No renesting observed after experimental clutch removal in Red Phalaropes breeding near Utqiaģvik, Alaska

Cosgrove, Jillian; Dugger, Bruce D.; Lanctot, Richard B.

doi:10.18194/ws.00213

Cited by 4 publications

(6 citation statements)

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“…This pattern could be due to a male-biased sex ratio early in the season, with more intense male–male competition for females ( Tracy and Schamel 1988 ). Cosgrove et al (2020) reported a male-biased operational sex ratio early in the 2018 breeding season on a study site close to ours, which could reflect a male-biased adult sex ratio in the population and, therefore, generally high male availability ( Schacht et al 2022 ; Kappeler et al 2023 ). With the progression of the season, each female that completes a (first) clutch will immediately rejoin the mating pool, whereas their male partner starts incubation and is therefore excluded from the mating pool.…”

Section: Discussionsupporting

confidence: 73%

“…The second aim of our study was to investigate seasonal changes in mate-guarding intensity and to test whether polyandrous females or early-breeding females associated less with their mate during egg laying. If mate guarding is female driven and related to the risk of losing the care-giving male, we expect that mate guarding will be less intense early in the season (when most males are available) and become stronger as males start incubating, that is, as the operational sex ratio becomes more female biased ( Tracy and Schamel 1988 ; Cosgrove et al 2020 ). During the short Arctic breeding season, only early-breeding females have a chance to become polyandrous ( Krietsch et al 2022 ).…”

Section: Introductionmentioning

confidence: 99%

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Mutual mate guarding with limited sexual conflict in a sex-role-reversed shorebird

Krietsch,

Valcu,

Cragnolini

et al. 2023

Behavioral Ecology

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Mate guarding is typically considered a male strategy to protect paternity. However, under some circumstances, females might also benefit from guarding their mate. Female mate guarding might be particularly important in socially polyandrous species in which females compete for access to care-giving males. Because males also benefit from being near their partner to avoid paternity loss, pair members may have a mutual interest in mate guarding in polyandrous species. We studied the time spent together and movements that lead to separation, as behavioral measures of mate guarding, in the classically polyandrous red phalarope (Phalaropus fulicarius). We equipped 64 breeding pairs with miniaturized telemetry loggers with GPS to assess variation in mate-guarding intensity in relation to breeding phenology and season, nest attendance, and the occurrence of extrapair paternity. We show that red phalarope pairs were almost continuously together in the days before clutch initiation with no sex bias in separation movements, indicating mutual contribution to mate guarding. Our results suggest that in red phalaropes, both pair members guard their mate, with limited sexual conflict arising through biases in the operational sex ratio and a trade-off with male nest attendance. We found no clear relationship between mate-guarding intensity and the occurrence of extrapair paternity. In this non-territorial socially polyandrous species, mutual mate guarding might be the process underlying the evolution of a brief but strong social pair bond, with no other purpose than producing a clutch for a care-giving male.

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Section: Discussionsupporting

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Mutual mate guarding with limited sexual conflict in a sex-role-reversed shorebird

Krietsch,

Valcu,

Cragnolini

et al. 2023

Behavioral Ecology

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“…Lastly, climate change may benefit shorebirds by lengthening the nesting season. This would allow adults to lay nests over a longer period of time 68 , as well as replace more nests that fail 32 (but see Cosgrove et al 76 ). However, given the strong relationship between chick survival and invertebrate availability, a longer breeding season is likely to be more detrimental than beneficial due to the increased phenological mismatch with their invertebrate prey (as discussed above).…”

Section: Discussionmentioning

confidence: 99%

Warming Arctic summers unlikely to increase productivity of shorebirds through renesting

Saalfeld

Hill

Hunter

et al. 2021

Sci Rep

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Climate change in the Arctic is leading to earlier summers, creating a phenological mismatch between the hatching of insectivorous birds and the availability of their invertebrate prey. While phenological mismatch would presumably lower the survival of chicks, climate change is also leading to longer, warmer summers that may increase the annual productivity of birds by allowing adults to lay nests over a longer period of time, replace more nests that fail, and provide physiological relief to chicks (i.e., warmer temperatures that reduce thermoregulatory costs). However, there is little information on how these competing ecological processes will ultimately impact the demography of bird populations. In 2008 and 2009, we investigated the survival of chicks from initial and experimentally-induced replacement nests of arcticola Dunlin (Calidris alpina) breeding near Utqiaġvik, Alaska. We monitored survival of 66 broods from 41 initial and 25 replacement nests. Based on the average hatch date of each group, chick survival (up to age 15 days) from replacement nests (Ŝi = 0.10; 95% CI = 0.02–0.22) was substantially lower than initial nests (Ŝi = 0.67; 95% CI = 0.48–0.81). Daily survival rates were greater for older chicks, chicks from earlier-laid clutches, and during periods of greater invertebrate availability. As temperature was less important to daily survival rates of shorebird chicks than invertebrate availability, our results indicate that any physiological relief experienced by chicks will likely be overshadowed by the need for adequate food. Furthermore, the processes creating a phenological mismatch between hatching of shorebird young and invertebrate emergence ensures that warmer, longer breeding seasons will not translate into abundant food throughout the longer summers. Thus, despite having a greater opportunity to nest later (and potentially replace nests), young from these late-hatching broods will likely not have sufficient food to survive. Collectively, these results indicate that warmer, longer summers in the Arctic are unlikely to increase annual recruitment rates, and thus unable to compensate for low adult survival, which is typically limited by factors away from the Arctic-breeding grounds.

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“…Supplemental information obtained from such tracking includes information on distances and time between nest attempts, and how these values compare to past studies. For example, we can determine how the rate of renesting after natural predation compares to that occurring after nest manipulation , Cosgrove et al 2020.…”

Section: Determining Nest Location Propensity and Timingmentioning

confidence: 99%

“…Numerous studies have equipped shorebirds with radio or GPS transmitters to detect movements on the breeding grounds, but data have generally been collected coarsely (i.e., 1-2 d intervals, presence/absence) or with poor accuracy (ca. 25-100 m), and require disturbing the bird to ensure detection , Cosgrove et al 2020, van der Kolk et al 2022). We are missing information such as how breeding birds settle on the landscape after arrival, the proportion of birds that nest, where birds travel on their incubation breaks, movements during the post-breeding period, and how birds move relative to their mate and ecological conditions.…”

Section: Introductionmentioning

confidence: 99%

High-frequency GPS transmitters allow understanding of breeding shorebird movements and nest survival without human disturbance

Hoepfner

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No renesting observed after experimental clutch removal in Red Phalaropes breeding near Utqiaģvik, Alaska

Cited by 4 publications

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Mutual mate guarding with limited sexual conflict in a sex-role-reversed shorebird

Mutual mate guarding with limited sexual conflict in a sex-role-reversed shorebird

Warming Arctic summers unlikely to increase productivity of shorebirds through renesting

High-frequency GPS transmitters allow understanding of breeding shorebird movements and nest survival without human disturbance

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