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Articles 1861 - 1890 of 2109

Full-Text Articles in Zoology

Compensatory Growth In Sea Bass ( Dicentrarchus Labrax), Sea Bream ( Sparus Aurata) And Rainbow Trout ( Oncorhynchus Mykiss), Temel Şahi̇n, Bi̇lal Akbulut, Muharrem Aksungur Jan 2000

Compensatory Growth In Sea Bass ( Dicentrarchus Labrax), Sea Bream ( Sparus Aurata) And Rainbow Trout ( Oncorhynchus Mykiss), Temel Şahi̇n, Bi̇lal Akbulut, Muharrem Aksungur

Turkish Journal of Zoology

The effects of a period of starvation and subsequent refeeding on the weight and length of sea bass, sea bream and rainbow trout reared at 17%o salinity and at different temperatures were investigated. The fish were starved for 3 weeks and then fed ad libitum by hand for 3 weeks in the 3 periods studied. The study provided evidence of the adaptation of the fish to starvation followed by what may be termed compensatory growth once feeding was resumed. The length changes of the fish indicate that the weight gains were due to grojth rather than increases in gut fat …


The Acar Oid Mites From The Nests Of The Common Vole (Microtus Arvalis) (Rodentia) Of The Lesser Caucasus Within Azerbaijan, Edmi̇la Ali̇evna Abdullaeva Jan 2000

The Acar Oid Mites From The Nests Of The Common Vole (Microtus Arvalis) (Rodentia) Of The Lesser Caucasus Within Azerbaijan, Edmi̇la Ali̇evna Abdullaeva

Turkish Journal of Zoology

The results are given of a study on Acaroid mites collected in the summer (July-August) from the nests of the common vole (Microtus arvalis) in the subalpine zone in Shahbuz, Lachin, Keebajar and Kedabek regions of Azerbaijan. Under the specific conditions of the high mountain subalpine meadows of Azerbaijan, the fauna of acaroid mites in the nests of rodents is sufficiently diverse. The presented species list includes 19 species belonging to 2 families and 11 genera. In this region, with its extreme climatic conditions, the nests, with a stable microclimate, serve as a concentration and survival site for the acaroid …


Geographic Variations And Taxonomic Status Of Miniopterus Schreibersi (Kuhl, 1819) In Turkey (Chiroptera: Vespertilionidae), İrfan Albayrak, Şule Coşkun Jan 2000

Geographic Variations And Taxonomic Status Of Miniopterus Schreibersi (Kuhl, 1819) In Turkey (Chiroptera: Vespertilionidae), İrfan Albayrak, Şule Coşkun

Turkish Journal of Zoology

This study is a taxonomical revision of 257 specimens of Miniopterus schreibersi (Kuhl, 1819) collected from Turkey between 1974 and 1994. A total of 30 external and cranial measurements and weights and the ages of the specimens were determined. Diagnostic characters, habitat, and measurements of subspecies were recorded. The specimens collected in Turkey were evaluated by comparison with the nominate form distributed nearby, Miniopterus schreibersi pallidus Thomas, 1907, and synonyms. It was determined that both the nominate form and Miniopterus schreibersi pallidus exist in Turkey.


On Specimens Of Rana Ridibunda Pallas, 1771 (Anura: Ranidae) Collected From Isıklı Lake (Çivril-Denizli), Abi̇di̇n Budak, Cemal Varol Tok, Di̇nçer Ayaz Jan 2000

On Specimens Of Rana Ridibunda Pallas, 1771 (Anura: Ranidae) Collected From Isıklı Lake (Çivril-Denizli), Abi̇di̇n Budak, Cemal Varol Tok, Di̇nçer Ayaz

Turkish Journal of Zoology

In this survey, 17 adult (3 , 14 ) Rana ridibunda specimens were investigated morphologically. The morphological characteristics of the Işıklı Lake specimens are in accordance with those given for R. r. caralitana (1). Furthermore, the distribution range of R. r. caralitana has now been extended.


Lessepsian Fishes Spreading Along The Coasts Of The Mediterranean And The Southern Aegean Sea Of Turkey, Hati̇ce Torcu, Savaş Mater Jan 2000

Lessepsian Fishes Spreading Along The Coasts Of The Mediterranean And The Southern Aegean Sea Of Turkey, Hati̇ce Torcu, Savaş Mater

Turkish Journal of Zoology

The taxonomy and biological characters of 22 Lessepsian fishes living on the coasts of the Eastern Mediterranean and Aegean Sea were examined and 8 species were determined to have commercial importance. Of these, Upeneus moluccensis and Saurida undosquamis have become economic fishes of the Eastern Mediterranean trawl fisheries, having significant stocks. The species previously misidentified as Upeneus asymmetricus was determined to be Upeneus pori. It has been pointed out that new species can be added to the recorded ones by the consequent influx of Red Sea biota into the Levant.


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

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

Turkish Journal of Zoology

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


Reproduction Characteristics Of Thinlip Grey Mullet, Liza Ramada(Risso 1826) Inhabiting Akgöl-Paradeniz Lagoons (Göksu Delta), Serap Ergene Gözükara Jan 2000

Reproduction Characteristics Of Thinlip Grey Mullet, Liza Ramada(Risso 1826) Inhabiting Akgöl-Paradeniz Lagoons (Göksu Delta), Serap Ergene Gözükara

Turkish Journal of Zoology

In order to determine the reproduction characteristics of Liza ramada, a fish of economical importance, the GSI, egg diameter, sex maturity, age and sex ratio were examined in 228 specimens caught periodically, between February 1992 and July 1994 in Akgöl-Paradeniz Lagoon. According to the GSI % and egg diameter, the reproduction period of Liza ramada was determinedto be November and December. The lowest GSI % obtained for Liza ramada was 4.99 % in February and the highest values were16.67 % in November and 11.67 % in December. The average egg diameter of Liza ramadaranged from 0.15 to 0.69 mm. It …


The Distribution And Fishing Of Two Mediterranean Eledone Spp. (Octopoda: Cephalopoda) In The Aegean Sea, Alp Salman, Tuncer Katagan, Ali̇ Cemal Gücü Jan 2000

The Distribution And Fishing Of Two Mediterranean Eledone Spp. (Octopoda: Cephalopoda) In The Aegean Sea, Alp Salman, Tuncer Katagan, Ali̇ Cemal Gücü

Turkish Journal of Zoology

The spatial distributions of Eledone cirrhosa (Lamarck, 1798) and Eledone moschata (Lamarck, 1798) were examined based on four seasonal trawl surverys carried out between 1991-1992 covering 20-500 meters of the Turkish and international waters in the Aegean Sea. It was found that E. cirrhosa inhabits all depth ranges examined in the northern part, but it was seldom observed in the south. E. moschata, on the other hand, has a basin-wide distribution and solely inhabits the upper 200-meter depth range.


A Preliminary Study On The Reproduction Of The Rabbitfish (Siganus Rivulatus (Forsskal, 1775)) In The Northeastern Mediterranean, Hacer Yeldan, Dursun Avşar Jan 2000

A Preliminary Study On The Reproduction Of The Rabbitfish (Siganus Rivulatus (Forsskal, 1775)) In The Northeastern Mediterranean, Hacer Yeldan, Dursun Avşar

Turkish Journal of Zoology

This study was carried out to identify some aspects of the reproductive cycle of the rabbitfish ( Siganus rivulatus) inhabiting the northeastern Mediterranean. For this reason, monthly sampling was conducted between February 1995 and June 1996, and a total of 473 specimens were used. By using the monthly changes in the values of the gonadosomatic index (GSI) and Condition Factor (K), it was found that their reproduction takes place during July and August. The mean diameter of ripe gonadal eggs was 0.44 mm; and mean fecundity and its standard deviation was found to be 434761±181006. Fecundity-total length, fecundity-total weight and …


Genetics And Some Aging-Related Mechanisms, Şükran Çakir Jan 2000

Genetics And Some Aging-Related Mechanisms, Şükran Çakir

Turkish Journal of Zoology

Aging can be defined as the time-dependent decline of physiological functions of an organism. Aging, a multifactorial process composed of both genetic and environmental components, is a highly complex biologic phenomenon of great importance. The details of the mechanisms leading to aging are not yet known. All changes in the process of aging have a cellular basis, and perhaps aging should be studied, fundamantally, at the cellular level under defined and controlled environmental conditions. Some genetic approaches have promise for the understanding of this multifactorial process. In this review, some causal hypotheses related to oxidative damage, caloric restriction, mitochondrial mutations, …


Genetic Structure Of Mediterranean Sea Turtle Populations, Yakup Kaska Jan 2000

Genetic Structure Of Mediterranean Sea Turtle Populations, Yakup Kaska

Turkish Journal of Zoology

The mitochondrial DNA (mtDNA) control region sequences of two species ( Caretta caretta and Chelonia mydas) of sea turtles from the Mediterranean were analysed using samples from Northern Cyprus. Only one single haplotype for each species was detected. These results were compared with other published work regarding the genetic structure of sea turtle populations. These results suggest that the Mediterranean population of sea turtles were separated from their Atlantic relatives in the recent past. In order to protect these endangered sea turtles and to preserve the genetic diversity of the sea turtle population in the Mediterranean, individual nesting sites must …


Histological Study In The Digestive Tract On Larval Development Of Rainbow Trout ( Oncorhynchus Mykiss, Walbaum, 1792), Mustafa Sarieyyüpoğlu, Aydin Gi̇rgi̇n, Si̇bel Şi̇mşek Jan 2000

Histological Study In The Digestive Tract On Larval Development Of Rainbow Trout ( Oncorhynchus Mykiss, Walbaum, 1792), Mustafa Sarieyyüpoğlu, Aydin Gi̇rgi̇n, Si̇bel Şi̇mşek

Turkish Journal of Zoology

In this study the development of the digestive tract of newly hatched rainbow trout ( Oncorhynchus mykiss) larvae were examined. The digestive tract was attached to the anus a few hours after hatching. On the second day their mouths were open and the differentiation in the esophagus started. Mucosal folds contained a large quantity of cubic epithelium and goblet cells. Goblet cells were stained positively with Alcian blue and also stained negatively with P.A.S. The wall of the esophagus consisted of a circular muscle layer and a thin tunica serosa. It was possible to see a thin longitudinal muscle layer …


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.


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 …


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.


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 …


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.


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.


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.


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.


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.


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 …


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.


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.


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. …


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 …


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.


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.


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 …


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.