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|a Status of the Osprey in Everglades National Park |h [electronic resource] |b Report M-679 |y English. |
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|a Homestead ; |a Florida : |b National Park Service, U.S. Department of the Interior, |c 1982-08. |
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|a Please contact the owning institution for licensing and permissions. It is the user's responsibility to ensure use does not violate any third party rights. |
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|a Osprey (Pandion haliaetus) populations in various parts of North America decreased during the 1950's and 19601s, primarily because of pesticide contamination, with eastern populations being most affected (Henny and Ogden 1970). These populations are migratory and winter in the West Indies and in Central and South America (Zarn 1974). The Florida population, considered to be non-migratory by Ogden (1978), contained low levels of pesticide contaminates. The major cause of localized population decreases that have taken place in the state has been destruction of habitat (Ogden 1978). These ospreys nest throughout Florida, but nesting birds are less common in northwestern Florida and rare around the Gulf of
Mexico (Ogden 1978). Nesting near bodies of water such as lakes, rivers, and coastal areas, reeding ospreys are particularly common along the St. Johns River, in Ocala National Forest and in Everglades National Park. The status of a major segment of the latter population was documented between 1968 and 1974 by Ogden (1975, 1977). He conducted aerial surveys in Florida Bay in the late 1960's and early 1970's and measured nesting effort and productivity on three islands. He concluded that the Florida Bay osprey population was stable (Henny and Ogden 1970) and, on the three study islands, that the number of ospreys and percentage of
successful nests remained approximately constant over five years (Ogden 1977).
The stated purpose of the previous study was to provide a base line for monitoring the status of the osprey population in Florida Bay and by extension the ecological well-being of the Florida Bay ecosystem (Ogden 1977). Ten years after the initiation of that study, we began a three-year study of population status to determine whether population changes had occurred in the interim. Concurrently Poole (in prep.) restudied productivity on the same three islands on which Ogden did his work. In this paper we analyze the nesting population of osprey in southern
Florida during the breeding seasons of 1978-1980 and compare our findings to those of the previous study. We conclude from this analysis that a substantial decrease has occurred in the number of ospreys nesting in Florida Bay. |
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|a Electronic reproduction. |c Florida International University, |c South Florida Natural Resource Center, |d 2015. |f (dpSobek) |n Mode of access: World Wide Web. |n System requirements: Internet connectivity; Web browser software. |
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|a South Florida Natural Resource Center. |
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|a SuDoc number: I 29.95: M-679 |
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|a Everglades National Park (Fla.). |
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|a South Florida Natural Resources Center/South Florida Research Center, Everglades National Park. |
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|a Everglades Digital Library: Reclaiming the Everglades. |
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|a South Florida Collection. |
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|a Federal Documents Collection. |
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|a dpSobek |c Everglades Digital Library: Reclaiming the Everglades |
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|u http://dpanther.fiu.edu/dpService/dpPurlService/purl/FI00521649/00001 |y Click here for full text |
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|a http://dpanther.fiu.edu/sobek/content/FI/00/52/16/49/00001/FI00521649thm.jpg |
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|a Everglades Digital Library: Reclaiming the Everglades |
