Intraspecific variation and interspecific differences in sex pheromones of sibling species inCtenopseustis obliquana complex

1991 ◽  
Vol 17 (2) ◽  
pp. 413-429 ◽  
Author(s):  
J. R. Clearwater ◽  
S. P. Foster ◽  
S. J. Muggleston ◽  
J. S. Dugdale ◽  
E. Priesner
Keyword(s):  
Intraspecific Variation ◽  
Sibling Species ◽  
Sex Pheromones ◽  
Interspecific Differences

Evolutionary importance of intraspecific variation in sex pheromones

2021 ◽  
Author(s):  
Chiara De Pasqual ◽  
Astrid T. Groot ◽  
Johanna Mappes ◽  
Emily Burdfield-Steel
Keyword(s):  
Intraspecific Variation ◽  
Sex Pheromones

Intraspecific variation of two components in sex pheromone gland ofPlanotortrix excessana sibling species

1989 ◽  
Vol 15 (2) ◽  
pp. 457-465 ◽  
Author(s):  
S. P. Foster ◽  
J. R. Clearwater ◽  
S. J. Muggleston
Keyword(s):  
Sex Pheromone ◽  
Intraspecific Variation ◽  
Sibling Species ◽  
Pheromone Gland ◽  
Sex Pheromone Gland

scholarly journals Sequences of the second internal transcribed spacer of ribosomal DNA for three species of Trichostrongylus (Nematoda: Trichostrongylidae) from sheep in Russia

2007 ◽  
Vol 44 (2) ◽  
pp. 43-46 ◽  
Author(s):  
D. Kuznetsov ◽  
N. Kuznetsova
Keyword(s):  
Dna Sequence ◽  
Intraspecific Variation ◽  
Ribosomal Dna ◽  
Internal Transcribed Spacer ◽  
Sequence Data ◽  
Moscow Region ◽  
Dna Sequence Data ◽  
Interspecific Differences ◽  
Second Internal Transcribed Spacer ◽  
First Time

AbstractFor the first time, DNA sequence data were obtained for three species of Trichostrongylus from Russia. Internal transcribed spacer (ITS-2) of ribosomal DNA was sequenced for T. axei, T. colubriformis and T. probolurus from sheep from the Moscow region. ITS-2 rDNA length was estimated as 238 nucleotides for T. colubriformis and T. probolurus and 237 nucleotides for T. axei. The G+C content of the ITS-2 sequences of T. colubriformis, T. axei and T. probolurus were 31 %, 32 % and 34 % respectively. The level of interspecific differences in ITS-2 of rDNA of T. axei, T. probolurus and T. colubriformis ranged from 3 to 4 %. The ITS-2 sequences from the Russian specimens were compared with those of T. axei, T. probolurus and T. colubriformis from Australia and Germany. Intraspecific variation ranged from 0 % in T. colubriformis to 3.0 % in T. axei.

BIOSYSTEMATICS OF THE GENUS EUXOA (LEPIDOPTERA: NOCTUIDAE). XVIH. COMPARATIVE BIOLOGY AND EXPERIMENTAL TAXONOMY OF THE SIBLING SPECIES EUXOA RIDMGSIANA (GRT.) AND EUXOA MAIMES (SM.)

1985 ◽  
Vol 117 (4) ◽  
pp. 481-493 ◽  
Author(s):  
J.R. Byers ◽  
D.L. Struble ◽  
J.D. Lafontaine
Keyword(s):  
Life Cycle ◽  
Reproductive Isolation ◽  
Sibling Species ◽  
Mate Recognition ◽  
Recognition System ◽  
Flight Period ◽  
Interspecific Differences ◽  
Mate Recognition System ◽  
The Difference ◽  
Species Specific

AbstractThe species previously recognized as Euxoa ridingsiana (Grt.) is shown to be composed of a sympatric pair of sibling species, Euxoa ridingsiana (Grt.) and Euxoa maimes (Sm.), which in the laboratory will produce viable F1 hybrids but no F2. Results of F1 sib and backcrosses show that the F1 males are fertile and the F1 females are infertile. In mating-bias tests conducted in laboratory cages, 74% of matings were conspecific and 26% interspecific. Differences in the diel periodicities of mating, which are about 2 h out of phase, may account for the mating bias. The duration of development of E. ridingsiana in the laboratory and its seasonal flight period in the field are about 2 weeks in advance of that of E. maimes. However, there is considerable overlap of the flight periods and, with the tendency of females of both species to mate several times, it is unlikely that the difference in seasonal emergence is enough to effect reproductive isolation. It is evident that, under natural conditions, reproductive isolation can be maintained entirely by species-specific sex pheromones. This mechanism of reproductive isolation is, however, apparently ineffective when moths are confined in cages in the laboratory.Biogeographic considerations suggest that the differences in life-cycle timing and mating periodicities might have been adaptations to adjust development and reproduction to prevailing ancestral environments. If the initial differentiation of the 2 species occurred in isolation and included at least an incipient shift in the pheromonal mate-recognition system, it is possible that upon reestablishment of contact between ancestral populations the differences in life-cycle timing and mating periodicities acting in concert could have effected substantial, albeit incomplete, reproductive isolation. Subsequent selection to reinforce assortative mating to preserve coadapted gene complexes could then have resulted in differentiation of discrete pheromonal systems and attainment of species status.

Genetic identification of two sibling species of Lutzomyia longipalpis (Diptera: Psychodidae) that produce distinct male sex pheromones in Sobral, Ceará State, Brazil

2003 ◽  
Vol 12 (7) ◽  
pp. 1879-1894 ◽  
Author(s):  
R. D. C. Maingon ◽  
R. D. Ward ◽  
J. G. C. Hamilton ◽  
H. A. Noyes ◽  
N. Souza ◽  
...  
Keyword(s):  
Sibling Species ◽  
Sex Pheromones ◽  
Genetic Identification ◽  
Lutzomyia Longipalpis ◽  
Male Sex

scholarly journals Evolutionary importance of intraspecific variation in sex pheromones

2021 ◽  
Author(s):  
Chiara De Pasqual ◽  
Astrid T. Groot ◽  
Johanna Mappes ◽  
Emily Burdfield-Steel
Keyword(s):  
Intraspecific Variation ◽  
Sex Pheromones

Discrimination between two sibling species of Acroperus (Baird, 1843) from the Palearctic (Cladocera: Anomopoda: Chydoridae)

Zootaxa ◽  
2009 ◽  
Vol 2176 (1) ◽  
pp. 1-21 ◽  
Author(s):  
ARTEM Y. SINEV
Keyword(s):  
Differential Diagnosis ◽  
Intraspecific Variation ◽  
Sibling Species ◽  
Diagnostic Feature ◽  
The Family ◽  
Males And Females ◽  
Postembryonal Development ◽  
Body Shapes ◽  
First Time

Morphology and differential diagnosis of two common Eurasian but frequently confused Eurasian cladocerans, Acroperus harpae (Baird, 1834) and A. angustatus Sars, 1863, was investigated. Validity of both species is confirmed. A significant intraspecific variation in body shapes, unusual for species of the family Chydoridae, is present in females of both species. This “traditional” character is unreliable as diagnostic feature. Prominent differences between two species are revealed in antennal morphology, used for identification of all instars of males and females. Detailed morphology of males, postembryonal development of both males and females was studied in details for the first time. Our data suggest that two other European Acroperus taxa, A. neglectus Lilljeborg, 1900 and A. alonoides Hudendorff, 1876, are junior synonyms.

Visual and Acoustic Display in Uca Mordax and U. Burgersi, Sibling Species of Neotropical Fiddler Crabs. Ii. Vibration Signals

Behaviour ◽  
1984 ◽  
Vol 91 (1-3) ◽  
pp. 204-227 ◽  
Author(s):  
Heinrich-Otto VON HAGEN
Keyword(s):  
Sibling Species ◽  
Character Displacement ◽  
Fiddler Crabs ◽  
Vibration Signals ◽  
Allopatric Populations ◽  
Interspecific Differences ◽  
Waving Display ◽  
Starting Point ◽  
The Common ◽  
Species Specific

AbstractThe sibling species of fiddler crabs, Uca mordax and U. burgersi, which are very similar in respect to morphology and many traits of their waving display (see part I of this study), were studied bioacoustically in Trinidad (W.I.). When recording their vibration signals (mainly in the laboratory) it was, at the same time, possible to directly observe the animals' underground activities. The dominant vibration signals of the two species were found to be extremely different: males of U. mordax emit rapping sounds ("drumwhirls") by ambulatory percussion, whereas males of U. burgersi produce "howling" sounds (with a varying number of harmonics) by cheliped convulsion, i.e. inconspicuous quivering movements of this appendage. Similar interspecific differences exist in the fainter vibration signals of females. Each of the two species is capable of producing other signals in addition to the prevalent ones mentioned: U. mordax can emit cheliped vibrations as well (though percussive ones) and U. burgersi can also produce ambulatory "drumwhirls". From these and other basic similarities and from comparisons with recordings of burgersi sounds from Colombia and allopatric populations in Florida, the common starting-point and the different evolutionary pathways leading to the two species-specific termini of acoustic display are reconstructed. The extreme differences that were found for the sympatric situation in Trinidad are regarded as an example of character displacement. Apparently, the acoustic communication system of these crabs is much more affected by character displacement than the visual one.

scholarly journals Chromosome studies in southern Brazilian wheat pest aphids Sitobion avenae, Schizaphis graminum, and Methopolophium dirhodum (Homoptera: Aphididae)

1997 ◽  
Vol 20 (3) ◽  
pp. 415-419 ◽  
Author(s):  
Verónica E. Rubín de Celis ◽  
Dirceu N. Gassen ◽  
Marisa C. Santos-Colares ◽  
Alice K. Oliveira ◽  
Vera L.S. Valente
Keyword(s):  
Intraspecific Variation ◽  
Aphid Species ◽  
Sitobion Avenae ◽  
Schizaphis Graminum ◽  
The Other ◽  
Differential Staining ◽  
Economic Interest ◽  
Interspecific Differences

We examined the chromosome set of the aphid species Sitobion avenae, Schizaphis graminum and Methopolophium dirhodum by means of conventional staining and C, NOR, AluI and HaeIII banding methods. These species are considered important pests to several plants of economic interest in Brazil. No variation was observed in the number of chromosomes of S. avenae, whereas there was intraspecific variation in the other two species. Interspecific differences in the response to the banding treatments were observed. Whereas these techniques allowed the identification of several S. graminum chromosome pairs, only the AluI treatment was capable of inducing differential staining in the M. dirhodum chromosomes and no clear patterns emerged when the S. avenae preparations were treated

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