Contrasting parental roles shape sex differences in poison frog space use but not navigational performance

eLife, Journal Year: 2022, Volume and Issue: 11

Published: Nov. 15, 2022

Sex differences in vertebrate spatial abilities are typically interpreted under the adaptive specialization hypothesis, which posits that male reproductive success is linked to larger home ranges and better navigational skills. The androgen spillover hypothesis counters enhanced performance may be a byproduct of higher levels. Animal groups include species where females expected outperform males based on life-history traits key for disentangling these hypotheses. We investigated association between sex strategies, behavior, levels three poison frogs. tracked individuals natural environments show contrasting parental roles shape space use, performing duties shows wider-ranging movements. then translocated frogs from their areas test found caring outperformed non-caring only one out species. In addition, across displayed more explorative behavior than correlated with homing accuracy. Overall, we reveal frog strategies movement patterns but not necessarily performance. Together this work suggests prevailing hypotheses provide an incomplete explanation abilities.

Language: Английский

---

How Signaling Geometry Shapes the Efficacy and Evolution of Animal Communication Systems

Integrative and Comparative Biology, Journal Year: 2021, Volume and Issue: 61(3), P. 787 - 813

Published: May 20, 2021

Synopsis Animal communication is inherently spatial. Both signal transmission and reception have spatial biases—involving direction, distance, position—that interact to determine signaling efficacy. Signals, be they visual, acoustic, or chemical, are often highly directional. Likewise, receivers may only able detect signals if arrive from certain directions. Alignment between these directional biases therefore critical for effective communication, with even slight misalignments disrupting perception of signaled information. In addition, degrade as travel signaler receiver, environmental conditions that impact can vary over small spatiotemporal scales. Thus, how animals position themselves during likely under strong selection. Despite this, our knowledge regarding the arrangements signalers remains surprisingly coarse most systems. We know less about receiver behaviors contribute alignment time, evolved influence and/or respond aspects animal communication. Here, we first describe why researchers should adopt a more explicitly geometric view signaling, including issues location, distance. then social influences introduce further complexities geometry signaling. discuss multimodality offers new challenges opportunities receivers. conclude recommendations future directions made visible by attention

Language: Английский

---

Novel and classical methods similarly describe variation in territory size among males in Neotropical poison frogs with contrasting reproductive and behavioral strategies

Evolutionary Ecology, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 2, 2024

Abstract Territoriality is a form of social dominance concerning the use space that ensures territory owner primary access to critical resources. The defended with visual displays, advertisement calls, physical attacks, or chemical signals. frequently estimated by mapping locations where an animal observed engaging in territorial behavior tracking. However, these approaches may over- underestimate areas defended. Thus, explicitly determining properly characterize territory. Intrusion experiments can elicit response holders, allowing one their aggressive responses; however, depends on species. We describe approach experimentally estimate size using playback species exhibits stereotypical phonotactic response: nurse frog, Allobates aff. trilineatus and develop new behavioral index allows assessing playbacks for non-stereotyped endangered Lehmann’s poison Oophaga lehmanni . conducted 772 18 males A. , 222 nine O. analyzed results three different area estimators regularly used evaluated whether estimates are correlated. shape territories varied among individuals both Although we found absolute method used, were strongly correlated, meaning similarly variation males. Choosing analysis not be particularly important studying characteristics territoriality over time but systematic standardized experimental also incorporates particularities each essential understand evolution frogs other

Language: Английский

---

Frog call transmission in forestry monocultures: Are there drawbacks?

Biotropica, Journal Year: 2023, Volume and Issue: 55(5), P. 1006 - 1018

Published: Aug. 1, 2023

Abstract Anuran males emit advertisement calls for the purpose of attracting females and repelling conspecific males. Call transmission is influenced by acoustics propagation environment, including vegetation. Thus, forestry monocultures non‐native trees represent artificial environments that could modify call transmission. These have substituted large areas Atlantic Forest in southern Brazil, representing a conservation challenge. Considering this context, we hypothesized anurans are less attenuated their native environment than forest plantations. To test it, performed sound experiments using three anuran species to Brazil: Boana bischoffi , B. leptolineata Hylodes meridionalis . We compared attenuation between ( Eucalyptus sp. Pinus forests), included distance from source, air temperature, humidity, vegetation density as cofactors linear mixed models. Our results show two tree frogs ) attenuate plantations forests, while third shows either no differences or forests. can be understood according natural history microhabitat use among studied species. The frog vocalize perched so become better transmitted monocultures, which fewer forest. On other hand, H. rocks on streams finely tuned peculiar microhabitat. discuss implications our findings Forest. Portuguese Spanish available with online material.

Language: Английский

---

Does anthropogenic noise promotes advertisement call adjustments in the rubí poison frog Andinobates bombetes?

Behaviour, Journal Year: 2021, Volume and Issue: 158(7), P. 565 - 583

Published: March 15, 2021

Abstract Anthropogenic noise, characterized by higher intensities at low frequencies, can restrict acoustic communication between conspecifics and eventually reduce the fitness of populations. We analysed changes in call features 52 males poison frog A. bombetes subjected to anthropogenic noise through playback experiments. Thirty-one did not during playbacks, but remaining 21 did. Fourteen those increased their dominant frequency on average 130.76 Hz when exposed noise. Males increase or diminish emission rate, number pulses, duration calls. It is possible that increasing calls are showing a behavioural strategy maintain signal-to-noise ratio, which allows them communicate acoustically noisy habitats. Further studies necessary corroborate this hypothesis given magnitude was small (<100 Hz) for most males.

Language: Английский

---

Reproductive behaviors promote ecological and phenotypic sexual differentiation in the critically endangered Lehmann’s poison frog

Evolutionary Ecology, Journal Year: 2022, Volume and Issue: 36(6), P. 1077 - 1093

Published: Sept. 1, 2022

Abstract Territoriality and parental care are complex reproductive behaviors found in many taxa from insects to mammals. Parental can be carried out by the female, male, or both, depending on species. Territoriality, contrast, is predominantly displayed males. Different selective pressures imposed individuals sex performing territorial may also lead sexual differentiation other life-history traits. Due their behavior diversity of behaviors, Neotropical poison frogs an excellent study system investigate whether behavioral traits influence intrinsic extrinsic individuals. Here, we evaluate mediate ecological (habitat use) phenotypic (coloration, morphology) critically endangered Lehmann’s frog ( Oophaga lehmanni ), a species which males defend territories while females provide care. We differences habitat use morphological traits, but not coloration. Males trunks green leaves as perches more frequently higher substrates, than females. no body size, have longer arms males, probably associated with duties (climbing trees feed tadpoles). Altogether, our results evidence that selection act differently male female territoriality promote evolution dendrobatids. Long-term wildlife observations essential identify important hypotheses about ecology conservation this vertebrate

Language: Английский

---

Aggressive responses to rivals depend on the interaction between the vocal traits of territory-holder and mimicked intruders in a miniature tropical frog

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: April 19, 2024

Territory defence is an important aspect of animal behaviour, and tightly linked to rival assessment species recognition processes. An component these two processes signalling, animals must decide how respond a challenge based on the signals they perceive from their rivals. Here we manipulated note repetition rate rocket frog calls simulate rivals with high low vocal performances, tested aggressive responses males in field. We found that probability aggression depended interaction between stimulus treatment peak frequency territorial males. Low-frequency calling were more likely aggressively fast call, while high-frequency showed higher towards slow call. Frogs responded approached call 2.4-times faster than also increased frequencies response playbacks, did not modify vocalizations. Body weight was correlated or inter-note interval Peak amplitude (loudness) are positively interrelated frogs, potential indicators motivational state signaller. argue low-frequency singing at maximum capacity, output when challenged by rival, especially high-performance individual. show depends temporal parameters but territory-holders compare own those challengers terms frequency, therefore demonstrate frogs pay attention different aspects during decision-making.

Language: Английский

---

Developments in the study of poison frog evolutionary ecology II: decoding hidden messages in their coloration and unique behaviours

Evolutionary Ecology, Journal Year: 2024, Volume and Issue: 38(5), P. 551 - 570

Published: Oct. 1, 2024

Language: Английский

---

Tissue-specific in vivo transformation of plasmid DNA in Neotropical tadpoles using electroporation

PLoS ONE, Journal Year: 2023, Volume and Issue: 18(8), P. e0289361 - e0289361

Published: Aug. 17, 2023

Electroporation is an increasingly common technique used for exogenous gene expression in live animals, but protocols are largely limited to traditional laboratory organisms. The goal of this protocol test vivo electroporation techniques a diverse array tadpole species. We explore efficiency tissue-specific cells five species from across three families tropical frogs: poison frogs (Dendrobatidae), cryptic forest/poison (Aromobatidae), and glassfrogs (Centrolenidae). These well known their social behaviors intriguing physiologies that coordinate chemical defenses, aposematism, and/or tissue transparency. Specifically, we examine the effects electrical pulse injection parameters on species- transfection plasmid DNA tadpoles. After encoding green fluorescent protein (GFP), found strong GFP fluorescence within brain muscle increased with amount injected number. discuss species-related challenges, troubleshooting, outline ideas improvement. Extending non-model amphibian could provide new opportunities exploring topics genetics, behavior, organismal biology.

Language: Английский

---

Androgen responsiveness to simulated territorial intrusions in Allobates femoralis males: evidence supporting the challenge hypothesis in a territorial frog

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2020, Volume and Issue: unknown

Published: Nov. 17, 2020

Abstract Territorial behaviour has been widely described across many animal taxa, where the acquisition and defence of a territory are critical for fitness an individual. Extensive evidence suggests that androgens (e.g. testosterone) involved in modulation territorial male vertebrates. Short-term increase androgen following encounter appears to favour outcome challenge. The “Challenge Hypothesis” proposed by Wingfield colleagues outlines existence positive feedback relationship between social challenges intrusions) Here we tested challenge hypothesis highly poison frog, Allobates femoralis , its natural habitat exposing males simulated intrusions form acoustic playbacks. We quantified repeatedly concentrations individual via non-invasive water-borne sampling approach. Our results show A. exhibited behavioural androgenic response after being confronted intrusions, providing support Challenge Hypothesis frog.

Language: Английский

---