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Articles 7951 - 7980 of 10522

Full-Text Articles in Zoology

Erythrocyte Measurements In Lacerta Rudis (Reptilia, Lacertidae), Murat Sevi̇nç, İsmai̇l Hakki Uğurtaş, Hi̇kmet Sami̇ Yildirimhan Jan 2000

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.

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Changes In The Protein And Lipid Content Of Muscle, Liver And Ovaries In Relation To Diphyllobothrium Spp. (Cestoda) Infection In Powan (Coregonus Lavaretus) From Loch Lomond, Scotland, Mustafa Dörücü Jan 2000

Changes In The Protein And Lipid Content Of Muscle, Liver And Ovaries In Relation To Diphyllobothrium Spp. (Cestoda) Infection In Powan (Coregonus Lavaretus) From Loch Lomond, Scotland, Mustafa Dörücü

Turkish Journal of Zoology

The present study was carried out to examine the relationship between helminth infections, nutrient reserves and gonadal status in powan in relation to infection with Diphyllobothrium spp. The relationship between fish size and body composition was also investigated. The condition factor increased with increasing length for uninfected fish and decreased for infected fish. This demonstrates the negative effect of infection on the growth of the fish. The mean percentage of protein and lipid content of muscle, liver and gonads were 89 %, 71.7 % and 64.9 % and 5.03 %, 23.3 % and 14.5 % respectively. A statistically significant correlation …

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Toxicity Of Crude Neem Leaf Extract Against Housefly Musca Domestica L. Adults As Compared With Ddvp, Dichlorvos, Mohammad Farahullah Khan, Syed Muzaffar Ahmed Jan 2000

Toxicity Of Crude Neem Leaf Extract Against Housefly Musca Domestica L. Adults As Compared With Ddvp, Dichlorvos, Mohammad Farahullah Khan, Syed Muzaffar Ahmed

Turkish Journal of Zoology

Toxicity of neem extract in comparison with DDVP (Dichlorvos) was determined against the housefly ( Musca domestica L). Neem leaf extract was applied at 5, 10, 20, 40 and 80 microgram/fly and DDVP was treated in 0.1, 0.2, 0.4, 0.8 and 1.6 microgram/fly doses. Lethal dose values were calculated with probit analysis and LD 50 and LD 90 values were found to be 8.4 and 169.8 ug/fly of neem extract respectively, whereas, values of 0.44 and 3.58 ug/fly of DDVP were found for LD 50 and LD 90 against house flies.

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Electrophoretic Aspects Of Blood-Serum Proteins Of Apodemus Mystacinus And Apodemus Agrarius (Mammalia: Rodentia) In Turkey, Reyhan Çolak, Ercüment Çolak, Nuri̇ Yi̇ği̇t, Mustafa Sözen, Şaki̇r Özkurt Jan 2000

Electrophoretic Aspects Of Blood-Serum Proteins Of Apodemus Mystacinus And Apodemus Agrarius (Mammalia: Rodentia) In Turkey, Reyhan Çolak, Ercüment Çolak, Nuri̇ Yi̇ği̇t, Mustafa Sözen, Şaki̇r Özkurt

Turkish Journal of Zoology

In this study, globulin and albumin proteins of Apodemus mystacinus and Apodemus agrarius were examined using the SDS-PAGE (sodium dodecyl sulphate-polyacrylamide gel electrophoresis) technique. In A. mystacinus, there were 7-8 bands in the globulin region and 2-3 bands in the prealbumin zone. It was determined that there were variations in both the globulin region and prealbumin zone in populations of A. mystacinus. In specimens of A. agrarius, nine bands appeared in the globulin region, and two bands were observed in the prealbumin zone. These findings showed that A. mystacinus differs from A. agrarius in respect to electrophoretic aspects of albumin …

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Systematic Studies On Rhysotritia Ardua (C.L. Koch) (Acari, Oribatida) In Erzincan And Erzurum Plains, Şule Baran, Nusret Ayyildiz Jan 2000

Systematic Studies On Rhysotritia Ardua (C.L. Koch) (Acari, Oribatida) In Erzincan And Erzurum Plains, Şule Baran, Nusret Ayyildiz

Turkish Journal of Zoology

Morphological features of Rhysotritia ardua (C.L. Koch) collected from Erzincan and Erzurum plains were reexamined and illustrated under light and scanning electron microscopes. Abnormalities in the notogastral, anal and adanal setae were observed.

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A Faunistic Study On The Freshwater Cladocera (Crustacea) Species In Turkish Thrace (Edirne, Tekirdağ, Kırklareli), Hüseyi̇n Güher Jan 2000

A Faunistic Study On The Freshwater Cladocera (Crustacea) Species In Turkish Thrace (Edirne, Tekirdağ, Kırklareli), Hüseyi̇n Güher

Turkish Journal of Zoology

A total of 47 different localities including lakes, ponds, streams, rivers and other bodies of water were surveyed between 1996 and 1998 in order to determine the Cladocerean (Crustacea) fauna of the Turkish Thrace region. Thirty-nine species of Cladocera were collected, out of which, 10 are new of the Thrace region of Turkey. The distribution of the species are given according to their localities and province.

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The Ciliate Fauna In The Digestive System Of Rana Ridibunda (Amphibia: Anura)-Ii Nyctotherus (Nyctotheridae: Heterotrichida), Naci̇ye Gülkiz Şenler, İsmai̇l Yildiz Jan 2000

The Ciliate Fauna In The Digestive System Of Rana Ridibunda (Amphibia: Anura)-Ii Nyctotherus (Nyctotheridae: Heterotrichida), Naci̇ye Gülkiz Şenler, İsmai̇l Yildiz

Turkish Journal of Zoology

A new ciliate species, Nytotherus oektemae n. sp. and common rectal ciliate of anuran amphibians, Nyctotherus cordiformis were isolated from the rectums of Rana ridibunda collected in the vicinity of Van. The morhological characteristics of these Protozoa were described and their similarities and differences were discussed.

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Two New Localities For Lacerta Sicula Hieroglyphicaberthold, 1842 (Reptilia, Lacertidae), İsmai̇l Hakki Uğurtaş, Hi̇kmet Sami̇ Yildirimhan, Mehmet Öz Jan 2000

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.

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Herpetofauna Of The Eastern Region Of The Amanos Mountains (Nur), İsmai̇l Hakki Uğurtaş, Hi̇kmet Sami̇ Yildirimhan, Mehmet Öz Jan 2000

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.

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Morphology Of Lung Of Rana Ridibunda With Observations On Changes Occurring Under Different Conditions, Füsun Öztay Jan 2000

Morphology Of Lung Of Rana Ridibunda With Observations On Changes Occurring Under Different Conditions, Füsun Öztay

Turkish Journal of Zoology

The frogs used in this study were divided into three groups. The first group consisted of frogs collected from their natural habitat, and these animals were dissected immediately. The bodies of the frogs in the second group were totally submerged in water at +4 °C, and the third group of frogs was kept in a dry environment. The lung sections were examined under a light microscope after being stained. The lungs were found to have three folds: the primary, secondary and tertiary septa. Goblet cells were not only found among the ciliated cells but were also seen among pneumocytes. In …

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Community Structure Of Zooplanktonic Organisms In Lake Akşehir, Nuray Emi̇r Akbulut Jan 2000

Community Structure Of Zooplanktonic Organisms In Lake Akşehir, Nuray Emi̇r Akbulut

Turkish Journal of Zoology

In this study, the abundance and seasonal distribution of rotifer and crustacean zooplankton were examined. A negative correlation beetween rotifers and crustaceans in terms of their abundancy rates was observed. Copepods were most abundant and comprised 43.3 %; rotifers comprised 34 % and cladocerans comprised 22.6% of the total zooplanktonic organisms. Copepods were abundant in autumn whereas rotifers were abundant in spring and autumn but cladocerans were abundant in summer periods. Some zooplanktonic organisms recorded in all samples throughout the study period were Filinia, Hexarthra, Brachionus, Asplanchna, Keratella, Arctodiaptomus spinosus and Diaphanosoma lacustris.

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Short Term Secondary Production And Population Dynamics Of Crustacea And Rotifera In Three Different Biotopes Of Neusiedler See (Austria), Nuray Emi̇r Akbulut Jan 2000

Short Term Secondary Production And Population Dynamics Of Crustacea And Rotifera In Three Different Biotopes Of Neusiedler See (Austria), Nuray Emi̇r Akbulut

Turkish Journal of Zoology

This paper describes the population dynamic parameters of the two cructaceans Diaphanosoma mongolianum, Arctodiaptomus spinosus and four rotifer species which are Filinia longiseta, Hexartra mira, Brachionus angularis and Polyartha vulgaris.

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Growth Conditions And Stock Analysis Of The Carp (Cyprinus Carpio, Linnaeus 1758) Population In Gölhisar Lake, Ahmet Alp, Süleyman Balik Jan 2000

Growth Conditions And Stock Analysis Of The Carp (Cyprinus Carpio, Linnaeus 1758) Population In Gölhisar Lake, Ahmet Alp, Süleyman Balik

Turkish Journal of Zoology

In this study, growth in the carp population was investigated using samples caught with longline nets of different mesh sizes. Mortality rate and stock analysis were calculated by length frequency data taken from commercial fisheries. The age composition of the samples was from I to VI. The fork lengths were between 10.5 and 49.4 cm, the total weights were found to be between 20.19 and 1922.20 g. and condition factors ranged from 1.298 to 2.388. The total mortality rate (Z) was found to be 1.36±0.10, the natural mortality rate (M) was 0.35 and the fishing mortality rate (F) was 1.01. …

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Benthi-Planktivorous Fish-Induced Low Water Quality Of Lake Eymir Before Biomanipulation, Meryem Bekli̇oğlu, S. Levent Burnak, Özlem İnce Jan 2000

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 …

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Laboratory Evaluation Of Bromethalin Against Lesser Bandicoot Rat, Bandicota Bengalensis, Abdul Azi̇z Khan, Syed Waqar Ali̇ Ri̇zvi̇ Jan 2000

Laboratory Evaluation Of Bromethalin Against Lesser Bandicoot Rat, Bandicota Bengalensis, Abdul Azi̇z Khan, Syed Waqar Ali̇ Ri̇zvi̇

Turkish Journal of Zoology

Results of no-choice and choice feeding tests against Bandicota bengalensis showed that bromethalin is highly toxic and efficacious rodenticide. However, its susceptibility differed between sexes. In no-choice test minimum time of cent-percent mortality was 1.2 days (range 1-2). The amount of toxicant consumed per rat resulting in complete mortality was 4.92±0.78 and 5.09±0.22 mg/kg in female and male rats respectively. In choice tests, mean days to death was 2.1 (range 1-4 days) and the amount of toxicant consumed per rat averaged 5.56±0.30 mg/kg. The latency period exceeded 210 minutes of the poisoning.

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A Review Of Ecological Features Of Fishes Inhabiting Chatkal Biosphere Reserve In Uzbekistan, Ulughbek T. Mirzaev Jan 2000

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.

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A Study On The Possibilities Of Obtaining Larva From Native Flat Oysters (Ostrea Edulis L. ) Living In The Black Sea And Larval Metamorphosis Stage, Orhan Uyan, Orhan Aral Jan 2000

A Study On The Possibilities Of Obtaining Larva From Native Flat Oysters (Ostrea Edulis L. ) Living In The Black Sea And Larval Metamorphosis Stage, Orhan Uyan, Orhan Aral

Turkish Journal of Zoology

In this research, the possiblities of obtaining larva from oysters ( Ostrea edulis L.) living in the Black Sea and their metamorphosis stage were investigated. There were no difficulties in obtaining larvae. The results of this investigation indicate that flat oyster ( Ostrea edulis L.) culture is possible in Black Sea conditions.

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Effects Of Temperature And Substrate On Growth And Survival Of Penaeus Semisulcatus (Decapoda: Penaeidae) Postlarvae, Meti̇n Kumlu, O. Tufan Eroldoğan Jan 2000

Effects Of Temperature And Substrate On Growth And Survival Of Penaeus Semisulcatus (Decapoda: Penaeidae) Postlarvae, Meti̇n Kumlu, O. Tufan Eroldoğan

Turkish Journal of Zoology

This study was carried out to determine the optimal water temperature and to investigate the effects of additional substrate on growth and survival during the nursery culturing of Penaeus semisulcatus in two separate experiments. At the end of six weeks, survivals of postlarvae (PLs) at 22, 24, 26, 30 and 34¡C were 52, 46, 70, 30 and 40%, respectively. The highest (2.76 mm/week) and lowest growth rates in terms of total length (0.43-0.49 mm/week) were displayed by the PLs grown at 34¡C and 22-24¡C, respectively. Growth rates were 1.75 mm/week at 30¡C and 1.03 mm/week at 26¡C. Final individual weight …

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Two New Records Of Nenteriaoudemans, 1915 (Acari: Uropodina: Trematuridae) For Turkey, Durmuş Ali̇ Bal, Muhli̇s Özkan Jan 2000

Two New Records Of Nenteriaoudemans, 1915 (Acari: Uropodina: Trematuridae) For Turkey, Durmuş Ali̇ Bal, Muhli̇s Özkan

Turkish Journal of Zoology

Two species of Nenteria, collected from Erzincan plain, Nenteria styliferaand Nenteria stammeri, are new records for the fauna of Turkey. Their morphological features were re-examined and diagrams of them were drawn. In addition, their zoogeographical distribution is given.

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A Systematic Study On The Otolith Characters Of Sparidae (Pisces) In The Bay Of İzmir (Aegean Sea), H. Tuncay Kinacigi̇l, Okan Akyol, Gülnur Meti̇n, Hülya Saygi Jan 2000

A Systematic Study On The Otolith Characters Of Sparidae (Pisces) In The Bay Of İzmir (Aegean Sea), H. Tuncay Kinacigi̇l, Okan Akyol, Gülnur Meti̇n, Hülya Saygi

Turkish Journal of Zoology

The otolith morphologies of 13 species belonging to the Sparidae family collected from the Bay of İzmir (Aegean Sea) were examined separately and the characteristics were drawn. The values obtained from measurements are given in the 95% confidence interval. With discriminant analysis, the groups were formed depending on the data collected. As a result of this analysis, it is possible to identify the species from the Sparidae family by the otolith characters.

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Taxonomy And Distribution Of The White Toothed Shrews Crocidura)(Soricidae: Insectivora: Mammalia) Of Turkey, Coşkun Tez Jan 2000

Taxonomy And Distribution Of The White Toothed Shrews Crocidura)(Soricidae: Insectivora: Mammalia) Of Turkey, Coşkun Tez

Turkish Journal of Zoology

A total of 359 samples were collected from different geographical regions in Turkey and the species boundaries of white toothed shrews (genus Crocidura) in Turkey were defined using morphological and karyological characteristics. According to these characteristics, it was determined that Crocidura leucodon with karyotype of 2n = 28 and FN = 56 and Crocidura suaveolens with karyotype of 2n = 40 and FN =50 are distributed in Turkey. In both species, the shape of the skull, the shapes and positions of incisive (I 1 ), premolar (P 4 ), molar (M 3 ), tail length, dorsal and ventral side colours …

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A Preliminary Study On The Ostracoda (Crustacea) Fauna Of Lake Beyşehir, Selçuk Altinsaçli, Mustafa Kiliç, Songül Altinsaçli Jan 2000

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.

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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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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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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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