Geographic variation in advertisement calls of Crinia signifera (Anura:Myobatrachidae) in the Bass Strait area of south-eastern Australia

2005 ◽  
Vol 53 (4) ◽  
pp. 221 ◽  
Author(s):  
M. J. Littlejohn
Keyword(s):  
Geographic Variation ◽  
Dominant Frequency ◽  
Demographic Structure ◽  
Advertisement Calls ◽  
Call Duration ◽  
Sea Levels ◽  
South Eastern ◽  
South Central ◽  
Eastern Australia ◽  
Pattern Of Variation

The structure of recorded advertisement calls of a total of 176 males of Crinia signifera from eight localities on the south-eastern Australian mainland and Tasmania was investigated. On the basis of number of pulses per call (samples from all localities) and call duration adjusted to 13.0°C (samples from six localities), two geographic groups are recognised: (1) south-central Victoria, and (2) the extreme south-eastern mainland and Tasmania. This pattern of variation is postulated to reflect expansion of a differentiated Tasmanian stock on to the extreme south-eastern Australian mainland along the eastern sill of the Bassian Isthmus during the lower sea levels of the Late Pleistocene. Geographic variation in pulse rate (derived from number of pulses and call duration) was also considered because of its use in previous studies. The variation in dominant frequency in samples from five localities, adjusted for snout–vent length, does not conform to that for number of pulses and call duration, and is attributed to differences in demographic structure and recruitment.

Geographic variation in the advertisement call of Crinia signifera (Anura:Myobatrachidae) on Kangaroo Island and across southern south-eastern Australia

2008 ◽  
Vol 56 (4) ◽  
pp. 223 ◽  
Author(s):  
Murray J. Littlejohn
Keyword(s):  
Geographic Variation ◽  
Pulse Number ◽  
Advertisement Call ◽  
Regional Study ◽  
South Eastern ◽  
Island Sample ◽  
Eastern Australia ◽  
Continental Islands ◽  
Two Populations ◽  
South Eastern Australia

The male advertisement call of anuran amphibians has a major role in mate choice, and regional variation in this attribute can act as an indicator of speciation and a marker for genetic differentiation. As part of a regional study of geographic variation in the male advertisement call of Crinia signifera across south-eastern Australia and adjacent larger continental islands, samples of advertisement calls from two populations on Kangaroo Island and two populations on the adjacent Fleurieu Peninsula were compared. Four call attributes were considered: pulse number, call duration, pulse rate and dominant frequency. Pulse number is considered the most reliable for comparative purposes because it is not influenced by effective temperature or audio recording and analysis. The two island populations (central and eastern, ~24 km apart) differ significantly in pulse number, with contact but no overlap of interquartile ranges. The eastern sample differs markedly from those on the nearby Fleurieu Peninsula – which are both similar to the more distant central island sample. Geographic variation in pulse number in these four samples and 11 others from two recent publications is then interpreted in the light of land bridges and lower temperatures of the late Pleistocene and early Holocene.

scholarly journals Advertisement calls of Fejervarya multistriata (Anura: Dicroglossidae), with a review of anurans in China

2020 ◽  
Vol 70 (4) ◽  
pp. 459-481
Author(s):  
You-Fu Lin ◽  
Zhi-Qiang Chen ◽  
Yun Tang ◽  
Jing-Yi Chen ◽  
Guo-Hua Ding ◽  
...  
Keyword(s):  
Individual Recognition ◽  
Generalized Least Squares ◽  
Dominant Frequency ◽  
Water Type ◽  
Stagnant Water ◽  
Advertisement Calls ◽  
Call Duration ◽  
Breeding Habitats ◽  
Coefficients Of Variation ◽  
Combined Impact

Abstract Vocalization plays an important role in the communication of anurans. In this study, the advertisement calls of male Fejervarya multistriata obtained in Lishui, Zhejiang, China during the breeding season were recorded. Their note number (NN), note duration (ND), note interval (NI), call duration (CD), pitch (PIT), call intensity (CIT) and dominant frequency (DF) were analyzed. The calls of F. multistriata are composed of one to 38 notes, and calls composed of fewer than ten notes have the highest frequency. Male frogs produced calls ranging from 1201 Hz to 3357 Hz with two DFs (1412.49 Hz and 2953.89 Hz). By comparing the differences among individual calls, it was found that the within-individual coefficients of variation (CVW) and among-individual coefficients of variation (CVA) for NN, NI, CD, PIT and DF were more than 10%, whereas that of CIT was less than 5%. The CVA/CVW ratios indicate that ND is important for sexual selection, whereas NN, NI CD, PIT, CIT, and DF are important for individual recognition. Phylogenetic generalized least squares analysis showed that phylogenetic signals affect DF vs. snout-vent length (SVL) and CD of anurans in China, and accounting for phylogenetic signals, DF was negatively correlated with SVL. DF was found to be higher in anurans that breed in flowing water than in those that breed in stagnant water, after eliminating the effects of phylogeny and SVL. Therefore, we conclude that phylogenetic effects, SVL, and the water type of breeding habitats have a combined impact on the advertisement calls in anurans.

scholarly journals Interspecific and Geographic Variation in the Diets of Sympatric Carnivores: Dingoes/Wild Dogs and Red Foxes in South-Eastern Australia

PLoS ONE ◽  
2015 ◽  
Vol 10 (3) ◽  
pp. e0120975 ◽  
Author(s):  
Naomi E. Davis ◽  
David M. Forsyth ◽  
Barbara Triggs ◽  
Charlie Pascoe ◽  
Joe Benshemesh ◽  
...  
Keyword(s):  
Geographic Variation ◽  
Red Foxes ◽  
South Eastern ◽  
Eastern Australia ◽  
Sympatric Carnivores ◽  
Wild Dogs ◽  
South Eastern Australia

Colour Pattern Polymorphism in the Grasshopper Phaulacridium Vittatum. I. Geographic Variation in Victoria and Evidence of Habitat Association.

1984 ◽  
Vol 32 (2) ◽  
pp. 239 ◽  
Author(s):  
JM Dearn
Keyword(s):  
Geographic Variation ◽  
Habitat Associations ◽  
Colour Pattern ◽  
Habitat Association ◽  
Latitudinal Cline ◽  
Selective Constraints ◽  
South Eastern ◽  
Eastern Australia ◽  
Pattern Polymorphism ◽  
Forest Habitats

The frequencies of the 3 colour pattern morphs (plain, striped and incomplete-striped) in samples of Phaulacridium vittatum (Sjost). from pasture sites in Victoria, Australia, did not conform to the pattern predicted by the latitudinal cline in morph frequencies previously described in south-eastern Australia. Data from 2 transects across pasture-forest boundaries revealed the existence of habitat associations, with forest habitats having a higher frequency of the plain morph. The proximity of some pasture populations to forests may explain some of the variation in morph frequencies observed among pasture sites. However, the frequency of the striped morph was relatively low in all the populations examined; this suggests that there are strong selective constraints on the frequency of striped individuals.

Geographic variation in the laryngeal morphology of a widely distributed South-American anuran: behavioural and evolutionary implications

2020 ◽  
Vol 190 (1) ◽  
pp. 140-148 ◽  
Author(s):  
Carlos López ◽  
Maricel Quispe ◽  
Aldo Villalón ◽  
Miguel L Concha ◽  
Mario Penna ◽  
...  
Keyword(s):  
Geographic Variation ◽  
Communication Systems ◽  
Acoustic Signals ◽  
Dominant Frequency ◽  
South American ◽  
Arytenoid Cartilage ◽  
Acoustic Characteristics ◽  
Advertisement Calls ◽  
Biogeographic Patterns ◽  
Dilator Muscle

Abstract Sound-producing organs generate acoustic signals that have a fundamental role in communication systems. In species exhibiting different biogeographic patterns, variations of these structures can explain a large part of interpopulation differences of their signals. Pleurodema thaul is an anuran with an extensive geographic distribution in Chile and presents an evident divergence in its acoustic signals among three genetic/bioacoustic groups (i.e. northern, central and southern). By means of classic histology and 3D-reconstructions, we study the geographic variation in the larynx of P. thaul males from these three groups. In addition, volumes of six laryngeal structures are used as predictors of acoustic characteristics of advertisement calls recorded in previous studies for the same subjects used in the current study. After removing the effect of body size, the arytenoid cartilage, dilator muscle and vocal cords show significant differences between the three bioacoustic groups. Furthermore, arytenoid cartilage and dilator muscle volumes predict some temporal parameters and also the dominant frequency of advertisement calls. Our results show important geographic variation in laryngeal morphology, which is in correspondence with acoustic, behavioural and genetic variation in this species.

scholarly journals The advertisement call of two species of the Rhinella granulosa group (Anura: Bufonidae)

2018 ◽  
Vol 17 (2) ◽  
pp. 255-265
Author(s):  
Ariovaldo Antonio Giaretta ◽  
Isabelle Aquemi Haga ◽  
Felipe Silva de Andrade
Keyword(s):  
South America ◽  
Rio Grande ◽  
Dominant Frequency ◽  
Species Group ◽  
Pulse Number ◽  
Advertisement Call ◽  
Single Male ◽  
Advertisement Calls ◽  
River Bank ◽  
Call Duration

The advertisement call of two species of the Rhinella granulosa group (Anura: Bufonidae). The group of Rhinella granulosa presently harbors 14 species distributed in Central and South America. The advertisement calls of 12 species have been described. Herein, we provide data on the calls of R. granulosa and R. merianae recorded in populations far from locations of previous call descriptions, and we discuss possible causes of differences found. We used recordings of R. granulosa from the interior of Bahia State and recordings of R. merianae from Roraima. For both, calls consist of a long-lasting trill of four-pulsed notes. Rhinella granulosa calls last 3.7–9.6 s, have 121–283 notes, each lasting 19–25 ms released at a rate of 29.2–34.7/s, and with dominant frequency peaking between 2472–2809 Hz. Rhinella merianae calls last 4.0–7.1, have 153–217 notes, each lasting 17–20 ms, released at a rate of 37.7–39.5/s, and with dominant frequency peaking between 2959–3189 Hz. Both species are distinguished from most other species of the R. granulosa species group by the combination of pulse number and dominant frequency. Our data on R. granulosa differed (p < 0.05) in call duration and/or in dominant frequency from specimens from Natal (Rio Grande do Norte state) and Cabaceiras (Paraíba state). Our data on R. merianae appear to differ in dominant frequency from the only call (a single male) known from the Amazon River bank. The differences we found between our data and published call data suggest that further study of calls of additional populations of these species is warranted.

Geographic Variation in Calls of Males and Determination of Species Boundaries in Tetraploid Frogs of the Australian Genus Neobatrachus (Myobatrachidae)

1997 ◽  
Vol 45 (2) ◽  
pp. 95 ◽  
Author(s):  
J. D. Roberts
Keyword(s):  
Geographic Variation ◽  
Pulse Duration ◽  
Pulse Rate ◽  
Rise Time ◽  
South Australia ◽  
Dominant Frequency ◽  
Advertisement Call ◽  
Eastern Australia ◽  
The Status

I analysed geographic variation in advertisement call of tetraploid forms of Neobatrachus. Comparing five regional samples spanning the range of N. kunapalari, there was significant geographic variation in pulses per call but not in dominant frequency, pulse rate, pulse duration or percentage rise time. The call of N. kunapalari was significantly different from four other samples covering the geographic range of tetraploid forms across Australia in all but percentage rise time. Calls of frogs from Mt Magnet in Western Australia (WA) differed from calls from Port Hedland (WA) in pulse duration and in multivariate descriptions but were similar in pulse rate. Pulse rates of calls from N. centralis on Eyre Peninsula in South Australia (SA) were distinct from all other populations sampled but in multivariate space these calls were similar to calls of N. sudellifrom eastern Australia. There may be an eastwest cline in call from N. sudelli to calls of N. aquilonius and N. centralis in WA. Call data support the recognition of two tetraploid species: N. kunapalari and N. sudelli. N. sudelli exhibits geographic variation in call, but the status of N. aquilonius and N. centralis as possible synonyms of N. sudelli was not resolved.

Advertisement call of Peltophryne florentinoi (Anura: Bufonidae), an endemic toad from Zapata Swamp, Cuba

2010 ◽  
Vol 31 (2) ◽  
pp. 265-272 ◽  
Author(s):  
Roberto Alonso ◽  
Maike Hernández ◽  
Ariel Rodríguez
Keyword(s):  
Pulse Rate ◽  
Dominant Frequency ◽  
The Other ◽  
Acoustic Properties ◽  
Advertisement Call ◽  
Advertisement Calls ◽  
Call Duration ◽  
Temporal Properties ◽  
Temporal Features ◽  
Long Duration

AbstractThe advertisement call of Peltophryne florentinoi, an endemic toad from Zapata Swamp, Matanzas, Cuba, is described in terms of temporal properties and dominant frequency. A comparison with the advertisement calls produced by the other three species of large toads in Cuba (P. peltocephala, P. fustiger and P. taladai) is also provided. Like other large toads from Cuba, P. florentinoi produces advertisement calls with long duration (> 10 s), low dominant frequency (< 1 kHz), and a series of complex pulses that are composed of two to five sub-pulses. All temporal features of the P. florentinoi call are significantly different from P. fustiger calls: number of pulses, pulse duration, and pulse rate separates it from P. peltocephala. P. florentinoi differs from P. taladai in call duration, number of pulses, and pulse rate. The occurrence of different types of complex pulses differed in all species studied. Typically, P. florentinoi pulses contain three sub-pulses, P. taladai four, and P. fustiger and P. peltocephala contain two sub-pulses. The dominant frequency of the advertisement call of P. florentinoi did not differ from the other species' calls. Call duration and pulse rate are the most useful acoustic properties to distinguish P. florentinoi advertisement calls from those of the other three large Cuban toads.

Studies on populations of potorous Desmarest (Marsupialia) II. Electrophoretic, chromosomal and breeding studies

1977 ◽  
Vol 25 (4) ◽  
pp. 733 ◽  
Author(s):  
PG Johnston ◽  
GB Sharman
Keyword(s):  
Geographic Variation ◽  
Morphological Variation ◽  
Genetic Similarity ◽  
Genetic Basis ◽  
Chromosomal Variation ◽  
Blood Proteins ◽  
Electrophoretic Variation ◽  
South Eastern ◽  
Eastern Australia ◽  
South Eastern Australia

Geographic variation in potoroos (genus Potorous) from south-eastern Australia and Tasmania was investigated by electrophoretic and chromosomal techniques. Six of the 10 potoroo blood proteins examined showed electrophoretic variation and the genetic basis of three of these was established by breeding studies. Levels of genic heterozygosity were similar in Tasmanian and mainland populations. Coefficients of genetic similarity based on 10 loci indicated that potoroos from Tasmania and the Bass Strait islands are similar to each other but different from those of mainland Australia. No chromosomal variation was observed in potoroos examined from south-eastern Australia and Tasmania. Crosses between animals from these regions produced fertile offspring. It is concluded from this study and a related investigation on morphological variation that the genus Potorous should be separated into two species, P. platyops and P. tridactylus, with the further subdivision of the latter species into P.t. tridactylus from mainland Australia (including P. gilberti) and P.t. apicalis from Tasmania and the Bass Strait islands.

Geographic Variation in an Australian Species of Chaoborus (Diptera: Culicidae)

1983 ◽  
Vol 31 (1) ◽  
pp. 15
Author(s):  
DH Colless
Keyword(s):  
Principal Component Analysis ◽  
Geographic Variation ◽  
Wing Length ◽  
Principal Component ◽  
Latitudinal Variation ◽  
Complex Character ◽  
Australian Species ◽  
South Eastern ◽  
Adult Wing ◽  
Eastern Australia

Populations of an unnamed species of Chaoborus vary geographically in south-eastern Australia, along what appears to be a north-south cline. At least five characters are involved: in the adult, wing length and the colour of the style of the male coxite; in the larva, overall size, a complex character that includes relative breadth of the head, and degree of development of oesophageal molars. The dimensional characters of the larva were synthesized by means of principal component analysis; they show significant regressions on temperature. Latitudinal variation in size also occurs in the mosquitoes Anopheles annulipes and Culex vigilax, illustrating the occurrence in Culicidae of something analogous to 'Bergman's Rule' (of homoiotherms).

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