Problems of Mediterranean–saharan Migration

Moreau, R. E.

doi:10.1111/j.1474-919x.1961.tb02454.x

Cited by 120 publications

(116 citation statements)

References 9 publications

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“…A similar timing maybe supposed for the other filamentous fungi. This interval is enough to cover a distance within 300-350 km [18,19] and it is compatible with a no-stop flight commonly performed by birds with low SFA (comprised between 0 and 1) [10]. The body fat is the first energy source dissipated by birds during migration and when SFA reaches a value of 0 or 1, a stop is necessary [10].…”

Section: Discussionsupporting

confidence: 55%

“…The migration of birds depends on the seasonality of food resources; it takes place in autumn and spring with a round trip to the resting areas and a return to the territories of nesting, respectively [18,19]. The islands of the Mediterranean Sea represent important resting sites (stop-over), where birds increase the fat lost during their flights between North Africa and Europe and vice versa [10].…”

Section: Introductionmentioning

confidence: 99%

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Filamentous Fungi Transported by Birds During Migration Across the Mediterranean Sea

et al. 2012

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The potential for the transport and diffusion of some pathogenic microorganisms by migratory birds is of concern. Migratory birds may be involved in the dispersal of microorganisms and may play a role of mechanical and biological vectors. The efficiency of dispersal of pathogenic microorganisms depends on a wide range of biotic and abiotic factors that influence the survival or disappearance of a given agent in a geographical area. In the present study, 349 migratory birds were captured in four sites (Mazara del Vallo, Lampedusa, Ustica and Linosa), representing the main stop-over points during spring and autumnal migration, and analyzed for the presence of filamentous fungi. A total of 2,337 filamentous fungi were isolated from 216 birds and identified by a combined phenotypic-genotypic approach to species level. Twelve species were identified in the study, with Cladosporium cladosporioides, Alternaria alternata, and Aspergillus niger as the most abundant. The transport of these fungal species isolated in this study is of considerable importance because some of these species can create dangers to human health.

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Section: Discussionsupporting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Filamentous Fungi Transported by Birds During Migration Across the Mediterranean Sea

et al. 2012

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“…Evidence assumed to support this non-stop theory was that migrants do not concentrate in oases, that, e.g., flycatchers (Muscicapidae) are hardly observed on the south Mediterranean coast in autumn, and that grounding should be avoided because of the danger of evaporative water loss (Moreau 1961(Moreau , 1972. Furthermore, numbers of birds found in the desert during daytime were regarded as being comparatively low compared to the total number of migrants estimated by Moreau (Wood 1989).…”

Section: Introductionmentioning

confidence: 99%

Spring passerine migrants stopping over in the Sahara are not fall-outs

2009

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The strategy of migrants crossing the Sahara desert has been the subject of debate, but recent evidence from radar studies has confirmed that most passerines use an intermittent migration strategy. The latter has also been suggested from previous studies in oases during autumn migration. It was found that migrants with relatively high fuel loads rest in the desert during daytime and continue migration during the following night, whereas lean migrants stopover in oases for several days to refuel. However, data from the Sahara are scarce for spring migration. We captured passerine migrants near Bîr Amrâne (22°47 0 N, 8°43 0 W) in the plain desert of Mauritania for 3 weeks during spring migration in 2004. We estimated flight ranges of 85 passerines stopping over in the desert to test whether they carried sufficient fuel loads to accomplish migration across the Sahara successfully. High fat loads of the majority of birds indicated that they were neither ''fallouts'' nor too weak to accomplish migration successfully. The flight range estimates, based on mean flight speeds derived from radar measurements (59 km/h), revealed that 85% of all birds were able to reach the northern fringe of the desert with an intermittent migration strategy. Furthermore, birds stopping over in an oasis (Ouadâne, 370 km to the southwest of Bîr Amrâne) did not carry consistently lower fuel loads compared to the migrants captured in the desert.

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“…Wilson, unpublished), Kenya (Pearson and Backhurst 1976a, b, and unpublished;Britton and Britton 1977, and unpublished) and Tanzania (L. and N. Baker, unpublished; B. Biebach and U. Bauchinger, unpublished). We considered data gathered from Egypt (Moreau 1961;Watson 1971;Goodman and Meininger 1989;B. Biebach and U. Bauchinger, unpublished), Eritrea (Smith 1957) and Somalia (Archer and Godman 1961;Ash and Miskell 1998;J.…”

Section: Body Mass Data and Speciesmentioning

confidence: 99%

“…The eco-physiological mechanisms adopted by longdistance migrating Palearctic birds for crossing ecological barriers have attracted the interest of ornithologists for more than 45 years (Moreau 1961(Moreau , 1972. Different ecological theories have been proposed to describe the seasonal migrations and flights for crossing such barriers (particularly the Sahara Desert).…”

Section: Introductionmentioning

confidence: 99%

Passerine migration strategies and body mass variation along geographic sectors across East Africa, the Middle East and the Arabian Peninsula

Yohannes¹,

Biebach

Nikolaus³

et al. 2008

J Ornithol

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Using the body mass estimates of 12 long-distance migrating Palearctic passerine species monitored at successive sites across the Eastern Africa flyway, we tested whether birds modulate their body mass according to specific seasonal demands across different geographic sectors. We compared body mass estimates across latitudinal distances and geographic sectors in Europe, the desert, Northeast Africa and East Africa. Our results show that, depending on the species and season considered, the average body mass increase or decrease is variable at and among different geographic sectors. By comparing the variation in body mass between different ecological sectors, we were able to show when and where migrants accumulate their migratory fuel reserves during migration.

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Problems of Mediterranean–saharan Migration

Cited by 120 publications

References 9 publications

Filamentous Fungi Transported by Birds During Migration Across the Mediterranean Sea

Filamentous Fungi Transported by Birds During Migration Across the Mediterranean Sea

Spring passerine migrants stopping over in the Sahara are not fall-outs

Passerine migration strategies and body mass variation along geographic sectors across East Africa, the Middle East and the Arabian Peninsula

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