Jantina Toxopeus

Overwintering under the ice: seasonal shifts in cold and hypoxia stress physiology of three winter-active pond insects

This study examines seasonal changes in cold and hypoxia tolerance in three winter-active pond insects, finding improved cold tolerance but no changes in hypoxia tolerance.

Freeze tolerance of a beneficial lady beetle, Hippodamia convergens

This study shows that the lady beetle Hippodamia convergens can tolerate freezing at high subzero temperatures and maintains normal mating behavior after freezing.

The cold tolerance of an adult winter-active stonefly: How Allocapnia pygmaea (Plecoptera: Capniidae) avoids freezing in Nova Scotian winters

This study investigates the cold tolerance of Allocapnia pygmaea, finding it avoids freezing by surviving subzero temperatures and showing limited changes in cryoprotectants except for glycerol and myo-inositol.

Tissue- and temperature-dependent expression, enzyme activity, and RNAi knockdown of Catalase in a freeze-tolerant insect

This study uses RNAi to investigate Catalase's role in freeze tolerance in the spring field cricket, finding temperature-dependent RNAi efficacy and no effect of Catalase knockdown on freeze survival.

Freeze-tolerant crickets fortify their actin cytoskeleton in fat body tissue

Freeze-tolerant crickets modify their actin cytoskeleton in fat body tissue to prevent freeze-induced damage, while freeze-intolerant crickets experience cytoskeleton damage during freezing.

HSP70 is upregulated after heat but not freezing stress in the freeze-tolerant cricket Gryllus veletis

This study examines HSP70 expression in a freeze-tolerant cricket under heat and freezing stress, finding that HSP70 is upregulated by heat but not freezing.

Invasive adult jumping worms in Atlantic Canada are chill-susceptible

This study examines the cold tolerance of invasive jumping worms in Atlantic Canada, finding they are susceptible to mild low temperatures and do not acclimate effectively.