caa a22 4500 463175808 CHVBK 20180406164825.0 cr unu---uuuuu 170326e20071201xx s 000 0 eng 10.1007/s10336-007-0204-7 doi (NATIONALLICENCE)springer-10.1007/s10336-007-0204-7 How important are intrinsic factors to natal recruitment in Short-tailed Shearwaters Puffinus tenuirostris ? [Elektronische Daten] [Catherine Meathrel, Mark Carey] Although many extrinsic factors affecting recruitment in Short-tailed Shearwaters Puffinus tenuirostris have been studied continuously on Fisher Island, Tasmania, since 1947, the need to minimise disturbance in this colony has meant that little is known of the role of intrinsic factors in recruitment for this population of long-lived seabirds. Intensive studies into the intrinsic factors (i.e. parental quality, egg size and the size and weight of chicks prior to fledging) affecting recruitment were initiated in 1994 on nearby Great Dog Island. Herein, we present preliminary data on the recruits from three cohorts from which all were assumed to have returned (i.e. 1993/1994, 1994/1995 and 1995/1996) by the 2004/2005 breeding season. Although the number of recruits was limited, those that did return to breed were from eggs that were 7% larger than those that did not. There were only weak relationships between parental quality, the size and weight of the egg and the chick at 2months of age. None of these intrinsic factors seemed to explain why some chicks returned to prospect and breed, while others did not. Despite the large number of adults, eggs and chicks used in this study, powerful multivariate statistical analyses were unable to detect which intrinsic factors could be important to recruitment in this species. Hence, we suggest, alternatively, that extrinsic, density-independent factors operating outside the breeding season and away from the Bass Strait islands may determine whether or not a chick survives to return to breed. Clearly, more information is required on the biology of this species whilst at sea, particularly factors that may affect juvenile survival. Dt. Ornithologen-Gesellschaft e.V., 2007 Seabirds nationallicence Shearwaters nationallicence Recruitment nationallicence Long-lived nationallicence Subadult at sea mortality nationallicence Parental quality nationallicence Meathrel Catherine Department of Environmental Management and Ecology, La Trobe University, 3690, Wodonga, VIC, Australia aut Carey Mark Department of Environmental Management and Ecology, La Trobe University, 3690, Wodonga, VIC, Australia aut Journal of Ornithology Springer-Verlag 148(2007-12-01), 385-393 0021-8375 148<385 2007 148 10336 https://doi.org/10.1007/s10336-007-0204-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10336-007-0204-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Meathrel Catherine Department of Environmental Management and Ecology, La Trobe University, 3690, Wodonga, VIC, Australia aut NATIONALLICENCE 700 1- Carey Mark Department of Environmental Management and Ecology, La Trobe University, 3690, Wodonga, VIC, Australia aut NATIONALLICENCE 773 0- Journal of Ornithology Springer-Verlag 148(2007-12-01), 385-393 0021-8375 148<385 2007 148 10336 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer