Male-biased investment during chick rearing in the Griffon Vulture <i>Gyps fulvus</i>

Yaniv-Feller, Sigal; Orchan, Yotam; Bahat, Ofer; Motro, Uzi

doi:10.1080/00063657.2018.1476461

Cited by 10 publications

(5 citation statements)

References 15 publications

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“…While Arrondo 10 reported a lower survival for males in northern Spain (0.78 ± 0.07), in addition or interaction with the modelled human footprint, no differences have been detected between sexes according to ranging or foraging behavior. 55,29,30 Recently, Yaniv-Feller 56 showed male-biased investment in the griffon vulture, with a higher mean nestling provisioning rate and time spent attending the nest, although this research was restricted only to the chick-rearing phase. Also, Xirouchakis and Mylonas 57 appraised that griffon vultures males contributed significantly more to the delivery of grass and branches to build the nest, while females took charge more of manipulating such material to build the nest.…”

Section: Discussionmentioning

confidence: 99%

Survival of a small reintroduced griffon vulture population in the Apennines: Insights from Global Positioning System tracking

Monti

Serroni

Rotondaro

et al. 2022

Avian Biology Research

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Conservation translocations ( e. g., restocking, reintroductions) represent efficient tools to prevent the extinction or favouring the return of previously extirpated populations into the wild. Evaluating demographic parameters of translocated populations is a key issue to assess and monitor their conservation status and to provide evidences useful to implement management actions aimed at long-term conservation results. We report first data on survival estimates and related mortality causes for a reintroduced population of Eurasian griffon vultures ( Gyps fulvus) in the central-southern Apennine, Italy, from satellite telemetry data. Twenty vultures have been fitted with solar-powered Global Positioning System (GPS) tags in Pollino National Park (PNP, southern Italy, N = 9) and Monte Velino Reserve (MVR, central Italy, N = 11). Survival has been estimated on a total amount of 173,568 GPS fixes from December 2016 to October 2020 (1415 days) using the Fleming-Harrington estimator. Five, out of 20 vultures, died by poisoning (40%), collision with wind turbines (20%) and of unknown causes (40%). Two birds dispersed from MVR to France (though they later came back) and one from PNP to Croatia. Estimated survival rate across the whole study period was 0.709 (±0.11, SE; 0.523–0.961, 95% CI), and annual survival rate was 0.915 (±0.06, SE; 0.846–0.990, 95% CI). No significant differences in survival rates have been detected according to sex or age. As mortality in our study was mainly human-caused, we urge relevant institutions and agencies to strengthen and effectively establish anti-poison strategies, as well as implementing mitigation and prevention measures for the existing and planned wind farms. The establishment of a long-term viable population in the central-southern Apennines will depend upon both lower levels of human-caused mortality and habitat preservation.

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Section: Discussionmentioning

confidence: 99%

Survival of a small reintroduced griffon vulture population in the Apennines: Insights from Global Positioning System tracking

Monti

Serroni

Rotondaro

et al. 2022

Avian Biology Research

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“…2008, Yaniv‐Feller et al . 2018). During the study period (1979–2018), 197 nests were monitored, all of them located in the western part of Sardinia (Fig.…”

Section: Methodsmentioning

confidence: 99%

“…The incubation period is approximately 55 days, and both sexes incubate, feed, brood and shade the nestling (Cramp 1985, Xirouchakis 2010. The young leave the nest at an age of 110-120 days and continue to receive food from their parents for about 3 months after fledging (Schenk et al 2008, Yaniv-Feller et al 2018. During the study period , 197 nests were monitored, all of them located in the western part of Sardinia (Fig.…”

Section: Nest Datamentioning

confidence: 99%

Modelling the effect of environmental variables on the reproductive success of Griffon Vulture (Gyps fulvus) in Sardinia, Italy

Aresu¹,

Pennino

Rosa

et al. 2021

Ibis

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Old World vultures are experiencing dramatic population declines and now are among the species most threatened with extinction. Understanding the environmental variables that can influence the reproductive indexes of vulture populations can facilitate both habitat and species management. The aim of this study was to identify which environmental variables primarily affect the breeding successes of the Griffon Vulture Gyps fulvus in northern Sardinia by applying a Bayesian hierarchical model. A unique dataset of reproductive records (197 nests monitored over 39 years for a total of 992 breeding records) was used. Eight environmental and topographical variables describing the habitat at the nesting sites were considered as potential predictors of breeding success. These included mean annual temperature, mean annual precipitation, isothermality, elevation, the normalized difference vegetation index, wind speed, and the aspect and slope of the land surface. In addition, we also considered the effect of human disturbance and the type of nest. According to our best model, the probability of successfully raising a chick in Griffon Vultures was higher in nests exposed to a high wind speed, not covered by natural shelters, where the vegetation was mostly represented by shrub and pastures, with low human disturbance and in years with low rainfall. This model will be useful for management of the breeding habitat and to identify the area most suitable for Griffon Vulture reproduction. This information is crucial for programming conservation measures aimed at enlarging the area of occupancy of the species.

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“…The mother and father take turns in nurturing the fledgling chicks and in foraging for food. Several studies noted that the male built more of the nest, nurtured the chicks more, and foraged more than did the female (Xirouchakis and Mylonas 2007;Xirouchakis 2007;Freund, Bahat, and Motro 2017;Yaniv-Feller et al 2018). The parents' incubation, hatching, and fledgling care can last six to seven months.…”

Section: Griffon Behavior and Traitsmentioning

confidence: 99%

The Biblical Nesher as the Griffon Vulture, Gyps fulvus: Ornithological character traits

Cannon

2024

Journal for the Study of the Old Testament

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The biblical Nesher נֶשֶׁר is the Griffon Vulture ( Gyps fulvus). Both the biblical Nesher and ornithological Griffon are known for their ‘bald’ head, enormous wingspan, effortless flight, cliff nesting, devoted nurturing, rapid descent, and group feasting on carrion. From biblical times until the industrial age, Griffons have been ubiquitous in the Middle East but absent in northern Europe or the Americas. However, eagles commonly resided in northern Europe but are uncommon residents or pass-through migrants in the Middle East. Through millennia, when northern Europeans sought translations for biblical plant and animal names, they sometimes replaced Middle Eastern meanings with recognizable northern European ones. So the Nesher became known as the eagle to many northern Europeans and North Americans. However, recent Hebrew-speaking ornithologists concur that the Nesher is the Griffon. This distinction becomes important when gleaning nuances from biblical metaphors, clarifying kosher dietary regulations, and discerning genealogical connections among raptors.

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Male-biased investment during chick rearing in the Griffon Vulture Gyps fulvus

Cited by 10 publications

References 15 publications

Survival of a small reintroduced griffon vulture population in the Apennines: Insights from Global Positioning System tracking

Survival of a small reintroduced griffon vulture population in the Apennines: Insights from Global Positioning System tracking

Modelling the effect of environmental variables on the reproductive success of Griffon Vulture (Gyps fulvus) in Sardinia, Italy

The Biblical Nesher as the Griffon Vulture, Gyps fulvus: Ornithological character traits

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