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( Byung Chul Park ),( Jeong Cheol Han ),( Young Hyun Ko ),( Duck Mm Ha ),( Doo Hwan Kim ),( Insurk Jang ),( C Young Lee ) 한국동물자원과학회(구 한국축산학회) 2013 한국축산학회지 Vol.55 No.2
The aim of the present study was to investigate the effects of partial substitution of an extruded or extruded-pelleted corn product for unprocessed corn of the starter diet on growth performance and incidence of diarrhea in weanling pigs. Seventy-two 21-day-old weanling pigs were allotted to 24 pens and provided ad libitum with one of the four experimental diets for 3 wk in two serial feeding trials during summer beginning from late June. The treatments were a milk product-soy-corn-based control diet containing 25% unprocessed corn and the other three diets only substituted with 12.5% extruded corn Suprex, Optigrain, an extruded mixture of wheat, rye and durum, or extruded-pelleted corn for an equal percentage of unprocessed corn of the control diet. All diets were supplemented with 100 ppm sulfathiazone, 50 ppm penicillin, and 100 ppm chlortetracycline for preventive medication. The initial and final weights as well as gain: feed were less in the second trial than in the first one (p<0.05). However, effects of the dietary treatments were not detected in any of the performance variables including final weight, ADG, ADFI, and fain: feed, nor were there any interactions between the trial and dietary treatment. In addition, almost all pigs exhibited normal firm feces in both trials and therefore there was no main effect in the fecal consistency score. Results suggest that partial substitution of the thermally processed corn for unprocessed corn of the milk product-corn-soy-based and medicated starter diet has no effect on growth performance or incidence of diarrhea in weanling pigs.
강원도 묵호 연안에서 출현하는 대구횟대(Gymnocanthus herzensteini)의 식성
양재형 ( Jae Hyeong Yang ),윤상철 ( Sang Chul Yoon ),박정호 ( Jeong Ho Park ),윤병선 ( Byoung Sun Yoon ),최영민 ( Young Mm Choi ),이재봉 ( Jae Bong Lee ) 한국수산과학회 2013 한국수산과학회지 Vol.46 No.2
The feeding habits of the black-edged sculpin Gymnocanthus herzensteini were studied using 944 specimens collected from February 2011 to January 2012 in the coastal waters off Mukho, Gangwondo. Korea. The G. herzensteini ranged from 11.8 to 36.3 cm in total length (TL). The percentage of empty stomachs in G. herzcnsteini was 40.2%, and the main prey items were Pisces, Euphausiasea, and Macrura. The smallest size group (11.8-15.0 cm TL) consumed mainly Polychaea and Amphipoda. The quantity of prey increased in proportion to sculpin size. The composition of prey items and feeding habits of G. herzensteini exhibited seasonal fluctuations, that is. the main prey items during spring were Euphausiasea, whereas those during other seasons were Pisces.