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|a The Nest Environment of the American Crocodile (Crocodylus acutus) |h [electronic resource] |b Report T-671. |
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|a Homestead ; |a Florida : |b National Park Service, U.S. Department of the Interior, |c 1982-06. |
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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 The American crocodile (Crocodylus acutus) population in southern Florida
has shown a steady decline over the last century, and it has been suggested
(~gden, 1978) that recent protective efforts may not have been successful in
reversing this trend, although the population may be stabilizing in recent
years (~ushlan, in press; Kushlan and Mazzotti, in prep.). On the
assumption that adults are adequately protected, any decline would most
likely be due to inadequate recruitment from younger stock. Causes for the
latter could be a decreased reproductive success resulting in fewer eggs
laid, or an increased mortality at some stage in development between the
embryo and the juvenile.
The small population of crocodiles in southern Florida (estimated at 100-400
nonjuvenile adults by Odgen, 1978) live at the northernmost limits of the
range for that species and are probably near the limit of certain ecological
tolerances (~ushlan, in press). Ogden (1978) suggested that embryonic mortality was an important factor in population limitation. The conditions found in the nest microhabitat are likely to have a significant influence on embryoni c development such that inappropriate changes or circumstances could be a major cause of egg mortality. For example, Ferguson (1981) has
shown that alligator eggs (Alligator mississippiensis) incubated without nesting media fail to hatch. Unfortunately, there is little in£ ormation on the nest environment of 5. acutus in its natural habitat and therefore no objective grounds for assessing this risk. |
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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: T-671 |
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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/FI02584671/00001 |y Click here for full text |
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|a http://dpanther.fiu.edu/sobek/content/FI/02/58/46/71/00001/FI02584671thm.jpg |
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|a Everglades Digital Library: Reclaiming the Everglades |
