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β1- and β2-adrenergic receptor mediated spontaneous contractions and ryanodine receptor channel opening in human failing heartNARA Subscribed
In heart failure, β-adrenergic receptor (β-AR)-Gsα-cAMP-protein kinase A (PKA) signalling predisposes to delayed-afterdepolarisation-mediated arrhythmias. Phosphodiesterases (PDEs) hydrolyse cAMP, and PDE3 restrains β 1 -AR, β 2 -AR-mediated inotropic responses in failing hearts from β-blocker-treated patients. Whether these receptors provoke arrhythmias through ryanodine receptor (RyR2) dysregulation, and how PDE activity and...
Precision measurement of the Ds*+-Ds+ meson mass differenceNARA Subscribed
Plan Bee: genetic diversity in an Australia honey bee (Apis mellifera) breeding programNARA Subscribed
Our reliance on honey bees for pollination has lead to greater uptake of modern animal breeding methods around the world to improve bee health and productivity. As breeding can result in loss of genetic diversity, it is worth considering the standing genetic diversity in breeding populations from the outset. A bee breeding program (Plan Bee) commenced in Australia in 2020. This study sought to quantify the genetic diversity of...
Micro‐Refuges or Ecological Traps: Context‐Dependent Effects of Rock Pools on Intertidal Biodiversity Across LatitudesNARA Subscribed
Aim We investigated how local‐scale environmental heterogeneity influences biodiversity patterns across broad biogeographic gradients, using intertidal microhabitats as a model system within one of the most environmentally stressful ecosystems on Earth. Location Intertidal habitats at 26 locations (two rocky shore sites per location) across six continents, spanning 98° of latitude (38°S to 60°N). Time Period 2019–2022. Major T...
Migratory Birds Advance Spring Arrival and Egg‐Laying in the Arctic, Mostly by Travelling FasterNARA Subscribed
In the current warming climate, many organisms in seasonal environments advance their timing of reproduction to benefit from resource peaks earlier in spring. For migrants, the potential to advance reproduction may be constrained by their migration strategies, notably their ability to advance arrival at the breeding grounds. Recent studies show various changes in migration strategies, including wintering closer to the breeding...
The malacosporean Tetracapsuloides bryosalmonae was detected in kidneys from Atlantic salmon parr in 64 of 91 sampled Norwegian rivers. Using real‐time PCR , this parasite was found to be present in Atlantic salmon parr in rivers along the whole coast, from the northernmost and southernmost areas of the country. In addition, T. bryosalmonae was found in kidneys from brown trout parr in 17 of 19 sampled rivers in south‐east Nor...
Atlantic salmon infected with salmon lice are more susceptible to new lice infectionsNARA Subscribed
Aggregation is commonly observed for macroparasites, but its adaptive value remains unclear. Heavy infestations intensities may lead to a decrease in some fitness‐related traits of parasites (e.g. parasite fecundity or survival). However, to a dioecious parasite, increased aggregation could also increase the chance of finding individuals of the opposite sex. In a laboratory experiment, we tested if previous experience with sal...
Morphological diversity of Paramoeba perurans trophozoites and their interaction with Atlantic salmon, Salmo salar L., gillsNARA Subscribed
Amoebic gill disease ( AGD ) caused by the ectoparasite Paramoeba perurans affects several cultured marine fish species worldwide. In this study, the morphology and ultrastructure of P. perurans in vitro and in vivo was investigated using scanning and transmission electron microscopy ( SEM and TEM , respectively). Amoebae cultures contained several different morphologies ranging from a distinct rounded cell structure and polym...
One hundred farmed A tlantic salmon, S almo salar L ., were examined for the presence of nematodes by digestion of tissue in HC l–pepsin solution. All fish were sampled from one cage in a fish farm on the Norwegian south‐west coast. Fifty harvest quality salmon, that is, salmon for human consumption (mean 5.4 kg, variation 3.0–7.6 kg), were sampled at the processing line while 50 salmon runts (mean 1.1 kg, variation 0.4–1.8 kg...
To study the migratory behaviour in wild northern European silver eel Anguilla anguilla during sea entry and early marine migration, 32 individuals were tagged with acoustic transmitters and registered at four automatic listening station arrays from the mouth of the north Norwegian River Alta and throughout the Alta Fjord. The A. anguilla entered the fjord during all parts of the tidal cycle and did not seem to utilize the out...
Occurrence of postmortem myoliquefactive kudoosis in Atlantic mackerel, Scomber scombrus L., from the North SeaNARA Subscribed
Members of the myxosporean genus Kudoa occur in various marine teleosts worldwide. Several species are of concern to the fishery and aquaculture industries as they may produce unsightly cysts in the fish host’s musculature or are associated with postmortem myoliquefaction of the fish muscle, commonly referred to as ‘soft flesh’. This study describes the occurrence and effects on a host of a Kudoa species in Atlantic mackerel,...
Systemic infection with Uronema ‐like ciliates in farmed turbot, Scophthalmus maximus (L.)NARA Subscribed
Histophagous ciliates caused high mortality among turbot in a commercial fish farm in southern Norway. The ciliates spread systemically in fry ( Uronema (Scuticociliatida).
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