LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 18

Search options

  1. Article: Seasonal nomadism and pre-breeding scouting forays of a Spotted Sandgrouse (Pterocles senegallus)

    Gur, Elon / Sapir, Nir / Hatzofe, Ohad / Ovadia, Ofer

    Wilson journal of ornithology. 2021 Sept. 14, v. 132, no. 4

    2021  

    Abstract: Nomadism is a type of movement lacking fixed spatiotemporal patterns, evident in species inhabiting variable environments. The irregular movement characterizing nomadic species often acts as a challenging barrier for scientists investigating their ... ...

    Title translation Nomadismo estacional y movimientos prerreproductivos de exploración de una ganga Pterocles senegallus
    Abstract Nomadism is a type of movement lacking fixed spatiotemporal patterns, evident in species inhabiting variable environments. The irregular movement characterizing nomadic species often acts as a challenging barrier for scientists investigating their ecology. We provide an insight on the movement of a nomadic desert bird, the Spotted Sandgrouse (Pterocles senegallus), within and between different activity seasons. The data were obtained from 1 individual fitted with a satellite transmitter, which was tracked for ∼2.5 years. Three main activity seasons were detected during which the bird stayed in a specific area: pre-breeding, breeding, and winter. Nomadic behavior was evident during the pre-breeding and breeding seasons, whereas site fidelity was observed during winter (i.e., seasonal nomadism). Local scale fidelity with respect to roosting behavior was also evident among and within the 3 winters of tracking. Field observations carried out during the first breeding season enabled us to link the movement patterns of the bird with its behavior at different phases of the breeding season. Within and between activity seasons, the bird was engaged in short- and long-distance scouting forays. The long-distance ones occurred only during the pre-breeding season. In some of the scouting forays, the bird arrived at sites it had previously utilized, suggesting the existence of spatial memory and navigation capability. This fine-scale description of movement can uncover key features, which allow the survival and reproduction of nomadic birds inhabiting arid areas where the distribution of resources is largely unpredictable.
    Keywords birds ; ecology ; migratory behavior ; ornithology ; philopatry ; satellites ; spatial memory ; winter
    Language English
    Dates of publication 2021-0914
    Size p. 1014-1019.
    Publishing place Wilson Ornithological Society
    Document type Article
    ZDB-ID 2256217-5
    ISSN 1938-5447 ; 1559-4491
    ISSN (online) 1938-5447
    ISSN 1559-4491
    DOI 10.1676/1559-4491-132.4.1014
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  2. Article ; Online: Early and accumulated experience shape migration and flight in Egyptian vultures.

    Efrat, Ron / Hatzofe, Ohad / Mueller, Thomas / Sapir, Nir / Berger-Tal, Oded

    Current biology : CB

    2023  Volume 33, Issue 24, Page(s) 5526–5532.e4

    Abstract: Two types of experience affect animals' behavioral proficiencies and, accordingly, their fitness: early-life experience, an animal's environment during its early development, and acquired experience, the repeated practice of a specific task. ...

    Abstract Two types of experience affect animals' behavioral proficiencies and, accordingly, their fitness: early-life experience, an animal's environment during its early development, and acquired experience, the repeated practice of a specific task.
    MeSH term(s) Animals ; Egypt ; Flight, Animal ; Birds ; Falconiformes ; Raptors ; Animal Migration
    Language English
    Publishing date 2023-12-01
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1071731-6
    ISSN 1879-0445 ; 0960-9822
    ISSN (online) 1879-0445
    ISSN 0960-9822
    DOI 10.1016/j.cub.2023.11.012
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: A lifetime track of a griffon vulture: The moving story of Rehovot (Y64).

    Acácio, Marta / Anglister, Nili / Vaadia, Gideon / Harel, Roi / Nathan, Ran / Hatzofe, Ohad / Spiegel, Orr

    Ecology

    2023  Volume 104, Issue 4, Page(s) e3985

    MeSH term(s) Animals ; Birds ; Falconiformes
    Language English
    Publishing date 2023-02-16
    Publishing country United States
    Document type Journal Article ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, Non-U.S. Gov't
    ZDB-ID 2010140-5
    ISSN 1939-9170 ; 0012-9658
    ISSN (online) 1939-9170
    ISSN 0012-9658
    DOI 10.1002/ecy.3985
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article: Postrelease survival of captive-bred Egyptian Vultures is similar to that of wild-hatched Egyptian Vultures and is not affected by release age or season

    Efrat, Ron / Hatzofe, Ohad / Miller, Ygal / Mueller, Thomas / Sapir, Nir / Berger-Tal, Oded

    Condor. 2022 Jan. 28, v. 124, no. 2

    2022  

    Abstract: Reintroducing species to their historic range or reinforcing extant but endangered populations with individuals from elsewhere are popular conservation efforts to maintain long-term viable populations of animals. These efforts, known as conservation ... ...

    Title translation La supervivencia postliberación de individuos de Neophron percnopterus criados en cautiverio es similar a la de individuos criados en libertad y no se ve afectada por la edad o la temporada de liberación
    Abstract Reintroducing species to their historic range or reinforcing extant but endangered populations with individuals from elsewhere are popular conservation efforts to maintain long-term viable populations of animals. These efforts, known as conservation translocations, require proper monitoring of the fate of the animals that are released to assess their success. Nevertheless, effective monitoring is often missing in conservation translocations. Here, we assessed the efficiency of different monitoring methods and estimated survival of captive-bred Egyptian Vultures (Neophron percnopterus) that were released to the wild during the first 15 years of a reintroduction project in Israel. First, we inspected data obtained from different monitoring methods and compared observations of color rings and wing tags to location data from GPS transmitters. Then, we used GPS data to estimate apparent survival of vultures that were released to the wild at different ages and different seasons. Finally, we compared the apparent survival of captive-bred and wild-hatched Egyptian Vultures. We show that only a relatively small portion of the birds were visually observed through color rings and wing tags, compared to those for which data were obtained from GPS transmitters. Using data obtained via GPS transmitters we were able to show that release age and season did not alter apparent survival. In addition, we found no differences in apparent survival between captive-bred and wild-hatched Egyptian Vultures during their first migration or during their first two years postrelease or postfledging. Our results show the importance of continuous and effective monitoring and confirm the efficacy of captive-breeding and release of Egyptian Vultures as a conservation tool. We recommend the continuation of monitoring using GPS transmitters, alongside increased observation-based monitoring efforts. LAY SUMMARY Conservation translocations (e.g., reintroduction) are a conservation tool aiming to reverse the negative population trend of species at risk. Effective monitoring is required to assess the success of conservation translocations. We compared different monitoring schemes implemented over 15 years of an Egyptian Vulture reintroduction project in Israel. We then used GPS data to estimate apparent survival of the released captive-bred vultures. Monitoring vultures using color rings and wing tags provided few survival data compared to that obtained from GPS transmitters. GPS data suggest that release protocols did not affect the vultures' apparent survival and that captive-bred vultures' survival was not lower than that of wild-hatched ones during their first two years in the wild.
    Keywords Neophron percnopterus ; artificial rearing ; color ; risk ; Israel
    Language English
    Dates of publication 2022-0128
    Size p. 1-10.
    Publishing place University of California Press
    Document type Article
    ISSN 2732-4621
    DOI 10.1093/ornithapp/duab065
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  5. Article ; Online: Translating large-scale prioritization models for vultures to local-scale decision-making: response to Santangeli et al. 2019.

    Efrat, Ron / Hatzofe, Ohad / Berger-Tal, Oded

    Conservation biology : the journal of the Society for Conservation Biology

    2020  Volume 34, Issue 5, Page(s) 1305–1307

    MeSH term(s) Animals ; Birds ; Conservation of Natural Resources
    Language English
    Publishing date 2020-06-12
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Comment
    ZDB-ID 58735-7
    ISSN 1523-1739 ; 0888-8892
    ISSN (online) 1523-1739
    ISSN 0888-8892
    DOI 10.1111/cobi.13557
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article: Landscape‐dependent time versus energy optimizations in pelicans migrating through a large ecological barrier

    Efrat, Ron / Hatzofe, Ohad / Nathan, Ran

    Functional ecology. 2019 Nov., v. 33, no. 11

    2019  

    Abstract: During migration, birds are often forced to cross ecological barriers, facing challenges due to scarcity of resources and suitable habitats. While crossing such barriers, birds are expected to adjust their behaviour to reduce time, energy expenditure and ...

    Abstract During migration, birds are often forced to cross ecological barriers, facing challenges due to scarcity of resources and suitable habitats. While crossing such barriers, birds are expected to adjust their behaviour to reduce time, energy expenditure and associated risks. We studied the crossing of the Sahara Desert by the Great White Pelican (Pelecanus onocrotalus), a large wetland‐specialist. We focused on decisions made by migrating pelicans along different parts of the southbound autumn migration, their response to local environmental conditions and the implications for time and energy optimizations. We compared the observed pelicans' migration routes with simulated ‘direct‐pass’ (shortest, mostly across the desert) and ‘corridor‐pass’ (along the Nile River) routes, and used GPS, body acceleration and atmospheric modelling to compare flight behaviour along the Nile River versus the desert. The observed route was significantly shorter and faster than the simulated corridor‐pass route and not significantly different from the simulated direct‐pass one. Daily flights over the desert were longer than along the Nile River, with flying time extending to late hours of the day despite unfavourable atmospheric conditions for soaring–gliding flight. Moreover, the pelicans' behavioural response to atmospheric conditions changed according to the landscape over which they flew. Overall, the pelicans showed stronger behavioural adjustments to atmospheric conditions over the desert than along the Nile River. Our findings suggest that migrating pelicans primarily acted as time minimizers while crossing the Sahara Desert, whereas energetic optimization was only considered when it did not substantially compromise time optimization. The pelicans took the almost shortest possible route, only following the Nile River along its south‐oriented parts, and frequently staged overnight in the desert far from water, despite being large, wet‐habitat specialists. Correspondingly, their behavioural response to atmospheric conditions changed according to the landscape over which they were flying, switching between time (over the desert) and energy (over the Nile River) optimization strategies. Our results suggest that the interaction between landscape and atmospheric conditions depict a flexible, yet primarily time‐dominated, migration optimization strategy. A free Plain Language Summary can be found within the Supporting Information of this article.
    Keywords Pelecanus onocrotalus ; autumn ; birds ; energy expenditure ; environmental factors ; flight ; global positioning systems ; habitats ; landscapes ; models ; risk ; Nile River ; Sahara Desert
    Language English
    Dates of publication 2019-11
    Size p. 2161-2171.
    Publishing place John Wiley & Sons, Ltd
    Document type Article
    Note JOURNAL ARTICLE
    ZDB-ID 2020307-X
    ISSN 1365-2435 ; 0269-8463
    ISSN (online) 1365-2435
    ISSN 0269-8463
    DOI 10.1111/1365-2435.13426
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  7. Article: Commentary: Not All Vulture Feeding Stations are Supplementary—Proposed Terminology for Carcass Provisioning with Reference to Management Goals and Food Sources

    Duriez, Olivier / Andevski, Jovan / Bowden, Christopher G. R. / Camiña-Cardenal, Alvaro / Frey, Hans / Genero, Fulvio / Hatzofe, Ohad / Llopis-Dell, Alex / Néouze, Raphaël / Phipps, Louis / Tavares, José

    Journal of raptor research. 2022 Feb. 28, v. 56, no. 1

    2022  

    Abstract: Although vulture feeding stations are a widely used tool for vulture conservation in many regions worldwide, there has been some confusion about their functions and this is reflected in the range of terminology used. The origin of food supply at ... ...

    Title translation Comentario: No Todas las Estaciones de Alimentación de Buitres Son Suplementarias – Terminología Propuesta para El Aprovisionamiento de Cadáveres con Referencia a los Objetivos de Gestión y las Fuentes de Alimentos
    Abstract Although vulture feeding stations are a widely used tool for vulture conservation in many regions worldwide, there has been some confusion about their functions and this is reflected in the range of terminology used. The origin of food supply at provisioning sites (both for in situ and ex situ situations) and the goals of feeding station managers (ranging from purely conservation of vultures to the necessity for carcass disposal) are two key aspects that are often neglected. We review the definitions and nomenclature for the provision of predictable anthropogenic food for vultures and vultures' role in sanitation in the landscape. We propose that “supplementary feeding stations for vultures” (SFSV) defines a particular case and this term should only be applied when a station has vulture conservation goals and a food supply coming from outside of the landscape (ex situ). We introduce the term “recycling station with vultures” (RSV) for cases when the goal is the elimination of carcasses and the food is sourced in situ (natural, NRSV) or ex situ (supplementary food, SRSV). This clarification of goals and terminology for feeding stations worldwide could have important consequences for the understanding and assessment of vulture conservation and management actions, among researchers and conservationists and also importantly among stakeholders and wider society.
    Keywords birds of prey ; carcass disposal ; food availability ; landscapes ; sanitation ; stakeholders ; terminology ; vultures
    Language English
    Dates of publication 2022-0228
    Size p. 131-137.
    Publishing place Raptor Research Foundation
    Document type Article
    ZDB-ID 2458104-5
    ISSN 0892-1016
    ISSN 0892-1016
    DOI 10.3356/JRR-20-19
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  8. Article ; Online: Plasma cholinesterase activity: A benchmark for rapid detection of pesticide poisoning in an avian scavenger.

    Anglister, Nili / Gonen-Shalom, Shira / Shlanger, Peleg / Blotnick-Rubin, Edna / Rosenzweig, Ariela / Horowitz, Igal / Hatzofe, Ohad / King, Roni / Anglister, Lili / Spiegel, Orr

    The Science of the total environment

    2023  Volume 877, Page(s) 162903

    Abstract: Poisoning due to exposure to organophosphate and carbamate pesticides is a common threat for many wildlife species, especially for scavengers such as vultures. The Griffon vulture population (Gyps fulvus), for instance, is deteriorating in the Eastern ... ...

    Abstract Poisoning due to exposure to organophosphate and carbamate pesticides is a common threat for many wildlife species, especially for scavengers such as vultures. The Griffon vulture population (Gyps fulvus), for instance, is deteriorating in the Eastern Mediterranean, and is considered to be critically endangered in Israel, where 48 out of 107 (45 %) known injury/mortality cases in 2010-2021 were caused by poisoning. Lack of specific clinical indications, together with levels of organophosphate or carbamate pesticides too low to detect, challenge the ability to diagnose and treat such poisoning events. The activity of cholinesterase (ChE) in plasma has the potential to serve as an effective biomarker for monitoring exposure to anticholinesterase pesticides in live vultures. Yet, the applicability of this approach has been limited by intra- and inter-species variations in ChE basal levels. The present study aims to provide a benchmark for ChE activity levels in healthy Griffons and their intra-species variation. Blood samples from free-roaming (n = 231) and captive (n = 63) Griffons were collected during routine monitoring, and ChE levels were determined using a colorimetric method. We established that the ChE in the plasma of Griffons reflects mostly acetylcholinesterase as the dominant form. ChE levels in healthy Griffons are 0.601 ± 0.011 U/ml (mean ± SE), while Griffons with suspected or confirmed pesticide poisoning display much lower levels of ChE activity (typically <0.3 U/ml). We also characterized the age dependence of ChE activity, as well as differences among groups from different locations or origins. Our study provides a rapid diagnostic tool for the detection of exposure to organophosphate and carbamate pesticides that should facilitate the lifesaving treatment and the conservation of this species. Moreover, our protocols can be adapted to other species and geographical areas, addressing pesticide poisoning worldwide and contributing to the protection of endangered species and their ecological functions (e.g. sanitation by scavengers).
    MeSH term(s) Animals ; Acetylcholinesterase ; Benchmarking ; Pesticides ; Cholinesterases ; Birds ; Carbamates ; Organophosphates ; Falconiformes
    Chemical Substances Acetylcholinesterase (EC 3.1.1.7) ; Pesticides ; Cholinesterases (EC 3.1.1.8) ; Carbamates ; Organophosphates
    Language English
    Publishing date 2023-03-17
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2023.162903
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article: Israel’s breeding avifauna: A century of dramatic change

    Yom-Tov, Yoram / Hatzofe, Ohad / Geffen, Eli

    Biological conservation. 2012 Mar., v. 147, no. 1

    2012  

    Abstract: During the course of the 20th century many changes took place in the area encompassing Israel and the Palestinian Authority (hereafter Israel; ca. 28,000km2): the human population grew from ca. 650,000 inhabitants during 1900–1903 (Rupin, 1920) to ca. 10 ...

    Abstract During the course of the 20th century many changes took place in the area encompassing Israel and the Palestinian Authority (hereafter Israel; ca. 28,000km2): the human population grew from ca. 650,000 inhabitants during 1900–1903 (Rupin, 1920) to ca. 10 million in 2008, i.e. a 16-fold increase. This population increase was accompanied by an increase in land use for human needs – agriculture, aquaculture, forestry, construction of buildings and roads, etc., and a dramatic rise in the standard of living. Here we compare the status (distribution and abundance) of the 227 bird species that are breeding or have bred in Israel from the beginning of the 20th century to the present day. For each species we documented the environmental factors presumed to have affected it, and examined the effects of taxonomic order, body mass, diet, world and local distribution and nest location on the status of the avifauna. We found that 73.6% of the bird species breeding in Israel had undergone a change in their status during the studied period. While several of the examined factors were significantly related to the observed changes, some of them were also interrelated to some degree, making it difficult to single out the factor responsible for a particular change. The main reasons for the changes were nonetheless assessed as habitat change, introduction of invasive species and poisoning. Habitat change had many forms, most of which are related to agriculture, including irrigation, aquaculture and construction of water reservoirs; but also included afforestation, preservation of the natural forest, urbanization, gardening and the introduction of exotic plants. Habitat change was responsible for a population decline in 64 species and population increase in 62 species. Thirteen species, mostly Falconiformes, were impacted by poisoning. Sixteen invasive species, all of tropical origin, were introduced, of which seven were Psittaciformes. Although changes occurred throughout the country, the birds inhabiting the Mediterranean region were more affected than those inhabiting the desert region, reflecting the denser human population in the former region.
    Keywords Ciconiiformes ; Psittaciformes ; afforestation ; aquaculture ; biopreservatives ; birds ; breeding ; deserts ; diet ; environmental factors ; forests ; habitats ; human population ; introduced plants ; invasive species ; irrigation ; land use ; nests ; population growth ; road construction ; urbanization ; water reservoirs ; Israel ; Mediterranean region
    Language English
    Dates of publication 2012-03
    Size p. 13-21.
    Publishing place Elsevier Ltd
    Document type Article
    ISSN 0006-3207
    DOI 10.1016/j.biocon.2012.01.005
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  10. Article ; Online: Anticipating the effects of climate warming and natural habitat conversion on waterbird communities to address protection gaps

    Verniest, Fabien / Le Viol, Isabelle / Julliard, Romain / Dami, Laura / Guelmami, Anis / Suet, Marie / Abdou, Wed / Azafzaf, Hichem / Bendjedda, Nadjiba / Bino, Taulant / Borg, John J. / Božič, Luka / Dakki, Mohamed / El Hamoumi, Rhimou / Encarnação, Vítor / Erciyas Yavuz, Kiraz / Etayeb, Khaled / Georgiev, Valeri / Hamada, Ayman /
    Hatzofe, Ohad / Ieronymidou, Christina / Langendoen, Tom / Mikuska, Tibor / Molina, Blas / Moniz, Filipe / Moussy, Caroline / Ouassou, Asmaâ / Petkov, Nicky / Portolou, Danae / Qaneer, Tareq / Sayoud, Samir / Šćiban, Marko / Topić, Goran / Uzunova, Danka / Vine, Gal / Vizi, Andrej / Xeka, Erald / Zenatello, Marco / Gaget, Elie / Galewski, Thomas

    Biological Conservation. 2023 Mar., v. 279 p.109939-

    2023  

    Abstract: Thermal adjustment of waterbird communities to climate warming is crucial but hampered by natural habitat conversion, increasing their climatic debt. As it is, in contrast, facilitated in protected areas, assessing the adequacy of the current protected ... ...

    Abstract Thermal adjustment of waterbird communities to climate warming is crucial but hampered by natural habitat conversion, increasing their climatic debt. As it is, in contrast, facilitated in protected areas, assessing the adequacy of the current protected areas network with respect to future climate and land-use changes and identifying priority sites to protect is of major importance. In this study, we assess the thermal adjustment limitations that non-breeding waterbird communities might experience by the end of the 21st century in the Mediterranean region to highlight priorities for wetland protection. Priorities were set by combining the exposure of waterbird communities to natural habitat conversion and climate warming with their thermal specialization. The latter was calculated using winter abundance data of 151 species from 2932 sites of the International Waterbird Census in 21 Mediterranean countries. Exposure was assessed using future projections of temperature and land-use under four CMIP6 scenarios (SSP1–2.6, SSP2–4.5, SSP3–7.0, and SSP5–8.5). We found that strictly protected areas are located in wetlands whose waterbird communities, without protection, would likely experience high limitations in thermal adjustment in the coming decades. This highlights that the location of existing protected areas may effectively support the thermal adjustment of waterbird communities to future climate warming. However, 490 sites considered at risk lack protection, including 32 sites of international importance for waterbirds, stressing the need to strengthen the protected areas network in these sites in priority. Our study provides important guidance for conservation planning in the Mediterranean region to support waterbird responses to climate change.
    Keywords climate ; climate change ; debt ; habitats ; land use ; risk ; temperature ; water birds ; wetlands ; Mediterranean region ; Community thermal adjustment ; Conservation planning ; International Waterbird Census ; Ramsar convention
    Language English
    Dates of publication 2023-03
    Publishing place Elsevier Ltd
    Document type Article ; Online
    ISSN 0006-3207
    DOI 10.1016/j.biocon.2023.109939
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

To top