한국환경생태학회지 (Korean Journal of Environment and Ecology)

  • 제37권3호
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  • Pages.198-208
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  • 2023
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  • 1229-3857(pISSN)
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  • 2288-131X(eISSN)
한국환경생태학회 (Korean Society of Environment and Ecology)
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금당천에 서식하는 얼록동사리(Odontobutis interrupta)의 식성

Feeding Habits of Korean Dark Sleeper, Odontobutis interrupta in the Keumdang Cheon (Stream), Korea

  • 변화근 (서원대학교 생물교육과)
  • 투고 : 2023.03.27
  • 심사 : 2023.06.07
  • 발행 : 2023.06.30
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초록

얼록동사리의 식성 분석을 위해 금당천에서 2021년 3월부터 11월까지 채집을 하였고 크기는 연령별로(1년생, 2년생, 3년생 이상)로 구분하였다. 먹이생물은 절지동물(Arthropoda, 개체수 86.6%) 갑각강(Malacostraca, 연갑강)의 등각목(Isopoda), 단각목(Amphipoda), 십각목(Decapoda), 수서곤충(Aquatic insect)에 속하는 하루살이목(Ephemeroptera), 잠자리목(Odonata), 노린재목(Hemiptera), 강도래목(Plecoptera), 딱정벌레목(Coleoptera), 파리목(Diptera), 날도래목(Trichoptera), 환형동물(Annelida, 개체수 7.3%) 환대강(Clitellata)의 실지렁이목(Tubificida), 가시지렁이목(Haplotaxida), 부리거머리목(Rhynchobdellida), 연체동물(Mollusca, 개체수 2.8%)에 속하는 복족강(Gastropoda)의 수병안목(Systellommatophora)과 중복족목(Mesogastropoda), 척추동물에 속하는 어류(3.3%) 그리고 어란 등 다양하였다. 수서곤충, 어류, 갑각류, 환형동물 등을 주로 서식하였으며 수서곤충이 개체수에 있어 70.0%, 생체량은 31.7%, 상대중요성지수는 72.7%로 가장 중요한 먹이원이었다. 식성은 육식성 이었으며 먹이 섭취 특성과 형태는 육식포식자(stalker)에 속하였다. 전장이 증가함에 따라 섭식한 먹이의 개체량과 생체량에 있어 파리류가 점진적으로 감소하였고 어류, 새우류, 날도래류, 잠자리류 등이 증가하는 먹이 전환이 발생하였다. 봄에는 먹이생물 중 파리류(65.3%), 지렁이류(14.5%), 하루살이류(7.0%) 등을 주로 섭식하였고 여름에는 파리류(58.6%), 하루살이류(24.5%), 어류(4.8%) 등이 풍부하였고 가을에는 파리류(30.1%), 하루살이류(20.4%), 등각류(13.3%) 등을 많이 섭식하였다.

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.

키워드

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