Pinniped species undergo uniquely amphibious life histories that make them valuable subjects for many domains of research. Pinniped research has often progressed hand-in-hand with technological frontiers of wildlife biology, and drones represent a leap forward for methods of aerial remote sensing, enabling data collection, and integration at new scales of biological importance. Drone methods and data types provide four key opportunities for wildlife surveillance that are already advancing pinniped research and management: 1) repeat and on-demand surveillance, 2) high-resolution coverage at large extents, 3) morphometric photogrammetry, and 4) computer vision and deep learning applications. Drone methods for pinniped research represent early stages of technological adoption and can reshape the field as they scale towards the full potential of their techniques.
{"title":"Growth and opportunities for drone surveillance in pinniped research","authors":"Gregory D. Larsen, David W. Johnston","doi":"10.1111/mam.12325","DOIUrl":"10.1111/mam.12325","url":null,"abstract":"<p>Pinniped species undergo uniquely amphibious life histories that make them valuable subjects for many domains of research. Pinniped research has often progressed hand-in-hand with technological frontiers of wildlife biology, and drones represent a leap forward for methods of aerial remote sensing, enabling data collection, and integration at new scales of biological importance. Drone methods and data types provide four key opportunities for wildlife surveillance that are already advancing pinniped research and management: 1) repeat and on-demand surveillance, 2) high-resolution coverage at large extents, 3) morphometric photogrammetry, and 4) computer vision and deep learning applications. Drone methods for pinniped research represent early stages of technological adoption and can reshape the field as they scale towards the full potential of their techniques.</p>","PeriodicalId":49893,"journal":{"name":"Mammal Review","volume":"54 1","pages":"1-12"},"PeriodicalIF":4.9,"publicationDate":"2023-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/mam.12325","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135107279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Disentangling wildlife–cattle interactions in multi-host tuberculosis scenarios: systematic review and meta-analysis","authors":"Eduardo M. Ferreira, Elsa L. Duarte, Mónica V. Cunha, António Mira, Sara M. Santos","doi":"10.1111/mam.12324","DOIUrl":"10.1111/mam.12324","url":null,"abstract":"<p>\u0000 \u0000 </p>","PeriodicalId":49893,"journal":{"name":"Mammal Review","volume":"53 4","pages":"287-302"},"PeriodicalIF":4.9,"publicationDate":"2023-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45303214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marcello Franchini, Maria de las Mercedes Guerisoli
In coexisting carnivorans (Carnivora) relying on the same food resources, the dominant species imposes a cost on the inferior competitor by limiting its foraging ability. Tigers Panthera tigris and leopards Panthera pardus live in sympatry in most Asian countries and, because of their similar trophic niche, ‘interference competition’ may exist between these two predators. In fact, since tigers generally occupy prime habitats, leopards could be forced to roam into peripheral areas that are heavily used by humans to avoid competition, consequently increasing the risk of human‐leopard conflicts. Using information collected from the reviewed scientific literature, the purposes of this work were: 1) to assess if livestock predation by leopards increases in areas of coexistence with tigers, and 2) to characterise leopard attacks on livestock to discern the main factors involved in the human‐leopard conflict. Our findings showed that the leopard's ‘overall’ livestock predation rate (i.e. individuals taken/year) was higher in the absence of tigers than in their presence, and the same was observed for the ‘sheep and goat’ predation rate. These results confirm the leopard's tendency to take livestock and, especially, smaller prey. Conversely, the ‘cattle’ and ‘other’ predation rates were higher in the presence of tigers than in their absence, suggesting the existence of a sort of spatial segregation between predators in certain contexts. Lower levels of predation by leopards were observed on farms in which more prevention measures were used, than in those in which only one measure was implemented. We stress the importance of using proper prevention measures to mitigate human‐leopard conflicts. However, because their implementation may not be easy or economically feasible, the financial support given by carnivoran‐policy makers assumes remarkable importance to minimise the economic impact on local families and, in turn, to foster the coexistence between leopards and humans in shared landscapes.
{"title":"Interference competition driven by co-occurrence with tigers Panthera tigris may increase livestock predation by leopards Panthera pardus: a first step meta-analysis","authors":"Marcello Franchini, Maria de las Mercedes Guerisoli","doi":"10.1111/mam.12323","DOIUrl":"10.1111/mam.12323","url":null,"abstract":"In coexisting carnivorans (Carnivora) relying on the same food resources, the dominant species imposes a cost on the inferior competitor by limiting its foraging ability. Tigers Panthera tigris and leopards Panthera pardus live in sympatry in most Asian countries and, because of their similar trophic niche, ‘interference competition’ may exist between these two predators. In fact, since tigers generally occupy prime habitats, leopards could be forced to roam into peripheral areas that are heavily used by humans to avoid competition, consequently increasing the risk of human‐leopard conflicts.\u0000\u0000Using information collected from the reviewed scientific literature, the purposes of this work were: 1) to assess if livestock predation by leopards increases in areas of coexistence with tigers, and 2) to characterise leopard attacks on livestock to discern the main factors involved in the human‐leopard conflict.\u0000\u0000Our findings showed that the leopard's ‘overall’ livestock predation rate (i.e. individuals taken/year) was higher in the absence of tigers than in their presence, and the same was observed for the ‘sheep and goat’ predation rate. These results confirm the leopard's tendency to take livestock and, especially, smaller prey. Conversely, the ‘cattle’ and ‘other’ predation rates were higher in the presence of tigers than in their absence, suggesting the existence of a sort of spatial segregation between predators in certain contexts. Lower levels of predation by leopards were observed on farms in which more prevention measures were used, than in those in which only one measure was implemented.\u0000\u0000We stress the importance of using proper prevention measures to mitigate human‐leopard conflicts. However, because their implementation may not be easy or economically feasible, the financial support given by carnivoran‐policy makers assumes remarkable importance to minimise the economic impact on local families and, in turn, to foster the coexistence between leopards and humans in shared landscapes.","PeriodicalId":49893,"journal":{"name":"Mammal Review","volume":"53 4","pages":"271-286"},"PeriodicalIF":4.9,"publicationDate":"2023-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44278163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Luís M. Rosalino, Gonçalo Matias, João Carvalho, Francisco Álvares, Alexandre Azevedo, Victor Bandeira, Carlos Fernandes, Pablo Ferreras, Christian Gortázar, Jorge Lozano, Pedro Monterroso, Francisco Palomares, Nuno Santos, Rodrigo Serra, André Pinto da Silva, Emílio Virgós, Margarida Santos-Reis
Mammalian carnivores (Carnivora) are crucial components of landscapes, because of both their top-down effects on lower trophic level species and their sensitivity to bottom-up processes, such as limited food resources (e.g. due to climate instability). To understand their functional role in Iberian ecosystems more clearly, and to define effective plans for their management and conservation, it is crucial to sum up the available regional knowledge that can inform decision-making processes.
We review bio-ecological research on wild Iberian carnivores over 30 years (1990–2020) and identify key knowledge gaps and priority avenues for future research. Based on a systematic review of the scientific literature, we aimed to: 1) summarise current knowledge; 2) assess species and ecoregion representativeness; 3) identify key research topics addressed and those lacking investment and 4) suggest key future research priorities.
We examined 920 peer-reviewed articles involving wild Iberian mammalian carnivores, focusing on different bio-ecological issues. We found considerable heterogeneity in the topics and species investigated, as well as in the study areas (ecoregions) explored, with a mismatch between the research priorities identified by researchers and the knowledge gaps.
We suggest that future research should prioritise: 1) rear-edge populations that are at the southwestern limits of the species' Eurasian range, thus being particularly sensitive to the increasing fragmentation and aridity of Iberian ecosystems, and that were less studied (e.g. brown bear Ursus arctos, stoat Mustela erminea, European mink Mustela lutreola and pine marten Martes martes); 2) less-studied topics, such as morphometry and body condition, ecophysiology, and reproductive biology, all of which provide essential information for species' management and conservation and 3) specific ecoregions for which studies on species' adaptations to environmental and anthropic contexts are lacking (e.g. northern ecoregions of Iberia, Iberian conifer forests and Northwest Iberian montane forests). Our review provides the necessary background to support future research on carnivore populations in Iberia.
{"title":"Three decades of research on Iberian wild Carnivora: trends, highlights, and future directions","authors":"Luís M. Rosalino, Gonçalo Matias, João Carvalho, Francisco Álvares, Alexandre Azevedo, Victor Bandeira, Carlos Fernandes, Pablo Ferreras, Christian Gortázar, Jorge Lozano, Pedro Monterroso, Francisco Palomares, Nuno Santos, Rodrigo Serra, André Pinto da Silva, Emílio Virgós, Margarida Santos-Reis","doi":"10.1111/mam.12322","DOIUrl":"10.1111/mam.12322","url":null,"abstract":"<div>\u0000 \u0000 <p>\u0000 \u0000 </p><ol>\u0000 \u0000 \u0000 <li>Mammalian carnivores (Carnivora) are crucial components of landscapes, because of both their top-down effects on lower trophic level species and their sensitivity to bottom-up processes, such as limited food resources (e.g. due to climate instability). To understand their functional role in Iberian ecosystems more clearly, and to define effective plans for their management and conservation, it is crucial to sum up the available regional knowledge that can inform decision-making processes.</li>\u0000 \u0000 \u0000 <li>We review bio-ecological research on wild Iberian carnivores over 30 years (1990–2020) and identify key knowledge gaps and priority avenues for future research. Based on a systematic review of the scientific literature, we aimed to: 1) summarise current knowledge; 2) assess species and ecoregion representativeness; 3) identify key research topics addressed and those lacking investment and 4) suggest key future research priorities.</li>\u0000 \u0000 \u0000 <li>We examined 920 peer-reviewed articles involving wild Iberian mammalian carnivores, focusing on different bio-ecological issues. We found considerable heterogeneity in the topics and species investigated, as well as in the study areas (ecoregions) explored, with a mismatch between the research priorities identified by researchers and the knowledge gaps.</li>\u0000 \u0000 \u0000 <li>We suggest that future research should prioritise: 1) rear-edge populations that are at the southwestern limits of the species' Eurasian range, thus being particularly sensitive to the increasing fragmentation and aridity of Iberian ecosystems, and that were less studied (e.g. brown bear <i>Ursus arctos</i>, stoat <i>Mustela erminea</i>, European mink <i>Mustela lutreola</i> and pine marten <i>Martes martes</i>); 2) less-studied topics, such as morphometry and body condition, ecophysiology, and reproductive biology, all of which provide essential information for species' management and conservation and 3) specific ecoregions for which studies on species' adaptations to environmental and anthropic contexts are lacking (e.g. northern ecoregions of Iberia, Iberian conifer forests and Northwest Iberian montane forests). Our review provides the necessary background to support future research on carnivore populations in Iberia.</li>\u0000 </ol>\u0000 \u0000 </div>","PeriodicalId":49893,"journal":{"name":"Mammal Review","volume":"53 4","pages":"254-270"},"PeriodicalIF":4.9,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42691436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Stefano Palmero, Joe Premier, Stephanie Kramer-Schadt, Pedro Monterroso, Marco Heurich
{"title":"Sampling variables and their thresholds for the precise estimation of wild felid population density with camera traps and spatial capture–recapture methods","authors":"Stefano Palmero, Joe Premier, Stephanie Kramer-Schadt, Pedro Monterroso, Marco Heurich","doi":"10.1111/mam.12320","DOIUrl":"10.1111/mam.12320","url":null,"abstract":"<p>\u0000 \u0000 </p>","PeriodicalId":49893,"journal":{"name":"Mammal Review","volume":"53 4","pages":"223-237"},"PeriodicalIF":4.9,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/mam.12320","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43223355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ana M. Correia, Erich Dietterle, Ana Dinis, Filipe Alves
{"title":"Defining a common language to assess external deformities in free-ranging cetaceans","authors":"Ana M. Correia, Erich Dietterle, Ana Dinis, Filipe Alves","doi":"10.1111/mam.12318","DOIUrl":"10.1111/mam.12318","url":null,"abstract":"<p>\u0000 \u0000 </p>","PeriodicalId":49893,"journal":{"name":"Mammal Review","volume":"53 3","pages":"189-205"},"PeriodicalIF":4.9,"publicationDate":"2023-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/mam.12318","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43217876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Predation on ungulates exposes large predators to conflicts with farmers and hunters if they kill livestock and shared game species. Therefore, it is crucial to know the drivers of predation on large prey, understand how they differ from predation on smaller prey and reveal general large-scale patterns.
We tested three hypotheses in the global Eurasian lynx Lynx lynx population: 1) consumption of ungulates and hares increases with their densities, 2) effects of predictors on ungulate and hare predation differ between continents, latitudes, longitudes and landscapes, 3) effects of predictors are generally applicable regardless of study materials (scats, carcasses and intestinal tracts).
We collected information from 70 publications, including data from 174 study cases (107 from Europe and 67 from Asia) and 114 sites in 30 countries, mainly Russia (73 cases and 46 sites). Linear regression of logit-transformed data and logistic regression were used to test the hypotheses.
We found that ungulates made up more than half of the lynx diet in areas containing at least 570 individual ungulates/100 km2 and/or located south of 56°N. Predominance of ungulates in the diet could be related to the higher availability of the main medium-sized ungulate prey species, and to the presence of (mixed) broadleaf deciduous forests with open spaces providing optimal hunting conditions. No significant effects on hare consumption by lynx were revealed, possibly because of a small sample size of hare density data from lynx habitats, fluctuations and instability of hares as a food resource, declines of some hare populations and separation in habitat use by lynx and hares.
We conclude that the Eurasian lynx is an adaptable predator, not a lagomorph specialist; throughout its range, the lynx takes ungulates according to their availability. The use of practical nonlethal interventions is important to limit the availability of domestic ungulates (livestock and game) for predation by lynx, and to promote human-lynx coexistence.
{"title":"Patterns of predation by the Eurasian lynx Lynx lynx throughout its range: ecological and conservation implications","authors":"Igor Khorozyan, Marco Heurich","doi":"10.1111/mam.12317","DOIUrl":"10.1111/mam.12317","url":null,"abstract":"<div>\u0000 \u0000 <p>\u0000 \u0000 </p><ol>\u0000 \u0000 \u0000 <li>Predation on ungulates exposes large predators to conflicts with farmers and hunters if they kill livestock and shared game species. Therefore, it is crucial to know the drivers of predation on large prey, understand how they differ from predation on smaller prey and reveal general large-scale patterns.</li>\u0000 \u0000 \u0000 <li>We tested three hypotheses in the global Eurasian lynx <i>Lynx lynx</i> population: 1) consumption of ungulates and hares increases with their densities, 2) effects of predictors on ungulate and hare predation differ between continents, latitudes, longitudes and landscapes, 3) effects of predictors are generally applicable regardless of study materials (scats, carcasses and intestinal tracts).</li>\u0000 \u0000 \u0000 <li>We collected information from 70 publications, including data from 174 study cases (107 from Europe and 67 from Asia) and 114 sites in 30 countries, mainly Russia (73 cases and 46 sites). Linear regression of logit-transformed data and logistic regression were used to test the hypotheses.</li>\u0000 \u0000 \u0000 <li>We found that ungulates made up more than half of the lynx diet in areas containing at least 570 individual ungulates/100 km<sup>2</sup> and/or located south of 56°N. Predominance of ungulates in the diet could be related to the higher availability of the main medium-sized ungulate prey species, and to the presence of (mixed) broadleaf deciduous forests with open spaces providing optimal hunting conditions. No significant effects on hare consumption by lynx were revealed, possibly because of a small sample size of hare density data from lynx habitats, fluctuations and instability of hares as a food resource, declines of some hare populations and separation in habitat use by lynx and hares.</li>\u0000 \u0000 \u0000 <li>We conclude that the Eurasian lynx is an adaptable predator, not a lagomorph specialist; throughout its range, the lynx takes ungulates according to their availability. The use of practical nonlethal interventions is important to limit the availability of domestic ungulates (livestock and game) for predation by lynx, and to promote human-lynx coexistence.</li>\u0000 </ol>\u0000 \u0000 </div>","PeriodicalId":49893,"journal":{"name":"Mammal Review","volume":"53 3","pages":"177-188"},"PeriodicalIF":4.9,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45013049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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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