Luke Pearson, Lucas Haralson, Gabrielle Berry, Grover J. Brown, C. Qualls
Abstract - Macrochelys temminckii (Alligator Snapping Turtle) was recently proposed as a threatened species under the US Endangered Species Act due to current and projected future declining populations range wide. Despite a presumed statewide distribution in Mississippi, the Alligator Snapping Turtle had been documented in only 32 of 82 counties between 1857 and 2012, thus leaving a substantial gap in our knowledge of this species' distribution. Therefore, we collected credible records from museums, literature, and the general public, as well as directly assessed the current distribution and relative abundance of the Alligator Snapping Turtle in all major river systems (i.e., Pascagoula, Pearl, Tombigbee, and Mississippi river drainages) in Mississippi. From 2017 to 2021, we systematically trapped 77 sites across the state totaling 839 captures of 787 individual Alligator Snapping Turtles over the course of 4750 trap nights. State-wide catch per unit effort (CPUE) averaged 0.177, with the Big Black River (0.348) and Tombigbee River (0.028) drainages having the highest and lowest average CPUE, respectively. In Mississippi, CPUE was positively correlated with greater surrounding wetland area and river size, and negatively correlated with terrain ruggedness. This survey, along with the collaboration of other biologists and the public, verified an additional 189 locality records in 56 counties, with Alligator Snapping Turtle presence reconfirmed at 29 of 30 historical localities. Currently, it appears that there have been no local extirpations of the species in Mississippi, and state-wide CPUE was higher than those of the surrounding states.
摘要短吻鳄鳄龟(Macrochelys temminckii)最近被列入美国濒危物种法案(Endangered species Act)的濒危物种名单，因为目前和预计未来其数量将会下降。尽管假定鳄鳄鳄龟在密西西比州分布在全州，但在1857年至2012年期间，82个县中只有32个县记录了鳄鳄鳄龟，因此我们对该物种分布的了解存在很大差距。因此，我们从博物馆、文献和公众中收集了可靠的记录，并直接评估了鳄鳄鳄龟在密西西比州所有主要河流系统(即帕斯卡古拉河、珀尔河、汤比格比河和密西西比河流域)中的当前分布和相对丰度。从2017年到2021年，我们系统地在全州77个地点捕获了787只鳄鳄龟，总共捕获了839只。全州平均单位努力渔获量(CPUE)为0.177，其中大黑河(0.348)和汤比比河(0.028)流域的平均CPUE分别最高和最低。在密西西比州，CPUE与周边湿地面积和河流大小呈正相关，与地形崎岖度呈负相关。这项调查，连同其他生物学家和公众的合作，核实了56个县的189个地方记录，在30个历史地点中的29个重新确认了鳄鳄龟的存在。目前，在密西西比州似乎还没有出现该物种的局部灭绝，而且全州的CPUE高于周围各州。
{"title":"Distribution Patterns and Factors Influencing Relative Abundance of the Alligator Snapping Turtle (Macrochelys temminckii) in Mississippi","authors":"Luke Pearson, Lucas Haralson, Gabrielle Berry, Grover J. Brown, C. Qualls","doi":"10.1656/058.022.0sp1209","DOIUrl":"https://doi.org/10.1656/058.022.0sp1209","url":null,"abstract":"Abstract - Macrochelys temminckii (Alligator Snapping Turtle) was recently proposed as a threatened species under the US Endangered Species Act due to current and projected future declining populations range wide. Despite a presumed statewide distribution in Mississippi, the Alligator Snapping Turtle had been documented in only 32 of 82 counties between 1857 and 2012, thus leaving a substantial gap in our knowledge of this species' distribution. Therefore, we collected credible records from museums, literature, and the general public, as well as directly assessed the current distribution and relative abundance of the Alligator Snapping Turtle in all major river systems (i.e., Pascagoula, Pearl, Tombigbee, and Mississippi river drainages) in Mississippi. From 2017 to 2021, we systematically trapped 77 sites across the state totaling 839 captures of 787 individual Alligator Snapping Turtles over the course of 4750 trap nights. State-wide catch per unit effort (CPUE) averaged 0.177, with the Big Black River (0.348) and Tombigbee River (0.028) drainages having the highest and lowest average CPUE, respectively. In Mississippi, CPUE was positively correlated with greater surrounding wetland area and river size, and negatively correlated with terrain ruggedness. This survey, along with the collaboration of other biologists and the public, verified an additional 189 locality records in 56 counties, with Alligator Snapping Turtle presence reconfirmed at 29 of 30 historical localities. Currently, it appears that there have been no local extirpations of the species in Mississippi, and state-wide CPUE was higher than those of the surrounding states.","PeriodicalId":49490,"journal":{"name":"Southeastern Naturalist","volume":"51 1","pages":"138 - 156"},"PeriodicalIF":0.6,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75148436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Gerald R. Johnston, Jeremy S. Geiger, Travis M. Thomas, Kevin M. Enge, E. Suarez, Bryant Davis
Abstract - The published literature does not provide a consensus regarding maximum body sizes of North America's largest wild freshwater turtles (genus Macrochelys). The largest known wild M. suwanniensis (Suwannee Alligator Snapping Turtle) currently exists as a curated specimen measuring 713 mm straight-midline carapace length, 801 mm maximum carapace length, 619 mm maximum carapace width, and 236 mm maximum head width. The turtle was never weighed, but we used morphometric data from our studies in the Santa Fe and Suwannee rivers to estimate that it weighed ∼76.4 kg (168 lbs) when captured. Our 95% prediction interval (67.6–86.3 kg [149–190 lbs]) suggests that speculative estimates and anecdotal reports of M. suwanniensis that weigh ≥90 kg (≥200 lbs) are dubious.
{"title":"Maximum Body Size of the Suwannee Alligator Snapping Turtle (Macrochelys suwanniensis)","authors":"Gerald R. Johnston, Jeremy S. Geiger, Travis M. Thomas, Kevin M. Enge, E. Suarez, Bryant Davis","doi":"10.1656/058.022.0sp1226","DOIUrl":"https://doi.org/10.1656/058.022.0sp1226","url":null,"abstract":"Abstract - The published literature does not provide a consensus regarding maximum body sizes of North America's largest wild freshwater turtles (genus Macrochelys). The largest known wild M. suwanniensis (Suwannee Alligator Snapping Turtle) currently exists as a curated specimen measuring 713 mm straight-midline carapace length, 801 mm maximum carapace length, 619 mm maximum carapace width, and 236 mm maximum head width. The turtle was never weighed, but we used morphometric data from our studies in the Santa Fe and Suwannee rivers to estimate that it weighed ∼76.4 kg (168 lbs) when captured. Our 95% prediction interval (67.6–86.3 kg [149–190 lbs]) suggests that speculative estimates and anecdotal reports of M. suwanniensis that weigh ≥90 kg (≥200 lbs) are dubious.","PeriodicalId":49490,"journal":{"name":"Southeastern Naturalist","volume":"1 1","pages":"418 - 428"},"PeriodicalIF":0.6,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76719025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract - We studied the determination of sex for intermediate size classes and adult sexual dimorphism in a Georgia population of Macrochelys temminckii (Alligator Snapping Turtle). We sexed turtles when possible based on size and morphometrics. We took blood samples from captured individuals and measured plasma testosterone using enzyme-linked immunoassay. We examined females and individuals for which sex was unknown using ultrasound to determine sex and reproductive status. We used testosterone concentration to confirm individual sex assignments. For all biometric measurements, adult males were larger than females. Testosterone concentrations were higher in adult and subadult males than in females. Head width did not differ between the sexes when adjusted for body size. Plastron-to-vent length (cm) and testosterone concentrations were significantly greater in adult and subadult male turtles compared to females and were valuable in determining sex of smaller adults >25 cm straight-midline carapace length.
{"title":"Determining Sexual Size Dimorphism in an Alligator Snapping Turtle (Macrochelys temminckii) Population in Southwest Georgia: Use of Morphometrics, Ultrasonography, and Testosterone","authors":"D. Rostal, Amber Teare, Philip Marley, J. Jensen","doi":"10.1656/058.022.0sp1215","DOIUrl":"https://doi.org/10.1656/058.022.0sp1215","url":null,"abstract":"Abstract - We studied the determination of sex for intermediate size classes and adult sexual dimorphism in a Georgia population of Macrochelys temminckii (Alligator Snapping Turtle). We sexed turtles when possible based on size and morphometrics. We took blood samples from captured individuals and measured plasma testosterone using enzyme-linked immunoassay. We examined females and individuals for which sex was unknown using ultrasound to determine sex and reproductive status. We used testosterone concentration to confirm individual sex assignments. For all biometric measurements, adult males were larger than females. Testosterone concentrations were higher in adult and subadult males than in females. Head width did not differ between the sexes when adjusted for body size. Plastron-to-vent length (cm) and testosterone concentrations were significantly greater in adult and subadult male turtles compared to females and were valuable in determining sex of smaller adults >25 cm straight-midline carapace length.","PeriodicalId":49490,"journal":{"name":"Southeastern Naturalist","volume":"50 1","pages":"250 - 263"},"PeriodicalIF":0.6,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84203486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Biology and Conservation of Alligator Snapping Turtles (Macrochelys)Dedication","authors":"J. L. Carr, E. Kessler, Gerald R. Johnston","doi":"10.1656/058.022.0sp12i","DOIUrl":"https://doi.org/10.1656/058.022.0sp12i","url":null,"abstract":"","PeriodicalId":49490,"journal":{"name":"Southeastern Naturalist","volume":"49 1","pages":"i - i"},"PeriodicalIF":0.6,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81948275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Amy K. Shook, Charles D. Battaglia, Kevin M. Enge, Carlyle Franklin, J. Godwin, A. C. Johnson, E. Kessler, Eric C. Munscher, Kelly Norrid, Luke Pearson, Viviana Ricardez, Dirk J. Stevenson, Travis M. Thomas, J. L. Carr
Abstract - With the conservation status of Macrochelys (alligator snapping turtles) being examined at the national level, our objective was to compile categorical data on threats from anthropogenic interactions. We included information from (1) author-collected anecdotes on human–turtle interactions and (2) radiographs to assess the prevalence of ingested fishing hooks. We placed 173 interactions involving 192 incidents into 9 IUCN threat categories and found bycatch involving fish hooks to be 4 times more numerous than the second-most numerous threat, turtle persecution. Fishing bycatch resulted in a high proportion of turtle mortalities (39%), and bycatch incidents in several cases preceded the highest-mortality threat (53%), persecution of individuals involving shooting or blunt trauma. We recommend fishing bycatch-mitigation measures and educational efforts to help conserve Macrochelys.
{"title":"Anthropogenic Threats to Alligator Snapping Turtles (Chelydridae: Macrochelys)","authors":"Amy K. Shook, Charles D. Battaglia, Kevin M. Enge, Carlyle Franklin, J. Godwin, A. C. Johnson, E. Kessler, Eric C. Munscher, Kelly Norrid, Luke Pearson, Viviana Ricardez, Dirk J. Stevenson, Travis M. Thomas, J. L. Carr","doi":"10.1656/058.022.0sp1202","DOIUrl":"https://doi.org/10.1656/058.022.0sp1202","url":null,"abstract":"Abstract - With the conservation status of Macrochelys (alligator snapping turtles) being examined at the national level, our objective was to compile categorical data on threats from anthropogenic interactions. We included information from (1) author-collected anecdotes on human–turtle interactions and (2) radiographs to assess the prevalence of ingested fishing hooks. We placed 173 interactions involving 192 incidents into 9 IUCN threat categories and found bycatch involving fish hooks to be 4 times more numerous than the second-most numerous threat, turtle persecution. Fishing bycatch resulted in a high proportion of turtle mortalities (39%), and bycatch incidents in several cases preceded the highest-mortality threat (53%), persecution of individuals involving shooting or blunt trauma. We recommend fishing bycatch-mitigation measures and educational efforts to help conserve Macrochelys.","PeriodicalId":49490,"journal":{"name":"Southeastern Naturalist","volume":"24 1","pages":"25 - 55"},"PeriodicalIF":0.6,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84795286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. C. Johnson, Amy K. Shook, J. L. Carr, Neil H. Douglas
Abstract - The Alligator Snapping Turtle (Macrochelys temminckii) is a species of conservation concern across its range due to past commercial harvest for consumption. Northern Louisiana was originally surveyed in the 1980s, but the survey data were not compiled and published. After almost 40 years, we resurveyed the region to validate the historic data as well as provide current data on the distribution of Alligator Snapping Turtles. From the 1980s, we provide demographic data for 300 Alligator Snapping Turtles collected from 17 Louisiana parishes. From 2018–2020, we captured and measured 62 Alligator Snapping Turtles from 19 trapping sites. We recommend continued surveying and monitoring efforts in Louisiana to track populations during the post-commercial–harvest period.
{"title":"Status and Distribution of Alligator Snapping Turtles (Macrochelys temminckii) in Northern Louisiana","authors":"A. C. Johnson, Amy K. Shook, J. L. Carr, Neil H. Douglas","doi":"10.1656/058.022.0sp1210","DOIUrl":"https://doi.org/10.1656/058.022.0sp1210","url":null,"abstract":"Abstract - The Alligator Snapping Turtle (Macrochelys temminckii) is a species of conservation concern across its range due to past commercial harvest for consumption. Northern Louisiana was originally surveyed in the 1980s, but the survey data were not compiled and published. After almost 40 years, we resurveyed the region to validate the historic data as well as provide current data on the distribution of Alligator Snapping Turtles. From the 1980s, we provide demographic data for 300 Alligator Snapping Turtles collected from 17 Louisiana parishes. From 2018–2020, we captured and measured 62 Alligator Snapping Turtles from 19 trapping sites. We recommend continued surveying and monitoring efforts in Louisiana to track populations during the post-commercial–harvest period.","PeriodicalId":49490,"journal":{"name":"Southeastern Naturalist","volume":"21 1","pages":"157 - 170"},"PeriodicalIF":0.6,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91273469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Carlyle Franklin, Viviana Ricardez, Sal Scibetta, David Rosenbaum, Ben Grizzle
Abstract - Macrochelys temminckii (Alligator Snapping Turtle) is a shy, well-camouflaged species that often inhabits turbid water. These factors, as well as the success of baited hoop traps in attracting the species at night, have created the perception that the species is predominantly nocturnal and does not bask. However, a growing body of evidence suggests that the species is also diurnally active and does bask. The use of binoculars and high-range cameras combined with extensive time in the field allowed us to document 25 instances of diurnal activity including behaviors such as basking, protrusion of the head above water, swimming, and foraging (i.e., entering baited traps). Our observations contribute to increasing evidence that both adults and juveniles exhibit basking and other diurnal behaviors.
{"title":"Diurnal Observations of Alligator Snapping Turtles (Macrochelys temminckii)","authors":"Carlyle Franklin, Viviana Ricardez, Sal Scibetta, David Rosenbaum, Ben Grizzle","doi":"10.1656/058.022.0sp1225","DOIUrl":"https://doi.org/10.1656/058.022.0sp1225","url":null,"abstract":"Abstract - Macrochelys temminckii (Alligator Snapping Turtle) is a shy, well-camouflaged species that often inhabits turbid water. These factors, as well as the success of baited hoop traps in attracting the species at night, have created the perception that the species is predominantly nocturnal and does not bask. However, a growing body of evidence suggests that the species is also diurnally active and does bask. The use of binoculars and high-range cameras combined with extensive time in the field allowed us to document 25 instances of diurnal activity including behaviors such as basking, protrusion of the head above water, swimming, and foraging (i.e., entering baited traps). Our observations contribute to increasing evidence that both adults and juveniles exhibit basking and other diurnal behaviors.","PeriodicalId":49490,"journal":{"name":"Southeastern Naturalist","volume":"1 1","pages":"410 - 417"},"PeriodicalIF":0.6,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90270226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract - We investigated nesting behavior and terrestrial activity in a captive population of Macrochelys temminckii (Alligator Snapping Turtle) housed outdoors in semi-natural environmental conditions in Oklahoma. The nesting season lasted from 12 May to 15 June 2012, and turtles were most active between the hours 2300–0300. Nesting duration averaged 182.5 min. Over 50% of nest construction time was spent excavating the cavity, whereas covering the eggs accounted for ∼28% of the total duration. Individual females averaged 25 non-nesting emergences before successfully depositing eggs. Terrestrial activity was positively correlated with increasing average nighttime temperature. We found thermal profiles generated by temperature data loggers affixed to females useful for studying terrestrial activity during nesting.
{"title":"Nesting Behavior and Ecology in a Captive Population of Alligator Snapping Turtles (Macrochelys temminckii)","authors":"Denise M. Thompson, D. B. Ligon","doi":"10.1656/058.022.0sp1217","DOIUrl":"https://doi.org/10.1656/058.022.0sp1217","url":null,"abstract":"Abstract - We investigated nesting behavior and terrestrial activity in a captive population of Macrochelys temminckii (Alligator Snapping Turtle) housed outdoors in semi-natural environmental conditions in Oklahoma. The nesting season lasted from 12 May to 15 June 2012, and turtles were most active between the hours 2300–0300. Nesting duration averaged 182.5 min. Over 50% of nest construction time was spent excavating the cavity, whereas covering the eggs accounted for ∼28% of the total duration. Individual females averaged 25 non-nesting emergences before successfully depositing eggs. Terrestrial activity was positively correlated with increasing average nighttime temperature. We found thermal profiles generated by temperature data loggers affixed to females useful for studying terrestrial activity during nesting.","PeriodicalId":49490,"journal":{"name":"Southeastern Naturalist","volume":"1 1","pages":"275 - 296"},"PeriodicalIF":0.6,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82123913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. J. Apodaca, Alexander R. Krohn, Louisa Collins, J. Godwin, Luke Pearson, A. Walde
Abstract - Historically believed to harbor unrecognized diversity, the taxonomy of the declining genus Macrochelys (alligator snapping turtles) is debated. The original species, M. temminckii, was recently split into M. temminckii, M. apalachicolae, and M. suwanniensis. However, the status of M. apalachicolae is contested. In this study, we generated thousands of genome-wide loci to quantify population structure and genetic differentiation across the range of Macrochelys spp. Our data indicate that M. apalachicolae is genetically distinct, with little gene flow between M. apalachicolae and other species, thus adding evidence that M. apalachicolae may be a distinct species. We also find genetic variation partitioned among river drainages, with very high intra- and interspecific genetic divergence among river drainages. We suggest that translocations and re-introductions only move turtles in this genus within their natal river drainages to preserve existing patterns of genetic diversity.
{"title":"Population Structure and Genetic Differentiation in Extant Alligator Snapping Turtles (genus Macrochelys) with Implications for Taxonomy and Conservation","authors":"J. J. Apodaca, Alexander R. Krohn, Louisa Collins, J. Godwin, Luke Pearson, A. Walde","doi":"10.1656/058.022.0sp1201","DOIUrl":"https://doi.org/10.1656/058.022.0sp1201","url":null,"abstract":"Abstract - Historically believed to harbor unrecognized diversity, the taxonomy of the declining genus Macrochelys (alligator snapping turtles) is debated. The original species, M. temminckii, was recently split into M. temminckii, M. apalachicolae, and M. suwanniensis. However, the status of M. apalachicolae is contested. In this study, we generated thousands of genome-wide loci to quantify population structure and genetic differentiation across the range of Macrochelys spp. Our data indicate that M. apalachicolae is genetically distinct, with little gene flow between M. apalachicolae and other species, thus adding evidence that M. apalachicolae may be a distinct species. We also find genetic variation partitioned among river drainages, with very high intra- and interspecific genetic divergence among river drainages. We suggest that translocations and re-introductions only move turtles in this genus within their natal river drainages to preserve existing patterns of genetic diversity.","PeriodicalId":49490,"journal":{"name":"Southeastern Naturalist","volume":"1 1","pages":"1 - 24"},"PeriodicalIF":0.6,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72994595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mandi Gordon, David R. Bontrager, Jason E. Watson, Terry Corbett, Carla Crawford, Carlyle Franklin, Bill Kirby, Eric C. Munscher, Viviana Ricardez, Arron Tuggle
Abstract - Long-term studies on long-lived species are rare, as is the case for the Alligator Snapping Turtle (Macrochelys temminckii). Here, we developed a database of historical accounts drawing spatial and temporal data from local ecological knowledge (LEK) and non-LEK sources. Across all sources, we compiled 215 spatial and 263 temporal records. To test applicability of LEK, we conducted field surveys at sites selected based on LEK accounts, non-LEK accounts, and habitat. Our surveys yielded occupancy rates of 66.7%, 68.8%, and 40%, respectively, while detectability models estimated proportion of occupied sites to be 58–77%. Catch per unit effort did not vary when compared to previous assessments in Texas. Turtles were most active from February to September. Incorporation of LEK when developing study designs will ultimately enhance communication between researchers and local experts.
{"title":"Using Local Ecological Knowledge to Document Distribution and Temporal Patterns of Macrochelys temminckii in Texas","authors":"Mandi Gordon, David R. Bontrager, Jason E. Watson, Terry Corbett, Carla Crawford, Carlyle Franklin, Bill Kirby, Eric C. Munscher, Viviana Ricardez, Arron Tuggle","doi":"10.1656/058.022.0sp1211","DOIUrl":"https://doi.org/10.1656/058.022.0sp1211","url":null,"abstract":"Abstract - Long-term studies on long-lived species are rare, as is the case for the Alligator Snapping Turtle (Macrochelys temminckii). Here, we developed a database of historical accounts drawing spatial and temporal data from local ecological knowledge (LEK) and non-LEK sources. Across all sources, we compiled 215 spatial and 263 temporal records. To test applicability of LEK, we conducted field surveys at sites selected based on LEK accounts, non-LEK accounts, and habitat. Our surveys yielded occupancy rates of 66.7%, 68.8%, and 40%, respectively, while detectability models estimated proportion of occupied sites to be 58–77%. Catch per unit effort did not vary when compared to previous assessments in Texas. Turtles were most active from February to September. Incorporation of LEK when developing study designs will ultimately enhance communication between researchers and local experts.","PeriodicalId":49490,"journal":{"name":"Southeastern Naturalist","volume":"25 1","pages":"171 - 196"},"PeriodicalIF":0.6,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74317192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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