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Articles 541 - 570 of 694
Full-Text Articles in Physiology
End Matter, Vol. 12 No. 1
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 12 No. 1
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
End Matter, Vol. 11 No. 4
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Mites And Lice Of The National Reactor Testing Station, Dorald M. Allred
Mites And Lice Of The National Reactor Testing Station, Dorald M. Allred
Brigham Young University Science Bulletin, Biological Series
Mites of 47 species and lice of 16 species were taken from reptiles of 3 species, birds of 23 species, and mammals of 18 species at the National Reactor Testing Station between June, 1966, and September, 1967. Mammals differed in degree of infestation relative to their geographic distribution at the station. The number of species of ectoparasites which occurred on a particular kind of host generally was in direct proportion to the number of hosts examined, but exceptions occurred in some instances. In some cases the rate of infestation differed relative to the sex of the host. The greatest numbers …
End Matter, Vol. 11 No. 3
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Distribution Of The Native Trees Of Utah, Kimball S. Erdman
Distribution Of The Native Trees Of Utah, Kimball S. Erdman
Brigham Young University Science Bulletin, Biological Series
Although botanists have been actively collecting in Utah for well over a century, the distribution of many plants are as yet imperfectly known. This is, in part, due to the scattered nature of Utah herbarium material. Also the terrain of the state has impeded collection in more rugged and remote areas. The present study gathers together the data from the major collections of native Utah trees and clarifies our present understanding of tree distributions in the state. The older collection records have been extensively supplemented by the field work of the author and other botanists.
The great diversity of environments …
Front Matter, Vol. 11 No. 3
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Osteological And Mylogical Comparisons Of The Head And Thorax Regions Of Cnemidophorus Tigris Septentrionalis Burger And Ameiva Undulata Parva Barbour And Nobel (Family Teiidae), Don Lowell Fisher, Wilmer W. Tanner
Osteological And Mylogical Comparisons Of The Head And Thorax Regions Of Cnemidophorus Tigris Septentrionalis Burger And Ameiva Undulata Parva Barbour And Nobel (Family Teiidae), Don Lowell Fisher, Wilmer W. Tanner
Brigham Young University Science Bulletin, Biological Series
The anterior osteological elements of the skull, lower jaw, and wrist along with the anterior myological characters discussed and figured in this report suggest that A. u. parva and C. t. septentrionalis are members of distinct groups which can be differentiated by internal morphologic characters. Although comparisons were restricted to highly geographically separated individuals of the same family, their general body form and structure appear to be similar.
A great number of anatomical structures are shared in common, but the significant differences between them include:
1. General skull appearance. The skull of C. is generally lighter, that is the bones …
Pinyon-Juniper Succession After Natural Fires On Residual Soils Of Mesa Verde, Colorado, James A. Erdman
Pinyon-Juniper Succession After Natural Fires On Residual Soils Of Mesa Verde, Colorado, James A. Erdman
Brigham Young University Science Bulletin, Biological Series
A mountain brush vegetation typified by Gambel oak (Quercus gambelii) and serviceberry (Amelanchier utahensis) dominates the uplands of Mesa Verde National Park. There is evidence that this brush element is a successional stage that has been maintained by repeated natural fires in a large part of the Mesa Verde landscape. This study was conducted to determine the role of fire in the region's ecology, the nature of the climax pinyon pine (Pinus edulis) and Utah juniper (Juniperus osteosperma) vegetation, and the major successional stages that lead to the climax condition.
Three postburn …
End Matter, Vol. 11 No. 2
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 11 No. 2
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
End Matter, Vol. 11 No. 1
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 11 No. 1
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Mating Weaners Does Not Affect Future Ewe Performance, R J. Suiter, K. P. Croker
Mating Weaners Does Not Affect Future Ewe Performance, R J. Suiter, K. P. Croker
Journal of the Department of Agriculture, Western Australia, Series 4
Maiden ewes in Western Australia are usually mated in their second year because of supposed ill-effects of earlier mating on the ewe's future production. Mating at a younger age however, providing there was no reduction in future performance, would provide for an extra lamb drop and thus increase the lifetime output of ewes.
Information from various sources indicated that weaners could be successfully mated providing their bodyweights were satisfactory. This trial was carried out to test the results of mating weaners under Western Australian conditions.
Phosphate Applications Affect The Coumestrol Level Of Medics, T Marshall, R. J. Parkin
Phosphate Applications Affect The Coumestrol Level Of Medics, T Marshall, R. J. Parkin
Journal of the Department of Agriculture, Western Australia, Series 4
Western Australia has a million acres of medics including various cultivars of barrel medic, Medicago truncatula, and strand medic, M. littoralis. Both species contain coumestrol, a chemical thought to have caused delayed conception and reduced twinning rates among grazing ewes in New Zealand.
No infertility has been reported among ewes grazing medic pastures in Western Australia, but coumestrol levels in both species have often been high enough to suggest the possibility of oestrogenic responses among sheep grazing them.
Maintaining Ewe Bodyweight For A Late Mating, T Marshall
Maintaining Ewe Bodyweight For A Late Mating, T Marshall
Journal of the Department of Agriculture, Western Australia, Series 4
DEPARTMENT OF AGRICULTURE experiments have indicated that the bodyweight of ewes at mating can have a large bearing on lambing performance.
It appears that for every 10 lb. increase in pre-mating bodyweight, an increase of some 3 to 6 per cent, lambs born could be expected, depending on the lambing time.
The Feed Year Approach To Dairying, P T. Arkell
The Feed Year Approach To Dairying, P T. Arkell
Journal of the Department of Agriculture, Western Australia, Series 4
Dairy cows have different food requirements at different times of the year.
Cows in peak production require much more food per day than dry cows. It is a waste of money to feed a dry cow more than it actually needs for maintenance.
Equally, it is uneconomic NOT to feed a producing cow enough to give maximum production.
Superphosphate Deficiency Raises Pasture Oestrogens, H G. Neil, T. Marshall
Superphosphate Deficiency Raises Pasture Oestrogens, H G. Neil, T. Marshall
Journal of the Department of Agriculture, Western Australia, Series 4
A recent field experiment on established pastures at Esperance Downs Research Station has demonstrated a relationship between superphosphate application, pasture oestrogens and oestrogenic response in sheep.
Results of the experiment indicate that on phosphate deficient soils carrying oestrogenic clovers, the levels of oestrogenic materials in the pasture are increased if superphosphate applications are below those recommended for healthy pasture growth.
Front Matter, Vol. 10 No. 4
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
End Matter, Vol. 10 No. 4
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Nesting Ecology Of Raptorial Birds In Central Utah, Joseph R. Murphy, Franz J. Camenzind, Dwight G. Smith, J. Bradford Weston
Nesting Ecology Of Raptorial Birds In Central Utah, Joseph R. Murphy, Franz J. Camenzind, Dwight G. Smith, J. Bradford Weston
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
New Records And Species Of Neotropical Bark Beetles (Scolytidae: Coleoptera), Stephen L. Wood
New Records And Species Of Neotropical Bark Beetles (Scolytidae: Coleoptera), Stephen L. Wood
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 10 No. 3
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
End Matter, Vol. 10 No. 3
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
End Matter, Vol. 10 No. 2
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 10 No. 2
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
A Study Of The Weevil Tribe Celeuthetini Of The Solomon Islands (Coleoptera: Curculionidae), Vasco M. Tanner
A Study Of The Weevil Tribe Celeuthetini Of The Solomon Islands (Coleoptera: Curculionidae), Vasco M. Tanner
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Control Of Clover Infertility In Sheep, H G. Neil, H. E. Fels, C. M. Francis
Control Of Clover Infertility In Sheep, H G. Neil, H. E. Fels, C. M. Francis
Journal of the Department of Agriculture, Western Australia, Series 4
A summary of practices recommended for the control of infertility caused by subterranean clover in West Australian sheep.
PROLONGED grazing of green subterranean clover pastures often reduces ewe fertility. In more extreme cases, obvious signs of clover disease occur.
Birth Weights Of Calves : Report Of A Calf Weighing Project At Wokalup Research Station, Maurice C. Cullity
Birth Weights Of Calves : Report Of A Calf Weighing Project At Wokalup Research Station, Maurice C. Cullity
Journal of the Department of Agriculture, Western Australia, Series 4
SINCE 1957, all calves born on Wokalup Research Station have been weighed as close to b i r th as possible and detailed birth weight records have been kept for all phases of the Station's breeding activities.
End Matter, Vol. 9 No. 4
Brigham Young University Science Bulletin, Biological Series
No abstract provided.