Initial dispersal behavior and survival of non-native juvenile Burmese python']pythons (Python']Python bivittatus) in South Florida

被引:6
作者
Pittman, Shannon E. [1 ,2 ]
Bartoszek, Ian A. [3 ]
机构
[1] Athens State Coll, Coll Arts & Sci, S 303 C,Waters Hall, Athens, AL 35611 USA
[2] Davidson Coll, Dept Biol, David, NC USA
[3] Conservancy Southwest Florida, Naples, FL 34102 USA
基金
美国国家科学基金会;
关键词
Burmese [!text type='python']python[!/text; Dispersal; Movement; Invasive species; Management; EVERGLADES NATIONAL-PARK; MOLURUS-BIVITTATUS; MOVEMENT BEHAVIOR; ECONOMIC COSTS; SPREAD; INVASION; RATES;
D O I
10.1186/s40850-021-00098-2
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
Background Dispersal behavior is a critical component of invasive species dynamics, impacting both spatial spread and population density. In South Florida, Burmese pythons (Python bivittatus) are an invasive species that disrupt ecosystems and have the potential to expand their range northward. Control of python populations is limited by a lack of information on movement behavior and vital rates, especially within the younger age classes. We radio-tracked 28 Burmese pythons from hatching until natural mortality for approximately 3 years. Pythons were chosen from 4 clutches deposited by adult females in 4 different habitats: forested wetland, urban interface, upland pine, and agricultural interface. Results Known-fate survival estimate was 35.7% (95% CI = 18% - 53%) in the first 6 months, and only 2 snakes survived 3 years post hatching. Snakes moving through 'natural' habitats had higher survival than snakes dispersing through 'modified' habitats in the first 6- months post-hatching. Predation was the most common source of mortality. Snakes from the agricultural interface utilized canals and displayed the largest net movements. Conclusions Our results suggest that pythons may have lower survival if clutches are deposited in or near urbanized areas. Alternatively, juvenile pythons could quickly disperse to new locations by utilizing canals that facilitate linear movement. This study provides critical information about behavioral and life history characteristics of juvenile Burmese pythons that will inform management practices.
引用
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页数:13
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