http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 김종비 ( Song Cho Kyu (검색결과 1 건)
- 무료
- 기관 내 무료
- 유료
-
치악산 (雉岳山) 계류에 서식하는 둑중개 ( Cottus poecilopterus ) 의 초기발생 및 생태
조규송,변화근,김종비 ( Song Cho Kyu,Hwa Kun Byeun,Jong Pil Kim ) 한국하천호수학회 1993 생태와 환경 Vol.26 No.1
This study was performed to investigate ecological and early embryonic development of Cottus poecilopterus Heckel which is found along Chiak mountain stream, Shinheung-Dong, Socho-Myon, Weonju-Gun, Kang worn-Do province, during the period from March, 1992 to September, 1992. The area studied has mainly cobble bottoms, and the water current of the river ranges from 70cm to 80cm per second under normal conditions. The sex ratio of the male to female was 1 : 1.6, and male was 10∼15mm larger than the female in body length. Through the investigation of length frequences, age and growth of C. poecilopterus was analyzed. In male, 50∼60mm fish group is a yearling, 60∼80mm is two years old and longer than 100mm is regarded as being over three years old, while 40∼50mm group of female is a yearling, 60-7Omm is two years old and longer than 80∼100mm is regarded as three years old. Based on the ratio of gonadal weight to body weight, the spawing peoriod in this population was concentrated in April, and become sexually mature in two years old. In March and April, the mean total egg numbers in ovary were 264 and the diameter of mature egg was about 1.5±0.015mm. The eggs began to hatch appriximately about 235 hours after artificial fertilization and reached the free swimming stage 18 days after artificial fertilization at water temperature 9±1˚C. The stomach contents were abundant with aquatic insects.
코리아스칼라연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
