The breeding biology of the Dalmatian Pelican <i>Pelecanus crispus</i>

Crivellì, Alain J.; Hatzilacou, Dionyssia; Catsadorakis, G.

doi:10.1111/j.1474-919x.1998.tb04609.x

Cited by 26 publications

(25 citation statements)

References 22 publications

(20 reference statements)

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“…At 25 days after hatching, 95.7% of Dalmatian pelican adults were present on the nest, whereas only 10% of American white pelican adults were present (Evans 1984a). Their elaborated nest building habit and/or their large size, conferring them a great advantage when prospecting for food (Crivelli et al 1998), could be involved in this phenomenon.…”

Section: Discussionmentioning

confidence: 98%

“…During the incubation and brooding stages we continuously recorded number of eggs, hatching dates, presence of adults in the nest, and number of shift changes of parental attendance in each nest. The laying date was estimated from the observed hatching date given an incubation period of 31 days (Crivelli et al 1998). During the brooding period (from hatching until chicks entered the crèche), each nest was observed on average 11.5 days (range 10 days to 14 days as chicks from different nests joined the crèche at different ages), corresponding to 122.35 h of observation (range 102 h to 142 h).…”

Section: Observation Of the Colonymentioning

confidence: 99%

“…Second, the Dalmatian pelican is the largest and heaviest species in overall size and mass (7-10 kg) among the Pelicanidae. Third, in contrast to other species of pelicans, the Dalmatian pelican is able to rear more than one chick and demonstrates low rates of nestling mortality (Johnsgard 1993;Crivelli et al 1998). The capacity to rear two chicks can be explained, in part, by this species' ability to feed chicks more than once a day (Crivelli et al 1998), unlike the European white pelican (Hatzilacou 1996) or the American white pelican (Evans 1984a).…”

Section: Introductionmentioning

confidence: 98%

“…First, unlike white pelicans (American and European Pelecanus onocrotalus), whose nest is typically a single depression on the ground, Dalmatian pelicans build elaborate reed nests on the ground (Crivelli et al 1998). Second, the Dalmatian pelican is the largest and heaviest species in overall size and mass (7-10 kg) among the Pelicanidae.…”

Section: Introductionmentioning

confidence: 98%

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Feeding frequency influences crèching age in the Dalmatian pelican, Pelecanus crispus

2008

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Crèching behaviour is common in colonial seabirds; nevertheless, the factors inducing chicks to aggregate remain relatively poorly understood. It has been proposed that brood size, laying date and nest attendance are important factors in the formation of a crèche. Moreover, in most species of pelicans, chicks join crèches following the development of homoeothermy and coincident with the end of the brooding behaviour. We studied effects of feeding rate, nest attendance, brood size, laying date and homoeothermy on the age at which chicks entered the crèche at a colony of Dalmatian pelicans (Pelecanus crispus), in Srebarna, Bulgaria. Single chicks were fed more frequently than chicks from two-chick broods. Unlike American white pelicans (Pelecanus erythrorhynchos), Dalmatian pelicans maintained brooding behaviour a further 9 days after chicks had developed thermoregulation abilities. In contrast to nests with two chicks, nests with only one chick were never left unattended by the parents before the chick reached the crèching stage. Laying date, nest attendance and brood size did not affect the age that the chick entered the crèche. The age the chick entered the crèche was not correlated with the age of homoeothermy acquisition, but chicks significantly joined the crèche at younger ages when the mean number of feeds per chick per day during the rearing period in the nest was higher. This result suggests an implication of growth rate in the crèching age. Joining the crèche earlier can provide benefits that could have strong implications for the chicks' future reproductive lives.

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Section: Discussionmentioning

confidence: 98%

Section: Observation Of the Colonymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 98%

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Feeding frequency influences crèching age in the Dalmatian pelican, Pelecanus crispus

2008

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“…Surveys from aircraft (Romania) were carried out once during the breeding period. Visits to nesting islands were carried out at least twice in most cases to cover asynchronous nesting (Crivelli et al 1998). At Lake Mikri Prespa (Greece), in order to avoid researcher disturbance in a very large and dense colony, censuses of DPs were carried out through a combination of counts from a vantage point at a distance from the colony and an on-site visit after the fledging of all young to cover non-visible sites.…”

Section: Methodsmentioning

confidence: 99%

Current status of the Dalmatian pelican and the great white pelican populations of the Black Sea/Mediterranean flyway

Catsadorakis¹,

Onmuş²,

Bugariu³

et al. 2015

Endang. Species. Res.

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The Dalmatian pelican (DP) Pelecanus crispu s and the great white pelican (GWP) Pelecanus onocrotalus are listed as 'Vulnerable' and 'Least Concern', respectively, in the IUCN Red List. We present an updated estimation of the Black Sea / Mediterranean flyway population status of both species, based on data provided by experts working in all 7 countries of the region where pelicans breed and/or overwinter, who came together at the 1st Workshop on Pelican Research and Conservation in Prespa, Greece. The DP breeding population in the Black Sea and Mediterranean countries increased from 1730−2105 pairs in the years 2000−2010 to 2154−2437 pairs in 2011−2012. Approximately 40% of the Palaearctic breeding population of GWP occurred in Southeast Europe and Turkey. In 2011−2012 the GWP population in this region was estimated to be 4702−5175 pairs, and has remained more or less stable during the last decade. Although all the breeding sites for both species are in protected areas, disturbance at nesting places was considered to be the main threat. Direct persecution and electric power lines still cause occasional problems. In deltaic lagoons, erosion and inundation of nesting sites cause breeding failures in DPs, while in inland wetlands large water level fluctuations are a widespread problem. Decrease of fish stocks is a threat, especially in coastal areas. Many stop-over wetlands along GWP migration routes between Southeast Europe and Africa have been seriously degraded or have disappeared, resulting in serious implications for their populations. Conservation needs are listed, but further research is recommended for both species.

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Early development and differentiation of the Laysan albatross (Phoebastria immutabilis(Rothschild, 1893): Procellariiformes)

Rehorek

Smith

Beeching

2016

Journal of Morphology

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Bird incubation is subdivided into two phases: differentiation (embryonic phase) and growth (fetal phase). Most birds have a relatively short incubation period (20-30 days) with the phase transition occurring midway through the incubation period. The Laysan albatross (Phoebastris immutabilis) is a large pelagic bird with a long incubation period. The purpose of this study was to document the differentiation phase with the aim of ascertaining the impact of a lengthened incubation on embryonic development. Eighty-two previously collected albatross embryos were examined, measured, and staged. The albatross was found to develop more slowly than smaller birds, with a rate similar to other long-incubating birds. Legs and wings grow at similar rates but exhibit variation in growth among their anatomical components. While the albatross embryos shared some morphological stages with chickens, they were more similar to ducks and pelicans. Special features of the albatross not shared with the Gallianserae (chickens and ducks) included an alligator-like curved tail, narial tubes, and a cloacal bulge. Further examination of other larger pelagic birds with long incubation periods are needed to determine the uniqueness of the Laysan albatross embryonic development. Although much embryonic phase growth was documented in the postnatal period, little is known about the later, fetal phase in Laysan albatross. Future studies should involve examination of later (post day 32) fetuses. J. Morphol. 277:1231-1249, 2016. © 2016 Wiley Periodicals, Inc.

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The breeding biology of the Dalmatian Pelican Pelecanus crispus

Cited by 26 publications

References 22 publications

Feeding frequency influences crèching age in the Dalmatian pelican, Pelecanus crispus

Feeding frequency influences crèching age in the Dalmatian pelican, Pelecanus crispus

Current status of the Dalmatian pelican and the great white pelican populations of the Black Sea/Mediterranean flyway

Early development and differentiation of the Laysan albatross (Phoebastria immutabilis(Rothschild, 1893): Procellariiformes)

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