Spatial, but not temporal, aspects of orientation are controlled by the fine scale distribution of chemical cues in turbulent odor plumes [RESEARCH ARTICLE]
In this study, we place electrochemical sensors on the carapace of orienting crayfish and measure, with fast temporal rates and small spatial scales, the concentration fluctuations arriving at the olfactory appendages during orientation. The results of these studies show that the spatial aspects of orientation (turning and heading angles) are controlled by the temporal aspects of odor cues. (Source: Journal of Experimental Biology)
Source: Journal of Experimental Biology - March 9, 2021 Category: Biology Authors: Moore, P. A., Edwards, D., Jurcak-Detter, A., Lahman, S. Tags: RESEARCH ARTICLE Source Type: research
Effects of Na+ channel isoforms and cellular environment on temperature tolerance of cardiac Na+ current in zebrafish (Danio rerio) and rainbow trout (Oncorhynchus mykiss) [RESEARCH ARTICLE]
Jaakko Haverinen, Irina Dzhumaniiazova, Denis V. Abramochkin, Minna Hassinen, and Matti Vornanen Heat tolerance of heart rate in fish is suggested to be limited by impaired electrical excitation of the ventricle due to the antagonistic effects of high temperature on Na+ (INa) and K+ (IK1) ion currents (INa is depressed at high temperatures while IK1 is resistant to them). To examine the role of Na+ channel proteins in heat tolerance of INa, we compared temperature-dependencies of zebrafish (Danio rerio, warm-dwelling subtropical species) and rainbow trout (Oncorhynchus mykiss, cold-active temperate species) ventricular INa...
Source: Journal of Experimental Biology - March 9, 2021 Category: Biology Authors: Haverinen, J., Dzhumaniiazova, I., Abramochkin, D. V., Hassinen, M., Vornanen, M. Tags: RESEARCH ARTICLE Source Type: research
Mitochondrial physiology and responses to elevated hydrogen sulphide in two isogenic lineages of an amphibious mangrove fish [RESEARCH ARTICLE]
Keri E. Martin, Suzanne Currie, and Nicolas Pichaud Hydrogen sulphide (H2S) is toxic and can act as a selective pressure on aquatic organisms facilitating a wide range of adaptations for life in sulphidic environments. Rivulus (Kryptolebias marmoratus) inhabit mangrove swamps and have developed high tolerance to environmental H2S. Rivulus are hermaphroditic and can self-fertilize, producing distinct isogenic lineages with different sensitivity to H2S. Here, we tested the hypothesis that observed differences in responses to H2S are the result of differences in mitochondrial functions. For this purpose, we performed two expe...
Source: Journal of Experimental Biology - March 9, 2021 Category: Biology Authors: Martin, K. E., Currie, S., Pichaud, N. Tags: RESEARCH ARTICLE Source Type: research
Michael Francis Land FRS, 1942-2020 [OBITUARY]
Dan-E. Nilsson (Source: Journal of Experimental Biology)
Source: Journal of Experimental Biology - March 8, 2021 Category: Biology Authors: Nilsson, D.-E. Tags: OBITUARY Source Type: research
Touchy octopuses pull arms back when they feel light [INSIDE JEB]
Kathryn Knight (Source: Journal of Experimental Biology)
Source: Journal of Experimental Biology - March 5, 2021 Category: Biology Authors: Knight, K. Tags: INSIDE JEB Source Type: research
Thirst and drinking in North American watersnakes (Nerodia spp.) [SHORT COMMUNICATION]
Matthew Edwards, Coleman M. Sheehy 3rd, Matthew T. Fedler, and Harvey B. Lillywhite
We quantified drinking behavior in three species of North American watersnakes: Nerodia clarkii, which is a marine or brackish water amphibious species, and Nerodia fasciata and Nerodia taxispilota, both freshwater amphibious species. All three species have relatively small and similar thresholds of dehydration (TH, approximately –4% loss of body mass) that elicit thirst and drinking of fresh water. These species have higher thirst sensitivity than several species of hydrophiine and laticaudine sea snakes, which are characterized by ...
Source: Journal of Experimental Biology - March 5, 2021 Category: Biology Authors: Edwards, M., Sheehy, C. M., Fedler, M. T., Lillywhite, H. B. Tags: SHORT COMMUNICATION Source Type: research
Feel the light: sight-independent negative phototactic response in octopus arms [RESEARCH ARTICLE]
Itamar Katz, Tal Shomrat, and Nir Nesher
Controlling the octopus's flexible hyper-redundant body is a challenging task. It is assumed that the octopus has poor proprioception which has driven the development of unique mechanisms for efficient body control. Here we report on such a mechanism: a phototactic response of extraocular photoreception. Extraocular photoreception has been observed in many and diverse species. Previous research on cephalopods revealed that increased illumination on their skin evokes chromatophore expansion. Recently, the mechanism was investigated and has been termed ‘light-activated chromato...
Source: Journal of Experimental Biology - March 5, 2021 Category: Biology Authors: Katz, I., Shomrat, T., Nesher, N. Tags: RESEARCH ARTICLE Source Type: research
Socialites boosted but loners set back in a crowd [OUTSIDE JEB]
Lauren Nadler (Source: Journal of Experimental Biology)
Source: Journal of Experimental Biology - March 5, 2021 Category: Biology Authors: Nadler, L. Tags: OUTSIDE JEB Source Type: research
Climate change may push zebrafish to the brink [OUTSIDE JEB]
Andrea Murillo (Source: Journal of Experimental Biology)
Source: Journal of Experimental Biology - March 5, 2021 Category: Biology Authors: Murillo, A. Tags: OUTSIDE JEB Source Type: research
Tool-shaped ladybird hairs guarded by protein [OUTSIDE JEB]
Domna-Maria Kaimaki (Source: Journal of Experimental Biology)
Source: Journal of Experimental Biology - March 5, 2021 Category: Biology Authors: Kaimaki, D.-M. Tags: OUTSIDE JEB Source Type: research
Freshwater snails stinky environment could kill their babies [OUTSIDE JEB]
Gina Mantica (Source: Journal of Experimental Biology)
Source: Journal of Experimental Biology - March 5, 2021 Category: Biology Authors: Mantica, G. Tags: OUTSIDE JEB Source Type: research
Buzzing bees grab and go while leisurely hoverflies lunch [OUTSIDE JEB]
Christopher Basu (Source: Journal of Experimental Biology)
Source: Journal of Experimental Biology - March 5, 2021 Category: Biology Authors: Basu, C. Tags: OUTSIDE JEB Source Type: research
Early developmental stages of native populations of Ciona intestinalis under increased temperature are affected by local habitat history [RESEARCH ARTICLE]
Elizabeth A. Clutton, Gaston Alurralde, and Tiago Repolho
Temperature modulates marine ectotherm physiology, influencing survival, abundance and species distribution. While native species could be susceptible to ocean warming, thermal tolerance might favour the spread of non-native species. Determining the success of invasive species in response to climate change is confounded by the cumulative, synergistic or antagonistic effects of environmental drivers, which vary at a geographical and temporal scale. Thus, an organism's acclimation or adaptive potential could play an important evolutionary role by enabling or conditio...
Source: Journal of Experimental Biology - March 5, 2021 Category: Biology Authors: Clutton, E. A., Alurralde, G., Repolho, T. Tags: RESEARCH ARTICLE Source Type: research
Masticatory system integration in a commensal canid: interrelationships between bones, muscles and bite force in the red fox [RESEARCH ARTICLE]
Colline Brassard, Marilaine Merlin, Elodie Monchatre-Leroy, Claude Guintard, Jacques Barrat, Helene Gares, Arnaud Larralle, Raymond Triquet, Celine Houssin, Cecile Callou, Raphaël Cornette, and Anthony Herrel
The jaw system in canids is essential for defence and prey acquisition. However, how it varies in wild species in comparison with domestic species remains poorly understood, yet is of interest in terms of understanding the impact of artificial selection. Here, we explored the variability and interrelationships between the upper and lower jaws, muscle architecture and bite force in the red fox (Vulpes vulpes)....
Source: Journal of Experimental Biology - March 5, 2021 Category: Biology Authors: Brassard, C., Merlin, M., Monchatre-Leroy, E., Guintard, C., Barrat, J., Gares, H., Larralle, A., Triquet, R., Houssin, C., Callou, C., Cornette, R., Herrel, A. Tags: RESEARCH ARTICLE Source Type: research
Nest substrate and tool shape significantly affect the mechanics and energy requirements of avian eggshell puncture [RESEARCH ARTICLE]
Daniel L. Clark, Mark E. Hauber, and Philip S. L. Anderson Some host species of avian obligate brood parasites reject parasitic eggs from their nest whereas others accept them, even though they recognize them as foreign. One hypothesis to explain this seemingly maladaptive behavior is that acceptors are unable to pierce and remove the parasitic eggshell. Previous studies reporting on the force and energy required to break brood parasites’ eggshells were typically static tests performed against hard substrate surfaces. Here, we considered host nest as a substrate to simulate this potentially critical aspect of the nat...
Source: Journal of Experimental Biology - March 5, 2021 Category: Biology Authors: Clark, D. L., Hauber, M. E., Anderson, P. S. L. Tags: RESEARCH ARTICLE Source Type: research
