Biology Letters最新文献_第2页

A burrowing annelid from the early Cambrian. 寒武纪早期的一种穴居环带动物。

IF 2.8 2区生物学

Biology Letters Pub Date : 2024-10-01 Epub Date: 2024-10-09 DOI: 10.1098/rsbl.2024.0357

Xiaoyu Yang, M Teresa Aguado, Jie Yang, Christoph Bleidorn

引用次数: 0

Enhancing African coelacanth monitoring using environmental DNA. 利用环境 DNA 加强对非洲腔棘鱼的监测。

IF 2.8 2区生物学

Biology Letters Pub Date : 2024-10-01 Epub Date: 2024-10-23 DOI: 10.1098/rsbl.2024.0415

Jody-Carynn Oliver, Peter Shum, Stefano Mariani, Kerry Jennifer Sink, Ryan Palmer, Gwynneth Felicity Matcher

{"title":"Enhancing African coelacanth monitoring using environmental DNA.","authors":"Jody-Carynn Oliver, Peter Shum, Stefano Mariani, Kerry Jennifer Sink, Ryan Palmer, Gwynneth Felicity Matcher","doi":"10.1098/rsbl.2024.0415","DOIUrl":"https://doi.org/10.1098/rsbl.2024.0415","url":null,"abstract":"Coelacanths are rare, elusive, ancient lobe-finned fish species, residing in poorly accessible tropical marine caves and requiring close monitoring and protection. Environmental DNA (eDNA) approaches are being increasingly applied in the detection of rare and threatened species. Here we devise an eDNA approach to detect the presence of African coelacanths (Latimeria chalumnae) off the eastern coast of South Africa. Novel coelacanth-specific primers were designed to avoid cross-amplification with other fish lineages and validated for specificity. These primers were tested on field samples in conjunction with remotely operated vehicle (ROV) visual surveys. Samples were collected from a known coelacanth habitat and two adjacent slope habitats a few kilometres apart. Coelacanth DNA was detected from three of 15 samples collected. Two of these positive eDNA detections occurred in the presence of coelacanths, as evidenced by ROV footage, while the third positive detection was at a station where coelacanths had not been previously observed. eDNA detections are discussed in relation to the species' metabolic rate, movement patterns and population size, as well as the local oceanographic features. We demonstrate that eDNA can provide a non-invasive method to extend the knowledge of coelacanth distribution ranges and boost research efforts around these iconic fishes.","PeriodicalId":9005,"journal":{"name":"Biology Letters","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11496946/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142494653","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}

引用次数: 0

Stress produces negative judgement bias in cuttlefish. 压力会使墨鱼产生负面的判断偏差。

IF 2.8 2区生物学

Biology Letters Pub Date : 2024-10-01 Epub Date: 2024-10-09 DOI: 10.1098/rsbl.2024.0228

Sarah E Giancola-Detmering, Robyn J Crook

{"title":"Stress produces negative judgement bias in cuttlefish.","authors":"Sarah E Giancola-Detmering, Robyn J Crook","doi":"10.1098/rsbl.2024.0228","DOIUrl":"10.1098/rsbl.2024.0228","url":null,"abstract":"Judgement bias tasks (JBTs) are used to assess the emotional state and welfare of animals in zoos, farms and laboratories, based on the interpretation of an ambiguous or intermediate cue. Animals in positive affective states are more likely to interpret the ambiguous cue positively, whereas animals experiencing negative affect are more likely to interpret ambiguous cues pessimistically. Here, we developed a modified JBT assay for the stumpy-spined cuttlefish, Sepia bandensis, to determine whether cuttlefish exhibit negative affective states resulting from external stressors. Positive and neutral visual cues were presented twice daily until animals learned to associate food with the reinforced visual cue. After training, one treatment group was exposed to combined exposure and handling stress produced by 6 days of impoverished housing and simulated net capture. Our control group received no stress experience. In test trials performed after the stress experience, stressed animals showed higher latencies to approach ambiguous cues, spent significantly less time in rooms with ambiguous cues once they entered, and were less likely to enter first into the ambiguous cue-paired room compared with controls. These behaviours suggest that stress induces pessimistic judgement bias in cuttlefish, the first indication of this capacity in cephalopods.","PeriodicalId":9005,"journal":{"name":"Biology Letters","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11461914/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142387712","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}

引用次数: 0

Genetic and evolutionary divergence of harbour seals (Phoca vitulina) in Iliamna Lake, Alaska. 阿拉斯加伊利亚姆纳湖海豹（Phoca vitulina）的遗传和进化分化。

IF 2.8 2区生物学

Biology Letters Pub Date : 2024-10-01 Epub Date: 2024-10-16 DOI: 10.1098/rsbl.2024.0166

Tatiana Ferrer, Peter Boveng, Donna D W Hauser, David Withrow, Vladimir Burkanov, Thomas P Quinn, Greg O'Corry-Crowe

{"title":"Genetic and evolutionary divergence of harbour seals (Phoca vitulina) in Iliamna Lake, Alaska.","authors":"Tatiana Ferrer, Peter Boveng, Donna D W Hauser, David Withrow, Vladimir Burkanov, Thomas P Quinn, Greg O'Corry-Crowe","doi":"10.1098/rsbl.2024.0166","DOIUrl":"10.1098/rsbl.2024.0166","url":null,"abstract":"Freshwater populations of typically marine species present unique opportunities to investigate biodiversity, evolutionary divergence, and the adaptive potential and niche width of species. A few pinniped species have populations that reside solely in freshwater. The harbour seals inhabiting Iliamna Lake, Alaska constitute one such population. Their remoteness, however, has long hindered scientific inquiry. We used DNA from seal scat and tissue samples provided by Indigenous hunters to screen for mitochondrial DNA and microsatellite variation within Iliamna Lake and eight regions across the Pacific Ocean. The Iliamna seals (i) were substantially and significantly discrete from all other populations ( [Formula: see text]F st-mtDNA = 0.544, [Formula: see text]Φ st - mtDNA = 0.541, [Formula: see text]F st-microsatellites = 0.308), (ii) formed a discrete genetic cluster separate from all marine populations (modal ∆k = 2, PC1 = 14.8%), had (iii) less genetic diversity (Hd, π, H exp), and (iv) higher inbreeding (F) than marine populations. These findings are both striking and unexpected revealing that Iliamna seals have likely been on a separate evolutionary trajectory for some time and may represent a unique evolutionary legacy for the species. Attention must now be given to the selective processes driving evolutionary divergence from harbour seals in marine habitats and to ensuring the future of the Iliamna seal.","PeriodicalId":9005,"journal":{"name":"Biology Letters","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11523099/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142457342","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}

引用次数: 0

Density-dependent dispersal reduces conflict over the sex ratio. 依赖密度的扩散减少了性别比例冲突。

IF 2.8 2区生物学

Biology Letters Pub Date : 2024-10-01 Epub Date: 2024-10-30 DOI: 10.1098/rsbl.2024.0378

Chedhawat Chokechaipaisarn, Andy Gardner

{"title":"Density-dependent dispersal reduces conflict over the sex ratio.","authors":"Chedhawat Chokechaipaisarn, Andy Gardner","doi":"10.1098/rsbl.2024.0378","DOIUrl":"10.1098/rsbl.2024.0378","url":null,"abstract":"Haplodiploids-in particular, wasps-are the workhorses of sex-allocation research. This is owing to their unusual system of sex determination, which provides a ready means of sex ratio adjustment. Notably, their sexually asymmetrical mode of genetic inheritance leads mothers and fathers to come into conflict over the sex ratio of their offspring. In the simplest outbreeding scenario, a mother is favoured to employ an even sex ratio while a father prefers that all his mate's offspring are female. An important modulator of evolutionary conflict between mating partners is genetic relatedness, raising the possibility that this sex ratio conflict is reduced in low-dispersal settings with mating occurring between relatives. However, the impact of population viscosity on sex ratio conflict in haplodiploids remains unknown. Here, we develop and analyse a kin-selection model to investigate how the rate of dispersal modulates sex ratio conflict in a haplodiploid, viscous population setting. We find that population viscosity is associated with a reduction in the extent of sex ratio conflict-the effect being very weak under density-independent dispersal and much stronger under density-dependent dispersal.","PeriodicalId":9005,"journal":{"name":"Biology Letters","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11521607/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142543471","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}

引用次数: 0

Field evidence for the role of plant volatiles induced by caterpillar oral secretion in prey localization by predatory social wasps. 实地证据表明，毛虫口腔分泌物诱导的植物挥发物在捕食性社会黄蜂的猎物定位中发挥了作用。

IF 2.8 2区生物学

Biology Letters Pub Date : 2024-10-01 Epub Date: 2024-10-02 DOI: 10.1098/rsbl.2024.0384

Patrick Grof-Tisza, Ted C J Turlings, Carlos Bustos-Segura, Betty Benrey

{"title":"Field evidence for the role of plant volatiles induced by caterpillar oral secretion in prey localization by predatory social wasps.","authors":"Patrick Grof-Tisza, Ted C J Turlings, Carlos Bustos-Segura, Betty Benrey","doi":"10.1098/rsbl.2024.0384","DOIUrl":"10.1098/rsbl.2024.0384","url":null,"abstract":"One assumed function of herbivore-induced plant volatiles (HIPVs) is to attract natural enemies of the inducing herbivores. Field evidence for this is scarce. In addition, the assumption that elicitors in oral secretions that trigger the volatile emissions are essential for the attraction of natural enemies has not yet been demonstrated under field conditions. After observing predatory social wasps removing caterpillars from maize plants, we hypothesized that these wasps use HIPVs to locate their prey. To test this, we conducted an experiment that simultaneously explored the importance of caterpillar oral secretions in the interaction. Spodoptera caterpillars pinned onto mechanically damaged plants treated with oral secretion were more likely to be attacked by wasps compared with caterpillars on plants that were only mechanically wounded. Both of the latter treatments were considerably more attractive than plants only treated with oral secretion or left untreated. Subsequent analyses of headspace volatiles confirmed differences in emitted volatiles that likely account for the differential predation across treatments. These findings highlight the importance of HIPVs in prey localization by social wasps, hitherto underappreciated potential biocontrol agents and provide evidence for the role that elicitors play in inducing attractive odour blends.","PeriodicalId":9005,"journal":{"name":"Biology Letters","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11444782/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142364295","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}

引用次数: 0

Acorn ant exhibits age-dependent induced defence in response to parasitic raids. 橡子蚁在应对寄生虫突袭时表现出年龄依赖性诱导防御。

IF 2.8 2区生物学

Biology Letters Pub Date : 2024-10-01 Epub Date: 2024-10-16 DOI: 10.1098/rsbl.2024.0335

Phoebe A Koenig, Corrie S Moreau

{"title":"Acorn ant exhibits age-dependent induced defence in response to parasitic raids.","authors":"Phoebe A Koenig, Corrie S Moreau","doi":"10.1098/rsbl.2024.0335","DOIUrl":"10.1098/rsbl.2024.0335","url":null,"abstract":"When risk is unpredictable, organisms may evolve induced defenses, which are activated after an indication of increased risk. In colonies with behavioural specialization, investment in defence may not be uniformly beneficial among group members. Instead, it should depend on the individual's likelihood of participating in defence. The ant Temnothorax longispinosus uses venom to defend against raids by the social parasite Temnothorax americanus. We tested whether T. longispinosus upregulate investment in venom after experiencing a raid, investigating the relationship between venom volume and worker behavioural caste. Overall, raided colonies had more venom per capita than unraided colonies. When divided into behavioural castes, foragers had more venom after experiencing a raid, while nurses did not. These results demonstrate that T. longispinosus have an induced chemical defence against parasitic raids. However, instead of this defence being deployed uniformly among all workers, the induction of the defence depends on the behavioural caste, and therefore age, of the worker, implying that plasticity in venom production increases with age. Since older social insect workers tend to perform riskier tasks, inducibility may align with an increase in expected risk of death, especially if foragers are more likely to defend the colony against parasites than younger workers.","PeriodicalId":9005,"journal":{"name":"Biology Letters","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11523098/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142457341","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}

引用次数: 0

A brief review of non-avian dinosaur biogeography: state-of-the-art and prospectus. 非鸟类恐龙生物地理学简评：现状与展望。

IF 2.8 2区生物学

Biology Letters Pub Date : 2024-10-01 Epub Date: 2024-10-30 DOI: 10.1098/rsbl.2024.0429

Paul Upchurch, Alfio Alessandro Chiarenza

{"title":"A brief review of non-avian dinosaur biogeography: state-of-the-art and prospectus.","authors":"Paul Upchurch, Alfio Alessandro Chiarenza","doi":"10.1098/rsbl.2024.0429","DOIUrl":"10.1098/rsbl.2024.0429","url":null,"abstract":"Dinosaurs potentially originated in the mid-palaeolatitudes of Gondwana 245-235 million years ago (Ma) and may have been restricted to cooler, humid areas by low-latitude arid zones until climatic amelioration made northern dispersals feasible ca 215 Ma. However, this scenario is challenged by new Carnian Laurasian fossils and evidence that even the earliest dinosaurs had adaptations for arid conditions. After becoming globally distributed in the Early-Middle Jurassic (200-160 Ma), dinosaurs experienced vicariance driven by Pangaean fragmentation. Regional extinctions and trans-oceanic dispersals also played a role, and the formation of ephemeral land connections meant that older vicariance patterns were repeatedly overprinted by younger ones, creating a reticulate biogeographic history. Palaeoclimates shaped dispersal barriers and corridors, including filters that had differential effects on different types of dinosaurs. Dinosaurian biogeographic research faces many challenges, not the least of which is the patchiness of the fossil record. However, new fossils, extensive databasing and improved analytical methods help distinguish signal from noise and generate fresh perspectives. In the future, developing techniques for quantifying and ameliorating sampling biases and modelling the dispersal capacities of dinosaurs are likely to be two of the key components in our modern research programme.","PeriodicalId":9005,"journal":{"name":"Biology Letters","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11529633/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142543470","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}

引用次数: 0

Host genetic diversity and body condition influence parasite resistance and clearance in a wild marine mammal population. 宿主基因多样性和身体状况影响野生海洋哺乳动物种群的寄生虫抵抗力和清除率。

IF 2.8 2区生物学

Biology Letters Pub Date : 2024-10-01 Epub Date: 2024-10-02 DOI: 10.1098/rsbl.2024.0302

Josefina Gutiérrez, Mauricio Seguel, Pablo Saenz-Agudelo, Gerardo Acosta-Jamett, Claudio Verdugo

{"title":"Host genetic diversity and body condition influence parasite resistance and clearance in a wild marine mammal population.","authors":"Josefina Gutiérrez, Mauricio Seguel, Pablo Saenz-Agudelo, Gerardo Acosta-Jamett, Claudio Verdugo","doi":"10.1098/rsbl.2024.0302","DOIUrl":"10.1098/rsbl.2024.0302","url":null,"abstract":"Host genetic variability can modulate infection resistance, although its role in infection clearance remains unclear. Hookworm disease (Uncinaria sp.) is the leading cause of pup mortality in several otariid species, although the parasite can be cleared through immune-mediated processes. We evaluated the association of host genetic diversity, body condition and immune response with hookworm resistance and/or clearance in the South American fur seal (Arctocephalus australis). Uninfected pups had higher heterozygosity than parasitized individuals, indicating a negative relationship between heterozygosity and the chances of infection. Likewise, pups that died of hookworm infection had lower heterozygosity than those that died of non-infectious causes. Interestingly, once infected, pups that survived hookworm infection had heterozygosities similar to pups that died of hookworm disease. However, pups that cleared the infection had a higher body mass and parasite-specific immunoglobulin G levels than those that did not recover or died of hookworm disease. Thus, although heterozygosity predicted resistance to and mortality from hookworm infections, it did not affect parasite clearance, which was facilitated by better body condition and adaptive immune responses. This demonstrates that host genetic variability and host-environment interactions influence disease dynamics, acting at different, well-defined stages of infection.","PeriodicalId":9005,"journal":{"name":"Biology Letters","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11444764/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142364296","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}

引用次数: 0

Ultradian rhythms of activity in a wild subterranean rodent. 一种野生地下啮齿动物的超昼夜活动节律。

IF 2.8 2区生物学

Biology Letters Pub Date : 2024-10-01 Epub Date: 2024-10-23 DOI: 10.1098/rsbl.2024.0401

Kyle T Finn, Otto Brede, Nigel C Bennett, Markus Zöttl

{"title":"Ultradian rhythms of activity in a wild subterranean rodent.","authors":"Kyle T Finn, Otto Brede, Nigel C Bennett, Markus Zöttl","doi":"10.1098/rsbl.2024.0401","DOIUrl":"https://doi.org/10.1098/rsbl.2024.0401","url":null,"abstract":"Many animals adapt their activity patterns to the best environmental conditions using daily rhythms. African mole-rats are among the mammals that have become models for studying how these rhythms can be entrained by light or temperature in experimental laboratory studies. However, it is unclear whether they exhibit similar circadian rhythms in their natural lightless, subterranean environment. In this study, we used biologging to investigate the activity rhythms of wild, highveld mole-rats. We show that their activity cycle exhibited an ultradian rhythm with a length between 4 and 8 h. On an individual level, mole-rats displayed about five activity bouts per day, occurring at various times during the day and night. On a population level, activity peaked in the afternoon, coinciding with the peak in ambient temperature. Our research suggests that wild subterranean mammals, which experience reduced environmental variation, are unlikely to show clear circadian rhythmicity in activity patterns. Instead, activity periods are distributed over several bouts throughout the day and night, and activity coincides with the peak in daily temperature. We propose that ultradian rhythms in activity may be more common than previously thought and discuss how physiological processes may generate differences in periodicity between laboratory and wild populations.","PeriodicalId":9005,"journal":{"name":"Biology Letters","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11496949/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142494600","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}

引用次数: 0