Mastodawn

The #dockbug #Coreus #marginatus (#Coreidae) is distributed from Europe to Asia. In #CentralEurope, it undergoes one generation per year, with the adults spending their #winter #diapause in hidden places. From October onwards, it can be found e.g. on the underside of #deadwood, as seen here in #Berlin's park Rehberge. T. O. Markova et al. (2020) did studies on the ecology of the #FarEast #subspecies C. m. orientalis.

©#StefanFWirth Bln 2025

Ref
https://doi.org/10.1134/S0013873820050048

Photos
© S.F. Wirth

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Albert Cardona Oct 2, 2024

@flypapers

The potential for lab fly husbandry are high:

"By late August, most adults are in diapause and reproduction ceases. Like many species of Drosophila in temperate regions, there may be only one generation produced per year. This is likely facilitated by the ability to diapause."

Imagine enabling a Drosophila melanogaster to "diapause" in the freezer instead of having to actively maintain their populations by flipping their bottles into new food every two weeks.

The savings by the Bloomington Drosophila Stock Center alone would be huge.

#Drosophila #diapause #flyhusbandry

Matt Willemsen Jun 2, 2024

These Tiny Fish 'Unlocked' Ancient Genes to Survive Months-Long Droughts
https://www.sciencealert.com/these-tiny-fish-unlocked-ancient-genes-to-survive-months-long-droughts #biology #evolution #killifish #diapause #ancient #paralogs

These Tiny Fish 'Unlocked' Ancient Genes to Survive Months-Long Droughts

Living in a semi-arid region, the African turquoise killifish has developed a handy biological hack to survive months-long droughts that parch its muddy ponds each year.

ScienceAlert

American Naturaliﬆ May 1, 2024

How do insects count time in the cold? Toxopeus et al. showed that the duration of diapause (winter dormancy) can be modelled in the apple maggot fly using principles of physiological time, assuming that diapause development rate is temperature sensitive.
https://www.journals.uchicago.edu/doi/10.1086/729515

#insects #cold #diapause #time #appleMaggotFly

NIOO-KNAW Mar 28, 2024

New NIOO publication: Temperature has an overriding role compared to photoperiod in regulating the seasonal timing of winter moth egg hatching. #climatechange #phenology #phenologicalmismatch #insectdormancy #diapause #wintermoth
https://doi.org/10.1007/s00442-024-05535-w

Temperature has an overriding role compared to photoperiod in regulating the seasonal timing of winter moth egg hatching - Oecologia

To accurately predict species’ phenology under climate change, we need to gain a detailed mechanistic understanding of how different environmental cues interact to produce the seasonal timing response. In the winter moth (Operophtera brumata), seasonal timing of egg hatching is strongly affected by ambient temperature and has been under strong climate change-induced selection over the past 25 years. However, it is unclear whether photoperiod received at the egg stage also influences timing of egg hatching. Here, we investigated the relative contribution of photoperiod and temperature in regulating winter moth egg development using two split-brood experiments. We experimentally shifted the photoperiod eggs received by 2–4 weeks compared to the actual calendar date and measured the timing of egg hatching, both at a constant temperature and in combination with two naturally changing temperature treatments – mimicking a cold and a warm year. We found an eight-fold larger effect of temperature compared to photoperiod on egg development time. Moreover, the very small photoperiod effects we found were outweighed by both between- and within-clutch variation in egg development time. Thus, we conclude that photoperiod received at the egg stage does likely not play a substantial role in regulating the seasonal timing of egg hatching in the winter moth. These insights into the regulatory mechanism of seasonal timing could have important implications for predicting insect climate change adaptation, as we might expect different targets of selection depending on the relative contribution of different environmental cues.

SpringerLink

SICB journals(ICB & IOB)Jan 29, 2024

IOB

"Here, we asked if the diet composition queens received prior to diapause affected #diapause survival and post-diapause #reproductive performance using the bumble #bee B. impatiens."

by Treanore et al

https://doi.org/10.1093/iob/obad014

#science #macronutrients #biology

Image from
https://beespotter.org/topics/bio/Bombus/impatiens/index.html

Andy Gardner Sep 13, 2023

New paper: "Kin selection of time travel: the social evolutionary causes & consequences of dormancy" (#OpenAccess), with
Kalyani Twyman.

https://doi.org/10.1098/rspb.2023.1247

#TimeTravel #Dormancy #Diapause #Image https://hotpot.ai/art-generator?s=site-menu #OA

SICB journals(ICB & IOB)Jun 25, 2023

IOB

Post-Diapause #DNA #Replication during #Oogenesis in a Capital-Breeding #Copepod

Monell, Roncalli, Hopcroft, Hartline, & Lenz

https://doi.org/10.1093/iob/obad020

"#Diapause is characterized by very low metabolism, resistance to #environmental stress, & developmental arrest..."

#science #stem #womeninstem

Post-Diapause DNA Replication during Oogenesis in a Capital-Breeding Copepod

Synopsis. In high-latitude environments where seasonal changes include periods of harsh conditions, many arthropods enter diapause, a period of dormancy that is

OUP Academic

Biology Open Feb 9, 2023

In this article, Sophie Kraunsoe et al. explore the role of STAT3 and TFCP2L1 in #epiblast renewal, and find that requirements for stem cell #renewal in the dish are different to those in the #embryo:

https://journals.biologists.com/bio/article/12/1/bio059650/286608/Requirement-for-STAT3-and-its-target-TFCP2L1-in

Check out this interview with Sophie to find out more about the story behind the paper:
https://journals.biologists.com/bio/article/12/1/bio059812/286607/First-person-Sophie-Kraunsoe

#Pluripotency #Diapause #Blastocyst #StemCells #Science #BiologyOpen #Biology #Development #DevBio

Requirement for STAT3 and its target, TFCP2L1, in self-renewal of naïve pluripotent stem cells in vivo and in vitro

Summary: Inducing diapause in mouse embryos demonstrates that STAT3 and TFCP2L1 are essential for self-renewal of the epiblast, but only TFCP2L1 is also required for derivation of embryonic stem cells.

The Company of Biologists