1. The standard rate of oxygen consumption, ventilatory frequency and heart rate of adult Lampetra fluviatilis were measured during the light phase of the photoperiod and at times corresponding to various stages in the upstream migration. 2. All three parameters increased during the spawning run but only in mature individuals were significant differences found between the sexes. 3. The regression coefficients for the logarithmic relationship between oxygen consumption and body weight of immature animals were 0.912 and 0.925 at 9.5 and 16 degrees C respectively. 4. Both the standard rate of oxygen consumption and the amount of oxygen taken up during activity increased greatly during the hours of darkness. 5. Oxygen consumption, ventilatory frequency and, to a lesser extent, heart rate increased significantly at 9.5 degrees C over the 100–20% range of saturation with air. 6. Below 20% saturation with air, lampreys no longer remained attached by their oral disc for prolonged periods and the ventilatory frequency rose even more rapidly to reach a maximum of 175 beats/min at 12.5%. Exposure to 7.5% resulted in death within 5–8 h.
Applications open for Workshop on vertebrate gut physiology
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Applications are now open for Inside Out: New Frontiers in the Comparative Physiology of the Vertebrate Gut, a Workshop organised by Carol Bucking and Chris M. Wood that will examine the function of the vertebrate gastro-intestinal tract. Funded places are available for early-career researchers.
JEB will be at the SICB annual meeting
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JEB is proud to sponsor the Society for Integrative and Comparative Biology annual meeting from 3-7 January in Austin. Visit The Company of Biologists’ booth (#507) throughout the meeting to pick up JEB goodies, and attend the Meet the Editors session (with Craig Franklin, Sheila Patek, Monica Daley, Charlotte Rutledge and Jarren Kay) on 4 January to find out more about the journal and pick up our limited-edition centenary T-shirt.
In the field: an interview with Marie Dacke
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Professor Marie Dacke talks about her earliest experiences of working with dung beetles in South Africa, establishing a new field site in Sardinia, Italy, and the pivotal experiments that confirmed that dung beetles can navigate by star light.
Waterproofing prevents antlion jaws from getting clogged
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Self-cleaning waterproof coating prevents ambushing antlion mouthparts from getting clogged with sand.
Finding the right thermal limit
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In this Review, Michael Ørsted, Lisa Bjerregaard Jørgensen and Johannes Overgaard present a framework to reconcile methodological measurements and mechanisms related to the physiology of heat stress tolerance limits, thermal injury and repair in ectotherms.
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