scholarly journals Induced expression of a vestigial sexual signal

2018 ◽  
Vol 14 (5) ◽  
pp. 20180095 ◽  
Author(s):  
David A. Gray ◽  
Scherezade Hormozi ◽  
Fritz R. Libby ◽  
Randy W. Cohen
Keyword(s):  
Morphological Traits ◽  
Rapid Evolution ◽  
Calling Song ◽  
Command Neurons ◽  
Induced Expression ◽  
Sexual Signal ◽  
Calling Behaviour ◽  
Sexual Behaviours ◽  
Male Calling ◽  
Pattern Generators

Vestigial morphological traits are common and well known in a variety of taxa. Identification of vestigial genes has illustrated the potential for evolutionary reversals and the re-expression of atavistic traits. Here we induce expression of a behavioural sexual signal, male calling song, in a cricket species, Gryllus ovisopis, which lacks a functional calling song. We successfully used acetylcholine injections in the frontal space of the head of male crickets to activate cerebral command neurons for cricket calling, and we recorded calling songs with a temporal chirp pattern similar to that of G. ovisopis ' close evolutionary relatives, G. firmus and G. pennsylvanicus , implying that the neural pattern generators that underlie cricket calling behaviour persist in a vestigial state in G. ovisopis . To our knowledge, this is the first demonstration of the induced expression of a vestigial behaviour in any organism. The retention of latent neural capacity to express sexual behaviours could have important implications for rapid evolution, trait re-emergence and reproductive isolation.

scholarly journals Neoxabea mexicana sp. nov. (Gryllidae: Oecanthinae): A new species from Mexico and a key for Neoxabea in North and Central America

2021 ◽  
Vol 30 (2) ◽  
pp. 99-106
Author(s):  
Nancy Collins ◽  
Carlos Gerardo Velazco-Macias
Keyword(s):  
New Species ◽  
Central America ◽  
Calling Song ◽  
Sound Recordings ◽  
Tree Cricket ◽  
The Status ◽  
Male Calling ◽  
The Common ◽  
A New Species ◽  
Rule Out

A new species of tree cricket, Neoxabea mexicanasp. nov., is described from northeast Mexico. Although it has morphological similarities to two other species found in Mexico, there are distinguishing characters, such as a well-developed tubercle on the pedicel, black markings on the maxillary palpi, one of the two pairs of spots on the female wings positioned at the base of the wings, stridulatory teeth count, and the pulse rate of the male calling song. The calling song description and pre-singing stuttering frequencies are provided. Character comparisons that rule out other species in the genus are presented. The common name given to this new species is Mexican tree cricket. Sound recordings and video are available online. We also make some clarification of the status of Neoxabea formosa (Walker, 1869), described as Oecanthus formosus, and present a key of Neoxabea in North and Central America.

Bioacoustics review of Anatolian species of the predatory bush-cricket genus Saga (Orthoptera: Tettigoniidae: Saginae) with the description of a new species

Zootaxa ◽  
2019 ◽  
Vol 4664 (1) ◽  
pp. 83-102
Author(s):  
DENİZ ŞİRİN ◽  
MEHMET SAİT TAYLAN ◽  
HASAN SEVGİLİ ◽  
ABBAS MOL
Keyword(s):  
New Species ◽  
Field Studies ◽  
Calling Song ◽  
Palaearctic Region ◽  
Structural Investigations ◽  
Distribution Maps ◽  
South Eastern ◽  
Male Calling ◽  
A New Species ◽  
Bush Cricket

The genus Saga is a genus of generally large predatory bush-cricket species. It includes 13 taxa in the Palaearctic region. In this research, eight species belonging to Saga (Tettigoniidae, Saginae) were sampled during field studies in different regions of Anatolia of Turkey between 2010 and 2018 (except one specimen). The bioacoustic parameters of these species recorded during the field or in laboratory conditions and the male calling song descriptions, as well as the oscillographic illustrations and distribution maps are given. A new population of Saga found from the South-Eastern Taurus (Hakkari province), which is affiliated to a new species and shows similarity to S. ephippigera, along with the morphological and bioacoustical descriptions of Saga hakkarica sp. n. Şirin & Taylan from Turkey, are also given. The relationships between the new species and the closest taxa are discussed using morphological and bioacoustical characters. The structural investigations of the male calling songs reveal three different bioacoustic groups affiliated to eight Anatolian Saga species; as (i) Ephippigera group (S. syriaca + (S. ephippigera + Saga hakkarica), (ii) Natoliae group (S. natoliae + (S. beieri + (S. longicaudata + S. puella) and (iii) S. cappadocica. 

scholarly journals Isophya sicula sp. n. (Orthoptera: Tettigonioidea), a new, morphologically cryptic bush-cricket species from the Eastern Carpathians (Romania) recognized from its peculiar male calling song

Zootaxa ◽  
2010 ◽  
Vol 2627 (1) ◽  
pp. 57 ◽  
Author(s):  
KIRILL MÁRK ORCI ◽  
GERGELY SZÖVÉNYI ◽  
BARNABÁS NAGY
Keyword(s):  
Acoustic Signals ◽  
Pair Formation ◽  
Descriptive Statistics ◽  
Calling Song ◽  
Syllable Type ◽  
Morphometric Characters ◽  
Female Response ◽  
Eastern Carpathians ◽  
Male Calling ◽  
Bush Cricket

The morphology and pair-forming acoustic signals of Isophya sicula sp. n., a new phaneropterine bush-cricket species from the Eastern Carpathians (Romania) is described. The species is morphologically similar to I. posthumoidalis and I. camptoxypha, but the male calling song differs clearly from the songs of those species. The male calling song is a long series of evenly repeated, very short syllables. Syllables are much shorter than in I. camptoxypha, and the song is composed from only one syllable type differently from I. posthumoidalis, where the male calling song is composed of two syllable types. Pair formation is achieved during an acoustic duet. The delay of female response (40–70 ms) is shorter than in I. camptoxypha and I. posthumoidalis. Basic descriptive statistics of sonometric and morphometric characters of the new species as well as SEM photos of the male stridulatory file and female stridulatory bristles are presented.

Description and bioacoustics of a new species of the genus Isophya (Orthoptera: Tetigoniidae: Phaneropterinae) from Turkey

Zootaxa ◽  
2012 ◽  
Vol 3361 (1) ◽  
pp. 33-44 ◽  
Author(s):  
HASAN SEVGİLİ ◽  
ALİ DEMİRSOY ◽  
BATTAL ÇIPLAK
Keyword(s):  
New Species ◽  
Related Species ◽  
Additional Data ◽  
Morphological Characters ◽  
Calling Song ◽  
Closely Related Species ◽  
Male And Female ◽  
Black Sea Region ◽  
Male Calling ◽  
A New Species

A new species for the genus Isophya, I. bumerangoides, is described from the Northeastern Black Sea Region of Turkey. Thenew species differs from closely related species in some aspects of morphology, mainly in male and female genitalia. Illustra-tions of external morphological characters and male and female songs are provided. Additional data on male calling song andfemale song of closely related bush-cricket Isophya rizeensis Sevgili, 2003 are also given. Scanning Electron Microscopeimages of stridulatory file of the other related species I. redtenbacheri Adelung, 1907 are provided. I. bumerangoides clearlybelongs to I. amplipennis group. Our bioacoustic results suggest that within the genus Isophya, changes in calling song seem to appear more slowly than those in external morphological characters as in most tettigoniid.

Female choice and plasticity of male calling behaviour in the Pacific treefrog

1999 ◽  
Vol 57 (6) ◽  
pp. 1337-1342 ◽  
Author(s):  
ELIOT A. BRENOWITZ ◽  
GARY J. ROSE
Keyword(s):  
Female Choice ◽  
Calling Behaviour ◽  
The Pacific ◽  
Male Calling ◽  
Pacific Treefrog

scholarly journals Obligately silent males sire more offspring than singers in a rapidly evolving cricket population

2019 ◽  
Vol 15 (7) ◽  
pp. 20190198 ◽  
Author(s):  
Justa L. Heinen-Kay ◽  
Ellen M. Urquhart ◽  
Marlene Zuk
Keyword(s):  
Evolutionary Biology ◽  
Rapid Evolution ◽  
Calling Song ◽  
Wild Populations ◽  
Field Crickets ◽  
Offspring Production ◽  
In The Wild ◽  
Sexual Traits ◽  
Acoustic Experience ◽  
Older Males

How sexual traits are gained and lost in the wild remains an important question in evolutionary biology. Pacific field crickets ( Teleogryllus oceanicus ) in Hawaii provide an unprecedented opportunity to investigate the factors facilitating evolutionary loss of a sexual signal in real time. Natural selection from an acoustically orienting parasitoid fly drove rapid evolution of a novel, silent male morph. While silent (flatwing) males enjoy protection from the fly, they face difficulty attracting mates. We tested how offspring production varies in association with three male attributes affected by the spread of flatwing: wing morph (flatwing or normal-wing), age (flatwings should survive longer than singers) and exposure to calling song during rearing (wild populations with many flatwings lack ambient calling song). Per mating event, flatwings sired more offspring than singers and older males were mounted more quickly by females when presented with standard courtship song. Despite prior work showing that male age and acoustic experience influence sperm characteristics associated with fertilization, age and song exposure had no influence on male offspring production per mating. This represents the first evidence that the silent male morph possesses a reproductive advantage that may help compensate for precopulatory barriers to mate attraction.

scholarly journals Crickets of the subfamily Eneopterinae (Orthoptera: Grylloidea) from Sandakan, Sabah: one new species and calling songs of a sympatric species

Zootaxa ◽  
2019 ◽  
Vol 4619 (2) ◽  
pp. 347-363
Author(s):  
MING KAI TAN ◽  
RAZY JAPIR ◽  
ARTHUR Y.C. CHUNG ◽  
TONY ROBILLARD
Keyword(s):  
New Species ◽  
Southeast Asia ◽  
Sympatric Species ◽  
Calling Song ◽  
Lack Of Information ◽  
Male Calling ◽  
First Time ◽  
One New Species

Orthoptera from Sandakan, Sabah are relatively understudied compared to some other parts of Borneo, and lack of information of species there can impede our understanding of the origins and biodiversity of orthopterans in Borneo and, in general, Southeast Asia. Based on a recent orthopteran survey in Sandakan, one new species of Lebinthus Stål is described: Lebinthus sandakan sp. nov. The male calling song of this new species is also presented. The calling song of Cardiodactylus borneoe Robillard & Gorochov, 2014 is also described for the first time. 

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