Biology Letters最新文献_第3页

Evidence for inbreeding depression in captive Damaraland mole-rats. 人工饲养的达马拉兰鼹鼠近亲繁殖抑制的证据。

IF 2.8 2区生物学

Biology Letters Pub Date : 2024-10-01 Epub Date: 2024-10-30 DOI: 10.1098/rsbl.2024.0407

David Seager, Amy E Leedale, Jack Benjamin Thorley, Philippe Vullioud, Markus Zöttl, Tim Clutton-Brock

{"title":"Evidence for inbreeding depression in captive Damaraland mole-rats.","authors":"David Seager, Amy E Leedale, Jack Benjamin Thorley, Philippe Vullioud, Markus Zöttl, Tim Clutton-Brock","doi":"10.1098/rsbl.2024.0407","DOIUrl":"10.1098/rsbl.2024.0407","url":null,"abstract":"Mating between closely related individuals can result in a reduction in offspring fitness, known as inbreeding depression. Here, we investigate whether breeding with close relatives affects the reproductive output of parents and the development of their offspring in Damaraland mole-rats (Fukomys damarensis), a cooperatively breeding species where females avoid mating with familiar individuals. By cross-fostering litters of pups soon after birth, we were able to form breeding pairs from full siblings that were reared apart. We compared the reproductive output of these sibling pairs and the survival and growth of their pups with that of unrelated pairs over a period of 4 years. The litter sizes and interbirth intervals of sibling pairs did not differ from those of unrelated pairs, but the growth and survival of inbred offspring were lower, showing that breeding between close relatives is associated with substantial fitness costs. This study suggests that inbreeding depression is an important driver of the extreme reproductive skew observed in social mole-rats. Studies of the costs of inbred matings are now needed in similar species, such as naked mole-rats (Heterocephalus glaber), where captive females more commonly breed with close relatives, to determine whether these costs are lower than in Damaraland mole-rats.","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/PMC11521613/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142543472","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

Molecular correlates of swarming behaviour in Aedes aegypti males. 埃及伊蚊雄虫成群行为的分子相关性。

IF 2.8 2区生物学

Biology Letters Pub Date : 2024-10-01 Epub Date: 2024-10-30 DOI: 10.1098/rsbl.2024.0245

Julien Devilliers, Hollie Marshall, Ben Warren, Charalambos P Kyriacou, Luciana O Araripe, Rafaela V Bruno, Ezio Rosato, Roberto Feuda

{"title":"Molecular correlates of swarming behaviour in Aedes aegypti males.","authors":"Julien Devilliers, Hollie Marshall, Ben Warren, Charalambos P Kyriacou, Luciana O Araripe, Rafaela V Bruno, Ezio Rosato, Roberto Feuda","doi":"10.1098/rsbl.2024.0245","DOIUrl":"10.1098/rsbl.2024.0245","url":null,"abstract":"Mosquitoes are the deadliest vectors of diseases. They impose a huge health burden on human populations spreading parasites as disparate as protozoans (malaria), viruses (yellow fever and more) and nematodes (filariasis) that cause life-threatening conditions. In recent years, mating has been proposed as a putative target for population control. Mosquitoes mate mid-air, in swarms initiated by males and triggered by a combination of internal and external stimuli. As the number of females in a swarm is limited, there is intense competition among males, and they 'retune' their physiology for this demanding behaviour. There is limited knowledge on the 'genetic reprogramming' required to enable swarming. Interestingly, recent evidence indicates that the upregulation of circadian clock genes may be involved in the swarming of malaria mosquitoes of the genus Anopheles. Here, we use whole-head RNA-seq to identify gene expression changes in Aedes aegypti males that are engaged in swarming in a laboratory setting. Our results suggest that in preparation to swarming, males tend to lower some housekeeping functions while increasing remodelling of the cytoskeleton and neuronal connectivity; the transcription of circadian clock genes is unaffected.","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/PMC11521606/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142543473","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

Weighting of sensory cues reflect changing patterns of visual investment during ecological divergence in Heliconius butterflies. 感觉线索的权重反映了 Heliconius 蝴蝶生态分化过程中视觉投资模式的变化。

IF 2.8 2区生物学

Biology Letters Pub Date : 2024-10-01 Epub Date: 2024-10-23 DOI: 10.1098/rsbl.2024.0377

José Borrero, Elisa Mogollon Perez, Daniel Shane Wright, Daniela Lozano-Urrego, Geraldine Rueda-Muñoz, Carolina Pardo-Diaz, Camilo Salazar, Stephen H Montgomery, Richard M Merrill

{"title":"Weighting of sensory cues reflect changing patterns of visual investment during ecological divergence in Heliconius butterflies.","authors":"José Borrero, Elisa Mogollon Perez, Daniel Shane Wright, Daniela Lozano-Urrego, Geraldine Rueda-Muñoz, Carolina Pardo-Diaz, Camilo Salazar, Stephen H Montgomery, Richard M Merrill","doi":"10.1098/rsbl.2024.0377","DOIUrl":"https://doi.org/10.1098/rsbl.2024.0377","url":null,"abstract":"Integrating information across sensory modalities enables animals to orchestrate a wide range of complex behaviours. The relative importance placed on one sensory modality over another reflects the reliability of cues in a particular environment and corresponding differences in neural investment. As populations diverge across environmental gradients, the reliability of sensory cues may shift, favouring divergence in neural investment and the weight given to different sensory modalities. During their divergence across closed-forest and forest-edge habitats, closely related butterflies Heliconius cydno and Heliconius melpomene evolved distinct brain morphologies, with the former investing more in vision. Quantitative genetic analyses suggest that selection drove these changes, but their behavioural consequences remain uncertain. We hypothesized that divergent neural investment may alter sensory weighting. We trained individuals in an associative learning experiment using multimodal colour and odour cues. When positively rewarded stimuli were presented in conflict, i.e. pairing positively trained colour with negatively trained odour and vice versa, H. cydno favoured visual cues more strongly than H. melpomene. Hence, differences in sensory weighting may evolve early during divergence and are predicted by patterns of neural investment. These findings, alongside other examples, imply that differences in sensory weighting stem from divergent investment as adaptations to local sensory environments.","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/PMC11496948/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142494602","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

Addictive manipulation: a perspective on the role of reproductive parasitism in the evolution of bacteria-eukaryote symbioses. 上瘾的操纵：从生殖寄生在细菌-真核共生进化中的作用的角度。

IF 3.3 2区生物学

Biology Letters Pub Date : 2024-09-18 DOI: 10.1098/rsbl.2024.0310

Michele Castelli,Tiago Nardi,Michele Giovannini,Davide Sassera

{"title":"Addictive manipulation: a perspective on the role of reproductive parasitism in the evolution of bacteria-eukaryote symbioses.","authors":"Michele Castelli,Tiago Nardi,Michele Giovannini,Davide Sassera","doi":"10.1098/rsbl.2024.0310","DOIUrl":"https://doi.org/10.1098/rsbl.2024.0310","url":null,"abstract":"Wolbachia bacteria encompass noteworthy reproductive manipulators of their arthropod hosts. which influence host reproduction to favour their own transmission, also exploiting toxin-antitoxin systems. Recently, multiple other bacterial symbionts of arthropods have been shown to display comparable manipulative capabilities. Here, we wonder whether such phenomena are truly restricted to arthropod hosts. We focused on protists, primary models for evolutionary investigations on eukaryotes due to their diversity and antiquity, but still overall under-investigated. After a thorough re-examination of the literature on bacterial-protist interactions with this question in mind, we conclude that such bacterial 'addictive manipulators' of protists do exist, are probably widespread, and have been overlooked until now as a consequence of the fact that investigations are commonly host-centred, thus ineffective to detect such behaviour. Additionally, we posit that toxin-antitoxin systems are crucial in these phenomena of addictive manipulation of protists, as a result of recurrent evolutionary repurposing. This indicates intriguing functional analogy and molecular homology with plasmid-bacterial interplays. Finally, we remark that multiple addictive manipulators are affiliated with specific bacterial lineages with ancient associations with diverse eukaryotes. This suggests a possible role of addictive manipulation of protists in paving the way to the evolution of bacteria associated with multicellular organisms.","PeriodicalId":9005,"journal":{"name":"Biology Letters","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142264571","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

Are agricultural commodity production systems at risk from local biodiversity loss? 农业商品生产系统是否面临当地生物多样性丧失的风险？

IF 3.3 2区生物学

Biology Letters Pub Date : 2024-09-18 DOI: 10.1098/rsbl.2024.0283

Calum Maney,Marieke Sassen,Ken E Giller

{"title":"Are agricultural commodity production systems at risk from local biodiversity loss?","authors":"Calum Maney,Marieke Sassen,Ken E Giller","doi":"10.1098/rsbl.2024.0283","DOIUrl":"https://doi.org/10.1098/rsbl.2024.0283","url":null,"abstract":"Compelling evidence for feedbacks between commodity crop production systems and local ecosystems has led to predictions that biodiversity loss could threaten food security. However, for this to happen agricultural production systems must both impact and depend on the same components of biodiversity. Here, we review the evidence for and against the simultaneous impacts and dependencies of eight important commodity crops on biodiversity. We evaluate the risk that pollination, pest control or biodiversity-mediated soil health maintenance services are at risk from local biodiversity loss. We find that for key species groups such as ants, bees and birds, the production of commodities including coffee, cocoa and soya bean is indeed likely to be at risk from local biodiversity loss. However, we also identify several combinations of commodity, ecosystem service and component of biodiversity that are unlikely to lead to reinforcing feedbacks and lose-lose outcomes for biodiversity and agriculture. Furthermore, there are significant gaps in the evidence both for and against a mutualism between biodiversity and agricultural commodity production, highlighting the need for more evaluation of the importance of specific biodiversity groups to agricultural systems globally.","PeriodicalId":9005,"journal":{"name":"Biology Letters","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142264570","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

Tactile bill-tip organs in seabirds suggest conservation of a deep avian symplesiomorphy. 海鸟的触觉喙尖器官表明一种深层鸟类共形现象得以保存。

IF 3.3 2区生物学

Biology Letters Pub Date : 2024-09-18 DOI: 10.1098/rsbl.2024.0259

Carla J du Toit,Alexander L Bond,Susan J Cunningham,Daniel J Field,Steven J Portugal

{"title":"Tactile bill-tip organs in seabirds suggest conservation of a deep avian symplesiomorphy.","authors":"Carla J du Toit,Alexander L Bond,Susan J Cunningham,Daniel J Field,Steven J Portugal","doi":"10.1098/rsbl.2024.0259","DOIUrl":"https://doi.org/10.1098/rsbl.2024.0259","url":null,"abstract":"Birds' bills are their main tactile interface with the outside world. Tactile bill-tip organs associated with specialized foraging techniques are present in several bird groups, yet remain understudied in most clades. One example is Austrodyptornithes, the major seabird clade uniting Procellariiformes (albatrosses and petrels) and Sphenisciformes (penguins). Here, we describe the mechanoreceptor arrangement and neurovascular anatomy in the premaxillae of Austrodyptornithes. Using a wide phylogenetic sample of extant birds (361 species), we show that albatrosses and penguins exhibit complex tactile bill-tip anatomies, comparable to birds with known bill-tip organs, despite not being known to use tactile foraging. Petrels (Procellariidae, Hydrobatidae and Oceanitidae) lack these morphologies, indicating an evolutionary transition in bill-tip mechanosensitivity within Procellariiformes. The bill-tip organ in Austrodyptornithes may be functionally related to nocturnal foraging and prey detection under water, or courtship displays involving tactile stimulation of the bill. Alternatively, these organs may be vestigial as is likely the case in most palaeognaths (e.g. ostriches and emu). Ancestral state reconstructions fail to reject the hypothesis that the last common ancestor of Austrodyptornithes had a bill-tip organ; thus, tactile foraging may be ancestral for this major extant clade, perhaps retained from a deeper point in crown bird evolutionary history.","PeriodicalId":9005,"journal":{"name":"Biology Letters","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142264625","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

Supersize me: hypotheses on torpor-assisted prehibernation fattening in a boreal bat. 超大的我：北方蝙蝠冬眠前增肥的假说。

IF 3.3 2区生物学

Biology Letters Pub Date : 2024-09-18 DOI: 10.1098/rsbl.2024.0291

Mari A Fjelldal,Niclas R Fritzén,Kati M Suominen,Thomas M Lilley

{"title":"Supersize me: hypotheses on torpor-assisted prehibernation fattening in a boreal bat.","authors":"Mari A Fjelldal,Niclas R Fritzén,Kati M Suominen,Thomas M Lilley","doi":"10.1098/rsbl.2024.0291","DOIUrl":"https://doi.org/10.1098/rsbl.2024.0291","url":null,"abstract":"Hibernators face an energetic dilemma in the autumn at northern latitudes; while temperatures and food availability decrease, hibernating species need to build fat deposits to survive the winter. During this critical fattening phase, insectivorous boreal bats use torpor to build and conserve their reserves. However, we still know little about temporal variability in torpor use employed by bats during the prehibernation fattening period and how decreasing temperatures and food availability in combination with increasing individual body mass impact this. Here, we present two general hypotheses for explaining temporal torpor patterns observed in a boreal bat (Eptesicus nilssonii), in which torpor use (i) facilitates rapid mass gain or (ii) conserves stored body mass. Although temporally separated in our dataset, data on temperature, insect abundance and body mass throughout the prehibernation period indicate that E. nilssonii reaches the majority of its overwintering mass before the onset of increasing daytime and night-time torpor use. In combination with low food availability by this point in time, these observations suggest torpor expression may be intended to conserve gained reserves rather than facilitate mass gain. Our study is intended as a first proof of concept for disentangling temporal drivers of torpor in bats during the prehibernation fattening phase.","PeriodicalId":9005,"journal":{"name":"Biology Letters","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142264481","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

Novel rebreathing adaptation extends dive time in a semi-aquatic lizard. 新颖的再呼吸适应性延长了半水栖蜥蜴的潜水时间。

IF 3.3 2区生物学

Biology Letters Pub Date : 2024-09-18 DOI: 10.1098/rsbl.2024.0371

Lindsey Swierk

{"title":"Novel rebreathing adaptation extends dive time in a semi-aquatic lizard.","authors":"Lindsey Swierk","doi":"10.1098/rsbl.2024.0371","DOIUrl":"https://doi.org/10.1098/rsbl.2024.0371","url":null,"abstract":"Bubble use evolved in many small invertebrates to enable underwater respiration, but, until recently, there has been no evidence that vertebrate animals use bubbles in a similar manner. Only one group of vertebrates, semi-aquatic Anolis lizards, may be an exception: these lizards dive underwater when threatened and, while underwater, rebreathe a bubble of air over their nostrils. Although it seems that rebreathing should be adaptive, possibly functioning to extend the time that lizards remain in underwater refugia, this has not been empirically tested. Here, I demonstrate that rebreathing serves to extend dive time in a semi-aquatic anole, Anolis aquaticus. I prevented the formation of normal rebreathing bubbles by applying a commercial emollient on the skin surface where bubbles form to assess the impact of bubbles on rebreathing cycles, gular pumps, and dive times. Lizards that were allowed to rebreathe normally remained underwater an average of 32% longer than those with impaired rebreathing, suggesting a functional role of rebreathing in underwater respiration. Unlike rebreathing, gular pumping was unaffected by treatment and may warrant further research regarding its role in supplementing underwater respiration. This study provides evidence that vertebrates can use bubbles to respire underwater and raises questions about adaptive mechanisms and potential bio-inspired applications.","PeriodicalId":9005,"journal":{"name":"Biology Letters","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142264627","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

Patterns of sexual dimorphism in the armoured tardigrades. 铠甲蜥的性二态模式。

IF 3.3 2区生物学

Biology Letters Pub Date : 2024-09-11 DOI: 10.1098/rsbl.2024.0301

Matteo Vecchi,Sara Calhim

{"title":"Patterns of sexual dimorphism in the armoured tardigrades.","authors":"Matteo Vecchi,Sara Calhim","doi":"10.1098/rsbl.2024.0301","DOIUrl":"https://doi.org/10.1098/rsbl.2024.0301","url":null,"abstract":"Sexual dimorphism is widespread among animals, with diverse patterns and proposed explanations observed across the Tree of Life. Here we present the first formal analysis of the patterns of sexual dimorphism in body size and cephalic sensory appendages across 40 species (from 10 genera) of armoured tardigrades (Echiniscidae). Phylogenetic signal was found for body size traits and the cephalic papilla relative size, indicating that the association between these traits between the sexes has high evolutionary persistence. The Echiniscidae body size dimorphism is generally female-biased, which would be in accordance with the fecundity hypothesis. No strong evidence of allometric patterns of body size sexual dimorphism was found. In contrast, some of the cephalic appendages show male-biased sexual dimorphism, particularly those that, by being more innervated, are thought to function as chemodetection organs used by males during mate search. The latter is consistent with the sexual selection hypothesis. As the first systematic quantification and analysis of the patterns of sexual dimorphism in the phylum Tardigrada, this study provides important insights into their ecology and evolution, such as corroborating the suggestion that cephalic appendages evolved for mate searching.","PeriodicalId":9005,"journal":{"name":"Biology Letters","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223833","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

No evidence for an up-regulation of female immune function in response to elevated risk of sexual conflict. 没有证据表明女性的免疫功能会随着性冲突风险的升高而上调。

IF 2.8 2区生物学

Biology Letters Pub Date : 2024-09-01 Epub Date: 2024-09-04 DOI: 10.1098/rsbl.2024.0141

Blake W Wyber, Joseph L Tomkins, Leigh W Simmons

引用次数: 0