Current Herpetology最新文献_第3页

The Preference of Domestic Alien Toads, Bufo japonicus formosus, for Spawning Ponds on Sado Island 佐渡岛本地外来蟾蜍对产卵池的偏好

IF 0.7 4区生物学

Current Herpetology Pub Date : 2023-08-25 DOI: 10.5358/hsj.42.99

Kiyoto Sawada, T. Kamijo

{"title":"The Preference of Domestic Alien Toads, Bufo japonicus formosus, for Spawning Ponds on Sado Island","authors":"Kiyoto Sawada, T. Kamijo","doi":"10.5358/hsj.42.99","DOIUrl":"https://doi.org/10.5358/hsj.42.99","url":null,"abstract":"Abstract: Although the global population of many native frog species has declined in recent years, alien frog species have spread rapidly worldwide. In order to eradicate alien frogs, characterizing their spawning sites is highly important. In recent years, eastern-Japanese common toads, Bufo japonicus formosus, have caused negative impacts on native ecosystems though predation and poisoning deaths as a domestic alien species. However, their spawning sites preference is little known. Here, to clarify when and what kind of ponds B. j. formosus prefers for spawning, we conducted a field survey on Sado Island which is one of the invaded regions of this species. We recorded their breeding season and analyzed what kind of ponds they use mainly focusing on the pond structure and landscape to obtain basic information for their eradication. Our results clarified that alien B. j. formosus on Sado Island have the same reproductive features as the native population according to the environmental conditions (lunar phase, wind speed, and rainless period), and the ponds they prefer for spawning are in areas with more surrounding forest and less rice paddy area regardless of pond structures. In addition, we identified that B. j. formosus on Sado Island currently have not yet formed large populations. These findings provide useful information for their eradication not only Sado Island but also in areas where B. j. formosus is distributed as an alien species. It is possibile that B. j. formosus on Sado Island can be eradicated completely if extermination activity is started immediately.","PeriodicalId":56053,"journal":{"name":"Current Herpetology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42406141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Feeding Habits of the Japanese Fire-belly Newt (Ampbihia: Urodela: Salamandridae) in Central Honshu, Japan 日本本州中部火腹蝾螈(两栖目:尾尾目:蝾螈科)的摄食习性

IF 0.7 4区生物学

Current Herpetology Pub Date : 2023-08-25 DOI: 10.5358/hsj.42.162

Kotaro Ozaki, K. Nishikawa

引用次数: 0

Deeper or Shallower? Interactions and Temporal Variability in Choosing Burrowing Depth between Species of Economic Burrowing Frogs of Forest Area from Northeastern Thailand 更深还是浅层？泰国东北部林区经济潜蛙种间潜穴深度选择的相互作用和时间变异性

IF 0.7 4区生物学

Current Herpetology Pub Date : 2023-02-23 DOI: 10.5358/hsj.42.35

Akeapot Srifa, K. Lauprasert

引用次数: 0

Factors Affecting the Surface Activity of Japanese Common Toad, Bufo japonicus formosus (Amphibia: Bufonidae) during the Non-breeding Season 非繁殖季节影响日本蟾蜍体表活性的因素

IF 0.7 4区生物学

Current Herpetology Pub Date : 2023-02-23 DOI: 10.5358/hsj.42.17

T. Kusano, Tomoyo Miura, S. Terui, Y. Shiga

{"title":"Factors Affecting the Surface Activity of Japanese Common Toad, Bufo japonicus formosus (Amphibia: Bufonidae) during the Non-breeding Season","authors":"T. Kusano, Tomoyo Miura, S. Terui, Y. Shiga","doi":"10.5358/hsj.42.17","DOIUrl":"https://doi.org/10.5358/hsj.42.17","url":null,"abstract":"Abstract: Lunar phase and weather conditions are known to affect breeding activity of the Japanese common toad, Bufo japonicus formosus. However, information on toad activity during non-breeding season is very scarce. In this study, we investigated the influence of weather conditions and lunar phase on toad activity during the non-breeding season (April-November). Surface activity during the non-breeding season was monitored in Minami-ohsawa, Hachioji Tokyo from 2010 to 2014. The effects of weather conditions and the lunar phase on the number of toads captured were analyzed using Random Forests models (an ensemble machine learning method). Toads began to forage on the soil surface from late April and activity lasted until mid-November. Some meteorological variables such as temperature, wind, and atmospheric pressure affected toad activity, but the lunar phase, which is the most important variable in breeding activity, did not have an effect on surface activity of the toads during non-breeding season. However, differences were observed among adult males and females with respect to their response to meteorological variables: males responded positively to rainfall, but females did not. A distinct difference in the effect of temperature was also observed between adults and juveniles: juveniles became more active when daily minimum temperature was >15°C, although adults did not respond to an increase in temperature. Our results on sexual differences in weather-mediated activity and lack of the lunar phase effects during non-breeding season provide useful information for our understanding of life history of these toads.","PeriodicalId":56053,"journal":{"name":"Current Herpetology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46733498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A New Species of Small Green Treefrog (Pelodryadidae: Litoria) from the Lakekamu Basin in Southern Papua New Guinea 巴布亚新几内亚南部Lakekamu盆地的一种小型绿色树蛙（Pelodryadidae:Litoria）

IF 0.7 4区生物学

Current Herpetology Pub Date : 2023-02-23 DOI: 10.5358/hsj.42.43

S. Richards, David P Bickford

引用次数: 0

Female-biased Sex Ratios and Control Effects Observed in Two Local Populations of Red-eared Slider Turtles (Trachemys scripta elegans) in Western Japan 日本西部两个红耳滑龟（Trachemys scripta elegans）地方种群的雌性偏性比例及其控制效果

IF 0.7 4区生物学

Current Herpetology Pub Date : 2023-02-23 DOI: 10.5358/hsj.42.27

Tomoko Nishibori, N. Tada, M. Saka

{"title":"Female-biased Sex Ratios and Control Effects Observed in Two Local Populations of Red-eared Slider Turtles (Trachemys scripta elegans) in Western Japan","authors":"Tomoko Nishibori, N. Tada, M. Saka","doi":"10.5358/hsj.42.27","DOIUrl":"https://doi.org/10.5358/hsj.42.27","url":null,"abstract":"Abstract: High abundance of invasive red-eared slider (RES) turtles (Trachemys scripta elegans) in Japan has been a serious issue in freshwater ecosystems. Information on reproductive parameters, such as sex ratios, of RES turtles is needed to effectively control the invasive species. We conducted a long-term field study on RES turtles at two study sites: the Taisho River (a shallow river) and Teradaike Pond (an irrigation reservoir that was irregularly drained to maintain the embankment and water quality) in western Japan. Using trapping and muddling methods, we captured RES turtles and checked for sex, carapace length, and body weight. We also examined whether the population of RES turtles could be reduced by continuously removing the turtles captured at each study site. The sex ratio (male/both sexes) of RES turtles that could be sexed by external morphology (presumably adult turtles) was 0.27 at the Taisho River and 0.26 at Teradaike Pond. At both sites, these sex ratios were almost the same as those of RES turtles that could be sexed only by necropsy after euthanasia (presumably juvenile turtles). These sex ratios were markedly biased toward females and consistent between the adult and the juvenile turtles, thus suggesting that more females had been produced than males. At the Taisho River, a total of 1,366 RES turtles were captured and eliminated over more than ten years. Nevertheless, the annual catch did not tend to decrease and only an effect of preventing population growth was observed. At Teradaike Pond, a total of 1,831 RES turtles were captured over nine years. Nearly half of them were caught for the initial two years, during which the pond was drained. Thereafter, the annual catch of RES turtles clearly decreased. These results suggest that it is difficult to control RES turtles established in rivers but that it is feasible to effectively control RES turtles in enclosed small water bodies, such as irrigation reservoirs, by intensively capturing and eliminating the turtles during the drainage period.","PeriodicalId":56053,"journal":{"name":"Current Herpetology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49659308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Two New Species of Leptobrachella from Northern Thailand (Amphibia, Anura, Megophryidae) 泰国北部细臂虫二新种记述(两栖纲，无尾目，巨蝽科)

IF 0.7 4区生物学

Current Herpetology Pub Date : 2023-02-23 DOI: 10.5358/hsj.42.83

M. Matsui, S. Panha, Koshiro Eto

引用次数: 0

Skeletochronology of the Levant Green Frog, Pelophylax bedriagae (Camerano, 1882), in Southern Iran 伊朗南部Levant Green Frog的骨骼年表，Pelophilax bedriagae（Camerano，1882）

IF 0.7 4区生物学

Current Herpetology Pub Date : 2023-02-23 DOI: 10.5358/hsj.42.55

Maryam Khaloei, B. Fathinia, A. Shafaeipour

引用次数: 0

Change in the Guild Structure of a Snake Community in Japan over 30 Years 30年来日本蛇社行会结构的变化

IF 0.7 4区生物学

Current Herpetology Pub Date : 2023-02-23 DOI: 10.5358/hsj.42.74

Kiyoto Sawada, S. Kadowaki

{"title":"Change in the Guild Structure of a Snake Community in Japan over 30 Years","authors":"Kiyoto Sawada, S. Kadowaki","doi":"10.5358/hsj.42.74","DOIUrl":"https://doi.org/10.5358/hsj.42.74","url":null,"abstract":"Abstract: Long-term field studies have provided evidence of worldwide declines in vertebrate populations, including amphibians and reptiles. However, studies investigating the decline in snake populations are scarce. As obligate predators, snakes play important roles in local ecosystems and are in turn affected by their food resources. In the present study we investigated the seasonal abundance of snakes and their food habits in a rice paddy field and compared the results of the present study with those of a previous study that was conducted at the same site approximately 30 years ago. Our results showed that Elaphe quadrivirgata, a dietary generalist snake that had been one of the dominant species at the site, has drastically declined and that Rhabdophis tigrinus and Gloydius blomhoffii have remained as dominant species. Furthermore, in the present study, most of the stomach contents of R. tigrinus consisted of the Japanese tree frog, Dryophytes japonicus, whereas three frog species, D. japonicus, Rana japonica, and Pelophylax porosus porosus, had been the main prey of R. tigrinus 30 years ago. In addition, fewer individuals of R. tigrinus and G. blomhoffii contained food in their stomachs than 30 years ago. Our findings imply that a change in prey availability may have affected the guild structure of snakes at this study site, although further investigation is necessary to verify the reasons for the decline of the dietary generalist, E. quadrivirgata.","PeriodicalId":56053,"journal":{"name":"Current Herpetology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44350555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Intrapopulation Morphological Variation in Introduced African Clawed Frog, Xenopus laevis (Amphibia: Anura: Pipidae) in Japan 日本引进非洲爪蛙(两栖纲:无尾目:鼩科)种群内形态变异

IF 0.7 4区生物学

Current Herpetology Pub Date : 2023-02-23 DOI: 10.5358/hsj.42.64

Kento Takata, K. Nishikawa, Yuta Otsu, Hiroaki Ui

引用次数: 0