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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 Development Of Brook Trout (Salvelinus Fontinalis Mitchill, 1814) Embryos During The Yolk Sac Period, Nadi̇r Başçinar, İbrahi̇m Okumuş, Ramazan Serezli̇
The Development Of Brook Trout (Salvelinus Fontinalis Mitchill, 1814) Embryos During The Yolk Sac Period, Nadi̇r Başçinar, İbrahi̇m Okumuş, Ramazan Serezli̇
Turkish Journal of Zoology
The growth rate during yolk absorption, yolk conversion efficiency, dry weight and water contents of brook trout (Salvelinus fontinalis Mitchill, 1814) larvae were observed and the relationships between degree-days were evaluated. While the mean wet weight was 72.45 ± 5.58 mg (n = 10) at hatching and reached 98.85 ± 6.22 mg just before the swim-up stage, the mean dry weights of the body and yolk sac were 2.70 ± 0.41 and 23.33 ± 0.59 mg at hatching and 9.49 ± 1.27 and 12.46 ± 1.14 mg at swim-up stages, respectively. The mean body dry matter and water content of …
The Effects Of Salinity On Postlarval Growth And Survival Of Penaeus Semisulcatus (Decapoda: Penaeidae), H. İbrahi̇m Soyel, Meti̇n Kumlu
The Effects Of Salinity On Postlarval Growth And Survival Of Penaeus Semisulcatus (Decapoda: Penaeidae), H. İbrahi̇m Soyel, Meti̇n Kumlu
Turkish Journal of Zoology
P. semisulcatus post-larvae (PLs) had higher survival and better growth at high rather than low salinities between PL20 and PL60. Final survivals at high salinities (30-40 ppt) (19-23%) were significantly higher than those (3-12%) below 25 ppt (P 0.05). A rise in salinity resulted in an increase in the biomass from 0.020 g at 10 ppt to 0.317 g at 40 ppt (P < 0.05). Optimum salinity for the nursery culture of P. semisulcatus PLs appeared to be about 40 ppt at 28 °C. Hence, the results of this study demonstrate that P. semisulcatus inhabiting the Mediterranean Sea is not a good candidate for culture in waters of low salinity.
Fertility Traits, Survival Rate And Growth Characteristics Of Karayaka And Bafra (Chios X Karayaka B_1) Genotypes, Necmetti̇n Ünal, Fati̇h Atasoy, Hali̇l Akçapinar, Meti̇n Erdoğan
Fertility Traits, Survival Rate And Growth Characteristics Of Karayaka And Bafra (Chios X Karayaka B_1) Genotypes, Necmetti̇n Ünal, Fati̇h Atasoy, Hali̇l Akçapinar, Meti̇n Erdoğan
Turkish Journal of Veterinary & Animal Sciences
This study was carried out to investigate the fertility traits, survival rate and growth characteristics of Karayaka and Bafra (Chios x Karayaka B_1) genotypes. Karayaka and Bafra genotypes are raised in the Black Sea region of Turkey. In the study, fertility results for Karayaka and Bafra were determined to be 92.3 and 93.7% for birth rates, and 1.08 and 1.78 for litter size, respectively. The survival rates of Karayaka and Bafra lambs at weaning (90 days) were 93.6 and 91.9%, respectively. The least squares means obtained for Karayaka and Bafra lambs were 3.1 and 3.7 kg for birth weight, 19.5 …
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 …
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 …
Simultaneous Comparison Of Various Production Traits Of Saanen X Hair Crossbred And Pure Hair Goats, Meti̇n Şengonca, Turgay Taşkin, Nedi̇m Koşum
Simultaneous Comparison Of Various Production Traits Of Saanen X Hair Crossbred And Pure Hair Goats, Meti̇n Şengonca, Turgay Taşkin, Nedi̇m Koşum
Turkish Journal of Veterinary & Animal Sciences
This investigation was carried out in order to simultaneously compare various production traits of Saanen x hair crossbred goats and pure hair goat flocks under rural environmental conditions. Fecundity, fertility and infertility values for Saanen x hair crossbred and pure hair goats were 1.25, 1.30 and 4.47%, and 0.72, 0.79 and 21.00%, respectively. The effects of genotype, year and age on fecundity, fertility and infertility for Saanen x hair crossbred and pure hair goats were significant (P < 0,01). Birth and weaning weights for Saanen x hair crossbred and pure hair kids were 3.70 kg and 2.63 kg, and 14.68 kg and 12.12 kg, respectively. The effects of genotype, year and age on the birth and weaning weights for Saanen x hair crossbred and pure hair kids were significant (P < 0.01, P < 0.05, respectively). The survival rates for Saanen x hair crossbred and pure hair kids were 95.76% and 78.61%, respectively. Daily average milk yield, lactation length and lactation milk yield in Saanen x hair crossbred and pure hair goats were; 1.83 kg, 201.5 days and 201.77 kg, and 0.56 kg, 143.7 days and 80.47 kg, respectively. The effects of genotype, year and age on the daily average milk yield, lactation length and lactation milk yield for Saanen x hair crossbred and pure hair goats were significant (P < 0.01).