Age, differential growth and mortality rates in unexploited populations of Florida gar, an apex predator in the Florida Everglades
| العنوان: | Age, differential growth and mortality rates in unexploited populations of Florida gar, an apex predator in the Florida Everglades |
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| المؤلفون: | W. F. Loftus, Daryl C. Parkyn, J. J. Herod, Leo G. Nico, Debra J. Murie |
| المصدر: | Fisheries Management and Ecology. 16:315-322 |
| بيانات النشر: | Wiley, 2009. |
| سنة النشر: | 2009 |
| مصطلحات موضوعية: | geography, education.field_of_study, geography.geographical_feature_category, Ecology, Lepisosteus platyrhincus, Mortality rate, Population, Aquatic animal, Wetland, Aquatic Science, Biology, biology.organism_classification, Sexual dimorphism, Fishery, education, Trophic level, Apex predator |
| الوصف: | Florida gar, Lepisosteus platyrhincus DeKay, were sampled in two canal systems in south Florida during 2000–2001 to estimate age, growth and mortality as part of the Everglades ecosystem-restoration effort. Tamiami (C-4) and L-31W canal systems had direct connections to natural wetlands of the Everglades and harboured large Florida gar populations. Of 476 fish aged, maximum ages were 19 and 10 years for females and males, respectively. Maximum sizes were also larger for females compared with males (817 vs 602 mm total length). Overall, female Florida gar from both Tamiami and L-31W were larger at age than males from L-31W that, in turn, were larger at any given age than males from Tamiami. Females also had lower rates of annual mortality (Z = 0.21) than males from L-31W (Z = 0.31) or males from Tamiami (Z = 0.54). As a large and long-lived apex predator in the Everglades, Florida gar may structure lower trophic levels. Regional- and sex-specific population parameters for Florida gar will contribute to the simulation models designed to evaluate Everglades restoration alternatives. |
| تدمد: | 1365-2400 0969-997X |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::26747919f6c3c1e5761b19c11695b9aa https://doi.org/10.1111/j.1365-2400.2009.00678.x |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........26747919f6c3c1e5761b19c11695b9aa |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 13652400 0969997X |
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