Frequent Copulations Despite Low Sperm Competition in White Storks (Ciconia Ciconia)

Tortosa, Francisco S.; Redondo, Tomás

doi:10.1163/156853992x00408

Cited by 40 publications

(6 citation statements)

References 53 publications

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“…However, the sex differences in stork arrival were not very strong (p = 0.05), and the divide was not absolute (sometimes the female arrived first). We believe that the sensitive tracking data allowed us to identify them here and the use of less precise nest-monitoring methods may account for the ambiguity regarding stork protandry in previous studies Tortosa & Redondo, 1992;Vergara et al, 2007). Thus, assuming the first stork arriving at the nest is the male, as in Gordo et al (2013), would be correct in ca.…”

Section: Discussionmentioning

confidence: 99%

Early arrival at breeding grounds: Causes, costs and a trade‐off with overwintering latitude

Rotics

Kaatz²,

Turjeman

et al. 2018

Journal of Animal Ecology

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Early arrival at breeding grounds is of prime importance for migrating birds as it is known to enhance breeding success. Adults, males and higher quality individuals typically arrive earlier, and across years, early arrival has been linked to warmer spring temperatures. However, the mechanisms and potential costs of early arrival are not well understood. To deepen the understanding of arrival date differences between individuals and years, we studied them in light of the preceding spring migration behaviour and atmospheric conditions en route. GPS and body acceleration (ACC) data were obtained for 35 adult white storks (Ciconia ciconia) over five years (2012-2016). ACC records were translated to energy expenditure estimates (overall dynamic body acceleration; ODBA) and to behavioural modes, and GPS fixes were coupled with environmental parameters. At the interindividual level (within years), early arrival was attributed primarily to departing earlier for migration and from more northern wintering sites (closer to breeding grounds), rather than to migration speed. In fact, early-departing birds flew slower, experienced weaker thermal uplifts and expended more energy during flight, but still arrived earlier, emphasizing the cost and the significance of early departure. Individuals that wintered further south arrived later at the breeding grounds but did not produce fewer fledglings, presumably due to positive carry-over effects of advantageous wintering conditions (increased precipitation, vegetation productivity and daylight time). Therefore, early arrival increased breeding success only after controlling for wintering latitude. Males arrived slightly ahead of females. Between years, late arrival was linked to colder temperatures en route through two different mechanisms: stronger headwinds causing slower migration and lower thermal uplifts resulting in longer stopovers. This study showed that distinct migratory properties underlie arrival time variation within and between years. It highlighted (a) an overlooked cost of early arrival induced by unfavourable atmospheric conditions during migration, (b) an important fitness trade-off in storks between arrival date and wintering habitat quality and (c) mechanistic explanations for the negative temperature-arrival date correlation in soaring birds. Such understanding of arrival time can facilitate forecasting migrating species responses to climate changes.

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Section: Discussionmentioning

confidence: 99%

Early arrival at breeding grounds: Causes, costs and a trade‐off with overwintering latitude

Rotics

Kaatz²,

Turjeman

et al. 2018

Journal of Animal Ecology

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“…All chicks were marked with numbered PVC rings below 50 days of age. Further details on study areas and identification methods are given elsewhere (Tortosa & Redondo 1992a). Chick body mass was recorded every 5-7 days with Pesola spring balances from hatching until fledging.…”

Section: Methodsmentioning

confidence: 99%

Nest switching and alloparental care in colonial white storks

1995

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Abstract. White stork, Ciconia ciconia, chicks were observed to abandon their natal nests prior to independence and to be adopted by neighbouring foster parents in approximately 40% of broods at three breeding colonies. Nest switching coincided with a decrease in feeding rates by parents and an increase in aggression by siblings triggered by the flight exercises of nestmates, and mainly affected the eldest chicks in larger broods. Chicks that abandoned their natal nests moved into broods containing both fewer and younger chicks, and thus experienced a decrease in aggression rate compared with their natal broods. Adopted chicks may also have increased their food intake as a consequence of nest switching. Resident chicks suffered from lower feeding rates during adoption and had lower mass increments than chicks in non-fostering broods of comparable age and size. Both adults and chicks were highly aggressive against trespassing chicks. The probability of aggression was a good predictor of the extent of fostering across different brood sizes, suggesting that defence by residents was effective at preventing adoption. Residents appeared not to recognize kin but were capable of aggressive discrimination against non-familiar chicks. Fostering behaviour in this species can be understood as the equilibrial outcome of an intraspecific 'co-evolutionary' arms race between kleptoparasitic chicks and fostering host adults with weak selection pressures for both parties.

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“…Notably, both sequential nest use and nest usurpation has been observed in a range of different birds, often including interspecific interactions, and may result in mixed broods (e.g., Pulliainen and Saari, 1991;Samplonius and Both, 2013;Kubelka et al, 2014;Chedad et al, 2022). Theft of nest material may be another route of transmission falling into this category (Jones et al, 2007;Thompson et al, 2017), especially in cases where nest theft results in defense behavior (Tortosa and Redondo, 1992), but this would likely be limited to cases where feathers are stolen.…”

Section: Transfer Of Head Licementioning

confidence: 99%

Coevolutionary analysis of the Philopteroides Mey, 2004 (Phthiraptera: Ischnocera) parasitizing bulbuls (Passeriformes: Pycnonotidae)

Ren

Gustafsson²,

Tian³

et al. 2023

Front. Ecol. Evol.

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IntroductionAvian head lice comprise a diverse group of distantly related genera of lice that exhibit a strongly convergent morphology. Due to their lack of free-living stages, their strong morphological adaptations to living on the host’s head, and the limited opportunities for transfer between hosts during mating or nesting, the lateral transmission of head lice between non-conspecific hosts may be presumed to be restricted. Despite this, many species of head lice are ostensibly host generalists. We here examine lice of the head louse genus Philopteroides Mey, 2004, from bulbuls (Passeriformes: Pycnonotidae).MethodsWe use two different methods, ParaFit and Jane, to get insights on the co-evolutionary history of Philopteroides species and their bulbul hosts. Jane was run with a variation of event costs.ResultsOur phylogenetic analysis indicate that several morphologically cryptic species can be found in this group, most of which appear to be host specific. However, co-phylogenetic analyses indicate that host-switching has been common in the history of these lice, and co-speciation events have been rarer than expected. Moreover, lowest-cost co-evolutionary reconstructions under a variety of event costs are indistinguishable from random. An expanded dataset with more Philopterus-complex lice was found to be evenly balanced between host-switching and co-speciation events.DiscussionThe transfer of avian head lice between host species is poorly understood, but evidently fairly common. Several potential routes are discussed, but direct evidence is missing. Potentially, the presence of multiple bulbul species at fruiting trees may be an important factor in this transfer. However, such transfer routes also do not explain why Philopteroides lice on bulbuls appear to be distinct from those of other hosts. Moreover, as many of the species recovered in our analysis are morphologically indistinguishable, cryptic speciation appears to be common in this group.

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Frequent Copulations Despite Low Sperm Competition in White Storks (Ciconia Ciconia)

Cited by 40 publications

References 53 publications

Early arrival at breeding grounds: Causes, costs and a trade‐off with overwintering latitude

Early arrival at breeding grounds: Causes, costs and a trade‐off with overwintering latitude

Nest switching and alloparental care in colonial white storks

Coevolutionary analysis of the Philopteroides Mey, 2004 (Phthiraptera: Ischnocera) parasitizing bulbuls (Passeriformes: Pycnonotidae)

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