Conservation Measures to Increase Breeding Success of Cliff Swallows (Petrochelidon pyrrhonota) in Massachusetts

2021 ◽  
Vol 28 (2) ◽  
Author(s):  
Mara Silver ◽  
Linda L. Merry ◽  
Charles R. Brown
Keyword(s):  
Breeding Success ◽  
Petrochelidon Pyrrhonota ◽  
Conservation Measures

scholarly journals Conservation measures undertaken to improve the population status of eastern imperial eagle (Aquila heliaca) in Bulgaria

2014 ◽  
Vol 8 (1) ◽  
pp. 27-39 ◽  
Author(s):  
Dimitar Demerdzhiev ◽  
Stoycho Stoychev ◽  
Dobromir Dobrev ◽  
Svetoslav Spasov ◽  
Nikolay Terziev
Keyword(s):  
Breeding Success ◽  
Mortality Factors ◽  
Artificial Nests ◽  
Mean Values ◽  
Breeding Parameters ◽  
Conservation Measures ◽  
Imperial Eagle ◽  
The Mean ◽  
Aquila Heliaca ◽  
Supplementary Feed

Abstract This study presents the results of conservation measures undertaken and their impact on the eastern imperial eagle population in Bulgaria. The species is distributed in the south-eastern part of the country, as there is only one known pair in central Bulgaria. During the period 2009-201 3, 28 different breeding territories were occupied. The population increased by 20%, as the number of pairs that occupied breeding territories increased from 20 in 2009 to 24 in 201 3. In general, the mean values of the breeding parameters of the eastern imperial eagle population for the period 2009-201 3 were as follows: productivity (P) 1 .03±0.1 8; breeding success (BS) 1 .1 8±0.21 ; and fledgling success (FS) 1 .68±0.1 6. The annual survival rate of breeders varied from 0.795 to 0.932. The most important factor causing the mortality of immature eagles was electrocution. Shooting and poisoning have become important mortality factors, too. Guarded pairs had a higher mean breeding success (1 .32±0.88) than non-guarded pairs (1 .06±0.91 ). As a whole, 39% of all artificial nests installed in the period 2009-201 3 were occupied by birds of different species. During the period 2008-201 3, a total of 23 juvenile eastern imperial eagles were tagged with satellite/GPS transmitters. In addition, 608 hazardous electric poles in the territories of seven pairs were insulated. Supplementary feed was provided for 1 4 pairs once a week during the autumn-winter seasons (October - March). A total of 483 supplementary feedings took place, 450 ofwhich also included monitoring in order to record the effectiveness of this activity.

scholarly journals Temperature and breeding success for Cliff Swallows (Petrochelidon pyrrhonota) nesting on man-made structures: ecological traps?

2019 ◽  
Vol 97 (5) ◽  
pp. 429-435
Author(s):  
Tara L. Imlay ◽  
Donavon Nickerson ◽  
Andrew G. Horn
Keyword(s):  
Breeding Success ◽  
Bird Species ◽  
Ecological Trap ◽  
Suitable Habitat ◽  
Population Declines ◽  
Ambient Temperatures ◽  
Individual Fitness ◽  
Petrochelidon Pyrrhonota ◽  
Nesting Site ◽  
Nestling Survival

When an environmental cue that previously signaled a suitable habitat leads an animal to use an unsuitable site, individual fitness can decrease, ultimately leading to population declines. Such “ecological traps” may be particularly likely for birds that use human infrastructure for nesting. Here we tested whether high nest temperatures and the physical properties of barns are associated with lower breeding success for a declining population of Cliff Swallows (Petrochelidon pyrrhonota (Vieillot, 1817)). We monitored nests under barn eaves below wood and metal roofs to determine nestling survival and mass, and recorded temperature under barn eaves, to relate ambient temperature to eave temperature. We found that eave temperature increased with ambient temperatures and was higher at high temperatures and lower at cool temperatures under metal roofs than wood roofs. Nestling survival was lower during periods with higher ambient temperatures, and both survival and mass were lower under metal roofs. Our findings suggest that barn eaves, especially those with metal roofs, may be an ecological trap for Cliff Swallows, where a seemingly suitable nesting site early in the breeding season results in low breeding success. Furthermore, warming temperatures may lead to ecological traps for other bird species, particularly those nesting in man-made structures.

Climate change and breeding success: decline of the capercaillie in Scotland

2001 ◽  
Vol 70 (1) ◽  
pp. 47-61 ◽  
Author(s):  
Robert Moss ◽  
James Oswald ◽  
David Baines
Keyword(s):  
Climate Change ◽  
Breeding Success

The Breeding Success of Lesser Kestrels Falco naumanni in Mongolia

2020 ◽  
Vol 19 (1) ◽  
pp. 73
Author(s):  
Onolragchaa Ganbold ◽  
John Azua ◽  
Woon Kee Paek ◽  
Munkhbaatar Munkhbayar ◽  
Ariunbold Jargalsaikhan ◽  
...  
Keyword(s):  
Breeding Success ◽  
Falco Naumanni

THE IMPORTANCE OF THE RED BOOK OF SOILS FOR MONITORING AND JUSTIFICATION OF CONSERVATION MEASURES

2020 ◽  
Author(s):  
O.S. Bezuglova ◽  
Keyword(s):  
Chemical Properties ◽  
Natural State ◽  
Soil Maps ◽  
Rostov Region ◽  
Conservation Measures ◽  
Background Data ◽  
The Russian Federation ◽  
Physical And Chemical ◽  
And Chemical Properties

Rostov Region belongs to the highly protected natural territories characterized by the continuous plowing. There territories are the only reserves with the soils preserved in their natural state. However, these areas often lack detailed information about the soils quality and composition. Surveying soils on these territories is crucial for determination of their basic physical and chemical properties. The resulted compilation of soil maps could lay a foundation for creating the Red Book of Soils and the formation of a section in the soil-geographical database of the Russian Federation. Subsequently, such information can be used as a background data for the main types of soils in the region. It will be also valuable during monitoring and justification of conservation measures.

Cliff Swallow (Petrochelidon pyrrhonota)

2017 ◽  
Author(s):  
Charles R. Brown ◽  
Mary B. Brown ◽  
Peter Pyle ◽  
Michael A. Patten
Keyword(s):  
Cliff Swallow ◽  
Petrochelidon Pyrrhonota
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