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1999

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Articles 541 - 570 of 658

Full-Text Articles in Animal Sciences

Effects Of Shell Thickness, Shell Pores And Egg Weight Loss On Hatchability On Japanese Quail Eggs, S. Kudret Saylam, Musa Sarica Jan 1999

Effects Of Shell Thickness, Shell Pores And Egg Weight Loss On Hatchability On Japanese Quail Eggs, S. Kudret Saylam, Musa Sarica

Turkish Journal of Veterinary & Animal Sciences

This study was conducted to determine the effects of eggshell thickness, pores, and weight loss on hatchability on Japanese quail eggs. A total of 477 eggs, collected within 5 days, placed in an incubator after determining individual egg weights, and eggs were individually weighted on 5, 10, 14, and 18th days of incubation. Percentage egg weight loss was calculated for individual eggs for each incubation interval. On day 18 of incubation, all unhatched eggs were opened and examined macroscopically for evidence of stage of embryonic development. Egg types were classified as infertile (INF), early dead (ED), late dead (LD), embryos …

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Relationships Between Milk Yield Traits And Milk Protein Polymorphism In Brown Swiss Cattle In Turkey, Mahmut Doğan, Ali̇ Kaygisiz Jan 1999

Relationships Between Milk Yield Traits And Milk Protein Polymorphism In Brown Swiss Cattle In Turkey, Mahmut Doğan, Ali̇ Kaygisiz

Turkish Journal of Veterinary & Animal Sciences

In this study, effects of milk protein polymorphism on milk yield traits were investigaed in Brown Swiss cattle. Starch Gel Elektroforesis methods were used for milk protein typing. The data were evaluated by Least squares and Maximum Likelihood Computer Program. Least squares means were found to be 4029.46±251.73 kg for 305 days milk yield, 301.41±14.84 days for lactation length. Effects of \alpha-s_1-cazein, \beta-Lactoglobulin and \kappa-cazein types on milk yield traits were non-significant (p>0.05), while efect of \beta-Casein types were significant (p

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Milk Protein Polymorphism In The Population Of Brown Swiss Cattel In Türkiye, Mahmut Doğan, Muzaffer Üstdal, Mehmet Demi̇rci̇ Jan 1999

Milk Protein Polymorphism In The Population Of Brown Swiss Cattel In Türkiye, Mahmut Doğan, Muzaffer Üstdal, Mehmet Demi̇rci̇

Turkish Journal of Veterinary & Animal Sciences

In this study, the gene frequencies of \alpha-s_1-casein, \beta-casein, \beta-lactoglobulin and \kappa-casein types were determined in the Brown Swiss cattle which were raised in Türkiye. The frequencies of \alpha-s_1-casein were determined as 0.941 and 0.059 for \alpha-s_1-Ka^B and \alpha-s_1-Ka^C, respectively. Differencies between empricla and theoretical distributions for \alpha-s_1-casein genotypes were non-significant. The frequencies of \beta-casein, were determined as 0.856, 0.134 and 0.009 for \beta-Ka^A, \beta-Ka^B and \beta-Ka^C respectively. Differencies between emprical and theoretical distributions for \beta-casein genotypes were non-significant. The frequencies of \beta-lactoglobulin, were determined as 0.497 and 0.503 for \beta-lgn^A and \beta-lgn^B, respectively. Differencies between emprical and theoretical distributions …

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Investigation Of The Microbial Flora Of Pastırma Marketing In Ankara, Haydar Özdemi̇r, Ufuk Tansel Şi̇reli̇, Belgi̇n Sarimehmetoğlu, Gökhan İnat Jan 1999

Investigation Of The Microbial Flora Of Pastırma Marketing In Ankara, Haydar Özdemi̇r, Ufuk Tansel Şi̇reli̇, Belgi̇n Sarimehmetoğlu, Gökhan İnat

Turkish Journal of Veterinary & Animal Sciences

This study was undertaken to investigation of microbial flora of pastırma, marketing in Ankara. For this purpose, a total of 80 pastırma samples, obtained from different markets, were analysed for microbiological aspect. Also, pH and water activity (aw) values were determined as a parallel to the microbiological analysis. In the frame of the analysis founds, the microbiological values were determined as fallows; The levels of total viable mesophilic count and lactobacilli 10^4-10^8 cfu/g, micrococci/staphylococci 10^4-10^7 cfu/g, enterobacteriaceae

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Effectiveness Of Prostaglandin F_2 Alpha Controlled Inseminations After Rapid Progesterone Test Applications In The Dairy Cows, M. Rifat Salmanoğlu, Erol Alaçam, Mustafa Çelebi̇, Ahmet Baş Jan 1999

Effectiveness Of Prostaglandin F_2 Alpha Controlled Inseminations After Rapid Progesterone Test Applications In The Dairy Cows, M. Rifat Salmanoğlu, Erol Alaçam, Mustafa Çelebi̇, Ahmet Baş

Turkish Journal of Veterinary & Animal Sciences

The aim of this study was; timing of prostaglandin F_2 alpha (PG) injections for the controlled inseminations in cows by rapid progesterone test (RPT) within post calving 50-60 days, pregnancy determination on post breeding 21st days by RPT and fertility comparisons ofthe PG treatment and spontan estrous groups during the trial. Total 60 Holstein cows, between 3-10 ages, randomly sampled from Polatlı and Bala official farms (TİGEM) were included in this study. The cows starting from post calving 50.60th days were divided into 3 groups, each having 20 cows. The cows having spontan estrouses were inseminated after the RPT controls …

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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 Jan 1999

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 …

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The Type Fixing Of Türkgeldi Sheep Herd, Muhi̇tti̇n Özder, M. İhsan Soysal, Mustafa Kaymakçi, Ercan Kizilay, Reşi̇t Sönmez Jan 1999

The Type Fixing Of Türkgeldi Sheep Herd, Muhi̇tti̇n Özder, M. İhsan Soysal, Mustafa Kaymakçi, Ercan Kizilay, Reşi̇t Sönmez

Turkish Journal of Veterinary & Animal Sciences

This study was conducted from the data of 3 years' research which was carried out at the Türkgeldi State Farm in 1993-1995. 1514 Türkgeldi prototype B_1 of Tahirova x Kıvırcık sheep including mature and young animals were used as the subjects of the study. Fecundity, litter size and viability rates were found to be 1.39; 1.52 and 95 % respectively. Birth weights, weaning weigths and weights at 120 days in the base and elite flocks were 3.53 and 3.65 kg; 19.73 and 20.87 kg; 27.46 and 29.18 kg respectively. Heritabilities of birth weight, weaning weight and weights at 120 days …

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Bacteriologic, Serologic And Pathologic Studies On Abortus Cases Of Goats And Sheep In Elazığ And It's Vicinity, Adi̇le Muz, Harun Özer, Hati̇ce Eröksüz, Hasan Basri̇ Ertaş, Hasan Öngör, Hasan Basri̇ Gülcü, Murat Dabak, Orhan Başbuğ, Hakan Kalender Jan 1999

Bacteriologic, Serologic And Pathologic Studies On Abortus Cases Of Goats And Sheep In Elazığ And It's Vicinity, Adi̇le Muz, Harun Özer, Hati̇ce Eröksüz, Hasan Basri̇ Ertaş, Hasan Öngör, Hasan Basri̇ Gülcü, Murat Dabak, Orhan Başbuğ, Hakan Kalender

Turkish Journal of Veterinary & Animal Sciences

In this study, the etiology of ovine and caprine abortions was investigated bacteriologically, serologically and pathologically. Tissue samples collected from aborted sheep and goats in Elazığ and its borders were examined bacteriologically and pathologically for brucellosis, campylobacteriosis, salmonellosis and listeriosis. In addition, blood samples collected from aborted sheep and goats were examined by serological tests for the presence of antibodies to these bacteria. Of 110 aborted fetuses, in 22 (20%) Brucella melitensis, in 5 (4.5%) Campylobacter fetus subsp. fetus, in 4 (3.6%) Salmonella abortus ovis, in 1 (0.9%) Listeria monocytogenes and in 3 (2.7%) E. coli were isolated and identified. …

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The Histological And Histochemical Properties Of The Mast Cells And The Mast Cell Heterogeneity In The Cow Uterus, Ülker Eren, Reşat N. Aşti, Nevi̇n Kurtdere, Mustafa Sandikçi, Emrah Sur Jan 1999

The Histological And Histochemical Properties Of The Mast Cells And The Mast Cell Heterogeneity In The Cow Uterus, Ülker Eren, Reşat N. Aşti, Nevi̇n Kurtdere, Mustafa Sandikçi, Emrah Sur

Turkish Journal of Veterinary & Animal Sciences

The aim of this study was to identify the mast cell heterogeneity of the cow uterus. For this purpose, the histological and histochemical properties and the distribution of the mast cells in cow uterus were investigated. Furthermore, the effects of different fixatives on mast cells were also examined. The study material was obtained from a local slaughterhouse. A total of 20 Holstein cows uteri were used; ten of which were at estrus and the other ten at diestrus phases of sexual cycle. Tissue samples from each cornu uteri were placed in 10 % neutral buffered formalin (NBF) and isotonic formaldehyde …

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The Phenotypic Correlations Between Changes In Fattening And Carcass Characteristics Of Sxblxm Crossbred Lambs, Turgay Taşkin, Muhi̇tti̇n Özder, Hülya Atil, Mustafa Kaymakçi Jan 1999

The Phenotypic Correlations Between Changes In Fattening And Carcass Characteristics Of Sxblxm Crossbred Lambs, Turgay Taşkin, Muhi̇tti̇n Özder, Hülya Atil, Mustafa Kaymakçi

Turkish Journal of Veterinary & Animal Sciences

This research was carried out to determine the relationships between the fattening and carcass characteristics of 40 weaned 35±5 day-old SxBLxM crossbred lambs. Significant relationships between initial body weight of fattening, daily intake and daily gain were found. Positive relationships were found between body weight and rump width, and body length and chest width. Moreover, there was a significant relationship between the hot and cold carcass weight and the meat and fat. In addition, a of the carcass. No significant relationship was found between the bone and the other characteristics.

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Quality Changes In Salted Anchovy (Engraulis Encrasicolus) Produced Using Three Different Salt Concentrations, Aydin Yapar Jan 1999

Quality Changes In Salted Anchovy (Engraulis Encrasicolus) Produced Using Three Different Salt Concentrations, Aydin Yapar

Turkish Journal of Veterinary & Animal Sciences

The quality properties of salted anchovy (Engraulis encrasicolus) produced using 7.5 %, 10 % and 15 % salt were in relation to time. The pH, salt penetration into the tissue, and malonaldehyde content, determined in terms of the 2-thiobarbituric acid (TBA) number and trimethylamine-nitrogen (TMA-N) value, which are quality indicators, were used as the quality characteristics. In the fresh samples, the pH, TBA number and TMA-N value were 6.22, 0.57 mg malonaldchyde/kg and 0.87 mg/100g respectively. During the storage periods, in the group in which 7.5 % salt was applied, the pH, salt penetration into the tissue, TBA number and …

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The Changes Of Metabolic Profile In Dairy Cows During Dry Period And After, Mutlu Sevi̇nç, Abdullah Başoğlu, Fati̇h Bi̇rdane, Mürsel Gökçen, Mahmut Küçükfindik Jan 1999

The Changes Of Metabolic Profile In Dairy Cows During Dry Period And After, Mutlu Sevi̇nç, Abdullah Başoğlu, Fati̇h Bi̇rdane, Mürsel Gökçen, Mahmut Küçükfindik

Turkish Journal of Veterinary & Animal Sciences

In this study, the concentrations of 15 clinic-chemical parameters, viz. total protein, albumin, glucose, insulin, creatinin, total and direct bilirubin, AST, ALT, ALK-P, CPK, GGT, calcium, inorganic phosphorus and magnesium were analysed from the seventh month of pregnancy to the second month of lactation in 13 Holstein cows. Highly significant (p

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The Functional Expression Of Drying On Dried Trout (Oncorhynchus Mykiss W., 1792) By Using Different Temperature And Salt Concentration, Aydin Yapar, Muammer Erdöl Jan 1999

The Functional Expression Of Drying On Dried Trout (Oncorhynchus Mykiss W., 1792) By Using Different Temperature And Salt Concentration, Aydin Yapar, Muammer Erdöl

Turkish Journal of Veterinary & Animal Sciences

In this study, drying functions depend on temperature- time on dried trout (Oncorhynchus mykiss W.,1792) fillets by using four different temperatures and three different salt concentrations were investigated. 25% moisture for drying were accepted . For drying process was used a mechanical dryer. According to the results, drying times were 35 h. on unsalted group , 73 h. on 5% salt group and 105 h. on 10% salt group at 35 ºC; 28 h. on unsalted group, 41 h. on 5% salt group, 41 h. on 10% salt group at 45 ºC ; 14 h. on unsalted group , 18 …

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Possibilities Of Utilizing First Carbonation Sludge From The Sugar Industry As A Calcium Source In Layer Diets, Güray Erener, B. Zehra Sariçi̇çek Jan 1999

Possibilities Of Utilizing First Carbonation Sludge From The Sugar Industry As A Calcium Source In Layer Diets, Güray Erener, B. Zehra Sariçi̇çek

Turkish Journal of Veterinary & Animal Sciences

This study was carried out to investigate the possible use of first carbonation sludge from the sugar industry in layer diets. 324 Babcock B-300 hens were used. Ground marble was replaced in the experimental diets by the sludge to provide the calcium requirements at the rates of 0, 20, 40, 60, 80 and 100%, respectively. Statistical analysis showed that there were significant differences between percentages (P0.05). The result of this study suggest that first carbonation sludge from the sugar industry could replace ground marble and the level of replacement should be 20% if the sludge is used in the layer …

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The Importance Of \Omega-3 Series Fatty Acids In Marine Fish Larvae Nutrition And Recent Developments, Abdurrahman Polat, Gülsün Özyurt Jan 1999

The Importance Of \Omega-3 Series Fatty Acids In Marine Fish Larvae Nutrition And Recent Developments, Abdurrahman Polat, Gülsün Özyurt

Turkish Journal of Veterinary & Animal Sciences

In general, marine fish larvae require \omega-3 HUFA, especially eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Larval growth, survival and larval activity are affected by dietary levels of essantial fatty acids. Some pathological signs, such as abnormal pigmentation, hydrops etc. and low feed conversion efficiency, poor growth, mass mortality are related to \omega-3 HUFA series fatty acids deficiency in larvae food. EPA/DHA ratio in live foods or microencapsuled diets is an important factor in larval development and survival.

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Gsh-Px, G6pd And Arginase Activities And Some Biochemical Parameters In Cattle Infected With Theileria Annuluta, Sema Temi̇zer Ozan, Edi̇p Özer, Sema Yaralioğlu Gürgöze, Seval Yilmaz, Cem Ecmel Şaki̇, Murat Sevgi̇li̇ Jan 1999

Gsh-Px, G6pd And Arginase Activities And Some Biochemical Parameters In Cattle Infected With Theileria Annuluta, Sema Temi̇zer Ozan, Edi̇p Özer, Sema Yaralioğlu Gürgöze, Seval Yilmaz, Cem Ecmel Şaki̇, Murat Sevgi̇li̇

Turkish Journal of Veterinary & Animal Sciences

Theileria annuluta, for which Hyalomma tick species serve as intermediate host, causes an economically important disease in cattle 15 cattle infected with T.annulata and 15 healthy cattle were used in the study. The activities of glutathione peroxidase (GSH-Px), glucose 6 phosphate dehydrogenase (G6PD) and arginase that play role in the free radical metabolism in erythrocytes, and serum aspartate transaminase (AST), alanine transaminase (ALT), total billirubin, cholesterol trigliserid, total protein, albumin, urea, uric acid, haemoglobin, haematocrit levels were measured. Erythrocyte GSH-Px and G6PD activities were measured by beutler, arginase activitiy by the modified TDMU method and other serum parameters were evaluated …

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Morphological Characters Of Some Important Races And Ecotypes Of Turkish Honeybees (Apis Mellifera L.)-I, Ahmet Güler, Osman Kaftanoğlu Jan 1999

Morphological Characters Of Some Important Races And Ecotypes Of Turkish Honeybees (Apis Mellifera L.)-I, Ahmet Güler, Osman Kaftanoğlu

Turkish Journal of Veterinary & Animal Sciences

This study was conducted to determine the morphological characters of some important honeybee (A. Mellifera L.) races and ecotypes in Turkey. Experimental samples were collected from 6 different regions such as Central Anatolia Region (Beypazarı), North Eastern Anatolia Region (Posof), Marmara Region (Gökçeada), Thrace Region (Saray), Aegean Region (Fethiye) and Mediterranean Region (Erdemli). Although 41 morphological characters were measured, twenty one morphological characters such as lenght of cover hair on tergite 5, width of tomentum on tergite 4, width of stripe posterior of tomentum, index of tomentum, length of proboscis, length of femur, length of tibia, matatersus width, length of …

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Determination Of Performances Some Important Races And Ecotypes Of Turkish Honeybees (Apis Mellifera L.) Under Migratory Beekeeping Conditions, Ahmet Güler, Osman Kaftanoğlu Jan 1999

Determination Of Performances Some Important Races And Ecotypes Of Turkish Honeybees (Apis Mellifera L.) Under Migratory Beekeeping Conditions, Ahmet Güler, Osman Kaftanoğlu

Turkish Journal of Veterinary & Animal Sciences

This study was conducted to compare performances of some important honeybee (A. mellifera L.) races and ecotypes in Turkey. Experimental colonies were collected from 6 different regions such as Central Anatolia Region (Beypazary), North Eastern Anatolia Region (Posof), Marmara Region (Gökçeada); Thrace Region (Saray), Aegean Region (Fethiye) and Mediterranean Region (Erdemli). Genotypes were compared with respect to some physiological characteristics including honey yield, wax building activity, development of colony population and brood rearing activity. During 2 years of experiment the Muğla genotype was superior to the other genotypes in terms of development of colony population, brood rearing activity, wax building …

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Investigation On Serum Ca And P Levels In Cows With Retained Placenta, Hali̇s Öcal, Yusuf Türköz, Hayretti̇n Çeti̇n, Erdal Kaygusuzoğlu, Ali̇ Ri̇şvanli, Cahi̇t Kalkan Jan 1999

Investigation On Serum Ca And P Levels In Cows With Retained Placenta, Hali̇s Öcal, Yusuf Türköz, Hayretti̇n Çeti̇n, Erdal Kaygusuzoğlu, Ali̇ Ri̇şvanli, Cahi̇t Kalkan

Turkish Journal of Veterinary & Animal Sciences

This study was carried out to investigate serum Ca and P levels in 31 cows with retained placenta (RP) and 8 cows without RP (control group). The RP was observed following normal parturition in 21 cows (RPP), and the remaining 10 cows had RP after abortion (RPA). Serum Ca and P levels did not differ significantly between the cows with RP and the control group (p>0.05). When the cows with RP were subdivided into two groups as the cows with RPP and those with RPA; the difference in the levels of P between these groups and the control group …

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Pathomorphologic And Biochemical Studies On Experimental Sodium Toxication In Broilers, Hati̇ce Eröksüz Jan 1999

Pathomorphologic And Biochemical Studies On Experimental Sodium Toxication In Broilers, Hati̇ce Eröksüz

Turkish Journal of Veterinary & Animal Sciences

Pathomorphological and biochemical findings related to experimental sodium toxication were studied. Sixty male chicks were divided into five different groups. Sodium bicarbonate (group-1 and 2) and sodium chloride (group-3 and 4) were added into tap water at 6 and 12 g/l doses, respectively. The chicks in all groups were fed on standart chick and standart broiler ration. Cardiac enlargement and various degree of visceral uricosis were the main macroscopic lesions detected in group-1 and group-2. In group-3 and 4, such macroscopic lesions cardiac enlargement, testicular edema, hemorrhagic gastritis as were detected. Microscopic examinations showed the lesions related to macroscopic ones. …

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Determination Of Seroprevalence Of Leptospirosis In Cattle In Elazığ, Burhan Çeti̇nkaya, Hasan Basri̇ Ertaş, Adi̇le Muz, Hasan Öngör, Hakan Kalender, Vi̇ldan Özdemi̇r Jan 1999

Determination Of Seroprevalence Of Leptospirosis In Cattle In Elazığ, Burhan Çeti̇nkaya, Hasan Basri̇ Ertaş, Adi̇le Muz, Hasan Öngör, Hakan Kalender, Vi̇ldan Özdemi̇r

Turkish Journal of Veterinary & Animal Sciences

Serum samples collected from randomly-selected 395 cattle between June-November 1997 from the districts and central villages of Elazığ were used to determine the seroprevalence of Leptospirosis in cattle. Microscopic Agglutination Test (MAT) was used to examine serum samples for antibodies to L. hardjo, L. grippotyphosa, L. pomona and L. icterohaemorrhagiae. Positive results were obtained from eight (2.03%) samples; seven (1.77%) of which were agglutinated with L. hardjo and one (0.25%) with L. grippotyphosa antigens. There was a statistically significant difference when the seropositivity rates were compared in different districts (p=0.002). Age and sex were not determined to affect the frequency …

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Proceedings Of The Symposium On The Status, Management, And Conservation Of The Species Alectoris, Black Francolin, Thrush, Quail, And Turtle Dove In The Mediterranean Region, Nicos Kassinis, Panicos Panayides Jan 1999

Proceedings Of The Symposium On The Status, Management, And Conservation Of The Species Alectoris, Black Francolin, Thrush, Quail, And Turtle Dove In The Mediterranean Region, Nicos Kassinis, Panicos Panayides

Galliformes Specialist Group and Affiliated Societies: Reports and Other Materials

Proceedings of the International Council for Game and Wildlife Conservation, Symposium on the Status, Management, and Conservation of the Species Alectoris, Black Francolin, Thrush, Quail, and Turtle Dove in the Mediterranean Region held Octobe 8-10, 1999 in Lemesos, Cyprus.

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Modeling The Msx Parasite In Eastern Oyster (Crassostrea Virginica) Populations. Iii. Regional Application And The Problem Of Transmission, Eric N. Powell, John M. Klinck, Susan E. Ford, Eileen E. Hofmann, Stephen J. Jordon Jan 1999

Modeling The Msx Parasite In Eastern Oyster (Crassostrea Virginica) Populations. Iii. Regional Application And The Problem Of Transmission, Eric N. Powell, John M. Klinck, Susan E. Ford, Eileen E. Hofmann, Stephen J. Jordon

CCPO Publications

A model of transmission for Haplosporidium nelsoni, the disease agent for MSX disease, is developed and applied to sites in Delaware Bay and Chesapeake Bay. The environmental factors that force the oyster population- H. nelsoni model are salinity, temperature, food, and total suspended solids. The simulated development of MSX disease was verified using 3 time series of disease prevalence and intensity: 1960 to 1970 and 1980 to 1990 for Delaware Bay, and 1980 to 1994 for Chesapeake Bay, and for a series of sites covering the salinity gradient in each bay. Additional simulations consider the implications of assumptions made …

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Modeling The Msx Parasite In Eastern Oyster (Crassostrea Virginica) Populations. Ii. Salinity Effects, Michelle C. Paraso, Susan E. Ford, Eric N. Powell, Eileen E. Hofmann, John M. Klinck Jan 1999

Modeling The Msx Parasite In Eastern Oyster (Crassostrea Virginica) Populations. Ii. Salinity Effects, Michelle C. Paraso, Susan E. Ford, Eric N. Powell, Eileen E. Hofmann, John M. Klinck

CCPO Publications

An oyster population model coupled with a model for Haplosporidium nelsoni, the causative agent of the oyster disease MSX, was used with salinity time-series constructed from Delaware River flow measurements to study environmentally-induced variations in the annual cycle of this disease in Delaware Bay oyster populations. Model simulations for the lower Bay (high salinity) sire reproduced the annual cycle observed in lower Delaware Bay. Simulations at both upper Bay (low salinity) and lower Bay sites produced prevalences and intensities that were consistent with field observations. At all sites, low freshwater discharge resulted in increased disease levels, whereas high freshwater …

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Growth And Yield-Per-Recruit Modeling Of Spot (Leiostomus Xanthurus) In The Chesapeake Bay, And A Comparison Of Biological Reference Points, Kevin Ray Piner Jan 1999

Growth And Yield-Per-Recruit Modeling Of Spot (Leiostomus Xanthurus) In The Chesapeake Bay, And A Comparison Of Biological Reference Points, Kevin Ray Piner

Biological Sciences Theses & Dissertations

Spot were sampled from the Chesapeake Bay commercial fishery from 1993–1995 to determine if spot are overfished. Transversely sectioned otoliths were determined to be the most appropriate structure for ageing spot. It was determined that spot have a high natural mortality rate (M = 0.9) and fast growth (K = 0.6). This combination of M and K makes spot relatively impervious to growth overfishing as determined by yield-per-recruit modeling. Because spot are nearly impervious to growth overfishing, management thresholds based on yield-per-recruit modeling may be inappropriate. In addition, the combination of high M and fast K makes it possible to …

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Population Dynamics Of The Southern Brown Bandicoot (Isoodon Obesulus) On Ellen Brook Reserve, Craig Pentland Jan 1999

Population Dynamics Of The Southern Brown Bandicoot (Isoodon Obesulus) On Ellen Brook Reserve, Craig Pentland

Theses : Honours

The small, enclosed section of Ellen Brook Reserve provided the unique opportunity to observe a population of southern-brown bandicoots (lsoodon obesulus) in the absence of exotic predators. The reserves small-enclosed size enabled it possible to trap the whole area (excluding the ephemeral swamps) and so emigration and immigration could be excluded. This enabled good population size estimates, and inferences on the loss of individuals due to mortality could be more strongly argued for. An understanding of the population structure, dynamics, size and density, and body condition of I. obesulus in Ellen Brook Reserve, will provide important information, for …

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Myofibrillar Protein Composition Of Regenerating And Pristine Claw Closer Muscles Of The Yabby, Cherax Albidis, Lanelle Cutler Jan 1999

Myofibrillar Protein Composition Of Regenerating And Pristine Claw Closer Muscles Of The Yabby, Cherax Albidis, Lanelle Cutler

Theses : Honours

Yabbies have the ability to regenerate lost limbs. Loss of a limb results in the growth of a limb bud. Development of this new limb involves many developing stages until the new limb becomes morphologically and physiologically virtually indistinguishable from its predecessor. In the yabby, the claw becomes functional after the first moult when the dactyl becomes moveable. However, the muscle fibres are able to develop force and appear to be functioning before the dactyl becomes moveable and the claw is operational (West et al., 1995). This study aimed to document morphological stages of claw regeneration and determine sequence and …

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Genetic Relationships Among Subspecies Of Vigna Unguiculata (L.) Walp. Based On Allozyme Variation, R. S. Pasquet Jan 1999

Genetic Relationships Among Subspecies Of Vigna Unguiculata (L.) Walp. Based On Allozyme Variation, R. S. Pasquet

All Peer-Reviewed Publications

The cowpea [Vigna unguiculata (L.) Walp.] is a morphologically and genetically variable species composed of wild perennial, wild annual, and cultivated forms that are mainly used for edible seeds and pods. In this study, genetic variation in 199 germplasm accessions of wild and cultivated cowpea was evaluated using an allozyme analysis. The results from this survey showed that wild cowpea exhibits genetic variation perfectly fitted with the existing morphological classification. The cowpea gene-pool is characterized by its unusually large size. It encompasses taxa (ranked as subspecies) that could be considered as different species considering the high genetic distances observed between …

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The Effects Of Some Natural And Synthetic Pigment Materials On Egg Yolk Pigmentation Andproduction In White Corn And Wheat Based Diets, Figen Kirkpinar, Ramazan Erkek Jan 1999

The Effects Of Some Natural And Synthetic Pigment Materials On Egg Yolk Pigmentation Andproduction In White Corn And Wheat Based Diets, Figen Kirkpinar, Ramazan Erkek

Turkish Journal of Veterinary & Animal Sciences

The study was carried out to investigate the effect of adding lutein, alfalfa meal, marigold meal, paprika meal, ?-apo-8'-carotenoic acid ethyl ester, canthaxanthin and ?-apo-8'-carotenoic acid ethyl ester+canthaxanthin (3:1) on egg yolk pigmentation and production in white corn and wheat diets. The maximum Roche color fan (RCF) value was found in canthaxanthin and the mixture of ?-apo-8'-carotenoic acid ethyl ester and canthaxantin. The maximum ?-carotene equivalent (BCE) value was found in ?-apo-8'-carotenoic acid ethyl ester. The maximum Hunter L value was found in the control and lutein. The maximum Hunter a value was found in paprika meal. The maximum Hunter …

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A Research On The Use Of Mediterranean Mussel In Feed For Rainbow Trout(Oncorhynchus Mykiss W. 1782), Orhan Aral, Cumaali Ağirağaç, Murat Yi̇ği̇t Jan 1999

A Research On The Use Of Mediterranean Mussel In Feed For Rainbow Trout(Oncorhynchus Mykiss W. 1782), Orhan Aral, Cumaali Ağirağaç, Murat Yi̇ği̇t

Turkish Journal of Veterinary & Animal Sciences

The research has been conducted on the use of mediterranean mussel in feed for rainbow trout reared in sea cages in Black Sea. In the research which was carried out for 39 days in the sea cage unit of the Ondokuz Mayis University Fisheries Faculty of Sinop, 480 rainbow trouts with initial mean weights of 120 g were used. At the end of research, it has been concluded that it is possible to replace mediterranean mussel with certain amount of pellets in the rainbow trout nutrition. According to the prices in 1995, the cost of rainbow trout fed on pellet …

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