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001-es BibID:	BIBFORM113208
035-os BibID:	(cikkazonosító)e02522 (WoS)001017591600001 (Scopus)85160447206
Első szerző:	Engel, Noémie
Cím:	Long-term decline in nest survival of a ground-nesting shorebird on a tropical island / Noémie Engel, Grant McDonald, Brett K. Sandercock, Romy Rice, Rocio Moreno, Sara Ratāo, Tamás Székely
Dátum:	2023
ISSN:	2351-9894
Megjegyzések:	Tropical islands harbour a disproportionally high number of endemic species, which face increasing threats due to habitat loss, disturbance and introduced alien predators. Long-term demographic studies are needed to understand how such threats may impact on population productivity. We report an investigation of a key demographic parameter, nest survival, over a 13-year period in a small ground-nesting shorebird on the island of Maio (Cabo Verde). Similar to many tropical islands, Maio is expected to face increased tourism, disturbance, and potential loss of nesting habitats. We monitored over 700 nests of the largest, year-round resident breeding population of Kentish plover in the Atlantic Ocean archipelago. Our work produced three important findings. First, we show that nest survival differed among the major habitats of the main breeding site, the Salinas do Porto Ingles, because nests in the salt-extraction area had higher daily survival rates DSR = 0.9654 & PLUSMN; 0.0076 SE than nests in grasslands DSR = 0.9557 & PLUSMN; 0.0038 SE. The salt-extraction is a dynamic habitat that is naturally regulated by rainfall and sea water inflow and managed with traditional methods for salt-extraction. Kentish plovers breed on small islets surrounded by salty water where mammalian predators may have restricted access. Second, we found that breeding densities of plovers decreased from 0.11 nests/ha to 0.03 nests/ ha over 13 years. Last, we show that nest survival declined from 0.9784 & PLUSMN; 0.0107 in 2007 to 0.8967 & PLUSMN; 0.0401 in 2019. We suggest that the declining breeding density and nest survival may be driven by a combination of ecological factors including predation by native and introduced species, and by increased human disturbance. To help maintain sustainable levels of nest survival and to ensure long-term persistence of this Kentish plover population, we propose to incorporate traditional Salinas management into direct conservation actions, to reduce human disturbance and manage nest predators to help nest survival on tropical islands.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Global Ecology and Conservation. - 45 (2023), p. 1-12. -
További szerzők:	McDonald, Grant C. Sandercock, Brett K. Rice, Romy Moreno, Rocio Ratão, Sara S. Székely Tamás (1959-) (biológus)
Pályázati támogatás:	FK 134741 OTKA/ NKFIH ELVONAL-KKP 126949 NKFIH
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM106954
035-os BibID:	(Wos)000615948300006 (Scopus)85098499912
Első szerző:	Kerekes Viola
Cím:	Trends in demography, genetics, and social structure of Przewalski's horses in the Hortobagy National Park, Hungary over the last 22 years / Viola Kerekes, István Sándor, Dorina Nagy, Katalin Ozogány, Loránd Göczi, Benjamin Ibler, Lajos Széles, Zoltán Barta
Dátum:	2021
ISSN:	2351-9894
Megjegyzések:	The world population of Przewalski`s horses has recovered from very few survivors, and is still categorized as ?Endangered" in the IUCN Red List of Threatened Species. For this reason, the maintenance of genetically valuable populations is highly important. The 3000 ha Pentezug Reserve in Hortobagy National Park, Hungary, was home to 270 Przewalski`s horses at the end of 2018, approximately 30% of the total European population. In this study, we show the main changes in demographic, genetic, and social characteristics of the population since the establishment of the reserve in 1997. The first years clearly demonstrated that the steppe ecosystem and the wetlands in this area were ideal for the population. We observed that the growing number of individuals affected the total number of harems, but not the average size of the harems. Remarkably, a new phenomenon, herd formation, also appeared. The number of foals per year increased for 17 years (the zenith was in 2014, N ? 60 per year) then started to decrease due to both non-human factors (e.g. delay in female fecundity and decreasing foaling rate) and human intervention (e.g. immunocontraception treatment). The total number of horses peaked in 2017 (N ? 328) and in 2018 decreased (N ? 276) due to decreasing foaling rate, exports, and a population crash. The inbreeding coefficient increased slightly after 2012, while gene diversity stabilized at a relatively high value. Today many individuals from this well-monitored population can be found in Russia and Mongolia. Collectively, understanding of the social structure and mechanisms of population self-control in Przewalski`s horses is improved by our observations. From a population management point of view, our study highlights the importance of human interventions for birth-control and interactions between Przewalski`s horse projects in different countries.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Equus ferus przewalskii Conservation management Harem Home range Birth control Fertility control
Megjelenés:	Global Ecology and Conservation. - 25 (2021), p. e01407. -
További szerzők:	Sándor István Nagy Dorina Ozogány Katalin (1982-) (biológiai fizikus) Göczi Loránd (1993-) (PhD Hallgató) Ibler, Benjamin Széles Lajos (1971-) (molekuláris biológus) Barta Zoltán (1967-) (biológus, zoológus)
Pályázati támogatás:	NKFIH-1150-6/2019 Egyéb FK 123880 Egyéb
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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