Do environmental conditions experienced in early life affect recruitment age and performance at first breeding in common goldeneye females?

Pöysä, Hannu; Clark, Robert G.; Paasivaara, Antti; Runko, Pentti

doi:10.1111/jav.01424

Cited by 4 publications

(3 citation statements)

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“…It has been found that the relative timing of first reproduction is affected by winter severity, recruits (first-time breeders) breeding later relative to the population mean after cold winters (Pöysä et al 2017). One possible explanation for this is that their weaker physiological condition prevented earlier nest initiation after harsh winters.…”

Section: Discussionmentioning

confidence: 99%

“…Here, I tested the above population‐level predictions, while simultaneously taking into account possible impacts of other potentially important factors on the rate of parasitic laying, including conditions during the previous winter (harsh weather in the wintering area may affect female condition, breeding propensity, and breeding performance; Fredga and Dow 1983, Lehikoinen et al 2006, Pöysä et al 2017), population density (population or nest density may affect opportunities for parasitic laying; Rohwer and Freeman 1989, Lyon 2003) and nest predation rate in the same year (parasitic laying may be a response to nest loss in the laying stage in the same season; Yom‐Tov 1980, Eadie et al 1988, Lyon and Eadie 2008). In addition, using annual data of the numbers of nesting attempts and potential nesting females, I assessed the occurrence of non‐nesting females and the pure parasite tactic in the population.…”

Section: Introductionmentioning

confidence: 99%

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Nest predation and climate change as drivers of alternative reproductive tactics in a migratory species

Pöysä

2024

Journal of Avian Biology

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Alternative reproductive tactics enable individuals to choose a reproductive tactic relative to their status and prevailing environmental conditions in a way that increases their fitness. For example, females in many avian species show phenotypic plasticity and employ alternative reproductive tactics to cope with changes in predation risk and climate. Conspecific brood parasitism (CBP), in which females lay eggs in nests of conspecifics, is one example of such behaviour. It has been proposed that when prospects for successful nesting are low and/or costs of reproduction are high, females employ tactics of low effort such as non‐breeding and parasitic laying. When environmental conditions are ideal and prospects for success high, females can increase their reproductive effort above typical nesting by laying parasitic eggs prior to initiating their own nest. Here, I used this flexible life‐history strategy concept and long‐term (1994‒2022) population level data of the common goldeneye Bucephala clangula to study how the rate of parasitic laying varies in relation to variation in nest predation risk and in the timing and length of the breeding season, the latter being measured by the timing of ice breakup. Nest predation rate in the previous year and timing of ice breakup interactively affected parasitic laying, the rate of parasitic laying being particularly high in years with late ice breakup and high nest predation rate in the previous year. Furthermore, the proportion of predated eggs was lower in parasitized nests than in non‐parasitized nests, while the opposite was true for the proportion of eggs that failed in other way. As a consequence, the final number of young produced per nest was higher for parasitized nests. The findings of this study show that changes in environmental conditions affect the dynamics of alternative reproductive tactics in goldeneyes, with consequences to population level reproductive output.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nest predation and climate change as drivers of alternative reproductive tactics in a migratory species

Pöysä

2024

Journal of Avian Biology

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“…For instance, other researchers reported locally measured conditions were more informative of survival than large-scale climate indices (Szostek and Becker 2015). Alternatively, it may be that lesser scaup are robust to variation in winter weather, as seems to be the case in the limited studies of over-winter survival in some duck species (Bergan and Smith 1993, Dugger et al 1994, Pöysä et al 2017.…”

Section: Discussionmentioning

confidence: 99%

Prefledging Growth and Recruitment of Female Lesser Scaup

et al. 2021

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Annual variation in juvenile recruitment is an important component of duck population dynamics, yet little is known about the factors affecting the probability of surviving and breeding in the first year of life. Two hypothesized mechanisms to explain annual variability are indirect carry-over effects (COEs) from conditions experienced during the prefledging period and direct effects from climatic conditions during the postfledging period. We used Cormack-Jolly-Seber models to estimate apparent survival and detection rates of 643 juvenile female lesser scaup (Aythya affinis) marked just prior to fledging at Red Rock Lakes National Wildlife Refuge in southwestern Montana, USA, 2010-2018. We evaluated COEs from hatch date, a hatch date × spring phenology interaction, and conspecific duckling density in addition to a direct climatic effect of winter conditions (indexed by the El Niño Southern Oscillation [ENSO]) and spring habitat conditions on the study area. We used growth data from a subset (n = 190) of known-aged ducklings to estimate the influence of hatch date and conspecific density on prefledging growth to help identify mechanisms underlying COEs. Prefledging growth and juvenile apparent survival were negatively related to measures of conspecific duckling density. We found evidence that detection probability varied annually for juvenile (but not adult) scaup, possibly representing decisions to delay breeding and not return to or remain at the study site in their first year of life. Like with apparent survival, there was suggestive evidence that detection probability decreased with increasing duckling density in the previous year. Hatching date was weakly negatively related to detection probability, but unrelated to apparent survival, whereas neither vital rate was related to winter ENSO index. Our results are consistent with a process where density-dependent growth rates in the prefledging period carry over to influence fitness in subsequent life-cycle stages. If this pattern generalizes to other systems, this density COE may have important implications for our understanding of duck population dynamics and reaffirms the importance of maintaining abundant brood-rearing habitats in conservation and management of ducks.

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Pilot study on neonicotinoids in Finnish waterbirds: no detectable concentrations in common goldeneye (Bucephala clangula) plasma

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Gómez-Ramírez,

Jaspers

et al. 2024

Environ Sci Pollut Res

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Neonicotinoids have been detected in farmland-associated birds and exposure to these insecticides has been linked to adverse effects. Even though neonicotinoids are mobile and persistent and have been detected in surface waters and aquatic invertebrates, there is a considerable lack of knowledge on their occurrence in waterbirds. Here we investigated the occurrence of seven neonicotinoids and some of their transformation products (imidacloprid, thiacloprid, thiamethoxam, acetamiprid, clothianidin, dinotefuran, nitenpyram, 6-chloronicotinic acid, hydroxy-imidacloprid, imidacloprid-urea, imidacloprid-olefin, thiamethoxam-urea, thiacloprid-amide, acetamiprid-acetate, and acetamiprid-desmethyl) in blood plasma of 51 incubating female common goldeneyes (Bucephala clangula). We collected samples from five different regions from southern to northern Finland encompassing rural and urban settings in coastal and inland areas. Surprisingly, none of the targeted neonicotinoids was found above the limit of detection in any of the samples. As neonicotinoid concentrations in wild birds can be very low, a likely reason for the nil results is that the LODs were too high; this and other possible reasons for the lack of detection of neonicotinoids in the goldeneyes are discussed. Our results suggest that neonicotinoid exposure in their breeding areas is currently not of major concern to female goldeneyes in Finland. Even though this study did not find any immediate danger of neonicotinoids to goldeneyes, further studies including surface water, aquatic invertebrates, and other bird species could elucidate potential indirect food chain effects.

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Do environmental conditions experienced in early life affect recruitment age and performance at first breeding in common goldeneye females?

Cited by 4 publications

References 50 publications

Nest predation and climate change as drivers of alternative reproductive tactics in a migratory species

Nest predation and climate change as drivers of alternative reproductive tactics in a migratory species

Prefledging Growth and Recruitment of Female Lesser Scaup

Pilot study on neonicotinoids in Finnish waterbirds: no detectable concentrations in common goldeneye (Bucephala clangula) plasma

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