• Journal of the Korea Organic Resources Recycling Association
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• v.12 no.2
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• pp.91-100
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• 2004

This study was on a recyling system of food waste using poultry and earthworms. Food waste was fed to the egg-raising hens(Gallus gallus) or ducks(Anas platyrynchos). And the excrement of poultry after ingestion of food waste was mixed with other organic waste such as paper mill sludge or night soil sludge, aged and then provided to the earthworms(Eisenia andrei). An egg-raising hen and a duck ate up 0.40kg and 0.79kg of food waste per day, respectively. And the percental rate of exctretion(the amount of excrement/the amount of food waste eaten up) of an egg-raising hen and a duck was 71.0% and 53.7%, respectively. The excrement of poultry that had been mixed with paper mill sludge and aged was vermicomposted more easily than the excrement that had been mixed with night soil sludge and aged. The excrement of poultry aged for more than 21 days was more suitable to vermicompost than the excrement of poultry aged for less than 21 days. Even though, the earthworm lost its biomass on the mixed feeds regardless of their aging periods, which was supposed to be caused by high salinity in poulty's excrements.

• Korean Journal of Environmental Biology
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• v.27 no.2
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• pp.155-163
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• 2009

The Oriental white stork (Ciconia boyciana) is an endangered species in Korea as well as in the world. In order to provide information on foraging habitats for releasing storks to the wild, we studied the foraging behavior of the species according to different food densities and water levels. We released two individuals, male and female, after enclosing a study site with a fence and cutting out a part of two or three primary feathers. Research was conducted from 20 June to 16 August 2008 at Whawon-ri, Mewon-myung, Chungcheongbuk-do, South Korea. We investigated habitat patch usage, foraging efficiency, and foraging methods of the feeding individuals in the different food densities and water levels. The storks invested more for foraging time and trials, and they captured more food in a habitat of high food density than others. The female invested more time and captured food most in a habitat of lowest water depth while the male in a habitat of middle water depth. However, foraging efficiency did not differ significantly among habitats of food density and water depth, and only differed between male and female by ways of foraging method. From this study we suggest that the storks select foraging habitats and foraging methods under different conditions of food density and water depth.

• The Journal of Korean Academy of Sensory Integration
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• v.8 no.1
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• pp.73-86
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• 2010

Problems in feeding habits could affect various aspects of children including growth, learning, communication, interaction with other children, etc. Oral consumption was defined as a participant opening his/her mouth, accepting food/liquid, and swallowing. A goal of the study is to find a method of evaluation and intervention of a child's feeding habits. Feeding is an important component in the early development of children and may have later consequences in the child's ability to participate successfully in their activities of daily life. Children show personal difference on the foods which they try first because stimuli from the foods are revealed as a mealtime behavior through sensory registration and processing. Feeding problems in sensory processing consist of tactile oversensitivity, oral refusal, tactile undersensitivity, and oral dyspraxia. In order to identify problems of sensory processing among feeding difficulties and plan intervention, the understanding of neurological processing and sensory processing characteristics related to feeding is necessary. Reviewing intervention for feeding problems related to sensory processing is required for an effective approach for feeding and providing better life for children.

• Korean Journal of Environment and Ecology
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• v.33 no.2
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• pp.168-177
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• 2019

This study was conducted to examine the impact of various environmental factors on the feeding behavior of black-faced spoonbills Platalea minor known to use rice fields during the breeding season. We surveyed the rice fields three times a month from April to June 2017 and from April to June 2018. We counted the number of black-faced spoonbills and measured the environmental factors such as the water depth, paddy type by cultivation stage, and biomass of potential prey that are expected to affect black-faced spoonbills. We also filmed the feeding behavior of black-faced spoonbills to examine differences in feeding behavior by environmental factors. The survey showed that the number of black-faced spoonbills reached its peak from late April to late May which was the breeding period. Among a total of 308 black-faced spoonbills observed, 86.4% (n=266) were observed feeding on rice paddies, 90.6% (n=279) were adults, and none was observed on dry paddies. The biomass of rice paddy increased significantly since May when fish started hatching, and there was a significant difference in the amount of biomass between the rice paddies where black-faced spoonbills were observed and other rice paddies. The analysis of the feeding behavior of black-faced spoonbills showed that the feeding efficiency and feeding success rate of black-faced spoonbills increased significantly when the amount of biomass soared and that the number of steps of black-faced spoonbills per minute increased greatly after rice planting was completed. The number of bill sweeping was not related to the feeding efficiency, feeding success rate, and paddy type by cultivation stage.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.35 no.2
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• pp.196-200
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• 2002

In order to identify the feeding stimulants for flatfish, the feeding tests were conducted using some diets added the amino acids, nucleotides, betaine and TU and acid hydrolysates to basal diet formula, respectively, The feeding stimulant activities and synergistic effects of those compounds were evaluated by a bioassay method. The KH, a kind of acid hydrolysate, possessed a remarkable feeding stimulant activity. It's stimulant activities were increased up to the concentration of $1.05\%$ (w/v), and were independent of pH. The formulation of KH and glycine had a most synergistic effect, The feeding rate of diet with feeding stimulation was 1,4 fold than that of diet without one. The costs for optimum formulation of feeding stimulants were cheaper than some additives in diets. It suggest that the results can practically used in preparation of diet containing feeding stimulant effects for flatfish.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2003.05a
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• pp.193-194
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• 2003

소화관은 먹이의 저장과 소화 흡수가 일어나는 곳으로 어류의 섭식량은 먹이를 저장하는 위의 크기에 따라 결정될 것이며, 공급횟수는 섭취된 먹이의 소화시간에 영향을 받는다 (Ikeda et at., 1986; Takii et al., 1997). 따라서, 어류의 사료 섭식과 소화패턴은 각 어종별 소화기관의 형태적 특성에 따라 좌우 될 수 있어 사료의 효율적인 공급방법을 확립하기 위해서는 소화기관의 형태적 특성이 우선적으로 파악되어야 할 것이다. (중략)

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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• v.8 no.1
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• pp.29-34
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• 2003

Recent reports on the phagotrophic feeding of M. rubrum are based on cultivation experiments with novel isolates of this ciliate species from Gomso Bay, Korea. Photo-adapted cryptophyte(CR-MAL01) cultures at high light of 100 $\mu$mol photons m$^{-2}$ s$^{-1}$ (HL) and low light of 10 $\mu$mol photons m$^{-2}$ s$^{-1}$ (LL) were fed to M. rubrum (MR-MAL01) cultures under HL and LL conditions, respectively. Absorbance spectrum by LL M. rubrum showed the same peak at wavelengths around 542nm as that by LL cryptophyte prey, which was not showed in HL M. rubrum. This result supports the implication that light utilization and absorption pattern of M. rubrum population must depend on the status of photo-adaptation of the co-existing population of prey cryptophyte. Consequences of the present research results were discussed in relation to the function of the prey cryptophyte and phagotrophic M. rubrum in marine microbial ecosystem.

• Journal of the Korea Organic Resources Recycling Association
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• v.12 no.4
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• pp.130-138
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• 2004

Food wastes with different regional origins were mixed with bulking agent such as paper mill sludge or night soil, and aged for 21 days or 28 days. And aged food wastes were fed to the earthworm(tiger worm, Eisenia fetida) for 60 days. There were no significant physico-chemical differences among the food wastes with different regional origins. EC values and NaCl concentrations in food wastes were too high for earthworms to survive. Food wastes mixed with paper mill sludge were vermicomposted more efficiently than food wastes mixed with night soil, but the over-all vermicomposting rates on the food wastes were much lower than that on paper mill sludge because EC values and NaCl concentrations were still high for earthworm to compost the feeds. Earthworm population did not increase its biomass on the food wastes mixed with paper mill sludge or night soil, whereas earthworm population fed with paper mill sludge increased its biomass by 20% for 60 days. It could be concluded that a solution for reducing NaCl concentrations in food waste should be developed to vermicompost food waste.

• Korean Journal of Ecology and Environment
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• v.51 no.2
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• pp.184-191
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• 2018

During the breeding season, some Eurasian Oystercatchers (Haematopus ostralegus osculans) in Yubu Island foraged in the open mudflat area nearby the breeding ground, instead of the tide water line area, main feeding site throughout the year. We found significant differences in foraging behavior and prey species diversity between the two different feeding site types. Even though the birds took more steps for most probably searching preys, their feeding success was much lower in the open mudflat area than the tide water line area. The multiple peck and boring methods were more frequently adopted to catch polychaetes on the open mudflat area, whereas the single peck method was dominant and gastropods and bivalves were main preys in the tide water line area. This study suggests that the bird shows flexible foraging strategy of shifting feeding site, foraging behavior and preys for better reproductive success.

• The Korean Journal of Soil Zoology
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• v.7 no.1_2
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• pp.17-21
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• 2002

Food waste which had been mixed with night soil sludge and composted for 21 days (mixing ratio = food waste/paper mill sludge : 1, w/w) was supplied to the 5 g of Eisenia fetida popualtion at various temperatures (5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 31, 32, 33, 34, 35$^{\circ}C$). The biomass of earthworms one month after feeding at 20-32$^{\circ}C$ was about two times more than that of the introduced earthworms, increasing rate of which was much higher than them at the other tested temperatures . There were decreases at temperatures below 7$^{\circ}C$, and less increases at temperatures of 8-10$^{\circ}C$ in biomass. Earthworms could not survive at temperatures at 34$^{\circ}C$ and 35$^{\circ}C$. Feeding rates of earthworms were much higher at 20-32$^{\circ}C$ than them at the other tested temperatures, and there were no differences among them at temperatures of 20-32$^{\circ}C$. But at 3 months after feeding, the biomass and feeding rate of earthworms decreased severely even at 20$^{\circ}C$ and 30$^{\circ}C$, which was supposed to be due to the long term effect of salts, especially sodium chloride (NaCl) in the food wastes.