scholarly journals Annual migration of Houbara Bustard Chlamydotis undulata macqueenii from the United Arab Emirates

1999 ◽  
Vol 9 (2) ◽  
pp. 155-161 ◽  
Author(s):  
Frédéric Launay ◽  
Olivier Combreau ◽  
Mohammed Al Bowardi
Keyword(s):  
United Arab Emirates ◽  
Annual Cycle ◽  
Return Migration ◽  
Aral Sea ◽  
Migration Routes ◽  
Conservation Measures ◽  
Breeding Grounds ◽  
Houbara Bustard ◽  
Outward Migration ◽  
Kyzyl Kum

SummaryThe Houbara Bustard Chlamydotis undulata macqueenii is a regular winter visitor from northern breeding grounds to the United Arab Emirates (UAE) but the migration routes and origin of these birds are still poorly known. Five bustards were fitted with platform transponder terminals in UAE in the winter of 1996-1997. The overall distances covered by the birds were very variable, ranging from 3,747 km to 11,938 km. The return migration date of Houbara from UAE ranged from 19 March to 2 April 1997, while the outward migration began from 10 September to 7 November 1997. The Houbara spent the summer n i different areas, namely China (north of lake Nor), Kazakhstan (Kyzyl Kum desert and north of the Aral Sea), Uzbekistan (south of the Aral Sea) and north Afghanistan. These results are the first to describe an annual cycle of migration for Houbara Bustards and should aid the development of appropriate conservation measures for this species.

scholarly journals Habitat loss on the breeding grounds is a major contributor to population declines in a long-distance migratory songbird

2021 ◽  
Vol 288 (1949) ◽  
Author(s):  
Michael T. Hallworth ◽  
Erin Bayne ◽  
Emily McKinnon ◽  
Oliver Love ◽  
Junior A. Tremblay ◽  
...  
Keyword(s):  
Habitat Loss ◽  
Annual Cycle ◽  
Forest Loss ◽  
Population Declines ◽  
Migration Routes ◽  
Long Distance ◽  
Migratory Songbirds ◽  
Breeding Grounds ◽  
Migratory Songbird ◽  
Land Use Practices

Many migratory species are declining and for most, the proximate causes of their declines remain unknown. For many long-distance Neotropical migratory songbirds, it is assumed that habitat loss on breeding or non-breeding grounds is a primary driver of population declines. We integrated data collected from tracking technology, community science and remote sensing data to quantify migratory connectivity (MC), population trends and habitat loss. We quantified the correlation between forest change throughout the annual cycle and population declines of a long-distance migratory songbird, the Connecticut warbler ( Oporornis agilis , observed decline: −8.99% yr −1 ). MC, the geographic link between populations during two or more phases of the annual cycle, was stronger between breeding and autumn migration routes (MC = 0.24 ± 0.23) than between breeding and non-breeding locations (MC = −0.2 ± 0.14). Different Connecticut warbler populations tended to have population-specific fall migration routes but overlapped almost completely within the northern Gran Chaco ecoregion in South America. Cumulative forest loss within 50 km of breeding locations and the resulting decline in the largest forested patch index was correlated more strongly with population declines than forest loss on migratory stopover regions or on wintering locations in South America, suggesting that habitat loss during the breeding season is a driver of observed population declines for the Connecticut warbler. Land-use practices that retain large, forested patches within landscapes will likely benefit breeding populations of this declining songbird, but further research is needed to help inform land-use practices across the full annual cycle to minimize the impacts to migratory songbirds and abate ongoing population declines.

Tapeworm larvae in Artemia franciscana (Crustacea: Anostraca) in the Godolphin lakes of Dubai (United Arab Emirates) throughout an annual cycle

2018 ◽  
Vol 94 ◽  
Author(s):  
S. Sivakumar ◽  
K. Hyland ◽  
R.K. Schuster
Keyword(s):  
United Arab Emirates ◽  
Annual Cycle ◽  
Artemia Franciscana ◽  
Lower Prevalence ◽  
Cestode Species ◽  
Intensity Of Infection ◽  
Brine Shrimps

AbstractA total of 1840 brine shrimps (Artemia franciscana) were examined for cestode larvae at monthly intervals between November 2015 and June 2016. Of these, 663 (36.03%) specimens were infected with cysticercoids of seven cestode species in numbers between one and sixteen. During the first four months of examination, the percentage of infected shrimps was low but rose significantly with increasing temperatures in March, reaching maximum values in May. Flamingolepis liguloides and Flamingolepis flamingo showed the highest prevalence overall, at 25.3 and 10.7%, respectively. The intensity of infection was 1–10 and 1–4 cysticercoids, respectively. Eurycestus avoceti, Wardium stellorae, Gynandrotaenia stammeri, Anomotaenia tringae and Confluaria podicipina occurred at lower prevalence of 4.5, 3.2, 1.7, 0.3 and 0.05%, respectively. Up to four species were detected in one host.

scholarly journals Historical and current distribution, population size and possible migration routes of the Blue Swallow Hirundo atrocaerulea in Africa

2010 ◽  
Vol 20 (3) ◽  
pp. 240-254 ◽  
Author(s):  
STEVEN W. EVANS ◽  
H. BOUWMAN
Keyword(s):  
Population Size ◽  
Democratic Republic ◽  
Sub Saharan Africa ◽  
Total Current ◽  
Migration Routes ◽  
Breeding Grounds ◽  
Republic Of The Congo ◽  
Migratory Routes ◽  
Sub Saharan ◽  
And Migration

SummaryThe Blue Swallow Hirundo atrocaerulea is restricted to sub-Saharan Africa, its population size previously estimated at fewer than 1,500 pairs, and is classified as Vulnerable. A better understanding of its current distributional range, population size, protection status and migration routes would improve our ability to conserve the species and the grassland and wetland habitat on which it depends. We now estimate that the Blue Swallow population in the 1850s may have numbered between 1,560 and 2,300 pairs. Based on an assessment of available data, we now estimate the total current Blue Swallow population at 1,006 pairs or 2,012 individuals, an estimated 36–56% decline over the last 150 years. There may be three separate Blue Swallow sub-populations and seven separate migratory routes between their breeding and non-breeding grounds. The Blue Swallow’s range in South Africa and Swaziland has contracted by 74%. The majority of Blue Swallows occupy unprotected areas on their non-breeding grounds in the Democratic Republic of the Congo, Uganda and Kenya. The Blue Swallow population in Africa will continue to decline unless the causes of reduction in Blue Swallow habitat quantity and quality can be stopped and sufficient and additional habitat set aside to sustain viable Blue Swallow populations throughout their range.

scholarly journals Discovery of breeding grounds of a Siberian Crane Grus leucogeranus flock that winters in Iran, via satellite telemetry

2002 ◽  
Vol 12 (4) ◽  
pp. 327-333 ◽  
Author(s):  
Yutaka Kanai ◽  
Meenakshi Nagendran ◽  
Mutsuyuki Ueta ◽  
Yuri Markin ◽  
Juhani Rinne ◽  
...  
Keyword(s):  
Satellite Telemetry ◽  
Migration Routes ◽  
Breeding Area ◽  
Volga River ◽  
Western Population ◽  
Siberian Crane ◽  
Grus Leucogeranus ◽  
Volga River Delta ◽  
Breeding Grounds ◽  
Conservation Plan

Siberian Crane Grus leucogeranus occurs only in Asia, and is Critically Endangered. The western population of the species has been almost extirpated, wintering at just two known sites, in Iran and India. To help conserve species that migrate long distances it is essential to have a comprehensive conservation plan that includes identification of migration routes and key resting areas. One Siberian Crane was satellite-tracked from the south Caspian Sea to its breeding grounds in Russia during the spring of 1996. The crane began migration on 6 March, and completed its migration on 1 May. This destination was formerly unknown as a breeding area for the species. During migration, the crane rested primarily at the eastern end of the Volga River delta. This suggests that the delta may be an important resting site for Siberian Crane.

Habitat use by houbara bustard (Chlamydotis undulata macqueenii) in arid shrubland in the United Arab Emirates

1997 ◽  
Vol 35 (1) ◽  
pp. 111-121 ◽  
Author(s):  
F. Launay ◽  
D. Roshier ◽  
R. Loughland ◽  
S.J. Aspinall
Keyword(s):  
Habitat Use ◽  
United Arab Emirates ◽  
Houbara Bustard

scholarly journals Open-ocean orientation and return migration routes of chum salmon based on temperature data from data storage tags

2001 ◽  
Vol 216 ◽  
pp. 235-252 ◽  
Author(s):  
KD Friedland ◽  
RV Walker ◽  
ND Davis ◽  
KW Myers ◽  
GW Boehlert ◽  
...  
Keyword(s):  
Data Storage ◽  
Return Migration ◽  
Chum Salmon ◽  
Temperature Data ◽  
Open Ocean ◽  
Migration Routes ◽  
Data Storage Tags

Optical dating of arid coastline deposits – the challenge of dating evaporitic sediments

2020 ◽  
Author(s):  
Andreas Lang ◽  
Mohammad Alsuwaidi ◽  
Barbara Mauz
Keyword(s):  
Dose Rate ◽  
Sea Level ◽  
United Arab Emirates ◽  
Open Systems ◽  
Arabian Gulf ◽  
Human Migration ◽  
Migration Routes ◽  
Optical Dating ◽  
Sedimentary Environments ◽  
Marginal Sea

<p>The Arabian Gulf is a small shallow marginal sea of the Indian Ocean. Its Pleistocene-Holocene sea-level history is of great interest for reconstructing human migration routes into Mesopotamia as well as for better understanding the recent convergence rate between the Arabian and Eurasian plates. For establishing the sea-level history, the ages of past shoreline deposits must be known.</p><p>Here we present the optical dating procedure of intertidal carbonate deposits sampled in the coastal area south of Abu Dhabi city (United Arab Emirates). We focus on the challenge of determining a reliable dose rate of samples that are in secular disequilibrium and compare our results with age data obtained from AMS <sup>14</sup>C dating.</p><p>For optical dating quartz grains of 90-150 mm were extracted and the equivalent dose was determined from 1 mm aliquots using a standard single-aliquot regenerative dose protocol. Data analysis employed statistical analysis to approximate the palaeodose assuming that all grains measured were sufficiently bleached at time of deposition. For determining the dose rate the radionuclide activities were first quantified by simulating the radiation field of the chemically and physically described samples using gamma spectrometry. These modern activities were then taken to back calculate the activities using well-described double differential equations for open systems. This approach leads to multiple solutions.</p><p>We show details of the approach and discuss on the basis of the solutions reasonable open-system assumptions for various sedimentary environments.</p>

Migration Routes and Stopover Sites of Upland Geese Chloephaga Picta in South America

2018 ◽  
Vol 11 (2) ◽  
pp. 89-99 ◽  
Author(s):  
Julieta Pedrana ◽  
Klemens Pütz ◽  
Lucía Bernad ◽  
Juan Pablo Seco Pon ◽  
Antonella Gorosabel ◽  
...  
Keyword(s):  
South America ◽  
Large Scale ◽  
Buenos Aires Province ◽  
Migration Routes ◽  
Stopover Sites ◽  
Precise Knowledge ◽  
Southern Patagonia ◽  
Breeding Grounds ◽  
Migratory Routes ◽  
Upland Goose

The Upland Goose (Chloephaga picta picta) is a migratory species of South America, which breeds from September to April in Patagonia (Argentina and Chile) and winters from May to September in the southern Pampas (Argentina). Despite some protection in both countries, this species is still persecuted and large numbers are killed by unregulated hunting. Therefore, precise knowledge of their migratory routes is vital to ensure protection of necessary resources and sites throughout the year. We deployed five miniaturised satellite transmitters on adult Upland Geese to gather data about breeding, wintering and stopover sites all along their migratory routes. We aimed to identify important areas in the wintering and breeding grounds through kernel density analyses, and to match these sites along the migration routes with protected areas. Tracked birds exhibited different migration routes and reached different breeding grounds. Two individuals travelled from their wintering grounds in Buenos Aires province to their presumed breeding areas in southern Patagonia. However, we also found different stopover sites from another bird in northern Patagonia, from the ones postulated before, and evidence that some Upland Geese are not large-scale migrants. Our results highlight a considerable amount of plasticity in Upland Geese migratory behaviour. This study represents an essential first step towards identifying important stopover sites along the Upland Geese flyways and it also highlights the lack of protected habitats along most of their migration routes.

scholarly journals Breeding origins and migratory connectivity at a northern roost of Vaux’s Swift, a declining aerial insectivore

The Condor ◽  
2019 ◽  
Vol 121 (3) ◽  
Author(s):  
Ellis L Smith ◽  
Matthew W Reudink ◽  
Peter P Marra ◽  
Ann E Mckellar ◽  
Steven L Van Wilgenburg
Keyword(s):  
Stable Isotope ◽  
Annual Cycle ◽  
Isotope Analysis ◽  
Vancouver Island ◽  
Cluster Solution ◽  
Migratory Connectivity ◽  
Breeding Sites ◽  
Aerial Insectivores ◽  
Breeding Grounds ◽  
Weak Connectivity

ABSTRACT Populations of Vaux’s Swift (Chaetura vauxi), like those of many aerial insectivores, are rapidly declining. Determining when and where populations are limited across the annual cycle is important for their conservation. Establishing the linkages between wintering and breeding sites and the strength of the connections between them is a necessary first step. In this study, we analyzed 3 stable isotopes (δ13C, δ15N, δ2H) from feathers collected during spring migration from Vaux’s Swifts that perished during a stopover on Vancouver Island, British Columbia, Canada. We previously analyzed claw tissue (grown during winter) from the same individuals, revealing that the swifts likely wintered in 2 or 3 locations/habitats. Here, we used stable isotope analysis of flight feathers presumed to have been grown on, or near, the breeding grounds to determine the likely previous breeding locations and presumed destinations for the swifts. Stable isotope values (δ13C, δ15N, δ2H) showed no meaningful variation between age classes, sexes, or with body size. Surprisingly, ~26% of the birds sampled had feather isotope values that were not consistent with growth on their breeding grounds. For the remaining birds, assigned breeding origins appeared most consistent with molt origins on Vancouver Island. Overall, migratory connectivity of this population was relatively weak (rM = 0.07). However, the degree of connectivity depended on how many winter clusters were analyzed; the 2-cluster solution suggested no significant connectivity, but the 3-cluster solution suggested weak connectivity. It is still unclear whether low migratory connectivity observed for Vaux’s Swift and other aerial insectivores may make their populations more or less vulnerable to habitat loss; therefore, further efforts should be directed to assessing whether aerial insectivores may be habitat limited throughout the annual cycle.

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