Animal Behaviour最新文献

{"title":"Open-ended vocal learning in Costa's hummingbird","authors":"Katherine E. Johnson ,&nbsp;Christopher J. Clark","doi":"10.1016/j.anbehav.2024.10.012","DOIUrl":"10.1016/j.anbehav.2024.10.012","url":null,"abstract":"<div><div>Here we examine whether vocal learning in Costa's hummingbird, <em>Calypte costae</em>, is open-ended. Open-ended learning is the ability of a vocal learning animal to memorize and learn to incorporate new song material into its vocal repertoire after reaching sexual maturity. Open-ended vocal learners are able to learn as adults because they have either a sensitive phase that never closes or a seasonal reopening of the sensitive phase. In prior experiments, we raised 18 individually housed male Costa's hummingbirds in isolation chambers from fledging (day 21 posthatch) until they were approximately 1 year old. During that time, they were tutored and learned song that was individually specific and stable. Here we report what happened when we moved cohorts of eight (in 2017) and six (in 2018) of these ∼1-year-old birds to communal housing in two outdoor aviaries, placing them in physical, visual and acoustic contact with other adult Costa's hummingbirds that sang songs to which each individual had never previously been exposed. The remaining four 1-year-old birds (in 2018) were instead kept in isolation for their second year as a control, then first exposed to each other at 2 years of age. Within 2 months, all of the 1-year-old birds rapidly changed their songs to produce novel songs that were unique to each aviary. The control birds that remained in isolation for a second year did not change their songs. These second-year birds then changed their songs when they were moved to the aviaries and exposed to novel song for the first time at 2 years of age. Although additional experiments are important (e.g. tutoring adults raised in the wild), our results show that Costa's hummingbirds have open-ended vocal learning through at least their third year.</div></div>","PeriodicalId":50788,"journal":{"name":"Animal Behaviour","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142592574","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}

{"title":"","authors":"Noa Pinter-Wollman","doi":"10.1016/j.anbehav.2024.10.004","DOIUrl":"10.1016/j.anbehav.2024.10.004","url":null,"abstract":"","PeriodicalId":50788,"journal":{"name":"Animal Behaviour","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142592575","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}

{"title":"Activity of Asiatic lions in relation to activity of prey and kleptoparasitism","authors":"Kausik Banerjee ,&nbsp;Chittaranjan V. Dave ,&nbsp;Kartikeya Singh Chauhan ,&nbsp;Shomen Mukherjee ,&nbsp;Yadvendradev V. Jhala","doi":"10.1016/j.anbehav.2024.10.002","DOIUrl":"10.1016/j.anbehav.2024.10.002","url":null,"abstract":"<div><div>Carnivores alter their activity to maximize individual fitness by increasing encounters with prey, reducing overlap with humans and minimizing opportunities for loss of kills to kleptoparasitism. We observed 16 radiocollared lions, <em>Panthera leo leo</em>, within the Gir landscape by continuous focal animal sampling for a period of 2–10 days in each session and studied their hunting and feeding patterns with respect to the activity patterns of their prey, chital and domestic livestock. Lions were mostly active during the night while most of the day was spent resting under cover, when temperatures and human activity were high. Activity of lions differed between the sexes but coincided with the activity of their prey. Feeding intervals and feeding bouts for lions were longer inside the protected area compared to multiuse landscapes outside it. Lions tended to feed longer on predated than scavenged carcasses. Livestock comprised the majority of the lions’ diet in the Gir landscape. We observed a low level of kleptoparasitism in the Asiatic lions compared with their counterparts in the Serengeti in Africa. Hunting by lionesses declined during the corresponding male activity period, possibly to minimize kleptoparasitism by male lions. We conclude that the hunting and feeding times of lions are adapted to maximize payoffs.</div></div>","PeriodicalId":50788,"journal":{"name":"Animal Behaviour","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142586365","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}

{"title":"Hard exoskeleton of beetles as armour against avian predators","authors":"Wataru Kojima ,&nbsp;Kosuke Hidaka ,&nbsp;Sakito Koizumi ,&nbsp;Yuta Murayama ,&nbsp;Toshiyuki Nakata","doi":"10.1016/j.anbehav.2024.10.007","DOIUrl":"10.1016/j.anbehav.2024.10.007","url":null,"abstract":"<div><div>The robust exoskeleton of beetles, Coleoptera, is believed to have protective advantages, contributing to their evolutionary success. However, empirical evidence of the defensive capabilities of this exoskeleton remains surprisingly scarce. Here, we demonstrate the critical role of the robust beetle exoskeleton in protecting against avian predation. We found that flower chafers (Scarabaeidae, Cetoniinae) have more robust bodies than other scarab species. Laboratory experiments with naïve Japanese quail, <em>Coturnix japonica</em>, revealed that some individuals of intact Cetoniinae survived attacks without serious injury, whereas all individuals of soft scarab species or elytra-removed Cetoniinae were consumed. The survival rate of intact Cetoniinae increased in complex environments because the combination of their stiffness and elliptical shape made it difficult for quail to handle the prey. Field experiments with wild white-cheeked starlings, <em>Sturnus cineraceus</em>, and Eurasian tree sparrows, <em>Passer montanus</em>, demonstrated that most individuals of Cetoniinae species were ignored, whereas soft species were readily preyed upon. Further, when we presented the starlings with the Cetoniinae species <em>Protaetia orientalis</em> that had artificially softened bodies and altered appearance, the starlings readily preyed upon them. This observation suggests that <em>P. orientalis</em> is not chemically defended. Moreover, wild birds can visually discriminate hard species because of prior experience with the unprofitable prey. These results collectively provide evidence that the robust exoskeleton of beetles protects them from predatory attack.</div></div>","PeriodicalId":50788,"journal":{"name":"Animal Behaviour","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571460","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}

{"title":"Differential impact of artificial light at night on cognitive flexibility in visual and spatial reversal learning tasks","authors":"Gaia De Russi ,&nbsp;Giulia Montalbano ,&nbsp;Elia Gatto ,&nbsp;Elena Maggi ,&nbsp;Stefano Cannicci ,&nbsp;Cristiano Bertolucci ,&nbsp;Tyrone Lucon-Xiccato","doi":"10.1016/j.anbehav.2024.10.008","DOIUrl":"10.1016/j.anbehav.2024.10.008","url":null,"abstract":"<div><div>Artificial light at night (ALAN) is a pervasive environmental pollutant with multiple adverse effects on animal biology. As the vertebrate nervous system is particularly sensitive to light effects, this study explores the potential negative impact of ALAN on cognition in adult zebrafish, <em>Danio rerio</em>. Fish from mesocosm populations exposed to either ALAN or control conditions underwent visual and spatial learning tasks, along with an evaluation of cognitive flexibility with visual and spatial reversal learning tasks. Contrary to our initial prediction of a general negative impact, learning performance was not affected by the ALAN treatment. The analysis of reversal learning revealed task-dependent effects on cognitive flexibility: fish exposed to ALAN performed worse than control fish in the visual reversal learning task, but displayed better performance in the spatial reversal learning task. We propose that the influence of ALAN on cognition might differ between different cognitive functions or involve noncognitive factors that play different roles in the testing paradigms. The study underscores the importance of task specificity in nonadaptive cognitive plasticity and calls for ecological assessments to quantify fitness consequences of ALAN in natural settings.</div></div>","PeriodicalId":50788,"journal":{"name":"Animal Behaviour","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571461","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":"Without optimum support: effect of maternal early deprivation on play in semiwild chimpanzees, Pan troglodytes","authors":"Martina Francesconi ,&nbsp;Antonio Lorenzo Loprete ,&nbsp;Veronica Maglieri ,&nbsp;Marina Davila-Ross ,&nbsp;Elisabetta Palagi","doi":"10.1016/j.anbehav.2024.10.016","DOIUrl":"10.1016/j.anbehav.2024.10.016","url":null,"abstract":"<div><div>In mammals, robust connection between mothers and offspring plays pivotal roles in physiological and socioemotional development. Our study investigated the consequences of early maternal deprivation on social play behaviour in immature chimpanzees, examining expected and unexpected findings. In line with the predicted hypothesis, orphaned individuals exhibited lower frequencies of social play than mother-reared chimpanzees, supporting traditional notions of the indispensable role of maternal influence in the correct expression of social behaviours. However, the absence of discernible differences in the variability and roughness of playful patterns, tested for the first time in orphan and mother-reared chimpanzees, suggests that the presence of adult models may not be fundamental for expanding and regulating immature playful behavioural repertoire. Escalation into overt aggression did not differ between orphan and mother-reared chimpanzees, challenging the idea of the crucial role of maternal investment in developing self-restrain abilities during play. Orphans engaged in shorter sessions compared with mother-reared subjects; this strategy is naturally adopted by wild and captive chimpanzees when they need to cope with the risk of escalation during play fighting. Although maternal deprivation has been linked to anxiety-related and depressive behaviours in primates, our results reveal a degree of behavioural resilience in orphans that are still able to adhere to social rules during play, particularly when having contact with their peers. Although play behaviour development can arise from the multifaceted interconnection between early experiences, social dynamics and individual propensity to interact socially, our findings support the view, emerging from a plethora of studies on many social mammals, that play has an irreplaceable role in an individual's life history.</div></div>","PeriodicalId":50788,"journal":{"name":"Animal Behaviour","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571462","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":"Potential signature whistle production by Indo-Pacific humpback dolphins, Sousa chinensis, in the northern South China sea","authors":"Agathe Serres ,&nbsp;Jean-Hugh Thomas ,&nbsp;Lijun Dong ,&nbsp;Shenglan Chen ,&nbsp;Binshuai Liu ,&nbsp;Songhai Li","doi":"10.1016/j.anbehav.2024.10.001","DOIUrl":"10.1016/j.anbehav.2024.10.001","url":null,"abstract":"<div><div>Dolphin communication involves acoustic signals, including whistles, and the well-studied bottlenose dolphins produce individually distinctive whistles called signature whistles (SWs). The production of a potential SW by an injured Indo-Pacific humpback dolphin has been reported, but no study has attempted to validate this finding in this species. Using data collected during encounters with free-ranging Indo-Pacific humpback dolphins at two locations in the northern South China Sea, we investigated the production of SWs by these dolphins. Of the 3846 analysed whistles, 37% were identified as potential SWs (PSWs) using the SIGnature whistle IDentification method and categorized into 82 PSW types. Overall, PSWs were identified during 54% of encounters. Given the high production rate of stereotyped whistles (62% of all whistles in 90% of encounters) compared with the identified PSWs, we suggest that the SIGnature whistle IDentification method criteria cannot be fully adapted for the detection of SWs in Indo-Pacific humpback dolphins, and more research should be conducted to adapt the criteria to the species. In addition, the characteristics of PSWs differed slightly between locations, potentially because of the geographical separation of populations and habitat differences (e.g. noise levels). The present results confirm the production of stereotyped whistles, including PSWs, by Indo-Pacific humpback dolphins. Further research should be conducted to confirm whether these whistles are similar to bottlenose dolphins’ SWs.</div></div>","PeriodicalId":50788,"journal":{"name":"Animal Behaviour","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571463","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}

{"title":"Navigating the night: effects of artificial light on the behaviour of Atlantic puffin fledglings","authors":"Taylor M. Brown ,&nbsp;Sabina I. Wilhelm ,&nbsp;Aaron D. Slepkov ,&nbsp;Kaitlyn Baker ,&nbsp;Gabriela F. Mastromonaco ,&nbsp;Gary Burness","doi":"10.1016/j.anbehav.2024.09.008","DOIUrl":"10.1016/j.anbehav.2024.09.008","url":null,"abstract":"<div><div>Every year in Newfoundland, young Atlantic puffins, <em>Fratercula arctica</em>, departing their nests at night for the first time become stranded in towns near their breeding colonies, a phenomenon thought to be caused by attraction towards artificial light. To test this hypothesis, we conducted three behavioural experiments. First, we illuminated beaches near a breeding colony to determine whether more fledglings would become stranded in illuminated versus dark conditions. Next, we conducted a Y-maze experiment to test stranded fledglings for phototactic behaviour in general and for preferences among high-pressure sodium (HPS), Warm white light-emitting diode (LED), Cool white LED, Blue LED and Orange LED light. Lastly, we quantified activity levels of stranded fledglings in an open field test during exposure to several different light types. We found significantly more fledglings stranded when beaches were illuminated, and fledglings significantly preferred light over darkness in the Y-maze, supporting our hypothesis that Atlantic puffin fledglings become stranded due to light attraction. Fledglings displayed no preferences for certain light types over others in the Y-maze, potentially suggesting that strandings in this species may not be mitigable by changing the streetlight type in stranding-prone towns. Interestingly, fledglings exhibited higher activity levels in darkness and HPS light than in LED light, potentially holding implications for rescue, rehabilitation and husbandry programmes. Overall, our findings demonstrate that the only evidence-based strategy for the reduction of Atlantic puffin strandings is the reduction of coastal artificial lighting; however, further research is needed to determine whether aspects of artificial light besides bulb type may be altered to effectively reduce light attraction in this species.</div></div>","PeriodicalId":50788,"journal":{"name":"Animal Behaviour","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553683","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":"Evaluating indicators of wellbeing in captive grey mouse lemurs, Microcebus murinus, in the context of enrichment","authors":"Juan Pablo Perea-Rodriguez ,&nbsp;Julie Ferreira ,&nbsp;Aude Anzeraey ,&nbsp;Fabienne Aujard ,&nbsp;Caroline Gilbert ,&nbsp;Fabien Pifferi ,&nbsp;Emmanuelle Pouydebat ,&nbsp;Jérémy Terrien ,&nbsp;Audrey Maille","doi":"10.1016/j.anbehav.2024.09.013","DOIUrl":"10.1016/j.anbehav.2024.09.013","url":null,"abstract":"<div><div>Developing and implementing effective approaches to improve the welfare of animals participating in research requires reliable monitoring of their wellbeing. Since wellbeing is a multidimensional state that relates to an individual's physiological, behavioural and psychological/mental health, assessing it requires the use of measures that are both ecologically relevant and species-specific. Grey mouse lemurs are small, nocturnal, arboreal and omnivorous primates and a powerful model for fundamental and translational research. As such, it is important to study the factors that may help predict their wellbeing in captivity. Therefore, we monitored 12 adult mouse lemurs (six females and six males) housed with a same-sex weight-matched cage mate for 5 weeks under standard (Control) levels of environmental enrichment and 12 adults (six females and six males) under relatively High enrichment. We hypothesized that higher structural enrichment would stimulate metabolic energy expenditure, influencing how individuals would respond to a battery of behavioural and physiological measures, especially since their feeding rations remained unchanged throughout the study. We characterized circadian activity, judgement bias, predatory motivation, thermal reactivity to stress and changes in body composition. Generally, mouse lemurs under High enrichment showed more activity and increased predatory motivation and optimism than those in the Control group during daylight. Lemurs under High enrichment also showed increased responses during a stress reactivity test and higher losses in body and fat mass. Principal component analysis identified seven (out of nine) components that explained 96% of the variability in the data. Using a Naïve Bayes classifier algorithm trained with these new principal components, we classified the animals as either from High or Control enrichment levels with 100% accuracy. In summary, by measuring several relevant behavioural and physiological responses to environmental enrichment, we identified a multidimensional effect related to differences in welfare.</div></div>","PeriodicalId":50788,"journal":{"name":"Animal Behaviour","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553682","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":"Social tension in the aftermath of public conflicts: an ethological analysis in humans","authors":"Virginia Pallante ,&nbsp;Ivan Norscia ,&nbsp;Marie Rosenkrantz Lindegaard","doi":"10.1016/j.anbehav.2024.10.003","DOIUrl":"10.1016/j.anbehav.2024.10.003","url":null,"abstract":"<div><div>In social mammals, conflicts are stressful events for the individuals involved. In the postconflict context, it is possible to detect the emotional state of the former opponents through the expression of displacement activities and aggressive behaviours, which indicate an increase in social tension. In humans, stressful events also induce a physiological response that leads to increased social tension behaviours. However, the variation of such behaviours in the postconflict context has never been investigated. Therefore, by conducting a video analysis of street fights recorded by closed-circuit television cameras, we explored the variation in behaviours associated with anxiety, aggression-related anger and other behaviours possibly related to both anxiety and anger (body postures and talking with gestures) in human opponents. We compared the expression of social tension behaviours before and after the eruption of the conflict and found that displacement activities (related to anxiety), aggressive behaviours (related to anger) and talking with gestures (possibly related to anxiety/anger) increased in the postconflict context, but body postures remained unchanged. Moreover, displacement activities and aggressive patterns showed a temporal variation, decreasing within 10 min following the conflict. Finally, the occurrence of anxiety-related behaviours was more sensitive to aggression intensity than anger-related behaviours, indicating that different social tension behaviours rely on different responses that might be separable. Our study highlights the importance of the ethological approach for evaluating postconflict social tension in humans, which shows a variation in its expression as observed in nonhuman primates. Following a similar comparative approach, we encourage further studies to explore the role of social tension in altering postconflict social dynamics.</div></div>","PeriodicalId":50788,"journal":{"name":"Animal Behaviour","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554372","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}