The role of the "encounter" call in spacing of Pacific tree frogs, Hyla regilla

1980 ◽  
Vol 58 (1) ◽  
pp. 75-78 ◽  
Author(s):  
Carl L. Whitney
Keyword(s):  
Hyla Regilla ◽  
Mating Call ◽  
Mating Calls ◽  
Tree Frogs

When calling male Pacific tree frogs come closer together than about 50 cm, they switch from the mating call to the encounter call. After an exchange of encounter calls, one of the frogs may submit by retreating or ceasing to call, or they may fight, after which the loser submits. To investigate the role of the encounter call in maintaining spacing, I compared the responses of calling males lo playback of encounter calls and mating calls. During 60-s playbacks, most frogs responded initially to both vocalizations by uttering encounter calls, but they were more likely to respond further to encounter calls by either attacking or submitting. I suggest that the encounter call serves to reduce the amount of time that calling frogs remain close together and, as a consequence, to enhance their chances of attracting females.

Spacing and calling in Pacific tree frogs, Hyla regilla

1975 ◽  
Vol 53 (11) ◽  
pp. 1519-1527 ◽  
Author(s):  
Carl L. Whitney ◽  
John R. Krebs
Keyword(s):  
Local Area ◽  
Hyla Regilla ◽  
Behavioral Interactions ◽  
Mating Call ◽  
Control Situation ◽  
Tree Frogs ◽  
Empty Area

Calling male Pacific tree frogs space out more than if they were distributed at random on the available calling sites. When new frogs are added to an area that is already occupied by some calling males, fewer additional frogs call than in a control situation where frogs are added to an empty area. This shows that behavioral interactions between frogs limit the number that call in a local area. A further experiment showed that the mating call played through loudspeakers is sufficient to inhibit additional frogs from calling. We conclude that calling leads to spacing out, which in turn limits the density of calling frogs in a local area.

Not only a listener: female frog-biting midges (Corethrellidae) also distinguish the shape of frogs

2021 ◽  
pp. 1-4
Author(s):  
Fernando Rodrigues da Silva ◽  
Crasso Paulo Bosco Breviglieri
Keyword(s):  
Visual Cues ◽  
Tree Frog ◽  
Long Distance ◽  
Biting Midges ◽  
Host Seeking ◽  
Mating Call ◽  
Mating Calls ◽  
Host Detection ◽  
Light Green

Abstract It is well known that female adults of frog-biting midges (Corethrellidae) are attracted by anuran mating calls. However, the role of host-emitted cues other than mating calls in determining the level of attraction remains poorly understood. Here, we performed field playback experiments to test how the host-seeking behaviour of Corethrella Coquillett is influenced by different sound stimuli: mating call of a tree frog, cricket call, and no sound. Then, after long-distance host detection, we evaluated if Corethrella can distinguish landing sites by using at short distance the colour and/or shape of anurans. For that, we placed artificial models of frogs with different colours (light green and dark brown) and an artificial caterpillar model (light green colour) on the top of speakers. We found that only frog mating calls presented with the visual cue of an artificial frog were attacked by Corethrella, suggesting that frog shape, regardless of colour, is an important cue for the identification of its hosts. This is the first study providing evidence that after flying long distances guided by frog calls, Corethrella can identify their hosts using visual cues at short distances.

scholarly journals A new species of Tomopterna (Anura: Ranidae) from the Kruger National Park, with notes on related species

Koedoe ◽  
1975 ◽  
Vol 18 (1) ◽  
Author(s):  
N. I. Passmore ◽  
V. C. Carruthers
Keyword(s):  
New Species ◽  
National Park ◽  
Kruger National Park ◽  
The Other ◽  
Defence Mechanisms ◽  
Calling Behaviour ◽  
Mating Call ◽  
Mating Calls ◽  
New Form ◽  
A New Species

A new species of Tomoptema, T. krugerensis, sp. n., has been recorded from the Kruger National Park, Republic of South Africa.Morphologically it is very similar to T. delalandei cryptotis (Boulenger) but the mating call is markedly different from that of the other members of the genus and this is coupled with small but consistent morphological differences.T. krugerensis sp. n. is known to occur only on a portion of the western fringe of the vast sandveld areas of Mozambique, but possibly has a much wider distribution. Mating call, calling behaviour, eggs, early development and defence mechanisms are described. The affinities of the new form are discussed and the mating calls of other members of the genus are reviewed. Mating call is again shown to be a sensitive non-morphological taxonomic tool.

The role of the environment on the acoustic radiation patterns of mating calls of the túngara frog.

2010 ◽  
Vol 128 (4) ◽  
pp. 2412-2412
Author(s):  
Ximena E. Bernal ◽  
Rachel A. Page ◽  
Michael J. Ryan ◽  
Theodore F. Argo ◽  
Preston S. Wilson
Keyword(s):  
Acoustic Radiation ◽  
Radiation Patterns ◽  
Mating Calls

Mating call differences between diploid and tetraploid green toads (Bufo viridis complex) in Middle Asia

1998 ◽  
Vol 19 (1) ◽  
pp. 29-42 ◽  
Author(s):  
Matthias Stöck
Keyword(s):  
Water Temperature ◽  
Pulse Duration ◽  
Interval Duration ◽  
Premating Isolation ◽  
Separate Species ◽  
Call Duration ◽  
Bufo Viridis ◽  
Fundamental Frequencies ◽  
Mating Call ◽  
Mating Calls

AbstractMating calls of diploid and tetraploid green toads (Bufo viridis complex) from Iran, Turkmenistan, Uzbekistan and Kyrgyzstan were investigated during the breeding periods in 1994 and 1995 across a range of temperatures from 9°C to 22°C. Interpulse interval duration, pulse duration and call duration were negatively correlated with water temperature. At any given temperature tetraploid toads exhibited longer pulses and interpulse intervals resulting in lower pulse rates than diploid toads. These differences reveal a potential premating isolation barrier and provide an additional argument to consider diploid and tetraploid green toads as separate species. Call duration did not differ significantly between diploid and tetraploid green toads. Fundamental frequencies lay in the same range in both diploid and tetraploid toads.

Is there a dialect in Pelodytes punctatus from southern Portugal?

1992 ◽  
Vol 13 (2) ◽  
pp. 97-108 ◽  
Author(s):  
M. Paillette ◽  
M.E. Oliveira ◽  
E.G. Crespo ◽  
H.D. Rosa
Keyword(s):  
Pulse Rate ◽  
Mating Call ◽  
Rate Acceleration ◽  
Mating Calls ◽  
Southern Portugal

AbstractThe mating call of Pelodytes punctatus from Algarve (Southern Portugal) is composed of two multipulsed motives, "a" and "b", lasting about 200 ms. One "a" is followed by two, three or more "b"s giving a sucession of "a-b-b-...". The inner timing in pulse rate acceleration distinguishes each motive. We suggest that the Algarve population has its own dialect, which is different from those of Camargue and Liguria, whose mating calls are longer (about 300 and 400 ms) with a syntax of "a-b" pairs. Pulse rates and durations change with temperature.

scholarly journals Effect of temperature on life-history traits and mating calls of a field cricket, Acanthogryllus asiaticus

2020 ◽  
Author(s):  
Richa Singh ◽  
P Prathibha ◽  
Manjari Jain
Keyword(s):  
Life History ◽  
Ambient Temperature ◽  
Life History Traits ◽  
Sexual Communication ◽  
Peak Frequency ◽  
Field Cricket ◽  
Effect Of Temperature ◽  
Developmental Temperature ◽  
Mating Call ◽  
Mating Calls

AbstractEctotherms are sensitive to the changes in ambient temperature with respect to their physiology and development. To compensate for the effects of variation in temperature, ectotherms exhibit physiological plasticity which can be for short or long term. An extensive body of literature exists towards understanding these effects and the solutions ectotherms have evolved. However, to what extent rearing temperature during early life stages impacts the behaviour expressed in adulthood is less clearly understood. In the present study, we aimed to examine the effect of developmental temperature on life-history traits and mating call features in a tropical field cricket, Acanthogryllus asiaticus. We raised A. asiaticus at two different developmental conditions: 25°C and 30°C. We found developmental time and adult lifespan of individuals reared at 30°C to be shorter than those at 25°C. Increased developmental temperature influenced various body size parameters differentially. Males raised at 30°C were found to be larger and heavier than those raised at 25°C, making A. asiaticus an exception to the temperature-size rule. We found a significant effect of the change in immediate ambient temperature on different call features of both field-caught and lab-bred individuals. In addition, developmental temperature also affected mating call features as individuals raised at higher temperature produced faster calls with a higher peak frequency compared to those raised at lower temperature. However, the interaction of both developmental and immediate temperature on mating calls showed differential effects. Our study highlights the importance of understanding how environmental temperature shapes life-history and sexual communication in crickets.

Social Interaction among Chorusing Pacific Tree Frogs, Hyla regilla

Copeia ◽  
1978 ◽  
Vol 1978 (2) ◽  
pp. 208 ◽  
Author(s):  
Frank T. Awbrey
Keyword(s):  
Social Interaction ◽  
Hyla Regilla ◽  
Tree Frogs
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