Issues
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Cover image
Cover Image
Cover: During their migrations, many fishes including Arctic char (Salvelinus alpinus) often encounter rapid increases in temperature that can impair their heart function. Gilbert et al. (jeb244055) used a mobile Arctic laboratory to determine whether wild migrating Arctic char could rapidly acclimate to warm temperatures and partially mitigate such impairments. Following just 3 days of warm acclimation, Arctic char reset their heart rate to help counteract the effects of warming and improved the heat tolerance of their hearts. Such rapid plasticity may help migratory fish partially mitigate the negative impacts of high temperatures. Photo credit: Matthew J. H. Gilbert.
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SHORT COMMUNICATIONS
Rapid cardiac thermal acclimation in wild anadromous Arctic char (Salvelinus alpinus)
Summary: Wild migrating Arctic char can rapidly adjust the temperature sensitivity of their hearts; this rapid cardiac thermal plasticity may help migratory fishes like Arctic char mitigate short-term thermal challenges.
Sea turtle hatchlings can distinguish between coastal and oceanic seawaters
Summary: Post-emergent sea turtles may have the ability to distinguish between seawater types originating from within and beyond the continental shelf. This ability could have a goal-recognition function.
RESEARCH ARTICLES
Orientation in the European common frog Rana temporaria during the first wintering migration
Summary: During the first wintering migration, common frogs apparently have no innate direction, but they possess a behavioral program where local orientation cues dominate at first and global cues at later stages of migration.
The flavonoid rutin protects the bumble bee Bombus impatiens against cognitive impairment by imidacloprid and fipronil
Highlighted Article: Prophylactically feeding bumble bees with rutin protects their learning and memory performance against oral exposure to insecticides with different mechanisms of action.
Seasonal adjustments in body mass and basal thermogenesis in Chinese hwameis (Garrulax canorus): the roles of temperature and photoperiod
Summary: Ambient temperature, rather than photoperiod, is the primary driving force of basal thermogenesis in Chinese hwameis; an increase in basal thermogenesis is associated with an increase in cellular metabolic capacity.
The role of neuropeptides in regulating ecdysis and reproduction in the hemimetabolous insect Rhodnius prolixus
Summary: Neuroendocrine regulation of ecdysis in Holometabola is conserved in the hemimetabolous insect Rhodnius prolixus but these neuropeptides have no role in ovary maturation, indicating differences in the regulation of reproduction in Hemimetabola.
Development of dim-light vision in the nocturnal reef fish family Holocentridae. I: Retinal gene expression
Summary: Coral reef fishes in the family Holocentridae remodel their retina at the molecular level to adapt to a nocturnal lifestyle during development.
Development of dim-light vision in the nocturnal reef fish family Holocentridae. II: Retinal morphology
Summary: Coral reef fishes in the family Holocentridae remodel their retina at the cellular level to adapt to a nocturnal lifestyle during development.
Protein storage and reproduction increase in grasshoppers on a diet matched to the amino acids of egg yolk protein
Summary: Grasshoppers fed diets that match the amino acids in their eggs reproduce more, and also store more protein.
Head removal enhances planarian electrotaxis
Summary: A new method for quantitative studies of planarian electrotaxis shows that Dugesia japonica move toward the cathode. This behavior is enhanced by removal of the head.
Intraspecific investigation of dehydration-enhanced innate immune performance and endocrine stress response to sublethal dehydration in a semi-aquatic species of pit viper
Highlighted Article: Intraspecific investigation of the effects of sublethal dehydration on innate immune performance and corticosterone in a pit viper shows dehydration-enhanced innate immune performance is conserved and baseline corticosterone is correlated with plasma osmolality.
Early exposure to UV radiation causes telomere shortening and poorer condition later in life
Summary: Ultraviolet radiation exposure in amphibian larvae generates detrimental carryover effects on body condition and relative telomere length post-metamorphosis, a mechanism that may influence amphibian population dynamics.
Defensive shimmering responses in Apis dorsata are triggered by dark stimuli moving against a bright background
Summary: The shimmering response in Asian giant honey bees is elicited only when a dark object above a threshold size moves against a bright background in sufficient ambient light conditions, with no evidence of habituation of this response.
Spatial uniformity of action potentials indicates base-to-apex depolarization and repolarization of rainbow trout (Oncorhynchus mykiss) ventricle
Summary: Spatial uniformity of action potential durations and base-to-apex propagation of activation with a relatively slow velocity of propagation indicates no special ventricular conduction pathway in the trout ventricle.
Sensory perception in a changing world – join us in Liverpool in March 2025
We are excited to invite you to a unique scientific conference, celebrating the 100-year anniversary of The Company of Biologists, and bringing together our different communities. The conference will incorporate the JEB Symposium Sensory Perception in a Changing World and the SEB satellite meeting. Find out more and register to join us in March 2025 in Liverpool, UK. Submit your abstract by 17 January 2025. Early-bird registration ends on 17 January 2025.
Extraordinary creatures: mantis shrimp
In our new Conversation series focusing on extraordinary creatures, Tom Cronin and Sheila Patek tell us about the incredible biology of mantis shrimp, from their complex vision to their powerful striking abilities.
Behaviour as a physiological process
In this Commentary, Shamil Debaere & colleagues argue the case for integration of behaviour into animal physiology, and advocate for behaviour to be considered as a physiological process.
Tiny ring-necked snakes keep warm heads despite their size
Some ectotherms are able to raise the temperature of certain body parts above the temperature of other regions & now Christian Fox and Albert Chung, with undergraduates from the University of Virginia, reveal that the heads of tiny ring-necked snakes can be 2.1C warmer than their tails, even though they are only 20cm long.
