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실내 수조에서 먹이 지급 및 미지급에 따른 왜문어(Octopus vulgaris)의 행동반응
권인영(Inyeong Kwon),남윤상(Yun-Sang Nam),박정인(Joeng-In Park),정철호(Chul-Ho Jeong),김태호(Taeho Kim) 전남대학교 어업기술연구소 2014 어업기술연구소보고지 Vol.7 No.1
The common octopus (octopus vulgaris) is considered very potential candidates for marine aquaculture diversity, as they show fast growth and retain high market price. The purpose of this study is to evaluate behavioral responses of the octopus vulgaris on feed and no feed conditions in indoor water tank for 24 days (9.17. ~ 10.10., 2013). In the experiment, swimming speed, activity aggression and accessibility of octopus in the water tank was analyzed based through observations of video camera footage and PVS software. A total of 6 octopuses were used, with an initial body weight of 241.6 ± 48.4 g and the water temperatures ranged from 15 to 16℃, and salinity raged 33 psu. All of the octopuses showed a higher growth rate, activity aggression and accessibility in feed condition rather than no feed conditions. In particularly, growth rate of octopuses decreased to 1.21% in 2-3days later in no feed condition. The swimming speed was reduced from 0.32 ㎧ in feed condition to 0.10 ㎧ in no feed condition. Activity of octopus vulgaris reduced nearly four times from an average of 115 in feed condition to 32 in no feed condition respectively.
Youngduck Eun,Hyesun Jeong,Seungjin Kim,Wonseo Park,Byoungseon Ahn,Dongkeun Kim,Eunhee Kim,Eunhee Park,Sunhee Park,Inyeong Hwang,Hyunjin Son 한국역학회 2018 Epidemiology and Health Vol.41 No.-
OBJECTIVES: This study aimed to reveal the epidemiologic characteristics of the outbreak of gastroenteritis caused by Salmonella enterica serovar Thompson in Busan Metropolitan City and to identify points for improvement to prevent of food-borne disease outbreak. METHODS: This was a case-control study. The control group comprised asymptomatic students in the same classes of the cases. The presence or absence of symptoms, ingestion of each food provided by school meal service, and commonly ingested foods in addition to those foods in meal service were investigated. Moreover, specimens collected from rectal swab, preserved foods, and environmental surface were tested. RESULTS: Of the 6,092 subjects, 1,111 (1,083 students, 22 school personnel, and 6 foodservice employees) were included in the case group; this corresponded to an 18.4% attack rate. Symptoms included diarrhea (n=1,051, 94.6%), abdominal pain (n=931, 83.8%), febrile sensation (n=502, 45.2%), and vomiting (n=275, 24.8%). The epidemic curves of each 10 schools were unimodal. Investigation of food intake showed a significantly high odds ratio for chocolate cake in 5 out of the 10 schools. Laboratory test detected Salmonella enterica serovar Thompson both in rectal swab specimens of 9 schools and in collected preserved chocolate cakes of 9 schools. Pulsed-field gel electrophoresis test result showed that Salmonella enterica seorvar Thompson isolated from human and foods were the same. CONCLUSIONS: The source of infection for the Salmonella enterica serovar Thompson outbreak in the 10 schools of Busan Metropolitan City is chocolate cake. Traceback investigation for origin of contaminated food in food-borne disease outbreak and safety control during food production should be more enhanced.