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Articles 1981 - 2010 of 2109
Full-Text Articles in Zoology
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.
Effects Of Gut Sediment Contents On Heavy Metal Levels In The Amphipod Corophium Volutator(Pallas), Levent Bat, Dave Raffaelli̇
Effects Of Gut Sediment Contents On Heavy Metal Levels In The Amphipod Corophium Volutator(Pallas), Levent Bat, Dave Raffaelli̇
Turkish Journal of Zoology
Concentrations of copper, zinc and cadmium were determined in Corophium volutator (with and without gut contents) exposed for 4 and 10 days to contaminated sediment. Significant differences were observed in metal concentrations among individuals, where gut contents were removed and those there they were left intact. On the other hand, the concentrations of these metals in Corophium were always high when no time was given for amphipods to depurate their guts. Therefore, it is recommended that either depuration in seawater or removal of the gut should be carried out before analysing amphipods for metal levels.
Fauna Of The Subfamily Ichneumoninae (Hymenoptera, Ichneumonidae) Of Azerbaijan With New Records, Azer Abulfaz Oghlu Aliyev
Fauna Of The Subfamily Ichneumoninae (Hymenoptera, Ichneumonidae) Of Azerbaijan With New Records, Azer Abulfaz Oghlu Aliyev
Turkish Journal of Zoology
This paper presents information about 103 species of the subfamily ichneumoninae. 10 species of them were included in the Azerbaijan fauna, 25 in the Caucasian fauna and 65 in the Transcaucasian fauna for the first time. They belong to 6 tribes and 36 genera. Their distribution, hosts and biotopes were noted.
The Taxonomy And Ecology Of Mauremys Caspica Rivulatavalenciennes, 1833 (Testudinata: Bataguridae) And Testudo Graeca Ibera Pallas, 1811 (Testudinata: Testudinidae) On Resadiye (Datça) Peninsula, Cemal Varol Tok
Turkish Journal of Zoology
In this survey, the tortoise and turtle fauna of Resadiye (Datça) Peninsula, which has not previously been studied in detail, is given. Mauremys caspica rivulata and Testudo graeca ibera specimens were collected as museum material or released after their measurements were taken, from four and nine localities respectively, establishing the status of the peninsula's testudine fauna. A total of 30 adult and eight juvenile specimens were studied morphologically. Observations on the ecological and biological characteristics of the testudines are also given.
Characterization And Structure-Function Studies Of Human Liver Flavin Monooxygenase Isozyme 3 (Fmo3), Orhan Adali, Richard M. Philpot
Characterization And Structure-Function Studies Of Human Liver Flavin Monooxygenase Isozyme 3 (Fmo3), Orhan Adali, Richard M. Philpot
Turkish Journal of Zoology
The activity of the flaving-containing monooxygenase (FMO EC 1.14.13.8) can be modulated by a number of nitrogen-containing compounds in a manner that is both isoform and effector-dependent. We showed that the direction (activation or inbihiton) and extent of modulation can also be dependent on substrate concentration. The native human liver FMO3 and arg 433 mutant FMO3 catalyze the methimazole reaction with similar Km values. However, the mutant FMO3-catalyzed reaction was affected differently by high concentration of imipramine, imipramine causing inhibition of activity. Our results suggest that the response of FMO3 to imipramine involves a distribution of compounds between two sites …
Some Biological Aspects Of Penaeid Shrimps Inhabiting Yumurtalık Bight In İskenderun Bay (North-Eastern Mediterranean), Meti̇n Kumlu, Dursun Avşar, O. Tufan Eroldoğan, Nuri̇ Başusta
Some Biological Aspects Of Penaeid Shrimps Inhabiting Yumurtalık Bight In İskenderun Bay (North-Eastern Mediterranean), Meti̇n Kumlu, Dursun Avşar, O. Tufan Eroldoğan, Nuri̇ Başusta
Turkish Journal of Zoology
The species composition, size frequency distribution and length/weight relationships for each sex, size at first sexual maturity, and spawning seasons of the commercially important shrimp species inhabiting Yumurtalik Bight of the Nort-eastern Mediterranean were studied. Two penaeid shrimp species, Penaeus semisulcatus and Metapenaeus stebbingi, dominated the catches. Only a few individuals of Metapenaeus monoceros were captured during the study. The minimum size at first maturity was estimated to be 130 mm total length (TL) for P. semisulcatus and 55-60 mm TL for M. stebbingi. The size at which 50% of the population is mature is 36 mm carapace length (CL) …
Gonadal Maturation And Spawning Of Penaeus Semisulcatus(Penaeidae: Decapoda), Mevlüt Aktaş, Meti̇n Kumlu
Gonadal Maturation And Spawning Of Penaeus Semisulcatus(Penaeidae: Decapoda), Mevlüt Aktaş, Meti̇n Kumlu
Turkish Journal of Zoology
The effects of eyestalk ablation on maturation, moulting and spawning in Penaeus semisulcatus were investigated in this study. Twelve males and 12 eyestalk-ablated and 12 non-ablated, all individually marked females were stocked into a 12-ton maturation tank. All the ablated females moulted in 9.08±1.68 days and first spawning occurred 16.75±3.41 days following eyestalk ablation. While all the ablated females spawned, producing an average of 177.000 ±133.340 eggs, only three non-ablated females spawned, producing average of 23.216±16.957 eggs during a period of 45 days (P0.05). Average nauplii production per female was 81.574±55.126 for ablated and 13.397±11.535 for non-ablated ones (P
Two New Sex Determining Factors ( M V , F D ) In Housefly, (Musca Domestica) Populations In Turkey, Şükran Çakir
Two New Sex Determining Factors ( M V , F D ) In Housefly, (Musca Domestica) Populations In Turkey, Şükran Çakir
Turkish Journal of Zoology
In most strains of the common housefly, Musca domestica, sex is genetically determined by the presence or absence of a Y chromosome with a dominant male determining factor, M. Standard trains have an XX-XY mechanism. In certain laboratory and natural populations, however, neither females nor males have the Y chromosome. These non-standard populations have autosomal mechanisms for sex determination. In the present study, the existence of two new autosomal sex determining factors, M V and F D , in housefly populations in Turkey was determined.
Competition Between Strains With Autosomal And Standardsex-Determining Mechanisms In The Housefly (Muscidae), Şükran Çakir, Aykut Kence
Competition Between Strains With Autosomal And Standardsex-Determining Mechanisms In The Housefly (Muscidae), Şükran Çakir, Aykut Kence
Turkish Journal of Zoology
Experimental cages started with a mixture of flies at three different ratios (1:9, 5:5, 9:1) from populations having heterosomal and autosomal sex-determining mechanisms were cytogenetically examined over six generations at two different temperatures (25 °C and 35 °C). In general, there was an increase in the frequency of XX males in all competitive population cages. Abnormal testes and intersex appearance, frequent X chromosome aneuploidies and deviation from a 1:1 sex ratio were observed.
Seasonal Variation Of Pseudophyllidean Cestode, Diphyllobothriumspp. Infection In Cyclops Strenuus Abyssorum (Copepoda) In Loch Lomond, Mustafa Dörücü
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 …