Uncertain Nest Fates in Songbird Studies and Variation in Mayfield Estimation

Manolis, James C.; Andersen, David E.; Cuthbert, Francesca J.

doi:10.2307/4089587

Cited by 80 publications

(108 citation statements)

References 6 publications

Supporting

Mentioning

107

Contrasting

Order By: Relevance

“…For failed nests, Program MARK (White and Burnham, 1999) incorporates probabilities of failure for each day between the last observed active date and first observed inactive date; thus, no final exposure day is estimated (Dinsmore et al, 2002). If nest fate was not known, the termination date was assigned as the last day the nest was known to be active (Manolis et al, 2000).…”

Section: Discussionmentioning

confidence: 99%

Breeding Ecology of Birds at Teshekpuk Lake: A Key Habitat Site on the Arctic Coastal Plain of Alaska

Liebezeit¹,

White²,

Zack³

2011

ARCTIC

View full text Add to dashboard Cite

ABSTRACT. The Teshekpuk Lake Special Area in the National Petroleum Reserve -Alaska (NPR-A) currently has no long-term protection from oil development. In this study, we provide novel information on nest density, productivity, and habitat use at Teshekpuk relative to a developed oilfield site at Prudhoe Bay, Alaska, to assess the importance of Teshekpuk for tundra-nesting birds and to provide recommendations regarding potential oil development. Mean annual nest density of all bird species combined was significantly higher at Teshekpuk than at Prudhoe Bay and was higher than any of five other sites with comparable data on the Alaskan Arctic Coastal Plain. Nest densities were significantly higher at Teshekpuk than at Prudhoe Bay for Lapland longspurs (Calcarius lapponicus) and long-billed dowitchers (Limnodromus scolopaceus), although those for semipalmated sandpipers (Calidris pusilla) were higher at Prudhoe Bay. Total shorebird nest densities at Teshekpuk were among the highest of any sites in the region. At Teshekpuk, shorebirds nested preferentially in wet and emergent habitats, including flooded low-center polygons, non-patterned tundra, and Carex aquatilis-dominated habitats. Therefore, we recommend that future oil infrastructure placement in this region avoid these habitats. Using data collected at Teshekpuk and Prudhoe Bay from 2005 to 2008, we modeled nest survivorship for 11 shorebird species and for Lapland longspurs. For longspurs, the best-supported models based on AIC c values indicated that nest survival was always higher at Teshekpuk, but it was also higher elsewhere in years of high lemming abundance and later in the nesting season. For shorebirds, the best-supported models indicated that nest survivorship was highly variable among years and sites. Uniparental-nesting shorebirds had lower nest survivorship shortly after nest initiation followed by a rapid increase, while biparental survivorship was consistently high throughout the nest lifetime. We recommend that disturbances to nesting habitat be minimized during early June, when vulnerability to nest failure is higher. Because of their high importance to Arctic breeding birds, we recommend that areas within the Teshekpuk Lake Special Area, including our study area and those that are currently under 10-year deferral, be considered for permanent protection.Key words: Arctic Coastal Plain, Teshekpuk Lake Special Area, National Petroleum Reserve-Alaska, nest diversity, nest density, nest survivorship, shorebirds, Lapland longspur RÉSUMÉ. La zone spéciale du lac Teshekpuk située dans la réserve nationale de pétrole de l'Alaska (NPR-A) n'est dotée d'aucune protection à long terme en matière de mise en valeur pétrolière. Dans la présente étude, nous fournissons de nouveaux renseignements sur la densité des nids, la productivité et l'utilisation de l'habitat à Teshekpuk à la lumière d'un chantier de mise en valeur pétrolière à la baie Prudhoe, en Alaska et ce, dans le but d'évaluer l'importance de Teshekpuk pour les oiseaux qui nichent dans la toundra a...

show abstract

Section: Discussionmentioning

confidence: 99%

Breeding Ecology of Birds at Teshekpuk Lake: A Key Habitat Site on the Arctic Coastal Plain of Alaska

Liebezeit¹,

White²,

Zack³

2011

ARCTIC

View full text Add to dashboard Cite

show abstract

“…We calculated daily survival rates using the Mayfield (1975) method and constructed corresponding standard error estimates following methods described by Johnson (1979). We calculated exposure days for the Mayfield estimates using methods recommended by Manolis et al (2000). We restricted our definition of camera-free nests to those that occurred on the same plots as camera-monitored nests.…”

Section: Statistical Analysesmentioning

confidence: 99%

Point Counts Underestimate the Importance of Arctic Foxes as Avian Nest Predators: Evidence from Remote Video Cameras in Arctic Alaskan Oil Fields

Liebezeit¹,

Zack²

2009

ARCTIC

View full text Add to dashboard Cite

ABSTRACT. We used video cameras to identify nest predators at active shorebird and passerine nests and conducted point count surveys separately to determine species richness and detection frequency of potential nest predators in the Prudhoe Bay region of Alaska. From the surveys, we identified 16 potential nest predators, with glaucous gulls (Larus hyperboreus) and parasitic jaegers (Stercorarius parasiticus) making up more than 80% of the observations. From the video evidence, however, we identified arctic foxes (Alopex lagopus) as the predators in five of six predation events recorded with the cameras. These results indicate that estimated abundances of predators alone may not accurately reflect their true or proportional importance as nest predators. We also found that the identified predators removed all eggs and left the nests intact. Thus, attempts to identify predators solely on the basis of nest remains are not reliable for smaller bird species in this region. We found no evidence that camera-monitored nests were at greater risk of predation or desertion than camera-free nests. Overall, our ability to film predation events was hampered by the brief, highly synchronized breeding season, the harsh climate, and the higher nest survivorship for shorebirds in this region relative to temperate-breeding passerines, which have been the focus of most studies that use camera systems in attempts to identify nest predators at active nests.Key words: Arctic Alaska, Kuparuk, oil fields, nest predators, nest predation, passerines, Prudhoe Bay, shorebirds, video camera RÉSUMÉ. Nous avons recouru à des cameras vidéo pour repérer les prédateurs de nids actifs d'oiseaux de rivage et de passériformes, puis nous avons effectué des calculs séparément afin de déterminer la richesse des espèces et la fréquence de détection de prédateurs de nids potentiels dans la région de la baie de Prudhoe, en Alaska. À partir des calculs, nous avons dénombré 16 prédateurs de nids potentiels, les goélands bourgmestres (Larus hyperboreus) et les labbes parasites (Stercorarius parasiticus) représentant plus de 80 % des observations. Cependant, à partir des vidéos, nous avons pu constater que les renards arctiques (Alopex lagopus) étaient les prédateurs dans cinq des six cas de prédation enregistrés au moyen des caméras. Ces résultats laissent croire que seules, les abondances estimées de prédateurs ne reflètent pas nécessairement leur importance véritable ou proportionnelle à titre de prédateurs de nids. Nous avons également constaté que les prédateurs en question prenaient tous les oeufs, sans toutefois toucher aux nids. Par conséquent, la possibilité d'identifier les prédateurs seulement en fonction des restes de nids n'est pas fiable dans le cas des plus petites espèces d'oiseaux de cette région. Rien ne nous a laissé croire que les nids surveillés à l'aide d'une caméra étaient plus vulnérables à la prédation ou à l'abandon que les nids n'étant pas dotés de caméras. Dans l'ensemble, la saison de reproduction hautement synchronisée -bien que ...

show abstract

“…DINSMORE et al 2002). We feel it is important to point out, however, that there is some debate over the use of this method (WEIDINGER 2007), in particular the ways in which data should be collected and analyzed (MANOLIS et al 2000). For example, when there are records with uncertain outcomes, excluding these data biases the survival estimate if they do not have the same survival rate as the rest of the observations.…”

Section: Discussionmentioning

confidence: 99%

Shelter building behavior of Pyrrhopyge papius (Lepidoptera: Hesperiidae) and the use of the Mayfield method for estimating survivorship of shelter-building Lepidopteran larvae

Greeney¹,

Walla²,

Jahner³

et al. 2010

Zoologia (Curitiba, Impr.)

View full text Add to dashboard Cite

Uncertain Nest Fates in Songbird Studies and Variation in Mayfield Estimation

Cited by 80 publications

References 6 publications

Breeding Ecology of Birds at Teshekpuk Lake: A Key Habitat Site on the Arctic Coastal Plain of Alaska

Breeding Ecology of Birds at Teshekpuk Lake: A Key Habitat Site on the Arctic Coastal Plain of Alaska

Point Counts Underestimate the Importance of Arctic Foxes as Avian Nest Predators: Evidence from Remote Video Cameras in Arctic Alaskan Oil Fields

Shelter building behavior of Pyrrhopyge papius (Lepidoptera: Hesperiidae) and the use of the Mayfield method for estimating survivorship of shelter-building Lepidopteran larvae

Contact Info

Product

Resources

About