Relevant bibliographies by topics / Dendrobates pumilio

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Academic literature on the topic 'Dendrobates pumilio'

Author: Grafiati
Published: 4 June 2021
Last updated: 19 February 2022

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Journal articles on the topic "Dendrobates pumilio"

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Caldwell, Janalee, Laurie Vitt, and William Cooper. "Conspicuousness and vestigial escape behaviour by two dendrobatid frogs, Dendrobates auratus and Oophaga pumilio." Behaviour 146, no. 3 (2009): 325–49. http://dx.doi.org/10.1163/156853909x410946.

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AbstractAposematic prey are thought to move slowly and openly near predators, but exhibit reduced escape behaviour. We studied conspicuousness and escape by aposematic poison frogs (Dendrobates auratus and Oophaga pumilio). In circles of leaf litter, observers detected poison frogs quickly. Flight initiation distance (FID, predator-prey distance when escape begins) increases with approach speed in non-cryptic palatable prey, but not for frogs in clearings, which permitted close approach. On trails frogs moved slowly into forest and FID in D. auratus increased with approach speed. Distance from cover and handling exposing predators to distastefulness may account for greater reliance on aposematism in clearings. We observed responses to a simulated predator (stick with painted face) in three conditions: not approached, approached, and touched. Latency to hop and time to exit circles decreased and exit from circles was directed further away from the approach path in the order not approached, approached, touched. Oophaga pumilio changed directions less when approached than not; many exhibited no escape behaviour. Aposematic dendrobatids move slowly near predators, but retain risk-assessment mechanisms due to occasional predation. Differences in escape between dendrobatids and palatable Craugastor frogs suggest that dendrobatid defensive behavior may have been molded to maximize the effectiveness of aposematism.
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Gardner, Emily A., and Brent M. Graves. "Responses of Resident Male Dendrobates pumilio to Territory Intruders." Journal of Herpetology 39, no. 2 (June 2005): 248–53. http://dx.doi.org/10.1670/95-04a.

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Baugh, Julia R., and Don C. Forester. "Prior Residence Effect in the Dart-Poison Frog, Dendrobates Pumilio." Behaviour 131, no. 3-4 (1994): 207–24. http://dx.doi.org/10.1163/156853994x00442.

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AbstractEach of 32 male, Dendrobates pumilio (red phase) were allowed to establish a territory in one half of a 40 liter aquarium. Each enclosure contained a substrate of Sphagnum, a potted plant, and a water dish. Males occupying the same aquarium were prevented from seeing one another by an opaque barrier. In the first experiment, residents were presented with a conspecific intruder matched for size and color. Based on a numerical index of aggression, residents were consistently dominant over intruders. When reciprocal trials were conducted, the results were reversed (i.e. residents were dominant over males to which they previously had been subordinate). The success of resident males was not influenced by the size of conspecific intruders. In addition, residents consistently dominated a sympatric confamilial intruder (Phyllobates lugubris). Removal experiments revealed that resident males recognize and defend their enclosures after 3, and to a lesser degree, 6 days of isolation. We also examined the effect of territorial markers on the prior residence effect by stepwise removal of the plant and Sphagnum. Residents aggressively defended enclosures in both experiments. When Sphagnum was removed from the resident's enclosures and placed in a previously unused aquaria, 7 of 10 males exhibited dominance over conspecific intruders.
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Pröhl, Heike. "Territorial behaviour of the strawberry poison-dart frog, Dendrobates pumilio." Amphibia-Reptilia 18, no. 4 (1997): 437–42. http://dx.doi.org/10.1163/156853897x00495.

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5

Donnelly, Maureen A. "Feeding Patterns of the Strawberry Poison Frog, Dendrobates pumilio (Anura: Dendrobatidae)." Copeia 1991, no. 3 (August 1, 1991): 723. http://dx.doi.org/10.2307/1446399.

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6

Haase, Annely, and Heike Pröhl. "Female activity patterns and aggressiveness in the strawberry poison frog Dendrobates pumilio (Anura: Dendrobatidae)." Amphibia-Reptilia 23, no. 2 (2002): 129–40. http://dx.doi.org/10.1163/156853802760061778.

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AbstractFemale strawberry poison frogs (Dendrobates pumilio) exhibit highly evolved maternal care, including tadpole transport and tadpole provisioning with unfertilized eggs. We observed that tadpole-rearing and mating activity are mutually exclusive behavioural states in a Costa Rican population. Tadpole-rearing females did not engage in courtship activity. Only non-rearing females courted. Non-rearing females occupied larger home ranges than tadpole-rearing females, which may be related to female selection of mates. For the first time aggressive female-female interactions were observed in the field. Tadpole-rearing females were significantly more aggressive than non-rearing females, especially in the vicinity of their offspring-rearing sites. Las hembras de la ranita roja Dendrobates pumilio ejecutan cuidado parental altamente desarrollado que incluye el transporte y la alimentación de los renacuajos. En una población costaricense encontramos que el cuido materno y la actvidad sexual son comportamientos mutualmente exclusivos: Las hembras que estan cuidando a su cría son sexualmente inactivas, solamente las hembras sin renacuajos se aparean. Las hembras sexualmente activas poseian un rango de actividad más grande que las hembras cuidando a renacuajos. Los rangos de actividad en el primer grupo de hembras eran más grandes probablemente porque ellas visitan los territorios de varios machos con el fin de seleccionar una pareja. Además, por la primera vez interacciones aggressivas entre las hembras de la ranita roja fueron observados en el campo, siendo más aggressivas las hembras con rencuajos, particularmente en la vencidad de los hábitats de su cría.
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7

Donnelly, Maureen A. "Demographic Effects of Reproductive Resource Supplementation in a Territorial Frog, Dendrobates Pumilio." Ecological Monographs 59, no. 3 (September 1989): 207–21. http://dx.doi.org/10.2307/1942599.

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8

Donnelly, Maureen A. "Reproductive Phenology and Age Structure of Dendrobates pumilio in Northeastern Costa Rica." Journal of Herpetology 23, no. 4 (December 1989): 362. http://dx.doi.org/10.2307/1564047.

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Brust, Douglas G. "Maternal Brood Care by Dendrobates pumilio: A Frog That Feeds Its Young." Journal of Herpetology 27, no. 1 (March 1993): 96. http://dx.doi.org/10.2307/1564914.

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10

Pröhl, Heike, Sabine Hagemann, Jan Karsch, and Gerlinde Höbel. "Geographic Variation in Male Sexual Signals in Strawberry Poison Frogs (Dendrobates pumilio)." Ethology 113, no. 9 (September 2007): 825–37. http://dx.doi.org/10.1111/j.1439-0310.2007.01396.x.

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Dissertations / Theses on the topic "Dendrobates pumilio"

1

Murasaki, Seiichi. "Sex-Specific Patterns of Movement and Space Use in the Strawberry Poison Frog, Oophaga pumilio." FIU Digital Commons, 2010. http://digitalcommons.fiu.edu/etd/226.

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The home range encompasses an animal’s movements as it goes about its normal activity, and several home range estimators have been developed. I evaluated the performance of the Minimum Convex Polygon, Bivariate Normal, and several kernel home range estimators in a geographical information system environment using simulations and a large database of O. pumilio mark-recapture locations. A fixed 90% kernel estimator using Least-Square Cross-Validation (to select the bandwidth) outperformed other methods of estimating home range size and was effective with relatively few capture points. Home range size, core area size, intrasexual overlap, and movement rates among coordinates were higher in female frogs than in male frogs. These measures likely reflect behavioral differences related to territoriality (males only) and parental care (both sexes). The simple Biological Index of Vagility (BIV) generated movement values that scaled well with home range size while revealing more information than home range estimates alone.
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Rudh, Andreas. "Aposematism, Crypsis and Population Differentiation in the Strawberry Poison Frog." Doctoral thesis, Uppsala universitet, Zooekologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-175240.

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Evolutionary transitions between the two major predator avoidance strategies aposematism and crypsis are expected to be associated with changes in many important traits of animals. However, empirical studies on populations experiencing ongoing or recent transitions between these strategies are rare. This thesis investigates the co-evolution of traits among populations of the Strawberry poison frog D.pumilio in Bocas del Toro, Panama. I found that all investigated populations were genetically distinct but that colour and pattern did not correlate with genetic or geographic distance, which suggests that selection needs to be invoked to explain the observed variation. Based on the chromatic contrast between frog dorsal colour and the natural habitat substrates used by the frogs, the populations were defined as bright or dull coloured. I found that frogs from bright coloured populations were larger. This is expected if aposematism is enhanced by large signals while crypsis is enhanced by small size. Further, individuals from bright coloured populations had a coarser black dorsal pattern, which is expected if crypsis is impaired by a bold pattern. The importance of pattern coarseness was confirmed by an avian detection experiment showing that coarse patterned dark green prey were more easily detected than dark green prey without pattern or with fine pattern. I put forward the hypothesis that enhanced protection, gained by aposematism, may affect behaviours that influence dispersal and pairing patterns. Indeed, males from bright coloured populations displayed at more exposed sites and showed a tendency to be more explorative and aggressive. In summary, my results show that the bright and dull coloured populations most likely represent an aposematic and a cryptic strategy, respectively. Furthermore, I show that evolutionary changes between aposematism and crypsis can be associated with coevolution of both morphology and behaviour. I argue that this coevolution may increase the likelihood of both pre- and post-zygotic reproductive isolation. This is because greater phenotypic differences between populations increase the likelihood of selection against badly adapted migrants and hybrids with intermediate traits.
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Crothers, Laura Rose. "Intrasexual selection and warning color evolution in an aposematic poison dart frog." Thesis, 2014. http://hdl.handle.net/2152/30933.

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Flamboyant colors are widespread throughout the animal kingdom. While many of these traits arise through sexual selection, bright coloration can also evolve through natural selection. Many aposematic species, for example, use conspicuous warning coloration to communicate their noxiousness to predators. Recent research suggests these signals can also function in the context of mate choice. Studies of warning color evolution can therefore provide new insights into how the interplay of natural and sexual selection impact the trajectory of conspicuous signal evolution. For my dissertation, I investigated the potential for male-male competition to impact the warning color evolution of a species of poison frog. I focused my work on an exceptionally bright and toxic population of the strawberry poison frog (Oophaga pumilio) where males are brighter than females, a classic signature of sexual selection. In Chapter 1, I used theoretical models of predator and frog visual systems to determine which can see the variation in bright warning coloration within this population. I found that birds, the presumed major predator, likely cannot see this variation, indicating that sexual selection can work under the radar of predators in this species. In Chapter 2, I tested the aggressive responses of males using a two-way choice paradigm that manipulated the perceived brightness of stimulus males. I found that males directed more of their behaviors to bright stimulus frogs, and brighter focal frogs more readily approached stimuli and directed more of their attention to the brighter rival. In Chapter 3, I tested the outcomes of dyadic interactions between males of varying brightness and observed male reactions to simulated intruders in their territories. I found that brighter males initiated aggressive interactions with rivals more readily, and brightness asymmetries between males settled interactions in a way that is consistent with classic hypotheses about male sexual signals. In Chapter 4 I sought to describe physiological correlates of male warning color brightness. While male brightness did not co-vary with classic measures of body condition (circulating testosterone and skin carotenoids), it did correlate with toxins sequestered from the diet and thus appears to be a reliable signal of toxicity in this population.
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