Emergent Vegetation Coverage and Human Activities Influence Oviposition Microhabitat Selection by Invasive Bullfrogs (Lithobates catesbeianus) in Southwestern China

Li, Xuan; Guo, Yisong; Luo, Yu; Li, Yiming

doi:10.1670/14-151

Cited by 7 publications

(5 citation statements)

References 51 publications

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“…As for the vegetation cover on the surface of the pond, which was not chosen as a significant positive variable in this study by a small margin (95% CI=−0.01-1.86) (Table 1), it is often detected as a significant positive value for their pond selectivity (Bury and Whelan, 1984;Minowa et al, 2008). In previous studies, where vegetation cover was a significant positive variable in the presence of adults or eggs, the mean vegetation coverage in the ponds surveyed was greater than 30% (Minowa et al, 2008;Liu et al, 2016), and Clarkson and Devos (1986) showed that American bullfrog presence was significantly associated with 50% or more bank cover provided by emergent aquatic vegetation (reeds). On the other hand, the mean vegetation coverage was 12.7% in this study and such low vegetation coverage probably did not significantly affect bullfrog habitat selectivity.…”

Section: Habitat Pond Characteristicmentioning

confidence: 71%

Seasonal Emergence and Habitat Pond Use of Invasive American Bullfrog, Lithobates catesbeianus, on Sado Island, Japan

Sawada,

Kamijo

2024

Current Herpetology

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The American bullfrog Lithobates catesbeianus is a well-known invasive alien species recorded in over 40 countries and islands. It is necessary to elucidate their seasonal emergence and habitat water body characteristics for implementing efficient eradication activities. Sado Island, Japan, is home to several endemic and rare species, including the endangered Sado wrinkled frogs (Glandirana susurra) that are concerned to be negatively impacted by invasive American bullfrogs. Here, we surveyed 41 ponds for invasive American bullfrogs over the period preceding emergence to the start of oviposition to determine their seasonal emergence and habitat pond use. As in previous studies, we observed initiations of their post-hibernation activities such as emergence, mating call, and oviposition in that order as air temperature increased, and those activities were thought to begin as late as late-April, mid-May, and mid-July, respectively on Sado Island. For their habitat preferences, we confirmed that they mainly inhabit relatively deep ponds surrounded by rice paddy fields. Our results were broadly consistent with those of previous studies, with respect to the seasonal emergence and habitat pond characteristics of American bullfrogs on Sado Island. Since our results suggest an overlap in habitat and pond usage season between American bullfrogs and Sado wrinkled frogs, we highly recommend implementing bullfrog eradication activities to conserve the Sado wrinkled frog population. This study provided the basic ecological information for selecting appropriate seasons and ponds for implementing bullfrog eradication activities.

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Section: Habitat Pond Characteristicmentioning

confidence: 71%

Seasonal Emergence and Habitat Pond Use of Invasive American Bullfrog, Lithobates catesbeianus, on Sado Island, Japan

Sawada,

Kamijo

2024

Current Herpetology

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“…Because the biotopes had permanent lentic environments, they were inhabited by invasive alien animals that favor permanent water environments (Lithobates catesbeianus and Procambarus clarkii). These alien species strongly affect native amphibians through predation (Cruz and Rebelo 2005;Liu et al 2015) and might decrease the abundance of juvenile P. p. brevipodus in the biotope area. Additionally, as P. p. brevipodus is an opportunistic predator, the aggregation of larger individuals in the biotopes might also decrease juveniles via cannibalization.…”

Section: Discussionmentioning

confidence: 99%

Roles of Different Hydroperiod Habitats in Neighboring Rice Paddies and Biotopes in Supporting an Endangered Pond Frog Population in Japan

Naito,

Sakai,

Natuhara

et al. 2023

Preprint

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The Nagoya Daruma pond frog Pelophylax porosus brevipodus (formerly Rana porosa brevipoda) requires a wet environment year-round, but such habitats have generally been lost due to improved rice paddy drainage such that the frog populations have been decreasing. There have been attempts to create permanent pools in rice paddy areas to help the populations recover, but the basic life history patterns and population dynamics in both environments have not been well studied. We captured frogs in rice paddies and adjacent biotopes. Using capture–mark–recapture data with 816 marked individuals, we compared frog demographics and population structure using a Jolly–Seber POPAN model. Constructed biotopes had conditions favoring long-term persistence. For example, biotopes had larger frogs of both sexes than rice paddies. The ratio of juveniles to adults was lower in biotopes than rice paddies. By contrast, rice paddies were an important habitat for breeding and producing new frogs.The two habitats complemented each other to support the local frog population. Because P. p. brevipodus is now exclusively distributed in rice paddy areas, the creation of permanent pools is a feasible way to improve habitat quality, especially in modernized rice paddy areas with few permanent lentic habitats.

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“…We used a Mann-Whitney U test to compare the differences in the 14 continuous habitat variables between blue sheep and Alashan red deer, then used the Chi-square test to analyze whether there are differences in the selection of five categorical variables. Principal component analysis was used to describe the vegetation characteristics of the habitat utilized by the sheep and deer (Liu et al 2016). We did not rotate the variables and only extracted components that had eigenvalues ≥ 1.…”

Section: Discussionmentioning

confidence: 99%

Comparative analysis of winter diets and habitat use by the sympatric blue sheep (Pseudois nayaur) and Alashan red deer (Cervus alashanicus) in the Helan Mountains, China

et al. 2018

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Emergent Vegetation Coverage and Human Activities Influence Oviposition Microhabitat Selection by Invasive Bullfrogs (Lithobates catesbeianus) in Southwestern China

Cited by 7 publications

References 51 publications

Seasonal Emergence and Habitat Pond Use of Invasive American Bullfrog, Lithobates catesbeianus, on Sado Island, Japan

Seasonal Emergence and Habitat Pond Use of Invasive American Bullfrog, Lithobates catesbeianus, on Sado Island, Japan

Roles of Different Hydroperiod Habitats in Neighboring Rice Paddies and Biotopes in Supporting an Endangered Pond Frog Population in Japan

Comparative analysis of winter diets and habitat use by the sympatric blue sheep (Pseudois nayaur) and Alashan red deer (Cervus alashanicus) in the Helan Mountains, China

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