South American Journal of Herpetology最新文献_第10页

Seasonal Reproductive Dynamics of a Lek-Breeding Neotropical Treefrog is not Organized by Male Size (Anura, Hylidae) Lek繁殖的季节性繁殖动态新热带Treefrog不是由雄性大小组织的（Anura，Hylidae）

IF 0.9 4区生物学

South American Journal of Herpetology Pub Date : 2020-10-26 DOI: 10.2994/SAJH-D-17-00111.1

Caio Carneiro Leão Pompeu, Fábio P. de Sá, C. Haddad

{"title":"Seasonal Reproductive Dynamics of a Lek-Breeding Neotropical Treefrog is not Organized by Male Size (Anura, Hylidae)","authors":"Caio Carneiro Leão Pompeu, Fábio P. de Sá, C. Haddad","doi":"10.2994/SAJH-D-17-00111.1","DOIUrl":"https://doi.org/10.2994/SAJH-D-17-00111.1","url":null,"abstract":"Abstract. Social structure in anurans is directly related to reproductive traits such as chorus organization, male territoriality, pair formation, breeding site choice, and temporal breeding pattern. The Neotropical treefrog Dendropsophus sanborni is an excellent model for studies on reproductive dynamics because it is a prolonged-breeder and usually occurs in high densities. Here, our goals were to better understand the factors that lead to social organization and influence seasonal reproductive dynamics of males of the species. We addressed the hypotheses that (1) the seasonal dynamics of D. sanborni is locally delimited by climatic conditions throughout its breeding season and (2) territorial males are structured spatially and temporally based on body size. We carried out monthly field sampling between October 2015 and September 2016 in an ecotone region of Brazil that originally comprised Semideciduous Seasonal Forest and Cerrado (savannah vegetation). We specifically analyzed environmental conditions, population abundance, size of calling males, and microhabitat use. Our results showed that environmental conditions drive the seasonal reproductive pattern and social structure of calling males is not organized by size. We did not find significant variation in male size among months of the breeding season or among perch heights and types. Our findings suggest a prolonged seasonal reproductive pattern associated with climatic factors without a social structure based on body size.","PeriodicalId":48691,"journal":{"name":"South American Journal of Herpetology","volume":"18 1","pages":"33 - 41"},"PeriodicalIF":0.9,"publicationDate":"2020-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41592267","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: 2

Description and Phylogeny of a New Species of Andean Lizard (Gymnophthalmidae: Cercosaurinae) from the Huancabamba Depression 欢卡班巴凹陷安第斯蜥蜴一新种的描述与系统发育

IF 0.9 4区生物学

South American Journal of Herpetology Pub Date : 2020-09-15 DOI: 10.2994/SAJH-D-18-00069.1

Omar Torres‐Carvajal, P. Venegas, Pedro M. Sales Nunes

引用次数: 4

Does a Defensive Pseudoautotomy Mechanism Exist in the Subfamily Xenodontinae? A Study of the Genus Echinanthera 棘齿亚科存在防御性假自切机制吗?标题刺花属植物的研究

IF 0.9 4区生物学

South American Journal of Herpetology Pub Date : 2020-09-01 DOI: 10.2994/SAJH-D-17-00058.1

A. D. Abegg, C. Gomes, O. M. Entiauspe-Neto, Paulo Passos

{"title":"Does a Defensive Pseudoautotomy Mechanism Exist in the Subfamily Xenodontinae? A Study of the Genus Echinanthera","authors":"A. D. Abegg, C. Gomes, O. M. Entiauspe-Neto, Paulo Passos","doi":"10.2994/SAJH-D-17-00058.1","DOIUrl":"https://doi.org/10.2994/SAJH-D-17-00058.1","url":null,"abstract":"Abstract. Pseudoautotomy is presumably a derived character within Lepidosauria and occurs in taxa that have lost the ability to perform autotomy. In general, species capable of employing pseudoautotomy as a defensive strategy against predators present a high frequency of damaged tails in series deposited in herpetological collections. We assessed data from three largely sympatric Echinanthera species in the Brazilian Atlantic Rainforest (E. cephalostriata, E. cyanopleura, and E. undulata) to test previous assumptions that species of Echinanthera use their tails defensively. This hypothesis derives from anecdotal observations during fieldwork and is reinforced by the number of specimens presenting tail breakage in scientific collections. In general, the frequency of damaged tails in these species resembles that of others in which pseudoautotomy has been demonstrated. Statistical analyses revealed no differences in tail breakage frequencies between sexes for the analyzed species or between the two geographical groups defined for E. cyanopleura. In contrast, we detected a significant difference between snout–vent length and sex regarding pseudoautotomy probability for E. cyanopleura, with a positive relationship between tail breakage frequency and snout–vent length.","PeriodicalId":48691,"journal":{"name":"South American Journal of Herpetology","volume":"18 1","pages":"24 - 32"},"PeriodicalIF":0.9,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47271041","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

Tick Infection of Caiman crocodilus fuscus at the Hidroprado Hydroelectric Dam in Colombia: New Records, Parasite Prevalence, and Blood Loss Rate 哥伦比亚Hidroprado水电站凯门鳄的蜱虫感染:新记录、寄生虫流行率和失血率

IF 0.9 4区生物学

South American Journal of Herpetology Pub Date : 2020-08-31 DOI: 10.2994/SAJH-D-18-00080.1

Cristina Mora-Rivera, Fernando Suarez-Páez, G. Pacheco-Sierra, Laura Vargas-Cuevas, Mónica Padilla-Barreto

{"title":"Tick Infection of Caiman crocodilus fuscus at the Hidroprado Hydroelectric Dam in Colombia: New Records, Parasite Prevalence, and Blood Loss Rate","authors":"Cristina Mora-Rivera, Fernando Suarez-Páez, G. Pacheco-Sierra, Laura Vargas-Cuevas, Mónica Padilla-Barreto","doi":"10.2994/SAJH-D-18-00080.1","DOIUrl":"https://doi.org/10.2994/SAJH-D-18-00080.1","url":null,"abstract":"Abstract. The main goal of this research was to identify the hard ticks (Acari: Ixodidae) found in 10 individuals of spectacled caiman (Caiman crocodilus fuscus) from 349 individuals captured at the Hidroprado hydroelectric dam in the Department of Tolima, Colombia. Parasite prevalence was 2.9%. A total of 40 ticks were collected and two species identified: Amblyomma dissimile (n = 39) and Rhipicephalus sanguineus (n = 1). This is the second record of A. dissimile in C. crocodilus in Colombia and the first record of R. sanguineus in crocodilians. The natural infection of C. c. fuscus by A. dissimile establishes this species as a host in the life cycle of this tick. Similarly, parasitism by R. sanguineus indicates C. c. fuscus as a potential host for this tick, which is important since it is associated with domestic animals and has a high potential for transmission of zoonotic diseases. Our results highlight the parasitic relationship between ticks and one of the most resistant wild vertebrates: caimans. The prevalence, although not high, establishes the potential of ticks to parasitize different species and to be a vector of diseases for new groups of hosts.","PeriodicalId":48691,"journal":{"name":"South American Journal of Herpetology","volume":"16 1","pages":"42 - 49"},"PeriodicalIF":0.9,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48344111","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: 3

Retreat Sites Shared by Two Liolaemus Lizard Species: Exploring the Potential Role of Scents 两种Liolaemus蜥蜴共享的撤退地点:探索气味的潜在作用

IF 0.9 4区生物学

South American Journal of Herpetology Pub Date : 2020-08-31 DOI: 10.2994/SAJH-D-18-00051.1

M. R. Ruiz-Monachesi, S. Valdecantos, F. Lobo, F. B. Cruz, Antonieta Labra

{"title":"Retreat Sites Shared by Two Liolaemus Lizard Species: Exploring the Potential Role of Scents","authors":"M. R. Ruiz-Monachesi, S. Valdecantos, F. Lobo, F. B. Cruz, Antonieta Labra","doi":"10.2994/SAJH-D-18-00051.1","DOIUrl":"https://doi.org/10.2994/SAJH-D-18-00051.1","url":null,"abstract":"Abstract. Some lizard species modulate the use of a retreat site based on the presence of scents from other individuals, behavior that requires scent recognition. Here, we investigated if two congeneric and syntopic lizards (adults of Liolaemus coeruleus and juveniles of L. ceii, which can be found sharing retreat sites in the wild) discriminate scents from each other during the pre-hibernation period. If the presence of heterospecific scents modulates sharing retreat sites, species would discriminate each other's scents. Lizards were individually exposed to four treatments, which were enclosures with scents of (1) from the focal individual (own); (2) a conspecific of the same sex as the focal lizard; (3) a heterospecific of the same sex as the focal lizard; and (4) a control (i.e., enclosure with a clean substrate). Our results suggest that there is no heterospecific recognition. This finding was not due to an inability to chemo-assess scents, since both species exhibited self-recognition (recognition of their own scents) and juveniles of L. ceii also showed conspecific recognition. Although it might be advantageous for species to share retreat sites, chemical recognition of heterospecific scents does not modulate this behavior in these syntopic species.","PeriodicalId":48691,"journal":{"name":"South American Journal of Herpetology","volume":"17 1","pages":"79 - 86"},"PeriodicalIF":0.9,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69931787","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

Acoustic Repertoire and Calling Behavior of the Gliding Treefrog, Agalychnis spurrelli (Anura: Hylidae) 滑翔树的声汇和鸣叫行为

IF 0.9 4区生物学

South American Journal of Herpetology Pub Date : 2020-08-31 DOI: 10.2994/SAJH-D-18-00040.1

Ricardo Cossio, Eduardo Medina-Barcenas

{"title":"Acoustic Repertoire and Calling Behavior of the Gliding Treefrog, Agalychnis spurrelli (Anura: Hylidae)","authors":"Ricardo Cossio, Eduardo Medina-Barcenas","doi":"10.2994/SAJH-D-18-00040.1","DOIUrl":"https://doi.org/10.2994/SAJH-D-18-00040.1","url":null,"abstract":"Abstract. Acoustic communication is essential for reproductive success in frogs. Males produce different types of calls to attract females, advertise territoriality or location in a chorus, or communicate with heterospecifics. Quantitative descriptions of amphibian calls provide basic information for taxonomic, ecological, evolutionary, and conservation studies. Here, we describe the acoustic repertoire of Agalychnis spurrelli and discuss this species' reproductive behavior on the basis of observations made over the course of a breeding season in May–December 2007. Males produced one type of advertisement call and two types of aggressive calls (calls A and B) that differed in temporal and spectral frequency. The advertisement call was a single note. Aggressive call A was a long-pulsed single note, and call B was composed of more than two notes per call. Calling behavior was influenced by chorus size and male-to-male proximity, with males altering their advertisement calls with the increase of chorus size and eventually producing aggressive calls. These results suggest that A. spurrelli might exhibit graded aggressive signaling, helping males to delimit their calling site and reducing the number of agonistic encounters.","PeriodicalId":48691,"journal":{"name":"South American Journal of Herpetology","volume":"17 1","pages":"71 - 78"},"PeriodicalIF":0.9,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43533218","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: 2

Sexual Identification of Caiman latirostris Hatchlings by Cloacal Inspection 用阴沟检查法鉴定Caiman latirostris孵化后代的性别

IF 0.9 4区生物学

South American Journal of Herpetology Pub Date : 2020-08-31 DOI: 10.2994/SAJH-D-18-00075.1

Hernán Ciocan, P. M. Leiva, M. Simoncini

{"title":"Sexual Identification of Caiman latirostris Hatchlings by Cloacal Inspection","authors":"Hernán Ciocan, P. M. Leiva, M. Simoncini","doi":"10.2994/SAJH-D-18-00075.1","DOIUrl":"https://doi.org/10.2994/SAJH-D-18-00075.1","url":null,"abstract":"Abstract. Sexual identification of crocodilians is important in population studies and provides useful information for conservation and management plans and monitoring populations over time. It is possible to distinguish between male and female Caiman latirostris by cloacal palpation or eversion of the penis in individuals larger than 75 cm total length, but smaller animals possess a barely differentiable cliteropenis. In hatchlings, sex determination methods involve surgical examination, necropsy, or analysis of cranial dimorphism, which cannot be applied in the field. We classified hatchlings of C. latirostris by observing the color and shape of their genitals. The penis is a milky white organ with a rounded shape at the tip and a purple hue at the end, whereas the clitoris is shorter, whitish, and has a pointed end. The procedure was tested on hatchlings from three nests at the “Proyecto Yacaré” study area (Santa Fe province); half of the eggs of each nest were incubated at a constant temperature of 31°C (producing females) and the other half at 33°C (producing males). To observe the sexual organs by cloacal inspection, we used a modified instrument whose function during palpation is like that of a finger applied in large animals to evert the penis or clitoris. In the first days after hatching we correctly scored the sex of 80% of the individuals. The number of correct identifications was slightly lower for males than for females. This technique might be a useful tool for field studies, as it allows the sex of small caimans to be estimated in situ.","PeriodicalId":48691,"journal":{"name":"South American Journal of Herpetology","volume":"16 1","pages":"50 - 55"},"PeriodicalIF":0.9,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41957794","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: 4

Analysis of the Interactions Between Humans and Crocodiles in Costa Rica 哥斯达黎加人与鳄鱼的相互作用分析

IF 0.9 4区生物学

South American Journal of Herpetology Pub Date : 2020-08-27 DOI: 10.2994/SAJH-D-18-00076.1

Laura Patricia Porras Murillo, Erick Mata Cambronero

{"title":"Analysis of the Interactions Between Humans and Crocodiles in Costa Rica","authors":"Laura Patricia Porras Murillo, Erick Mata Cambronero","doi":"10.2994/SAJH-D-18-00076.1","DOIUrl":"https://doi.org/10.2994/SAJH-D-18-00076.1","url":null,"abstract":"Abstract. The habitat of crocodiles (Crocodylus acutus) and caimans (Caiman crocodilus) has been subjected to pressure due to human expansion. Habitat reduction, coupled with the simultaneous growth of the crocodile population, increases the number of interactions between crocodiles and humans. There is currently no official and systematized interactions database, but it is necessary to know the magnitude and nature of the interactions and establish management measures. The objective of the work was to systematize and evaluate the interactions between crocodiles and humans in Costa Rica. Historical information was collected from several sources. A total of 99 records, dated between 1990–2017, were found from press reports and the Integrated System for Processing Environmental Complaints of the Ministry of Environment and Energy (SITADA). The Fire Department recorded 123 events in 2017. All Fire Department records corresponded to encounters or sightings. Of the SITADA incident records, 35.4% were non-fatal, 27.3% were fatal, 21.2% were encounters and sightings, and the remaining 16.1% were miscellaneous situations. Most interactions occurred during the day, a fact potentially explained by human behavior of being in bodies of water or on adjacent shoreline while the sun is out. Most interactions occurred in the Central Pacific, followed by the Caribbean and then the South Pacific. The information available is brief but allows to establish management measures. The country needs to create a national database of interactions and to encourage individuals to report their interactions. Further research should continue to analyze the data for trends with the goal of building recommendations to prevent an increase in negative interactions.","PeriodicalId":48691,"journal":{"name":"South American Journal of Herpetology","volume":"16 1","pages":"26 - 33"},"PeriodicalIF":0.9,"publicationDate":"2020-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48849782","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: 6

Growth Curves of Wild and Reintroduced Broad-Snouted Caimans (Caiman latirostris) and Their Management Implications 野生和重新引种的宽吻凯门鳄的生长曲线及其管理意义

IF 0.9 4区生物学

South American Journal of Herpetology Pub Date : 2020-08-27 DOI: 10.2994/SAJH-D-18-00077.1

Evangelina V. Viotto, J. L. Navarro, C. Piña

{"title":"Growth Curves of Wild and Reintroduced Broad-Snouted Caimans (Caiman latirostris) and Their Management Implications","authors":"Evangelina V. Viotto, J. L. Navarro, C. Piña","doi":"10.2994/SAJH-D-18-00077.1","DOIUrl":"https://doi.org/10.2994/SAJH-D-18-00077.1","url":null,"abstract":"Abstract. We describe body growth functions of broad-snouted caimans (Caiman latirostris) for wild and reintroduced individuals. Snout–vent length (SVL, cm) and age of young individuals and adult females were recorded for two different groups: (Py) animals born in the Proyecto Yacaré ranching program, from eggs collected in the wild; and (Wy) wild caimans Class I (< 25 cm SVL) whose age was determined by Size Frequency Analysis, plus females reintroduced by the Proyecto Yacaré and subsequently recaptured at reproductive age. To describe body growth, we adjusted five models through non-linear regression: Logistic, 4-Parameter Logistic (4-PL), Gompertz, 4-Parameter Gompertz (4-G), and von Bertalanffy. Each group was analyzed separately (Py and Wy), and we selected the most parsimonious model based on the Akaike criterion. We also analyzed the possible linear growth difference using ANCOVA. For Py, the Logistic model was best, whereas for Wy the most suitable was 4-PL, in which wild animals would arrive at the inflexion point 1.4 years later on average than in Py. Analyzing the stage at which their development was linear in shape, we detected that the wild animals had a similar growth rate to reintroduced individuals. As a result, although Py animals had experienced accelerated development whilst in captivity, it did not modify their subsequent growth in the wild. The likelihood of survival in this species increases with body size, thus it is important to emphasize that reintroduced animals are larger than wild animals of the same age and that previous farming conditions seem not to affect their growth in the wild. Therefore, we expect that reintroduced caimans will exhibit greater survivorship than natural animals of the same age. Consequently, an adjustment of the current ranching program should be considered, in the sense that population viability could be achieved by reintroducing a lower number of caimans each season.","PeriodicalId":48691,"journal":{"name":"South American Journal of Herpetology","volume":"16 1","pages":"34 - 41"},"PeriodicalIF":0.9,"publicationDate":"2020-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42886974","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: 5

Diet and Trophic Niche of Two Sympatric Physalaemus Species in Central Brazil 巴西中部两种同域海绵鼠的食性和营养生态位

IF 0.9 4区生物学

South American Journal of Herpetology Pub Date : 2020-08-25 DOI: 10.2994/SAJH-D-17-00100.1

P. Gambale, Marlene Rodrigues da Silva, F. H. Oda, R. Bastos

引用次数: 1