Journal of Zoology最新文献

{"title":"Cozy den or winter walk: the effects of climate and supplementary feeding on brown bear winter behavior","authors":"N. Bogdanović,&nbsp;A. Zedrosser,&nbsp;A. G. Hertel,&nbsp;D. Ćirović","doi":"10.1111/jzo.13174","DOIUrl":"10.1111/jzo.13174","url":null,"abstract":"<p>Hibernation is a key adaptation for coping with unfavorable climatic conditions and low food availability in areas with severe winter conditions. While understanding the physiology and phenology of this adaptation has received considerable attention, comparatively little information is available on how hibernation will be affected by changing climate conditions. We used GPS telemetry data from 20 free-ranging brown bears monitored over 31 winters between 2007 and 2022, to identify behavioral strategies of bears during winter. We applied behavioral change point analysis to quantify brown bears’ hibernation phenology in a population close to the bear's southern latitudinal range limit in Europe where supplementary food is available to bears year-round. We observed winter behavior patterns that varied across age and reproductive classes but also within individuals between winters. Among 31 winter events, we registered six cases in which bears exhibited a single hibernation/stationary period and 19 events where hibernation was split into up to five stationary periods. Moreover, six winter events did not show behaviors consistent with hibernation and individuals remained partly or completely active throughout winter. The movement of these active bears decreased with increasing snow depth. In addition, these winter-active bears showed higher fidelity to supplementary feeding sites during the winter period compared to the rest of the year. Our data suggest that an abundance of human-provided food resources during winter may facilitate the emergence of different wintering strategies in brown bears. Furthermore, supplemental feeding sites in combination with predicted mild winters and prolonged natural food availability suggest that the use of hibernation as an energy-saving strategy to overcome severe environmental conditions may decrease in the future.</p>","PeriodicalId":17600,"journal":{"name":"Journal of Zoology","volume":"323 4","pages":"292-304"},"PeriodicalIF":1.9,"publicationDate":"2024-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jzo.13174","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140935475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A new view of territoriality in large eagles: the territory pre-exists regardless of its occupants","authors":"S. Morollón,&nbsp;P. López-López,&nbsp;V. Urios","doi":"10.1111/jzo.13171","DOIUrl":"10.1111/jzo.13171","url":null,"abstract":"<p>Knowledge of vertebrate territoriality and spatial use is a topic of great interest in the study of animal behaviour and conservation biology. Investigating the plasticity of territory boundaries, the shape of territories and how territories can be modified depending on their owners is important to deepen our knowledge of the behaviour of territorial species. We analysed the variation and tested the similarity of the distribution area of individuals from the same territory between 2015 and 2021, using data from 51 Bonelli's eagles (<i>Aquila fasciata</i>) from 22 different territories, tagged with GPS/GSM transmitters in eastern Spain. We calculated the percentage of overlap between the territories of the same individual in different years using the 95% kernel density estimator. We also analysed the changes in territory size and shape following the replacement of territory owners either by a single individual or by the whole pair. Our results show that territories retain the same shape and extent regardless of the occupying members, and that their boundaries change little over time. Identifying and maintaining large eagle territories, regardless of their owners, is therefore key to ensuring the long-term recovery of these threatened species.</p>","PeriodicalId":17600,"journal":{"name":"Journal of Zoology","volume":"323 3","pages":"177-186"},"PeriodicalIF":1.9,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jzo.13171","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140888480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ecological niche variation drives morphological differentiation in tropical stream-dwelling newts from Indochina","authors":"D. V. Tran,&nbsp;D. V. Phan,&nbsp;K. A. Lau,&nbsp;K. Nishikawa","doi":"10.1111/jzo.13169","DOIUrl":"10.1111/jzo.13169","url":null,"abstract":"<p>Morphological diversity within organisms can arise from factors other than genetic diversity alone. Local adaptations and combinations of various factors are also involved in shaping morphology. We investigated the relationship between morphological diversity and ecological niche divergence within two related tropical stream-dwelling newt species from Indochina: <i>Paramesotriton deloustali</i> and <i>P. guangxiensis</i>. We identified sexual dimorphism within both species and a significantly larger body size in <i>P. deloustali</i> than in <i>P. guangxiensis</i>. Our findings highlighted that climatic variables strongly influence Asian warty newt distribution, indicating the potential effects of climate change on tropical newt populations. Furthermore, we identified significant intra- and interspecific morphological and niche differentiation across five populations of the two newt species, suggesting that newt morphology is responsive to environmental factors. A significant negative relationship was observed only between ecological niche similarity and geographic distance among various combinations of factors, indicating that the distinct morphology of the study species mirrors ecological adaptation.</p>","PeriodicalId":17600,"journal":{"name":"Journal of Zoology","volume":"323 3","pages":"225-239"},"PeriodicalIF":1.9,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140832082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hindlimb myology in two piscivorous raptorial birds: a quantitative comparison of the osprey and the white-tailed sea eagle (Aves, Accipitriformes)","authors":"M. C. Mosto,&nbsp;M. B. J. Picasso,&nbsp;A. M. Tudisca,&nbsp;O. Krone","doi":"10.1111/jzo.13172","DOIUrl":"10.1111/jzo.13172","url":null,"abstract":"<p>The hindlimbs of Accipitriformes are vital for capturing prey. Research on hindlimb musculature has primarily focused on species preferring avian and mammalian prey, whereas piscivorous species have received limited attention. This study aims to investigate the quantitative characteristics of hindlimb muscles in two piscivorous Accipitriformes, <i>Pandion haliaetus</i> and <i>Haliaeetus albicilla</i>, to discern potential muscular features associated with their specific food preference. The mass and proportion of all hindlimb muscles in both species were assessed based on their primary function (flexion or extension). A Kruskal-Wallis test was employed to analyze possible differences in muscle mass between species. The allometric relationships between the muscles and body mass were explored with the reduced major axis method. Additionally, a study on the architectural parameters of the primary gripping muscles in <i>P. haliaetus</i> was conducted, using published information from other raptorial birds for comparison. The isometric scaling relationship predominated in the majority of individual muscles helping maintain a proportional relationship relative to body mass. Both species exhibited a similar pattern in terms of quantitative muscle features, implying a preservation of muscle characteristics linked to their predatory capabilities. The largest proportion of hindlimb muscle mass was dedicated to digit flexion in accordance with the grasping abilities of birds of prey. The muscles tibialis cranialis, flexor digitorum longus and flexor hallucis longus exhibited the greatest mass, high physiological cross-sectional area values, and long fibre, categorizing them as high-power specialists. These muscles are crucial in the flexion movements that produce the gripping action that characterizes birds of prey. Although no statistically significant differences were detected, each species displayed slightly distinct muscular characteristics, particularly in the architectural properties of the flexor muscles controlling digits II, III, and IV. These variations seem to be associated with differences in their prey preferences.</p>","PeriodicalId":17600,"journal":{"name":"Journal of Zoology","volume":"323 3","pages":"240-252"},"PeriodicalIF":1.9,"publicationDate":"2024-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140832085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New data and taxonomic changes influence our understanding of biogeographic patterns: A case study in Australian skinks","authors":"T. Flanagan,&nbsp;G. M. Shea,&nbsp;U. Roll,&nbsp;R. Tingley,&nbsp;S. Meiri,&nbsp;D. G. Chapple","doi":"10.1111/jzo.13173","DOIUrl":"10.1111/jzo.13173","url":null,"abstract":"<p>Species are the most commonly used unit of biogeography research, and in many conservation schemes. For many faunal groups, taxonomy is in a constant state of flux, with new species being described, and our concept of existing species regularly being refined. Using the most diverse lineage of Australian lizards (460+ species), the skinks (Family Scincidae), we quantified the impacts of taxonomic changes over time on our understanding of species richness, endemism and beta diversity. We generated surfaces of species richness, endemism and beta diversity from four editions (1975, 1988, 2000, 2014) of an authoritative field guide to understand how taxonomic shifts, and enhanced biogeographic knowledge, influenced the inferred biogeographic patterns in Australian skinks. The number of recognized Australian skink species has increased 2.3-fold since 1975. The Wet Tropics was the major hotspot for (mostly locally endemic) species additions. Hotspots of species richness and beta diversity remained broadly similar over time, but some important local hotspots shifted. Endemism hotspots were weakly associated with hotspots of species additions over time except in the Wet Tropics. The major shifts in biogeographic patterns, which were not associated with taxonomic changes, resulted from better knowledge of species distributions through time. We hypothesize that the effects of taxonomy on biogeographic patterns we found generalize across clades and regions—especially away from major research hotspots. We suggest an understanding of the impact of taxonomic changes on conservation priorities for particular regions and taxonomic groups is needed.</p>","PeriodicalId":17600,"journal":{"name":"Journal of Zoology","volume":"323 4","pages":"317-330"},"PeriodicalIF":1.9,"publicationDate":"2024-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jzo.13173","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140804043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Following urban predators – long-term snow-tracking data reveal changes in their abundance and habitat use","authors":"D. Krauze-Gryz,&nbsp;M. Jackowiak,&nbsp;D. Klich,&nbsp;J. Gryz,&nbsp;K. D. Jasińska","doi":"10.1111/jzo.13170","DOIUrl":"10.1111/jzo.13170","url":null,"abstract":"<p>Urban habitats differ from natural environments, however some predatory species have become established in cities across the globe. The aim of our study was to compare the occurrence of the red fox and the stone marten in Warsaw during three time periods (1976–1978, 2005–2008, 2015–2021) and in different habitats. Generalized linear models were used to show factors affecting the density indices of these two species (i.e., frequency of occurrence of tracks of each species recorded during snow tracking on linear transects). The frequency of occurrence of tracks of these two species on transects increased over time and was explained by habitat type and distance from the city centre. The frequency of fox tracks was higher in more-natural habitats located far from the city centre. In the first period (1976–1978), this species was recorded only in forests and riparian areas. In the last period (2015–2021), its tracks were recorded frequently in built-up areas and cemeteries. From the beginning of the first period, the stone marten was recorded in a wider range of habitats than the fox and it colonized all habitat types in the subsequent periods, but a statistically significant increase was observed only for cemeteries. The frequency of occurrence of stone marten tracks was lower than that of red fox tracks in most natural and seminatural habitats (forests, parks, riparian areas). No relationship between the occurrence of the red fox and the stone marten was found. We speculate that the growth of the urban red fox numbers was driven by an increase in the national population as a result of anti-rabies vaccinations. In turn, the stone marten, being a synanthropic species, was present in the city centre from the beginning of the study, but it now occurs in a wider range of habitats.</p>","PeriodicalId":17600,"journal":{"name":"Journal of Zoology","volume":"323 3","pages":"213-224"},"PeriodicalIF":1.9,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140677614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Here comes the sun: Thermoregulatory behavior in ectotherms illuminated by light-level geolocators","authors":"J. G. Otten,&nbsp;I. T. Clifton,&nbsp;D. F. Becker,&nbsp;J. M. Refsnider","doi":"10.1111/jzo.13168","DOIUrl":"10.1111/jzo.13168","url":null,"abstract":"<p>Daily activity patterns of free-ranging wildlife affect a wide range of ecological and physiological processes and, in turn are affected by anthropogenic disturbances to the environment. However, obtaining a continuous record of activity without disturbing wild animals is logistically challenging. We used commercially available, multi-purpose light-level geolocator dataloggers to continuously record light environment and time spent out of water during 5-months (1 May to 9 September 2021) in an ectothermic freshwater turtle species, the northern map turtle (<i>Graptemys geographica</i>). We used these data to compare time of year and sex differences in thermoregulatory behavior in an ectothermic species in its natural habitat. We recorded &gt;500 000 data points from 17 individual turtles (nine males and eight females). We found no differences in the mean light levels, or proportion of time spent out of the water, between males and females. However, there was a significant effect of both time of year and sex by time of year interaction in both light level, proportion of time spent dry, and number of state changes (i.e., shuttling behavior, wet to dry or dry to wet), suggesting that turtles alter their aerial basking behavior over the course of the season and that the changes in patterns of aerial basking behavior differ between the sexes throughout the year. In general, the proportion of time spent dry decreased over the active season, with an increase during the last week of June and the first week of July, while the number of state changes increased in females during late May/early June before decreasing, while males remained relatively constant. These changes may reflect the different energetic demands associated with reproduction between the two sexes. The overall downward trend in aerial basking likely reflects the role of increasing environmental temperatures, particularly water temperature, in the maintenance of body temperature in this largely aquatic species.</p>","PeriodicalId":17600,"journal":{"name":"Journal of Zoology","volume":"323 3","pages":"253-261"},"PeriodicalIF":1.9,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140672698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"You can't see me: Background matching is independent of body temperature in the Western diamond-backed rattlesnake","authors":"O. Da Cunha,&nbsp;C. Fournier,&nbsp;L. M. Horne,&nbsp;B. M. Seymoure,&nbsp;J. D. Johnson","doi":"10.1111/jzo.13167","DOIUrl":"10.1111/jzo.13167","url":null,"abstract":"<p>Coloration is crucial for ambush mesopredators' survival as they depend on it for camouflage to hunt and avoid predation. Furthermore, coloration is especially important in ectotherms as it is linked to two essential functions for survival: thermoregulation and crypsis. In a context of trade-offs between thermoregulation and crypsis, the comprehension of how ectotherms employ color to address conflicting demands of thermoregulation and crypsis is limited. This study investigated background matching and thermoregulation in western diamond-backed rattlesnakes (<i>Crotalus atrox</i>). Rattlesnakes were predicted to better match selected microhabitats in terms of color, luminance, and pattern than random microhabitats within their home range, and body temperature was predicted to influence their body coloration with higher temperatures favoring lighter colors. Pictures of 14 radiotracked western diamond-backed rattlesnakes were taken <i>in situ</i> with a full spectrum camera (UV/VIS) and body temperature was recovered from internal temperature-datalogging radiotransmitters. <i>Crotalus atrox</i> matched the color, luminance, and pattern of the background better than a randomly selected background, thus enhancing background matching. Additionally, rattlesnake coloration varied independently of temperature indicating that rattlesnakes are behaviorally modifying crypsis regardless of thermoregulation.</p>","PeriodicalId":17600,"journal":{"name":"Journal of Zoology","volume":"323 3","pages":"201-212"},"PeriodicalIF":1.9,"publicationDate":"2024-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140570437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of reproductive seasonality on the excretion of fecal glucocorticoid metabolites in free-ranging Pampas Deer","authors":"F. Grotta-Neto,&nbsp;M. D. Christofoletti,&nbsp;U. Piovezan,&nbsp;C. M. Herédias-Ribas,&nbsp;J. M. B. Duarte","doi":"10.1111/jzo.13165","DOIUrl":"10.1111/jzo.13165","url":null,"abstract":"<p>Understanding how fecal glucocorticoid (GC) concentration is associated with reproduction in wild animals allows us to associate physiological stress with the costs of reproduction. Glucocorticoids are among the main stress-related hormones, and their secretion is strongly associated with reproductive seasonality. Using non-invasive methods (thereby avoiding causing stress), we used fecal GC metabolites (FGC) to test the hypothesis that the reproductive phase (mating, non-mating, gestation, and lactation) influences stress levels of the seasonally reproductive Pampas Deer (<i>Ozotoceros bezoarticus</i>). Furthermore, we compared FGC between sexes and between males of different antler statuses (velvet, hard, cast). During 1 year, in the Pantanal of Brazil, we collected 621 fresh fecal samples (327 from females, 294 from males) from which we estimated FGC using enzyme immunoassay (EIA). FGC concentrations varied by reproductive phase and antler status. Agonistic and courtship interactions associated with mating (i.e., fights between males, attempts to mount females), suggest that they influence FGC concentrations most strongly in both sexes. Females also had greater FGC concentrations during lactation, suggesting that this phase and parental care are also associated with increased physiological stress. In males, the association of FGC concentrations with antler status may be, in part, associated with photoperiod and testosterone secretion, both of which can trigger reproductive and agonistic behaviors. Finally, reproductive synchrony of the sexes causes similar FGC over time and suggests that environmental factors contribute as well. We show that non-invasive monitoring of glucocorticoid metabolites levels is an effective tool for detecting changes in the physiological stress response in Pampas Deer, suggesting that this tool will be useful for detecting changes in physiological stress caused by human disturbance, such as cattle ranching in Pantanal and similar disturbances elsewhere.</p>","PeriodicalId":17600,"journal":{"name":"Journal of Zoology","volume":"323 2","pages":"150-161"},"PeriodicalIF":2.0,"publicationDate":"2024-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140570352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fasting and digestion exert opposite effects on collective behavior in goldfish across contexts","authors":"L.-Q. Zeng,&nbsp;S.-J. Fu","doi":"10.1111/jzo.13166","DOIUrl":"10.1111/jzo.13166","url":null,"abstract":"<p>Animal groups are often composed of individuals with differences in their phenotypes (e.g. body size, personality, or internal nutritional state). Such differences in phenotypes between group mates can have significant consequences for the collective movement and behavior of a group. Here, we examined the effects of nutritional state and ecological context on the individual- and group-level behaviors of groups of shoaling goldfish (<i>Carassius auratus</i>) across an open water environment, an environment with food, and an environment with food and refuge. Fish were randomly manipulated to be in one of three nutritional states (control: fasted for 24 h, fasting: fasted for 1 week, and digestion: 2 h after feeding) and comprised five group compositions: the all-control (6 control fish), all-fasting (6 fasted fish), all-digestion (6 digesting fish), mixed con–fas (3 control fish and 3 fasted fish), and mixed con–dig treatment (3 control fish and 3 digesting fish). We found that compared to the control and fasted treatments, the fish in the digestion treatment had lower individual swimming speeds and nearest neighbor distances. However, group polarization was lower in the fasted treatment than in both the control and digestion treatments. For the two mixed treatments, individual and collective behaviors of the fish seemed to be intermediate in comparison to those of either the fasted or digestion treatments. Moreover, group-level differences in collective behaviors were maintained across different contexts. All five treatments exhibited considerable context-associated changes in collective behaviors, but behavioral repeatability was dependent on the nutritional state of the group composition. Our results suggest that nutritional state and ecological context influence both individual and collective behaviors and that fasting and digestion exert opposite effects on collective behaviors across ecological contexts.</p>","PeriodicalId":17600,"journal":{"name":"Journal of Zoology","volume":"323 3","pages":"187-200"},"PeriodicalIF":1.9,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140570436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}