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2012

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Articles 451 - 480 of 948

Full-Text Articles in Animal Sciences

Feather Biomechanics Of Penguins And Other Seabirds, Katherine Elizabeth Johnson Jan 2012

Feather Biomechanics Of Penguins And Other Seabirds, Katherine Elizabeth Johnson

Theses Digitization Project

Although many aspects of penguin biology have been studied, the feathers have received less attention except with regard to thermoregulation. The biomechanics of penguin feathers are the focus of this thesis. By studying penguins in comparison to other wing-propelled aquatic fliers, it may be possible to understand how penguin feathers evolved. Fourteen species were sampled, including aerial flyers, aerial flyers that are also wing propelled divers, as well as flightless wing propelled divers.


Notes On The Diet Of The Malay Civet (Viverra Tangalunga) And Other Civets In Logged And Unlogged Lowland Dipterocarp Rain Forests In Sabah, Borneo, Christina P. Colon, John B. Sugau Jan 2012

Notes On The Diet Of The Malay Civet (Viverra Tangalunga) And Other Civets In Logged And Unlogged Lowland Dipterocarp Rain Forests In Sabah, Borneo, Christina P. Colon, John B. Sugau

Publications and Research

Civet diets were examined in a logged and unlogged Bornean rain forest. Malay civets (Viverra tangalunga) consumed invertebrates, fruit, rodents, insectivores, birds, snakes and lizards, and appear to show preference for centipedes and scorpions. Other civet species consumed fruit, such as figs, Connarus sp. and Annona sp., particularly in the unlogged forest, but also consumed invertebrates and vertebrates. Reduced fruit consumption observed in the logged forest may be due to lower availability and may be offset by increased consumption of invertebrates. The increased overlap in diet between Malay civets and other civets in disturbed areas may lead to …


2012 Dairy Digest, South Dakota State University Dairy Club Jan 2012

2012 Dairy Digest, South Dakota State University Dairy Club

Dairy Digest

No abstract provided.


Revisiting The Ecological Status Of The Cheat Mountain Salamander (Plethodon Nettingi) After 32 Years, Whitney A. Kroschel Jan 2012

Revisiting The Ecological Status Of The Cheat Mountain Salamander (Plethodon Nettingi) After 32 Years, Whitney A. Kroschel

Theses, Dissertations and Capstones

The Cheat Mountain Salamander (Plethodon nettingi) is endemic to the high elevations of the Allegheny Mountains in West Virginia and is listed by the U.S. Fish and Wildlife Service as a threatened species. In 1978-79 and in 2011 the vertical distribution of P. nettingi was measured at four sites to determine their range of occupancy in relation to elevation. During both time periods, a transect was established at each site that ran from high to low elevation. Along each transect, quadrats were placed at regular, 12.2 m elevation intervals. Quadrats were searched twice for presence/absence (i.e., occupancy) and abundance of …


Ua94/6/11 Student / Alumni Personal Papers Wku Darwin Newton, Wku Archives Jan 2012

Ua94/6/11 Student / Alumni Personal Papers Wku Darwin Newton, Wku Archives

WKU Archives Collection Inventories

Notebooks, notes and papers written by Darwin Newton during his time as a student at WKU.


A Reproductive And Trophic Transfer Study Associated With Selenium Concentrations In The Upper Mud River Watershed, Amanda Lee Wilson Jan 2012

A Reproductive And Trophic Transfer Study Associated With Selenium Concentrations In The Upper Mud River Watershed, Amanda Lee Wilson

Theses, Dissertations and Capstones

Selenium in mining-related discharges has created concern in the Appalachian Region where coal is a significant resource. In West Virginia, evaluation of streams receiving mining discharges focused attention on the Mud River watershed where bioaccumulation of selenium was highest in preliminary surveys. Chronic exposure (mainly dietary) of mature female fish to selenium has the potential to cause developmental abnormalities in developing embryos due to the maternal transfer of selenium into the eggs. Literature suggests that factors affecting the bioaccumulation rate of selenium, and the concentration of selenium associated with the aforementioned effects are site-specific. The purpose of this study was …


An Hsi Report: Industrial Farm Animal Production And Livestock Associated Mrsa (Methicillin Resistant Staphylococcus Aureus), Humane Society International Jan 2012

An Hsi Report: Industrial Farm Animal Production And Livestock Associated Mrsa (Methicillin Resistant Staphylococcus Aureus), Humane Society International

HSI REPORTS

Staphylococcus aureus is a leading cause of bacterial infection and is increasingly found to be resistant to antibiotic therapy. A newly described type of Methicillin Resistant Staphylococcus aureus carried by farm animals, Livestock Associated MRSA (LA-MRSA), is now causing infections in humans with and without direct livestock contact. A reduction in the non-therapeutic use of antibiotics in feed would likely reduce the capacity of industrial animal agriculture to continue to create, disseminate, and perpetuate a large reservoir of LA-MRSA on a global scale, but more fundamental changes in the way animals are raised for food may be necessary forestall a …


Confronting Language, Representation, And Belief: A Limited Defense Of Mental Continuity, Kristin Andrews, Ljiljana Radenovic Jan 2012

Confronting Language, Representation, And Belief: A Limited Defense Of Mental Continuity, Kristin Andrews, Ljiljana Radenovic

Sentience Collection

According to the mental continuity claim (MCC), human mental faculties are physical and beneficial to human survival, so they must have evolved gradually from ancestral forms and we should expect to see their precursors across species. Materialism of mind coupled with Darwin’s evolutionary theory leads directly to such claims and even today arguments for animal mental properties are often presented with the MCC as a premise. However, the MCC has been often challenged among contemporary scholars. It is usually argued that only humans use language and that language as such has no precursors in the animal kingdom. Moreover, language is …


Clinical Anesthesia And Analgesia In Fish, Lynne U. Sneddon Jan 2012

Clinical Anesthesia And Analgesia In Fish, Lynne U. Sneddon

Veterinary Science and Medicine Collection

Fish have become a popular experimental model and companion animal, and are also farmed and caught for food. Thus, surgical and invasive procedures in this animal group are common, and this review will focus on the anesthesia and analgesia of fish. A variety of anesthetic agents are commonly applied to fish via immersion. Correct dosing can result in effective anesthesia for acute procedures as well as loss of consciousness for surgical interventions. Dose and anesthetic agent vary between species of fish and are further confounded by a variety of physiological parameters (e.g., body weight, physiological stress) as well as environmental …


Characterisation Of Chemosensory Trigeminal Receptors In The Rainbow Trout, Oncorhynchus Mykiss: Responses To Chemical Irritants And Carbon Dioxide, Jessica J. Mettam, Catherine R. Mccrohan, Lynne U. Sneddon Jan 2012

Characterisation Of Chemosensory Trigeminal Receptors In The Rainbow Trout, Oncorhynchus Mykiss: Responses To Chemical Irritants And Carbon Dioxide, Jessica J. Mettam, Catherine R. Mccrohan, Lynne U. Sneddon

Veterinary Science and Medicine Collection

Trigeminally innervated, mechanically sensitive chemoreceptors (M) were previously identified in rainbow trout, Oncorhynchus mykiss, but it is not known whether these receptors are responsive only to noxious, chemical irritants or have a general chemosensory function. This study aimed to characterise the stimulus–response properties of these receptors in comparison with polymodal nociceptors (P). Both P and M gave similar response profiles to acetic acid concentrations. The electrophysiological properties were similar between the two different afferent types. To determine whether the receptors have a nociceptive function, a range of chemical stimulants was applied to these receptors, including non-noxious stimuli such as ammonium …


Prevalence Of Antibodies To Canine Parvovirus And Distemper Virus In Wolves In The Canadian Rocky Mountains, Brynn Nelson, Mark Hebblewhite, Vanessa Ezenwa, Todd Shury, Evelyn H. Merrill, Paul C. Paquet, Fiona Schmiegelow, Dale Selp, Geoff Skinner, Nathan Webb Jan 2012

Prevalence Of Antibodies To Canine Parvovirus And Distemper Virus In Wolves In The Canadian Rocky Mountains, Brynn Nelson, Mark Hebblewhite, Vanessa Ezenwa, Todd Shury, Evelyn H. Merrill, Paul C. Paquet, Fiona Schmiegelow, Dale Selp, Geoff Skinner, Nathan Webb

Epidemiology Collection

Wild carnivores are often exposed to diseases via contact with peridomestic host species that travel through the wildland-urban interfaces. To determine the antibody prevalences and relationships to human activity for two common canid pathogens, we sampled 99 wolves (Canis lupus) from 2000 to 2008 for antibodies to canine parvovirus (CPV) and canine distemper virus (CDV) in Banff and Jasper National Parks and surrounding areas of the Canadian Rockies. This population was the source for wolves reintroduced into the Northern Rockies of the US. Of 99 wolves sampled, 94 had detectable antibody to CPV (95%), 24 were antibody-positive for CDV (24%), …


Animal Learning And Training: Implications For Animal Welfare, Sabrina I.C.A. Brando Jan 2012

Animal Learning And Training: Implications For Animal Welfare, Sabrina I.C.A. Brando

Assessment of Animal Welfare Collection

KEY POINTS

  • A definition of animal welfare is the state of the individual as it attempts to cope with its environment.
  • Welfare concerns all of the mechanisms for coping, involving physiology, behavior, feelings, and pathologic responses.
  • When training programs are not in place the animal’s welfare could be impaired.
  • Some of the behaviors an animal exhibits can be used to gain insight into how the animal feels about the environment, caretakers, and procedures.
  • Many contemporary animal trainers and care specialists focus on building relationships using positive reinforcement.


Extended Grazing: A Detailed Analysis Of Irish Dairy Farms, D. Läpple, T. Hennessy, M. O'Donovan Jan 2012

Extended Grazing: A Detailed Analysis Of Irish Dairy Farms, D. Läpple, T. Hennessy, M. O'Donovan

Farm Animal Husbandry Collection

Profitability and factors affecting grazing season length were econometrically analyzed using a representative sample of Irish dairy farms. The objective of this study was to explore what potential exists on Irish dairy farms to extend the grazing season and to quantify the possible economic benefits that result from lengthening the grazing season. Regression results indicate that location factors affect the length of the grazing season, but even when physical factors are controlled, farmer characteristics, such as education, also affect the grazing season length. The results of a panel data analysis show that significant cost reductions can be achieved by extending …


Mammary Cell Activity And Turnover In Dairy Cows Treated With The Prolactin-Release Inhibitor Quinagolide And Milked Once Daily, M. Boutinaud, V. Lollivier, L. Finot, R. M. Bruckmaier, P. Lacasse Jan 2012

Mammary Cell Activity And Turnover In Dairy Cows Treated With The Prolactin-Release Inhibitor Quinagolide And Milked Once Daily, M. Boutinaud, V. Lollivier, L. Finot, R. M. Bruckmaier, P. Lacasse

Physiology Collection

To assess the regulation of mammary cell activity, survival, and proliferation by prolactin (PRL), 5 Holstein cows in early lactation received daily i.m. injections of 1 mg of quinagolide, a suppressor of PRL release, for 9 wk, whereas 4 control cows received the vehicle (water) only. During the last week of treatment, one udder half was milked once a day (1×) and the other twice a day (2×). Mammary biopsies were harvested 1 wk before and 4 and 8 wk after the start of quinagolide treatment. The quinagolide injections reduced milk yield and resulted in lower levels of κ-casein and …


Effect Of Powder Source And Processing Conditions On The Solubility Of Milk Protein Concentrates 80, V. Sikand, Phillip S. Tong, S. Vink, J. Walker Jan 2012

Effect Of Powder Source And Processing Conditions On The Solubility Of Milk Protein Concentrates 80, V. Sikand, Phillip S. Tong, S. Vink, J. Walker

Dairy Science

No abstract provided.


Parasites Of Civets (Mammalia, Viverridae) In Sabah, Borneo: A Coprological Survey, Christina P. Colon, Sharon Patton Jan 2012

Parasites Of Civets (Mammalia, Viverridae) In Sabah, Borneo: A Coprological Survey, Christina P. Colon, Sharon Patton

Publications and Research

Parasite data were collected from unlogged and selectively logged lowland rain forests in Borneo. Scat from a female Viverra tangalunga (Malay civet) in the unlogged forest contained eggs of Capillaria spp., Trichuris sp., Mamomoganomus sp., and nematode larvae. Scat attributed to V. tangalunga contained reproductive products (eggs/oocysts/cysts/larvae) of Capillaria sp., Toxocara sp., Ancylostoma sp. (probably A. ceylanicum), Isospora spp., strongylate-type eggs (probably Ancylostoma spp.), Paragoni­ mus sp. and other Trematoda eggs, Monocystis sp. cysts, Gnathostoma sp. (probably G. spinigerum), the lungworm Viverrostrongylus brauni, pinworm-type eggs, Eimeria spp., Sarcocystis-type sporocyst, dermanysid mites and mesostigmatid mites. Parasites from gut samples from two …


West Coast Rock Lobster Managed Fishery Harvest Strategy And Decision Rules Framework Proposals Under A Quota Management System - A Discussion Paper, Western Australian Department Of Fisheries Jan 2012

West Coast Rock Lobster Managed Fishery Harvest Strategy And Decision Rules Framework Proposals Under A Quota Management System - A Discussion Paper, Western Australian Department Of Fisheries

Fisheries Management Papers

This paper outlines a set of updated proposals for use in the Harvest Strategy and Decision Rules framework (referred to as the HSDR) for the West Coast Rock Lobster Managed Fishery (WCRLMF)2, which have been developed to facilitate implementation of the new quota based management system. Where relevant, this current document utilises the information and outcomes presented in the previous discussion document on HSDR3 (Donohue et al., 2010) developed for use with the then input (effort) control management system that operated until 2009/10.


Ua66/5 Department Of Agriculture 2012 Newsletter, Department Of Agriculture And Food Science Jan 2012

Ua66/5 Department Of Agriculture 2012 Newsletter, Department Of Agriculture And Food Science

Agriculture Department Publications

No abstract provided.


New Vertebrate Records And Natural History Notes From Arkansas, M. B. Connior, R. Tumlison, H. W. Robison Jan 2012

New Vertebrate Records And Natural History Notes From Arkansas, M. B. Connior, R. Tumlison, H. W. Robison

Journal of the Arkansas Academy of Science

No abstract provided.


Inheritance Of Humeral Spotting In The Croaking Gourami (Osphronemidae: Trichopsis Vittatus), Jack Frankel, Lisa Alder-Golden, Andre Porter Jan 2012

Inheritance Of Humeral Spotting In The Croaking Gourami (Osphronemidae: Trichopsis Vittatus), Jack Frankel, Lisa Alder-Golden, Andre Porter

Department of Biology Faculty Publications

The croaking gourami (Trichopsis vittatus) exhibits two phenotypes associated with humeral spotting. Fish possess a prominent, dark humeral patch or spot located behind the operculum or lack this spotting pattern. Segregation patterns observed from the progenies of eleven different crosses support the hypothesis that the inheritance of humeral spotting in T. vittatus is controlled by the action of a single autosomal locus, with complete dominance of the allele controlling the spotted phenotype.


Effects Of Feeding Field Peas In Combination With Distillers Grains Plus Solubles In Finishing And Growing Diets On Cattle Performance And Carcass Characteristics, A. C. Pesta, A. H. Titlow, J. A. Hansen, A. L. Berger, S. A. Furman, Matt K. Luebbe, G. E. Erickson, K. H. Jenkins Jan 2012

Effects Of Feeding Field Peas In Combination With Distillers Grains Plus Solubles In Finishing And Growing Diets On Cattle Performance And Carcass Characteristics, A. C. Pesta, A. H. Titlow, J. A. Hansen, A. L. Berger, S. A. Furman, Matt K. Luebbe, G. E. Erickson, K. H. Jenkins

Department of Animal Science: Faculty Publications

Two studies were conducted to evaluate field peas and wet or dry corn distillers grains with solubles (WDGS and DDGS, respectively) in finishing and growing diets. In Exp. 1, British crossbred steers (n = 352, initial BW 356 ± 27 kg) were used in a randomized block design with factors being 0 or 20% field peas and 0 or 30% WDGS in dry-rolled corn (DRC) based finishing diets (DM basis). There was an interaction (P < 0.01) for DMI and G:F. Feeding WDGS increased ADG (P < 0.01), whereas peas had no effect on ADG (P = 0.33). Including WDGS increased G:F in diets without peas (P < 0.01), but had no impact (P = 0.12) in diets containing peas. Peas increased G:F (P = 0.04) in diets without WDGS, but decreased G:F (P = 0.03) with WDGS. Feeding WDGS increased HCW (P < 0.01). In Exp. 2, Continental crossbred heifers (yr. 1; n = 108, initial BW 338 ± 14 kg) and British crossbred steers (yr. 2; n = 90, initial BW 321 ± 10 kg) were assigned randomly to 1 of 9 pastures. Treatments were supplementation with loose DDGS meal on the ground (GROUND), in a bunk (BUNK) or a 25% field peas, 75% DDGS cube on the ground (CUBE) at equal CP. Final BW and ADG were less (P < 0.01) for GROUND than for CUBE and BUNK, which were similar. These data indicate up to 50% DRC could be replaced by peas and WDGS, and peas are an acceptable binder for DDGS range cubes.


American Society Of Parasitologists Newsletter, V. 34, No. 2, Winter 2012, Scott Lyell Gardner Jan 2012

American Society Of Parasitologists Newsletter, V. 34, No. 2, Winter 2012, Scott Lyell Gardner

American Society of Parasitologists: Newsletter

American Society of Parasitologists Newsletter, v. 34, no. 2, winter 2012


Phylogeny Of Shiga Toxin-Producing Escherichia Coli O157 Isolated From Cattle And Clinically Ill Humans, James L. Bono, Timothy P. L. Smith, James E. Keen, Gregory P. Harhay, Tara G. Mcdaneld, Robert E. Mandrell, Woo Kyung Jung, Thomas E. Besser, Peter Gerner-Smidt, Martina Bielaszewska, Helge Karch, Michael L. Clawson Jan 2012

Phylogeny Of Shiga Toxin-Producing Escherichia Coli O157 Isolated From Cattle And Clinically Ill Humans, James L. Bono, Timothy P. L. Smith, James E. Keen, Gregory P. Harhay, Tara G. Mcdaneld, Robert E. Mandrell, Woo Kyung Jung, Thomas E. Besser, Peter Gerner-Smidt, Martina Bielaszewska, Helge Karch, Michael L. Clawson

Roman L. Hruska U.S. Meat Animal Research Center: Reports

Cattle are a major reservoir for Shiga toxin-producing Escherichia coli O157 (STEC O157) and harbor multiple genetic subtypes that do not all associate with human disease. STEC O157 evolved from an E. coli O55:H7 progenitor; however, a lack of genome sequence has hindered investigations on the divergence of human- and/or cattle-associated subtypes. Our goals were to 1) identify nucleotide polymorphisms for STEC O157 genetic subtype detection, 2) determine the phylogeny of STEC O157 genetic subtypes using polymorphism-derived genotypes and a phage insertion typing system, and 3) compare polymorphism-derived genotypes identified in this study with pulsed field gel electrophoresis (PFGE), the …


Working Trees For Livestock Jan 2012

Working Trees For Livestock

Working Trees (USDA-NAC)

Conventional wisdom in the past has been that livestock and trees can’t co-exist. Yet moderm agricultural practice is showing their livestock and trees not only can co-exist, but, if properly managed, can provide additional income from land formerly used for a single crop.

Trees can provide livestock with protection from cold wind and blowing snow in winter, as well as from the hot sun and drying winds of summer. And, if commercially desirable timber or nut trees are planted, landowners can enjoy significant additional income from this diverse use of their land.

This publication will acquaint you with some of …


Creation Of A Natural History Information Database With Mobile Device Access For The Pace Campus In Pleasantville, Joshua J. Schwartz, Martina Blackwood Jan 2012

Creation Of A Natural History Information Database With Mobile Device Access For The Pace Campus In Pleasantville, Joshua J. Schwartz, Martina Blackwood

Cornerstone 3 Reports : Interdisciplinary Informatics

No abstract provided.


Economic Impact Of Stable Flies (Diptera: Muscidae) On Dairy And Beef Cattle Production, David B. Taylor, Roger D. Moon, Darrell R. Mark Jan 2012

Economic Impact Of Stable Flies (Diptera: Muscidae) On Dairy And Beef Cattle Production, David B. Taylor, Roger D. Moon, Darrell R. Mark

Department of Agricultural Economics: Faculty Publications

Stable flies, Stomoxys calcitrans (L.), are among the most damaging arthropod pests of cattle worldwide. The last estimate of their economic impact on United States cattle production was published 20 yr ago and placed losses at $608 million. Subsequently, several studies of effects of stable flies on beef cattle weight gain and feed efficiency have been published, and stable flies have become increasingly recognized as pests of cattle on pasture and range. We analyzed published studies and developed yield-loss functions to relate stable fly infestation levels to cattle productivity, and then estimated the economic impact of stable flies on cattle …


The Feasibility Of Switchgrass For Biofuel Production, Rob Mitchell, Kenneth P. Vogel, Daniel R. Uden Jan 2012

The Feasibility Of Switchgrass For Biofuel Production, Rob Mitchell, Kenneth P. Vogel, Daniel R. Uden

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Switchgrass research has been conducted cooperatively by the US Department of Agriculture and the University of Nebraska since the mid-1930s, with a primary focus on bioenergy since 1990 at several institutions. Progress has been made in switchgrass breeding and genetics, molecular genetics, establishment, fertility management, production economics, production energetics, harvest and storage management, ecosystem services and ethanol yield. A complete field-validated biomass production system has been developed for the Midwest and Central Plains. Even with favorable economic and sustainability results from field trials, switchgrass for bioenergy has not been adopted on a large scale. Lack of adoption is likely due …


Effect Of Parentage Misidentification On Estimates Of Genetic Parameters For Milk Yield In The Mediterranean Italian Buffalo Population, Emanuela Parlato, L. Dale Van Vleck Jan 2012

Effect Of Parentage Misidentification On Estimates Of Genetic Parameters For Milk Yield In The Mediterranean Italian Buffalo Population, Emanuela Parlato, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

The objective of this study was to evaluate the effect of parentage misidentification on estimation of genetic parameters for the Italian buffalo population for milk yield from 45,194 lactation records of 23,104 Italian buffalo cows. Animals were grouped into 10 data sets in which sires and dams were DNA identified, or reported from the pedigree, or unknown. A derivativefree restricted maximum likelihood method was used to estimate components of variance with a repeatability model. The model contained age at calving nested within parity and days from calving to conception as linear covariates, herd-year-seasons as fixed effects, and additive genetic, permanent …


A High Density Snp Array For The Domestic Horse And Extant Perissodactyla: Utility For Association Mapping, Genetic Diversity, And Phylogeny Studies, Molly E. Mccue, Danika L. Bannasch, Jessica Lynn Petersen, Jessica Gurr, Ernie Bailey, Matthew M. Binns, Ottmar Distl, Gérard Guérin, Telhisa Hasegawa, Emmeline W. Hill, Tosso Leeb, Gabriella Lindgren, M. Cecilia T. Penedo, Knut H. Røed, Oliver A. Ryder, June E. Swinburne, Teruaki Tozaki, Stephanie J. Valberg, Mark Vaudin, Kerstin Lindblad-Toh, Claire M. Wade, James R. Mickelson Jan 2012

A High Density Snp Array For The Domestic Horse And Extant Perissodactyla: Utility For Association Mapping, Genetic Diversity, And Phylogeny Studies, Molly E. Mccue, Danika L. Bannasch, Jessica Lynn Petersen, Jessica Gurr, Ernie Bailey, Matthew M. Binns, Ottmar Distl, Gérard Guérin, Telhisa Hasegawa, Emmeline W. Hill, Tosso Leeb, Gabriella Lindgren, M. Cecilia T. Penedo, Knut H. Røed, Oliver A. Ryder, June E. Swinburne, Teruaki Tozaki, Stephanie J. Valberg, Mark Vaudin, Kerstin Lindblad-Toh, Claire M. Wade, James R. Mickelson

Department of Animal Science: Faculty Publications

An equine SNP genotyping array was developed and evaluated on a panel of samples representing 14 domestic horse breeds and 18 evolutionarily related species. More than 54,000 polymorphic SNPs provided an average inter-SNP spacing of ~43 kb. The mean minor allele frequency across domestic horse breeds was 0.23, and the number of polymorphic SNPs within breeds ranged from 43,287 to 52,085. Genome-wide linkage disequilibrium (LD) in most breeds declined rapidly over the first 50–100 kb and reached background levels within 1–2 Mb. The extent of LD and the level of inbreeding were highest in the Thoroughbred and lowest in the …


Index Selection In Terminal Sires Improves Early Lamb Growth, G. C. Márquez, W. Haresign, M. H. Davies, G. C. Emmans, Rainer Roehe, L Bünger, G. Simm, Ronald M. Lewis Jan 2012

Index Selection In Terminal Sires Improves Early Lamb Growth, G. C. Márquez, W. Haresign, M. H. Davies, G. C. Emmans, Rainer Roehe, L Bünger, G. Simm, Ronald M. Lewis

Department of Animal Science: Faculty Publications

The use of terminal sires (TS) for crossbreeding is integral to the UK sheep industry where approximately 71% of market lambs are sired by TS rams. Early growth of these crossbred lambs affects profitability. The objectives of this study were i) to evaluate the effectiveness of index selection among TS on BW and ADG of their crossbred offspring; and ii) to compare the efficacy of that selection within TS breeds. The most widely used TS breeds in the United Kingdom are Charollais, Suffolk, and Texel. These participated in sire referencing schemes in which they were evaluated on a lean growth …