ПОПЕРЕДНІ РЕЗУЛЬТАТИ РАДАРНИХ СПОСТЕРЕЖЕНЬ НІЧНОЙ МІГРАЦІЇ ПТАХІВ В ІЗРАЇЛІ

Autor:	О. V. Matsyura
Rok vydání:	2011
Předmět:	Low altitude geography geography.geographical_feature_category biology Bird migration General Medicine Nocturnal Atmospheric sciences biology.organism_classification law.invention Mediterranean sea law Spring (hydrology) Waterfowl Environmental science Radar
Zdroj:	Biological Bulletin of Bogdan Chmelnitskiy Melitopol State Pedagogical University. 1:93
ISSN:	2226-9010 2225-5486
DOI:	10.15421/20111_28
Popis:	The results of radar-tracking supervisions over the night migration in Israel are submitted. The determination of flight altitudes, flight speeds, heights of maximum birds’ concentration, and migratory directions was performed. The average flight altitudes of night migration were 985 m in autumn and 1465 m in spring of 1998-2000, maximum flight altitudes were 2068 m and 2655 m correspondingly. The mean track direction of the night bird migration is 183° in spring and 6° in autumn. The migration of waterfowl over the Mediterranean Sea in the low altitude band was registered. Their average headings differ from the general migratory path, averaging 135° in autumn and 315° in spring. The average birds’ groundspeed was 14 m/s (50 km/h) in spring and 13 m/s (47 km/h) in autumn. Key words: Israel, radar, nocturnal bird migration.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3c837ff148e3062ccbe43c3f16b42837 https://doi.org/10.15421/20111_28 Zobrazit plný text záznamu