Animal Cognition, Год журнала: 2021, Номер 25(3), С. 495 - 507
Опубликована: Ноя. 24, 2021
Язык: Английский
Ibis, Год журнала: 2022, Номер 164(4), С. 1104 - 1122
Опубликована: Апрель 23, 2022
Reintroduction has often been used as a technique for re‐establishing self‐sustaining animal populations that have become extinct within their indigenous range. To achieve conservation success, it is essential to accurately assess the demographic parameters and IUCN Red List criteria of population. However, acquiring data on all indicators estimating according established definitions can be challenging. Here, we developed an integrated population model (IPM) viability analysis (PVA) framework estimate reintroduced Crested Ibis Nipponia nippon , project dynamics under range release scenarios Sado Island, Japan. Our IPM‐PVA roost count mark–resight 415 released 203 wild‐hatched individuals, well reproductive performance total 575 pairs. We aimed survival, size, number mature individuals projection. In first year after release, estimated apparent annual survival rate was 0.566 [Bayesian credible intervals (CRI) 0.518–0.614]; however, this increased 1 (0.865; CRI 0.836–0.892). Wild‐hatched juveniles exhibited high (0.757; 0.670–0.838) just lower than adults (0.899; 0.844–0.949). The success varied with pair attributes (released–released pair: 0.245, 0.194–0.299; released–wild 0.377, 0.281–0.471; wild–wild 0.350, 0.237–0.471). Total size 457 (CRI 384–525), 261 211–304) in June 2021. probability extinction next five generations 0%, even if discontinued. comprehensive case study demonstrated effectiveness evaluation ongoing reintroduction programmes.
Язык: Английский
Процитировано
7
Animals, Год журнала: 2024, Номер 14(3), С. 403 - 403
Опубликована: Янв. 26, 2024
The bearded vulture (Gypaetus barbatus) is an endangered species with a specialist osteophagous (bone) diet. We estimated the survival and productivity of this in Aragonese Pyrenees, where main population Europe found. used database covering period 33 years (1987–2020). To estimate probability survival, we Cormack–Jolly–Seber models Bayesian approach. Our rate 0.90 ± 0.08 juveniles, 0.95 0.04 subadults 0.92 0.05 adults. increased over study adults but not juveniles. By contrast, decreased same period. provides updated information on status two demographic parameters great importance to allows us identify most vulnerable age classes plan conservation actions improve situation territory that donor specimens for reintroduction projects. values suggest more caution should be exercised when planning these feeding points according use makes them.
Язык: Английский
Процитировано
1
Ecosphere, Год журнала: 2024, Номер 15(8)
Опубликована: Авг. 1, 2024
Abstract Restoring ecological dynamics is a key objective of conservation translocations. Exemplarily, reconnecting the reintroduced alpine populations with native Pyrenean through re‐establishing locally extinct in between, Causses and Pre‐Alps, major goal for long‐term Bearded Vultures Europe. Understanding Vultures' post‐release movements foraging behavior critical to understanding settlement newly restored supporting measures. The telemetric monitoring 43 translocated wild‐born juveniles allowed us investigate whether differences exist during first year life between populations. Medium‐ long‐distance exploration start spring following fledging both individuals. However, birds most distant release site (Causses) exhibited greater distances no clear directional movement pattern, had smaller home ranges, stronger preference supplementary feeding stations than those from other Although some Pre‐Alps displayed similar behaviors, pattern not as strong Causses, likely because proximity breeding Alps or number management stations. Preference (SFS) mostly occurred populations, but was lower Causses. Seasonal variations SFS were consistent among peak fledging. Beyond documenting Vultures, we suggest better accounting demographic consequences behaviors track translocation effectiveness, at local regional scales.
Язык: Английский
Процитировано
1
Journal of Avian Biology, Год журнала: 2024, Номер unknown
Опубликована: Окт. 17, 2024
Understanding population dynamics requires estimation of demographic parameters like mortality and productivity. Because obtaining the necessary data for such can be labour‐intensive in field, alternative approaches that estimate from existing useful. High‐resolution biologging are frequently available large‐bodied bird species used to survival We extend present a freely tool (‘NestTool') uses GPS tracking at hourly resolution important productivity as home range establishment, breeding initiation, success. NestTool first extracts 42 movement metrics time spent within user‐specified radius, number revisits, size, distances between most day night locations raw each individual season. These variables then three independent random forest models predict whether individuals exhibited behaviour, initiated nesting attempt, successfully raised fledglings. demonstrate use by training with 258 red kites Milvus milvus Switzerland tracked up 7 years, applied those different kite populations Germany where detailed observations nests their outcomes existed validation. The achieved > 90% accurate classification behaviour validation data, but slightly lower (80–90%) accuracy classifying outcome attempts, because some returned despite having failed. provides graphical user interface allows users manually annotate seasons which model predictions exceed user‐defined threshold uncertainty. will facilitate inform assessments, we encourage ornithologists test species.
Язык: Английский
Процитировано
1
Animal Cognition, Год журнала: 2021, Номер 25(3), С. 495 - 507
Опубликована: Ноя. 24, 2021
Язык: Английский
Процитировано
8