On the evolution of commensalism in the Chironomidae

研究成果: ジャーナルへの寄稿コメント/討論

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 Commensalism is widespread among the Chironomidae. Animal hosts include the Ephemeroptera, Plecoptera, Trichoptera, Megaloptera, Hemiptera, Odonata, Diptera, Mollusca and fishes. In general, benthic organisms with relatively large body size and intermediate mobility appear to be chosen most frequently as hosts.  The evolutionary advantage of a commensal mode of life in the Chironomidae is discussed. Better feeding opportunity, increased mobility, protection from disturbance and reduced predation risk are likely to constitute the four aspects of major importance in establishing commensal relations. It is proposed that the Chironomidae have always been under the pressure of both limited mobility and high predation due mainly to their morphological characteristics. Under these circumstances commensalism is considered as a convenient strategy to solve both the mobility and predation problems at the same time. In particular, association with large‐sized hosts is thought to make the chironomid commensal less vulnerable to a variety of freshwater predators which are in general gape limited.  The evolutionary path to parasitism seems to have been more difficult in the Chironomidae, with fewer taxa being recorded as parasites than commensals. The parasitic mode of life requires that the benefit of feeding directly on the host's bodily resource exceeds the cost incurred in the form of reduced fitness of the host and hence a reduced host population, the situation that a limited number of ectoparasitic chironomid species appear to tolerate.

元の言語英語
ページ(範囲)481-489
ページ数9
ジャーナルFreshwater Biology
29
発行部数3
DOI
出版物ステータス出版済み - 1 1 1993

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commensalism
Chironomidae
commensal
predation
Megaloptera
Plecoptera
Odonata
Trichoptera
predation risk
Ephemeroptera
Mollusca
benthic organisms
parasitism
Hemiptera
body size
parasite
fitness
predator
predators
disturbance

All Science Journal Classification (ASJC) codes

  • Aquatic Science

これを引用

On the evolution of commensalism in the Chironomidae. / Tokeshi, Mutsunori.

:: Freshwater Biology, 巻 29, 番号 3, 01.01.1993, p. 481-489.

研究成果: ジャーナルへの寄稿コメント/討論

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