EU-protected slug Geomalacus maculosus and sympatric Lehmannia marginata in conifer plantations: what does mark-recapture method reveal about population densities?
Geomalacus maculosus Allman, 1843 is an EU-protected slug species which is only found in the west of Ireland and northern Iberia. There is little knowledge of its population sizes throughout its range and no long-term studies have been conducted to calculate estimates. Localized populations of G. maculosus and the sympatric slug Lehmannia marginata (Muller, 1774) were monitored over one year using the mark-recapture approach at five different sites within a commercial conifer plantation in Ireland. Slugs were marked using visible-implant elastomers injected into the foot. Up to 23.9 /m 2 ( G. maculosus ) and 5.6 /m 2 ( L. marginata ) specimens were observed during the first survey in August; however, these densities varied greatly in different areas of the plantation and throughout the year. Population-size estimates were also calculated using the Jolly-Seber method. Temperature was significantly correlated with capture success, with fewer captures during the colder months. This is the first long-term study that uses visible-implant elastomers as markers for slugs and we evaluate their use, provide guidelines for trapping intensity, discuss limitations of the mark-recapture method and advise on the optimal survey time and conditions.
- 원문이 없습니다.
유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.
NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.
- 이 논문과 함께 출판된 논문 + 더보기