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Articles 10051 - 10080 of 10499
Full-Text Articles in Entire DC Network
Geographic Variations And Taxonomic Status Of Miniopterus Schreibersi (Kuhl, 1819) In Turkey (Chiroptera: Vespertilionidae), İrfan Albayrak, Şule Coşkun
Geographic Variations And Taxonomic Status Of Miniopterus Schreibersi (Kuhl, 1819) In Turkey (Chiroptera: Vespertilionidae), İrfan Albayrak, Şule Coşkun
Turkish Journal of Zoology
This study is a taxonomical revision of 257 specimens of Miniopterus schreibersi (Kuhl, 1819) collected from Turkey between 1974 and 1994. A total of 30 external and cranial measurements and weights and the ages of the specimens were determined. Diagnostic characters, habitat, and measurements of subspecies were recorded. The specimens collected in Turkey were evaluated by comparison with the nominate form distributed nearby, Miniopterus schreibersi pallidus Thomas, 1907, and synonyms. It was determined that both the nominate form and Miniopterus schreibersi pallidus exist in Turkey.
Lessepsian Fishes Spreading Along The Coasts Of The Mediterranean And The Southern Aegean Sea Of Turkey, Hati̇ce Torcu, Savaş Mater
Lessepsian Fishes Spreading Along The Coasts Of The Mediterranean And The Southern Aegean Sea Of Turkey, Hati̇ce Torcu, Savaş Mater
Turkish Journal of Zoology
The taxonomy and biological characters of 22 Lessepsian fishes living on the coasts of the Eastern Mediterranean and Aegean Sea were examined and 8 species were determined to have commercial importance. Of these, Upeneus moluccensis and Saurida undosquamis have become economic fishes of the Eastern Mediterranean trawl fisheries, having significant stocks. The species previously misidentified as Upeneus asymmetricus was determined to be Upeneus pori. It has been pointed out that new species can be added to the recorded ones by the consequent influx of Red Sea biota into the Levant.
Genetics And Some Aging-Related Mechanisms, Şükran Çakir
Genetics And Some Aging-Related Mechanisms, Şükran Çakir
Turkish Journal of Zoology
Aging can be defined as the time-dependent decline of physiological functions of an organism. Aging, a multifactorial process composed of both genetic and environmental components, is a highly complex biologic phenomenon of great importance. The details of the mechanisms leading to aging are not yet known. All changes in the process of aging have a cellular basis, and perhaps aging should be studied, fundamantally, at the cellular level under defined and controlled environmental conditions. Some genetic approaches have promise for the understanding of this multifactorial process. In this review, some causal hypotheses related to oxidative damage, caloric restriction, mitochondrial mutations, …
Erythrocyte Measurements In Lacerta Rudis (Reptilia, Lacertidae), Murat Sevi̇nç, İsmai̇l Hakki Uğurtaş, Hi̇kmet Sami̇ Yildirimhan
Erythrocyte Measurements In Lacerta Rudis (Reptilia, Lacertidae), Murat Sevi̇nç, İsmai̇l Hakki Uğurtaş, Hi̇kmet Sami̇ Yildirimhan
Turkish Journal of Zoology
In this study, which was carried out in July 1998, erythrocyte sizes of Lacerta rudis were examined. The L. rudis specimens were collected from Zigana Pass (Trabzon) at an altitude of 1820 m. Blood smears were prepared at Zigana Pass. Mature erythrocytes (entire cell) and their nuclei lengths and widths were measured by means of an ocular micrometer at a total magnification of 1600x.
Two New Localities For Lacerta Sicula Hieroglyphicaberthold, 1842 (Reptilia, Lacertidae), İsmai̇l Hakki Uğurtaş, Hi̇kmet Sami̇ Yildirimhan, Mehmet Öz
Two New Localities For Lacerta Sicula Hieroglyphicaberthold, 1842 (Reptilia, Lacertidae), İsmai̇l Hakki Uğurtaş, Hi̇kmet Sami̇ Yildirimhan, Mehmet Öz
Turkish Journal of Zoology
In this study, we describe 13 Lacerta sicula hieroglyphica collected from the centre of Bursa and Çakırca, a village about 10 km west of Iznik. The specimens, including their habitat characteristics and distribution, are described. This subspecies is known to live on islands in the Marmara Sea and in Istanbul. This is the first report of L. s. hieroglyphica from Bursa and Çakırca village and therefore its distributional range is being extended to the south of the Marmara Sea.
Herpetofauna Of The Eastern Region Of The Amanos Mountains (Nur), İsmai̇l Hakki Uğurtaş, Hi̇kmet Sami̇ Yildirimhan, Mehmet Öz
Herpetofauna Of The Eastern Region Of The Amanos Mountains (Nur), İsmai̇l Hakki Uğurtaş, Hi̇kmet Sami̇ Yildirimhan, Mehmet Öz
Turkish Journal of Zoology
In this study, Herpetofauna of the eastern region of t he Amanos mountains in Turkey was investigated. A total of 319 samples were collected and 27 species from 17 amphibian and reptile families were described. Two of these species are urodeles, three are anurans, two are turtles, eleven are lizards and eight are snakes.
Benthi-Planktivorous Fish-Induced Low Water Quality Of Lake Eymir Before Biomanipulation, Meryem Bekli̇oğlu, S. Levent Burnak, Özlem İnce
Benthi-Planktivorous Fish-Induced Low Water Quality Of Lake Eymir Before Biomanipulation, Meryem Bekli̇oğlu, S. Levent Burnak, Özlem İnce
Turkish Journal of Zoology
In this study, Lake Eymir, Eymir inflow 1, Kışlakçı brook and Eymir outflow were sampled monthly betwen March 1997and April 1998 for physico-chemical and biological parameters. Within the catchment of the lake, there are small-scale industries, sewage effluent of TEK residence and recreational activities causing high concentrations of dissolved inorganic nitrogen (DIN) and total phosphorus (TP) in the eymir inflow 1 and in Kışlakçı brook. In Lake Eymir although diversion of sewage effluent of the Mogan municipality to İmrahor valley appeared to have led to a decrease in TP and DIN concentrations compared with those found in 1994, especially the …
A Review Of Ecological Features Of Fishes Inhabiting Chatkal Biosphere Reserve In Uzbekistan, Ulughbek T. Mirzaev
A Review Of Ecological Features Of Fishes Inhabiting Chatkal Biosphere Reserve In Uzbekistan, Ulughbek T. Mirzaev
Turkish Journal of Zoology
This paper provides brief data on the distribution, morphology, biology and way of life of the fishes inhabiting rivers located in Chatkal Biosphere Reserve. The rivers of this reserve are inhabited by cold-loving fishes adapted to mountain conditions. These fishes are characterized by low fecundity, bigger size of eggs and a slower growth. Most of these fishes are small inhabitants of stony-pebble parts of the rivers and are capable of pressing themselves to the bottom and hiding themselves behind stones.
A Preliminary Study On The Ostracoda (Crustacea) Fauna Of Lake Beyşehir, Selçuk Altinsaçli, Mustafa Kiliç, Songül Altinsaçli
A Preliminary Study On The Ostracoda (Crustacea) Fauna Of Lake Beyşehir, Selçuk Altinsaçli, Mustafa Kiliç, Songül Altinsaçli
Turkish Journal of Zoology
The material was collected in July and September 1997 from 15 stations on Lake Beyßehir. A total of 15 species ( Ilyocypris biplicata, Ilyocypris gibba, Ilyocypris bradyi, Candona neglecta, Pseudocandona compressa, Prionocypris zenkeri, Eucypris virens, Heterocypris rotundata, Heterocypris incongruens, Cypria ophtalmica, Physocypria kraepelini, Cypridopsis vidua, Potamocypris zschokkei, Psychrodromus olivaceus, Darwinula stevensoni) belonging to 12 genera were determined. Of these, Heterocyprisrotundatais new addition to the Ostracoda fauna of Turkey.
Elimination Of Essential (Cu, Zn) And Non-Essential (Cd, Pb) Metals From Tissues Of A Freshwater Fish Tilapia Zilli, Mustafa Kalay, Mustafa Canli
Elimination Of Essential (Cu, Zn) And Non-Essential (Cd, Pb) Metals From Tissues Of A Freshwater Fish Tilapia Zilli, Mustafa Kalay, Mustafa Canli
Turkish Journal of Zoology
Tilapia zilli were exposed to the same concentration (1 mg/L) of essential (Cu, Zn) and non-essential (Cd, Pb) metals for 10 days so that these metals would accumulate in the liver, gill, brain and muscle tissues. Subsequently, the animals were transferred to uncontaminated water for a period of elimination, during which samples were taken at days 1, 7, 15 and 30. Cadmium and lead accumulated in all the tissues and the tissue concentrations increased many times compared to the levels of these metals in the control fish (
On The Polymorphic Meadow Spittlebug, Philaenus Spumarius (L.) (Homoptera: Cercopidae), Selçuk Yurtsever
On The Polymorphic Meadow Spittlebug, Philaenus Spumarius (L.) (Homoptera: Cercopidae), Selçuk Yurtsever
Turkish Journal of Zoology
Due to its interesting biological aspects, the meadow spittlebug Philaenus spumarius has received great attention from biologists for decades. It has been one of the extensively studied species in ecology and genetics. This homopteran insect shows very high habitat diversity and therefore has a wide global distribution. Adults exhibit a heritable colour/pattern polymorphism on the dorsal surface throughout its range. A similar colour/pattern variation also occurs in certain ventral parts. Recent laboratory studies have dealt with its polyandrous aspect that is, females may mate several times with different males and the offspring of a single female may be fathered, therefore, …
Effects Of Host Species On Some Biological Characteristics Of Apanteles Galleriae Wilkinson (Hym.; Braconidae), Fevzi̇ Uçkan, Adem Gülel
Effects Of Host Species On Some Biological Characteristics Of Apanteles Galleriae Wilkinson (Hym.; Braconidae), Fevzi̇ Uçkan, Adem Gülel
Turkish Journal of Zoology
Koinobiont and solitary, early instar larval endoparasitoid, Apanteles galleriae Wilkinson were reared on two lepidopterous host species, the greater wax moth, Galleriae mellonella (L.) and the small wax moth, Achoria grisella Fabr. under a photoperiod of 12:12 h (D: L) at 25°C and 60 % relative humidity. The parasitoid with three larval instars completed its immature developmental period within 26-28 days when it was reared on G. mellonella and within 25-27 days on A. grisella. The adult parasitoid has no preoviposition period. In the first 24 hours of the adult female life span, 10 to 20 eggs were laid. The …
Comparison Of Simulation Algorithms For The Hopfield Neural Network: An Application Of Economic Dispatch, Tankut Yalçinöz, Hali̇s Altun
Comparison Of Simulation Algorithms For The Hopfield Neural Network: An Application Of Economic Dispatch, Tankut Yalçinöz, Hali̇s Altun
Turkish Journal of Electrical Engineering and Computer Sciences
This paper is mainly concerned with an investigation of the suitability of Hopfield neural network structures in solving the power economic dispatch problem. For Hopfield neural network applications to this problem three important questions have been answered: what the size of the power system is; how efficient the computational method; and how to handle constraints. A new mapping process is formulated and a computational method for obtaining the weights and biases is described. A few simulation algorithms used to solve the dynamic equation of the Hopfield neural network are discussed. The results are compared with those of a classical technique, …
Cover And Contents
Turkish Journal of Electrical Engineering and Computer Sciences
No abstract provided.
Cover And Contents
Turkish Journal of Electrical Engineering and Computer Sciences
No abstract provided.
Cover And Contents
Turkish Journal of Veterinary & Animal Sciences
No abstract provided.
Acute Phase Effect Of Trichloroethylene Ingestion On Some Biological Markers In Dogs, Recep Aslan, Mehmet Tütüncü, S. Oktay Aslan, Yilmaz Dündar
Acute Phase Effect Of Trichloroethylene Ingestion On Some Biological Markers In Dogs, Recep Aslan, Mehmet Tütüncü, S. Oktay Aslan, Yilmaz Dündar
Turkish Journal of Veterinary & Animal Sciences
Trichloroethylene (TE) is an environmental toxic solvent hazardous to human and domestic animals and well known in the industrial sector. The purpose of this study was to determine whether oral TE plays a role in lipid oxidation and tissue damage. Fourteen dogs were treated with an oral toxic dose of 0.5 ml/kg T.E. The acute changes that occurred in creatine kimase (CK), malondialdehyte (MDA), superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) were investigated in blood samples taken before application and 8, 24, 48, 72 and 168 hours after treatment. SOD and GSH-Px activities decreased, protein, albumin and alcalen phosphate did …
Cover And Contents
Turkish Journal of Veterinary & Animal Sciences
No abstract provided.
Investigations On The Biology Of Red Mullet ( Mullus Barbatus Linnaeus, 1758) In Edremit Bay, Aegean Sea, Turkey, Özlem Çeli̇k, Hati̇ce Torcu
Investigations On The Biology Of Red Mullet ( Mullus Barbatus Linnaeus, 1758) In Edremit Bay, Aegean Sea, Turkey, Özlem Çeli̇k, Hati̇ce Torcu
Turkish Journal of Veterinary & Animal Sciences
In this study, has been carried out to investigate some growth features of the red mullet ( Mullus barbatusLinnaeus, 1758) which is the important commercially species of the North Aegean Sea. Have been examined: Sex distrubution, growth in lenght and weight,condition factor, diet regimes and spawning period. The percentage of females was 68.78 % and males 31.22 % out of 474 specimens which ranged between age group I - IV. The lenght and weight differences between females and males were not statistictically significant. The lenght- weight relationship and growth equations were estimated as follows, respectively: W =0.0157 L 2.9811 , …
Cover And Contents
Turkish Journal of Veterinary & Animal Sciences
No abstract provided.
Cover And Contents
Turkish Journal of Veterinary & Animal Sciences
No abstract provided.
A Study On Blood Group Allelles Of Denizli Fowl, Fevzi̇ Tahi̇r Aksoy, Okan Ertuğrul, Fati̇h Atasoy, Şükrü Gürler, Meti̇n Erdoğan
A Study On Blood Group Allelles Of Denizli Fowl, Fevzi̇ Tahi̇r Aksoy, Okan Ertuğrul, Fati̇h Atasoy, Şükrü Gürler, Meti̇n Erdoğan
Turkish Journal of Veterinary & Animal Sciences
Blood group alleles and their frequencies were estimated within a Denizli fowl flock. Sixteen full sib family groups we- re formed to facilitate the identification of segregating alleles. Immune antisera were produced by means of reciprocal immunizati- ons between the parents. Reference reagents were obtained from W. E. Briles, Department of Biological Sciences, Northern Illino- is University. Reference reagents were used for the blood typing. In the flock in question, the allele genes which belong to blood group systems A, B, C, D, E and L were estimated and their frequencies calculated. In the A blood group system, A1 , …
Cover And Contents
Turkish Journal of Veterinary & Animal Sciences
No abstract provided.
Cover And Contents
Turkish Journal of Veterinary & Animal Sciences
No abstract provided.
Production Of Monoclonal Antibodies Specific Forprogesterone, Fatma Şahi̇ngöz Yücel, Beyazit Çirakoğlu
Production Of Monoclonal Antibodies Specific Forprogesterone, Fatma Şahi̇ngöz Yücel, Beyazit Çirakoğlu
Turkish Journal of Biology
Progesterone levels in milk and serum are indicators of pregnancy in cattle. The progesterone level reaches a peak on the 21 st and 22 nd days of pregnancy. Monoclonal antibodies specific to progesterone could be used for the immunodetection of milk and serum progesterone levels. We report here the development of hybrid cells prdoducing monoclonal antibodies specific for progesterone using hybridoma technology. Hybridoma cells secreting monoclonal antibodies against progesterone (MAM 2H11, MAM 6G6) were developed by fusion of the spleen cells of an immunized BALB/c mouse with FO (ATCC CRL 1646) mouse myeloma cells. These monoclonal antibodies were characterized for …