Pacific Decadal and El Niño oscillations shape survival of a seabird

Guillemain, Matthieu; Lebreton, Jean‐Dominique; Drummond, Hugh; Anderson, David J.

doi:10.1002/ecy.2179

Cited by 28 publications

(46 citation statements)

References 77 publications

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“…Anomalously high sea surface temperatures (SST) and deep thermoclines in the east and central equatorial Pacific signal an ENSO warm phase (“El Niño”). El Niño events alter the temporal and spatial patterns of primary productivity in the tropical Pacific (Feldman, Clark, & Halpern, ; McPhaden et al., ; Schaeffer et al., ) and can depress reproduction and/or survival for organisms at high trophic levels, including Nazca boobies (Champagnon, Lebreton, Drummond, & Anderson, ; Tompkins et al., ; Townsend & Anderson, 2007a). Opposite El Niño, ENSO “La Niña” events are characterized by cooling surface waters and a shallower thermocline in the eastern equatorial Pacific.…”

Section: Methodsmentioning

confidence: 99%

Sex‐specific patterns of senescence in Nazca boobies linked to mating system

Tompkins

Anderson

2019

Journal of Animal Ecology

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Under life‐history theories of ageing, increased senescence should follow relatively high reproductive effort. This expectation has rarely been tested against senescence varying between and within the two sexes, although such an approach may clarify the origins of sex‐specific ageing in the context of a given mating system. Nazca boobies (Sula granti; a seabird) practise serial monogamy and biparental care. A male‐biased population sex ratio results in earlier and more frequent breeding by females. Based on sex‐specific reproductive schedules, females were expected to show faster age‐related decline for survival and reproduction. Within each sex, high reproductive effort in early life was expected to reduce late‐life performance and accelerate senescence. Longitudinal data were used to (a) evaluate the sex specificity of reproductive and actuarial senescence and then (b) test for early‐/late‐life fitness trade‐offs within each sex. Within‐sex analyses inform an interpretation of sex differences in senescence based on costs of reproduction. Analyses incorporated individual heterogeneity in breeding performance and cohort‐level differences in early‐adult environments. Females showed marginally more intense actuarial senescence and stronger age‐related declines for fledging success. The opposite pattern (earlier and faster male senescence) was found for breeding probability. Individual reproductive effort in early life positively predicted late‐life reproductive performance in both sexes and thus did not support a causal link between early‐reproduction/late‐life fitness trade‐offs and sex differences in ageing. A high‐quality diet in early adulthood reduced late‐life survival (females) and accelerated senescence for fledging success (males). This study documents clear variation in ageing patterns—by sex, early‐adult environment and early‐adult reproductive effort—with implications for the role mating systems and early‐life environments play in determining ageing patterns. Absent evidence for a disposable soma mechanism, patterns of sex differences in senescence may result from age‐ and condition‐dependent mate choice interacting with this population's male‐biased sex ratio and mate rotation.

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Section: Methodsmentioning

confidence: 99%

Sex‐specific patterns of senescence in Nazca boobies linked to mating system

Tompkins

Anderson

2019

Journal of Animal Ecology

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“…In this study we showed at least partial evidence for negligible effects of banding operations on colonial tree-nesting waterbirds. Banding of birds for the purposes of population monitoring and individual identification is an ubiquitous ornithological practice that has proven extremely helpful to assess demographic parameters of countless wild bird populations (Santoro, Green & Figuerola, 2016; Champagnon et al, 2018). However, before committing resources and substantial efforts to start using them, it is important to not only assess issues like whether the fitted devices lead to reliable demographic parameters, but also that the banding operations themselves do not compromise survival and reproduction in any meaningful way (Saraux et al, 2011; Spotswood et al, 2012; Griesser et al, 2012; Guillemain et al., 2015a; Guillemain et al, 2015b; Weiser et al, 2016; Stein et al, 2017; Avila-Villegas, 2018; Border et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

Effects of research disturbance on nest survival in a mixed colony of waterbirds

Guillemain

Carré

Gili

2019

PeerJ

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Background Long-term research is crucial for the conservation and development of knowledge in ecology; however, it is essential to quantify and minimize any negative effects associated with research to gather reliable and representative long-term monitoring data. In colonial bird species, chicks are often marked with coded bands in order to assess demographic parameters of the population. Banding chicks in multi-species colonies is challenging because it involves disturbances to species that are at different stages of progress in their reproduction. Methods We took advantage of a long term banding program launched on Glossy Ibis (Plegadis falcinellus) breeding in a major mixed colony of herons in Camargue, southern France, to assess the effect of banding operation disturbance on the reproductive success of the three most numerous waterbirds species in the colony. Over two breeding seasons (2015 and 2016), 336 nests of Glossy Ibis, Little Egrets (Egretta garzetta) and Cattle Egrets (Bubulcus ibis) were monitored from a floating blind in two zones of the colony: one zone disturbed twice a year by the banding activities and another not disturbed (control zone). We applied a logistic-exposure analysis method to estimate the daily survival rate (DSR) of nests and chicks aged up to three weeks. Results Daily survival rate of Glossy Ibis was reduced in the disturbed zone while DSR increased for Little and Cattle Egrets in the disturbed zone. Nevertheless, DSR was not reduced on the week following the banding, thus discarding a direct effect of handling on breeding success of Glossy Ibis. The protocol and statistical analysis presented here are robust and can be applied to any bird species to test for the effect of a research disturbance or other short and repeated temporal events that may affect reproductive success over one or more breeding seasons.

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“…Manuscript to be reviewed extremely helpful to assess demographic parameters of countless wild bird populations (Santoro, Green & Figuerola, 2016;Champagnon et al, 2018). However, before committing resources and substantial efforts to start using them it is important to not only assess issues like whether the fitted devices lead to reliable demographic parameters, but also that the banding operations themselves do not compromise survival and reproduction in any meaningful way (Saraux et al, 2011;Spotswood et al, 2012;Griesser et al, 2012;Guillemain et al, 2015b,a;Weiser et al, 2016;Stein et al, 2017;Avila-Villegas, 2018;Border et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

Peer Review #1 of "Effects of research disturbance on nest survival in a mixed colony of waterbirds (v0.1)"

2019

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Background. Long-term research is crucial for the conservation and development of knowledge in ecology; however, it is essential to quantify and minimize any negative effects associated with research to gather reliable and representative long-term monitoring data. In colonial bird species, chicks are often marked with coded bands in order to assess demographic parameters of the population. Banding chicks in multi-species colonies is challenging because it involves disturbances to species that are at different stages of progress in their reproduction. Methods. We took advantage of a long term banding program launched on Glossy Ibis (Plegadis falcinellus) breeding in a major mixed colony of herons in Camargue, southern France, to assess the effect of banding operation disturbance on the reproductive success of the three most numerous waterbirds species in the colony. Over two breeding seasons (2015 and 2016), 336 nests of Glossy Ibis, Little Egrets (Egretta garzetta) and Cattle Egrets (Bubulcus ibis) were monitored from a floating blind in two zones of the colony: one zone disturbed twice a year by the banding activities and another not disturbed (control zone). We applied a logistic-exposure analysis method to estimate the daily survival rate (DSR) of nests and chicks aged up to three weeks. Results. Daily survival rate of Glossy Ibis was reduced in the disturbed zone while DSR increased for Little and Cattle Egrets in the disturbed zone. Nevertheless, DSR was not reduced on the week following the banding, thus discarding a direct effect of handling on breeding success of Glossy Ibis. The protocol and statistical analysis presented here are robust and can be applied to any bird species to test for the effect of a research disturbance or other short and repeated temporal events that may affect reproductive success over one or more breeding seasons.

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Pacific Decadal and El Niño oscillations shape survival of a seabird

Cited by 28 publications

References 77 publications

Sex‐specific patterns of senescence in Nazca boobies linked to mating system

Sex‐specific patterns of senescence in Nazca boobies linked to mating system

Effects of research disturbance on nest survival in a mixed colony of waterbirds

Peer Review #1 of "Effects of research disturbance on nest survival in a mixed colony of waterbirds (v0.1)"

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