• Journal of Navigation and Port Research
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• v.34 no.1
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• pp.77-82
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• 2010

These days our coasts have been damaged by the polluted water resulting from the construction of industry on the shore, increasing population and urbanization. The destruction of ecosystem has induced many problems to aquaculture such that it raises the production cost of aquatic products for eating. For solving these problems aquafarm has been moving to the land. This paper intends to describe the automatic feeding system for the inland fish farm. An existent automatic feeding system has problems such that feed quantity is not accurate and feed itself is broken by feed motor. But a proposed system in this paper is more accurate than the existent system in view of feed quantity by using the combination of valve and load-sell. Resultantly, the system can safely transfer feed to inland nursery tank. Through several experiments using a real system, the effectiveness of the proposed system is verified under all conditions.

• Korean journal of applied entomology
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• v.32 no.3
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• pp.354-371
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• 1993

Behavior of adult females of the smoky brown cockroach was observed for 10-15 days continuously by using computer and the automatic sensoring system. Under the light condition of l2L~ 12D, individual variations were generally higher and the periodicity appeared less in terms of the presence time at the micro-habitats and the locomotory activity. The smoky brown cockroach appeared 20.42, 11.50, 6.31 and 2.66 % in a day in averages respectively at the shelter and the places for other individuals, feeding and drinking. It stayed 20.29 % in a day at the shelter when food, water, and other individuals were not supplied. Visiting rates were higher at the feeding and dnnking places than at. the ot.her micro-habitats. The degree of t.he locomotory activity was relatively lower when food, water, and other individuals were not supplied t.han when they were supplied. The Pnncipal Component Analysis (PCA) on the presence at the micro-habitats showed that. t.he presence pattern for each mdividual appeared differently (Q mode) while the differem time zones were grouped to the photophase and scotophase (R mode). When food, water, and other individuals were supplied the degree of grouping was higher at the shelter than at the places for feeding and drinking. When the act.ivityand the presence time at the different micro-habitats were jointly analyzed by PCA, the achvity of the female smoky brown cockroach appeared in relation with the presence time ( %) at the places for feeding and other individuals.

• Feed Journal
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• v.4 no.10 s.38
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• pp.124-131
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• 2006

이번 호부터는 실험용동물과 관련해서 원생동물부터 포유류까지 광범위하게 다루고자 한다. 특히 동물뷴류법과 관련하여 그 분류에 있어서 표현이 쉽지 않아 한자어와 영어를 병용해서 기재하고자 한다. 특히, 이번호에서는 사료 외에 이료(먹이)라는 말이 등장한다. 영어에서는 둘다 feed, diet ration이지만, 일반적으로 사료라고 하는 경우에는 feed, 그리고 나머지 둘은 1일 즉,하루 분이라는 양적 개념이 포함되어 있다. 어패류에게 주는 먹거리를 전부 먹이라 하였지만, 배합사료의 보급과 함께 자연계에 존재하는 것을 먹이(천연먹이)라 하였다. 「사료의 안전성의 확보 및 품질의 개선에 관한 법률」에서는 「가축 등의 영양소 제공을 목적으로 사용 하는 것」을 사료라고 정의 하고 있다. 일반적으로 2종류 이상의 것이 인위적으로 혼합된 것을 사료라고 한다. 어류의 양식에 사용되는 정어리나 까나리(냉동품도 포함)는 생미끼, 종묘 생산에 이용되는 담륜층이나 Artemia salina등과 같은 플랑크톤은 생물먹이라고 하고 있다. 사료나 먹이를 최근에는 급이라고 한다.

• Journal of Navigation and Port Research
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• v.33 no.10
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• pp.709-713
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• 2009

Water pollution of coast has a significant impact on the fish farm and fisheries. For solving the water pollution problems the fish farms are moving to the open sea. The fish farms in open sea have to operate by the automatic feeding system and remote monitoring system for safety and management. This paper describes an automatic feeding system for fish farms in open sea. Water temperature and fish weight will change depending on the amount of feed. And the fish farm temperature is changed extremely in open sea than on land side. This paper described that the feed amount is calculated automatically according to temperature, fish weight, and the automatic feed system. And the performance of automatic feed system is verified with test model for operation test.

• Korean Journal of Ichthyology
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• v.20 no.2
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• pp.123-128
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• 2008

The foraging behavior of the beauty goby, Pterogobius zacalles, was studied at Mutu Bay, Aomori province, Japan. P. zacalles harvested invertebrates prey from benthic substrates by using two distinct foraging modes: picking substrate among boulders and sucking surface of boulder. Among others, picking substrate among boulders was primarily used foraging mode. The foraging modes of P. zacalles were followed by three stages: searching for prey, feeding and chewing. For foraging, it takes less time to suck out the surface of boulder than pick up substrate among boulders, because the resting site of P. zacalles is close to the place where they do sucking. The diets of P. zacalles primarily consisted of benthic amphipods regardless of their foraging modes. Only the difference was that they can get bigger amphipods when they did picking rather than sucking. Even though it needs more time and energy to do picking, P. zacalles was compensated by getting a high-calorie diet eventually, therefore prey size can be the determinant of their foraging modes.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.30 no.5
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• pp.719-729
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• 1997

Stomach contents of bigeye tuna, Thunnus obesus, and yellowfin tuna, Thunnus albacares, caught by longlining in the western tropical Pacific were analyzed to examine their foods and to compare their feeding behavior. The food species of both bigeye and yellowfin tunas were primarily fishes, crustaceans, and cephalopods. A total of 15 fish, 6 crustacean, and 1 cephalopod species were identified from their stomach contents, of which lantern fish (Myctophum sp.) was the most important food for both tuna species. No significant differences in species composition of food items between bigeye and yellowfin tunas were observed, indicating that in the same habitat the tunas have a similar feeding behavior. However, while they showed a remarkable similarity in diet composition, significant quantitative differences on the basis of IRI values were observed in several diet species, such as Myctophidae, Alepisauridae, Oplophoridae, Gammaridae, and Onychoteuthidae.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.10a
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• pp.167-170
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• 2015

In this paper, we propose the Micturition training and Automatic feeding system to enable busy modern people can grow pets more efficiently. This system will be able to operate a smart phone application with a Bluetooth, furthermore, by using the Wifi access the Internet from anywhere and to operate remotely. This system is divided micturition board feeding unit. micturition board consists of a water pressure sensor for detecting micturition and recorder module, speaker for voice output, feeding unit consists of two servo motor for auto feeding and Bluetooth sensor for remote control. Both micturition board and feeding unit produced Arduino board and C language-based Arduino sketch program, feeding unit was able to communicate with the library to support Bluetooth communication.

• Journal of Navigation and Port Research
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• v.34 no.10
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• pp.793-797
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• 2010

The depleting fishes resource and water pollution in coast has a decisive effect on the fish farm and fisheries. For solving these problems the fish farms are moving to the offshore. The fish farms in offshore have to design the strong mechanism as compared with cost's fish farm, and operate by the remote feeding system and monitoring system for safety and management.. This paper describes a remote feeding system for fish farms in offshore. The amount of feed is depending on temperature and fish weight. The fish farm temperature is changed extremely in offshore than on land side. This paper described that the feed amount is calculated automatically according to temperature and fish weight, and the remote feed system. The performance of remote feed system is tested with model.

• Korean Aquaculture
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• v.12 no.1
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• pp.95-99
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• 2000

이번 호에서는 먹이생물 관련 양식 정보 시리즈 여섯 번째로 수산 증양식 분야에서 어린 유생의 먹이로서 이용되는 식물${\cdot}$동물 먹이생물의 배양 방법으로서 배량 배양으로 들어가기 전에 선결되어야 할 단일종 배양, 스트레스 배양 그리고 무균 배양에 대하여 기술한다.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.10a
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• pp.267-268
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• 2001

양식산업 초기에는 해양의 먹이사슬에서 해산어류의 초기먹이로서 중요한 역할을 하고 있는 요각류를 자연 수역에서 직접 채집하여 먹이로 이용하였으나, rotifer와 Artemia가 먹이생물로 이용되기 시작하면서 현재까지 해산어류 종묘생산장에서 이들이 가장 널리 사용되고 있다. 이 중 특히, Artemia는 cyst를 쉽게 부화시켜 먹이로 공급할 수 있고, 장기간 보관이 가능하여 해산 어류 종묘생산시 매년 그 수요량은 증가되고 있는 실정이다. (중략)