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Articles 8131 - 8160 of 10522

Full-Text Articles in Zoology

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 Jan 1999

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. …

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Effect Of Human Disturbance On Small Mammal Communities In Itasca State Park, Minnesota, Nancy L. Staus, Kathleen Conforti, Leslie N. Clapper, Jennifer A. Longhenry, C. C. Schoenbauer, Michael S. Rentz, John R. Tester Jan 1999

Effect Of Human Disturbance On Small Mammal Communities In Itasca State Park, Minnesota, Nancy L. Staus, Kathleen Conforti, Leslie N. Clapper, Jennifer A. Longhenry, C. C. Schoenbauer, Michael S. Rentz, John R. Tester

Journal of the Minnesota Academy of Science

We determined effects of different levels of human disturbance on small mammal richness and relative abundance from live-trapping data obtained in Itasca State Park in northwestern Minnesota. We developed a quantitative measure of human disturbance based on disturbance units and trapped small mammals on three study sites, each reflecting a different level of disturbance. Our data revealed that small mammal diversity decreased with increasing human disturbance. Amount of ground cover and litter depth also appeared to be important in explaining differences in the demographic patterns of small mammals among sites.

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New, Little-Known And Characteristic Ciliate Speciesfrom The Apsheron Coast Of The Caspian Sea, Ilham Alekperov, Esmira Asadullayeva Jan 1999

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.

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Effects Of Salinity On The Accumulation Of Copper In Liver, Gill And Muscle Tissues Of Tilapia Nilotica, Murat Karakoç Jan 1999

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 …

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The Effects Of Toxic Aluminium And Low Ph On Gill Development Of Rainbow Trout ( Oncorhynchus Mykiss, Walbaum) Larvae., Meti̇n Çalta Jan 1999

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 …

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A Study Of The Taxonomy And Karyology Of Meriones Persicus (Blanford, 1875) (Mammalia: Rodentia) In Turkey, Nuri̇ Yi̇ği̇t, Ercüment Çolak Jan 1999

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.

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A Note On The Examination Of Morphometric Differentiation Among Fish Populations: The Truss System, Cemal Turan Jan 1999

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 …

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Occurrence And Reproduction Of The Alabama Shad, Alosa Alabamae Jordan And Evermann, In The Ouachita River System Of Arkansas, Thomas M. Buchanan, Josh Nichols, Don Turman, Colton Dennis, Stuart Woolridge, Brett Hobbs Jan 1999

Occurrence And Reproduction Of The Alabama Shad, Alosa Alabamae Jordan And Evermann, In The Ouachita River System Of Arkansas, Thomas M. Buchanan, Josh Nichols, Don Turman, Colton Dennis, Stuart Woolridge, Brett Hobbs

Journal of the Arkansas Academy of Science

The anadromous Alabama shad, Alosa alabamae, has drastically declined in abundance in recent decades throughout its historic range and has previously been reported in Arkansas from only five localities. Three of those locality records are pre- 1900. Sampling by seine in the Ouachita River drainage system of southern Arkansas in July and August of 1997 and 1998 produced more than 300 juvenile A. alabamae from two localities on the Little Missouri River and four localities on the Ouachita River. One record of an adult Alabama shad, taken on 4 April1997 by an angler below Remmel Dam on the Ouachita River, …

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Revised List Of Arkansas Terrestrial Mollusks With Notes On The Geographic Distribution Of Species, Brian F. Coles, Gerald E. Walsh Jan 1999

Revised List Of Arkansas Terrestrial Mollusks With Notes On The Geographic Distribution Of Species, Brian F. Coles, Gerald E. Walsh

Journal of the Arkansas Academy of Science

A revised list of of Arkansas terrestrial mollusks is presented, based on the authors' collections, incorporating data from the scientific literature and taking into account recent changes in taxonomy and species concepts. 144 species are recorded for Arkansas, of which 127 represent the autochthonous fauna of the state. The biogeographical position of Arkansas is reflected in its land mollusks, i.e., approximately 40% of Arkansas species are also widely distributed in the United States east of the Rocky Mountains, 12% are more widely distributed to the north, 11% are typical of the Gulf Coastal Plain, 14% form a "Mid Western" assemblage …

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Karyological Analysis And Body Proportion Of Catfish (Clariidae, Clarias Lazera, Valenciennes, 1840) In The Göksu Delta, Turkey, Serap Ergene Gözükara, Ender Portakal, Arzu Karahan Jan 1999

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.

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A Morphological Investigation On The Anuran Species Of The Reşadiye (Datça) Peninsula (Anura: Bufonidae, Hylidae, Ranidae), Cemal Varol Tok Jan 1999

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.

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Specimens Of Ophisops Elegans (Sauria:Lacertidae) Collected From Ihlara Valley (Aksaray), Kurtuluş Olgun, Cemal Varol Tok Jan 1999

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.

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Species And Subspecies Of The Genus Aphanius Nardo 1897 (Pisces: Cyprinodontidae) In Turkey, Rudolf H. Wi̇ldekamp, Fahretti̇n Küçük, Mustafa Ünlüsayin, Wi̇m Van Neer Jan 1999

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 …

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The First Record Of Epistylis Niagaraeon Astacus Leptodactylusin A Crayfish Rearing Unit, Cip, Muzaffer Mustafa Harlioğlu Jan 1999

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.

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Clinostomum Marginatum (Yellow Grub) Metacercaris In Black Bass From The Caddo River In West Arkansas, James J. Daly Jr., H. Michael Matthews, Randal J. Keller, James J. Daly Jan 1999

Clinostomum Marginatum (Yellow Grub) Metacercaris In Black Bass From The Caddo River In West Arkansas, James J. Daly Jr., H. Michael Matthews, Randal J. Keller, James J. Daly

Journal of the Arkansas Academy of Science

Seventy-two bass (Micropterus-spp.), mostly smallmouth, were collected from three areas of the Caddo River in west Arkansas and examined for the presence of Clinostomum marginatum metacercariae. Prevalence, mean abundance, and abundance for all fish were 68%, and 4.2 ±6.5, and 30, respectively. Fish from the upstream area near the headwaters were more heavily infested than those from further downstream. A gill/total body larval ratio of seven, was found for bass from another Arkansas stream, was examined as a predictor for total Clinostomum populations instream bass. Using the formula gill parasites X seven divided by N(72), a value of 3.3 was …

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Arkansas Gray Fox Fur Price-Harvest Model Revisited, Peta Elsken-Lacy, Amy M. Wilson, Gary A. Heidt, James H. Peck Jan 1999

Arkansas Gray Fox Fur Price-Harvest Model Revisited, Peta Elsken-Lacy, Amy M. Wilson, Gary A. Heidt, James H. Peck

Journal of the Arkansas Academy of Science

Peck and Heidt (1985) proposed a linear model that demonstrated that for gray fox (Urocyon cinereoargenteus) in Arkansas; total fur harvests from 1966-1982 were highly correlated with mean pelt values. Single variable models using linear regression analysis of current season pelt values (CSPV) and previous season pelt values (PSPV) were designed to predict total fur harvests. These models demonstrated high correlations (r =0.93 and 0.89, respectively). In the past 15 years, markets for fur have undergone many perturbations within Arkansas and overseas resulting in great changes in mean pelt prices. In an attempt to evaluate the continued performance of the …

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Status Of Three Plethodontid Salamanders (Genus Plethodon) From The Ouachita National Forest Of Southwest Arkansas, Stanley E. Trauth, J. D. Wilhide Jan 1999

Status Of Three Plethodontid Salamanders (Genus Plethodon) From The Ouachita National Forest Of Southwest Arkansas, Stanley E. Trauth, J. D. Wilhide

Journal of the Arkansas Academy of Science

A three-year field investigation was initiated in 1996 to update previous information on the local abundance and distribution of three salamanders of the genus Plethodon (P. caddoensis, P.fourchensis, and P. ouachitae); these salamanders are found within a five-county area of the Ouachita National Forest in southwestern Arkansas. Plethodon fourchensis was most numerous at three sites in Polk County; a total of 18 specimens was found. Searching for Plethodon fourchensis was successful following moderate-to-heavy precipitation but only in selected habitats on Fourche and Irons Forks mountains. The preferred habitats of P. caddoensis were talus-covered slopes and wet ravines consisting of mostly …

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The Mayfly Newsletter, Peter M. Grant Jan 1999

The Mayfly Newsletter, Peter M. Grant

The Mayfly Newsletter

The Mayfly Newsletter is the official newsletter of the Permanent Committee of the International Conferences on Ephemeroptera.

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Seasonal Variation Of Pseudophyllidean Cestode, Diphyllobothriumspp. Infection In Cyclops Strenuus Abyssorum (Copepoda) In Loch Lomond, Mustafa Dörücü Jan 1999

Seasonal Variation Of Pseudophyllidean Cestode, Diphyllobothriumspp. Infection In Cyclops Strenuus Abyssorum (Copepoda) In Loch Lomond, Mustafa Dörücü

Turkish Journal of Zoology

The seasonal variation in natural levels of infection with procercoids of pseudophyllidean cestodes, Diphyllobothrium spp, and the abundance of Cyclops strenuus abyssorum (Copepoda) were studied in Loch Lomond, Scotland, From March 1993, to February 1994. The prevalence of infected copepods was found to increase with the temperature of the water, a peak occurring in June, while relatively low levels were recorded between December and March. The population density of C. strenuus abyssorum also exhibited seasonal variation, being higher during the warmer months. Water temperature in Loch Lomond, near Rowardennan, ranged from 3.2 to 16°C. The lowest water temperature was recorded …

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Erythrocyte Sizes Of Some Anurans From Turkey, Mehmet Kutsay Atatür, Hüseyi̇n Arikan, İ. Ethem Çevi̇k Jan 1999

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.

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Liocarcinus Depurator (Linnaeus, 1758) And Brachynotussexdentatus(Risso, 1827) (Decapoda, Brachyura), Two New Records For The Turkish Black Sea Fauna, A. Suat Ateş Jan 1999

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.

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A Study On Mustela Nivalis Linnaeus, 1766 (Mammalia: Carnivora) In Turkey, Ercüment Çolak, Nuri̇ Yi̇ği̇t, Mustafa Sözen, Şaki̇r Özkurt Jan 1999

A Study On Mustela Nivalis Linnaeus, 1766 (Mammalia: Carnivora) In Turkey, Ercüment Çolak, Nuri̇ Yi̇ği̇t, Mustafa Sözen, Şaki̇r Özkurt

Turkish Journal of Zoology

In this study, five specimens of Mustela nivalis collected from five localities in Turkey were examined based on karyological, morphological, bacular and some ecological aspects. The karyotype of M. nivalis has 2n=42, NFa=72 and FN=76. The baculum seems to be similar to that of specimens of M. nivalis dinniki from Erivan (Armenia).

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Checklist Of Tabanidae (Diptera) From Turkey, Ali̇ Yavuz Kiliç Jan 1999

Checklist Of Tabanidae (Diptera) From Turkey, Ali̇ Yavuz Kiliç

Turkish Journal of Zoology

After a review of the literature on the Tabanidae fauna of Turkey, it was found that 156 species and 12 subspecies have been reported. Twelve of the species are from the subfamily Pangoninae, 19 species and 2 subspecies are from the subfamiy Chrysopsinae and 125 species and 10 subspecies are from the subfamily Tabaninae.

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The Taxonomic Status Of Triturus Vulgaris(Linnaeus, 1758) Populations In Western Anatolia, Turkey, Kurtuluş Olgun, İbrahi̇m Baran, Cemal Varol Tok Jan 1999

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 …

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A Study On Vormela Peregusna Guldenstaedt, 1770 (Mammalia: Carnivora) In Turkey, Şaki̇r Özkurt, Mustafa Sözen, Nuri̇ Yi̇ği̇t, Ercüment Çolak Jan 1999

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.

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Age Variations In Microtus Guentheri Danford And Alston, 1880 (Mammalia: Rodentia) In Turkey, Mustafa Sözen, Ercüment Çolak, Nuri̇ Yi̇ği̇t, Şaki̇r Özkurt Jan 1999

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 …

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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 Jan 1999

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.

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Some Ultrastructural Observations On Cellular Interaction Between Trophectoderm And Uterine Epithelium During Preimplantation In Rat, Ramazan Demi̇r, İsmai̇l Üstünel, Necdet Demi̇r Jan 1999

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 …

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Investigation Of The Selectivity Of Multifilament And Monofilament Gill Nets On Pike Perch (Stizostedion Lucioperca (L., 1758)) Fishing In Lake Beyşehir, İsmet Balik Jan 1999

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.

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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 Jan 1999

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

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