Herpetological Bulletin最新文献_第7页

05. Amelanism in the Nicaraguan slider turtle Trachemys grayi in Costa Rica 05.哥斯达黎加尼加拉瓜滑龟Trachemys grayi的Amelanism

Herpetological Bulletin Pub Date : 2022-12-01 DOI: 10.33256/hb162.1920

J. M. Mora, Lucía I. López, G. Chaves, José Miguel Mora

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12. First record of male-male combat in the Malagasy giant hognose snake Leioheterodon madagascariensis 12.马达加斯加巨型猪鼻蛇Leioheterodon madagascariensis雄性打斗的首次记录

Herpetological Bulletin Pub Date : 2022-12-01 DOI: 10.33256/hb162.3536

Samuel Betts, J. Mawer

{"title":"12. First record of male-male combat in the Malagasy giant hognose snake Leioheterodon madagascariensis","authors":"Samuel Betts, J. Mawer","doi":"10.33256/hb162.3536","DOIUrl":"https://doi.org/10.33256/hb162.3536","url":null,"abstract":"in snakes and is considered to be an ancestral characteristic of the group (Senter et al., 2014). Rival males engage in combat in order to gain mating dominance or access to fertile females. Combat is generally non-lethal and combatants attempt to force the head of their competitor to the ground, often by entwining their bodies to exert a downward pressing force, known as topping. Herein we present the first known recorded observation of male combat in Leioheterodon madagascariensis, a Malagasy endemic now also found on the Comoros Islands (Meirte, 1993). It is a large and common lamprophiid species that may reach lengths of 1800 mm and is frequently encountered close to human habitation where it eats rats and eggs (Glaw & Vences, 2007). The species has an upturned rostral scale, which is referred to in the common name, that is used for foraging under leaf litter and sand (Glaw & Vences, 2007). Previously, the only reproductive behaviour described for L. madagascariensis has been courtship and mating between a captive male and female (Campbell & Murphy, 1977). On 24 July 2019 at 11:28 h during a herpetofaunal survey in the north-west dry forests of the Mahamavo region of Madagascar (15° 28’30.7” S, 46° 41’43.4” E), two large adult male L. madagascariensis were observed engaged in combat (BHS video, 2022). The two males were found mid combat on a frequently used village path, with both snakes seemingly undisturbed by the presence of the two authors despite being only metres away. Their body and tail regions were entwined, and heads elevated (Fig. 1A). Both snakes attempted to pin the head of the other, whilst continuously coiling around each other without much forward travel. An individual would attempt to pin the head of the other to the ground with the underside of its own head, whilst the other would jerk its head to one side in an effort to not be pinned and to try to regain dominance. Combat was observed for approximately 8 minutes and the position of dominance switched repeatedly. Whilst combat in other species sometimes involves multiple phases (Guedes et al., 2019; Senter et al., 2014), combat in L. madagascariensis only seemed to have a ‘topping’ phase, but it must be noted that combat was not observed from the start. No biting was observed. When combat was completed, the victor flared and raised its neck in a manner often exhibited in L. madagascariensis’ defensive behaviour (Fig. 1B) and appeared to chase off the loser, which moved off the path into the undergrowth, shortly followed by the victor. We did not observe a female, however, a passing villager claimed to have seen another snake, which we assumed to be the female. The victor was later caught and biometric data recorded. The snake was the largest L. madagascariensis caught during the survey season (1500 mm long and weighing 1200 g); its large size may have played a role in victory (Glaudas et al., 2020; Schuett, 1997). Whilst handled, the snake convulsed its cloacal region, seem","PeriodicalId":35972,"journal":{"name":"Herpetological Bulletin","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47790220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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01. Annual spawn clump losses in a population of the agile frog Rana dalmatina in western France 01. 在法国西部，敏捷的斑点蛙种群每年的卵群损失

Herpetological Bulletin Pub Date : 2022-12-01 DOI: 10.33256/hb162.14

Meek Roger

{"title":"01. Annual spawn clump losses in a population of the agile frog Rana dalmatina in western France","authors":"Meek Roger","doi":"10.33256/hb162.14","DOIUrl":"https://doi.org/10.33256/hb162.14","url":null,"abstract":"The agile frog Rana dalmatina is a common and frequently studied species in Europe including long-term studies of population change. Several have employed spawn clump counts to give estimates of annual presence of reproductive females. Spawn clumps are also subject to predation but little is known of the extent of losses but it could impact population densities significantly. The objective of the present study was to assess the extent of spawn clump losses due to predation in a population of R. dalmatina in western France using data from numbers of spawn clumps recorded over a four-year period (2019–2022). Spawn counts were greatest during 2019 but numbers declined with a zero count in 2022. Predation was greatest in 2021, the year total counts were lowest, but there were no statistical difference between annual losses, which varied from 22.9–41.6 %. Most spawn was deposited in a series of ditches rather than in the two available ponds but statistically predation levels were in agreement, with ditches ranging from 26.1–40 % versus ponds 28.6–40 %. Observed predators were ducks and alien crayfish Procambarus clarkii. The latter consumes all stages of frog development and hence likely represents the greater threat, especially since it has the capacity for population increase to very high numbers.","PeriodicalId":35972,"journal":{"name":"Herpetological Bulletin","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48525343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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06. New record of the green vine snake Oxybelis fulgidus in the Cerrado of Mato Grosso, central Brazil: A significant shift from forest to savannah? 06.巴西中部马托格罗索塞拉多的绿藤蛇Oxybelis fulgidus的新记录：从森林到稀树草原的重大转变？

Herpetological Bulletin Pub Date : 2022-12-01 DOI: 10.33256/hb162.2122

Arthur de Sena, F. Corrêa, F. M. Quintela

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08. Dark gaping - presumed independent origin for a remarkable warning signal in four Neotropical snake species 08. 暗口——假定是四种新热带蛇类中一个显著的警告信号的独立起源

Herpetological Bulletin Pub Date : 2022-12-01 DOI: 10.33256/hb162.2629

O. A. Marques, I. Sazima

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16. Panther chameleons Furcifer pardalis using aerial cables in urban habitats 16. 黑豹变色龙在城市栖息地使用架空电缆

Herpetological Bulletin Pub Date : 2022-12-01 DOI: 10.33256/hb162.4344

Grégory Deso, X. Bonnet, M. Roesch, Dylan Lauret, Jean‐Michel Probst, Xavier Porcel, J. Renet, Nicolas Dubos

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pdf 15. J.G. Schneider’s Historiae Amphibiorum: Herpetology at the Dawn of the 19th Century pdf 15。施奈德的两栖动物史：19世纪初的爬虫学

Herpetological Bulletin Pub Date : 2022-09-01 DOI: 10.33256/hb161.4748

R. Downie

引用次数: 1

01. Evaluation of cloacoscopy for sex determination in the Argentine black and white tegu Salvator merianae 01.结肠镜检查对阿根廷黑白鱼性别决定的评估

Herpetological Bulletin Pub Date : 2022-09-01 DOI: 10.33256/hb161.14

F. Spadola

引用次数: 1

10. Effect of hypoxia on the embryonic and larval development of the Nagaland montane torrent toad Duttaphrynus chandai in India 10. 低氧对印度那加兰邦山洪蟾蜍胚胎和幼虫发育的影响

Herpetological Bulletin Pub Date : 2022-09-01 DOI: 10.33256/hb161.3739

Lal Muansanga

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06. Diet of the recently introduced white-lipped frog Leptodactylus fragilis from a suburban ecosystem in western Cuba 06.最近从古巴西部郊区生态系统引进的白唇蛙瘦趾蛙的饮食

Herpetological Bulletin Pub Date : 2022-09-01 DOI: 10.33256/hb161.2427

L. García-Padrón

{"title":"06. Diet of the recently introduced white-lipped frog Leptodactylus fragilis from a suburban ecosystem in western Cuba","authors":"L. García-Padrón","doi":"10.33256/hb161.2427","DOIUrl":"https://doi.org/10.33256/hb161.2427","url":null,"abstract":"ABSTRACT - Diet and trophic interactions are essential for understanding aspects of the natural history of a species and evaluating its role within the ecosystem. A successful coloniser often has the ability to exploit a wide variety of prey during its establishment and may generate negative impacts due to competition with the local fauna. During both the dry and rainy seasons of 2019, in a suburban ecosystem in western Cuba, we analysed the diet of the recently introduced white-lipped frog Leptodactylus fragilis. Captured frogs were measured and stomach-flushed and released 24 h after analysis at the site of capture. Ninety-one L. fragilis were captured, 73 of them (80.2 %) had prey in the stomach. The most consumed prey were beetles, followed by spiders, and crickets. No difference was observed in prey consumption between seasons. This frog may change its foraging strategy according to the habitat it occupies. In this study, we observed high values of food niche breadth, which may imply a greater competition of L. fragilis for food resources with the native syntopic anurans in Cuba. Studies on temporal and spatial dynamics are needed to understand the possible competitive interaction with native amphibians in this area.","PeriodicalId":35972,"journal":{"name":"Herpetological Bulletin","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41866457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0