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Digital Surficial Geologic Map and Geographic Database of the Northern Tucson Basin and Tucson Mountains, Pima County, Arizona
This digital product contains detailed information about the surficial geology of the Northern Tucson Basin and the Tucson Mountains. The information comprises a GIS database and a visualization of the data as a default map layout. The map layout is included in an ArcView v3.2 project (.apr) file. This product is intended for use on a Windows 95, Windows NT, or higher platform, and an overview of the files distributed with this product is given in the file tree below. Arcview, or another GIS program capable of opening ESRI shapefiles and coverages, is required to use this product. The installation files for a simple ESRI viewing program, ArcExplorer, have been included with this product if the necessary GIS software is not available. The ArcExplorer program, however, does not take full advantage of the information available in this product.Documents in the AZGS Document Repository collection are made available by the Arizona Geological Survey (AZGS) and the University Libraries at the University of Arizona. For more information about items in this collection, please contact [email protected]
A comparison of the effects of porcine somatotropin, genetic selection and sex on performance, carcase and meat quality traits of pigs fed ad libitum
A comparison was made of the effect of recombinant porcine somatotropin (PST) and genetic selection on performance, carcase and meat quality traits of entire male and female pigs grown from 50 kg to 90 kg liveweight and fed ad libitum. Pigs of each sex were drawn from a selected and an unselected control line of common genetic origin and subjected to daily intramuscular injections of either 90 g PST or saline per kg body weight. The selected line had undergone a period of selection for low backfat (P2) depth and high growth rate. The effects of PST and selection were additive for all traits. For performance traits, growth rate was increased 17% by PST and 22% by selection, food conversion ratio was reduced 20% by PST and 14% by selection. For carcase traits P2 fat depth was reduced 15% by PST and 14% by selection. Both PST and selection caused a 1.3% reduction in killing out. For chemical composition of soft tissue, fat was reduced 9.1% by PST and 2.4% by selection, water was increased 6.9% by PST and 2.2% by selection, and protein was increased 2.1% by PST. For lean quality traits, PST had the slightly adverse effect of increasing paleness, cooking loss and firmness of certain muscles, particularly in males, but selection had no adverse effect. The changes brought about by PST could be accounted for by the repartitioning of metabolisable energy away from fat and toward protein whereas both repartitioning and increased appetite accounted for the effects of selection
A comparison of the effects of porcine somatotropin, genetic selection and sex on performance, carcase and meat quality traits of pigs fed ad libitum
A comparison was made of the effect of recombinant porcine somatotropin (PST) and genetic selection on performance, carcase and meat quality traits of entire male and female pigs grown from 50 kg to 90 kg liveweight and fed ad libitum. Pigs of each sex were drawn from a selected and an unselected control line of common genetic origin and subjected to daily intramuscular injections of either 90 g PST or saline per kg body weight. The selected line had undergone a period of selection for low backfat (P2) depth and high growth rate. The effects of PST and selection were additive for all traits. For performance traits, growth rate was increased 17% by PST and 22% by selection, food conversion ratio was reduced 20% by PST and 14% by selection. For carcase traits P2 fat depth was reduced 15% by PST and 14% by selection. Both PST and selection caused a 1.3% reduction in killing out. For chemical composition of soft tissue, fat was reduced 9.1% by PST and 2.4% by selection, water was increased 6.9% by PST and 2.2% by selection, and protein was increased 2.1% by PST. For lean quality traits, PST had the slightly adverse effect of increasing paleness, cooking loss and firmness of certain muscles, particularly in males, but selection had no adverse effect. The changes brought about by PST could be accounted for by the repartitioning of metabolisable energy away from fat and toward protein whereas both repartitioning and increased appetite accounted for the effects of selection
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