• Title/Summary/Keyword: 육식성

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테마연재 / 카니보어 시스템을 통한 이메일 감청

  • Kim, Yeon-Su
    • Digital Contents
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    • no.6 s.97
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    • pp.68-70
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    • 2001
  • 카니보어는 감청용 소프트웨어들을 내장한 개인용 컴퓨터 형태로 되어 있는 장비로서 인터넷을 통하여 수없이 오가는 전자우편들 가운데 특정 범죄혐의와 직접 관련된 핵심정보들만을 잡아낸다고 하여, 육식성 동물을 뜻하는 'Carnivore'라는 이름으로 불린다.

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Ontogenetic Food Habits of Four Common Fish Species in Seagrass Meadows (해초생태계에 서식하는 4 우점어종의 성장에 따른 먹이의 변화에 관한 연구)

  • 허성희
    • 한국해양학회지
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    • v.21 no.1
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    • pp.25-33
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    • 1986
  • Ontogenetic food habits of the four most abundant fish species in seagrass neadows of Redfish Bay, Texas, were examined quantitatively during 1982-1983. The darter goby (Gobionellus bolelsoma) and pinfish (Lagodon rhomboides) were trophic generalists, which used a wide range of food items. The darter goby had relatively diverse, omnivorous diet which included amphipods, copepods, polychaetes, filamentous algae, diatoms, and detritus. This species did not show distinct ontogenetic changes in foodpreferences. Unlike the darter goby, the pinfish showed ontogenetic progression of four feeding stages. An initial feeding stage was a planktivorous stage in which copepods were int major food items, followed by a carnivorous stage in which amphipods became the major food items, an omnivorous stage in which filamentous algae, diatoms, amphipods, and polychaetes were the major food items, and finally a herbivorous stage in which seagrass pieces with attached epiphytes and their debris were the major food items. The code goby (Gobiosoma robustrm) and Gulf pipefish (Syngathus scovelli) appeared to be relatively specialized in food havits as carnivorous. Similar ontogenetic changes in food habits were observed for these two species, i.e.initially, copepods were the major food items, followed by a gradual transition to amphipods with growth.

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Diel Changes in the Diet of Rudarius ercodes: A Diurnal Omnivore and Nocturnal Carnivore (그물코쥐치의 먹이습성의 일별 변화: 낮은 잡식성, 밤은 육식성)

  • Kwak, Seok Nam;Huh, Sung-Hoi;Choi, Chang Geun
    • Korean Journal of Ichthyology
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    • v.18 no.3
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    • pp.178-183
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    • 2006
  • Diel changes in the feeding habits of Rudarius ercodes were investigated in an eelgrass bed of Jindong Bay, Korea. The main food components for R. ercodes (1.6~ 4.3 cm SL) were gammarid amphipods, eelgrass, polychaetes and urochordates. Most dietary items were inhabitants of an eelgrass bed. Diel variations in diet and feeding activity occurred. The diet of R. ercodes underwent changes from eelgrass and gammarid amphipods (omnivore) at day to mainly gammarid amphipods, polychaetes, and urochordates (carnivore) at night. Rudarius ercodes probably took detached eelgrass leaves and grazed live eelgrass during day, whereas feeding on gammarid amphipods, polychaetes, urochordates, and bivalves were facilitated by nocturnal movement and activity of these prey during night. The feeding activity of R. ercodes was also correlated with periods of high tides.

Feeding Habits of an Introduced Large Mouth Bass, Micropterus salmoides (Perciformes; Centrachidae), and Its Influence on Ichthyofauna in the Lake Okjeong, Korea (옥정호에 도입된 배스 Micropterus salmoides의 식성 및 어류상에 미치는 영향)

  • Ko, Myeong-Hun;Park, Jong-Young;Lee, Yong-Joo
    • Korean Journal of Ichthyology
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    • v.20 no.1
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    • pp.36-44
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    • 2008
  • Feeding habits of Micropterus salmoides were investigated from the stomach contents of specimens ranging from 13 to 511 mm in standard length (n = 419), which are collected in the Lake Okjeong, Korea, 2006 to 2007. M. salmoides is a very strong carnivorous fish eating living organisms such as lots of fishes, small amount of aquatic insects and shrimps. As they grow, the feeding habits changed : they fed mainly on Branchioda in 10 to 20 mm in SL., aquatic insects and small fishes in 30 to 50 mm in SL., fishes including Zacco platypus, Hemiculter eigenmanni and Rhinogobius brunneus over 50 mm. However, among the prey organisms, M. salmoides most preferred living fishes. Analysing ichthyofauna of the Lake Okjeong from 1981 to the present investigation, after and before introduction of M. salmoides, it was showed that there was a certain reduction in fish diversity. Consequently, it is likely to let the strongly fish-eating habit to reduce a diversity of native fishes in the lake.

넙치 배합사료의 어분 대체 단백질원으로서 대두박 이용성

  • 김윤숙;하재이;문태석;이상민
    • Proceedings of the Korean Society of Fisheries Technology Conference
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    • 2000.05a
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    • pp.259-260
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    • 2000
  • 넙치는 횟감으로 선호도가 높은 고급 어종으로 양식생산량이 꾸준히 증대되고 있는 주요양식 종이며, 단백질 요구량이 높은 육식성 어류이다. 배합사료의 단백질원으로서 가장 높은 비중을 차지하는 어분은 단백질 함량이 높고 필수아미노산 및 지방산이 골고루 갖춰진 양질의 단백질원이지만, 어획량의 변동으로 생산량이 불안정하기 때문에 영양소 조성, 소화율, 가격, 공급의 안정성 및 대상 어종의 기호성 등을 고려하여 어분을 대체할 수 있는 단백질원의 개발이 시급하다. 어분의 대체 단백질로 이용되는 원료 가운데 대두박은 아미노산 조성이 비교적 양호하고, 가격이 저렴할 뿐만 아니라 공급이 안정적이어서 여러 어종을 대상으로 활발히 연구되어 왔다. 따라서 경제적인 넙치 배합사료 개발의 일환으로 본 연구에서는 어분 대체 단백질원으로서 대두박의 이용성을 조사하였다. (중략)

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잘못된 식습관이 당뇨병을 부른다

  • 조영진
    • The Monthly Diabetes
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    • s.148
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    • pp.28-29
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    • 2002
  • 과거에는 채식이나 곡류위주의 식생활이었다. 하지만 현대는 식생활이 풍요로워지면서, 육식과 지방질을 지나치게 섭취하고 있다. 이와 함께 동물성 지방과 동물성 단백질의 지나친 섭취가 문제시 되고, 이러한 섭취생활은 당뇨병을 비롯한 각종만성질환을 유발시키는 요인이 되고 있다.

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Feeding Habits of Korean Dark Sleeper, Odontobutis interrupta in the Keumdang Cheon (Stream), Korea (금당천에 서식하는 얼록동사리(Odontobutis interrupta)의 식성)

  • Hwa-Keun Byeon
    • Korean Journal of Environment and Ecology
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    • v.37 no.3
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    • pp.198-208
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    • 2023
  • This study collected samples of Korean dark sleepers (Odontobutis interrupta) in the Keumdang Stream from March to November 2021 to investigate their feeding habits. The sizes were classified by age (1 year and 2 years old, and 3 years or older). The food organisms of O. interrupta included Isopoda, Amphipoda, and Decapoda of the Malacostraca, Ephemeroptera, Odonata, Hemiptera, Plecoptera, Coleoptera, Diptera, and Trichoptera belonging to the aquatic insect of Arthropoda (accounting for 86.6% of the population), Tubificida, Haplotaxida, and Rhynchobdellida belonging to the Clitellata of Annelida (accounting for 7.3%), Systellommatophora and Mesogastropoda belonging to the Gastropodo of Mollusca (accounting for 2.8%), fish (accounting for 3.3%), and fish eggs. Korean dark sleepers fed mostly on aquatic insects, fish, crustaceans, and annelids. Aquatic insects were the most important food source, with 70.1% of the population, 31.7% in biomass, and 72.6% in the index of relative importance. Korean dark sleepers were carnivorous in diet and belonged to the stalker in food intake characteristics and forms. A food migration was observed since less Diptera was found, and more fish, Decapoda, Trichoptera, and Odonata were found in the biomass of the feed consumed by larger species. Diptera (65.3%), Haplotaxida (14.5%), Ephemeroptera (7.0%), Diptera (58.6%), Ephemeroptera (24.5%), fish (4.8%) Diptera (30.1%), Ephemeroptera (20.4%), Isopoda (13.3%) were mainly fed in the autumn.

[ $^{210}Po$ ] Accumulation in the Pelagic Community of Yongil Bay, Korea (영일만 표영군집내의 $^{210}Po$ 축적)

  • SUH Hae-Lip;KIM Seong-Soo;GO You-Bong;NAM Ki Wan;YUN Sung Gyu;YOON Yang-Ho;JO Soo-Gun;HONG Jae-Sang
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.28 no.2
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    • pp.219-226
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    • 1995
  • A study was made of the concentration of the naturally occurring radionuclide $^{210}Po$ in seawater, plankton and fishes collected from Yongil Bay, Korea, in summer 1993. The mean value of the $^{210}Po$ concentration in sea water was determined to be about 1.9 mBq/l, with the proportion of the dissolved forms being about $46\%$. The mean $^{210}Po$ concentration factor in the centric diatom Skeletonema costatum, comprises > $95\%$ of the total phytoplankton cell number, was $7.6\times10^4$. Of five species of zooplankton examined, four species (two copepods and two mysids) had $^{210}Po$ concentrations in the range of $^{210}Po$ mBq/g dry weight. A copepod Labidocera bipinnata, however, was exceptional with a particularly high $^{210}Po$ level of 2,070 mBq/g. This indicates that L. bipinnata is primarily a raptorial feeder. The concentration of $^{210}Po$ in the pyloric caecum of pelagic fishes was 2,979-3,811 mBq/g, with the concentration factors of $3.4-4.3\times10^6$. The food chain concentration of $^{210}Po$ occurred as follows: phytoplankton < filter feeding copepods < omnivorous mysids < raptorial copepod < pelagic fishes.

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