Results 41 to 50 of about 12,801 (205)
Immigration of banded Great Cormorants to inland areas
Japanese Journal of Ornithology, 2009 本研究では，広域的に移動するカワウPhalacrocorax carboにおいて，山梨県で発見された標識個体の記録から，沿岸域を中心とする大規模コロニーから内陸部への移入および飛来の傾向を調査した．2003年から2008年までの間に，銃器による捕獲で8個体，釣り針による捕獲で2個体，観察により3個体，計13個体の標識されたカワウが発見された．発見された水系別にみると，駿河湾に注ぐ富士川水系では，5個体全てが愛知県以西で標識された個体であった．一方，上流域が山梨県東部にあり相模湾，東京湾へと注ぐ相模川および多摩川では，8個体の標識されたカワウは，全て関東地方沿岸域で標識された個体であった．富士川と相模川，多摩川とで，カワウの標識された地域には明瞭な差異がみられ，富士川水系へは中部，近畿地方から，相模川，
Jun-ichi Tsuboi +5 more
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The influence of rivers on seabird foraging ecology
Biological Reviews, EarlyView.ABSTRACT Rivers act as vital arteries to the world's oceans, delivering fresh water and nutrients that sustain marine ecosystems. Globally, river flow increasingly is being altered by climate change and anthropogenic pressures; yet the significance of rivers to predatory marine species, such as seabirds, and the extent to which river‐related changes ...
Julia B. Morais +2 more
wiley +1 more source
Knowledge and Management of Aquatic Ecosystems, 2011 Since 1997, the North-east inter-regional delegation of the French National Institute for Water and Aquatic Ecosystems (ONEMA) has been running annual networked monitoring of the great cormorant (Phalacrocorax carbo sinensis ...
Collas M., Burgun V.
doaj +1 more source
The complexity of ecological impacts induced by great cormorants [PDF]
Hydrobiologia, 2015 Following decades of global extermination, the general population of the great cormorant (Phalacrocorax carbo L.) is on the rise. The lack of regular predators, highly skilled fish rapacity, rapid metabolism, significant rate of excretion and ability to form large nesting colonies on relatively small areas lead to numerous environmental consequences of
Klimaszyk, Piotr, Rzymski, Piotr
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Counting cases, conserving species: addressing highly pathogenic avian influenza in wildlife
Biological Reviews, EarlyView.ABSTRACT Highly pathogenic avian influenza (HPAI) has become a critical threat to wildlife, shifting from a seasonal epizootic to a persistent, year‐round panzootic with global consequences. Here, we summarise the origin, evolutionary mechanisms, and expanding host range of the current H5N1 virus (clade 2.3.4.4b) and assess its impact on wildlife. Over
Ulrich Knief +4 more
wiley +1 more source
Seasonal climatic niche and migration movements of Double‐crested Cormorants
Ecology and Evolution, 2022 Avian migrants are challenged by seasonal adverse climatic conditions and energetic costs of long‐distance flying. Migratory birds may track or switch seasonal climatic niche between the breeding and non‐breeding grounds. Satellite tracking enables avian
D. Tommy King +2 more
doaj +1 more source
Variability of clutch size in Cormorant (Phalacrocorax carbo sinensis) at the Jeziorsko Reservoir (Central Poland) in 2004 [PDF]
, 2008 The analysis of the clutch size variability in Cormorant (P. carbo sinensis) was based on study results in colony at the “Jeziorsko Reservoir” (central Poland) in 2004. There were used 328 broods controlled 3-5 times in the season.
Janiszewski, Tomasz +4 more
core
Archives of Polish Fisheries, 2017 Increases in the population abundance of the piscivorous great cormorant (Phalacrocorax carbo) has led to conflicts with fisheries. Cormorants are blamed for decreased fish catches in many lakes in Poland.
Traczuk Piotr, Kapusta Andrzej
doaj +1 more source
International Journal of Osteoarchaeology, EarlyView.ABSTRACT The golden eagle (Aquila chrysaetos) nests in rock cavities where it accumulates prey bone remains during the breeding season. Because nests can be reoccupied from year to year, these faunal elements can form remarkable bone accumulations and, in the sub‐fossil record, be mixed with assemblages derived from human or other predator activities ...
Juliette Ripond +5 more
wiley +1 more source
Ecologically determined natal philopatry within a colony of great cormorants [PDF]
Behavioral Ecology, 2001 Dispersal patterns of individuals within populations have implications for the social and genetic structure of local populations. Knowing what factors determine individual dispersal behavior is essential for predicting how the population structure will be influenced by environmental and demographic changes.
openaire +2 more sources