Biogeography of the marine birds of a confined sea, the Mediterranean

Zotier, Richard; Bretagnolle, Vincent; Thibault, Jean‐Claude

doi:10.1046/j.1365-2699.1999.00260.x

Cited by 57 publications

(64 citation statements)

References 27 publications

(26 reference statements)

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“…Although it is known that Scopoli's shearwaters feed often very close to the sea surface (Zotier et al 1999), to our knowledge, such a high proportion of shallow and short duration dives (82.3% of total) has never been recorded in a seabird species before. Since seabirds feed mostly on the sea surface when exploiting fishery discards (Grémillet et al 2008), the high number of shallow dives recorded in Scopoli's shearwater might reflect extensive use of fisheries discards by the birds in this study.…”

Section: Identification Of Divesmentioning

confidence: 75%

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A new algorithm for the identification of dives reveals the foraging ecology of a shallow-diving seabird using accelerometer data

et al. 2017

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Island (35°51′33″N; 12°51′34″E) from 12 June to 8 September 2015 by deploying accelerometer data loggers on 60 Scopoli's shearwaters. Four birds were also equipped with TDRs. TDRs recorded only 17.7% of the dives detected by the accelerometers using the algorithm. A total of 82.3% of dives identified by algorithm were too short or shallow to be detected by TDRs. Therefore, TDRs were not accurate enough to detect most of the dives in Scopoli's shearwaters, which foraged mostly close to the sea surface. Our data showed that birds performed shorter foraging trips and dived more frequently in the early chick-rearing period compared with the late chick-rearing and incubation phases. Furthermore, parents dived more frequently during short foraging trips. Our results suggest that Scopoli's shearwaters maximised their foraging effort (e.g. number of dives, short trips) during shorter foraging trips and during early chick-rearing.

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Section: Identification Of Divesmentioning

confidence: 75%

“…Fledglings leave their nests from mid to end of October. Scopoli's shearwaters exploit a wide range of prey (Grémillet et al 2014) and forage close to the sea surface (Zotier et al 1999). During incubation, parents perform mainly long trips lasting several days (Cecere et al 2013).…”

mentioning

confidence: 99%

A new algorithm for the identification of dives reveals the foraging ecology of a shallow-diving seabird using accelerometer data

et al. 2017

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“…A characteristic of special relevance to applying stable isotope analysis in the Mediterranean is the high regional heterogeneity of water temperature, salinity, and primary productivity (Zotier et al, 1999), which could result in different isotopic compositions of food webs from different locations, a factor that should be taken into account in any study involving spatial comparisons (Schell et al, 1999).…”

Section: Applications In the Study Of The Mediterranean Seabird Commumentioning

confidence: 99%

“…Both the population sizes and diversity of seabirds are relatively low in the Mediterranean and breeding colonies usually have low numbers of species and individuals (Zotier et al, 1999). However, species composition of colonies, colony size and distribution, are highly variable geographically.…”

Section: Applications In the Study Of The Mediterranean Seabird Commumentioning

confidence: 99%

“…This area holds several species of special conservation concern, with breeding distributions in some cases restricted to the Mediterranean (Zotier et al, 1999). Humans and their activities have been present in the Mediterranean and its islands for a long time and have impacted the distribution and number of seabirds.…”

Section: Applications In the Study Of The Mediterranean Seabird Commumentioning

confidence: 99%

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Using stable isotopes of nitrogen and carbon to study seabird ecology: applications in the Mediterranean seabird community

Forero¹,

Hobson²

2003

Sci. Mar.

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SUMMARY: The application of the stable isotope technique to ecological studies is becoming increasingly widespread. In the case of seabirds, stable isotopes of nitrogen and carbon have been mainly used as dietary tracers. This approach relies on the fact that foodweb isotopic signatures are reflected in the tissues of the consumer. In addition to the study of trophic ecology, stable isotopes have been used to track the movement of seabirds across isotopic gradients, as individuals moving between isotopically distinct foodwebs can carry with them information on the location of previous feeding areas. Studies applying the stable isotope methodology to the study of seabird ecology show a clear evolution from broad and descriptive approaches to detailed and individual-based analyses. The purpose of this article is to show the different fields of application of stable isotopes to the study of the seabird ecology. Finally, we illustrate the utility of this technique by considering the particularities of the Mediterranean seabird community, suggesting different ecological questions and conservation problems that could be addressed by using the stable isotope approach in this community.Key words: stable isotopes, Mediterranean Sea, seabirds, trophic ecology, conservation, nitrogen, carbon. RESUMEN: EL EMPLEO DE ISÓTOPOS ESTABLES DE NITRÓGENO Y CARBONO PARA ESTUDIAR LA ECOLOGÍA DE LAS AVES MARI-NAS: APLICACIONES A LA COMUNIDAD DE AVES MARINAS DEL MEDITERRÁNEO. -La aplicación de la medición de isótopos estables a los estudios ecológicos es cada vez más frecuente. En el caso de las aves marinas, los isótopos estables de nitrógeno y carbono han sido empleados principalmente como indicadores del régimen alimenticio. Este enfoque se basa en el hecho de que las concentraciones isotópicas de las cadenas tróficas se reflejan en los tejidos del consumidor. Además de para el estudio de la ecología trófica, los isótopos estables se han utilizado para estudiar el movimiento de las aves marinas a través de gradientes isotópicos, ya que los individuos que se mueven entre cadenas tróficas isotópicamente distintas pueden llevar con ellos información sobre la ubicación de áreas de alimentación anteriores. Los estudios que aplican la metodología de los isótopos estables al conocimiento de la ecología de las aves marinas muestran una clara evolución, desde los enfoques amplios y descriptivos, a los análisis detallados y basados en los individuos. El objetivo de este trabajo es mostrar los diferentes campos de aplicación de los isótopos estables en el estudio de la ecología de las aves marinas. Finalmente, ilustramos la utilidad de esta técnica considerando las particularidades de la comunidad de aves marinas del mar mediterráneo, sugiriendo diferentes cuestiones ecológicas y problemas de conservación que se podrían abordar empleando la técnica de los isótopos estables en esta comunidad.

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Crossing the Pillars of Hercules: Understanding transoceanic migrations of seabirds throughout their breeding range

Ramos

2019

Ecology and Evolution

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Variability in long‐distance migration strategies is still poorly understood due to the fact that individuals are often tracked from a single colony/population. Transoceanic migrations of Scopoli's shearwaters ( Calonectris diomedea ) across the Strait of Gibraltar (SoG) have been tracked from several breeding colonies isolatedly, and factors related to the variability in phenological schedules among different populations remain, therefore, not well‐understood. Using light‐level geolocator data, I examined the autumn (postbreeding) and spring (prebreeding) migratory passage dates through SoG of four populations of Scopoli's shearwater spread along the longitudinal breeding range of the species. Additionally, I also estimated the at‐sea activity patterns (from immersion data) during both migratory passages, as well as the body size (from morphometric data) of the individuals of these populations. On average, Scopoli's shearwaters leave the Mediterranean (cross SoG) on 31 October ± 1.8 days on their autumn migrations and return on 03 March ± 1.6 days on their spring migrations. At the population level, there was a clear gradient in the timing of crossing SoG: birds from the westernmost populations (Murcia, SE Spain) were the first ones in leaving the Mediterranean while easternmost breeders (Paximada, Crete) were the last ones. In spring, only birds from the largest breeding population (Zembra, Tunisia) seemed to advance their return and crossed SoG significantly earlier than birds tracked at the remaining populations. In both passages, shearwaters from central and eastern populations spent more time flying than their conspecifics from the western Mediterranean. Scopoli's shearwater populations display a differential phenology and behavior in their migratory passages through SoG. The longitudinal gradient in body size already reported for the species could be an evolutionary response to an obvious trade‐off between sharing common wintering grounds in the Atlantic Ocean and the temporal constraints of restoring physiological condition in those grounds. OPEN RESEARCH BADGES This article has earned an Open Data Badge for making publicly available the digitally‐shareable data necessary to reproduce the reported results. The data is available at https://hdl.handle.net/2445/128784 .

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Biogeography of the marine birds of a confined sea, the Mediterranean

Cited by 57 publications

References 27 publications

A new algorithm for the identification of dives reveals the foraging ecology of a shallow-diving seabird using accelerometer data

A new algorithm for the identification of dives reveals the foraging ecology of a shallow-diving seabird using accelerometer data

Using stable isotopes of nitrogen and carbon to study seabird ecology: applications in the Mediterranean seabird community

Crossing the Pillars of Hercules: Understanding transoceanic migrations of seabirds throughout their breeding range

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