Results 31 to 40 of about 16,862 (239)

When size and shape matter: morphometric characterization of two sympatric dragonflies of the genus Perithemis (Odonata: Libellulidae)

open access: yesAnais da Academia Brasileira de Ciências, 2023
Perithemis mooma, Kirby, 1889 and Perithemis icteroptera (Selys in Sagra, 1857) live in sympatry from southern Brazil to central Argentina. The taxonomy of the genus Perithemis Hagen, 1861 has been hampered by the use of characters that are highly ...
STEPHANIE TARRÍS-SAMANIEGO   +2 more
doaj   +1 more source

Exploring protandry and pupal size selection for Aedes albopictus sex separation [PDF]

open access: yes, 2018
Background: We explored the possibility to improve male/female separation (sexing) in Aedes albopictus by selection of two strains, one toward increasing sex dimorphism and another toward increasing protandry.
Balestrino, Fabrizio   +4 more
core   +1 more source

Silencing of two insulin receptor genes disrupts nymph-adult transition of alate brown citrus aphid [PDF]

open access: yes, 2017
Insulin receptors play key roles in growth, development, and polymorphism in insects. Here, we report two insulin receptor genes (AcInR1 and AcInR2) from the brown citrus aphid, Aphis (Toxoptera) citricidus.
Ding, Bi-Yue   +7 more
core   +2 more sources

Variation in the morphology of the wings of the endangered grass-feeding butterfly Coenonympha oedippus (Lepidoptera: Nymphalidae) in response to contrasting habitats

open access: yesEuropean Journal of Entomology, 2018
At the southern limit of its range the endangered butterfly Coenonympha oedippus inhabits grasslands (wet, dry) that differ significantly in the abundance of its larval hostplants (wet > dry) and mean annual air temperature (wet < dry).
Jure JUGOVIC   +3 more
doaj   +1 more source

A new female-like morph of juvenile male Levant Sparrowhawk (Accipiter brevipes) – Sexual mimicry to avoid intra-specific predation? [PDF]

open access: yes, 2015
In migrant Levant Sparrowhawk (Accipiter brevipes) at Eilat, Israel, we noted that juvenile males had two different morphs – the one described to date in literature; and a second, previously undescribed morph, with femalelike barring on the ...
Fornasari, Lorenzo, Yosef, Reuven
core   +3 more sources

Wing Dimorphism in Weevils [PDF]

open access: yesNature, 1928
IN a reference which appeared in NATURE of July 28, p. 144, to my paper on the inheritance of long and short wings in the weevil, Sitona hispidula (Trans. Boy. Soc. Edin., vol. 55, part 3, No. 27), a statement occurs which it is desirable to correct. It is stated in the note that evidence from breeding indicates that the abnormal condition of the wing ...
openaire   +1 more source

Wing sexual dimorphism in Aedes fluviatilis (Diptera: Culicidae)

open access: yesInfection, Genetics and Evolution, 2016
Culicidae mosquitoes are important vectors of pathogens; however, males and females have different responses to selective pressures, leading to distinct evolutionary outcomes. A better understanding of this phenomenon is crucial to establish effective control strategies for this mosquito.
Rafael de Oliveira, Christe   +3 more
openaire   +2 more sources

Pea aphid winged and wingless males exhibit reproductive, gene expression, and lipid metabolism differences

open access: yesCurrent Research in Insect Science, 2022
Alternative, intraspecific phenotypes offer an opportunity to identify the mechanistic basis of differences associated with distinctive life history strategies.
Omid Saleh Ziabari   +5 more
doaj   +1 more source

A morphological and molecular description of a new Teleopsis species (Diptera: Diopsidae) from Thailand [PDF]

open access: yes, 2007
A new species of Teleopsis (Diptera, Diopsidae) from Chiang Mai, Thailand is described and illustrated. Teleopsis thaii Földvári & Carr is shown to be a member of a species group, termed the dalmanni species group, along with three previously described ...
Carr, Martin   +3 more
core   +1 more source

Are there sex differences in the body size of the Eurasian red squirrel in Slovakia? [PDF]

open access: yes, 2015
Sexual dimorphism of the Eurasian red squirrel on five somatic variables (head-and-body length, tail length, hind foot length, ear length and body weight) was evaluated on 55 squirrels.
Krišovský, Peter   +2 more
core   +2 more sources

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