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곤쟁이,Archaeomysis kokuboi의 개체군 구조와 세대분석
마채우 순천향대학교 기초과학연구소 2001 순천향자연과학연구 논문집 Vol.7 No.1
Archaeomysis kokuboi Ii, 1964 is a benthic mysid inhabiting the nearshore area from the swash zone to the surf zone of sand beaches. The population stricture and generation analysis of A. kokuboi was investigated in Songjeong Beach, Korea. The occurrence of ovigerous females showed a pattern of three breeding peaks, representing three generations; The overwintering generation, Spring generation and Summer generation. Size frequency distribution represented the monthly reproductive phenomena such as breeding seasons, and relative abundance of the developmental stage. Each generation was different in breeding period, size of the ovigerous females and life span. The life span of individuals depended on the seasonal changes in sea water temperature. The overwintering generation had a life span of 8 months, and the spring and the summer generation had a life span of 5 months.
곤쟁이,Archaeomysis kokuboi의 초기성장에 관한연구
마채우 순천향대학교 기초과학연구소 2001 순천향자연과학연구 논문집 Vol.7 No.1
The life history of A. kokuboi was investigated in Songjeong Beach, Korea. The growth was analysed in terms of intermolt period, percentage increment and growth rate based on laboratory rearing. Under the given temperature regimes, the intermolt period of the juveniles increased with all developmental stages except the first. In all cases, the intermolt period of the first stage was longer than that of the second stage. Intermolt periods varied with the rearing temperatures. Mean intermolt periods were 18 days, 5 days, and 3 days in 10℃, 18℃, and 25℃, respectively. Sexual characters appear in the 3rd-4th juvenile stages, and the 7th stage has a marsupium in female and a penis in male. Appearance of sexual characters is determined neither by the size of individuals nor by the cumulative intermolt period of the individuals. It is noted that the onset of sexual differentiation and sexual maturity depends on the number of moltings. The daily growth rate of A. kokuboi was inversely proportional to rearing temperature. The growth rate of A. kokuboi at 10℃, 18℃. and 25℃ was 0.008mm/day, 0.029mm/day, and 0.043mm/day, respectively.
탄수화물 함량이 다른 사료의 만복 또는 제한 공급이 조피볼락의 성장 및 체성분에 미치는 영향
마채우,이종화,이종윤,이상민 순천향대학교 기초과학연구소 1997 순천향자연과학연구 논문집 Vol.3 No.1
A 4-month feeding experiment was conducted to investigate the effects of feeding rate on growth, feed efficiency and body composition in juvenile Korean rockfish (Sebastes schlegeli). The fish averaging 7.1g were fed one of two isonitrogenous (46%) and isocaloric (360 ㎉/100g diet) diets containing different dextrin levels (20% or 2%) at different feeding rates of satiated or restricted, respectively. Growth rate, feed efficiency and nutrient retention of fish fed the diet containing 20% dextrin were higher than those of fish fed the diet containing 2% dextrin. These values (except for feed efficiency and protein retention) of fish fed the diets at satiated feeding were higher than those of fish fed the diets at restricted feeding. Feed efficiency and protein retention of fish fed the diets at satiated feeding were lower than those of fish fed the diets at restricted feeding. Lipid content of whole body, dorsal muscle, liver or viscera in fish fed the diets was not affected by different dietary dextrin levels, but this value was affected by feeding rates.
실험 배합 사료의 filler 종류에 따른 조피볼락의 성장 효과
마채우,이종화,이종윤,이상민 순천향대학교 기초과학연구소 1997 순천향자연과학연구 논문집 Vol.3 No.1
A 13-week feeding experiment was conducted to investigate the effects of dietary filler on growth and feed efficiency in Korean rockfish (Sebastes schlegeli). The fish average weighing 75g were fed one of eight isonitrogenous (42.5%) and isocaloric (335 ㎉/100 g diet) diets containing α-cellulose(5 and 10%), chitin(10%) or kaolin(5∼20%) as filler. Weight gain of fish fed the diet containing 10% α-cellulose or 15% kaolin was higher than that of fish fed the diet containing 5% kaolin (P<0.05). Feed efficiency of fish fed the diet containing 5% or 10% α-cellulose or 15% kaolin was higher than that of fish fed the diet containing 5% kaolin (P<0.05).
마채우 ( Chae Woo Ma ),홍성윤 ( Sung Yun Hong ),임현식 ( Hyun Sig Lim ) 한국수산학회 1995 한국수산과학회지 Vol.28 No.5
1991년 11월과 1992년 1월 총 2회에 걸쳐 남해안에 위치한 득량만의 저서동물상을 조사하였다. 조사결과 총 118종 20,7677개체의 저서동물이 채집되었으며, 이 가운데 다모류가 52종(44.1%)으로 가장 많았고, 갑각류가 45종(38.1 %), 연체동물이 14종(11.9% )이었다. 저서동물의 평균 밀도는 1432.2 개체/m2였으며, 연체동물의 밀도가 가장 높아 920.4 개체/m2로 전체의 64.3%를 차지하였는데 이것은 이매패류인 Musculista senhousia의 고밀도 출현 때문이었다. 한편 다모류는 275.8 개체/m2, 갑각류는 219.6 개체/m2의 밀도였다. 주요 우점종은 이매패류인 Musculista senhousia, 다모류인 Eteone longa, 옆새우류인 Nippopisella nagatai였으며 각각 632.8 개체/m2, 37.8 개체/m2, 35.3 개체/m2의 밀도였다. 한편 유기물 오염지표종으로 알려진 Capitella capitata는 밀도는 낮으나 주로 육지 및 하천에 인접한 정점에서 출현하므로서 이들 정점들은 유입되는 유기물의 영향을 받고 있음을 알 수 있었다. 한편 득량만은 종 조성에 근거하여 만 중앙을 중심으로 크게 4개의 정점군으로 나눌 수 있었다. 또한 저서동물 가운데 유기물 오염지표종의 출현 밀도가 낮은 현상으로부터, 득량만은 남해안의 진해만이나 광양만 등에 비해 유기오염의 영향이 크지 않은 것으로 판단된다. Macrobenthic community was studied in Deukryang Bay, southwestern coast of Korea, in November 1991 and January 1992. Macrobenthic fauna consisted of 118 species with 20,767 individuals. The number of species and occurrence frequency of the major groups were as follows: 52 polychaetes species (44.1%), 45 crustaceans species (38.1%), 14 mollusks species (11.9%) and 7 other group species (5.9%). The mean density was 1432.2 ind./m2. The density of major groups showed that mollusks was 920.4 (ind./m2), polychaetes 275.8 (ind./m2), and crustaceans 219.6 (ind./m2). The dominant species were Musculista senhousia (Bivalvia), Eteone longa (Polychaeta), Nippopisella nagatai (Amphipoda) with density, 632.8 ind./m2, 37.8 ind./m2, and 35.3 ind./m2, respectively. This area could be divided into four areas by the cluster analysis based on the species composition.