Biology Letters最新文献_第7页

Seasonal variation in arthropod prey as a driver of elevational migration by montane birds. 节肢动物猎物的季节变化是山地鸟类海拔迁移的驱动因素。

IF 3 2区生物学

Biology Letters Pub Date : 2026-06-03 DOI: 10.1098/rsbl.2025.0797

Tarun Menon, Ritobroto Chanda, Shambu Rai, Mangal Rai, Binod Munda, Dambar Kumar Pradhan, Bharat Tamang, Aman Biswakarma, Umesh Srinivasan

{"title":"Seasonal variation in arthropod prey as a driver of elevational migration by montane birds.","authors":"Tarun Menon, Ritobroto Chanda, Shambu Rai, Mangal Rai, Binod Munda, Dambar Kumar Pradhan, Bharat Tamang, Aman Biswakarma, Umesh Srinivasan","doi":"10.1098/rsbl.2025.0797","DOIUrl":"10.1098/rsbl.2025.0797","url":null,"abstract":"Elevational migration is a common avian strategy to deal with seasonality in montane environments. Arthropods are an important food source for a majority of the world's birds and are also highly sensitive to temperature. In mountains, where most terrestrial bird diversity is concentrated, arthropod abundance is likely to vary with both elevation and season, potentially influencing elevational migration through resource tracking. We sampled arthropods and birds in summer and winter across a 2300 metre forested elevation gradient in the hyperdiverse eastern Himalayas. In summer, aerial and terrestrial arthropod abundance was positively correlated with elevation but declined with increasing elevation in winter. Foliage arthropod abundance declined with elevation in both seasons but with little seasonal variation in abundance. Sallying and terrestrial-gleaning insectivore abundance increased with elevation in summer and declined in winter. The seasonal movements of these species correlate with fluctuations in prey abundance, potentially indicating that they migrate elevationally to track arthropod availability. In contrast, leaf-gleaning insectivore abundance did not vary seasonally with elevation; these species are largely resident which likely feed on seasonally stable abundances of foliage arthropods, obviating the need for migration. These patterns are consistent with the hypothesis that food availability influences the movement strategies of avian insectivores.","PeriodicalId":9005,"journal":{"name":"Biology Letters","volume":"22 6","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148148494","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}

引用次数: 0

Using sound to detect Formica rufa behavioural changes to a common pesticide. 利用声音来检测红木对一种常见杀虫剂的行为变化。

IF 3 2区生物学

Biology Letters Pub Date : 2026-06-03 DOI: 10.1098/rsbl.2026.0087

Louise Vang Sørensen, Natalia Sandoval, Erin S McCallum, Saul Rodriguez-Martinez, Sara Keen, Jerker Fick, Åsa M M Berglund, Mario Rollo, Jonatan Klaminder

{"title":"Using sound to detect Formica rufa behavioural changes to a common pesticide.","authors":"Louise Vang Sørensen, Natalia Sandoval, Erin S McCallum, Saul Rodriguez-Martinez, Sara Keen, Jerker Fick, Åsa M M Berglund, Mario Rollo, Jonatan Klaminder","doi":"10.1098/rsbl.2026.0087","DOIUrl":"10.1098/rsbl.2026.0087","url":null,"abstract":"Soil-dwelling insects may be at particularly high risk of exposure to pesticides because soils are a major recipient of these chemicals. Still, we lack non-invasive techniques to detect in situ responses of soil macrofauna to pesticides and other contaminants. Here, we test if sound recordings can reveal sub-lethal behavioural shifts in ant colonies caused by a neonicotinoid (imidacloprid). We demonstrate that an acoustic variable can detect pesticide-induced shifts in outdoor behaviours (increased activity) of red wood ants (Formica rufa). This behaviour shift was observed at environmentally relevant, sub-lethal levels of imidacloprid (10.8 ± 5.7 ng g-1 sample, average ± standard error). Notably, our recordings revealed a short-term (<6 h) increase in activity induced by the pesticide, followed by a slow recovery and a return to the baseline over a weekly timescale. The long-term sub-lethal behavioural effects would have been difficult to detect using other techniques, given the opaque nature of the studied mounds. We conclude that acoustic monitoring offers a promising tool for detecting pesticide effects in natural settings. We also provide recommendations for best practices for acoustic monitoring of soil fauna and discuss the challenges of measuring soil fauna behavioural changes in a natural setting.","PeriodicalId":9005,"journal":{"name":"Biology Letters","volume":"22 6","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148148534","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}

引用次数: 0

Streaming for fish? Screen-based social exposure disrupts brain development. 垂钓鱼？基于屏幕的社交接触会扰乱大脑发育。

IF 3 2区生物学

Biology Letters Pub Date : 2026-06-03 DOI: 10.1098/rsbl.2025.0830

Olivia Carmstedt, Mirjam Amcoff, Gilles De Meester, Javier Pinto, John L Fitzpatrick, Rike Stelkens, Judith E Mank, Niclas Kolm

{"title":"Streaming for fish? Screen-based social exposure disrupts brain development.","authors":"Olivia Carmstedt, Mirjam Amcoff, Gilles De Meester, Javier Pinto, John L Fitzpatrick, Rike Stelkens, Judith E Mank, Niclas Kolm","doi":"10.1098/rsbl.2025.0830","DOIUrl":"10.1098/rsbl.2025.0830","url":null,"abstract":"Social interactions form key developmental cues for plasticity in the vertebrate brain. However, few experimental studies disentangle specific aspects of sociality, such as social interactivity, in this context. Here we tested the role of social interactivity in shaping brain development in juvenile guppies (Poecilia reticulata), a social species with high potential for post-birth neuroplasticity. Fish were reared under one of three conditions: (i) interactive live social exposure to conspecifics, (ii) non-interactive screen-based social exposure to prerecorded conspecifics or (iii) minimal social exposure. We then put them through a cognitive task (object permanence), followed by quantification of brain size and brain region size to assess cognitive and morphological plasticity. There were no effects on object permanence performance, but individuals reared under interactive live social exposure had significantly larger relative brain size and relative olfactory bulb size than those reared under non-interactive screen-based social exposure, which were similar to individuals reared under minimal social exposure. These results suggest that interactive live social exposure increases brain size and highlight interactivity as a driver of neural development.","PeriodicalId":9005,"journal":{"name":"Biology Letters","volume":"22 6","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148148562","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}

引用次数: 0

An introduced parasitoid enables host range expansion of a resident parasitoid. 引进寄生蜂可使寄主寄生蜂的寄主范围扩大。

IF 2.7 2区生物学

Biology Letters Pub Date : 2026-05-27 DOI: 10.1098/rsbl.2025.0851

Jessie Moon, Jessica L Fraser, Paul K Abram

{"title":"An introduced parasitoid enables host range expansion of a resident parasitoid.","authors":"Jessie Moon, Jessica L Fraser, Paul K Abram","doi":"10.1098/rsbl.2025.0851","DOIUrl":"10.1098/rsbl.2025.0851","url":null,"abstract":"Native consumers can behave maladaptively towards invasive species, with evolution of behavioural or physiological traits thought to be the main way out of these 'evolutionary traps'. However, shorter term ecological processes resulting from biological invasions could provide other ways to escape evolutionary traps. Asobara cf. rufescens, a resident (i.e. possibly native or previously introduced) parasitoid of drosophilid fly larvae in North America, can rarely produce offspring on the invasive fruit pest Drosophila suzukii in the laboratory, but often emerges from field-collected D. suzukii. We hypothesized that the successful development of the resident parasitoid in the invasive host in the field is made possible by Leptopilina japonica, a recently introduced parasitoid of D. suzukii. In laboratory experiments, we found that the resident parasitoid had more than 30-fold higher offspring emergence in the invasive host when the recently introduced parasitoid was also present. The resident parasitoid was only able to develop when it parasitized the host after the introduced parasitoid, possibly because the introduced parasitoid destroyed the hosts' cellular immunity. The introduced consumer thus enabled a resident consumer to expand its host range to include the invasive host species, rescuing it from an evolutionary trap.","PeriodicalId":9005,"journal":{"name":"Biology Letters","volume":"22 5","pages":""},"PeriodicalIF":2.7,"publicationDate":"2026-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148026961","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}

引用次数: 0

Multiple resampled genomic matrices provide mixed support for arachnid monophyly. 多个重采样的基因组矩阵为蛛形动物单系性提供了混合支持。

IF 2.7 2区生物学

Biology Letters Pub Date : 2026-05-27 DOI: 10.1098/rsbl.2025.0734

Marc Domènech, Mattia Giacomelli, Inés Galán-Luque, Javier Arañó-Ansola, Philip C J Donoghue, Davide Pisani, Jesus Lozano-Fernandez

{"title":"Multiple resampled genomic matrices provide mixed support for arachnid monophyly.","authors":"Marc Domènech, Mattia Giacomelli, Inés Galán-Luque, Javier Arañó-Ansola, Philip C J Donoghue, Davide Pisani, Jesus Lozano-Fernandez","doi":"10.1098/rsbl.2025.0734","DOIUrl":"10.1098/rsbl.2025.0734","url":null,"abstract":"Genome assemblies for thousands of species make a resolved tree of life achievable, though this goal is hindered by computational burden and poor modelling of large datasets. We have developed an approach to systematically identify robust and challenging nodes in ancient phylogenies using multi-protein, clade-specific matrices containing different taxa and different genes. In each matrix, we include one randomly selected species for each of the major clades, infer single-copy orthologues, and analyse the resulting concatenated supermatrices using mixture models. We assess node support for competing topologies under different strategies, such as removing distant relatives and recoding, using amino acid and nucleotide data. We applied this approach to chelicerates, a group with an unresolved phylogeny in which the position of marine horseshoe crabs as the sister of arachnids is contentious. Furthermore, we also analysed two other ancient animal clades: molluscs and vertebrates, as examples of better resolved groups. While their phylogenies show stable support, chelicerate phylogenies are method and dataset-dependent. Our results suggest that, despite varying levels of support for alternative hypotheses, the evolutionary history of chelicerates remains unresolved even with the genomic data currently available.","PeriodicalId":9005,"journal":{"name":"Biology Letters","volume":"22 5","pages":""},"PeriodicalIF":2.7,"publicationDate":"2026-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148026908","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}

引用次数: 0

Increased neural activity in the bed nucleus of the stria terminalis of uninfected canaries after observation of infected conspecifics. 未感染金丝雀尾纹床核的神经活动增加。

IF 2.7 2区生物学

Biology Letters Pub Date : 2026-05-27 DOI: 10.1098/rsbl.2026.0043

Madeleine Chang, Sophia Santangelo, Devon Comito, Bennett Hardy, Patricia C Lopes

引用次数: 0

Stepwise loss of complexity in hagfish eyes prior to deep sea colonization. 盲鳗在深海定居前眼睛的复杂性逐步丧失。

IF 2.7 2区生物学

Biology Letters Pub Date : 2026-05-27 DOI: 10.1098/rsbl.2026.0127

Victoria E McCoy, Jason D Pardo, Arjan Mann, Andrew Young, René Lauer, Bruce Lauer, Tetsuto Miyashita

引用次数: 0

Injured mother bugs compensate for reduced provisioning ability by increasing trophic egg production. 受伤的雌虫通过增加营养性产卵来补偿供给能力的降低。

IF 2.7 2区生物学

Biology Letters Pub Date : 2026-05-27 DOI: 10.1098/rsbl.2026.0099

Hiromi Mukai, Mantaro Hironaka, Narumi Baba, Shin-Ichi Kudo

{"title":"Injured mother bugs compensate for reduced provisioning ability by increasing trophic egg production.","authors":"Hiromi Mukai, Mantaro Hironaka, Narumi Baba, Shin-Ichi Kudo","doi":"10.1098/rsbl.2026.0099","DOIUrl":"10.1098/rsbl.2026.0099","url":null,"abstract":"In the burrower bug Adomerus triguttulus, females exhibit parental care, including provisioning of trophic eggs and nutlets of Lamium spp. Trophic eggs are deposited on egg clutches during egg care and are consumed by nymphs soon after hatching. After hatching, females progressively deliver nutlets into nests harbouring the nymphs. Females sometimes sustain injuries before oviposition, possibly due to predator attacks. Such non-lethal injuries may result in reduced nutlet provisioning ability or reduced residual reproductive value and may thus induce adaptive changes in trophic egg production. To test the hypothesis of increased trophic egg production as compensation for decreased nutlet-provisioning ability or as terminal investment triggered by injury, females were divided into three experimental groups: hind-leg removal, forewing removal and control (no injury) groups. Females in the hind-leg removal group produced more trophic eggs than those in both the forewing removal and control groups, which did not differ from each other. The nutlet-carrying speed of females in the hind-leg removal group was lower than those of females in the forewing removal and control groups. These results suggest that females that have lost a leg compensate for their decreased provisioning ability by increasing trophic egg production.","PeriodicalId":9005,"journal":{"name":"Biology Letters","volume":"22 5","pages":""},"PeriodicalIF":2.7,"publicationDate":"2026-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148026979","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}

引用次数: 0

Antidepressant exposure suppresses boldness and behavioural individuality across social contexts in fish. 抗抑郁药暴露会抑制鱼类在社会环境中的胆大和行为个性。

IF 2.7 2区生物学

Biology Letters Pub Date : 2026-05-27 DOI: 10.1098/rsbl.2025.0764

Raiko Rafeeq, Upama Aich, Minna Saaristo, Bob B M Wong

{"title":"Antidepressant exposure suppresses boldness and behavioural individuality across social contexts in fish.","authors":"Raiko Rafeeq, Upama Aich, Minna Saaristo, Bob B M Wong","doi":"10.1098/rsbl.2025.0764","DOIUrl":"10.1098/rsbl.2025.0764","url":null,"abstract":"Psychoactive pharmaceuticals have been increasingly detected across the environment worldwide. Alarmingly, these pollutants disrupt ecologically important behaviours in exposed wildlife, both at the population-level and individual-level. Individual-level responses, such as the differences between individuals (i.e. behavioural individuality), are a key facilitator of population resilience and adaptive potential. Nevertheless, the effects of pharmaceutical exposure on behavioural individuality across social contexts are currently poorly understood. To address this, we investigated whether a 21-day exposure to an environmentally realistic level (1 µg l-1) of a ubiquitous pollutant, the antidepressant venlafaxine, caused population- and individual-level behavioural responses in juvenile southern pygmy perch (Nannoperca australis), when tested individually and in the presence of a conspecific. We found that, in the presence of another fish, exposed individuals were less exploratory than controls, but this effect was not observed while in social isolation. Moreover, exposed fish differed less from each other (i.e. lower behavioural individuality) in their activity in the individual trials and their exploration in the paired trials. Lastly, venlafaxine also reduced body condition in exposed fish. Our findings suggest that psychoactive pharmaceuticals can alter body condition and behaviour across ecologically relevant contexts, with potential implications for the adaptive capacity and population resilience of exposed wildlife.","PeriodicalId":9005,"journal":{"name":"Biology Letters","volume":"22 5","pages":""},"PeriodicalIF":2.7,"publicationDate":"2026-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148026901","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}

引用次数: 0

Hot days increase the risk of heat-stress-related deaths in endangered koala populations. 炎热的天气增加了濒危考拉因热应激而死亡的风险。

IF 3 2区生物学

Biology Letters Pub Date : 2026-05-27 DOI: 10.1098/rsbl.2026.0117

Valentina S A Mella, Mark B Krockenberger, Geoffrey G Morgan, Joy S Tripovich, Edward Jegasothy

{"title":"Hot days increase the risk of heat-stress-related deaths in endangered koala populations.","authors":"Valentina S A Mella, Mark B Krockenberger, Geoffrey G Morgan, Joy S Tripovich, Edward Jegasothy","doi":"10.1098/rsbl.2026.0117","DOIUrl":"10.1098/rsbl.2026.0117","url":null,"abstract":"Heat exposure has been recognized as an increasingly important driver of wildlife vulnerability worldwide, making it essential to understand how rising temperatures affect species with limited physiological flexibility. We used a case-crossover analytical framework from environmental epidemiology to evaluate the association between ambient temperature and koala admission into care and mortality across New South Wales, Australia. We examined 11 862 koala rescue admissions recorded between 2000 and 2022. Risk of admission and mortality for adult koalas increased once the 7-day average maximum daily temperature exceeded 27°C, with risk continuing to rise at higher temperatures. Exposure above 30°C increased the odds of admission or death 1.5-3.5 times compared with individuals exposed to 25°C. Mapping heat-related risk indicated that inland north-west populations face the greatest exposure to high temperatures. We list intervention guidelines to support prevention, preparedness and response in high-risk regions. Our results highlight how even moderate temperature increases can elevate mortality risk in a thermally sensitive mammal, underscoring the need to identify and mitigate heat-related threats for wildlife as climates continue to warm. We adapted a technique used in human health to wildlife veterinary admission data and provided a novel framework for quantifying the impacts of extreme heat on vulnerable free-ranging populations.","PeriodicalId":9005,"journal":{"name":"Biology Letters","volume":"22 5","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148026939","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}

引用次数: 0