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2000

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Articles 121 - 139 of 139

Full-Text Articles in Zoology

Ultrastructure Of The Cortex Of The Rumen Ciliate Ophryoscolex Purkynjei Stein, 1858 (Entodiniomorphida: Ophryoscolecidae), Gürsel Ergen, Bayram Göçmen, Beri̇a Falakali Mutaf Jan 2000

Ultrastructure Of The Cortex Of The Rumen Ciliate Ophryoscolex Purkynjei Stein, 1858 (Entodiniomorphida: Ophryoscolecidae), Gürsel Ergen, Bayram Göçmen, Beri̇a Falakali Mutaf

Turkish Journal of Zoology

The ultrastructure of the cortex of Ophryoscolex purkynjei,an entodiniomorphid ciliate obtained from domesticated cattle rumens, was studied and found to have five layers. A particulate and/or filamentous glycocalyx layer, triple membrane layer, homogeneous epiplasmic layer with very fine grains, microtubular layer characterized with a double row of microtubule bundles each containing at most 6 units, and a compact microfilamentous layer were identified. In addition, scarce and disorganized kinetosomes and related microtubules were found to lie underneath all of these. These observations are discussed with reference to the findings of previous studies of other entodiniomorphid ciliates.

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Ultrastructural Features Of The Intrinsic Lingual Muscles In The Frog, Rana Ridibunda, Mukaddes Eşrefoğlu, Özgen Vuraler Jan 2000

Ultrastructural Features Of The Intrinsic Lingual Muscles In The Frog, Rana Ridibunda, Mukaddes Eşrefoğlu, Özgen Vuraler

Turkish Journal of Zoology

The ultrastructural features of the intrinsic lingual muscles in the frog were investigated. The pieces obtained from the anterior part of the tongue were fixed in 3% gluteraldehyde and postfixed in 0.1% osmium tetroxide. Ultrathin sections stained with uranyl acetate and lead citrate were examined in a JEOL-100SX electron microscope. The muscle fibers were irregular in shape. The sarcoplasm was occupied largely by the myofibrils. In the same muscle fiber, longitudinal, transverse and oblique sections of the myofibrils were observed. Thus, regular transverse striation was prominent in some areas. In these areas, Z lines, I bands and A bands were …

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The Influence Of The Dictyocaulus Filaria On The Phospholipid And Fatty Acid Composition In The Blood Of Sheep, G. M. Bastarbekova, A. E. Kuchbaev, D. A. Azimov Jan 2000

The Influence Of The Dictyocaulus Filaria On The Phospholipid And Fatty Acid Composition In The Blood Of Sheep, G. M. Bastarbekova, A. E. Kuchbaev, D. A. Azimov

Turkish Journal of Zoology

This paper provides results of an analysis of phospholipids (PL) and their fatty acid (FA) content in the blood of sheep infected by the nematode Dictyocaulus filaria. Significantly high level of arachidonic acid in the lysophospholipids, and low levels of docozangexenic acid in the phospholipids were obtained, which indicate structural and functional disorders of cellular membranes in blood during dictyocaulosis. These disorders are regarded as metabolic criteria for an assessment of the relation between parasite and host.

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The Efficacy Of A Phytopesticide In Comparison With Perfekthion Against Sucking Pests Of Cotton, Mohammad Aslam, Syed Naim-Ul-Hasan Naqvi Jan 2000

The Efficacy Of A Phytopesticide In Comparison With Perfekthion Against Sucking Pests Of Cotton, Mohammad Aslam, Syed Naim-Ul-Hasan Naqvi

Turkish Journal of Zoology

The efficacy of neem product (phytopesticide FWB) was compared with perfekthion against sucking pests of cotton (jassids, thrips and whiteflies). Perfekthion proved to be more toxic but its effect lasted for 4 days only while neem product (FWB) was less toxic but its effect lasted for 6 days. Moreover, neem product is much safer and non-polluting.

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Effect Of Temperature On The Toxicity Of Zinc, Copper And Lead To The Freshwater Amphipod Gammarus Pulex Pulex(L., 1758), Levent Bat, Mehmet Akbulut, Mehmet Çulha, Ayşe Gündoğdu, Hasan Hüseyi̇n Satilmiş Jan 2000

Effect Of Temperature On The Toxicity Of Zinc, Copper And Lead To The Freshwater Amphipod Gammarus Pulex Pulex(L., 1758), Levent Bat, Mehmet Akbulut, Mehmet Çulha, Ayşe Gündoğdu, Hasan Hüseyi̇n Satilmiş

Turkish Journal of Zoology

This study showed the effect of temperature on copper, zinc and lead toxicity to the freshwater amphipod Gammarus pulex pulex. 96-h LC 50 values were estimated for copper, zinc and lead in this species using the static bioassay method. Increase in the concentration of copper, zinc and lead decreased the survival of the animals. The LC 50 values of Cu, Zn and Pb for Gammarus pulex pulexranged from 0.028 to 0.080, 5.2 to 12.1 and 11.2 to 23.2 mg/l, respectively. The results indicated that Cu was more toxic to the species, followed by Zn and Pb. The results were compared …

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The Diel Vertical Distribution Of Zooplankton In The Southeast Black Sea, Funda Erkan, Ali̇ Cemal Gücü, Julia Zagorodnyaya Jan 2000

The Diel Vertical Distribution Of Zooplankton In The Southeast Black Sea, Funda Erkan, Ali̇ Cemal Gücü, Julia Zagorodnyaya

Turkish Journal of Zoology

The diel changes in the vertical distribution of zooplankton in the southeast Black Sea were described in this study. The zooplankton were sampled using two different sampling methods throughout one day in October 1996 and July 1997 at the same station. The zooplankton counts, the length measurements and biomass estimates showed that the zooplankton in the southeast Black Sea is dominated by small organisms, among which Noctiluca scintillans is the dominant species. In the vertical distribution of zooplankton, three groups were observed in different layers. Calanus euxinus and Pseudocalanus elongatus showed a clear vertical migration pattern. Conventional measurements (settling volume, …

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Elimination Of Essential (Cu, Zn) And Non-Essential (Cd, Pb) Metals From Tissues Of A Freshwater Fish Tilapia Zilli, Mustafa Kalay, Mustafa Canli Jan 2000

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 (

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Seasonal Variations Of Demersal Fish Composition In Gülbahçe Bay (İzmir Bay), Cengi̇z Meti̇n, Zafer Tosunoğlu, Adnan Tokaç, Altan Lök, Celaletti̇n Aydin, Hakan Kaykaç Jan 2000

Seasonal Variations Of Demersal Fish Composition In Gülbahçe Bay (İzmir Bay), Cengi̇z Meti̇n, Zafer Tosunoğlu, Adnan Tokaç, Altan Lök, Celaletti̇n Aydin, Hakan Kaykaç

Turkish Journal of Zoology

In the present study, the seasonal variations in demersal catch composition in Gülbahçe Bay were investigated by trawl sampling. Species identification of the samples was carried out at class, family and species levels. The results of this study were compared to those of previous studies carried out in the same area and it was concluded that red mullet, which is the dominant species of Gülbahçe Bay, has lost this characteristic because of overfishing and marine pollution. For this reason, fishing activities and the discharge of domestic waste waters should be strictly controlled.

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On The Polymorphic Meadow Spittlebug, Philaenus Spumarius (L.) (Homoptera: Cercopidae), Selçuk Yurtsever Jan 2000

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, …

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A Study On The Pelagic And Demersal Fishes Of İskenderun Bay, Nuri̇ Başusta, Ünal Erdem Jan 2000

A Study On The Pelagic And Demersal Fishes Of İskenderun Bay, Nuri̇ Başusta, Ünal Erdem

Turkish Journal of Zoology

This study was conducted in İskenderun Bay, Mediterranean Sea, between December 1994 and November 1996. Systematic of the fish species inhabiting the bay were examined. Out of 145 species of 111 genera of 67 families there were 19 species belonging to the Chondrictyes and 126 species belonging to the Osteictyes. Of all these species, 22 were Lessepsian migrant fish species.

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Age Determination Methods Of Solea Lascaris (Risso, 1810) Inhabiting The Black Sea, Derya Bostanci, Nazmi̇ Polat Jan 2000

Age Determination Methods Of Solea Lascaris (Risso, 1810) Inhabiting The Black Sea, Derya Bostanci, Nazmi̇ Polat

Turkish Journal of Zoology

This study was conducted to determine the most reliable bony structures for ageing Solea lascaris inhabiting the Black Sea. The relations between four different bony structures are presented in tables and figures by scale, vertebra, otolith and broken burnt-otolith ages of 215 samples collected between October 1996 and October 1997. It is concluded the broken-burnt otolith is the most reliable structure for ageing this species. The Von Bertalanffy growth equation was estimated from the broken-burnt otolith age as L_t=24.85 x [1-e-^{0.113(t+3.87)}].

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Apoptosis: Programmed Cell Death, Mahmut Çalişkan Jan 2000

Apoptosis: Programmed Cell Death, Mahmut Çalişkan

Turkish Journal of Zoology

Programmed cell death has been found in many multicellular organisms and occurs as a part of normal development as well as in pathological processes associated with some diseases. Programmed cell death, or apoptosis, is the process whereby certain cells are induced to activate their own death or cell suicide. Apoptosis has been described in a wide variety of cell and tissue types from nematodes to mammals. Apoptosis, unlike necrosis, is mediated by the active participation of dying cells. In another words, the dying cells synthesize certain proteins and enzymes to carry out the "suicide" process. The genes involved in apoptosis …

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Histological And Histochemical Studies On The Extensor Muscle Of The Pectoral Fin Of Rainbow Trout (Oncorhynchus Mykiss), Fati̇me Geyi̇koğlu, Abdullah Özkaral Jan 2000

Histological And Histochemical Studies On The Extensor Muscle Of The Pectoral Fin Of Rainbow Trout (Oncorhynchus Mykiss), Fati̇me Geyi̇koğlu, Abdullah Özkaral

Turkish Journal of Zoology

In this study, taking the extensor muscle out of the pectoral fin of trout, lipid and mitochondria contents of muscle fibres were examined. Succinic dehydrogenase and Sudan black B stain methods were applied on the sections removed by freezing microtomy. Haematoxylen and eosin staining were also applied on the sections obtained from paraffin blocks. It was observed histologically that nuclei of muscle fibre were located just under the sarcolemma. Three types of fibres red, intermediate and white were identified by the applied histochemical methods. It was observed that this muscle was rich in red and intermediate fibres. As a result, …

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The Growth Characteristics Of Chondrostoma Regium (Heckel, 1843) In Atatürk Dam Lake (Turkey), S. Ahmet Oymak Jan 2000

The Growth Characteristics Of Chondrostoma Regium (Heckel, 1843) In Atatürk Dam Lake (Turkey), S. Ahmet Oymak

Turkish Journal of Zoology

In this study, growth characteristics including as age composition, condition factor, growth, and age-length, age-weight and length-weight relationships, in Chondrostoma regium (Heckel, 1843) living in Atatürk Dam Lake on the Euphrates River were determined. A total of 725 specimens of age groups I-VIII were investigated. The length of females and males was found statistically different only in age group III, while the weights were statistically different in age groups III and IV (P

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Faunistic And Taxonomic Studies On The Family Buprestidae (Coleoptera) In Erzurum, Erzincan, Artvin And Kars Provinces I. Acmaeoderinae, Polycestinae And Buprestinae, Göksel Tozlu, Hi̇kmet Özbek Jan 2000

Faunistic And Taxonomic Studies On The Family Buprestidae (Coleoptera) In Erzurum, Erzincan, Artvin And Kars Provinces I. Acmaeoderinae, Polycestinae And Buprestinae, Göksel Tozlu, Hi̇kmet Özbek

Turkish Journal of Zoology

A faunal and taxonomic study on the family Buprestidae (Coleoptera) was conducted in the provinces of Artvin (Central, Ardanuç, Borçka, Hopa, Şavşat and Yusufeli), Erzincan (Central, Tercan and Üzümlü), Erzurum (Central, Aşkale, Çat, Horasan, Ilıca, İspir, Narman, Oltu, Olur, Pasinler, Pazaryolu, Şenkaya, Tortum and Uzundere) and Kars (Digor and Sarıkamış) in 1993-1997. A total of 46 species and subspecies were recorded belonging to 3 subfamilies, namely Acmaeoderinae (12 species), Polycestinae (1) and Buprestinae (33). Of these taxa, Acmaeodera (s.str.) transcaucasica Semenov, Dicerca (s.str.) chlorostigma Mannerheim, Anthaxia (Haplanthaxia) truncata Abeille de Perrin and Acmaeoderella (Carininota) flavofasciata albifrons (Abeille de Perrin) are …

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Faunistic And Taxonomic Studies On The Family Buprestidae (Coleoptera) In Erzurum, Erzincan, Artvin And Kars Provinces Ii. Sphenoptarinae, Chalcophorinae, Chrysobothrinae, Agrilinae, Cylindromorphinae And Trachyinae, Göksel Tozlu, Hi̇kmet Özbek Jan 2000

Faunistic And Taxonomic Studies On The Family Buprestidae (Coleoptera) In Erzurum, Erzincan, Artvin And Kars Provinces Ii. Sphenoptarinae, Chalcophorinae, Chrysobothrinae, Agrilinae, Cylindromorphinae And Trachyinae, Göksel Tozlu, Hi̇kmet Özbek

Turkish Journal of Zoology

A faunal and taxonomic study on the family Buprestidae (Coleoptera) was carried provinces of Artvin (Central, Ardanuç, Borçka, Hopa, Şavşat and Yusufeli), Erzincan (Central, Tercan and Üzümlü), Erzurum (Central, Aşkale, Çat, Horasan, Ilıca, İspir, Narman, Oltu, Olur, Pasinler, Pazaryolu, Şenkaya, Tortum and Uzundere) and Kars (Digor and Sarıkamış) in 1993-1997. A total of 38 species were recorded belonging to 6 subfamilies, namely Sphenopterinae (7 species), Chalcophorinae (8), Chrysobothrinae (3), Agrilinae (17), Cylindromorphinae (2) and Trachyinae (1). Of these taxa, Sphenoptera (s.str.) ixion Kerremans is a new record for the Turkish fauna. Agrilus (s.str.) aurichalceus Redtenbacher, Coraebus elatus (Fabricius), Coraebus rubi …

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Effects Of Host Species On Some Biological Characteristics Of Apanteles Galleriae Wilkinson (Hym.; Braconidae), Fevzi̇ Uçkan, Adem Gülel Jan 2000

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 …

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Feasibility Of Inducing Overlap Immunologic Competence In Gallinaceous Birds With Ascardia Dissimilis And A. Galli, Julie Hamilton, Thomas A. Yazwinski Jan 2000

Feasibility Of Inducing Overlap Immunologic Competence In Gallinaceous Birds With Ascardia Dissimilis And A. Galli, Julie Hamilton, Thomas A. Yazwinski

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

Chickens and turkeys are routinely infected with the roundworms Ascaridia galli and A. dissimilis, respectively. The current study was conducted to gather basic information on these worms and to determine whether heterologous infections (chicken worms in turkeys and turkey worms in chickens) would be successful. Chickens and turkeys were obtained at day of hatch, brooded to 7 days of age, and placed in pens (25/pen) according to infection as received at 7 days of age: homologous, heterologous and control (no infection). Bird weights, mortalities, and feed efficiencies were monitored for 3 weeks postinfection, at which time all birds were killed …

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Livability Of Leghorn Balut Embryos Stored Under Varying Temperatures And Storage Times, Joyce Jong, F. Dustan Clark Jan 2000

Livability Of Leghorn Balut Embryos Stored Under Varying Temperatures And Storage Times, Joyce Jong, F. Dustan Clark

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

Baluts are fertile chicken or duck eggs that have been incubated and removed from the incubator prior to hatching for consumption. Chicken eggs are incubated for 11 to 14 days and duck eggs are incubated for 16 to 20 days. Baluts have an extremely specialized consumer market, with the majority of its consumers of Filipino decent. Current U.S. Department of Agriculture regulations for the storage of baluts prior to sale is 7.2ºC, the same as for infertile commercial table eggs. Consumer preference is to purchase live baluts for consumption. Since exposure to 7.2ºC causes embryo mortality within 8 hours of …

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