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Articles 1 - 21 of 21
Full-Text Articles in Life Sciences
Comparison Of Models To Estimate Genetic Effects For Weaning Weight Of Angus Cattle, J. Dodenhoff, L. Dale Van Vleck, D. E. Wilson
Comparison Of Models To Estimate Genetic Effects For Weaning Weight Of Angus Cattle, J. Dodenhoff, L. Dale Van Vleck, D. E. Wilson
Department of Animal Science: Faculty Publications
Weaning weights from nine sets of Angus field data from three regions of the United States were analyzed. Six animal models were used to compare two approaches to account for an environmental dam-offspring covariance and to investigate the effects of sire × herd-year interaction on the genetic parameters. Model 1 included random direct and maternal genetic, maternal permanent environmental, and residual effects. Age at weaning was a covariate. Other fixed effects were age of dam and a herd-year-management-sex combination. Possible influence of a dam’s phenotype on her daughter’s maternal ability was modeled by including a regression on maternal phenotype (f …
Effect Of Blue Light And Temperature On Leaf Expansion, Stem Elongation, And Growth, Tracy A. O. Dougher
Effect Of Blue Light And Temperature On Leaf Expansion, Stem Elongation, And Growth, Tracy A. O. Dougher
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Short height and high yield per unit energy in controlled environments are essential to the success of a food production system for spaceflight. Temperature and light quality can be manipulated in controlled environments to reduce plant height and increase yield. Although the effects of temperature on height and yield are well studied at ambient CO2, temperature effects at elevated CO2 with a hydroponic root zone are not well characterized. We studied soybean yield and height under two lamp types over a broad range of temperatures. Temperature had little effect on yield or height, but lamp type had …
Coupling Between Bacterioplankton Species Composition, Population Dynamics, And Organic Matter Degradation, Jarone Pinhassi, Farooq Azam, Johanna Hemphälä, Richard A. Long, Josefina Martinez, Ulla Li Zweifel, Åke Hagström
Coupling Between Bacterioplankton Species Composition, Population Dynamics, And Organic Matter Degradation, Jarone Pinhassi, Farooq Azam, Johanna Hemphälä, Richard A. Long, Josefina Martinez, Ulla Li Zweifel, Åke Hagström
Faculty Publications
To study the effect of substrate addition on short term bacterial population dynamics and species composition in seawater mesocosms were maintained with water collected off Scripps Pier (La Jolla, California USA) Protein enrichment (BSA) triggered a dynamic response from the microbial food web, whereas enrichment with starch had no effect. In the protein enriched mesocosm the number of both nucleoid-containing cells and metabolically active cells increased by 3.0 X 105 cells ml-1 from Day 1 to Day 4 In the same time period the density of a set of 31 phylogenetically different bacteria (α- and g-Proteobactena as well …
Variance Components And Breeding Values For Growth Traits From Different Statistical Models, G. B. Ferreira, M. D. Macneil, L. Dale Van Vleck
Variance Components And Breeding Values For Growth Traits From Different Statistical Models, G. B. Ferreira, M. D. Macneil, L. Dale Van Vleck
Department of Animal Science: Faculty Publications
Estimates of genetic parameters resulting from various analytical models for birth weight (BWT, n = 4,155), 205-d weight (WWT, n = 3,884), and 365-d weight (YWT, n = 3,476) were compared. Data consisted of records for Line 1 Hereford cattle selected for postweaning growth from 1934 to 1989 at ARSUSDA, Miles City, MT. Twelve models were compared. Model 1 included fixed effects of year, sex, age of dam; covariates for birth day and inbreeding coefficients of animal and of dam; and random animal genetic and residual effects. Model 2 was the same as Model 1 but ignored inbreeding coefficients. Model …
Estimation Of Direct, Maternal, And Grandmaternal Genetic Effects For Weaning Weight In Several Breeds Of Beef Cattle, J. Dodenhoff, L. Dale Van Vleck, K. E. Gregory
Estimation Of Direct, Maternal, And Grandmaternal Genetic Effects For Weaning Weight In Several Breeds Of Beef Cattle, J. Dodenhoff, L. Dale Van Vleck, K. E. Gregory
Department of Animal Science: Faculty Publications
Weaning weights from nine parental breeds and three composites were analyzed to estimate variance due to grandmaternal genetic effects and to compare estimates for variance due to maternal genetic effects from two different models. Number of observations ranged from 794 to 3,465 per population. Number of animals in the pedigree file ranged from 1,244 to 4,326 per population. Two single-trait animal models were used to obtain estimates of covariance components by REML using an average information method. Model 1 included random direct and maternal genetic, permanent maternal environmental, and residual environmental effects as well as fixed sex ´ year and …
The Effects Of Some Plant Materials On The Growth And Productivity Ofpleurotus Floridafovose, Abdunnasır Yildiz
The Effects Of Some Plant Materials On The Growth And Productivity Ofpleurotus Floridafovose, Abdunnasır Yildiz
Turkish Journal of Biology
In this study, the soybean, sorghum, peanut and wheat straw were used as culture media for Pleurotus florida. The shortest period for mycelium growth on soybean straw was 10.8 days; basidiocarp formation period, the first, second and third harvesting periods were determined as; 28.2, 33.6, 47.2 and 63.8, days respectively as the shortes periods found with peonut straw; 23.2, 59.5, 63.5, 75.2 and 94.0 days respectively, as the longest periods found with sorghum straw. The fresh mushroom yield obtained with 100 g material (70 % moisture) at first, second, third harvesting periods and total yield was 11.2, 7.7, 4.8 and …
The Growth And Reproduction Characteristics Of Chub Leuciscus Cephalus Orientalis (Nordmann, 1840) Living In The River Aras, Mustafa Türkmen, H. İbrahi̇m Hali̇loğlu, Orhan Erdoğan, Ayhan Yildirim
The Growth And Reproduction Characteristics Of Chub Leuciscus Cephalus Orientalis (Nordmann, 1840) Living In The River Aras, Mustafa Türkmen, H. İbrahi̇m Hali̇loğlu, Orhan Erdoğan, Ayhan Yildirim
Turkish Journal of Zoology
In this study, the populations structure, growth and reproduction characteristics of 1091 Leuciscus cephalus orientalis from the Yagan Region of River Aras between December 1995 and November 1997 were investigated monthly. The age composition of this species ranged between I and VIII. Individuals were composed of 48.85% males and 51.15% females. Female individuals attained greater size and age than males. The largest Female captured was 27.5 cm FL and age VIII, while the largest male was 24.1 cm FL and age VIII. Von Bertalanffy growth equations (in length and weight) and length-weight relationships were found as Lt=32.47(1-e -0.1217(t+1.63) ), Wt=502.10(1-e …
The Growth Features Of Pike (Esox Lucius L., 1758) In Dam Lake Kesikköprü, Ahmet Altindağ, Si̇bel Yi̇ği̇t, Seyhan Ahiska, Şaki̇r Özkurt
The Growth Features Of Pike (Esox Lucius L., 1758) In Dam Lake Kesikköprü, Ahmet Altindağ, Si̇bel Yi̇ği̇t, Seyhan Ahiska, Şaki̇r Özkurt
Turkish Journal of Zoology
In this study, the growth properties of pike (Esox lucius L., 1758) in Dam Lake Kesikköprü between April 1995 and March 1996 were examined. In the examined samples, the age of females and males ranged from I-V and I-IV respectively. The population was composed of 55 % males and 45' % females. The forked length and weight of females and males varied from 18,7 to 49,4 cm., from 265 to 1100 g, and from 16,5 to 53,0 cm., from 260 to 1140 g., respectively. Age-length and age-weight relations were calculated according to the von Bertalanffy growth equation formula. The following …
Growth Properties Of Bass (Dicentrarchus Labrax (L., 1758), Perciformes: Serranidae) Live In Akgöl-Paradeniz Lagoon In Göksu Delta, Serap Ergene Gözükara
Growth Properties Of Bass (Dicentrarchus Labrax (L., 1758), Perciformes: Serranidae) Live In Akgöl-Paradeniz Lagoon In Göksu Delta, Serap Ergene Gözükara
Turkish Journal of Zoology
The age composition of 415 specimens of Dicentrarchus labrax caught from Akgöl-Paradeniz Lagoon, between February 1992 and July 1994, ranged between 0.-X. age groups.. The II.nd ages group of D. labrax is dominant in all individuals with a rate of 32.05 %. Average fork lenght according to ages group of D.labrax is ranged between 177,14 mm. and 700,0 mm. Average weight value according to ages group of D.labrax is varied between 63.35 and 3475 g..The value of condition factor for all indivuduals is determined for 2nd ages as 2.31 maximum and for 2nd age as 0.60 minimum. The annual and …
The Effect Of Water On Growth, Food Consumption, Feces Quantity, Digestive Activity And Glycogen Level Of Gryllus Bimaculatus (Orthoptera: Gryllidae), Ati̇la Yanikoğlu
The Effect Of Water On Growth, Food Consumption, Feces Quantity, Digestive Activity And Glycogen Level Of Gryllus Bimaculatus (Orthoptera: Gryllidae), Ati̇la Yanikoğlu
Turkish Journal of Zoology
In this study, the effect of water on growth (wet weight gain), food consumption, feces quantity, digestive activity and glycogen level of Gryllus bimaculatus female adults was investigated by doing the experiments of feeding and starvation. Wheat bran was given for feeding. All parameters were found to be significantly higher in insects feeding with water than those feeding without water. A significant difference did not occur in mean wet weight and glycogen level in insects either feeding without water or starved for one week. At the end of the experimental period, a wet weight gain (43%) was observed only in …
Comparative Study Of Selenium Requirements Of Three Phytoplankton Species: Gymnodinium Catenatum, Alexandrium Minutum (Dinophyta) And Chaetoceros Cf. Tenuissimus (Bacillariophyta, Martina A. Doblin, Susan I. Blackburn, Gustaaf M. Hallegraeff
Comparative Study Of Selenium Requirements Of Three Phytoplankton Species: Gymnodinium Catenatum, Alexandrium Minutum (Dinophyta) And Chaetoceros Cf. Tenuissimus (Bacillariophyta, Martina A. Doblin, Susan I. Blackburn, Gustaaf M. Hallegraeff
OES Faculty Publications
This study investigated the selenium (Se) requirements of three phytoplankton species which commonly bloom in southern Australian estuaries. The present study showed that the toxic dinoflagellate Gymnodinium catenatum Graham had an obligate requirement for Se (IV) in culture. After two transfers (~ 4 weeks ≈ 7 generations) in Se-deficient seawater medium, this phytoplankton species exhibited a decline in growth rate (25%) and biomass yield (90%), while complete cessation of cell division occurred under prolonged (8 weeks ≈ 12 generations) Se starvation. Addition of 10-9-10-7 M H2SeO3 to nutrient-enriched seawater medium resulted in increased G.catenatum …
Growth And Mortality Of Mussels ( Mytilus Edulisl.) Reared Inlantern Nets In Loch Kishorn, Scotland, Sedat Karayücel, Ismi̇han Karayücel
Growth And Mortality Of Mussels ( Mytilus Edulisl.) Reared Inlantern Nets In Loch Kishorn, Scotland, Sedat Karayücel, Ismi̇han Karayücel
Turkish Journal of Veterinary & Animal Sciences
One-year old rope grown mussels ( Mytilus edulis L.) were held in experimental lantern nets at 2 m and 6 m depths in Loch Kishorn on the west coast of Scotland. Growth, mortality and shell morphology were monitored from May 1993 to August 1994. Water temperature, salinity, transparency and food availability were also determined. These showed a clear seasonal cycle, in consequence, growth of mussels was relatively rapid from May to November and very slow during the rest of the year. Depth had a insignificant effect on shell length and tissue growth (P>0.05) due to similar environmental factors. Shell …
Cattle Production In The Gascoyne And Interior Regions Of Western Australia; A Report On The Cunyu Demographic Study (1990-1998) And The Mt Clere Producer Demonstration Site (1993-1997), Andrew Thomson
Agriculture reports
Although Producer Demonstration Sites have been staged widely in the northern parts of Australia, the events at Cunyu and Mt Clere herald a first for such an in-depth investigation in the mulga shrub lands of Western Australia.
Resource Allocation And Sucrose Mobilization In Light Limited Eelgrass Zostera Marina, Teresa Alcoverro, Richard C. Zimmerman, Donald G. Kohrs, Randall S. Alberte
Resource Allocation And Sucrose Mobilization In Light Limited Eelgrass Zostera Marina, Teresa Alcoverro, Richard C. Zimmerman, Donald G. Kohrs, Randall S. Alberte
OES Faculty Publications
This study evaluated the ability of Zostera marina L. (eelgrass) to balance the daily photosynthetic deficit by mobilization of carbon reserves stored in below-ground tissues during a period of extreme winter light limitation. A quantitative understanding of the mobilization process and its limitations is essential to the development of robust models predicting minimum light levels required to maintain healthy seagrass populations. Plants were grown in running seawater tanks under 2 light regimes. One treatment was provided with 2 h irradiance-saturated photosynthesis (Hsat) to produce severe Light Limitation, while control plants were grown under 7 h Hsat, …
Comparison Of Some Production Traits In Malya And Akkaraman Sheep, Nadi̇ Çolakoğlu, Ceyhan Özbeyaz
Comparison Of Some Production Traits In Malya And Akkaraman Sheep, Nadi̇ Çolakoğlu, Ceyhan Özbeyaz
Turkish Journal of Veterinary & Animal Sciences
Summary : This research was carried out to compare the fertility traits, greasy fleece weight and wool characteristics in breeding ewes; and the growth and survival rates of lambs in Ankaraman and Malya breeds. The data was obtained for fertility traits from 5581 Malya and 9707 Akkaraman ewes, for growth rates from 100 lambs in each breed, for greasy fleece weights from 100 ewes in each breed and for wool characteristics from 32 Malya and 28 Akkaraman ewes. Fertility traits such as lambing percentage, twinning rate, litter size and number of lambs weaned per hundred ewes lambing between 1992 and …
Growth Performance, Food Intake And Feed Converison Ratios In Rainbow (Onchorynchus Mykiss) And Brook Trout (Salvelinus Fontinalis) Reared As A Single And Mixed Species, İbrahi̇m Okumuş, M. Sali̇h Çeli̇kkale, İlker Zeki̇ Kurtoğlu, Nadi̇r Başçinar
Growth Performance, Food Intake And Feed Converison Ratios In Rainbow (Onchorynchus Mykiss) And Brook Trout (Salvelinus Fontinalis) Reared As A Single And Mixed Species, İbrahi̇m Okumuş, M. Sali̇h Çeli̇kkale, İlker Zeki̇ Kurtoğlu, Nadi̇r Başçinar
Turkish Journal of Veterinary & Animal Sciences
Growth performances, daily food consumption and feed conversion ratios of rainbow (Onchorynchus mykiss) and brook trout (Salvelinus fontinalis) reared as single and mixed species were compared. During the experimental period, which lasted for about a growing season (December - June, 217 days), mean % weight increment of single species brook trout group were maximum (from 18.2 to 165.6 g), followed by mixed rainbow (26.8 to 241.6 g) and brook trout (17.0 to 151.8 g), and single species rainbow trout (27.5 to 207.6 g). Rates of increment in biomass were in similar order. Final mean weights of single species brook trout …
A Research On The Growth Rate On The Mullet (Mugil Auratus Risso, 1810) Fingerlings Fed Different Diets In Cages, Gülçi̇n Ağirağaç, Mustafa Kalma
A Research On The Growth Rate On The Mullet (Mugil Auratus Risso, 1810) Fingerlings Fed Different Diets In Cages, Gülçi̇n Ağirağaç, Mustafa Kalma
Turkish Journal of Veterinary & Animal Sciences
This research was conducted to determine the effect of different feeds on the growth rate of mullet juveniles (M. auratus R. 1810). Juveniles with a initial mean weight of 14.15 g and 14.71 g were feed a semi-moist diet (%50 trout viscera + %25 soybean meal + %25 high quality wheat bran) and carp pellets for a period of 60 days in marine cages. At the end of the experiment, final average weights were determined as 28.83± 0.6 g and 22.04±0.6 g have been obtained, respectively. The difference between the two harvesting weights was found statistically significant (P
Some Biological Characteristics Of Picarel (Spicara Smaris, Linnaeus 1758) In The Eastern Black Sea Coast Of Turkey, Temel Şahi̇n, Yaşar Genç
Some Biological Characteristics Of Picarel (Spicara Smaris, Linnaeus 1758) In The Eastern Black Sea Coast Of Turkey, Temel Şahi̇n, Yaşar Genç
Turkish Journal of Zoology
In this study, the following biological characteristics of picarel (Spicara smaris, Linnaeus 1758) in the Eastern Black Sea Coast have been examined: sex and age distribution, growth in length and weight, growth rates, condition factor and spawning period. A total of 456 individuals, ranged between age groups I-VI, have been composed by 61.41 % females, 38.58 a/o males. The length and weight differences between females and males were significant in age group II (P
Some Biological Characteristics Of Sprat (Sprattus Sprattus Phalericus Risso, 1826) On The Eastern Black Sea Coast, Temel Şahi̇n
Some Biological Characteristics Of Sprat (Sprattus Sprattus Phalericus Risso, 1826) On The Eastern Black Sea Coast, Temel Şahi̇n
Turkish Journal of Zoology
In this study, biological characteristics i.e. sex and age distribution, growth (in length and weight), growth rates, and condition factor of sprat (Sprattus sprattus phalericus) from the Eastern Blak Sea coast have been examined. The percentage of females and males was 57.53 % and 42.47 % out of 372 specimens which ranged between age group I and IV. Age groups II and III were also predominant in the catch composition. The mean length values were 10.72±0.052 cm for females, 10.67±0.253 cm for males and 10.69±0.038 for both sexes (female+male). The length and weight differences between females and males were not …
Growth Properties Of Chub (Leuciscus Cephalus L., 1758) In Lake Tödürge (Zara/Sivas), Bülent Ünver, Jüli̇de Tanyolaç
Growth Properties Of Chub (Leuciscus Cephalus L., 1758) In Lake Tödürge (Zara/Sivas), Bülent Ünver, Jüli̇de Tanyolaç
Turkish Journal of Zoology
In this research, sex and age compositions, age-length, age-weight, length-weight relations, condition factors were investigated on 674 chub (Leuciscus cephalus L., 1758) specimens caught from Lake Tödürge, Sivas between April and November 1994. The age composition of L. cephalus specimens were between I-VII years and sex percentages were calculated as 68.25 % for females and 31.75 % for males. Determined minimum and maximum forklength values were 53 and 299 mm; weights were 1.5 and 347.1 g. Von Bertalanffy equations of L. cephalus specimens as length-growth and weight-growth were established as L_t = 474.19 [1-e^{-0.10608(t+0.3805)}] for females; L_t = 545.26 [1-e …
An Investigation On The Growth Criterias Of Leuciscus Cephalus In Çıldır Lake-Ardahan, Sedat Vahdet Yerli̇, Mustafa Çalişkan, Ali̇ Fuat Canbolat
An Investigation On The Growth Criterias Of Leuciscus Cephalus In Çıldır Lake-Ardahan, Sedat Vahdet Yerli̇, Mustafa Çalişkan, Ali̇ Fuat Canbolat
Turkish Journal of Zoology
A total of 506 Leuciscus cephalus were caught in the Çıldır Lake-Ardahan from May to December 1991. The age composition of L.cephalus specimens were between II-VI years and III years olds dominated with a rate of 67.26%. In the stock the percentages were calculated as 73.00% for males and 27.00% for females. According to age groups II-VI, to average forklengths were 140.72 mm; 179.39 mm; 253.03 mm; 322.85 mm and 354.00 mm; average weights were 47.49g; 83.68g; 234.18g; 498.69 g and 596.25 g Determined minimum and maximum forklengths were 112 and 390 mm; weights were 30 and 720 g