• 한국환경과학회지
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• 제28권8호
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• pp.645-654
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• 2019

This study was conducted in two breeding seasons in 2017 to identify nesting habits and breeding biology of barn swallows in Daejang-dong village, Bucheon city, suburban Seoul. Among the 77 barn swallow nests studied, there were 34 breeding nests -27 in the first and 12 in the second. The reuse rate of old nests was 51.6%. In addition to tile-roofed houses (20.6%), breeding nests were most common in brick houses (38.2%) and in slate-roofed houses (26.5%). Most breeding nests were in eaves (58.8%) and front doors (32.3%). The average clutch size was $4.8{\pm}0.9$ in the first and $4.3{\pm}0.5$ in the second. The breeding success rate was 75.0% in the first and 58.1% in the second, considering the hatching rate and the fledgling rate. It was found that the rainy season was affected by a lack of food. At least 27 pairs of nestling barn swallows and 127 young barn swallows successfully fledged were estimated to be 181. These results show that Daejang-dong village is an important suburban habitat of the Seoul metropolitan area, and that it can be used to verify the environmental conservation value of rice fields of in the Seoul metropolitan area.

• 수산해양교육연구
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• 제29권2호
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• pp.409-414
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• 2017

Effects of human chorionic gonadotropin (HCG) on ovulation and spawning of the grass puffer, Takifugu niphobles, were investigated. Matured females spawned successfully by all doses of HCG. Spawning usually occurred 24 hours after hormone injection. Body weight of adult, gonadsomatic index (GSI), pseudo-GSI, body weight of spawned egg, success rate of spawn, fertilization rate, hatching rate, and survival rate of juvenile were correlated with increasing HCG doses. However, abnormal rate of juvenile was not correlated with increasing HCG doses. These results should be useful for developing aquaculture program of grass puffer.

• 생태와환경
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• 제34권4호통권96호
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• pp.337-341
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• 2001

왜몰개, Aphyocypris chinensis의 산란에 미치는 수온의 영향을 알아보기 위하여, 19, 22, 25, $28{\circ}^C$ 수온에서 2개월 동안 사육을 하면서 산란횟수, 생산된 총 수정란 수, 산란간격 및 부화율 등을 조사하였다. $19{\circ}^C$와 $25{\circ}^C$사이에서는 수온이 증가하면 할수록 산란횟수, 생산된 총 수정란 수 및 수정란의 부화율이 증가하여 $25{\circ}^C$에 노출된 암컷과 수컷에서 가장 많은 산란횟수, 난 생산 및 부화성공률과 가장 짧은 산란간격을 나타냈다. 그러나 $28{\circ}^C$에서는 $25{\circ}^C$보다 수온이 증가했음에도 오히려 4개의 실험수온 중에서 가장 적은 산란횟수, 난 생산 및 부화율과 가장 긴 산란간격을 나타냈다.

• 한국어병학회지
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• 제26권1호
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• pp.11-17
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• 2013

The cadmium (Cd) toxicological effects on the fertilized eggs, embryos and larvae were investigated in olive flounder, Paralichthys olivaceus water-borne exposed to Cd. The survival rate and hatching success of the embryos significantly diminished in treated groups in dependence of the Cd concentration. Significant differences were found at ${\geq}30{\mu}g\;L^{-1}$ exposed groups compared to the control group. A significant increase of malformation of the embryo was observed at ${\geq}20{\mu}g\;L^{-1}$ exposed groups. They usually include such symptoms as clouded yolk-sac abnormality, fin erosion and spinal curvature. A significant reduction in the survival rate of the larvae was observed in ${\geq}20{\mu}g\;L^{-1}$ exposed groups with accompanied by the disorder. Notably, in larvae, a concentration as low as $10{\mu}g\;L^{-1}$ exposed groups caused significant elevated abnormalities that is incidences of spinal cord deformation, abnormal eyes, deformation of the head region and severe developmental delay.

• 한국환경생태학회지
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• 제27권6호
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• pp.666-675
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• 2013

이 연구는 2009년 3월에서 2012년 7월까지 한라산에 설치한 인공둥지에서 번식하는 박새류(Titmouse)의 고도변화에 따른 번식생태학적 특징을 밝히기 위하여 이루어졌다. 박새류의 최초산란일은 고도가 높아짐에 따라 늦어지는 양상을 보였고, 고도상승에 따른 기온감소가 최초산란일에 영향을 미치는 것으로 나타났다(p<0.05). 결과를 종합해보면, 번식기(4~6월)의 평균기온과 산란일 간에는 유의한 상관을 보이지는 않았다(p>0.05). 인공둥지 이용률은 지역과 연도별 차이는 없었으나 박새(Parus major)와 곤줄박이(Parus varius) 두 종간에는 차이가 있는 것으로 나타났다. 한배산란수는 종간에 차이가 있었으나(p<0.05) 고도와 연도별 차이는 없었다(p>0.05). 부화성공률, 이소성공률, 번식성공률은 각각 2011년 67.3%, 99.5%, 67.0%이었고, 2012년에는 71.3%, 96.8%, 69.0%로 이소성공률은 높았고, 부화성공률과 번식성공률은 비슷하게 나타났다. 고도 차이에 따른 기온의 변화가 번식시기에 영향을 미치는 것은 확인되었으나 다른 번식생태학적 특성과의 상관관계는 확인할 수 없었다. 따라서 고도에 따른 기온변화가 박새류의 번식에 미치는 영향을 보다 명확하게 밝히기 위해서는 미기후요인과 먹이원 등의 조사를 통한 장기적인 연구가 필요할 것이라 판단된다.

• Ocean and Polar Research
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• 제38권4호
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• pp.303-314
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• 2016

We tested the combined effects of increased partial pressure of $CO_2$ ($pCO_2$) and temperature on the reproduction and survival of the copepod Calanus sinicus from Asan Bay, the Yellow Sea under laboratory conditions to understand the impact of acidification on copepods. Egg production rate, survival rate, and fecal pellet production of C. sinicus were not affected by 1305 ppm $pCO_2$ or with combined treatments of temperature and $pCO_2$, including $8^{\circ}C$ and 289 ppm $pCO_2$ (ambient), $8^{\circ}C$ and 753 ppm $pCO_2$ (high $pCO_2$), $12^{\circ}C$ and 289 ppm $pCO_2$ (high temperature), and $12^{\circ}C$ and 753 ppm $pCO_2$ (greenhouse), for 5 or 10 d of exposure. However, egg hatching success of C. sinicus decreased significantly in the greenhouse treatment compared with the ambient or the high $pCO_2$ treatments. These results suggest that a combined treatment ($pCO_2$ and temperature) affected egg viability more than a single treatment($pCO_2$).

• 한국응용곤충학회지
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• 제58권4호
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• pp.335-339
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• 2019

뽕나무깍지벌레는 장미과에 속하는 과수의 주요 해충이다. 뽕나무깍지벌레의 산란 및 부화특성과 복숭아 및 매실의 깍지벌레 방제용으로 등록된 살충제 10종(디노테퓨란 입상수화제, 벤퓨라카브 입상수화제. 피리플루퀴나존 입상수화제, 클로티아니딘 입상수용제, 뷰프로페진 수화제, 뷰프로페진+이미다클로프리드 액상수화제, 뷰프로페진+에토펜프록스 입상수화제, 뷰프로페진+티아클로프리드 액상수화제, 벤퓨라카브+뷰프로페진 유제)의 살충제 감수성을 조사였다. 뽕나무깍지벌레의 1세대 부화시기와 부화율을 조사한 결과 5월 초에 가장 많이 발생해서 약 14일 정도 연속적으로 부화하였다. 부화율은 77.7% 였으며, 월동 암컷 성충 1개체의 평균 총 산란수는 58.7개, 평균 부화약충수는 45.7마리였다. 시험에 사용한 살충제 10종 모두에서 100%의 부화 약충 살충효과가 나타났으며 이는 약충 부화시기에 맞추어 약제를 살포하면 효과적으로 방제가 가능한 것을 시사한다.

• Toxicological Research
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• 제14권3호
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• pp.379-384
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• 1998

Endocrine disruptor is an exogenous substance that changes endocrine function and causes adverse effects at the level of the organism, its progeny, and/or (sub)populations of the organisms. Purported adverse effects are cancers, declines in reproductive health, developmental learning disabilities in humans, and declining populations, altered morphology, physiology or behavior in wildlife. In these days, expert groups on chemicals in IPCS, IFCS and OECD are intensively discussing the identification of endocrine disruptors and the proper management of those chemicals. In this study, we screened the endocrine disrupting effects of lead using fertilized eggs of Oryzias latipes. In brief, the eggs were exposed to lead with different concentrations at Ringer's solution, and the mortality, the incidence of deformation, the body movement and the hatching success were determined after incubation. The histological analysis of normal and deformed larvae was also carried out. Compared to control, the mortality and the heart rate of eggs and/or larvae increased, but the hatching success and the tail movement decreased. The morphological observation showed the asymmetrical deformation of larvae and the distortion of spinal cord. The absorption of the liquid in yolk sac was hindered. The adverse effects of lead in the ontogeny of fertilized eggs of Oryzias latipes seemed to be stronger in pH5.6 than in pH7.5 solution. In summary, lead showed adverse effects on the ontogeny of fish fertilized eggs plays critical role in regulating biological systems and controlling developmental processes as an endocrine disruptor.

• 한국양식학회:학술대회논문집
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• 한국양식학회 2003년도 추계학술발표대회 논문요약집
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• pp.28-28
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• 2003

Viable interspecific hybrids between yellowtail flounder (Pleuronectes ferrugineus, Store.) and winter flounder (Pleuronectes americanus, Walbaum) were produced by artificial insemination of yellowtail flounder eggs with winter flounder sperm. However, mean fertilization rate, hatching success and early survival up to 3 weeks post hatch were significantly lower than those of parental pure cross controls (P<0.01). Overall, cytogenetic traits (karyological analysis and estimation of cellular DNA contents using flow cytometry) of hybrid flounder were intermediate between the two parental species. Microsatellite assay was used to distinguish the parental genomes in the hybrids; in most cases, one allele was specific to each of the parents. Morphometrics assessed by body proportions indicated that hybrids generally displayed a morphology intermediate between the maternal and paternal species. Interspecific hybrids exhibited abnormal and retarded gonad development in both sexes based on histological analysis of gonads from adult fish. The sterility of the hybrids presents a significant advantage for their use in aquaculture, as potential escapees would not be capable of reproducing in the wild and contaminating natural stocks.

• 환경생물
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• 제38권2호
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• pp.323-331
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• 2020

해산송사리(Oryzias dancena)를 대상으로 한 발생공학 연구시, 현재의 자연산란법은 매우 수동적이고 불편하다. 본 연구에서는 적정 시간에 해산송사리의 수정란을 획득하고자 인공산란을 위한 인간융모성생식선자극 호르몬(human chorionic gonadotropin; HCG)과 잉어 뇌하수체(carp pituitary extract; CPE)의 최적 농도를 조사하였다. 정자활성도, 산란율, 수정 후 3일에서의 수정란 생존율 및 부화율은 100 HCG IU kg^-1 BW (body weight)와 CPE 5 mg L^-1에서 가장 높았다(p<0.05). 본 종에서의 수정란 필요시, HCG와 잉어 뇌하수체 주사를 통하여 적정시간에 미수정란과 정자를 획득할 수 있었다. 본 연구 결과는 해산송사리의 실험동물화 개발에 유용하리라 사료된다.