Incubation Patterns in a Central-Place Forager Affect Lifetime Reproductive Success: Scaling of Patterns from a Foraging Bout to a Lifetime

Shoji, Akiko; Elliott, Kyle H.; Aris‐Brosou, Stéphane; Crump, Doug; Gaston, Anthony J.

doi:10.1371/journal.pone.0017760

Cited by 23 publications

(33 citation statements)

References 70 publications

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“…However, incubation may be a relatively demanding reproduction phase, especially in terms of time limitation and energy expenditure. This means that it can be costly to the incubating parents as it restricts their available time for other activities, including foraging and/or soliciting further mates, in addition to exposing the incubating parent to predators (Piersma and Morrison, 1994;Reid et al, 2002;Creswell et al, 2004;Houston et al, 2005;Shoji et al, 2011). The behaviour of incubating birds, particularly groundnesting birds, which breed in harsh environments, plays a vital role in preventing the exposure of incubated eggs to extreme temperatures which could result in egg death and failure of reproduction (Downs and Ward, 1997;Carey, 2002;Brown and Downs, 2003;Olson et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

Incubation Routine of Saunders's TernSternula Saundersiin a Harsh Environment

AlRashidi

Shobrak

2015

Avian Biology Research

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Saunders's Tern (Sternula saundersi) is a small ground-nesting seabird which breeds in the coasts and islands of Africa and Asia bordering the northern Indian Ocean. Despite having a wide distribution, little information is available on the breeding biology of this species. This study was carried out on Farasan Islands, Saudi Arabia, to document some aspects of the breeding biology of this species using a small trail camera. Such camera systems can reveal the incubation routine of this species in such a harsh environment. The midday ground temperature in March may reach up to 50 °C, while the midnight ground temperature may only reach 20 °C, thus leaving the eggs unattended even for few minutes, especially during the hottest and coldest parts of the day, may cause nest failure. This huge variation in ground temperatures between day and night gave us an excellent opportunity to test the behavioural mechanism used by the parents for maintaining the optimal egg temperature so as to protect their eggs. We found that nest attendance increases when the temperatures deviated from the optimal egg temperature, and nests were incubated for more than 90% of the time during the hottest and coldest parts of the day to prevent eggs from harmful temperatures.

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Section: Discussionmentioning

confidence: 99%

Incubation Routine of Saunders's TernSternula Saundersiin a Harsh Environment

AlRashidi

Shobrak

2015

Avian Biology Research

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“…As such, seabird partners establish specific foraging strategies in order to enhance their reproductive success through, for example, better coordination of provisioning behaviour (Davis 1988, Shoji et al 2011, Thiebot et al 2015. Despite the potentially long-lasting and important consequences of pair similarity on reproductive success, only 2 studies, to the best of our knowledge, have focused on identifying pair similarity in the diet and behaviour of seabirds.…”

Section: Introductionmentioning

confidence: 99%

Mate similarity in foraging Kerguelen shags: a combined bio-logging and stable isotope investigation

Camprasse¹,

Cherel²,

Arnould³

et al. 2017

Mar. Ecol. Prog. Ser.

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Similarity or dissimilarity between 2 individuals that have formed a pair to breed can occur in morphology, behaviour and diet. Such patterns influence partners' cooperation when rearing their offspring, consequently influencing reproductive success. They may confer different benefits, depending on species and contexts. However, the extent to which breeding partners are more similar in morphology, behaviour, and diet is poorly documented. Furthermore, the relationship between behavioural consistency and mate choice is particularly poorly understood. To investigate these issues, Kerguelen shags Phalacrocorax verrucosus, which are monogamous with high mate fidelity across years, were studied. Partners were equipped with GPS and diving behaviour loggers. Feather and blood samples were analysed for stable isotopes (δ 13 C, a proxy of foraging habitat, and δ 15 N, a proxy of diet/trophic position). Generalized linear mixed effects models and permutation tests were used to investigate pair similarity in morphology, foraging behaviour, behavioural consistency, overlap in foraging areas, and diets/foraging habitats. Mates were found not to exhibit size-assortative mating, but were more similar in foraging behaviour. They did not show assortative or disassortative mating based on foraging behavioural consistency. Furthermore, they followed more similar bearings and overlapped more in foraging areas. In accordance with this, partners were more similar in δ 15 N. Given the lack of assortative mating by morphology, the similarity in behaviour could be due to individuals selecting mates with similar foraging abilities, linked with individual quality, and/or subsequently using information gained from their partners' foraging strategies (e.g. local enhancement). This could help breeding pairs increase their foraging efficiency and reproductive success.

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“…For each individual we preserved a drop of blood on filter paper to determine sex using PCR [5]. All blood samples were obtained within two minutes of capture.…”

Section: Methodsmentioning

confidence: 99%

High Corticosterone, Not High Energy Cost, Correlates with Reproductive Success in the Burrow-Nesting Ancient Murrelet

et al. 2013

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Theory and observations suggest that offspring abandonment in animals may occur when the costs to future reproductive output of current reproductive effort outweigh the fitness benefits of rearing the current brood. While hormonal cues (i.e. corticosterone) or energy reserves are believed to be involved, few studies have directly focused on the proximate cues influencing behaviours directly related to reproductive success. To address this information gap, we determined the incubation metabolic rates and corticosterone (CORT) levels of naturally fasting and freely incubating ancient murrelets (Synthliboramphus antiquus). Respiratory quotient (RQ) increased with date, suggesting that incubating ancient murrelets shifted from strictly lipid-based metabolism towards more protein-based metabolism as incubation progressed. Birds that hatched only one nestling had higher levels of circulating CORT than those which hatched two, suggesting that birds which laid only a single egg found incubation more stressful than those which laid two. However, CORT levels and incubation shift lengths were not correlated, suggesting that birds that undertook prolonged incubation shifts did so only when their energy stores were not jeopardized.

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Incubation Patterns in a Central-Place Forager Affect Lifetime Reproductive Success: Scaling of Patterns from a Foraging Bout to a Lifetime

Cited by 23 publications

References 70 publications

Incubation Routine of Saunders's TernSternula Saundersiin a Harsh Environment

Incubation Routine of Saunders's TernSternula Saundersiin a Harsh Environment

Mate similarity in foraging Kerguelen shags: a combined bio-logging and stable isotope investigation

High Corticosterone, Not High Energy Cost, Correlates with Reproductive Success in the Burrow-Nesting Ancient Murrelet

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