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사육상태 황새(Ciconia boyciana)의 먹이 선호도 실험
Experiment of Foraging Preference in Oriental Storks (Ciconia boyciana) in Captivity
- 언어ENG
- URLhttps://db.koreascholar.com/Article/Detail/320076
pp.91-95
Foraging preference in prey size and type is influenced by a variety of factors including energy requirements, season-dependent food availability, and social context (e.g. competition and predation risk). The oriental stork (Ciconia boyciana) is known as a wetland forager that inhabits human-managed wetlands such as paddy fields while breeding. However, it became an internationally endangered species. Information on its foraging preference is anticipated to play an important role in maintaining storks in captivity with a variety of food types as well as managing the food availability in foraging habitats of reintroduction sites. Specifically, the present study investigated the patterns of foraging preference of the subject in captivity as a partial study of the prerelease training and habitat management programs prior to reintroduction. The observations of foraging behavior of breeding adult storks included foraging preference in prey size (i.e. small, less than 6 cm, vs. large, larger than 6 cm, mudfish) during the incubation and nestling periods (March to April of 2009~2010) and prey type (i.e. mudfish, Misgurnus spp., crickets, Gryllus spp., and earthworms, Lumbricus spp.) during the postnesting period (October of 2009~2010). Our results indicated that storks in captivity not only preferred large to small mudfish independent of breeding stage but also preferred mudfish to crickets and earthworms. To our knowledge, captive storks did not appear to be constrained by providing offspring with various mudfish size and were likely dependent on mudfish, suggesting that a mudfish population in paddy fields should be monitored and managed for the main food resource for breeding storks prior to reintroduction.
