Zobrazeno 1 - 10
of 37
pro vyhledávání: '"John H. Gee"'
Autor:
John H. Gee, Sylvie L. Rondeau
Publikováno v:
Herpetologica. 68:3-13
We measured gaseous lift and specific gravity of larval anurans at regular intervals during development to assess their importance in determining buoyancy in eight species. Specifically, we examined the hatchling, larval, and metamorphic stages of ta
Autor:
John H. Gee, Sylvie L. Rondeau
Publikováno v:
Copeia. 2005:188-195
The effects of substrate ingestion on gas-free specific gravity, gaseous lift factor (lung volume), and ultimately buoyancy index are described for larval anurans. Observations on each of Litoria genimaculata and Litoria lesueuri show larvae ingest s
Autor:
Heidi M. Holst, John H. Gee
Publikováno v:
Canadian Journal of Zoology. 70:1590-1594
The sticklebacks Culaea inconstans and Pungitius pungitius maintain buoyancy equilibrium in laboratory experiments by altering swim-bladder volume when held in a range of salinities (0–22.5 ppt). By holding C. inconstans in a Percoll solution in wh
Autor:
John H. Gee, Ruth C. Waldick
Publikováno v:
Copeia. 1995:861
Autor:
John H. Gee, Gordon Berezay
Publikováno v:
Journal of the Fisheries Research Board of Canada. 35:295-299
Creek chub (Semotilus atromaculatus) reduce buoyancy by decreasing swim-bladder volume when exposed to water current. Fish were near neutral buoyancy (0.956–0.997 mL∙g−1) in still water but in current small fish (−1) than larger fish (0.540 m
Autor:
John H. Gee, Arlene M. Tompkins
Publikováno v:
Canadian Journal of Zoology. 61:2482-2490
Brook stickleback, Culaea inconstans, (Kirtland) occurred in vegetated stream margins. In this environment they fed primarily between 1200 and 2000, consuming the greatest amount of food from May to August. They ate crustaceans, annelids, arachnids,
Autor:
Raymond A. Ratynski, John H. Gee
Publikováno v:
Physiological Zoology. 61:301-311
This study shows that differences exist among three species on exposure to hypoxia in their pattern of change in swim-bladder lift, in mechanisms used to regulate such lift, and ultimately in their buoyancy-related adaptations to hypoxia. Fathead min
Autor:
D.Bruce Stewart, John H. Gee
Publikováno v:
Comparative Biochemistry and Physiology Part A: Physiology. 68:337-347
1. 1. Fathead minnows (Pimephales promelas) increase buoyancy when water velocity declines by simultaneously gulping air at the surface and passing it into the swimbladder and by secreting O2 and CO2. When water velocity increases resorption of gases
Autor:
John H. Gee
Publikováno v:
Comparative Biochemistry and Physiology Part A: Physiology. 56:503-508
1. 1. Fathead minnows (Pimephales promelas) alter buoyancy by changing swimbladder volume to compensate for changes in water velocity with the lowest buoyancy attained in faster water velocities. 2. 2. Extent of buoyancy adjustment is greater and rat
Autor:
John H. Gee, Kazimierz Machniak
Publikováno v:
Journal of the Fisheries Research Board of Canada. 32:303-307
Tadopole madtom (Noturus gyrinus) and black bullhead (Ictalurus melas) adjusted buoyancy by altering swimbladder volume becoming less buoyant in current than in still. Extent of adjustment was dependent on size. Tadpole madtom adjusted buoyancy withi