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Full-Text Articles in Life Sciences
Population Parameters Of The Pearl Oyster Pinctada Radiata (Leach) In Qatari Waters, Arabian Gulf, Saad Zakaria Mohammed, Mohammed Hamed Yassien
Population Parameters Of The Pearl Oyster Pinctada Radiata (Leach) In Qatari Waters, Arabian Gulf, Saad Zakaria Mohammed, Mohammed Hamed Yassien
Turkish Journal of Zoology
The pearl oyster, Pinctada radiata, represents the most abundant marine bivalve species in Qatari waters. The population parameters of this species were investigated and compared to those obtained previously from both the Mediterranean and Red seas. Four age groups with mean lengths of 56.75, 65.84, 77.54 and 84.66 mm were obtained for P. radiata from Qatari waters. The values of asymptotic length, Brody's growth coefficient and growth performance index were 132.18 mm, 0.34 y^{-1} and 1.77 respectively, while the total mortality coefficient equals 2.47 y^{-1}. The morphometric relationship between the total weight and dorso-ventral measurement was determined to be W …
The Effect Of Age, Sex, Housing System And Pregnancy On Some Blood Parameters Of Tuj Sheep, Ömer Bozdoğan, Meti̇n Çenesi̇z, Mehmet Kaya, Nadi̇de Nabi̇l Kami̇loğlu
The Effect Of Age, Sex, Housing System And Pregnancy On Some Blood Parameters Of Tuj Sheep, Ömer Bozdoğan, Meti̇n Çenesi̇z, Mehmet Kaya, Nadi̇de Nabi̇l Kami̇loğlu
Turkish Journal of Veterinary & Animal Sciences
In this study some blood parameters and the effects of age, sex, housing system and pregnancy of Tuj sheep that have been bred in the Kars region of Turkey were researched and compared. The various blood parameters including the amount of haemoglobin, haematocrit value, erythrocyte and leukocyte count, and the differential percentage of white blood cells were determined from blood taken intravenously. The haemoglobin and erythrocyte values were found to be significantly (p < 0.05) higher in 5-7-month-old Tuj sheep grazing in an open field than in 2-3-month-old male Tuj sheep feeding in a closed system. The erythrocyte count was found to be higher in 2-3-month-old female Tuj sheep in comparison to males. The haemoglobin, leukocyte and haematocrit values were also higher in this group of animals, though this was not statistically significant. The erythrocyte, leukocyte, haemoglobin, haematocrit values and differential percentage of white blood cells were not different in 5-7-month-old male and female Tuj sheep grazing in an open area. The erythrocyte number decreased after parturition in respect to the oestrus and pregnancy period. This decrease was statistically significant. The erythrocyte values were 10.2 x 10^6 /mm^3 before oestrus, 9.5 x 10^6 /mm3 during pregnancy and 8.2 x 10^6 /mm^3 after parturition. The haemoglobin value decreased significantly (p < 0.05) during pregnancy. The leukocyte number was found to be less during pregnancy in comparison to other periods; it was 7.7 ± 1.9 x 10^3 /mm^3 during pregnancy, 9.3 ± 1.9 x 10^3 /mm^3 before oestrus, and 9.7 ± 2.5 x 10^3 /mm^3 after parturation. The lymphocyte percentage increased significantly (p < 0.05) during the pregnancy period.
Age And Growth Characteristics Of Chalcalburnus Mossulensis (Heckel, 1843) Living In Karasu River (Erzurum-Turkey), Ayhan Yildirim, Hali̇l İbrahi̇m Hali̇loğlu, Mustafa Türkmen, Orhan Erdoğan
Age And Growth Characteristics Of Chalcalburnus Mossulensis (Heckel, 1843) Living In Karasu River (Erzurum-Turkey), Ayhan Yildirim, Hali̇l İbrahi̇m Hali̇loğlu, Mustafa Türkmen, Orhan Erdoğan
Turkish Journal of Veterinary & Animal Sciences
The relationship of age, growth and length-weight was analyzed for Chalcalburnus mossulensis from the Aşkale region of Karasu River from November 1995 to October 1997. Fish in the sample groups were between 1 and 7 years and the ratio of males to females was 1:1.08. Von Bertalanffy equations were used to find the growth in length for both sexes. The growth parameters for males and females were estimated to be L_{\infinity} = 19.88869 cm, K = 0.1867795 and t_0 = -2.3 and L_{\infinity} = 21.8742 cm, K = 0.168014 and t_0 = -2.1, respectively. We also found that the length-weight …
Investigation Of Some Population Parameters Of Common Sole, Solea Solea (L., 1758) From İskenderun Bay, Mustafa Türkmen
Investigation Of Some Population Parameters Of Common Sole, Solea Solea (L., 1758) From İskenderun Bay, Mustafa Türkmen
Turkish Journal of Veterinary & Animal Sciences
Data on age, growth, reproduction, mortality and exploitation were examined for common sole collected in İskenderun Bay from March 2000 to February 2001. The examined individuals were aged between 1 and 8 years. Total length ranged from 8.8 to 28.2 cm. The length-weight relationships for males (a = 0.0117, b = 2.998) and females (a = 0.0091, b = 3.077) showed no significant difference from isometric growth. Von Bertalanffy growth parameters were L_{\infty} = 26.03 cm, k = 0.221 year^{-1}, t_o = -1.31 for males and L_{\infty} = 29.95 cm, k = 0.181 year^{-1}, t_o = -1.55 for females. The …
Effect Of Some Environmental Factors On Milk Yield Traits In A Brown Swiss Herd Reared At The Bahri Dağdaş International Agricultural Research Institute, Muammer Ti̇lki̇, Şeref İnal, Mehmet Çolak, M. Emi̇n Teki̇n
Effect Of Some Environmental Factors On Milk Yield Traits In A Brown Swiss Herd Reared At The Bahri Dağdaş International Agricultural Research Institute, Muammer Ti̇lki̇, Şeref İnal, Mehmet Çolak, M. Emi̇n Teki̇n
Turkish Journal of Veterinary & Animal Sciences
This study was carried out to investigate milk yield traits and some environmental factors affecting milk yield traits in Brown Swiss cattle reared at the Bahri Dağdaş International Agricultural Research Institute. Between 1987 and 1998, 730 lactation records obtained from 273 cows were evaluated. The least-squares means of measured milk yield, 305-day milk yield, dry period and lactation duration were 3631 kg, 3332 kg, 97.1 days and 313.8 days, respectively. Both year and age statistically affected (P < 0.01-0.001) milk yield and lactation duration, but the calving season was not affected (P > 0.05). The effect of the year on dry period was also significant (P < 0.01), but the effect of age and calving season were not significant (P > 0.05).
The Effect Of Age On Spermatological Properties In Rainbow Trout (Oncorhynchus Mykiss W., 1792), Necmetti̇n Teki̇n, Selçuk Seçer, Ergun Akçay, Yusuf Bozkurt, Sezer Kayam
The Effect Of Age On Spermatological Properties In Rainbow Trout (Oncorhynchus Mykiss W., 1792), Necmetti̇n Teki̇n, Selçuk Seçer, Ergun Akçay, Yusuf Bozkurt, Sezer Kayam
Turkish Journal of Veterinary & Animal Sciences
At the end of the spawning season, semen was collected without anesthesia by abdominal massage from 37 rainbow trout according to different age groups. In collected semens, color, volume, motility, activity time (duration of motility), concentration, total spermatozoa and pH were recorded. Furthermore, body weight and body length were measured and correlations beetween spermatological properties and these parameters were assessed. In the 1-2 years age group, volume (ml), motility (%), activity time (s), concentration (x 10^9 sp/ml), total spermatozoa (per ejaculate) and pH were 9.7, 81.0, 79.0, 8.97, 87.0 and 7.20 respectively; in the 2-3 years age group, these values …
Investigation Of The Effects Of Age, Sex And Season On Electrocardiographs (Ecg Values) And Heart Radiographs Of Healthy Van Cats, Di̇de Kiliçalp, Ali̇ Çinar
Investigation Of The Effects Of Age, Sex And Season On Electrocardiographs (Ecg Values) And Heart Radiographs Of Healthy Van Cats, Di̇de Kiliçalp, Ali̇ Çinar
Turkish Journal of Veterinary & Animal Sciences
This study was carried out to investigate the effects of age, sex and season change on electrocardiograms of Van cats. Thirty-eight (male and female) healthy Van cats, 3-15 months old were used. Electrocardiograms (ECGs) and heart radiographs were obtained from cats seperately in summer, autumn, winter and spring. ECGs were recorded as bipolar, augmented unipolar and precordial leads (CV_6LL, CV_6LU, V_10). Durations and amplitudes of waves on the trace were measured in lead II and the electrical axis also measured in leads I and III. Radiographic examination was performed in the right lateral recumbency position (covering the whole thoracic cavity) …
Dietary Preferences Of Perch (Perca Fluviatilis L., 1758) Inhabiting Derbent Dam Lake (Bafra-Samsun) And Their Relationship With Seasonal And Age-Dependent Variations, Mahmut Yilmaz, Savaş Yilmaz, Şevket Kandemi̇r, Derya Bostanci, Nazmi̇ Polat
Dietary Preferences Of Perch (Perca Fluviatilis L., 1758) Inhabiting Derbent Dam Lake (Bafra-Samsun) And Their Relationship With Seasonal And Age-Dependent Variations, Mahmut Yilmaz, Savaş Yilmaz, Şevket Kandemi̇r, Derya Bostanci, Nazmi̇ Polat
Turkish Journal of Veterinary & Animal Sciences
The aim of this research was to establish whether the dietary preferences of perch (Perca fluviatilis L., 1758) change due to age and the seasons. Food items were examined by the Geometric Index of Importance (GII) method. The results obtained from this index were also evaluated in relation to seasonal and age-dependent variables. It was observed that the dietary preferences of perch do not change with age and the seasons.