Habitat Selection and Hatching Success of Eurasian Oystercatchers in Relation to Nesting Yellow-Legged Gulls and Human Presence

Rusticali, R.; Scarton, Francesco; Valle, Roberto G.

doi:10.2307/1522112

Cited by 11 publications

(8 citation statements)

References 9 publications

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“…This contrasts with the data from other related, large gulls, especially the closely related yellow-legged gull Larus (cachinnans) michahellis. In the Mediterranean, this species is an important predator on the eggs and chicks of many seabirds, some of them endangered (Vidal et al 1998;Rusticali et al 1999;Hernandez-Matias and Ruiz 2003;Oro et al 2005). It is also a very strong rival and competes successfully with other, smaller seabirds for breeding sites (Oro et al 2009), which is in agreement with our results.…”

Section: Discussionsupporting

confidence: 91%

An invasive gull displaces native waterbirds to breeding habitats more exposed to native predators

et al. 2014

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The effect of invasive opportunistic predators may include population changes in both native prey and native predators as well as alteration of predator-prey interactions. We analyzed the activity of native magpie Pica pica and changes in population, nest sites and nesting success probability of native waterbirds (namely: grebes, ducks, rails and native gulls) in response to the population growth of the invasive Caspian gull Larus cachinnans. The study was carried out at a reservoir in southern Poland and at a similar control reservoir where the Caspian gull was absent. Both the invasive gulls and the native magpie are opportunistic predators of nests of native waterbirds. The population increase of the invasive gull led to a decline in the population of native black-headed gulls Larus ridibundus only. However, the invasive gull displaced all the native species from the breeding islets located in the central part of the reservoir to islets located close to the shoreline. The latter were frequently visited by magpies, which depredated on nests along the shores, leading to an up to threefold decrease in nesting success as compared with nests located in the central area of the invaded reservoir. Predation by Caspian gulls was rarely observed. Thus, the invasion of Caspian gull caused complex direct and indirect effects on the waterbird community that included competition for breeding sites, changes in the spatial distribution of nests and alteration of predation rate by native predators. Moreover, the effects of invasion may not be reflected by changes in population size of native species.

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Section: Discussionsupporting

confidence: 91%

An invasive gull displaces native waterbirds to breeding habitats more exposed to native predators

et al. 2014

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“…A decrease in nest survival as the season progresses is common in birds and has been documented in Schulte 2012). There are multiple factors, such as increased nesting activity of other species leading to more interspecific interactions and increased recreational activity by humans leading to more disturbance to nesting birds, that cause nest survival to decrease later in the season; Rusticali et al (1999) found that Eurasian Oystercatchers (H. ostralegus) nesting later in the season were affected more by Yellow-legged Gull (L. michahellis) nest depredation than early nesters. Tjørve and Underhill (2008) also found nest survival to be lower for later nesting African Black Oystercatchers (H. moquini).…”

Section: Discussionmentioning

confidence: 99%

Reproductive Success of the American Oystercatcher (Haematopus palliatus) in Texas

et al. 2014

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The American Oystercatcher (Haematopus palliatus) is listed as a Species of High Concern in the United States Shorebird Conservation Plan due to a small population size and threats during its annual cycle. Previous studies of the American Oystercatcher have focused on Atlantic Coast populations; however, little is known about the reproductive success of the western Gulf Coast population. The objective of this study was to determine nest and brood survival of American Oystercatchers in Texas. A total of 337 nests and 121 broods were monitored on the Texas Gulf Coast during 2011-2013. The top model for nest survival in Program MARK included a linear decline in survival across the nesting season and as nests aged. Survival also declined as island size and foraging habitat near the nest site increased. The probability of a nest surviving from mean initiation date to hatching was 0.384 (95% CI = 0.317, 0.451). The top model for brood survival included a linear decline in survival across the season and an increase in survival as broods aged. Brood survival also varied among years and coastal region. The probability of a brood surviving from mean hatch date to 35 days after hatch ranged from 0.397 (95% CI = 0.204, 0.578) in 2013 to 0.887 (95% CI = 0.673, 0.964) in 2011 across all regions. Known causes of nest and brood loss included beach overwash, depredation, and starvation. This study provides the first estimates of nest and brood survival of the American Oystercatcher along the western Gulf Coast. The additional insight into patterns of nest and brood survival in this species will be useful for future conservation planning efforts that target breeding American Oystercatchers. Known causes of nest and brood loss included beach overwash, depredation, and starvation. This study provides the first estimates of nest and brood survival of the American Oystercatcher along the western Gulf Coast. The additional insight into patterns of nest and brood survival in this species will be useful for future conservation planning efforts that target breeding American Oystercatchers. Keywords

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“…The predator was identified to species in only 12.1% of predation events. Birds identified to species were Common Gull Larus canus ( n = 70), Yellow‐legged Gull L. michahellis ( n = 38) and Carrion Crow ( n = 1), each species being identified in a single study (Robson 1998, Rusticali et al . 1999, Jackson 2001).…”

Section: Identity Of Wader Nest Predatorsmentioning

confidence: 99%

Predation on wader nests in Europe

MacDonald

Bolton

2008

Ibis

149

137

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The population declines of waders in Europe are widely considered to have resulted from habitat loss and degradation due to agricultural changes. However, recent empirical evidence suggests that levels of predation on wader nests are unsustainably high in many cases, even in some situations where breeding habitat is otherwise favourable. We review the published and 'grey' literature on nest predation on waders in Europe and quantify the relative importance of the major predators. Nest cameras offer the least biased method of identifying and quantifying nest predators. A small number of camera studies, in combination with others utilizing nest temperature loggers, indicate that nocturnal/mammalian predators make the largest contribution to wader nest predation. More than half of site-years or studies reviewed reported clutch failure rates of over 50% attributable to predation alone, a rate that is likely to be associated with declining populations, although parameters such as chick and adult survival will also affect population trends. Correlates of wader nest predation are documented, with time of season, field type and management, distance to habitat/field edge, wader nest density, and abundance of mammalian predators being most consistently identified. Future directions of research into wader productivity are discussed, and we suggest that studies quantify additional life-history parameters such as chick survival, as well as examining the predator community, wherever possible.

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Habitat Selection and Hatching Success of Eurasian Oystercatchers in Relation to Nesting Yellow-Legged Gulls and Human Presence

Cited by 11 publications

References 9 publications

An invasive gull displaces native waterbirds to breeding habitats more exposed to native predators

An invasive gull displaces native waterbirds to breeding habitats more exposed to native predators

Reproductive Success of the American Oystercatcher (Haematopus palliatus) in Texas

Predation on wader nests in Europe

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