Aynur Lök

Ege University · Department of Aquaculture

The comparison of population density of Holothuria tubulosa (Gmelin, 1790) and Holothuria polii (Delle Chiaje, 1823) between exploited and non-exploited areas in the Aegean Sea coast of Türkiye Türkiye'nin Ege Denizi kıyılarında Holothuria tubulosa (Gmelin, 1790) ve Holothuria polii (Delle Chiaje, 1823) popülasyon yoğunluğunun av yapılan ve yapılma...

European oyster (Ostrea edulis L. 1758) in Uzbek-Urla (Izmir) in this study examined individuals placed in Augmentation systems to determine the growth and survival rates of their spats. Temperature, salinity, total particulate matter (TPM) (particulate organic-POM and particulate inorganic-PIM) and chlorophyll-a values were recorded from water par...

Pinna nobilis, commonly known as the fan mussel, is an endemic and endangered species of the Mediterranean Sea. Using specimens collected monthly from March 2008 to February 2009, this study examines the gonadal development and biochemical composition in the adductor muscle of the fan mussel in relation to environmental parameters, such as chloroph...

Spat recruitment of a large bivalve species endemic to the Mediterranean Sea and naturally found at İzmir, Turkey (Urla, Karantina Island), the fan mussel Pinna nobilis (Linnaeus, 1758), has been researched. The study was carried out between May and October 2012. The aim of this study was to determine the spat recruitment of the fan mussel. Collect...

Rapid determination of the genetic differences between some oyster samples observed in the Aegean Sea that were assumed as an invasive species and domestic oyster (Ostrea edulis, Linnaeus 1758) using RAPD (Random Amplified Polymorphic DNA)- PCR (Polymerase Chain Reaction) markers was aimed in this study. In this regard, domestic species samples and...

Several bivalve species produce byssus threads to provide attachment to substrates, with mechanical properties highly variable among species. Here, we examined the distal section of byssal threads produced by a range of bivalve species (Mytilus edulis, Mytilus trossulus, Mytilus galloprovincialis, Mytilus californianus, Pinna nobilis, Perna perna,...

Sea urchins which collected from Muğla-Ören site area were measured biometrical. Then body compartment dissected seperately. Gonadosomatic and body indices are worked out by different methods (Method 1= Wet gonad weight / total wet weight * 100. Method 2= Wet gonad weight / eviscerated test weight * 100. Method 3= Dried gonad weight /total dried bo...

Foraging behaviors of juvenile Hexaplex trunculus (Linnaeus, 1758), a predatory snail, preying on the Mediterranean mussel Mytilus galloprovincialis were investigated. To understand the mechanisms of the prey-predator relationship between young forms of these species and assess the foraging capabilities of the snails, size selection and attacktype...

Pearls are known as the oldest jewellery on earth are being collected and economically evaluated for 4000 years. The innovation of a method “pearl culture with nucleus implantation” by Japanese Mikimoto was very important development because pearls were obtaining until the early 1920s. Today, saving pearl oysters by prohibition of hunting and incre...

Growth rate of different size groups of mussels, Mytilus galloprovincialis Lamarck, 1819 in Iskele-Urla (Bay of Izmir). The culture of different size groups (six) of the mussel seeds were investigated from August, 1996 to July 1997 in Iskele (Urla-Izmir). Shell length, width, height and live weight of different size of mussels were monitored during...

The reproductive cycle of the flat oyster, Ostrea edulis Linnaeus, 1758, in Homa Lagoon, Izmir Bay, Turkey was examined from August 2008 to July 2009. Gonad samples were analysed histologically in order to determine the sex ratio and gonad development stage. Overall, the sex ratio was recorded as 2.2% female, 42.6% male, 37% hermaphrodite and 17.9%...

The objective of present study is to determine the gut and gonad yield of Paracentrotus lividus populations occuring along Aegean Sea coastline and to evaluate of the environmental conditions on the gonad indices variability. To achieve this, samples were gathered during twelve months and biometric measurements were done. The wet gonad index peaked...

18.Ulusal Su Ürünleri Sempozyumu, Ege Üniversitesi Su Ürünleri Fakültesi, 1-4 Eylül 2015, İzmir/Türkiye

Kasım 2013 ile Aralık 2014 tarihleri arasında Özbek Urla’da Avrupa istiridyesi (Ostrea edulis L. 1758) spatlarının büyüme ve yaşama oranlarını belirlemek amacıyla, aylık ölçümler yapılmıştır. Yıl boyunca su parametrelerinden sıcaklık, tuzluluk, toplam partikül madde (TPM) (organik-POM ve inorganik-PIM) ve klorofil-a değerleri kaydedilmiştir. Çalışm...

This study reports about ontogenetic allometry of body components for the most common and abundant echinoderm species (Paracentrotus lividus) in the Aegean Sea (western Turkey). Paracentrotus lividus was collected monthly from the coast of Foca for 12 months and biometric parameters were measured (spine test diameter, spine test height, test diamet...

Spawning, phases of embryonic development, intracapsular feeding mechanism and development mode of banded murex Hexaplex trunculus (Linnaeus, 1758) were examined using specimens from the Aegean Sea. In addition, the numbers and characteristics of non-viable nurse eggs during different phases were examined in relation to the development phases of vi...

The present study is carried out in Kilya Bay (in the Dardanelles) between February 2002 and February 2004. The purpose of this study was to determine the most suitable collector material, time to collect mussel seed, and the growth rate. In the first three months of the study, different collector materials (net rope, polypropylene rope, sisal rope...

İnciler güzelliği ve parlaklığıyla tarih boyunca insanlığın ilgisini çekmiş, değerli bir mücevher olarak kullanılmıştır. Çinliler ilk olarak 13. yüzyılın başlarında küçük Budha heykellerini tatlı su midyelerinin içerisine yerleştirmişler ve etraflarının sedef katmanıyla çevrelendiğini görmüşlerdir. Japon Mikimoto’ nun 20. yüzyılın başlarında nukleu...

In the current study, commercially valuable penaeid shrimp, Melicertus kerathurus, were attained approximately monthly in the Izmir Bay, southern Aegean Sea from May 2004 to April 2005. For each specimen, we measured body length, body weight and ovarian weight, and calculated gonadosomatic indices (GSI). GSI values results pointed out that the GSI...

The growth and survival of 5, 7, 9, and 11-mm juvenile blood cockle (Anadara inaequivalvis) cultured in suspended nets in Sufa Lagoon, Izmir, Turkey, were investigated. Shell length, width, and thickness and total weight were measured monthly during May 2007-May 2008. Temperature was measured every 6 h. Salinity, chlorophyll a, particulate organic...

The growth and survival of fan mussel (Pinna nobilis, Linnaeus) juveniles, from natural spatfall, were compared in two groups (large and small size) in Karantina Island Izmir, Turkey, between December 2004 and April 2006. Total live weight, shell length, width and thickness of fan mussel were measured monthly during the study period. Small (32 mm)...

Influence of microalgal feeding with Isochrysis galbana and Chlorella sp. on the growth and survival rate of larvae of European flat oyster, Ostrea edulis, was investigated. Larvae were reared with four food regimes: I. galbana, Chlorella sp., mixture of both and unfed for 16 days. After 16 days, it was observed that the larvae reached the umbo sta...

Growth and survival of fl at oyster, Ostrea edulis, juveniles of diff erent sizes (15 mm, 20 mm, 25 mm, 30 mm, 35 mm and 40 mm) from natural spatfall were studied in suspended culture in Mersin Bay Izmir, Turkey from April 2002 to August 2003. Environmental parameters such as temperature, salinity, chlorophyll-a, total particulate matter (TPM), pH...

The study regarding the annual pattern of Pinna nobilis settlement in Karantina Island (Izmir Bay, Turkey) was conducted using artificial polyethylene-mesh bag collectors (onion bag). The samples were collected by a SCUBA diver at intervals of 4 weeks, also replacing the collectors during 12 months at 8-m depth. In addition, environmental parameter...

Considering the filtration capacity of mussels to qualitative particle selection, our study focused directly on ingested species by assessing mussel stomach content of various size classes (1-5 cm) over a year (August 97-June 98) rather than monitoring seawater samples. Different size of mussels (1, 2, 3, 4, 5 cm in length) was sampled monthly from...

Between 2006 and 2007, growth of the pearl oyster, Pinctada radiata, was measured in four size lenght groups (15, 20, 25 and 30 mm) of oyster over 12 months in Mersin Bay (Izmir). Temperature, total particulate matter (TPM) and cholorophyll-a was monitored during the study. There is no published data about growth of the rayed pearl oyster, Pinctada...

In this study, the settlement and growth of the Mediterranean mussel, Mytilus galloprovincialis, was monitored from September 2002 to February 2004 in Kilya Bay, Dardanelles. Water temperature ranged between 8.3-25°C, the average chlorophyll-a was 0.70 μgL-1. The mussel abundances on the ropes in Kilya Bay, indicated the highest density of mussels...

A study of the gametogenic cycle of the carpet shell clam, Tapes decussatus, was undertaken in the inside and outside of Çakalburnu Lagoon, Izmir Bay, Aegean Sea from August 2006 to July 2007. Histological evidence showed that gametogenesis of T. decussatus continued throughout the year and six stages of gonadal development were observed in two sit...

The gametogenic cycle and biochemical composition of the carpet shell clam Ruditapes decussatus, in Mersin Bay, Aegean Sea, were determined by monthly sampling from January 2004 to December 2004. Microscopic examination showed that gametogenesis had begun in January, when the water temperature and chlorophyll a value were 14 degrees C and 3.49 mu g...

Knowledge of the gametogenic cycle and biochemical composition of commercially valuable species is important in aquaculture. Monthly variations in meat yield, gonadal development and biochemical composition of the bivalve Tapes decussatus were studied from January 2002 to December 2002 in the Sufa Lagoon in relation to environmental conditions. His...

This paper reports on the larvae development of the flat oyster, Ostrea edulis (Linnaeus, 1758), from veliger to pediveliger stage. Adult oysters were induced to spawn by thermal stimulation and large amounts of veliger larvae were obtained for study. Veliger larvae were cultured in 180-l bins at a density of 3 larvae/ml. Larvae, reared at 20±2°C a...

Kimi kültürlerde Tanrıların gözyaşları, Ay'ın simgesi, kimilerinde saflığın ve temizliğin işareti olarak kabul edilen inciler, çok eski tarihlerden bu yana insan yaşamının bir parçası olmuşlardır. 1920’li yıllarda nucleus aşılama tekniğinin bulunmasıyla, inci kültürü gelişmiş ve istenilen talebi karşılayabilir hale gelmiştir. Böylelikle doğal kayna...

İnci istiridyesi yetiştiriciliği ve inci kültürü son yıllarda birçok ülkede başarıyla yapılmaktadır. İnci hasadına kadar geçen uzun dönem içerisinde gerçekleştirmesi gereken birçok önemli aşama mevcuttur. Bunlardan en önemlisi de yetiştiriciliğin devamını belirleyecek olan spat toplama aşamasıdır. Çalışma Urla Karantina Adası çevresinde İzmir’ in 3...

The carpet shell clam (Tapes decussatus Linnaeus, 1758) is a candidate species for aquaculture development in Turkish waters. Our study aimed to assess the efficiency of three different methods (i.e., net, box and fenced ground) to maximize clam production. Two different net materials (hard plastic net and polyamide net) were tested in the net meth...

The growth and mortality rate of di¡erent size of mussels, Mytilus galloprovincialis, were compared in Mersin bay, Izmir. Mussel sampling was performed on a monthly basis over 1 year, together with hyrobiological parameters. Water temperature, salinity, chlorophyll a, total particulate matter (TPM) and particulate organic carbon (POC) were determin...

The growth and mortality rate of different size of mussels, Mytilus galloprovincialis, were compared in Mersin bay, Izmir. Mussel sampling was performed on a monthly basis over 1 year, together with hyrobiological parameters. Water temperature, salinity, chlorophyll a, total particulate matter (TPM) and particulate organic carbon (POC) were determi...

The study was carried out in Kilya (Poyraz) Bay in Dardanelles between November 2002 and December 2003. Net rope I and net rope II were hung in November and December 2002, respectively. The number of mussels was counted as 2630 seeds/100 cm2 between November-December and 5019 mussel seed/100 cm2 between and December-January, respectively. The numbe...

The study was carried out in Kilya (Poyraz) Bay in Dardanelles between November 2002 and December 2003. Net rope I and net rope II were hung in November and December 2002, respectively. The number of mussels was counted as 2630 seeds/100 cm2 between November-December and 5019 mussel seed/100 cm2 between and December-January, respectively. The numbe...

The growth and survival of juvenile carpet shell clams, Tapes decussatus, planted in autumn (October-April) and spring (April-October) in Sufa Lagoon near Izmir, Turkey, were compared. Clams of 20.39±0.24 mm were sown in October (Group I) and clams of 20.43±0.23 mm were sown in April (Group II). Seedlings were sown in plastic boxes at a density of...

The growth and survival rates of four size classes (10, 15, 20, and 25 mm) of bearded horse mussels (Modiolus barbatus) grown in net bags in Mersin Bay, Izmir, were assessed from May 2001 to May 2002. Temperature ranged 14-23 degrees C, average chlorophyll a was 3.34 +/- 0.35 mu g/l, average total particulate matter 12.43 +/- 0.68 mg/l, and average...

The sea urchins Arbacia lixula and P. lividus are common on shallow subtidal reefs and live together in the Mediterranean. But P. lividus has been favoured by consumers because of its distinctive aroma and good taste. The gonads are eaten fresh in sauces, soups, creams and omelettes. The development of gonads of P. lividus is its maximum in Februar...

Oyster recruitment was monitored in Karantina Island near Izmir, Turkey, from May to October 1999. The aim of the study was to determine the recruitment pattern for six months and the most suitable time to collect oyster spat from nature. Oyster and mussel shells were used as substrates in spat collectors. Five groups of each type of collector were...

Rope culture of mediterranean mussels (Mytilus galloprovincialis L.1819) in the Dardanelles. The present study was conducted in Kilya (Poyraz) Bay, Dardanelles between May 2002-May 2003. At the beginning of study, mortality rate was high (% 8.34) due to handling stress. Higher mortality rates encountered during summer were minimum in the winter. A...

In this study, meat yield of different size groups of mussels were determined in Kilya Bay - Dardanelles, between April 2002 – March 2003. In all mussel groups, meat yield was the highest in May 2002. However, minimum meat yield value was determined in October 2002 and November 2002. Significantly relation was found between meat yield and chlorophy...

Seasonal gonadal changes were observed histologically in samples of carpet shell clams (Tapes decussatus L., 1758) collected from Çakalburnu Lagoon of Izmir Bay between January and October 2001. Five stages of gonadal development were identified. In January, Stage0 (inactive) and Stage I were observed, with the majority (70%) of the animals in the...

Bu çalışma, Mayıs 2002 – Haziran 2003 tarihleri arasında Çanakkale Boğazına bağlı Kilya (Poyraz) Koyunda yapılmıştır. Mayıs 2002’de suya bırakılan ağ ip 1 kollektöründen bir sonraki ay yapılan örneklemede 2045 midyenin, Haziran 2002’de suya bırakılan ağ ip 2 kollektöründe ise 8813 midyenin tutunduğu görülmüştür. Midyelerde üremenin yıl boyunca deva...

In this study, the effect of different dilution rates on the rotifer Brachionus plicatilis was investigated. For this purpose, the rotifer was cultured in three 50 l cylinder-conic tanks for 12 days, the cultures being fed with bakerÕs yeast (Saccharomyces cereviscea). The production of the rotifer and growth rate of the cultures were determined at...

In this study, the effect of different dilution rates on the rotifer Brachionus plicatilis was investigated. For this purpose, the rotifer was cultured in three 50 l cylinder-conic tanks for 12 days, the cultures being fed with bakerÕs yeast (Saccharomyces cereviscea). The production of the rotifer and growth rate of the cultures were determined at...

Seasonal gonadal changes were observed histologically in samples of carpet shell clams (Tapes decussatus L., 1758) collected from Çakalburnu Lagoon of Izmir Bay between January and October 2001. Five stages of gonadal development were identified. In January, Stage0 (inactive) and Stage I were observed, with the majority (70%) of the animals in the...

Juvenile mussels collected from the wild were fed with five different marine microalgae species (Chlorella sp., Tetraselmis suecica, Dunaliella tertiolecta, Chaetoceros calcitrans and Nannochloropsis oculata) for five months. According to the results, significantly higher growth in length and weight were obtained with diets of Tetraselmis suecica a...

Özet: Bu çal›flmada farkl› suland›rma oranlar›n›n rotifer kültürü üzerine etkileri araflt›r›lm›flt›r. Bu amaçla, rotiferler 12 gün boyunca üç adet 50 lt'lik silindir-konik tanklarda ekmek mayas› (Saccharomyces cereviscea) ile beslenerek kültüre al›nm›flt›r. Rotifer younluu 200 birey/ml'ye ulaflt›¤›nda farkl› suland›rma oranlar› (% 10, % 20, % 30) u...