Pub Date : 2024-08-09DOI: 10.1163/15685381-bja10188
Giacomo Rosa, Andrea Costa, S. Salvidio
Boldness is a personality trait defined as the propensity of an animal to engage in risk-taking behaviours. Boldness is often associated with social ranking, dispersal, movement, and home range in many animal species. In this study we tested if boldness was correlated with individual spatial behaviour, in a population of the Cave Salamander Speleomantes strinatii living in a subterranean habitat. Boldness was measured in a controlled environment by means of an emerging from a shelter trial, while home ranges and distances moved over two years were obtained in the wild from a spatially explicit capture-mark-recapture study. We obtained data from 13 salamanders that were captured at least 5 times (mean 7.23; range 5-11). As expected, there was a highly significant and negative correlation between individual risk taking behaviour and home range overlap with conspecifics (rs = 0.84; p = 0.005). This pattern could be explained by differences in habitat physical quality or in its available resources, but more research is needed to better understand this behavioural pattern.
{"title":"Risk-taking salamanders share less space with conspecifics","authors":"Giacomo Rosa, Andrea Costa, S. Salvidio","doi":"10.1163/15685381-bja10188","DOIUrl":"https://doi.org/10.1163/15685381-bja10188","url":null,"abstract":"\u0000Boldness is a personality trait defined as the propensity of an animal to engage in risk-taking behaviours. Boldness is often associated with social ranking, dispersal, movement, and home range in many animal species. In this study we tested if boldness was correlated with individual spatial behaviour, in a population of the Cave Salamander Speleomantes strinatii living in a subterranean habitat. Boldness was measured in a controlled environment by means of an emerging from a shelter trial, while home ranges and distances moved over two years were obtained in the wild from a spatially explicit capture-mark-recapture study. We obtained data from 13 salamanders that were captured at least 5 times (mean 7.23; range 5-11). As expected, there was a highly significant and negative correlation between individual risk taking behaviour and home range overlap with conspecifics (rs = 0.84; p = 0.005). This pattern could be explained by differences in habitat physical quality or in its available resources, but more research is needed to better understand this behavioural pattern.","PeriodicalId":50799,"journal":{"name":"Amphibia-Reptilia","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141923318","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}
Pub Date : 2024-08-09DOI: 10.1163/15685381-bja10192
Filipe Gomes de Almeida, François Ciavatti, Angélica Pulido, Thomas Gendre, P. Geniez, Aimeric Eble, Elise Leblanc, Yoann Mansier, Ivain Martinossi-Allibert, Blaise Raymond, Adrien Pineau, Jérémie Demay, P. Crochet
The Pelophylax genus comprises two main hybridogenetic systems resulting from hybridization between Pelophylax ridibundus and other species: the P. lessonae-esculentus (LE) system and the P. perezi-grafi (PG) system, whose distribution ranges lie partly (LE) or entirely (PG) outside the natural distribution of P. ridibundus. The introductions and subsequent expansions of P. ridibundus in many areas naturally inhabited by these hybridogenetic systems have led to their decrease or local extinction. One of the major impediments to efficient population surveys and conservation measures for these systems is the difficulties of reliable species identification due to their similar morphology and poorly documented vocalizations, especially for the PG system. Our aim in this work was to design a reliable method of acoustic identification to distinguish the taxa composing the hybridogenetic systems from P. ridibundus and to assess the possibility of separating the PG and LE systems by their vocalizations. Our acoustic identification methods proved highly accurate to separate the PG and LE systems from P. ridibundus but only a fraction of the PG and LE calls can be identified.
Pelophylax 属包括两个由 Pelophylax ridibundus 与其他物种杂交产生的主要杂交系统：P. lessonae-esculentus（LE）系统和 P. perezi-grafi（PG）系统，其分布范围部分（LE）或全部（PG）位于 P. ridibundus 的自然分布区之外。在这些杂交系统自然栖息的许多地区，P. ridibundus 的引入和随后的扩展导致其减少或局部灭绝。对这些系统进行有效的种群调查和采取保护措施的主要障碍之一是，由于它们形态相似且发声记录较少，很难进行可靠的物种鉴定，尤其是对 PG 系统。我们这项工作的目的是设计一种可靠的声学识别方法，以区分构成杂交系统的类群与 P. ridibundus，并评估通过发声区分 PG 和 LE 系统的可能性。事实证明，我们的声学识别方法能非常准确地将 PG 和 LE 系统与 P. ridibundus 区分开来，但只有一部分 PG 和 LE 的叫声能被识别出来。
{"title":"Acoustics of parental and hybridogenetic water frogs (Pelophylax: Amphibia: Ranidae): a tool for monitoring an invasive species","authors":"Filipe Gomes de Almeida, François Ciavatti, Angélica Pulido, Thomas Gendre, P. Geniez, Aimeric Eble, Elise Leblanc, Yoann Mansier, Ivain Martinossi-Allibert, Blaise Raymond, Adrien Pineau, Jérémie Demay, P. Crochet","doi":"10.1163/15685381-bja10192","DOIUrl":"https://doi.org/10.1163/15685381-bja10192","url":null,"abstract":"\u0000The Pelophylax genus comprises two main hybridogenetic systems resulting from hybridization between Pelophylax ridibundus and other species: the P. lessonae-esculentus (LE) system and the P. perezi-grafi (PG) system, whose distribution ranges lie partly (LE) or entirely (PG) outside the natural distribution of P. ridibundus. The introductions and subsequent expansions of P. ridibundus in many areas naturally inhabited by these hybridogenetic systems have led to their decrease or local extinction. One of the major impediments to efficient population surveys and conservation measures for these systems is the difficulties of reliable species identification due to their similar morphology and poorly documented vocalizations, especially for the PG system. Our aim in this work was to design a reliable method of acoustic identification to distinguish the taxa composing the hybridogenetic systems from P. ridibundus and to assess the possibility of separating the PG and LE systems by their vocalizations. Our acoustic identification methods proved highly accurate to separate the PG and LE systems from P. ridibundus but only a fraction of the PG and LE calls can be identified.","PeriodicalId":50799,"journal":{"name":"Amphibia-Reptilia","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141924587","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}
Pub Date : 2024-08-09DOI: 10.1163/15685381-bja10190
Ricardo Figueroa-Huitrón, Elia Fernanda Díaz-Martínez, Fausto Roberto Méndez de la Cruz, H. A. Pérez-Mendoza
Temperature is closely linked to the various lifestyles of reptiles, considerably influencing many aspects of their behaviour. Species with contrasting foraging modes or associated with different microhabitats are expected to thermoregulate in distinct ways. We sought to describe the thermal ecology of three model snake species, highlighting how their distinct lifestyles account for variation in thermoregulatory strategies. We chose the fossorial Conopsis lineata, the terrestrial Crotalus polystictus, and the semi-aquatic Thamnophis melanogaster. Following the protocol proposed by Hertz et al. (1993), we gathered data on body and operative temperatures in the field and preferred temperatures () in the laboratory. The three species exhibited a wide range of , with differences between lower and upper limits ranging from 6.4°C to 8°C. The E index of effectiveness of thermoregulation was 0.685 for C. polystictus, 0.644 for C. lineata, and 0.486 for T. melanogaster. These results indicate that C. lineata and C. polystictus are precise and active thermoregulators. C. lineata has cryptic and fossorial habits, and we propose that its efficient thermoregulation likely results from the strategic selection of thermally favourable retreat sites. Contrary to what we predicted, T. melanogaster turned out to be the least accurate thermoregulator. Its semiaquatic lifestyle can help it to maintain beneficial body temperatures with less effort since aquatic environments are more thermally homogeneous. Overall, our study shows that lifestyle affects thermoregulation to an extent in these species, but that the thermal environments they inhabit also plays a key role in delimiting their thermoregulatory strategies.
{"title":"Thermoregulation and activity patterns of three species of snakes with different lifestyles in central Mexico","authors":"Ricardo Figueroa-Huitrón, Elia Fernanda Díaz-Martínez, Fausto Roberto Méndez de la Cruz, H. A. Pérez-Mendoza","doi":"10.1163/15685381-bja10190","DOIUrl":"https://doi.org/10.1163/15685381-bja10190","url":null,"abstract":"\u0000Temperature is closely linked to the various lifestyles of reptiles, considerably influencing many aspects of their behaviour. Species with contrasting foraging modes or associated with different microhabitats are expected to thermoregulate in distinct ways. We sought to describe the thermal ecology of three model snake species, highlighting how their distinct lifestyles account for variation in thermoregulatory strategies. We chose the fossorial Conopsis lineata, the terrestrial Crotalus polystictus, and the semi-aquatic Thamnophis melanogaster. Following the protocol proposed by Hertz et al. (1993), we gathered data on body and operative temperatures in the field and preferred temperatures () in the laboratory. The three species exhibited a wide range of , with differences between lower and upper limits ranging from 6.4°C to 8°C. The E index of effectiveness of thermoregulation was 0.685 for C. polystictus, 0.644 for C. lineata, and 0.486 for T. melanogaster. These results indicate that C. lineata and C. polystictus are precise and active thermoregulators. C. lineata has cryptic and fossorial habits, and we propose that its efficient thermoregulation likely results from the strategic selection of thermally favourable retreat sites. Contrary to what we predicted, T. melanogaster turned out to be the least accurate thermoregulator. Its semiaquatic lifestyle can help it to maintain beneficial body temperatures with less effort since aquatic environments are more thermally homogeneous. Overall, our study shows that lifestyle affects thermoregulation to an extent in these species, but that the thermal environments they inhabit also plays a key role in delimiting their thermoregulatory strategies.","PeriodicalId":50799,"journal":{"name":"Amphibia-Reptilia","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141924279","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}
Pub Date : 2024-06-12DOI: 10.1163/15685381-bja10183
David Laorden-Romero, Carlos Caballero-Díaz, G. Sánchez‐Montes, Johanna Ambu, C. Dufresnes, Í. Martínez‐Solano
The plant-trade is among the main sources of accidental introduction of alien biodiversity. This includes amphibians, although effective colonization pathways have rarely been reported except from tropical areas. We document the discovery of an established breeding population of the Catalonian midwife toad, Alytes almogavarii almogavarii Arntzen and García-París, 1995, in a plant nursery in Madrid (Central Spain), 400 km away from its natural distribution. During surveys in 2023 we found adults, juveniles, and tadpoles, confirming reproduction. We used mtDNA sequences to genotype six individuals for taxonomic assignment and tracing their putative origin. Two haplotypes were found, one of them showing a broad distribution, precluding precise identification of the source of the introduction. We discuss conservation concerns, including the potential spread of pathogens. Our results suggest unintentional amphibian introductions via the plant-trade may be more frequent than perceived, and call for rigorous monitoring and education efforts.
{"title":"Alien amphibian introductions via the plant trade: a breeding population of the Catalonian midwife toad (Alytes almogavarii) in Central Spain","authors":"David Laorden-Romero, Carlos Caballero-Díaz, G. Sánchez‐Montes, Johanna Ambu, C. Dufresnes, Í. Martínez‐Solano","doi":"10.1163/15685381-bja10183","DOIUrl":"https://doi.org/10.1163/15685381-bja10183","url":null,"abstract":"\u0000The plant-trade is among the main sources of accidental introduction of alien biodiversity. This includes amphibians, although effective colonization pathways have rarely been reported except from tropical areas. We document the discovery of an established breeding population of the Catalonian midwife toad, Alytes almogavarii almogavarii Arntzen and García-París, 1995, in a plant nursery in Madrid (Central Spain), 400 km away from its natural distribution. During surveys in 2023 we found adults, juveniles, and tadpoles, confirming reproduction. We used mtDNA sequences to genotype six individuals for taxonomic assignment and tracing their putative origin. Two haplotypes were found, one of them showing a broad distribution, precluding precise identification of the source of the introduction. We discuss conservation concerns, including the potential spread of pathogens. Our results suggest unintentional amphibian introductions via the plant-trade may be more frequent than perceived, and call for rigorous monitoring and education efforts.","PeriodicalId":50799,"journal":{"name":"Amphibia-Reptilia","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141355249","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}
Pub Date : 2024-03-25DOI: 10.1163/15685381-bja10172
Florian Laurence, Xavier Bonnet, Sylvain Ursenbacher, G. Guiller, Gopal Billy, G. Naulleau, Nicolas Vidal
Documenting intra-specific diet variations among remote populations, thus across different habitats, is important to address evolutionary (e.g., phenotypic plasticity) and conservation issues (e.g., capacity to adapt to changing prey availability). We compared the diet of different populations of Asp vipers (Vipera aspis aspis; Linnaeus, 1758) living in contrasted habitats of France and Switzerland. We sampled 1680 individuals in five geographical areas, broadly encompassing the distribution range of the species (West to East and North to South): Group 1 = Western Central France; Group 2 = Central France; Group 3 = West France; Group 4 = South France, and Group 5 = Switzerland. We compared mean total body size (TL) of snakes and their diet. We found strong similarities among the groups with a predominance of micromammals in the diet. In mountainous area (Group 5), however, snakes included a substantial number of reptiles and fed occasionally on amphibians and birds. The diet varied ontogenetically (juveniles often consuming lizards, adults heavily feeding on mammals) and sexually (females tending to feed more extensively on mammals). Overall, our results suggest that Asp vipers maintain a diet largely based on micromammals (mostly voles), at least across their continental distribution range.
{"title":"Diet variations across remote populations of a widely distributed snake species, the Asp viper (Vipera aspis aspis, Linnaeus, 1758)","authors":"Florian Laurence, Xavier Bonnet, Sylvain Ursenbacher, G. Guiller, Gopal Billy, G. Naulleau, Nicolas Vidal","doi":"10.1163/15685381-bja10172","DOIUrl":"https://doi.org/10.1163/15685381-bja10172","url":null,"abstract":"\u0000Documenting intra-specific diet variations among remote populations, thus across different habitats, is important to address evolutionary (e.g., phenotypic plasticity) and conservation issues (e.g., capacity to adapt to changing prey availability). We compared the diet of different populations of Asp vipers (Vipera aspis aspis; Linnaeus, 1758) living in contrasted habitats of France and Switzerland. We sampled 1680 individuals in five geographical areas, broadly encompassing the distribution range of the species (West to East and North to South): Group 1 = Western Central France; Group 2 = Central France; Group 3 = West France; Group 4 = South France, and Group 5 = Switzerland. We compared mean total body size (TL) of snakes and their diet. We found strong similarities among the groups with a predominance of micromammals in the diet. In mountainous area (Group 5), however, snakes included a substantial number of reptiles and fed occasionally on amphibians and birds. The diet varied ontogenetically (juveniles often consuming lizards, adults heavily feeding on mammals) and sexually (females tending to feed more extensively on mammals). Overall, our results suggest that Asp vipers maintain a diet largely based on micromammals (mostly voles), at least across their continental distribution range.","PeriodicalId":50799,"journal":{"name":"Amphibia-Reptilia","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140381989","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}
Pub Date : 2024-01-31DOI: 10.1163/15685381-bja10167
Venetia S Briggs-Gonzalez, Avishka Godahewa, S. Balaguera-Reina, Jeremy Dixon, Frank J. Mazzotti
The American crocodile (Crocodylus acutus) is the most widely distributed New World crocodile. However, the species has experienced severe declines due to overexploitation. In South Florida, loss of nesting habitat, with coastal degradation from sea level rise and urban development has prompted American crocodiles to nest in novel habitats. Crocodile Lake National Wildlife Refuge (CLNWR) serves as an important nesting site for the South Florida population of American crocodiles and more recently nesting habitat has been supplemented to manage coastal erosion. The goal of this study was to investigate the internal nest biology of American crocodile nests laid in sediment nourished sand mounds on CLNWR. We monitored internal nest temperature and volumetric water content of five live and two control sand nests in 2021 (N = 73 eggs) and 2022 (N = 84 eggs). The metabolic heat generated by incubating eggs in internal nest temperatures ranged from 0.8°C to 2.0°C warmer and more stable than ambient temperatures and reflecting a seasonal pattern. Average clutch size was 31.4 ± 7.09 eggs and incubation period ranged from 78 to 114 days until hatching. These data provide the first insight into thermal regimes of nests laid in novel/supplemented nesting habitat as is the case for a significant proportion of nests in the South Florida population of American crocodiles. Here we provide an opportunity to evaluate the importance of creating artificial nesting habitat for American crocodiles where habitat degradation from climate change threatens species survival.
{"title":"American crocodile nesting in sediment-nourished habitats on Crocodile Lake National Wildlife Refuge, Florida, USA","authors":"Venetia S Briggs-Gonzalez, Avishka Godahewa, S. Balaguera-Reina, Jeremy Dixon, Frank J. Mazzotti","doi":"10.1163/15685381-bja10167","DOIUrl":"https://doi.org/10.1163/15685381-bja10167","url":null,"abstract":"\u0000The American crocodile (Crocodylus acutus) is the most widely distributed New World crocodile. However, the species has experienced severe declines due to overexploitation. In South Florida, loss of nesting habitat, with coastal degradation from sea level rise and urban development has prompted American crocodiles to nest in novel habitats. Crocodile Lake National Wildlife Refuge (CLNWR) serves as an important nesting site for the South Florida population of American crocodiles and more recently nesting habitat has been supplemented to manage coastal erosion. The goal of this study was to investigate the internal nest biology of American crocodile nests laid in sediment nourished sand mounds on CLNWR. We monitored internal nest temperature and volumetric water content of five live and two control sand nests in 2021 (N = 73 eggs) and 2022 (N = 84 eggs). The metabolic heat generated by incubating eggs in internal nest temperatures ranged from 0.8°C to 2.0°C warmer and more stable than ambient temperatures and reflecting a seasonal pattern. Average clutch size was 31.4 ± 7.09 eggs and incubation period ranged from 78 to 114 days until hatching. These data provide the first insight into thermal regimes of nests laid in novel/supplemented nesting habitat as is the case for a significant proportion of nests in the South Florida population of American crocodiles. Here we provide an opportunity to evaluate the importance of creating artificial nesting habitat for American crocodiles where habitat degradation from climate change threatens species survival.","PeriodicalId":50799,"journal":{"name":"Amphibia-Reptilia","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140474939","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}
Pub Date : 2023-12-20DOI: 10.1163/15685381-bja10165
Annelise Swords, M. Cramberg, Seth Parker, Anchal Scott, Stephanie Sopko, Ethan Taylor, Bruce A Young
In tetrapedal locomotion, whether horizontal or during climbing, interactions between the foot and the contact surface or substrate influence the locomotor performance. Multiple previous studies of tetrapedal squamates (lizards) have reported that the animals used the same locomotor velocity, regardless of the angle of ascension. The present study was performed to determine if the American alligator (Alligator mississippiensis) would exhibit a stable climbing velocity and to determine to what degree, if any, this climbing velocity could be modified by substrate differences. Sub-adult Alligator mississippiensis, with body lengths around 170 cm, used the same stride velocity when moving at angles of 0°, 30°, and 55°. During these trials, both the sub-adult and juvenile alligators used a “low walk” gait, rather than a distinctive climbing gait. When the alligators traversed an open grate, their stride duration increased (and stride velocity decreased) presumably due to the insertion (and retraction) of their claws and digits into the grate. When climbing at 55° the juvenile and sub-adult alligators used the same stride duration; the sub-adults used a stride length that was significantly larger in absolute terms, but significantly shorter in relative terms. Despite their large size, and their more caudal center of mass, the climbing performance of Alligator mississippiensis is similar to what has been described in the previously-studied tetrapedal squamates.
{"title":"Alligatorascension: climbing performance of Alligator mississippiensis","authors":"Annelise Swords, M. Cramberg, Seth Parker, Anchal Scott, Stephanie Sopko, Ethan Taylor, Bruce A Young","doi":"10.1163/15685381-bja10165","DOIUrl":"https://doi.org/10.1163/15685381-bja10165","url":null,"abstract":"\u0000In tetrapedal locomotion, whether horizontal or during climbing, interactions between the foot and the contact surface or substrate influence the locomotor performance. Multiple previous studies of tetrapedal squamates (lizards) have reported that the animals used the same locomotor velocity, regardless of the angle of ascension. The present study was performed to determine if the American alligator (Alligator mississippiensis) would exhibit a stable climbing velocity and to determine to what degree, if any, this climbing velocity could be modified by substrate differences. Sub-adult Alligator mississippiensis, with body lengths around 170 cm, used the same stride velocity when moving at angles of 0°, 30°, and 55°. During these trials, both the sub-adult and juvenile alligators used a “low walk” gait, rather than a distinctive climbing gait. When the alligators traversed an open grate, their stride duration increased (and stride velocity decreased) presumably due to the insertion (and retraction) of their claws and digits into the grate. When climbing at 55° the juvenile and sub-adult alligators used the same stride duration; the sub-adults used a stride length that was significantly larger in absolute terms, but significantly shorter in relative terms. Despite their large size, and their more caudal center of mass, the climbing performance of Alligator mississippiensis is similar to what has been described in the previously-studied tetrapedal squamates.","PeriodicalId":50799,"journal":{"name":"Amphibia-Reptilia","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138954197","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}
Pub Date : 2023-12-15DOI: 10.1163/15685381-bja10164
Etienne Boncourt, Björn Reineking, Gabriel Chambonnet, Stéphanie Gaucherand
Movement is a key aspect of amphibian ecology as the life cycle of many species involves seasonal dispersal and migration. However, there is still a lack of knowledge about how amphibians move across landscapes in relation to landscape structure and resource availability. Modern lightweight GPS loggers and associated statistical tools offer new perspectives to fill this gap. We tracked the movements of 20 adult European common frogs (Rana temporaria) in a human-transformed mountain landscape during summer using GPS tags programmed with a constant 4-hour time interval between fixes. Using integrated step-selection analysis, we demonstrate firstly that frogs strongly selected aquatic habitats over open grassland. Second, ski runs have a negative effect on frogs, indicated by longer movement steps. Weather (air temperature and rain) had no effect on frog movements. These results constitute a promising first step towards studying anuran movement in relation to landscape structure at fine spatial and temporal scales.
{"title":"Movement behaviour of the common frog (Rana temporaria) in an anthropized mountain landscape: integrated step selection analysis of GPS tracking data","authors":"Etienne Boncourt, Björn Reineking, Gabriel Chambonnet, Stéphanie Gaucherand","doi":"10.1163/15685381-bja10164","DOIUrl":"https://doi.org/10.1163/15685381-bja10164","url":null,"abstract":"\u0000Movement is a key aspect of amphibian ecology as the life cycle of many species involves seasonal dispersal and migration. However, there is still a lack of knowledge about how amphibians move across landscapes in relation to landscape structure and resource availability. Modern lightweight GPS loggers and associated statistical tools offer new perspectives to fill this gap. We tracked the movements of 20 adult European common frogs (Rana temporaria) in a human-transformed mountain landscape during summer using GPS tags programmed with a constant 4-hour time interval between fixes. Using integrated step-selection analysis, we demonstrate firstly that frogs strongly selected aquatic habitats over open grassland. Second, ski runs have a negative effect on frogs, indicated by longer movement steps. Weather (air temperature and rain) had no effect on frog movements. These results constitute a promising first step towards studying anuran movement in relation to landscape structure at fine spatial and temporal scales.","PeriodicalId":50799,"journal":{"name":"Amphibia-Reptilia","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139000105","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}
Pub Date : 2023-12-04DOI: 10.1163/15685381-bja10163
Gustavo Campillo-García, O. Flores-Villela, Brett O. Butler, Miriam Benabib, Riccardo Castiglia
A phylogenetic reassessment of the Sceloporus torquatus species complex is presented using a multilocus approach. Topological conflicts related to a clade belonging to disjunct southern populations of S. madrensis are resolved, confirming the identity of such populations as distinct from the nominal populations of S. madrensis located 175 kilometres to the north. We describe this southern clade as a new species distributed in the Sierra Madre Oriental based on its phylogenetic distinctiveness and a combination of morphological characters and measurements, increasing the number of recognised species in the S. torquatus complex to seven.
{"title":"More cryptic diversity among spiny lizards of the Sceloporus torquatus complex discovered through a multilocus approach","authors":"Gustavo Campillo-García, O. Flores-Villela, Brett O. Butler, Miriam Benabib, Riccardo Castiglia","doi":"10.1163/15685381-bja10163","DOIUrl":"https://doi.org/10.1163/15685381-bja10163","url":null,"abstract":"\u0000A phylogenetic reassessment of the Sceloporus torquatus species complex is presented using a multilocus approach. Topological conflicts related to a clade belonging to disjunct southern populations of S. madrensis are resolved, confirming the identity of such populations as distinct from the nominal populations of S. madrensis located 175 kilometres to the north. We describe this southern clade as a new species distributed in the Sierra Madre Oriental based on its phylogenetic distinctiveness and a combination of morphological characters and measurements, increasing the number of recognised species in the S. torquatus complex to seven.","PeriodicalId":50799,"journal":{"name":"Amphibia-Reptilia","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138602108","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}
Pub Date : 2023-11-27DOI: 10.1163/15685381-bja10161
Leonardo F.B. Moreira, Natália P. Smaniotto, K. Ceron, D. Santana, Vanda L. Ferreira, Christine Strüssmann, Ulisses Galatti
Fire and land cover are two elements intertwined with the natural history of organisms from seasonally dry environments. Here, we investigated the influence of fire attributes (burned area and frequently-burned area) and land cover on the relative abundance of three amphibians from the Pantanal ecoregion that belong to distinct ecomorphological groups: Chiasmocleis albopunctata, Pseudis platensis, and Scinax acuminatus. We systematically reviewed amphibian ecology studies in the Pantanal and analysed quantitative data between 2000 and 2021, comprising 34 sites from 12 amphibian surveys. Amphibian abundance, land cover, and fire data were assessed within buffers of a 1000 m radius. Species abundance was correlated with burned area and wetland cover. While the abundance of C. albopunctata and P. platensis decreased with burned area in the last three years, the abundance of S. acuminatus increased with wetland cover. Despite the claimed resilience of species inhabiting grasslands and savannas, there was substantial evidence for the influence of burned areas, even under modest human land use. Our findings illustrate that a broad array of land cover and fire attributes may influence amphibian persistence in the Pantanal ecoregion, with the magnitude depending on species traits often overlooked in modelling approaches.
{"title":"Ashes still smoking: the influence of fire and land cover on Pantanal ecoregion amphibians","authors":"Leonardo F.B. Moreira, Natália P. Smaniotto, K. Ceron, D. Santana, Vanda L. Ferreira, Christine Strüssmann, Ulisses Galatti","doi":"10.1163/15685381-bja10161","DOIUrl":"https://doi.org/10.1163/15685381-bja10161","url":null,"abstract":"Fire and land cover are two elements intertwined with the natural history of organisms from seasonally dry environments. Here, we investigated the influence of fire attributes (burned area and frequently-burned area) and land cover on the relative abundance of three amphibians from the Pantanal ecoregion that belong to distinct ecomorphological groups: Chiasmocleis albopunctata, Pseudis platensis, and Scinax acuminatus. We systematically reviewed amphibian ecology studies in the Pantanal and analysed quantitative data between 2000 and 2021, comprising 34 sites from 12 amphibian surveys. Amphibian abundance, land cover, and fire data were assessed within buffers of a 1000 m radius. Species abundance was correlated with burned area and wetland cover. While the abundance of C. albopunctata and P. platensis decreased with burned area in the last three years, the abundance of S. acuminatus increased with wetland cover. Despite the claimed resilience of species inhabiting grasslands and savannas, there was substantial evidence for the influence of burned areas, even under modest human land use. Our findings illustrate that a broad array of land cover and fire attributes may influence amphibian persistence in the Pantanal ecoregion, with the magnitude depending on species traits often overlooked in modelling approaches.","PeriodicalId":50799,"journal":{"name":"Amphibia-Reptilia","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139227882","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}
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