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Articles 1981 - 2010 of 2109
Full-Text Articles in Life Sciences
Growth Properties Of Grey Mullet (Mugil Cephalus L., 1758) Live In Silifke, Akgöl-Paradeniz Lagoons, Serap Ergene Gözükara, Mustafa Kuru
Growth Properties Of Grey Mullet (Mugil Cephalus L., 1758) Live In Silifke, Akgöl-Paradeniz Lagoons, Serap Ergene Gözükara, Mustafa Kuru
Turkish Journal of Zoology
504 specimens of age composition of age composition of Mugil cephalus caught from Akgöl- Paradeniz Lagoon ranged between I.-VII. ages. According to the ages Mugil cephalus groups dispersion were determined that individuals in III years old were dominant ( % 29,76 ). The Mugil cephalus specimens consist of % 52.33 female and % 46.67 male. Average fork lenght for III.. years age is 293,79 mm. and average weight of them is 31, 47 g.. Maximum annual lenght increase is 62,13 mm. for III. age group and maximum annual weight increase is 263,73 g. for VII. age group were determined.
The Contents Of Digestion System Of Chondrostoma Regium Heckel, 1843 (Pisces: Cyprinidae) Population In Suat Uğurlu Dam Lake (Çarşamba-Samsun), Nazmi̇ Polat, Mahmut Yilmaz
The Contents Of Digestion System Of Chondrostoma Regium Heckel, 1843 (Pisces: Cyprinidae) Population In Suat Uğurlu Dam Lake (Çarşamba-Samsun), Nazmi̇ Polat, Mahmut Yilmaz
Turkish Journal of Zoology
The organisms in the contents of digestion system from 145 individuals of the brond-snout (Chondrostoma regium Heckel, 1843 Pisces: Cyprinidae) caught from Suat Uğurlu Dam Lake between April, 1993-March, 1994, have been studied by using the number and appearance frequency methods. Consequently, it is determined that 99.92% of the total diet of brond-snout is composed of Bacillariophyta and the 0.08% is of zooplanktons.
Distribution And Abundance Of The Octopods Eledone Cirrhosa (Lamarck, 1798) And Eledone Moschata (Lamarck, 1799) (Cephalopoda: Octopoda) In The Aegean Sea, Alp Salman, Tuncer Katağan
Distribution And Abundance Of The Octopods Eledone Cirrhosa (Lamarck, 1798) And Eledone Moschata (Lamarck, 1799) (Cephalopoda: Octopoda) In The Aegean Sea, Alp Salman, Tuncer Katağan
Turkish Journal of Zoology
Distributions and relative abundances of the Eledone cirrhosa and Eledone moschata species exist in Aegean Sea were analized by considering the seasonal data obtained in bottom trawl between 1991 and 1993. According to these result, it was determined that both species have different distribution features in Aegean Sea, both vertically and horizontally. Depending on depth it's evident that E.cirrhosa in various size prefers the stratum in different depth. Whereas E.moschata distributes relatively in the depth of 0-100 m. So regional, seasonal and vertical catch per unit effort (CPUE) of both species were calculated, and the regions, seasons and depths having …
The Effects Of Malathion Alkaline Phosphatase Activity In The Liver, Kidney And Small Intestine In Mice, Egemen Dere, Sevtap Bakir, Ati̇lla Atalay
The Effects Of Malathion Alkaline Phosphatase Activity In The Liver, Kidney And Small Intestine In Mice, Egemen Dere, Sevtap Bakir, Ati̇lla Atalay
Turkish Journal of Zoology
The effects of malathion on alkaline phosphatase activity in the liver, kidney and small intestine was investigated. Malathion doses of 40 mg kg^{-1} were injected intreperitonally (I:P) into mice. At 0, 4, 8, 16 and 24 hours after treatment with malathion, mice were decapitated and tissues were removed. Homogenate of the tissues was centrifugated at 48000xg for 30 minutes. The supernatant was used as an enzyme source. It was found that the malathion increased alkaline phosphatase activity in the kidney and decreased alkaline phosphatase activity in the liver and small intestine.
Light Microscopic Studies On The Histological Development And Histochemical Structure Of The Duodenum On The Prenatal Stage On The Sheeps, Kenan Çinar, Fuat Bi̇lgi̇n, Abdullah Di̇ler
Light Microscopic Studies On The Histological Development And Histochemical Structure Of The Duodenum On The Prenatal Stage On The Sheeps, Kenan Çinar, Fuat Bi̇lgi̇n, Abdullah Di̇ler
Turkish Journal of Zoology
This study was carried out with the aim to investigate of histological structure of duodenum and histochemical character of duodenal mucous on Akkaraman sheep foetus by during intrauterin development. In the study, the number 40 duodenum belonging to the Akkaraman sheep foetus was used as a material. More concentrate neutral mucosubstans and glycogen containing of Lamina epithelialis was determined that it is multilayer structure showing on early development stages not to be found of villi. The later development stages, neutral and asidic mucosubstans containing of goblet cells on Lamina epithelialis was detected that it is convertible to monolayer prizmatic form. …
Effect Of Synthetic Juvenile Hormone C-16 On The Adult Diapause In Anacridium Aegyptium L., Gürsel Ergen, Erdoğan Er
Effect Of Synthetic Juvenile Hormone C-16 On The Adult Diapause In Anacridium Aegyptium L., Gürsel Ergen, Erdoğan Er
Turkish Journal of Zoology
In this study, two different concentrations (10.000 ppm, 15.000 ppm) of synthetic juvenile hormone (SJH) C-16 were topically applied to the diapausing adults of Anacridium aegyptium L. (Orthoptera: Acrididae). The treatment of SJH at two concentrations induced yolk deposition and terminal oocytes growth. The findings showed that development of the eggs was directly proportional with the concentrations of SJH. Concentration of 15.000 ppm was found more effective than 10.000 ppm. Therefore, we have concluded that (SJH) C-16 can terminate adult reproductive diapause in A. aegyptium.
Accumulaton Of Metal And Metal Mixture In The Spleen, Brain And Muscle Tissues Of Tilapia Nilotica, Murat Karakoç, Feri̇t Kargin
Accumulaton Of Metal And Metal Mixture In The Spleen, Brain And Muscle Tissues Of Tilapia Nilotica, Murat Karakoç, Feri̇t Kargin
Turkish Journal of Zoology
Accumulation of zinc and copper in the spleen, brain and muscle tisses of Tilapia nilotica was investigated by using copper (0.1, 0.5 and 1.0 ppm) and zinc (1.0, 5.0 and 10.0 ppm) and copper-zinc mixture (0.1+1.0, 0.5+5.0 and 1.0+10.0 ppm) in the medium for the periods of 30 and 60 days. No mortality was observed during the exposure to of copper, zinc and copper-zinc mixtures over 60 days In both cases (alone and mixture) the highest levels of zinc and copper were accumulated in the spleen, whereas accumulation was the lowest in the brain. Accumulation of a metal in the …
Granular Haemocytes Of Ciona Intestinalis (Tunicata, Ascidiacea), Ayla Öber
Granular Haemocytes Of Ciona Intestinalis (Tunicata, Ascidiacea), Ayla Öber
Turkish Journal of Zoology
The granular blood cells of Tunicates are distinguished in six different types according to the granular density, amount, localization and other cytoplasmic characteristics. They're compared with those of invertebrates and Amphioxus which is the closest group to the Tunicates.
Differentiation Of Brain Neurosecrotory Cells Depending On Ecdysteroid Content Of Haemolymph During 5 Th. Instar Larval Stage Of Silkworm, Bombyx Mori, Osman Parlak, Güler Ünal
Differentiation Of Brain Neurosecrotory Cells Depending On Ecdysteroid Content Of Haemolymph During 5 Th. Instar Larval Stage Of Silkworm, Bombyx Mori, Osman Parlak, Güler Ünal
Turkish Journal of Zoology
In this study, the differentiation in the lateral neurosecretion cells of pars intercerebralis of brain, depending on the different ecdysteroid contents which was determined in the hemolymph of silkworm by radioimmunoassay has been studied using light microscopy. The brains of silkworms in the time of low and high hemolymph ecdysteroid content were fixed in Bouin solution, and the cross sections were stained with PAF after dehidratation. Results shown that the density of fine secretion granulles increased in the cytoplasm of neurosecration cells just before the increase of ecdysteroid content in hemolymph. It was also observed that the ecdysteroid content in …
The Effect Of Water On Growth, Food Consumption, Feces Quantity, Digestive Activity And Glycogen Level Of Gryllus Bimaculatus (Orthoptera: Gryllidae), Ati̇la Yanikoğlu
The Effect Of Water On Growth, Food Consumption, Feces Quantity, Digestive Activity And Glycogen Level Of Gryllus Bimaculatus (Orthoptera: Gryllidae), Ati̇la Yanikoğlu
Turkish Journal of Zoology
In this study, the effect of water on growth (wet weight gain), food consumption, feces quantity, digestive activity and glycogen level of Gryllus bimaculatus female adults was investigated by doing the experiments of feeding and starvation. Wheat bran was given for feeding. All parameters were found to be significantly higher in insects feeding with water than those feeding without water. A significant difference did not occur in mean wet weight and glycogen level in insects either feeding without water or starved for one week. At the end of the experimental period, a wet weight gain (43%) was observed only in …
A Study On The Flesh Productivity And Standard Method For Collecting Of Helix Lucorum Linnaeus, 1758, M. Zeki̇ Yildirim, M. Rüştü Özen, Mustafa Ünlüsayin, Hayri̇ Gülyavuz
A Study On The Flesh Productivity And Standard Method For Collecting Of Helix Lucorum Linnaeus, 1758, M. Zeki̇ Yildirim, M. Rüştü Özen, Mustafa Ünlüsayin, Hayri̇ Gülyavuz
Turkish Journal of Zoology
In this study that has been verified at the Eğirdir environs, Helix lucorum which is one of the edible terrestrial snail species in Turkey, and a standard method of collecting snail samples for consumption were investigated. In the area of study, it was observed that individuals begin to reproduce at the second week of February and that they are spawninig during March-May when the climate is mild. It was also determined that the minimum shell length of individuals is 22 mm, and that shell diameter is 31 mm, and that weight is 10 g which were measured during reproducing period. …
New, Little-Known And Characteristic Ciliate Speciesfrom The Apsheron Coast Of The Caspian Sea, Ilham Alekperov, Esmira Asadullayeva
New, Little-Known And Characteristic Ciliate Speciesfrom The Apsheron Coast Of The Caspian Sea, Ilham Alekperov, Esmira Asadullayeva
Turkish Journal of Zoology
Three new, five little-known and five characteristic ciliate species are described and figured. All these species were found in the psammon and periphyton along the Apsheron coast of the Caspian Sea (Azerbaijan). The descriptions are based on the observations of living specimens and the analysis of slides impregnated with silver.
Effects Of Salinity On The Accumulation Of Copper In Liver, Gill And Muscle Tissues Of Tilapia Nilotica, Murat Karakoç
Effects Of Salinity On The Accumulation Of Copper In Liver, Gill And Muscle Tissues Of Tilapia Nilotica, Murat Karakoç
Turkish Journal of Zoology
In this study, effects of 5, 10, 15 and 20 NaCl concentrations on the accumulation of copper in liver, gill and muscle tissues of Tilapia niloticawere studied over experimental periods of 1, 7, 15 and 30 days at concentrations of 0.1, 1.0 and 10.0 ppm copper in the medium. The highest levels of copper were found in the liver and the lowest values in the muscle tissue in a given NaCl and metal concentration. Accumulation of copper in the liver tissue, however, increased with increasing copper concentrations in the medium in all salt concentrations. The increase of the NaCl concentration …
The Effects Of Toxic Aluminium And Low Ph On Gill Development Of Rainbow Trout ( Oncorhynchus Mykiss, Walbaum) Larvae., Meti̇n Çalta
The Effects Of Toxic Aluminium And Low Ph On Gill Development Of Rainbow Trout ( Oncorhynchus Mykiss, Walbaum) Larvae., Meti̇n Çalta
Turkish Journal of Zoology
In this study, the gill development of rainbow trout ( Oncorhynchus mykiss Walbaum) larvae exposed to toxic aluminium (200 ?g/L), those exposed low pH (4.5) alone and those exposed to both for 30 days were investigated under scanning electron microscopy. General appearance of gills, filament and lamella lengths and the number of lamellae per filament were determined in order to evaluate the effects of these toxicants on gill development. In addition, the death rates and general conditions of larvae were observed. In larvae exposed to low pH alone and in those exposed to aluminium alone, a slight thickness in the …
A Study Of The Taxonomy And Karyology Of Meriones Persicus (Blanford, 1875) (Mammalia: Rodentia) In Turkey, Nuri̇ Yi̇ği̇t, Ercüment Çolak
A Study Of The Taxonomy And Karyology Of Meriones Persicus (Blanford, 1875) (Mammalia: Rodentia) In Turkey, Nuri̇ Yi̇ği̇t, Ercüment Çolak
Turkish Journal of Zoology
In this study, three live specimens captured around Oltu ( Erzurum ) were examined in terms of their morphological and karyological features. The diploid number of the chromosomes was 2n= 42, the fundamental number FN= 78 and the number of autosomal arms was FNa= 74. The X and Y chromosomes were both submetacentric in M. persicus. It was determined that the small white supraorbital spot found between the eyes and ears of the pelage, as well as karyological traits, distinguish Meriones persicus from Meriones tristrami. On the basis of morphological similarity, it was concluded that these taxa were sibling species.
A Note On The Examination Of Morphometric Differentiation Among Fish Populations: The Truss System, Cemal Turan
A Note On The Examination Of Morphometric Differentiation Among Fish Populations: The Truss System, Cemal Turan
Turkish Journal of Zoology
Identifying intraspecific units or stocks of a species with unique morphological characters enables a better management of these subunits of species and ensurs perpetuations of the resources. Multivariate morphometry has been commonly used to investigate the discreteness and interrelationships of stocks within a species. Different types of body measurements have been traditionally used to charecterise stocks. However these measurements have recently been criticised because there are several biases and weaknesses inherent in traditional characters. As an alternative, a new system of morphometric measurements called The Truss Network System has been increasingly used for stock identification. In this review a computer-originated …
Karyological Analysis And Body Proportion Of Catfish (Clariidae, Clarias Lazera, Valenciennes, 1840) In The Göksu Delta, Turkey, Serap Ergene Gözükara, Ender Portakal, Arzu Karahan
Karyological Analysis And Body Proportion Of Catfish (Clariidae, Clarias Lazera, Valenciennes, 1840) In The Göksu Delta, Turkey, Serap Ergene Gözükara, Ender Portakal, Arzu Karahan
Turkish Journal of Zoology
Chromosome analysis of Clarias lazera living in wet lands located in Göksu River (Göksu Delta) was accomplished by modified air-drying. Clarias lazera was found to have 18 metacentric, 26 submetacentric and 12 acrocentric chromosomes. Twenty-five systematically important meristic and morphometric characters of Clarias lazera in the Göksu Delta were examined for 49 specimens. In order to clarify the taxonomic status of Clarias lazera, which is not originally from this region, karyological analyses were carried out, and certain some morhometric characteristics were investigated.
A Morphological Investigation On The Anuran Species Of The Reşadiye (Datça) Peninsula (Anura: Bufonidae, Hylidae, Ranidae), Cemal Varol Tok
A Morphological Investigation On The Anuran Species Of The Reşadiye (Datça) Peninsula (Anura: Bufonidae, Hylidae, Ranidae), Cemal Varol Tok
Turkish Journal of Zoology
In this survey the amphibian fauna of Reşadiye (Datça) Peninsula, which has not been studied in detail so far, is given. No urodelan species has been encountered during the present work; but the presence of four different species belonging to three anuran families is established. Bufo bufo, Bufo viridis, Hyla arborea and Rana ridibunda specimens were collected from two, five, three and six different localities respectively, establishing the status of the peninsula's anura fauna. A total of 125 adult and two juvenile specimens were studied morphologically. Some observations on the ecological and biological characteristics of the anurans are also given.
Specimens Of Ophisops Elegans (Sauria:Lacertidae) Collected From Ihlara Valley (Aksaray), Kurtuluş Olgun, Cemal Varol Tok
Specimens Of Ophisops Elegans (Sauria:Lacertidae) Collected From Ihlara Valley (Aksaray), Kurtuluş Olgun, Cemal Varol Tok
Turkish Journal of Zoology
In this study, a total of 30 specimens (15 , 15 ) collected from Ihlara Valley were examined for their taxonomic characteristics. The Ihlara population was compared with two nearby populations (Kayseri and Karaman), which are included in the distribution range of Ophisops elegans centralanatoliae. When pholidosis, coloration and pattern features were taken into consideration it was concluded that the Ihlara population can be included in the species Ophisops elegans centralanatoliae.
Species And Subspecies Of The Genus Aphanius Nardo 1897 (Pisces: Cyprinodontidae) In Turkey, Rudolf H. Wi̇ldekamp, Fahretti̇n Küçük, Mustafa Ünlüsayin, Wi̇m Van Neer
Species And Subspecies Of The Genus Aphanius Nardo 1897 (Pisces: Cyprinodontidae) In Turkey, Rudolf H. Wi̇ldekamp, Fahretti̇n Küçük, Mustafa Ünlüsayin, Wi̇m Van Neer
Turkish Journal of Zoology
The Turkish species of the Cyprinodontiform genus Aphanius Nardo 1827 are described. The naming used follows Wildekamp (1993) (1) as the latest available revision. Information is given on morphology, sexual dimorphism, colouration and distribution, as well as remarks on taxonomy, nomenclature, distribution, variability and conservation. Comments are given on the Lazara (1995) (2) revalidation of Lebias as a distinct genus. It is shown that Valenciennes (1846) (3) is the first revisor of Lebias, and not Lazara, and that Aphanius should be maintained as a genus. The taxon Aphanius chantrei (Galliard 1895) is regarded as a junior synonym of Aphanius danfordii …
The First Record Of Epistylis Niagaraeon Astacus Leptodactylusin A Crayfish Rearing Unit, Cip, Muzaffer Mustafa Harlioğlu
The First Record Of Epistylis Niagaraeon Astacus Leptodactylusin A Crayfish Rearing Unit, Cip, Muzaffer Mustafa Harlioğlu
Turkish Journal of Zoology
In this study, the presence of the ectocommensal Epistylis niagarae on the carapace, abdomen, walking legs, uropod, telson, antennae and antennulae of crayfish was observed.
Erythrocyte Sizes Of Some Anurans From Turkey, Mehmet Kutsay Atatür, Hüseyi̇n Arikan, İ. Ethem Çevi̇k
Erythrocyte Sizes Of Some Anurans From Turkey, Mehmet Kutsay Atatür, Hüseyi̇n Arikan, İ. Ethem Çevi̇k
Turkish Journal of Zoology
The erythrocyte sizes of some anurans from Turkey (Rana ridibunda, Bufo bufo, Bufo viridis, Pelobates syriacus, Bombina bombina, Hyla arborea) were established utilizing blood smears stained with Wright's stain. The largest erythrocytes were found in R. ridibunda, the widest in B. bombina and the smallest in P. syriacus.
Liocarcinus Depurator (Linnaeus, 1758) And Brachynotussexdentatus(Risso, 1827) (Decapoda, Brachyura), Two New Records For The Turkish Black Sea Fauna, A. Suat Ateş
Turkish Journal of Zoology
The present study is on 2 Brachyura species, collected by a scuba diver during investigations on the decapod fauna of the Sinop Peninsula shores of the Western Black Sea region, Turkey, between June, 1995, and July, 1996. Liocarcinus depurator (Linnaeus, 1758) and Brachynotus sexdentatus (Risso, 1827), which was found in the study area, has not been reported previously from Turkish Black Sea coastal waters.
The Taxonomic Status Of Triturus Vulgaris(Linnaeus, 1758) Populations In Western Anatolia, Turkey, Kurtuluş Olgun, İbrahi̇m Baran, Cemal Varol Tok
The Taxonomic Status Of Triturus Vulgaris(Linnaeus, 1758) Populations In Western Anatolia, Turkey, Kurtuluş Olgun, İbrahi̇m Baran, Cemal Varol Tok
Turkish Journal of Zoology
A total of 179 (97 males, 82 females) Triturus vulgaris specimens collected during the breeding season from Western Anatolia (Efes, Ayvacık, Lapseki, Karacabey, Gemlik) and European Turkey (Bolayır) was examined. The morphological and the statistical evaluations showed that the Western Anatolian (except Efes) and the Thrace populations are similar. The West Anatolian populations, therefore, should be included in the nominate subspecies, T.v. vulgaris. The Efes specimens were found to be different from specimens of Ayvacik, Lapseki and Gemlik especially in terms of body measurements. The explanation of the taxonomic status of the Efes population will be possible with the material …
A Study On Vormela Peregusna Guldenstaedt, 1770 (Mammalia: Carnivora) In Turkey, Şaki̇r Özkurt, Mustafa Sözen, Nuri̇ Yi̇ği̇t, Ercüment Çolak
A Study On Vormela Peregusna Guldenstaedt, 1770 (Mammalia: Carnivora) In Turkey, Şaki̇r Özkurt, Mustafa Sözen, Nuri̇ Yi̇ği̇t, Ercüment Çolak
Turkish Journal of Zoology
Karyological and morphological characteristics of a female Vormela peregusna captured from Gönen (Balıkesir) were examined. The diploid number of chromosomes (2n) 38, fundamental number (FN) 72, and the number of autosomal arms (NFa) 68. The X chromosome is medium-sized submetacentric. The morphological and karyological evaluations showed that Turkish peregusna is similar to Vormela peregusna syriacus from Syria.
Age Variations In Microtus Guentheri Danford And Alston, 1880 (Mammalia: Rodentia) In Turkey, Mustafa Sözen, Ercüment Çolak, Nuri̇ Yi̇ği̇t, Şaki̇r Özkurt
Age Variations In Microtus Guentheri Danford And Alston, 1880 (Mammalia: Rodentia) In Turkey, Mustafa Sözen, Ercüment Çolak, Nuri̇ Yi̇ği̇t, Şaki̇r Özkurt
Turkish Journal of Zoology
The skull, teeth, phallus and bacula of Microtus guentheri specimens raised in the laboratory were investigated at different stages of postnatal development. The most of the cranial measurements attained those of adults on day 60. There were determined to be some morphological differences between the skulls of young and adult voles. The incisors and the molars began to erupt at 3 and 6 days, respectively. It was shown that there was no difference in respect to the phallic and bacular morphology between young and adults except for size. The proximal bacula became larger during the period between juvenile life and …
Effects Of A Snake Venom And Some Hypometabolic Agents On The Substandard Gas-Oxygen Metabolism In Mice, Sh. I. Allamuratov, R. N. Ahmerov, K. T. Almatov, I. K. Kazakov
Effects Of A Snake Venom And Some Hypometabolic Agents On The Substandard Gas-Oxygen Metabolism In Mice, Sh. I. Allamuratov, R. N. Ahmerov, K. T. Almatov, I. K. Kazakov
Turkish Journal of Zoology
A lethal dose of the snake Vipera lebetina venom decreases the standard gas-oxygen metabolism of mice approximately threefold while its nonlethal dose does so twofold. The same effects on the gas-oxygen metabolism of mice were noted for lethal and nonlethal doses of aminooxyacetate (blocker of aminotransferases), catacin (antihypoxant), halothane (anesthetic agent) and serotonin (hypometabolic agent). It is concluded that the organism's physiologically reversible substandard metabolic (or vital hypometabolic) limit induced by different intoxications is approximately two times as low, and the irreversible substandard metabolic (or lethal hypometabolic) limit is three times as low as the level of the standard metabolism.
Some Ultrastructural Observations On Cellular Interaction Between Trophectoderm And Uterine Epithelium During Preimplantation In Rat, Ramazan Demi̇r, İsmai̇l Üstünel, Necdet Demi̇r
Some Ultrastructural Observations On Cellular Interaction Between Trophectoderm And Uterine Epithelium During Preimplantation In Rat, Ramazan Demi̇r, İsmai̇l Üstünel, Necdet Demi̇r
Turkish Journal of Zoology
The blastocystic trophoblast cells consist of different types of cells according to their structural architecture and their functional specialisation: a) supporting, preventing and feeding functions; b) signalization, polarisation, and depolarisation functions between blastocyst and uterine; c) immunological acceptance or rejection and secreting functions. The aim of this study was to investigate the ultrastructure of cellular interaction between mural trophoblast/trophectoderm cells of blastocyst and uterine epithelium in rat. Tissue samples obtained from rats on day 5 of pregnancy were studied ultarstructurally. In contrast to the polar trophoblast cells exhibiting degeneration according to implantataion progress, some mural trophoblast cells play an important …
Investigation Of The Selectivity Of Multifilament And Monofilament Gill Nets On Pike Perch (Stizostedion Lucioperca (L., 1758)) Fishing In Lake Beyşehir, İsmet Balik
Turkish Journal of Zoology
In this study, carried out in Lake Beyşehir, the selectivity of multifilament and monofilament gill nets used for pike perch fishing were investigated. Multifilament gill nets with 5 differenet mesh sizes and monofilament gill nets with 6 different mesh sizes were used during experimental fishing from October 1994 ve May 1996. According to the results, the common selection factor of multifilament gill nets was calculated to be 4.67 and 4.70 for monofilament gill nets.
The Effects Of Methionine Supplementation To Soybean Meal (Sbm)-Based Diets On The Growth And Whole Body-Carcass Chemical Composition Of Tilapia (T. Zillii), Abdurrahman Polat
The Effects Of Methionine Supplementation To Soybean Meal (Sbm)-Based Diets On The Growth And Whole Body-Carcass Chemical Composition Of Tilapia (T. Zillii), Abdurrahman Polat
Turkish Journal of Zoology
The effects of supplementing soybean meal-based diets with methionine on the growth and carcass-whole body chemical composition of T. zillii were studied during a 62-day feeding trial. A control diet prepared for T. zillii was supplemented with five different levels of free methionine, 0.5%, 1%, 1.5%, 2% and 2.5% (the same amounts of ?-cellulose were removed). At the end of the study, the best growth rate and FCR were determined in the group fed a diet supplemented with 0.5% methionine (total 1.38% methionine+cystine). Statistically significant effects of methionine supplementation on whole body protein content were determined (p