Results 31 to 40 of about 5,512 (215)

Immune competence and spleen size scale with colony status in the naked mole-rat

open access: yesOpen Biology, 2022
Naked mole-rats (NM-R; Heterocephalus glaber) live in multi-generational colonies with a social hierarchy, and show low cancer incidence and long life-spans. Here we asked if an immune component might underlie such extreme physiology.
Valérie Bégay   +6 more
doaj   +1 more source

Psychopathy, adaptation, and disorder [PDF]

open access: yes, 2013
In a recent study, we found a negative association between psychopathy and violence against genetic relatives. We interpreted this result as a form of nepotism and argued that it failed to support the hypothesis that psychopathy is a mental disorder ...
Craig eSheriff   +5 more
core   +2 more sources

Genes associated with ant social behavior show distinct transcriptional and evolutionary patterns

open access: yeseLife, 2015
Studies of the genetic basis and evolution of complex social behavior emphasize either conserved or novel genes. To begin to reconcile these perspectives, we studied how the evolutionary conservation of genes associated with social behavior depends on ...
Alexander S Mikheyev   +1 more
doaj   +1 more source

What Kills the Hindgut Flagellates of Lower Termites during the Host Molting Cycle?

open access: yesMicroorganisms, 2017
Subsocial wood feeding cockroaches in the genus Cryptocercus, the sister group of termites, retain their symbiotic gut flagellates during the host molting cycle, but in lower termites, closely related flagellates die prior to host ecdysis.
Christine A. Nalepa
doaj   +1 more source

Colony size predicts division of labour in Attine ants [PDF]

open access: yes, 2014
Division of labour is central to the ecological success of eusocial insects, yet the evolutionary factors driving increases in complexity in division of labour are little known.
Alexander RD   +10 more
core   +3 more sources

Discrete but variable structure of animal societies leads to the false perception of a social continuum [PDF]

open access: yesRoyal Society Open Science, 2016
Animal societies are typically divided into those in which reproduction within a group is monopolized by a single female versus those in which it is shared among multiple females.
Dustin R. Rubenstein   +2 more
doaj   +1 more source

Notes on the Nests of \u3ci\u3eAugochloropsis metallica fulgida\u3c/i\u3e and \u3ci\u3eMegachile mucida\u3c/i\u3e in Central Michigan (Hymenoptera: Halictidae, Megachilidae) [PDF]

open access: yes, 2017
Notes on the nesting biology of two ground-nesting species are provided from Central Michigan. A single nest of Augochloropsis metallica fulgida was excavated on 12 July 2014 in Shiawassee County. There were two female nest inhabitants.
Gibbs, Jason
core   +2 more sources

Social Evolution With Decoupling of Multiple Roles of Biogenic Amines Into Different Phenotypes in Hymenoptera

open access: yesFrontiers in Ecology and Evolution, 2021
Convergent evolution of eusociality with the division of reproduction and its plastic transition in Hymenoptera has long attracted the attention of researchers.
Ken Sasaki   +5 more
doaj   +1 more source

‘Viral’ hunts? A cultural Darwinian analysis of witch persecutions [PDF]

open access: yes, 2019
The theory of Darwinian cultural evolution is gaining currency in many parts of the socio-cultural sciences, but it remains contentious. Critics claim that the theory is either fundamentally mistaken or boils down to a fancy re-description of things we ...
Boudry, Maarten, Hofhuis, Steije
core   +1 more source

Antagonistic pleiotropy and the evolution of extraordinary lifespans in eusocial organisms

open access: yesEvolution Letters, 2021
Queens of eusocial species live extraordinarily long compared to their workers. So far, it has been argued that these lifespan divergences are readily explained by the classical evolutionary theory of ageing. As workers predominantly perform risky tasks,
Jan J. Kreider, Ido Pen, Boris H. Kramer
doaj   +1 more source

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