• Proceedings of the Korean Society of Environment and Ecology Conference
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• 2006.04a
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• pp.153-156
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• 2006

• Proceedings of the Korean Society of Environment and Ecology Conference
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• 2005.10a
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• pp.161-163
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• 2005

• Proceedings of the Korean Society of Environment and Ecology Conference
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• 2006.10a
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• pp.86-96
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• 2006

To provide some ecological informations for protection and management of mixed heronries, their distribution, breeding species and individuals, and site characteristics that may be important to heron ecology were investigated in Jeollanam-do during 2005 breeding season. During the study, 17 mixed heronries, containing a total of six ardeid species were found. Of them, Great Egret(Egretta alba) and Grey Heron(Ardea cinerea) bred in most sites(both 92%) and were most numerous(36.3%, 31.0% respectively). Many of heronries(53.3%) were located within the bamboo forest. Other site characteristics were as follows: the mean area of heronry was $2346m^2$ with range of $500-7,000m^2$, the mean distance between nearest two heronies was 18.1km with range of 5.6-40.4km, the mean distance to nearest village was 297m with range of 10-2,000m, the mean gradient of the topography was $18^{\circ}$ with range of $2^{\circ}{\sim}40^{\circ}$, and 40.0% of heronries were located in the eastern slope.

• Proceedings of the Korean Society of Environment and Ecology Conference
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• 2006.10a
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• pp.42-44
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• 2006

• Korean Journal of Environment and Ecology
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• v.31 no.1
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• pp.24-29
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• 2017

This study was conducted to identify nesting habits and breeding biology of barn swallow in Gwangju, Korea, for the breeding season 2012 to 2014. All nests were attached to vertical walls and roofs of buildings and situated at mean height $2.9{\pm}0.3m$ above ground with nest diameter $18.2{\pm}3.2cm$, nest depth $9.8{\pm}3.1cm$, nest cup diameter $11.2{\pm}1.5cm$ and nest cup depth $3.27{\pm}0.80cm$. Nests were attached to cemented walls (44.9%), wooden materials (23.1%), bricks (21.8%) and lighting (6.4%). The average clutch size was 4.5 and ranged 2~5. Mean egg length was $18.23{\pm}0.73mm$, breadth $13.11{\pm}0.25mm$, volume $1.60{\pm}0.11cm^3$, shape index $1.39{\pm}0.05$ and weight $1.69{\pm}0.15g$. Hatching and fledgling success rate were 89.1% and 84.5%. Main causes for reproductive failures were unhatched eggs, predation, nest destruction and desertion. These results are expected to be widely used as data for habitat preservation and species management of barn swallows.

• Korean Journal of Environmental Biology
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• v.37 no.1
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• pp.88-92
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• 2019

The objective of this study was to report the group mating of Asian Keelback snake, Hebius vibakari, in South Korea. On May 20, 2009, the group mating of H. vibakari was observed in the Maeng-gol do, Jindo-gun, Jeollanam-do, in the rocky area (107 m above sea level) on the ridge of the island. Six female and five male snakes made a form of mating behavior called "mating ball". Two couples showed "tail-wrestling" which is the copulation behavior in snake species. During the mating, the temperature and humidity were $25.7^{\circ}C$ and 59%, respectively. The result of this study was the first case report of the group mating in H. vibakari, a rare reptile.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.05a
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• pp.499-501
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• 2000

굴을 포함한 대부분의 해양 무척추동물들은 동일종이라도 먹이조건과 온도조건에 의해 성장과 발육, 번식초기연령이나 최소번식 크기 등에 큰 차이를 보인다. 굴의 번식수단 및 생활사 를 이해하기 위해서는 번식이나 생활사에 관한 속성을 보다 수량적으로 확인하고 동시에 개체군 생태학적인 지견을 가질 필요가 있다 (윤, 1996). 대서양산 굴, Crassostre virginica에 대하여 Lee and Heffernan (1991)은 알의 지질과 단백질 조성을 밝히고 생화학적 특성을 보고하였으며, Choi et al. (1993)는 면역학적 방법을 이용하여 번식량에 대한 정량적인 연구를 보고한 바 있으나, 이와는 대조적으로 참굴 C. gigas의 알 및 번식량에 대한 연구는 미비한 실정이다. (중략)

• Korean Journal of Ornithology
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• v.25 no.2
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• pp.101-105
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• 2018

On 22 June 2018, we observed the breeding of the Pied avocet (Recurvirostra avosetta) at landfill sites in Saemangeum, Jeollabuk-do Province. The breeding ground was a temporary swamp, and four juvenile were constantly observed with adult bird. This observation is the first breeding record of Pied avocet (Recurvirostra avosetta) in Korea.

• The Korean Journal of Ecology
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• v.26 no.1
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• pp.29-33
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• 2003

This study was conducted to clarify the influence of national road construction on breeding bird community from April to June 2002 in 8 fragmented forest areas of Baekdudaegan mountain ranges, Korea. There were more observed birds in 50∼100m areas than in 50m areas from road. Guild structures were different between both areas. Number of species and individuals belong to hole nesting and canopy foraging guilds were lower in 50m areas than in 50∼100m areas from roads. Habitat structure of breeding bird community would be changed by road construction.

• Korean Journal of Weed Science
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• v.12 no.4
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• pp.335-351
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• 1992

The identification of green algae which were collected from paddy rice fields of the whole nation was conducted in 1991, and also the reproduction processes of three important green algae were investigated. The green algae identified were 46 species in 16 families including 4 species in the Volvocaceae, 4 species in the Palmellaceae, 3 species in the Ulotrichaceae, 3 species in the Oocystaceae and 6 species in the Scenedesmaceae. It was recognized that the algae which have caused a large injury to the flooded direct-seeded rice in Seosan reclaimed saline land was the genus Cladophora. The green water blooms on paddy water were induced mostly by the concentrated populations of suspended green algae such as the genera, Chlamydomonas and Stichococcus. A rapid propagation of Hydrodictyon was resulted from the asexual reproduction forming autocolony in each mother cell. The sexual and asexual reproduction processes of Oedogonium and the sexual reproduction process of Spirogyra were observed.