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2007

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Articles 481 - 510 of 679

Full-Text Articles in Animal Sciences

Stock Assessment And Management Of The Egyptian Sole Solea Aegyptiaca Chabanaud, 1927 (Osteichthyes: Soleidae), In The Southeastern Mediterranean, Egypt, Sahar Fahmy Mehanna Jan 2007

Stock Assessment And Management Of The Egyptian Sole Solea Aegyptiaca Chabanaud, 1927 (Osteichthyes: Soleidae), In The Southeastern Mediterranean, Egypt, Sahar Fahmy Mehanna

Turkish Journal of Zoology

Aspects of the population dynamics of the Egyptian sole, Solea aegyptiaca, which is a commercially important endemic and demersal flatfish species in the Egyptian Mediterranean waters, were described based on materials collected monthly between February 2004 and May 2005 from the fishing harbor at Port Said city. Age and growth studies based on sagittal otoliths revealed that this species is relatively fast growing with a maximum age of 4 years. Marginal increment analysis suggested that bands on sagittae are deposited once a year during the winter. Mean back-calculated total lengths ranged from 17.75 cm at age I to 28.22 cm …

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Life Cycle Of Gammarus Pulex (L.) In The River Yeşilırmak, Mustafa Duran Jan 2007

Life Cycle Of Gammarus Pulex (L.) In The River Yeşilırmak, Mustafa Duran

Turkish Journal of Zoology

Monthly sampling of Gammarus pulex for 45 months in the River Yeşilırmak showed that the mean seasonal population density increased to a maximum in summer, and then declined to the lowest level in winter. There was a consistent seasonal pattern of body length distributions, characterised by the arrival of a strong cohort of new juveniles in spring and early summer. The ovigerous adults were few in autumn, peaked around January to March, and were virtually absent from July to October. Estimated sex ratios obtained from the field in general seem to show that females predominated, except in summer.

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A Preliminary Study Of The Food Of The Dwarf Snake, Eirenis Modestus (Martin, 1838) (Serpentes: Colubridae), In İzmir And Manisa Provinces, Keri̇m Çi̇çek, Ahmet Mermer Jan 2007

A Preliminary Study Of The Food Of The Dwarf Snake, Eirenis Modestus (Martin, 1838) (Serpentes: Colubridae), In İzmir And Manisa Provinces, Keri̇m Çi̇çek, Ahmet Mermer

Turkish Journal of Zoology

The stomach contents of 14 (4 Female Female, 4 Male Male and 6 juveniles) Eirenis modestus specimens captured during various field studies in İzmir and Manisa provinces were examined, and a total of 44 prey items were found. An analysis of the stomach contents revealed that prey belonging to the classes Insecta (75%), Chilopoda (11%), and Reptilia (2%) constituted the diet of the species; the remaining prey could not be identified. The most frequently consumed prey were the orders Coleoptera (32%) and Orthoptera (21%) by number; Coleoptera (36%), Orthoptera (36%), and Scolopendromorpha (29%) by frequency; and Scolopendromorpha (72%) by volume. …

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Detection Of The Eaea Gene In Escherichia Coli From Chickens By Polymerase Chain Reaction, Ayşe Kiliç, Hasan Basri̇ Ertaş, Adi̇le Muz, Gökben Özbey, Hakan Kalender Jan 2007

Detection Of The Eaea Gene In Escherichia Coli From Chickens By Polymerase Chain Reaction, Ayşe Kiliç, Hasan Basri̇ Ertaş, Adi̇le Muz, Gökben Özbey, Hakan Kalender

Turkish Journal of Veterinary & Animal Sciences

The aim of this study was to isolate Escherichia coli from chickens and to determine the presence of the eaeA gene, a virulence factor detected in E. coli, in the isolates by polymerase chain reaction (PCR). Different chicken organs were inoculated onto blood agar and biochemical tests were performed on the suspicious isolates. E. coli was isolated from 48% (48/100) of the samples. DNA was extracted from these isolates and was amplified by PCR, using a pair of primers derived from the eaeA (virulence) gene. In the agarose gel examination of PCR products, 48% (48/100) of the isolates were determined …

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Comparison Of Spermatological Characteristics And Biochemical Seminal Plasma Parameters Of Normozoospermic And Oligoasthenozoospermic Bulls Of Two Breeds, Mesut Çevi̇k, Pürhan Barbaros Tuncer, Umut Taşdemi̇r, Taner Özgürtaş Jan 2007

Comparison Of Spermatological Characteristics And Biochemical Seminal Plasma Parameters Of Normozoospermic And Oligoasthenozoospermic Bulls Of Two Breeds, Mesut Çevi̇k, Pürhan Barbaros Tuncer, Umut Taşdemi̇r, Taner Özgürtaş

Turkish Journal of Veterinary & Animal Sciences

The aim of this study was to investigate the differences in spermatological and seminal plasma biochemical characteristics between normozoospermic and oligoasthenozoospermic bulls. A total of 8 bulls were used and they were divided into 4 groups: Holstein normozoospermic (HN) and oligoasthenozoospermic (HO), and Brown Swiss normozoospermic (BSN) and oligoasthenozoospermic (BSO). Spermatological parameters investigated included semen volume, color, concentration, motility, and percentage of abnormal sperm. Biochemical parameters measured in seminal plasma included pH, glucose, urea, creatinine, uric acid, cholesterol (CH), triglyceride, Mg, inorganic P (P_i), Ca, Na, K, and Cl ion concentrations. Colorimetric and ion selective electrode methods were used for …

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Morphological Studies On Ovarian Mast Cells In The Cow, Asuman Özen, Levent Ergün, Emel Ergün, Nejdet Şi̇mşek Jan 2007

Morphological Studies On Ovarian Mast Cells In The Cow, Asuman Özen, Levent Ergün, Emel Ergün, Nejdet Şi̇mşek

Turkish Journal of Veterinary & Animal Sciences

This study was conducted on cows in the estrual and luteal phases of the cycle to determine the staining properties, light and electron microscopic appearance and numerical distribution of mast cells from various areas of the ovary. The material for the study comprised ovarian specimen taken from 14 cows, 7 in the luteal phase and 7 in the estrual phase of the sexual cycle. Specimens were taken from 3 different areas of the ovaries, including those surrounding the corpus luteum, the graafian follicle and the medulla. From all 3 areas, mast cells were demonstrated as metachromatic staining after treatment of …

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A Serological Investigation Of Pelodytes Caucasicus And Pelobates Syriacus (Amphibia, Anura) Populations In Turkey, Murat Tosunoğlu, Hüseyi̇n Arikan Jan 2007

A Serological Investigation Of Pelodytes Caucasicus And Pelobates Syriacus (Amphibia, Anura) Populations In Turkey, Murat Tosunoğlu, Hüseyi̇n Arikan

Turkish Journal of Zoology

Blood serum proteins of specimens belonging to Pelodytes caucasicus and Pelobates syriacus populations were compared qualitatively and quantitively by means of polyacrylamide disc electrophoresis and densitometry methods. It was determined that the blood serum proteins of both populations demonstrated qualitative and quantitive differences. This result supports the morphological and osteological studies emphasizing the fact that the genus Pelodytes needs to be treated as a separate family (Pelodytidae).

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Redescription Of Diacyclops Alticola Kiefer, 1935 (Copepoda, Cyclopoida) From The Pamirs (Tajikistan), Iskandar Mirabdullayev, Nazira Rustamova Jan 2007

Redescription Of Diacyclops Alticola Kiefer, 1935 (Copepoda, Cyclopoida) From The Pamirs (Tajikistan), Iskandar Mirabdullayev, Nazira Rustamova

Turkish Journal of Zoology

Diacyclops alticola, a poorly known cyclopoid, is redescribed on specimens from a shallow pool near Lake Rang-Kul in the Pamirs (Tajikistan) at an altitude of 3700 m. Synonymy of D. alticola Kiefer, 1935 and D. longifurcus Shen et Sung, 1963 is proposed. A key to the species of the genus Diacyclops Kiefer, 1927 in Central Asia is presented.

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A Preliminary Study On Growth Parameters And Mortality Rates Of The Barbel (Barbus Tauricus Escherichi Steindachner, 1897) In Yeşildere Stream, Rize, Turkey, Cemaletti̇n Şahi̇n, Hasan Oğuz İmamoğlu, Davut Turan, Bülent Verep, Vatan Taşkin Jan 2007

A Preliminary Study On Growth Parameters And Mortality Rates Of The Barbel (Barbus Tauricus Escherichi Steindachner, 1897) In Yeşildere Stream, Rize, Turkey, Cemaletti̇n Şahi̇n, Hasan Oğuz İmamoğlu, Davut Turan, Bülent Verep, Vatan Taşkin

Turkish Journal of Zoology

Growth parameters and mortality rates of the Barbus tauricus escherichi population inhabiting in Yeşildere Stream were investigated. In particular, age and size distributions, asymptotic growth, and mortality rates by age group classes were estimated. A total of 304 B. t. escherichi specimens were sampled between June 2001 and July 2002. The population consisted of 5 age classes (i.e. 0 to IV) with minimum and maximum sizes of 5 cm to 23 cm in total length. The mean growth parameters were determined as L_{infinity} = 26.63 cm, K = 0.274, and t_0 = -1.009 with the scale method and as L_{infinity} …

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Maturity And Fecundity Of Spiny Dogfish (Squalus Acanthias L., 1758) In The Eastern Black Sea, Sefa Ayhan Demi̇rhan, Kadi̇r Seyhan Jan 2007

Maturity And Fecundity Of Spiny Dogfish (Squalus Acanthias L., 1758) In The Eastern Black Sea, Sefa Ayhan Demi̇rhan, Kadi̇r Seyhan

Turkish Journal of Zoology

The maturity and fecundity of Squalus acanthias spiny dogfish sampled from the south-eastern Black Sea were studied. Age and length at 50% maturity were 10.49 years and 87.57 cm for males, and 11.99 years and 102.97 cm for females, respectively. Mean biennial fecundity was 19.4 eggs and 12.9 pups. A linear relationship between fecundities and length was found: F_e = 0.09 x TLp + 2.12 (r = 0.5) for pups and F_o = 0.27 x TLp - 21.59 (r = 0.7) for eggs.

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The Morphology, Taxonomy, And Distribution Of Specimens Of Darevskia Clarkorum (Sauria: Lacertidae: Darevskia) Collected From Turkey’S Eastern Black Sea Region, Çeti̇n Ilgaz Jan 2007

The Morphology, Taxonomy, And Distribution Of Specimens Of Darevskia Clarkorum (Sauria: Lacertidae: Darevskia) Collected From Turkey’S Eastern Black Sea Region, Çeti̇n Ilgaz

Turkish Journal of Zoology

In all, 103 specimens of Clark's lizard, Darevskia clarkorum (Darevsky and Vedmederja, 1977), from 6 localities in the eastern Black Sea region of Turkey were examined in terms of pholidosis characteristics, morphometric measurements, and color and pattern features. Kolmogorov-Smirnov testing across all populations verified sexual dimorphism in the Ortacalar and Hemşin populations, regarding transversal series of ventral plates (P < 0.05). According to the Mann-Whitney U test, 16 pholidosis characteristics showed differences among the populations (P < 0.05). For comparison of morphometric measurements, 4 morphometric indices and ratios were developed. According to the results of independent t-testing, no differences were found between males and females among the populations. One-way variance analyses based on 4 morphometric indices and ratios confirmed that head index, snout-vent length/tail length, and tail length/total body length showed differences among the populations (P < 0.05). Regarding pholidosis characteristics (except rates of the presence of a masseteric plate and contact between the rostral and internasal plate), morphometric measurements, and color and pattern features, the specimens collected from 6 different localities were similar to D. clarkorum specimens mentioned in the literature. Furthermore, the known range of the species in Turkey has been extended.

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Zooplankton Fauna And Seasonal Changes Of Gelingüllü Dam Lake (Yozgat, Turkey), Murat Kaya, Ahmet Altindağ Jan 2007

Zooplankton Fauna And Seasonal Changes Of Gelingüllü Dam Lake (Yozgat, Turkey), Murat Kaya, Ahmet Altindağ

Turkish Journal of Zoology

Seasonal variation and density of the zooplankton fauna were studied in Gelingüllü Dam Lake from July 2004 to June 2005. Samples were collected from 4 different stations on a monthly basis with a plankton net, both horizontally and vertically. The zooplankton sample consisted of 92% Rotifera, 7% Cladocera, and 1% Copepoda, including 54, 9, and 2 taxa, respectively. Rotifera were the dominant group of zooplankton with respect to species numbers, count, and density (I/m^3).

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Nest Reuse By Eastern Kingbirds: Adaptive Behavior Or Ecological Constraint?, Lucas J. Redmond, Michael T. Murphy, Amy C. Dolan Jan 2007

Nest Reuse By Eastern Kingbirds: Adaptive Behavior Or Ecological Constraint?, Lucas J. Redmond, Michael T. Murphy, Amy C. Dolan

Biology Faculty Publications and Presentations

The reuse of old nests by open-cup nesting passerines is a seemingly rare but potentially adaptive behavior if, as a consequence, females begin to breed earlier, lay larger clutches, or fledge more young. We report an unusually high rate of nest reuse (~10% of 341 nests) for Eastern Kingbirds (Tyrannus tyrannus) breeding at Malheur National Wildlife Refuge, Oregon. We found no difference in availability of nesting habitat or food abundance in territories in which nests were and were not reused. We also found no support for the hypotheses that kingbirds benefited from nest reuse by breeding earlier, laying …

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Cow Condition And Reproductive Performance, Julie Walker, George Perry Jan 2007

Cow Condition And Reproductive Performance, Julie Walker, George Perry

Animal Science Faculty Publications

It has been understood for decades that reproductive performance is the most important factor affecting production efficiency of a cow-calf enterprise. To maintain a yearly calving interval (one calf every 365 days), a cow must re-breed in 80 to 85 days after calving. With the nutrient priority of beef cattle being body maintenance, growth, lactation, fetal growth, breeding, and body reserve according to Short et al. (1990) indicates that reproduction is low on the list. Body condition score at parturition has been implicated as the single most important factor affecting postpartum interval to estrus and pregnancy in multiparous cows.

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Relationship Of Plasma Ghrelin Concentrations With End-Products Of Carbohydrate Fermentation For Beef Cattle During A Feeding Interval, Aimee Wertz-Lutz, Jay Daniel, Jeff Clapper, Allen Trenkle, Donald Beitz Jan 2007

Relationship Of Plasma Ghrelin Concentrations With End-Products Of Carbohydrate Fermentation For Beef Cattle During A Feeding Interval, Aimee Wertz-Lutz, Jay Daniel, Jeff Clapper, Allen Trenkle, Donald Beitz

South Dakota Beef Report, 2007

Four steers (BW 1281±28.2 lb) were used to determine the relationship of plasma ghrelin concentrations with end-products of carbohydrate fermentation and hormones and metabolites indicative of nutrition status during a 12-h feeding interval. A common high-energy diet was offered at 240% of the intake necessary for BW maintenance (2.4xM) or 80% of the intake necessary for BW maintenance (0.8xM). At initiation of period I, 2 steers were allowed 2.4xM intake, whereas intake for the remaining 2 steers was restricted to 0.8xM. Equal aliquots of feed were offered at 0800 and at 2000 h. On 7, 14, and 21 d following …

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Prolonged, Moderate Nutrient Restriction In Beef Cattle Results In Persistently-Elevated Plasma Ghrelin Concentrations, Aimee Wertz-Lutz, Jay Daniel, Jeff Clapper, Allen Trenkle, Donald Beitz Jan 2007

Prolonged, Moderate Nutrient Restriction In Beef Cattle Results In Persistently-Elevated Plasma Ghrelin Concentrations, Aimee Wertz-Lutz, Jay Daniel, Jeff Clapper, Allen Trenkle, Donald Beitz

South Dakota Beef Report, 2007

Four steers (BW 1281±28.2 kg) were used in a crossover design to determine the effects of prolonged, moderate energy and protein restriction on plasma ghrelin and GH concentrations. A common high-energy diet was offered at 240% of the intake necessary for BW maintenance (2.4xM) or 80% of the intake necessary for BW maintenance (0.8xM). As a common starting point, all steers were adjusted to 2.4xM during a 23-d pre-trial adaptation period. At initiation of period 1, 2 steers remained at 2.4xM, whereas intake for the remaining 2 steers was restricted to 0.8xM. Feed allotments were offered twice daily in equal …

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Influence Of Post-Ai Nutrition On Blood Urea Nitrogen, Progesterone, And Pregnancy, George Perry, Brandi Perry, Josh Nelson, Julie Walker, Cody Wright Jan 2007

Influence Of Post-Ai Nutrition On Blood Urea Nitrogen, Progesterone, And Pregnancy, George Perry, Brandi Perry, Josh Nelson, Julie Walker, Cody Wright

South Dakota Beef Report, 2007

Research has shown that changes in nutrition can have an effect on reproductive performance. Our objective was to determine the effect of post-AI nutrition on BCS, blood urea nitrogen (BUN), progesterone, and pregnancy rates. Forage-developed Angus-cross bred heifers (n = 336) were synchronized with the Select Synch+ Controlled Internal Drug Releasing device (CIDR) protocol (d -7 100 μg GnRH and CIDR; d 0 25 mg PG and removal of CIDR). Estrus was detected for 72 h and heifers bred by AI 12 h after being detected in estrus; heifers not in detected in estrus were bred by AI and given …

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Habitat And Distribution Of The Ruffed Lemur, "Varecia", North Of The Bay Of Antongil In Northeastern Madagascar, Evon R. Hekkala, Marius Rakotondratsima, Natalie Vasey Jan 2007

Habitat And Distribution Of The Ruffed Lemur, "Varecia", North Of The Bay Of Antongil In Northeastern Madagascar, Evon R. Hekkala, Marius Rakotondratsima, Natalie Vasey

Anthropology Faculty Publications and Presentations

Here we present information on the conservation status of ruffed lemurs (Varecia) north of the Bay of Antongil in northeastern Madagascar. Two contiguous protected areas were recently established that traverse this region via blocks of forest connected by narrow forest corridors: the Masoala National Park, which expands further to the east, and the Makira Protected Area, which expands further to the west and northwest. The two extant ruffed lemurs, Varecia variegata and V. rubra, overlapped in this region historically and, on rare occasions, hybridized. As such, land north of the Bay of Antongil is a critical part …

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A Practical Approach To Phylogenomics: The Phylogeny Of Ray-Finned Fish (Actinopterygii) As A Case Study, Chenhong Li, Guillermo Orti, Gong Zhang, Guoqing Lu Jan 2007

A Practical Approach To Phylogenomics: The Phylogeny Of Ray-Finned Fish (Actinopterygii) As A Case Study, Chenhong Li, Guillermo Orti, Gong Zhang, Guoqing Lu

Biology Faculty Publications

Background: Molecular systematics occupies one of the central stages in biology in the genomic era, ushered in by unprecedented progress in DNA technology. The inference of organismal phylogeny is now based on many independent genetic loci, a widely accepted approach to assemble the tree of life. Surprisingly, this approach is hindered by lack of appropriate nuclear gene markers for many taxonomic groups especially at high taxonomic level, partially due to the lack of tools for efficiently developing new phylogenetic makers. We report here a genome-comparison strategy to identifying nuclear gene markers for phylogenetic inference and apply it to the …

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Climate-Induced Forest Dieback As An Emergent Global Phenomenon, Craig Allen, David D. Breshears Jan 2007

Climate-Induced Forest Dieback As An Emergent Global Phenomenon, Craig Allen, David D. Breshears

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

An organized oral session at the annual meeting of the Ecological Society of America in San Jose, Calif., posed this question: Is climate-induced drought stress triggering increasing rates and unusual patterns of forest die-off at a global scale? Twenty-nine researchers representing five continents reported on patterns, mechanisms, and projections of forest mortality.

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Subfamily Phyllostominae Gray, 1825 From Mammals Of South America, Stephen L. Williams, Hugh H. Genoways Jan 2007

Subfamily Phyllostominae Gray, 1825 From Mammals Of South America, Stephen L. Williams, Hugh H. Genoways

University of Nebraska State Museum: Mammalogy Papers

The subfamily Phyllostominae is distributed from the southern United States (Arizona, California, and southern Nevada), southward into northern Argentina, Paraguay, and southern Brazil. South American phyllostomines are primarily restricted to the mainland, but also occur on a few major islands off the coast of South America, such as Margarita Island (Venezuela), Trinidad and Tobago, and the Netherlands Antilles, as well as the Greater and Lesser Antilles. The number of genera and species recognized in the subfamily depends on the taxonomic interpretations of the content of the genera Lophostoma, Micronycteris, Mimon, Phyllostomus, and Tonatia. In near agreement with the …

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Haemato-Biochemical Aspects Of Parturient Haemoglobinuria In Buffalo, Muhammad Zubair Akhtar, Ahrar Khan, Muhammad Zargham Khan, Ghulam Muhammad Jan 2007

Haemato-Biochemical Aspects Of Parturient Haemoglobinuria In Buffalo, Muhammad Zubair Akhtar, Ahrar Khan, Muhammad Zargham Khan, Ghulam Muhammad

Turkish Journal of Veterinary & Animal Sciences

This study aimed to determine the haematological and biochemical changes that occur in buffaloes with parturient haemoglobinuria (PHU). For this purpose, serum samples from 60 PHU-affected and 60 apparently healthy buffaloes were collected and analysed. Mean erythrocyte count (3.6 ± 1.0 10^{12}/l), haemoglobin concentration (5.8 ± 1.4 g/dl), and haematocrit (16.9 ± 2.8 %) of the PHU-affected buffaloes were lower (P < 0.001), while their erythrocyte sedimentation rate (104.1 ± 36.2 mm/h) was higher (P < 0.001) in comparison to the healthy buffaloes. Neutrophils (43.0 ± 4.5%), urea (49.7 ± 7.8 mg/dl) and creatinine (2.1 ± 0.4 mg/dl) concentrations were significantly higher in the PHU-affected buffaloes, while lymphocytes (48.7 ± 2.9%) and erythrocytic glucose-6-phosphate dehydrogenase (G6PD) (92.3 ± 13.2 mU/10^9 TECs) were lower than in the healthy buffaloes. Serum phosphorus (1.9 ± 0.6 mg/dl) and copper (65.4 ± 6.0 \mu g/dl) were lower (P < 0.001), while molybdenum (171.5 ± 56.7 \mu g/dl) was higher in the PHU-affected buffaloes as compared to those values in the healthy buffaloes. It was concluded that PHU-affected buffaloes usually suffer from severe anaemia and hypophosphataemia, and erythrocytes with significantly reduced G6PD are prone to haemolysis, leading to haemoglobinuria in buffaloes.

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Immunohistochemical Diagnosis Of Aspergillosis In Adult Turkeys, Enver Beytut Jan 2007

Immunohistochemical Diagnosis Of Aspergillosis In Adult Turkeys, Enver Beytut

Turkish Journal of Veterinary & Animal Sciences

The aim of the present study was to apply immunohistochemistry, using a commercially available monoclonal antibody, for the diagnosis of aspergillosis in adult turkeys. Eight adult turkeys were studied. The lungs revealed grossly a few yellowish-white granulomas. Histopathologically, the granulomas were distributed in the pulmonary parenchyma or occasionally located around the airways. A few fungal hyphae were detected within the necrotic debris of the granulomas in the lungs using routine fungal stains. Immunohistochemical staining performed on lung sections from all of the turkeys disclosed fungal hyphae and their fragments clearly within the necrotic debris and within the cytoplasm of macrophages …

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Influence Of Bovine Somatotropin And Replacement Of Corn Dextrose With Concentrate On The Performance Of Mid-Lactating Buffaloes Fed Urea-Treated Wheat Straw, Muhammad Sarwar, Muhammad Asif Shahzad, Mahr-Un Nisa, Aboubakar Sufyan Jan 2007

Influence Of Bovine Somatotropin And Replacement Of Corn Dextrose With Concentrate On The Performance Of Mid-Lactating Buffaloes Fed Urea-Treated Wheat Straw, Muhammad Sarwar, Muhammad Asif Shahzad, Mahr-Un Nisa, Aboubakar Sufyan

Turkish Journal of Veterinary & Animal Sciences

The study examined the effect of bovine somatotropin (bST) in mid-lactating Nili-Ravi buffaloes (n = 18) given varying levels of Enzose (corn dextrose) in a urea-treated wheat straw (UTWS) based ration on nutrient intake, digestibility, nitrogen (N) utilisation, milk yield, and its composition in a completely randomised design with a 2 x 3 factorial arrangement. The control ration contained 60% UTWS and 40% concentrate. The other 2 rations were formulated to replace 50% or 100% concentrate portions of the ration with Enzose of equivalent energy. Enzose is a liquid derived from the enzymatic conversion of corn starch to dextrose, and …

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Modelling The Protein And Amino Acid Requirements Of The Greater Rhea (Rhea Americana), James Sales Jan 2007

Modelling The Protein And Amino Acid Requirements Of The Greater Rhea (Rhea Americana), James Sales

Turkish Journal of Veterinary & Animal Sciences

Protein and amino acid requirements of the Greater rhea (Rhea americana) have been estimated from growth data available for this species, and assumptions derived with other closely related species. Differences in body weight and growth pattern caused considerable higher protein and amino acid requirements for males compared to females after 3 months of age. Whereas the absolute protein requirement is comparable between males (148 g/day) and females (144.5 g/day) at 50 days of age, 21.8 g/day protein is needed by males at 500 days of age compared to 12.2 g/day for females. Limitations include the lack of knowledge on feed …

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2007 South Dakota Beef Report, Department Of Animal And Range Sciences, South Dakota State University, Agricultural Experiment Station, South Dakota State University, Cooperative Extension Service, South Dakota State University Jan 2007

2007 South Dakota Beef Report, Department Of Animal And Range Sciences, South Dakota State University, Agricultural Experiment Station, South Dakota State University, Cooperative Extension Service, South Dakota State University

South Dakota Beef Report, 2007

This is the 2007 South Dakota Beef Report. The articles published in this report summarize many of the beef cattle research activities conducted at South Dakota State University during 2007. The articles in this report have many levels of application. Some information has immediate application for your farm, ranch, or agribusiness. The articles include information on nutrition, feed management, reproductive management, health, growth and development, and economics of the cattle and beef industry in South Dakota.

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Plasma Ghrelin Concentrations Of Beef Cattle Consuming A Similar Amount Of Dietary Energy Supplied By Different Ingredients, Aimee Wertz-Lutz, Jeff Clapper, Jenny Thurlow, Donald Beitz, Allen Trenkle Jan 2007

Plasma Ghrelin Concentrations Of Beef Cattle Consuming A Similar Amount Of Dietary Energy Supplied By Different Ingredients, Aimee Wertz-Lutz, Jeff Clapper, Jenny Thurlow, Donald Beitz, Allen Trenkle

South Dakota Beef Report, 2007

Previous research demonstrated that restricting nutrient intake by decreasing DMI of a high-grain diet increased plasma ghrelin concentrations. Objectives of this experiment were to determine 1) whether dietary ingredient composition influenced plasma ghrelin concentrations when energy intake was similar, and 2) whether relationships existed between plasma ghrelin concentrations and plasma insulin, NEFA, and GH concentrations or end-products of carbohydrate fermentation in the rumen. Five steers (1290 ± 39.9 lb) were used in a crossover design with dietary treatments of 50% hay-50% concentrate (HAY) offered at an amount that would meet the steer’s NEm requirement plus supply an additional 3.5 Mcal …

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Effects Of Increasing The Dietary Energy Density By Replacing Grass Hay With Soybean Hulls And Dried Distillers Grains With Solubles On Nutrient Digestibility And Rumen Fermentation, Aimee Wertz-Lutz, Robert Zelinsky, Jeffrey Held Jan 2007

Effects Of Increasing The Dietary Energy Density By Replacing Grass Hay With Soybean Hulls And Dried Distillers Grains With Solubles On Nutrient Digestibility And Rumen Fermentation, Aimee Wertz-Lutz, Robert Zelinsky, Jeffrey Held

South Dakota Sheep Research Reports, 2006-07

We hypothesize that soybean hulls (SH) and dried distillers grains with solubles (DDGS) can be used in lamb diets to increase dietary energy density compared with a traditional grass hay (GH) and soybean meal (SBM) diet without causing adverse effects on nutrient digestibility and rumen function. To test this hypothesis, four ruminally-cannulated wethers were used in a 4x4 Latin square design to determine the effects of replacing GH with SH and replacing SBM with DDGS on nutrient digestibility and rumen fermentation. All diets were formulated to contain 60% roughage and 40% concentrate on DM basis. Dietary roughage source, however, varied …

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Letter From The Dean, Gregory J. Weidemann Jan 2007

Letter From The Dean, Gregory J. Weidemann

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

No abstract provided.

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Discovery: The Student Journal Of Dale Bumpers College Of Agricultural, Food And Life Sciences - Volume 8 2007, Several Authors Jan 2007

Discovery: The Student Journal Of Dale Bumpers College Of Agricultural, Food And Life Sciences - Volume 8 2007, Several Authors

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

No abstract provided.

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