Veterinary Medicine Commons^™

Sheep Updates 2007 - Part 5, Bindi Murray, John Karlsson, Johan Greeff, Carolina Viñoles Gil, B. L. Paganoni, K. M. M. Glover, J. T. B. Milton, G. B. Martin, Hugh Dove, Bill Mckiernan, John Wilkins, Paul Greenwood, Linda Cafe

Sheep Updates

This session covers six papers from different authors:

GENETIC IMPROVEMENT

1. Breech Strike Resistance: Selecting for resistance traits reduces breech strike, Bindi Murray, John Karlsson, Johan Greeff, Department of Agriculture and Food, Western Australia

2. Breeding Merino Sheep for Worm Resistance increases profit in a Mediterranean Environment, John Karlsson and Johan Greeff Department of Agriculture and Food, Western Australia

FEEDING

3. Embryo lasses were not increased when Merino ewes that had lost weight were supplemented with lupins, C. Viñoles Gil, B.L. Paganoni, K.M.M. Glover, J.T.B. Milton & G.B. Martin, School of Animal Biology, Faculty of Natural and Agricultural Sciences, …

The Use Of Hazelnut Meal As A Substitute For Soybean Meal In The Diets Of Rainbow Trout (Oncorhynchus Mykiss), Özlem Bi̇lgi̇n, Ali̇ Türker, Ahmet Adem Teki̇nay

Turkish Journal of Veterinary & Animal Sciences

Hazelnut meal as a substitute for soybean meal in extruded feeds of rainbow trout was investigated. The performance of extruded feeds containing hazelnut meal as a substitute for 20% of soybean meal (Diet 2) and 30% of soybean meal (Diet 3) was compared to a nutritionally balanced control (Diet 1) (a commercial trout feed formulation). Each diet was fed to 3 replicate groups (initial BW: 36 ± 1.37 g; mean ± SD); the fish were fed the equivalent of 2% of their body weight, 2 times daily (0800 and 1600) for 64 days at 15 ± 0.11 °C under a …

Sheep Updates 2006 - Part 2, Darryl Smith, Kathryn Kemper, David Rutley, R. R. Woolaston, D. J. Brown, K. D. Atkins, A. E. Casey, A. J. Ball, David Hopkins, David Stanley, Leonie Martin, Arthur Gilmour, Remy Van De Ven, Geoff Duddy, Steve Semple, David Kessell, Andrew Thompson

Sheep Updates

This session covers six papers from different authors:

GENETICS

1. Novel selection traits - what are the possible side effects?, Darryl Smith, Kathryn Kemper, South Australian Research and Development Institute, David Rutley, University of Adelaide.

2. Genetic Changes in the Australian Merino since 1900, Sheep Genetics Australia Technical Committee, R.R. Woolaston Pullenvale, Queensland, D.J. Brown, Animal Genetics and Breeding Unit*, University of New England, K.D. Atkins, A.E. Casey, NSW Department of Primary Industries, A.J. Ball, Meat and Livestock Australia, University of New England

3. Influence of Sire Growth Estimated Breeding Value (EBV0 on Progeny Growth, David Hopkins, David Stanley, Leonie …

Effects Of Feeding Frequency On Growth, Feed Consumption, And Body Composition In Juvenile Turbot (Psetta Maxima Linnaeus, 1758) At Low Temperature, Ali̇ Türker

Turkish Journal of Veterinary & Animal Sciences

Juvenile turbot Psetta maxima (Linnaeus, 1758) (15.23 ± 2.99 g) were fed to satiation with a commercial extruded feed over a 60-day period. Feeding regimens were twice a day (TD), every other day (EOD), and 2-day intervals (TDI). Fish were kept in seawater (18 ppt) at 5-7.5 °C from January 21 to March 23, 2004. Feed conversion rate (FCR) and the protein efficiency ratios (PER) were within the ranges of 1.12-1.14 and 2.26-2.29, respectively. While the maximum relative growth rate (RGR), weight gain, and specific growth rate (SGR) were recorded in the TD group, they were lower in the EOD …

The Effects Of Red Pepper, Marigold Flower, And Synthetic Astaxanthin On Pigmentation, Growth, And Proximate Composition Of Penaeus Semisulcatus, Mustafa Göçer, Mahmut Yanar, Meti̇n Kumlu, Yasemen Yanar

Turkish Journal of Veterinary & Animal Sciences

Shrimps with an initial weight of 11.10 ± 0.26 g were fed diets supplemented with 6.6% red pepper (RP), 2.4% marigold flower (MF), and 100 mg/kg synthetic astaxanthin (SA), each of which contained 100 mg/kg total carotenoid, and a control diet (BD), without carotenoid supplement for 60 days. Dietary carotenoid sources did not significantly affect the growth of the shrimps (P > 0.05). SA supplementation yielded the highest survival rate (92%), followed by RP (82%) and the other diets (75%) (P < 0.05). All dietary carotenoid sources provided higher carotenoid accumulation compared to the control group (P < 0.05), but the difference between them was not significant (P > 0.05). RP and SA resulted in a greater protein increase in shrimp muscle than MF (P < 0.05); however, lipid, ash, and water content were similar in all diet groups (P > 0.05).

The Growth And Survival Characteristics Of Lambs Produced By Commercial Crossbreeding Kıvırcık Ewes With F_2 Rams With The German Black-Headed Mutton Genotype, Bülent Eki̇z, Ahmet Altinel

Turkish Journal of Veterinary & Animal Sciences

This study was conducted to compare the growth and survival characteristics of crossbred lambs produced by mating Kıvırcık ewes with German Black-Headed Mutton (GBM) x Kıvırcık (F_2) rams, GBM x Merino (F_2) rams, as well as the growth and survival characteristics of purebred Kıvırcık lambs. The data were obtained from 59 (GBM x Kıvırcık) x Kıvırcık, 59 (GBM x Merino) x Kıvırcık, and 60 purebred Kıvırcık lambs. The birth weights of (GBM x Kıvırcık) x Kıvırcık, (GBM x Merino) x Kıvırcık, and purebred Kıvırcık lambs were 4.08, 4.32, and 3.85 kg, respectively. The differences of birth weight between the genotype …

Determination Of The Recruitment To Stock And Reproduction Period For Flounder (Platichthys Flesus Luscus Pallas, 1811) Along The Trabzon-Rize Coast, Eastern Black Sea, Erhan Çi̇loğlu

Turkish Journal of Veterinary & Animal Sciences

The length and weight distribution of flounder (Platichthys flesus luscus Pallas, 1811) were 14.2-34.1 cm and 28.879-611.0 g, respectively. The samples were distributed between the 0 and VII age groups. Von Bertalanffy growth parameters for flounder were L_t = 41.241[1-e^{-0.161(t+3.240)}] for females, L_t= 33.567[1-e^{-0.181(t+3.525)}] for males and L_t = 40.577[1-e^{-0.142(t+3.105)}] for the sexes combined. Reproduction took place from December to March but peaked in December. Two recruitment periods were determined for flounder: the first was January to July, and the second August to November. The proportions of recruitment in the first and second periods were 68.13% and 31.87%, respectively.

Some Biological Properties Of The Leuciscus Cephalus (L., 1758) Population Living In Karakaya Dam Lake In Malatya (Turkey), Ercan Kalkan, Muhi̇tti̇n Yilmaz, A. Ümi̇t Erdemli̇

Turkish Journal of Veterinary & Animal Sciences

The sex distribution, growth in length and weight, growth rates and condition factors of Chub (Leuciscus cephalus (L., 1758)) in Karakaya dam lake were examined. Females made up 63.64% and males 36.37% (1.75:1) of 527 samples. The females and males were in the I-VI and I-V age groups, respectively. The reproductive properties of L. cephalus such as spawning period, age at attainment of maturity, egg diameter and ovarium weight were investigated. Student's t test showed that differences in length and weight between females and males of the same age groups were statistically insignificant (P > 0.05). The growth, both in length …

Performance Testing Studies And The Selection Of Hasmer, Hasak, Hasiv And Linmer Crossbreed Sheep Types: Ii. Pre-Weaning Growth, Mehmet Emi̇n Teki̇n, Mehmet Gürkan, Osman Karabulut, Hüseyi̇n Düzgün

Turkish Journal of Veterinary & Animal Sciences

This study was conducted to investigate the pre-weaning growth of crossbreed types. Fifteen genotypes (F_1 and B_1) were obtained by crossbreeding in the Animal Research Institute in Konya from 1989 to 1996. These 15 genotypes were classified in 4 appropriate genotype names: Hasmer, Hasak, Hasiv and Linmer. GLM and Tukey's HSD tests were used for statistical analyses. Year, genotype, sex, birth type, and dam's age were introduced into the model as fixed factors and birth weight was introduced as a covariate along with year x genotype interaction. While the effects of year, dam's age, birth type, and sex on birth …

Some Biological Characteristics Of The Tub Gurnard, Chelidonichthys Lucernus (Linnaeus, 1758) In The Sea Of Marmara, Lütfi̇ye Eryilmaz, Nuretti̇n Meri̇ç

Turkish Journal of Veterinary & Animal Sciences

The biology of the tub gurnard, Chelidonichthys lucernus (Linnaeus, 1758), has been studied on data collected between November 1996 and November 1997 from the Sea of Marmara. Totally, 224 tub gurnards were sampled. The age, growth, length-weight relationship, condition factor, male to female ratio, first sexual maturity age, length and reproduction period were examined. The age composition of samples ranged between 1 and 6 years. Total length ranged between 12.3 and 41.5 cm, while weight varied from 15 to 617 g. The total length-weight relationship was estimated as W=0.0092L^{3.019}. The parameters of the von Bertalanffy growth equation were: L_{\infity} = …

Estimates Of Maternal Effects For Pre- And Post- Weaning Daily Gain In Turkish Merino Lambs, Bülent Eki̇z

Turkish Journal of Veterinary & Animal Sciences

The aims of the study were to investigate the importance of maternal effects and to determine the most appropriate model of analyses for pre- and post-weaning daily gain of Turkish Merino lambs. Genetic parameters were estimated by REML procedure using DFREML program. Twelve different animal models were fitted by including or excluding maternal genetic effect, maternal permanent environmental effect, maternal temporary environmental effect and covariance between direct-maternal genetic effects. On the basis of log likelihood ratio test results, Model 2b, which included direct genetic and maternal temporary environmental effects, was determined to be the most appropriate model for both traits. …

The Growth And Survival Characteristics Of Holstein Female Calves Weaned At Various Ages, Ömür Koçak, Hali̇l Güneş

Turkish Journal of Veterinary & Animal Sciences

This study was carried out at Kırklereli - Karacadağ Farm of Tikveşli Agricultural Company. It was aimed to investigate the growth and survival characteristics and the most cost-effective weaning age of Holstein female calves weaned at various ages. In the study, 100 female calves born single from Holstein heifers were used and they were divided randomly into five groups each having 20 calves. The calves were weaned at 28 (Group 28), 35 (Group 35), 42 (Group 42), 56 (Group 52) and 70 (Group 70) days of age. The live weights at 180^{th} day of age of calves in 28, 35, …

The Effects Of Early Age Mating On Some Production Traits Of Bafra (Chios X Karayaka B_{1}) Sheep, Hali̇l Akçapinar, Necmetti̇n Ünal, Fati̇h Atasoy

Turkish Journal of Veterinary & Animal Sciences

The purpose of this study was to investigate the effects of early age mating on reproductive traits and survival rate and lamb growth of Bafra sheep. The animals used in the study were divided into two groups (Group I and Group II) according to age of animals. The animals in Group I, 344 ewe lambs, were about 10 months of age, while the animals in Group II, 174 yearlings, were about 18 months of age. The same feeding and management conditions were practised for both groups during mating season and pregnancy and lactation periods. The pre-mating live weights were 43.53 …

Age, Growth And Condition Of Capoeta Capoeta Angorae Hanko 1924 From The Upper Water Systems Of The River Ceyhan, Turkey, Ahmet Alp, Cemi̇l Kara, H. Murat Büyükçapar, Orhan Bülbül

Turkish Journal of Veterinary & Animal Sciences

The age, growth and condition factors were described for Capoeta capoeta angorae from the upper parts of the River Ceyhan from May 2000 to February 2001 and the differences in length in the same age group between streams and reservoirs populations were compared. A total of 629 C. c. angorae were examined and the ratio of males to females was estimated as 1.25:1.00. Eleven age groups were recorded from 0+ to 10+ years old and two- and three-year-old fish dominated the sample. The fork lengths (FLs) ranged from 3.1 to 41.5 cm and the majority of the samples were composed …

Some Parameters Of The Population Biology Of Spotted Flounder (Citharus Linguatula Linnaeus, 1758) In Edremit Bay (North Aegean Sea), Di̇lek Türker Çakir, Bahar Bayhan, Belgi̇n Hoşsucu, Aydin Ünlüoğlu, Sencer Akalin

Turkish Journal of Veterinary & Animal Sciences

A total of 1096 spotted flounder (Citharus linguatula Linnaeus, 1758) were caught in Edremit Bay from September 1998 to September 2000. Length-weight relationships, age, growth, mortality and sex ratio of the samples were investigated. Within the population of this species, most of the individuals in our samples ranged from 100 to 160 mm (69.63%), the minimum and maximum total lengths of the specimens being 69 and 222 mm, respectively. Positive allometric growth was observed for male, female and all fish. Age distribution of the samples was from I to IV. There was no significant difference between observed and calculated (von …

Some Biological Characteristics And The Stock Size Of The Pike (Esox Lucius L., 1758) Population In Lake Karamık (Afyon, Turkey), Hidir Çubuk, İsmet Balik, Rahmi̇ Uysal, Remzi̇ye Özkök

Turkish Journal of Veterinary & Animal Sciences

Some biological characteristics and the stock size of the pike (Esox lucius L., 1758) population in Lake Karamık were investigated between March 2002 and February 2003. The percentages of males and females in the population were 67.2% and 32.8%, respectively. Although fish samples ranged in age group from I to VII and from 15 to 66 cm in fork length, most of them were in age groups I-II and had fork lengths of 20-29 cm. The mean condition factor of the pike population was 0.812. In the population, the condition factors of females were higher than those of males. The …

Growth And Feed Utilization In Juvenile Black Sea Turbot (Psetta Maeotica) Under Different Photoperiod Regimes, Ali̇ Türker, Murat Yi̇ği̇t, Sebahatti̇n Ergün

Turkish Journal of Veterinary & Animal Sciences

The effects of 4 different experimental photoperiod regimes, LDN (natural photoperiod), LD24:0 (24 h light:0 h dark), LD12:12 (12 h light:12 h dark) and LD0:24 (0 h light:24 h dark), on feed intake and growth parameters of juvenile turbot (21 ± 2.3 g) in the Black Sea were determined. Growth was highest in the group exposed to the continuous photoperiod (LD24:0), followed by the LD12:12, LDN and LD0:24 groups in descending order. The lowest growth rate was recorded in the LD0:24 group. According to the results obtained, LD24:0 and LD12:12 photoperiod exposures are best for better growth and food conversion …

Growth And Milk Yield Traits Of Türkgeldi Sheep, Muhi̇tti̇n Özder, Mustafa Kaymakçi, Turgay Taşkin, Ertan Köycü, Fevzi̇ Karaağaç, Reşi̇t Sönmez

Turkish Journal of Veterinary & Animal Sciences

This study was conducted from data from 3 years of research performed at the Türkgeldi State Farm in 1997-2000. A total of 1053 Türkgeldi Pro-type B_1 Tahirova x Kıvırcık sheep including mature and young individuals were used as the study material. Litter size and fecundity were 1.42 and 1.51, respectively. The averages of birth weights and weaning weights were 3.43 and 20.04 kg, respectively. The average lactation milk yield was 100.62 kg, and the lactation period was 174.90 days. The levels of milk fat, protein, dry matter, ash and casein were 7.36%, 5.28%, 18.72%, 0.98% and 4.37%, respectively.

Age, Growth And Reproduction Of Tub Gurnard (Chelidonichthys Lucerna L. 1758) In The Bay Of İskenderun In The Eastern Mediterranean, Ali̇ İşmen, Pinar İşmen, Nuri̇ Başusta

Turkish Journal of Veterinary & Animal Sciences

The age composition, growth parameters, spawning season, sex ratio, length at first sexual maturity and fecundity of tub gurnard (Chelidonichthys lucerna) caught from the Bay of İskenderun in the eastern Mediterranean Sea were investigated. Females and males made up 58.2% and 41.8%, respectively, of the particular population of the species. The total length of females ranged from 8.0 cm to 30.3 cm, and of males from 8.3 cm to 21.2 cm. The length (L) - weight (W) relationships for males and females were estimated as W = 0.0089*L^{3.01} and W = 0.0095*L^{2.99}, respectively. The age data derived from otolith readings …

Effects Of Different Diets On The Growth Performance, Gonad Development And Body Composition At First Sexual Maturity Of Rainbow Trout (Oncorhynchus Mykiss), Devri̇m Memi̇ş, Hüseyi̇n Gün

Turkish Journal of Veterinary & Animal Sciences

Rainbow trout Oncorhynchus mykiss with an initial mean weight of 174 g (1+ year old) were fed on 3 different commercial diets (1 extruded pellet and 2 steam pellet) in the same environmental conditions until their first spawning. Changes in growth performance (weight gain, condition factor, specific growth rate and feed conversion rate), gonadosomatic index (GSI), hepatosomatic index (HSI) and body composition (protein, lipid, ash and dry matter) were investigated. The mean weight gain and condition factor for fish fed the extruded diet was significantly greater than for those fed the steam pellet diets (P < 0.05 ). There were no significant differences in specific growth rate, mean length increments and feed conversion rate among the groups, although the feed conversion rate for the extruded diet was slightly lower than the others. The HSI of the group fed an extruded diet was significantly greater than those of the others ( P < 0.05 ). The GSI values of female and male fish at the end of the study (October) did not differ significantly among the groups. Similarly, diet had no significant effects on the muscle composition of the trial fish, except that the muscle lipid of the group fed the extruded diet was significantly higher than those of the other groups (P < 0.05).

Some Biological Properties Of Mosquitofish Populations (Gambusia Affinis) Living In Inland Waters Of The Western Mediterranean Region Of Turkey, Şükrü Öztürk, Ramazan İki̇z

Turkish Journal of Veterinary & Animal Sciences

Gambusia affinis, Baird & Girard, 1853, originally comes from North America and has been distributed all over the world for the biological control of mosquitoes. This study aimed to determine some biological properties, such as structure, age, growth and reproduction of the populations of G. affinis in Turkey. For this purpose, between November 1998 and October 1999, 2026 mosquitofish were caught in the wetlands of Fethiye-Akgöl, Dalaman and Ortaca in Muğla province in the western Mediterranean region of Turkey and the data found were compared. In the Fethiye-Akgöl population the percentage of the 0+ age group was 97.59%, and of …

Growth Properties Of Pikeperch (Sander Lucioperca (L., 1758)) Living In Hirfanlı Dam Lake, Özlem Ablak, Mehmet Yilmaz

Turkish Journal of Veterinary & Animal Sciences

This study concerns an investigation of the growth properties of Sander lucioperca (L., 1758) living in Hirfanlı dam constructed on the Kızılırmak river. It was observed that 326 pikeperch (Sander lucioperca (L., 1758)) caught between August 1996 and July 1997 ranged between I and V years of age. The fork length and weight of the population were 105-529 mm and 12-1520 g. The length (L)-weight (W) relation and the condition factor were W = 0.00001049 L^{3.07} and 0.986, respectively.

A Comparative Study On The Growth And Survival Characteristics Of Lambs Produced By The Transfer Of In Vitro Produced (Ivp) Embryos, Şebnem Çörekçi̇, Alper Yilmaz, Sema Bi̇rler, Serhat Papuççuoğlu, Hatem Atalla

Turkish Journal of Veterinary & Animal Sciences

This study was carried out to determine the growth, survival rate and some body measurements until weaning of lambs produced by the in vitro production (IVP) method in comparison with those of lambs produced by artificial insemination. The lambs in the experimental group were produced by the transfer of IVP embryos developed to the blastocyst stage after the in vitro maturation and fertilisation of oocytes obtained from the ovaries of slaughtered ewes. The results of this study showed that the lambs produced by the IVP technique had a higher growth rate until weaning than did the lambs in the control …

Effects Of Spatially Localized And Dispersed Patterns Of Feed Distribution On The Growth, Size Dispersion And Feed Conversion Ratio Of The African Catfish (Clarias Gariepinus), Feri̇t Rad, Gülderen Kurt, A. Sezai̇ Bozaoğlu

Turkish Journal of Veterinary & Animal Sciences

The effects of spatially localized and spatially dispersed feeding patterns on the growth, size distribution and feed conversion ratio of the African catfish were investigated. Two groups of fish with an initial weight of 82.16 ± 4.80 and 82.40 ± 3.90 g were subjected to point source and scatter feeding patterns, respectively, for 2 months. Scatter fed fish reached a final mean weight of 192.69 ± 6.60 g while the mean final weight of point source fed fish was 169.67 ± 6.80 g ( P < 0.05). The specific growth rates of scatter and point source fed fish were 1.51% day^{-1} and 1.29% day^{-1}, respectively. The feed conversion ratio of scatter fed fish was 1.86 and that of point source fed fish was 2.29. The difference between the coefficient of size variation for scatter and point source fed fish was statistically insignificant (P > 0.05). However, the final size distribution curve for the scatter fed group showed a more …

The Structure, Mortality And Growth Of The Tench [Tinca Tinca (L., 1758)] Population In Çivril Lake, Denizli, Turkey, Süleyman Balik, Hasan M. Sari, Mustafa Ruşen Ustaoğlu, Ali̇ İlhan

Turkish Journal of Veterinary & Animal Sciences

The population structure, mortality and growth of the tench [Tinca tinca (L., 1758)] in Çivril Lake was investigated, using 506 fish caught with various gill nets between February 1998 and January 1999. The percentages of females and males in the population were 38.34% and 61.66%, respectively, and the overall female-male sex ratio was 1:1.61. Specimens ranged from 11.4 to 28.8 cm in fork length, and from 27.7 to 420.4 g in weight. The age distribution was I-V in the population. For all individuals, the length-weight relation and von Bertalanffy growth parameters were W = 0.018 L^{3.01}, and L_{\infity} = 33.85 …

Growth Properties Of Mirror Carp (Cyprinus Carpio L., 1758) Introduced Into Gelingüllü Dam Lake, Şeri̇fe Gülsün Kirankaya, Fi̇tnat Güler Ekmekçi̇

Turkish Journal of Veterinary & Animal Sciences

Some growth properties of 407 specimens of the mirror carp population introduced into Gelingüllü Dam Lake between 1998 and 2000 were studied in order to determine changes in growth over time. The data obtained were compared with those of other populations of the same species in other regions of Turkey. The age of the mirror carp in Gelingüllü Dam Lake ranged between I and V. The results revealed that this species, having a length of 20.8 ± 0.8 cm and a weight of 229 ± 21 g at age I, may attain a length of 53.5 ± 3.8 cm and …

The Effect Of Dietary Oils Of Vegetable Origin On The Performance, Body Composition And Fatty Acid Profiles Of Sea Bass (Dicentrarchus Labrax L., 1758) Juveniles, Mustafa Yildiz, Erdal Şener

Turkish Journal of Veterinary & Animal Sciences

Body fat composition and growth performance of sea bass juveniles fed with different kinds of vegetable oils instead of fish oil were studied. Feeding trials were carried out with 600 sea bass (Dicentrarchus labrax L.) juveniles with on initial live weight of 7.58 ± 0.13 g. Experimental feeds contained fish oil, soybean oil, sunflower oil, corn oil and olive oil. In the chemical analyses of the experimental feeds, total crude fat was 12.33 ± 0.24% and total crude protein was 57.42 ± 0.31%. According to fatty acid analyses EPA (7.57%) and DHA (11.91%) in the feed containing fish oil, linolenic …

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

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

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 …