Results 21 to 30 of about 6,560 (134)

Diet-Induced Developmental and Morphological Plasticity in a Thelytokous Predatory Mite <i>Amblyseius herbicolus</i> (Chant) (Acari: Phytoseiidae). [PDF]

open access: yesEcol Evol
This study investigated how variation in prey consumption influences immature development and adult morphometric traits in the predatory mite Amblyseius herbicolus. Mites that ate more prey attained a larger size at maturity but did not develop more rapidly. Several morphometric traits were also significantly influenced by diet.
Zhang K, Zhang ZQ.
europepmc   +2 more sources

Facultative use of thelytokous parthenogenesis for queen production in the polyandrous ant Cataglyphis cursor [PDF]

open access: yesJournal of Evolutionary Biology, 2013
AbstractThe evolutionary paradox of sex remains one of the major debates in evolutionary biology. The study of species capable of both sexual and asexual reproduction can elucidate factors important in the evolution of sex. One such species is the ant Cataglyphis cursor, where the queen maximizes the transmission of her genes by producing new queens ...
C. Doums   +7 more
semanticscholar   +5 more sources

No Mate, No Problem: Molecular Mechanisms Involved in Parthenogenesis in the Cosmopolitan Earthworm Aporrectodea trapezoides (Annelida, Clitellata). [PDF]

open access: yesMol Ecol
ABSTRACT Approximately, 40% of earthworm species can reproduce by parthenogenesis. This is the case for the cosmopolitan species, Aporrectodea trapezoides, although sexual forms have been described sporadically. We analyse the genotypes and microbiomes of 30 individuals from four localities where both forms appear in order to understand the ...
de Sosa I   +9 more
europepmc   +2 more sources

A single locus determines thelytokous parthenogenesis of laying honeybee workers (Apis mellifera capensis) [PDF]

open access: yesHeredity, 2005
The evolution and maintenance of parthenogenetic species are a puzzling issue in evolutionary biology. Although the genetic mechanisms that act to restore diploidy are well studied, the underlying genes that cause the switch from sexual reproduction to parthenogenesis have not been analysed. There are several species that are polymorphic for sexual and
H. Michael G. Lattorff   +2 more
semanticscholar   +3 more sources

Evaluation of asexual Wolbachia-infected Trichogramma brassicae performance in greenhouse and field conditions [PDF]

open access: yesنامه انجمن حشره‌شناسی ایران, 2023
In some Trichogramma species, parthenogenesis is mostly induced by intracellular symbiotic Wolbachia bacteria. Populations of this egg parasitoid wasp that produce more female progeny can potentially have higher fitness.
Shahram Farrokhi   +3 more
doaj   +1 more source

Reproductive Transitions and Sperm Utilisation in a Facultatively Parthenogenetic Stick Insect. [PDF]

open access: yesEcol Evol
Facultative parthenogenesis enables females to switch from asexual (parthenogenetic) to sexual reproduction after mating, but the process of fertilisation is poorly understood in such animals. It is unknown whether switching reproductive modes requires changes in the eggs themselves, delaying the transition from laying unfertilised to fertilised eggs ...
Boldbaatar J   +4 more
europepmc   +2 more sources

Population genetic structure, worker reproduction and thelytokous parthenogenesis in the desert ant Cataglyphis sabulosa [PDF]

open access: yesHeredity, 2008
In social Hymenoptera, within-colony relatedness is usually high due to the haplodiploid sex-determining system. However, factors such as the presence of multiple reproductive queens (polygyny), multiple queen matings (polyandry) or worker reproduction result in decreased relatedness among workers and the brood they rear, and consequently dilute their ...
I. Timmermans   +3 more
semanticscholar   +3 more sources

Coevolution and Functional Effects of Endosymbiotic <i>Rickettsia</i> in <i>Leptocybe invasa</i> Fisher & LaSalle (Hymenoptera: Eulophidae) Across China. [PDF]

open access: yesEcol Evol
Two distinct lineages of L. invasa and the dominant endosymbiont, Rickettsia, was identified, followed by an analysis of its infection density across various developmental stages and tissues of L. invasa. Furthermore, two distinct strains of the Rickettsia endosymbiont were detected, and the phylogenetic relationships between these strains and their L.
Xu X   +5 more
europepmc   +2 more sources

Thelytokous parthenogenesis in the damselfly Ischnura hastata (Odonata, Coenagrionidae): genetic mechanisms and lack of bacterial infection [PDF]

open access: yesHeredity, 2009
Thelytokous parthenogenesis, the production of female-only offspring from unfertilized eggs, has been described in all the insect orders, but is a rare phenomenon in the Odonata (dragonflies and damselflies). The only-known case of parthenogenesis in this group is the North American damselfly species Ischnura hastata, which has parthenogenetic ...
M. O. LORENZO-CARBALLA   +1 more
semanticscholar   +4 more sources

Comprehensive analysis of male-free reproduction in Monomorium triviale (Formicidae: Myrmicinae).

open access: yesPLoS ONE, 2021
We report comprehensive evidence for obligatory thelytokous parthenogenesis in an ant Monomorium triviale. This species is characterized by distinct queen-worker dimorphism with strict reproductive division of labor: queens produce both workers and new ...
Naoto Idogawa   +3 more
doaj   +1 more source

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