all three treatments. The Haugh unit showed very similar trends as the albumin height, indicating that both albumin height and Haugh unit were very much related to each other. In conclusion, the forced molting improves the eggshell strength, but decreases the albumin height and Haugh unit. The storage of eggs also decreases the albumin height and Haugh unit regardless of molting.

• Korean journal of applied entomology
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• v.41 no.3
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• pp.211-216
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• 2002

The present study was aimed to examine the effect of different host plants on the biological property of cotton caterpillar, outbreak pest of cucurbit vegetables. The feeding and oviposition preferences toward cucumber and pumpkin were greater than those toward watermelon, oriental melon, and melon. The periods of egg and larva fed on oriental melon, melon, and pumpkin were longer than those on watermelon and cucumber. The longest pupal period was 10.5 days from cucumber. The hatching rate, pupation rate, emergence rate, and survival rate were observed from different host plants. The hatching rate was the highest on cucumber (87.2%) and the lowest on melon (72.8%). The pupation rate on watermelon and oriental melon (90.0% and 89.1%, respectively) was higher than that on cucumber (62.0%). The emergence rate on cucumber and pumpkin (93.5% and 92.0%, respectively) was higher than that on oriental melon (78.7%). The survival rate from hatching to emergence on watermelon (76.0%) was the highest, and the lowest on cucumber (50.0%). The adult period on melon (21.0 days) was the longest, and the shortest on cucumber (15.5 days) among 5 host plants. Average number of eggs per female on cucumber (281.8 eggs) was the highest, and the least on oriental melon (96.6 eggs). The survivorship on cucumber was the longest (30 days), and the shortest on pumpkin (17 days). The preoviposition period on oriental melon and melon (3.4 days) was longer than that on watermelon (2.1 days) and mean generation time in day (T) on melon was the longest (47.2 days) though they were not significant. The net reproductive rate per generation (R$_{o}$) on cucumber, 191.3, was the highest and the highest intrinsic rate of natural increase (r$_{m}$) was observed from cucumber as 0.127. All these results suggest that the growth ana reproduction of cotton caterpillar varies depending upon the kind of host plants. The analysis of the life table revealed that cucumber and pumpkin were the favorable host plants of cotton caterpillar.