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Full-Text Articles in Animal Sciences
Adding To The Reproductive Biology Of The Parthenogenetic Oribatid Mite, Archegozetes Longisetosus (Acari, Oribatida, Trhypochthoniidae), Michael Heethoff, Michael Laumann, Paavo Bergmann
Adding To The Reproductive Biology Of The Parthenogenetic Oribatid Mite, Archegozetes Longisetosus (Acari, Oribatida, Trhypochthoniidae), Michael Heethoff, Michael Laumann, Paavo Bergmann
Turkish Journal of Zoology
The oribatid mite, Archegozetes longisetosus, serves as a chelicerate model organism due to its relatively short life cycle and ease of laboratory culturing. It is a parthenogenetic species and all cultures recently used in different laboratories are descendants of a single female collected in 1993. While aspects of its developmental and functional biology have been published, knowledge of its reproductive rate and reproductive system is meager, and data on its life history are contradictory. Herein, we present the gross morphology of the reproductive system as obtained by SEM techniques and X-ray synchrotron microtomography, a new tool for studying mite anatomy. …
Growth And Reproduction Of Por's Goatfish (Upeneus Pori Ben-Tuvia & Golani, 1989) In İskenderun Bay, The Eastern Mediterranean, Ali̇ İşmen
Turkish Journal of Zoology
The age composition, growth parameters, spawning season, sex ratio, length at first sexual maturity and fecundity of por's goatfish (Upeneus pori) caught from the Bay of İskenderun in the eastern Mediterranean Sea were investigated. Females and males made up 52.6% and 47.4%, respectively, of the particular population of the species. The total length of females ranged from 7.0 cm to 17.0 cm, and of males from 6.6 cm to 15.1 cm. The length (L) - weight (W) relationships for males and females were estimated as W = 0.0108*L^{2.99} and W = 0.0097*L^{3.03}, respectively. The age data derived from otolith readings …
Seasonality Of Reproduction And Embryonic Growth Of Spiny Dogfish (Squalus Acanthias L., 1758) In The Eastern Black Sea, Sefa Ayhan Demi̇rhan, Kadi̇r Seyhan
Seasonality Of Reproduction And Embryonic Growth Of Spiny Dogfish (Squalus Acanthias L., 1758) In The Eastern Black Sea, Sefa Ayhan Demi̇rhan, Kadi̇r Seyhan
Turkish Journal of Zoology
The seasonality of reproduction and embryonic development of spiny dogfish (Squalus acanthias) sampled from the Eastern Black Sea were studied. The gestation period of spiny dogfish, starting in August, September and October, takes around 23-24 months. Fertilized females were caught at a depth of 30-45 m in July and August. Females with full-term pups and empty uteri were found at 50-60 m depth, where the temperature was 10 °C. Lengths of pups at birth were around 28-29 cm, whereas their weights ranged from 68 to 78 g. The models of embryonic growth and development of ova were described as TL_e …
Some Biological Characteristics Of Crayfish (Astacus Leptodactylus Eschscholtz, 1823) In Lake Eğirdir, İsmet Balik, Hidir Çubuk, Remzi̇ye Özkök, Rahmi̇ Uysal
Some Biological Characteristics Of Crayfish (Astacus Leptodactylus Eschscholtz, 1823) In Lake Eğirdir, İsmet Balik, Hidir Çubuk, Remzi̇ye Özkök, Rahmi̇ Uysal
Turkish Journal of Zoology
This study was conducted in Lake Eğirdir in 2001 and 2002, to investigate some biological characteristics, i.e. sex and length compositions, length-weight relationship and reproduction, of the crayfish (Astacus leptodactylus Eschscholtz, 1823) population. Sex ratios of crayfish caught with fykenets of 34 - mm mesh size (stretched mesh) were 65.2% male and 34.8% female. The total body lengths of both sexes ranged from 40 to 150 mm and the majority were in the 110 mm length class. Although the average lengths of both sexes were nearly the same, the average weight of male crayfish was higher than that of females. …
Age, Growth And Reproduction Of The Goldband Goatfish, Upeneus Moluccensis (Bleeker, 1855), In İskenderun Bay, The Eastern Mediterranean, Ali̇ İşmen
Turkish Journal of Zoology
The age composition, growth parameters, spawning season, sex ratio, length at first sexual maturity and fecundity of the goldband goatfish (Upeneus moluccensis) caught in İskenderun Bay in the eastern Mediterranean Sea were investigated. Females and males made up 51.6% and 48.4%, respectively, of the particular population of the species. The total length of females ranged from 7.0 cm to 20.5 cm, and of males from 7.0 cm to 17.8 cm. The length (L) - weight (W) relationships for males and females were estimated as W = 0.0118*L^{2.99} and W = 0.0097*L^{3.00}, respectively. The age data derived from otolith readings were …
Some Biological Characteristics Of The Tub Gurnard, Chelidonichthys Lucernus (Linnaeus, 1758) In The Sea Of Marmara, Lütfi̇ye Eryilmaz, Nuretti̇n Meri̇ç
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} = …
Some Productive Characteristics Of F_1, B_1 And F_{1}Xb_{1} Crossbreeds From Simmental X Sar Crossbreeding, Mehmet N. Orman, Okan Ertuğrul, Orhan Alpan
Some Productive Characteristics Of F_1, B_1 And F_{1}Xb_{1} Crossbreeds From Simmental X Sar Crossbreeding, Mehmet N. Orman, Okan Ertuğrul, Orhan Alpan
Turkish Journal of Veterinary & Animal Sciences
South Anatolian Red (SAR) cattle are well adapted to the arid, hot and harsh conditions of the region and have the highest milk yield among the local breeds in Turkey. The purpose of this study was to determine the main productive characteristics, such as viability, reproduction and milk production, of F_1, B_1 and F_{1}XB_{1} crossbred genotype groups from Simmental x SAR crossbreeding. A t test was used for 2 group comparisons. In cases of insufficient numbers of variants in the groups Kruskal-Wallis and Mann-Whitney U tests were used where appropriate. There was no difficulty during birth in any of the …
The Influence Of Shearing On Reproduction In Angora Rabbits, Tayfur Bekyürek, Mustafa Ün, Orkun Demi̇ral
The Influence Of Shearing On Reproduction In Angora Rabbits, Tayfur Bekyürek, Mustafa Ün, Orkun Demi̇ral
Turkish Journal of Veterinary & Animal Sciences
The aim of this study was to determine the optimum time and the conditions of mating for Angora rabbits. The study was initiated with 60 French Angora rabbits (53 does and 7 bucks). All animals were kept in individual cages under the same environmental conditions. The does were divided into 6 groups: does in group 1 were mated a week before the shearing, does in group 2 were mated during the shearing period, does in group 3 were mated a week after shearing, does in group 4 were mated a month after shearing and does in group 5 were mated …
Observations On The Ecology, Reproduction And Behavior Of Spermophilus Bennett, 1835 (Mammalia: Rodentia) In Turkey, Şaki̇r Özkurt, Nuri̇ Yi̇ği̇t, Ercüment Çolak, Mustafa Sözen, Muhammed Mouradi Gharakheloo
Observations On The Ecology, Reproduction And Behavior Of Spermophilus Bennett, 1835 (Mammalia: Rodentia) In Turkey, Şaki̇r Özkurt, Nuri̇ Yi̇ği̇t, Ercüment Çolak, Mustafa Sözen, Muhammed Mouradi Gharakheloo
Turkish Journal of Zoology
Field and laboratory investigations on the ecology, reproduction and behavior of Spermophilus citellus and Spermophilus xantophrymnus were performed over a period of 4 years. Both S. citellus and S. xanthophrymnus are diurnal species and occupy semiarid steppe areas in Turkish Thrace and Anatolia, respectively. Distribution of the former species is confined to restricted steppe areas in Turkish Thrace whilethe, latter lives on the Anatolian steppe, and is sympatric with Meriones tristami, Mesocricetus brandthi, Allactaga williamsi and Microtus spp. The burrows of both species have one entrance, and are built separately in the field. They constitute small social colonies and communicate …
Effect Of Certain Factors On Productive And Reproductive Efficiency Traits And Phenotypic Relationships Among These Traits And Repeatabilities In West Anatolian Holsteins, Mustafa Tekerli̇, Mustafa Gündoğan
Effect Of Certain Factors On Productive And Reproductive Efficiency Traits And Phenotypic Relationships Among These Traits And Repeatabilities In West Anatolian Holsteins, Mustafa Tekerli̇, Mustafa Gündoğan
Turkish Journal of Veterinary & Animal Sciences
The present investigation was undertaken to study certain factors affecting production efficiency, milk production and reproduction and to estimate the repeatabilities and phenotypic correlations of these traits in Holsteins maintained at different farms in western Anatolia over 3 years (1990 - 1993). The data consisted of 506 first and 232 second lactations of 525 cows. Three production efficiency traits (milk yield per day of lactation length (MYPDLL), milk yield per day of calving interval (MYPDCI) and milk yield per day of age at second calving (MYPDASC)), one production trait (lactation yield (LY)), and one reproduction trait (calving interval (CI)) were …
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.
Investigation Of Some Biological Characteristics Of The Silver Crucian Carp, Carassius Gibelio (Bloch 1782) Population In Lake Eğirdir, İsmet Balik, Remzi̇ye Özkök, Hidir Çubuk, Rahmi̇ Uysal
Investigation Of Some Biological Characteristics Of The Silver Crucian Carp, Carassius Gibelio (Bloch 1782) Population In Lake Eğirdir, İsmet Balik, Remzi̇ye Özkök, Hidir Çubuk, Rahmi̇ Uysal
Turkish Journal of Zoology
Biological characteristics such as sex, age and length compositions, growth, condition factor, reproduction, mortality and exploitation rates of the silver crucian carp, Carassius gibelio (Bloch 1782), population in Lake Eğirdir were investigated between March 2001 and February 2002. According to the 616 specimens ranged in age groups from I to VI, the percentages of male and female individuals in the population were 53.4% and 46.6%, respectively. The fork lengths of the samples ranged from 9 to 33 cm. Allometric growth was also determined among the lengths and weights of both sexes. Incremental growth rates in length and weight for both …
Reproductive Biology In A Native European Catfish, Silurus Glanis L., 1758, Population In Menzelet Reservoir, Ahmet Alp, Cemi̇l Kara, Hakan Murat Büyükçapar
Reproductive Biology In A Native European Catfish, Silurus Glanis L., 1758, Population In Menzelet Reservoir, Ahmet Alp, Cemi̇l Kara, Hakan Murat Büyükçapar
Turkish Journal of Veterinary & Animal Sciences
The reproductive activities of Silurus glanis were investigated over 12 months in Menzelet Reservoir, in the East Mediterranean region of Turkey. Total length of the examined 245 S. glanis varied from 33.4 cm (220 g) to 195.0 cm (48,000 g), and age distribution ranged between 1 and 14. Observations on the seasonal distribution of the maturity stages and variations in the gonadosomatic index (GSI) confirmed that Silurus glanis has a prolonged spawning period extending from the beginning of June to August. The males mature earlier than the females, at a minimum size of 78.82 cm in total length and at …
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
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 …
Some Biological Properties Of Mosquitofish Populations (Gambusia Affinis) Living In Inland Waters Of The Western Mediterranean Region Of Turkey, Şükrü Öztürk, Ramazan İki̇z
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 …
The Reproduction Biology Of Chub (Leuciscus Cephalus L. 1758) In Topçam Dam Lake (Aydın, Turkey), Hüseyi̇n Şaşi
The Reproduction Biology Of Chub (Leuciscus Cephalus L. 1758) In Topçam Dam Lake (Aydın, Turkey), Hüseyi̇n Şaşi
Turkish Journal of Veterinary & Animal Sciences
In this study, the reproduction biology of 332 chub (Leuciscus cephalus L. 1758) was studied from June, 1999, to June, 2000, on a monthly basis in Topçam Dam Lake. Egg numbers were estimated in 65 females caught just prior to spawning. The sex and age compositions of chub were determined. The specimens were composed of 27.11% males and 72.89% females. Male and female chub become sexually mature in the second year of their life spans. Spawning is in March and April. The fecundity of chub varies from 2100-66,400 per female. The average egg diameter was between 0.391 and 0.744 mm …
Population Dynamics Of Soft-Furred Field Rat, Millardia Meltada, In Rice And Wheat Fields In Central Punjab, Pakistan, Shaher Bano Lathiya, Abdul Rauf Khokhar, Syed Muzaffar Ahmed
Population Dynamics Of Soft-Furred Field Rat, Millardia Meltada, In Rice And Wheat Fields In Central Punjab, Pakistan, Shaher Bano Lathiya, Abdul Rauf Khokhar, Syed Muzaffar Ahmed
Turkish Journal of Zoology
Data on the abundance, reproduction, diet and damage index of the soft-furred field rat Millardia meltada were collected during the rice and wheat seasons. The abundance of Millardia meltada remained high at the post-harvest stage of the rice and wheat crops. The ploughing of fields did not affect the abundance of Millardia. The mean annual prevalence of pregnancy was 50% and the mean embryonic litter size 6.2 ± 0.4. Millardia continued to eat wheat and rice grains over a long period even when there was no crop standing in the fields. The damage indices in rice and wheat crops were …
Reproduction Of The Silverbelly (Leiognathus Klunzingeri Steindachner, 1898) In Yumurtalık Bight (Adana), Turkey, Meltem Özütok, Dursun Avşar
Reproduction Of The Silverbelly (Leiognathus Klunzingeri Steindachner, 1898) In Yumurtalık Bight (Adana), Turkey, Meltem Özütok, Dursun Avşar
Turkish Journal of Veterinary & Animal Sciences
This present study was performed to identify reproductive peculiarities of the silverbelly (Leiognathus klunzingeri) in Yumurtalık Bight. For this purpose, 430 individuals were obtained by monthly sampling between October 1997 and September 1998 and then they were examined. By using the monthly changes in the mean values of the Gonadosomatic Index (GSI) and Fulton's Condition Factor (K), we found that reproduction period occurred between July and September, length at first maturity was 5.8 cm and 5.5 cm for males and females, respectively, egg diameter was between 0.8 and 1.0 mm and mean annual fecundity was 2789 ± 2109.
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 …
Gonad Histology And Spawning Pattern Of The White Grouper (Epinephelus Aeneus) From İskenderun Bay (Turkey), Mahmut Ali̇ Gökçe, İbrahi̇m Cengi̇zler, A. Argun Özak
Gonad Histology And Spawning Pattern Of The White Grouper (Epinephelus Aeneus) From İskenderun Bay (Turkey), Mahmut Ali̇ Gökçe, İbrahi̇m Cengi̇zler, A. Argun Özak
Turkish Journal of Veterinary & Animal Sciences
The gonad histology and spawning pattern of the white grouper (Epinephelus aeneus) were determined from fish sampled from commercial catches. Histological, microscopic and macroscopic techniques were used to examine the ovaries of E. aeneus. A six stage maturity scale based on morphology was proposed to classify ovarian development. The results showed that the white grouper has an asynchronous mode of ovarian development, and the histological study of oocyte development in the white grouper indicated that two types of inclusion, first lipid and then protein, are formed during vitellogenesis. Towards maturation, protein granules and lipid droplets increased in size and number …
Annual Cycle Of Serum Gonadal Steroids And Serum Lipids In Capoeta Capoeta Umbla, Güldenstaedt, 1772 (Pisces: Cyprinidae), Orhan Erdoğan, Hali̇l İbrahi̇m Hali̇loğlu, Abdulkadi̇r Çi̇ltaş
Annual Cycle Of Serum Gonadal Steroids And Serum Lipids In Capoeta Capoeta Umbla, Güldenstaedt, 1772 (Pisces: Cyprinidae), Orhan Erdoğan, Hali̇l İbrahi̇m Hali̇loğlu, Abdulkadi̇r Çi̇ltaş
Turkish Journal of Veterinary & Animal Sciences
Seasonal changes in serum concentrations of the testosterone in males, 17\beta-estradiol in females and triglyceride and cholesterol in both sexes of Capoeta capoeta umbla were determined. Peak concentrations of testosterone (2.828 ± 0.278 ng/mL) and 17\beta-estradiol (3.182 ± 0.116 ng/mL) occurred in May. The concentrations of testosterone and 17b-estradiol were significantly correlated with the gonadosomatic index in both sexes. After the spawning period, steroid hormone levels significantly diminished (P < 0.05). The triglyceride concentration was highest in April (607.611 ± 30.146 mg/dL). The serum cholesterol level showed a rising trend until April and reached peak values during this month (393.000 ± 8.991 mg/dL). In the spawning month (May), a significant decrease was observed in triglyceride and cholesterol concentrations (P < 0.05). These results suggest that seasonal changes in both serum lipids and steroid hormones were associated with reproductive activity in C. c. umbla.
Studies On The Age, Growth And Reproduction Characteristics Of The Chub, Leuciscus Cephalus Orientalis, (Nordmann, 1840) In Karasu River, Turkey, Orhan Erdoğan, Mustafa Türkmen, Ayhan Yildirim
Studies On The Age, Growth And Reproduction Characteristics Of The Chub, Leuciscus Cephalus Orientalis, (Nordmann, 1840) In Karasu River, Turkey, Orhan Erdoğan, Mustafa Türkmen, Ayhan Yildirim
Turkish Journal of Veterinary & Animal Sciences
This study is based on the examination of 759 chubs from Karasu River (40° 45´ 33´´ E, 39° 56´ 16´´ N) between November 1995 and October 1997. This population comprised seven age groups of males and nine of females. The second age group was dominant in the population. Individuals were composed of 50.46% males and 49.54% females. The male and female ratio was 1:1.019 (M:F). The Von Bertalanffy growth parameters and length-weight relationships were; L_t = 35.8765 (1-e^{-0.1241(t+1.16660)}), W_t = 583.2981 (1-e^{-0.1241(t+1.16660)})^{2.952}, W = 0.0150 FL^{2.952} in males and L_t = 41.4154 (1-e^{-0.1160(t+1.3207)}), W_t = 936.3338 (1-e^{-0.1160(t+1.3207)})^{2.980}, W = 0.0142 …
Age, Growth And Reproduction Of Acanthalburnus Microlepis, Filippi 1863 From The Yağan Region Of The Aras River, Turkey, Mustafa Türkmen, Orhan Erdoğan, H. İbrahi̇m Hali̇loğlu, Ayhan Yildirim
Age, Growth And Reproduction Of Acanthalburnus Microlepis, Filippi 1863 From The Yağan Region Of The Aras River, Turkey, Mustafa Türkmen, Orhan Erdoğan, H. İbrahi̇m Hali̇loğlu, Ayhan Yildirim
Turkish Journal of Zoology
The age, growth and reproduction characteristics of 1105 Acanthalburnus microlepis from the Yağan region of the Aras River, Turkey, were determined from monthly samples. Ages ranged from 1 to 7 years. The sex ratio was approximately 1.0 (51.49 % males, 48.51 % females). Females attained greater size and age than males. Von Bertalanffy growth parameters were: L_o= 29.87 cm, K= 0.1049, t_o= -1.92. The length-weight relationships for males and females were found to be W=0.0099L^{3.098} and W=0.0118L^{3.052} respectively. The condition coefficients of males and females were calculated as 1.192 and 1.209 respectively. Both sexes matured at the age of 2 …
Investigation Of Some Biological Characters Of The Vimba (Vimba Vimba Tenella (Nordmann,1840))Population In Karacaören I Dam Lake, Z. Arzu Becer, Ramazan İki̇z
Investigation Of Some Biological Characters Of The Vimba (Vimba Vimba Tenella (Nordmann,1840))Population In Karacaören I Dam Lake, Z. Arzu Becer, Ramazan İki̇z
Turkish Journal of Veterinary & Animal Sciences
In this study,808 vimba (Vimba vimba tenella(Nordmann,1840))individuals captured during October 1996-April 1998 from Karacaören I Dam Lake and some properties of reproduction were investigated. In the vimba population,age composition varied from 0-VII and 73.51% of the investigated samples belonged to I-II age group. The population was composed of 50.74% females and 49.26% males. It was determined that the reproductive activity of the vimba in the Karacaören I Dam Lake started in the middle of April and continued until the end of June. Sexual maturity ages were found to be II-III for females and II for males. Average egg numbers belonging …
Some Biological Characteristics Of Silurus Triostegus Heckel, 1843 From Atatürk Dam Lake (Turkey), Seyi̇t Ahmet Oymak, Kemal Solak, Erhan Ünlü
Some Biological Characteristics Of Silurus Triostegus Heckel, 1843 From Atatürk Dam Lake (Turkey), Seyi̇t Ahmet Oymak, Kemal Solak, Erhan Ünlü
Turkish Journal of Zoology
In this study, some biological characteristics such as age and sex composition, growth in length and weight, age-length, age-weight and length-weight relationships, condition factor spawning time, age of sexual maturity, and fecundity of Silurus triostegus in Atatürk Dam lake were investigated. The percentage of females was 48.3% and that of males 57.7% out of 623 specimens belonging to age groups I-XI. Isometric growth patterns were proved from the length-weight relationships. It was estimated that the females had higher Lo (202.85 cm) and lower low K (0.046871) values than males (Lo 113.98 cm and K = 0.101972). Mean condition factors of …
On The Age, Growth And Reproduction Of The Barbel, Barbus Plebejus Escherichi (Steindachner, 1897) In The Oltu Stream Of Çoruh River (Artvin-Turkey), Ayhan Yildirim, Orhan Erdoğan, Mustafa Türkmen
On The Age, Growth And Reproduction Of The Barbel, Barbus Plebejus Escherichi (Steindachner, 1897) In The Oltu Stream Of Çoruh River (Artvin-Turkey), Ayhan Yildirim, Orhan Erdoğan, Mustafa Türkmen
Turkish Journal of Zoology
In this study, the age, growth and reproduction properties of 627 barbels, Barbus plebejus escherichi (Steindachner, 1897), from Oltu Stream in the Çoruh River Basin were investigated during a period from August 1994 to July 1996. The age of this species ranged between age groups 1 and 10, the second age group being dominant. Individuals were composed of 64.59% males and 35.41% females. von Bertalanffy growth parameters and length-weight relationships were L_t=29.35x(1-e^{-0.139(t+1.640)}), W_t=281.11x(1-e^{-0.139(t+1.640)})^{2.843} W=0.0189.FL^{2.843} (r=0.96) in males and L_t=32.77x(1-e^{-0.116(t+1.891)}), W_t=392.10x(1-e^{-0.116(t+1.891)})^{2.911}, W=0.0152.FL^{2.911} (r=0.97) in females. Condition coefficients of males and females were calculated to be 1.221 and 1.220 respectively. Sexual maturity …
The Effects Of Plasma Vitamin C And Ceruloplasmin Levels And Exogen Vitamin C Supplementation On Reproduction In Sheep, Seyfullah Hali̇loğlu, Behi̇ç Serpek
The Effects Of Plasma Vitamin C And Ceruloplasmin Levels And Exogen Vitamin C Supplementation On Reproduction In Sheep, Seyfullah Hali̇loğlu, Behi̇ç Serpek
Turkish Journal of Veterinary & Animal Sciences
The effects of vitamin C on progesterone and oestradiol 17b synthesis, and fertility rate were studied in Merino sheep. A total of 60 sheep, aged between 2 and 7 years, of which 30 had low, and the other 30 had high plasma vitamin C levels were used. Each low and high vitamin C group was divided into 2 subgroups. Each subgroup had equal numbers of sheep. Subgroups 2 and 4 served as controls in the low and high vitamin C groups, respectively. 500 mg of vitamin C was injected intramuscularly into the subgroups 1 and 3 in the low and …
Reproduction Characteristics Of Thinlip Grey Mullet, Liza Ramada(Risso 1826) Inhabiting Akgöl-Paradeniz Lagoons (Göksu Delta), Serap Ergene Gözükara
Reproduction Characteristics Of Thinlip Grey Mullet, Liza Ramada(Risso 1826) Inhabiting Akgöl-Paradeniz Lagoons (Göksu Delta), Serap Ergene Gözükara
Turkish Journal of Zoology
In order to determine the reproduction characteristics of Liza ramada, a fish of economical importance, the GSI, egg diameter, sex maturity, age and sex ratio were examined in 228 specimens caught periodically, between February 1992 and July 1994 in Akgöl-Paradeniz Lagoon. According to the GSI % and egg diameter, the reproduction period of Liza ramada was determinedto be November and December. The lowest GSI % obtained for Liza ramada was 4.99 % in February and the highest values were16.67 % in November and 11.67 % in December. The average egg diameter of Liza ramadaranged from 0.15 to 0.69 mm. It …
The Monthly Variations In The Blood Glucose Level Of Capoeta Capoeta Capoeta (G.Ldenstaedt, 1772) Living In Aras River, Seyi̇t Aydin, Ayhan Yildirim, Orhan Erdoğan
The Monthly Variations In The Blood Glucose Level Of Capoeta Capoeta Capoeta (G.Ldenstaedt, 1772) Living In Aras River, Seyi̇t Aydin, Ayhan Yildirim, Orhan Erdoğan
Turkish Journal of Veterinary & Animal Sciences
In this study, the monthly variation in the blood glucose level of Capoeta capoeta capoeta caught from Aras between August 1995 and June 1996 was determined. The average blood glucose level was determined to be 112.04±5.19 mg/dl in males and 106.32±9.68 mg/dl in females and 110.06±4.19 mg/dl in the population. The blood glucose level was highest (141.07±13.67 mg/dl) in April, and lowest (69.14±9.75 mg/dl) in September. It was deter- mined that the level of blood glucose was related to temperature and reproduction.
Reproduction Properties Of Mugil Cephalus L., 1758 Live In Akgöl- Paradeniz Lagoon, Silifke, Serap Ergene Gözükara
Reproduction Properties Of Mugil Cephalus L., 1758 Live In Akgöl- Paradeniz Lagoon, Silifke, Serap Ergene Gözükara
Turkish Journal of Zoology
According to % GSI and egg diameter, reproduction periot of M. cephalus was determined to be on September and October mounth. Minimum % GSI obtained for M. cephalus was % 4.14 on June mounth and maximum % GSI was % 20.08 on July and % 17.26 on October. Avarage egg diameter of M. cephalus ranged between minimum 0.15 and maximum 0.69 mm. The egg diameters on September and October are 0.69 and 0.65 mm. .