0000000001178788
AUTHOR
Chedly Kastally
showing 5 related works from this author
sj-pdf-1-jbr-10.1177_0748730421997265 – Supplemental material for Nanda-Hamner Curves Show Huge Latitudinal Variation but No Circadian Components in …
2021
Supplemental material, sj-pdf-1-jbr-10.1177_0748730421997265 for Nanda-Hamner Curves Show Huge Latitudinal Variation but No Circadian Components in Drosophila Montana Photoperiodism by Pekka Lankinen, Chedly Kastally and Anneli Hoikkala in Journal of Biological Rhythms
Genetic evidence confirms polygamous mating system in a crustacean parasite with multiple hosts.
2014
Mating systems are diverse in animals, notably in crustaceans, but can be inferred from a limited set of parameters. Baeza and Thiel (2007) proposed a model predicting mating systems of symbiotic crustaceans with three host characteristics and the risk of predation. These authors proposed five mating systems, ranging from monogamy to polygynandry (where multiple mating occurs for both genders). Using microsatellite loci, we tested the putatively mating system of the ectoparasite crab Dissodactylus primitivus. We determined the mating frequencies of males and females, parentage assignment (COLONY & GERUD software) as well as the contents of female spermathecae. Our results are globally consi…
Nanda-Hamner Curves Show Huge Latitudinal Variation but No Circadian Components in Drosophila Montana Photoperiodism
2021
Insect species with a wide distribution offer a great opportunity to trace latitudinal variation in the photoperiodic regulation of traits important in reproduction and stress tolerances. We measured this variation in the photoperiodic time-measuring system underlying reproductive diapause in Drosophila montana, using a Nanda-Hamner (NH) protocol. None of the study strains showed diel rhythmicity in female diapause proportions under a constant day length (12 h) and varying night lengths in photoperiods ranging from 16 to 84 h at 16°C. In the northernmost strains (above 55°N), nearly all females entered diapause under all photoperiods and about half of them even in continuous darkness, whil…
sj-pdf-1-jbr-10.1177_0748730421997265 – Supplemental material for Nanda-Hamner Curves Show Huge Latitudinal Variation but No Circadian Components in …
2021
Supplemental material, sj-pdf-1-jbr-10.1177_0748730421997265 for Nanda-Hamner Curves Show Huge Latitudinal Variation but No Circadian Components in Drosophila Montana Photoperiodism by Pekka Lankinen, Chedly Kastally and Anneli Hoikkala in Journal of Biological Rhythms
Plasticity in Photoperiodism : Drosophila montana Females Have a Life-Long Ability to Switch From Reproduction to Diapause
2022
Photoperiodic reproductive diapause is an essential part of female life cycle in several insect species living on high latitudes, where overwintering in reproductive stage involves high risks for survival and progeny production. The sensitive period (SP), during which photoperiodic cues can trigger the switch from direct development to diapause, can last from a few hours or days after emergence to the entire life span of females. Moreover, in some species, sexually mature females can enter post-reproductive diapause as a response to decreasing day length and/or temperature. We studied the duration of SP for diapause induction and the females’ ability to enter post-reproductive diapause at s…