Bibliography Record
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Packard, Jane M.; Summers, Robert C.; Barnes, Lindsay B.
(detail)
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1983 |
Correction factors for observability of manatees during aerial surveys.
Manatee Population Research Rept. (Gainesville, Fla., Florida Cooperative Fish & Wildlife Research Unit) No. 3: 1-10. 1 tab. 1 fig.
–Summ.: Packard, Summers & Barnes (1985). See also Appendix 1. Uses actual counts of manatees identified in Blue Spring, together with 7 radiotagged manatees and 3 tagged with vinyl flags, to obtain correction factors for aerial surveys of the St. Johns River, Florida. Only 33-57% of manatees known to be in the area were sighted from the air. Factors influencing variation in counts are discussed, including habitat type, survey conditions, and observer bias. Correction factors obtained for each survey gave estimates closer to total counts than factors based on the mean ratio-of-radios-sighted over all surveys.
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Related Index Records (4)
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Aerial Surveys of Distribution
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1983 |
Packard et al. (TM; Florida; correction factors derived from radiotagging; 1-10.) |
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Florida
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1983 |
Packard et al. (TML; St. Johns R.; aerial survey; 1-10.) |
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Tagging Methods and Recognition
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1983 |
Packard et al. (TML; Florida; radiotagging, 4-8; vinyl flags, 5, 8.) |
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Trichechus manatus Linnaeus, 1758
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1983 |
Packard et al. (St. Johns R., Florida; aerial survey; 1-10.) |
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