Search results for "melaniini"
showing 3 items of 3 documents
Responses to ultraviolet radiation in larval pike, Esox lucius, of two origins and ages
2007
Ultraviolet radiation (UVR)-induced mortality and behavioural disorder were studied in larval northern pike of two origins and ages. Newly hatched larvae of two differently coloured populations and six-day-old larvae of one population were exposed to four fluence rates of UVR, resulting in total doses from 11.5 to 63 kJ m–2, and monitored for mortality and behaviour. The rate of mortality and the severity of behavioural disorder differed by origin and age of the animals, but the effect was fluence-rate dependent. Total melanin concentration of newly hatched larvae was measured to assess if sensitivity to UVR correlated with pigmentation, but no differences in melanin concentration between l…
Kadmiumaltistuksen havaitseminen Hydropsyche pellucidula -vesiperhostoukilla (Trichoptera: Hydropsychidae) hyperspektrikuvantamisen ja kidusvaurioide…
2017
Metallipäästöt aiheuttavat vesistöissä eliöyhteisöille monenlaisia haittavaikutuksia, joita voidaan tutkia bioindikaattori- eli ilmentäjälajimenetelmin. Vesiperhostoukkia (Trichoptera) on käytetty virtavesien metallisaastumisen indikaattoreina, sillä ne kestävät metallialtistusta suhteellisen hyvin, mutta altistuksen seurauksena toukilla voi esiintyä morfologisia muutoksia, kuten kidusvaurioita tai pintakudoksen tummumista. Koska toisaalta vierasaineiden kudospitoisuusmittaus on usein työlästä ja toisaalta rakenteellisten muutosten arviointi altis subjektiiviselle harhalle, tavoitteenani oli kehittää objektiivinen ja kustannustehokas tapa selvittää metallialtistusta ja sen vaikutuksia pohja…
Comparative transcriptomics of albino and warningly‐coloured caterpillars
2021
Abstract Coloration is perhaps one of the most prominent adaptations for survival and reproduction of many taxa. Coloration is of particular importance for aposematic species, which rely on their coloring and patterning acting as a warning signal to deter predators. Most research has focused on the evolution of warning coloration by natural selection. However, little information is available for color mutants of aposematic species, particularly at the genomic level. Here, I compare the transcriptomes of albino mutant caterpillars of the aposematic wood tiger moth (Arctia plantaginis) to those of their full sibs having their distinctive orange‐black warning coloration. The results showed >29…