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    A Preliminary Survey on Settlement and Recruitment Patterns of Mediterranean Mussel (Mytilus galloprovincialis) in Dardanelles, Turkey
    (Kafkas Univ, Veteriner Fakultesi Dergisi, 2010) Yildiz, Harun; Lok, Aynur; Acarli, Sefa; Serdar, Serpil; Kose, Aysun
    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 degrees C, the average chlorophyll-a was 0.70 mu gL(-1). The mussel abundances on the ropes in Kilya Bay, indicated the highest density of mussels in November 2002 (14184 ind. 0.25 m(-1)) and March 2003 (15485 ind. 0.25 m(-1)) and lowest in February 2004 (3713 ind. 0.25 m(-1)). Settlement was significantly different between samplings (P<0.05). At the end of 18 months. 91.36% of spat on rope was smaller than 2.8 mm. The highest percentage of length class was 1.5-2.79 mm with 40.26%. Even though mussel size reached a maximum of 55.7 mm, their density was very low, 0.20%.
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    Comparative Growth, Survival and Condition Index of Flat Oyster, Ostrea edulis (Linnaeus 1758) in Mersin Bay, Aegean Sea, Turkey
    (Kafkas Univ, Veteriner Fakultesi Dergisi, 2011) Acarli, Sefa; Lok, Aynur; Kucukdermenci, Aysun; Yildiz, Harun; Serdar, Serpil
    Growth and survival of flat oyster, Ostrea edulis, juveniles of different 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 were monitored each sampling time. Temperature was between 13.8 degrees C (December 2002) and 24.5 degrees C (July and August 2002). Average chlorophyll-a, TPM and pH were 1.7 +/- 0.64 mu g l(-1), 0.01311+/-0.00224 mg l(-1) and 7.65+/-0.22, respectively. Shell length increment for each size groups (from small to large) was determined as 49.99, 43.39, 39.10, 33.11, 39.36 and 25.67 mm, respectively. The smallest group was growth faster than others (P < 0.05). Significant differences in survival rates between size groups occurred (highest: 60% for 15.mm and lowest: 12.8% for 35 mm) (P < 0.05). Condition index and meat yield which showed many variations throughout the study changed from 2.65% to 5.11% and from 6.65% to 12%, respectively.
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    Comparative growth, survival and condition index of flat oyster, Ostrea edulis (Linnaeus 1758) in Mersin Bay, Aegean Sea, Turkey
    (Veteriner Fakultesi Dergisi, 2011) Acarli, Sefa; Lok, Aynur; Küçükdermenci, Aysun; Yildiz, Harun; Serdar, Serpil
    Growth and survival of flat oyster, Ostrea edulis, juveniles of different 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 were monitored each sampling time. Temperature was between 13.8°C (December 2002) and 24.5°C (July and August 2002). Average chlorophyll-a, TPM and pH were 1.7±0.64 ?g l-1, 0.01311±0.00224 mg l-1 and 7.65±0.22, respectively. Shell length increment for each size groups (from small to large) was determined as 49.99, 43.39, 39.10, 33.11, 39.36 and 25.67 mm, respectively. The smallest group was growth faster than others (P<0.05). Significant differences in survival rates between size groups occurred (highest: 60% for 15.mm and lowest: 12.8% for 35 mm) (P<0.05). Condition index and meat yield which showed many variations throughout the study changed from 2.65% to 5.11% and from 6.65% to 12%, respectively.
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    Comparison of Isochrysis galbana and Chlorella sp microalgae on growth and survival rate of European flat oyster (Ostrea edulis, Linnaeus 1758) larvae
    (Natl Inst Science Communication-Niscair, 2011) Acarli, Sefa; Lok, Aynur
    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 stage with a mean size in length 220 +/- 4.12 mu m and 219 +/- 5.76 mu m (initial length, 159 mu m) (P>0.05). Larvae were fed on I. galbana and mixture diet. At this stage, survival rate was 30% and 24%, respectively (P>0.05). Growth and survival rates for the feeding regimes were significantly higher than the Chlorella sp. and unfed groups (P<0.05).
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    Culture of Fan Mussel (Pinna nobilis, Linnaeus 1758) in Relation to Size on Suspended Culture System in Izmir Bay, Aegean Sea, Turkey
    (Kafkas Univ, Veteriner Fakultesi Dergisi, 2011) Acarli, Sefa; Lok, Aynur; Yigitkurt, Selcuk; Palaz, Mustafa
    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) and large (73 mm) size groups of fan mussel individuals reached 140.25 +/- 10.46 mm and 154.36 +/- 16.12 mm in length and 64.64 +/- 17.98 g and 99.74 +/- 30.53 g in live weight, respectively. Significant differences were found in increases of shell length and live weight. Environmental parameters such as chlorophyll-a, seawater temperature, salinity, particulate organic matter (POM) and particulate inorganic matter (PIM) were determined during each sampling period. Shell length increase was affected by chlorophyll-a and PIM. However, increases in shell length did not correlate with temperature and POM. Survival rates for small and large groups were 93% and 100%, respectively.
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    Culture of fan mussel (pinna nobilis, linnaeus 1758) in relation to size on suspended culture system in izmir bay, aegean sea, Turkey
    (Veteriner Fakultesi Dergisi, 2011) Acarli, Sefa; Lok, Aynur; Yigitkurt, Selcuk; Palaz, Mustafa
    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) and large (73 mm) size groups of fan mussel individuals reached 140.25±10.46 mm and 154.36±16.12 mm in length and 64.64±17.98 g and 99.74±30.53 g in live weight, respectively. Significant differences were found in increases of shell length and live weight. Environmental parameters such as chlorophyll-a, seawater temperature, salinity, particulate organic matter (POM) and particulate inorganic matter (PIM) were determined during each sampling period. Shell length increase was affected by chlorophyll-a and PIM. However, increases in shell length did not correlate with temperature and POM. Survival rates for small and large groups were 93% and 100%, respectively.
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    Gamogenetic cycle, condition index and meat yield of the Noah's Ark shell (Arca noae Linnaeus, 1758) from Gerence Bay, Aegean Sea Turkey
    (Ege Univ, Fac Fisheries, 2018) Acarli, Sefa; Lok, Aynur; Acarli, Deniz; Kucukdermenci, Aysun
    Gamogenetic cycle, the condition index and meat yield of the Arca noae Linnaeus, 1758 (Noah's ark shell) were followed in Gerence Bay (Aegean Sea, Turkey), between August 2009 and July 2010. Temperature, salinity, chlorophyll-a, particulate organic and inorganic matter were monitored during the sampling period. According to histological observation, inactive stage was determined as 100% in September. The spawning period was observed through the year except September, with a peak from April to June. Sex ratios were not equal and females were dominant during the study period (2: 1). Meat yield, condition index and gonad index reveal a positive relationship between each other (P=0.05). Among environmental parameters, inverse relationship was only found between particulate inorganic matter and reproduction (P=0.05).
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    Growth and mortality of Mediterranean mussel Mytilus galloprovincialis Lam., 1819, in relation to size on longline in Mersin Bay, Izmir (Turkey-Aegean Sea)
    (Blackwell Publishing, 2007) Lok, Aynur; Acarli, Sefa; Serdar, Serpil; Kose, Aysun; Yildiz, Harun
    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 determined. Average chlorophyll a, TPM and POC values were 3.88 +/- 1.62 mu g L-1, 13.12 +/- 3.68 mg L-1 and 252 +/- 121.89 mu g L-1 respectively. Initial mean lengths of mussels for each size group were 10 mm (9.91 +/- 0.25 mm), 20 mm (20.14 +/- 0.29 mm), 30 mm (30.66 +/- 0.21 mm), 40 mm (40.14 +/- 0.21 mm), 50 mm (50.62 +/- 0.21 mm), 60 mm (59.77 +/- 0.21 mm) and 70 mm (69.47 +/- 0.62 mm). Maximum growth in length occurred during the spring-summer months. The annual length increments of mussel size groups were 46.22, 41.42, 30.3, 28.03, 20.63, 16.34 and 12.03 mm from small to large size groups respectively. Small mussels grew faster than large mussels and reached commercial size at the same time. Mortality was < 5% for all groups at the end of the experiment.
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    Growth and Survival of Anadara inaequivalvis (Bruguiere, 1789) in Sufa Lagoon, Izmir, Turkey
    (Israeli Journal Of Aquaculture-Bamidgeh, 2012) Acarli, Sefa; Lok, Aynur; Yigitkurt, Selcuk
    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 matter, particulate inorganic matter, and total particulate matter were followed every two weeks. Mean increases were 16.68 and 13.46 mm and 3.62 and 5.74 g for small and large spat, respectively. Length increased significantly faster in small cockle than in large cockle (p < 0.05). Survival was 65% and 100% in small and large cockles, respectively (p < 0.05). Von Bertalanffy growth parameters L infinity (27 mm) and k (0.28/month) showed that growth performance (phi' = 3.22) was greater than for other species in the natural population. Slope b from the length-weight relationship was 3.098 +/- 0.115, indicating significantly better allometric growth (p <= 0.05). Results indicate that A. inaequivalvis is a good candidate for suspended aquaculture in the Sufa Lagoon, Turkey.
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    Growth and survival rates of carpet shell clam (Tapes decussatus Linnaeus, 1758) using various culture methods in Sufa (Homa) Lagoon, Izmir, Turkey
    (Elsevier Sci Ltd, 2007) Serdar, Serpil; Lok, Aynur; Kose, Aysun; Yildiz, Harun; Acarli, Sefa; Goulletquer, Philippe
    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 method trials. Conducted over 1 year between October 2001 and October 2002, an initial calibrated clam population, characterized by a 26.25 +/- 0.035 mm shell length and 3.85 +/- 0.06 g total wet weight was sampled on a monthly basis to carry out the experiments. By the end of the rearing cycle, clams reached 34.13 +/- 0.38 mm and 9.09 +/- 10.27 g in shell length and total wet weight, respectively. Significant differences in shell length and total wet weight among culture methods (P < 0.05) were reported. Both maximum growth and total wet weight, as well as survival rate (64%) were obtained using the hard plastic net method. Those overall results were likely due to both limited algae accumulation and crab predation when using hard plastic net. Therefore, this method appears the most suitable to develop further larger experimental clam aquaculture trials. Additional studies required to develop clam culture in Turkish waters are discussed. (c) 2007 Elsevier B. V. All rights reserved.
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    Growth and survival rates of different size classes of black mussel (Mytilus galloprovincialis Lamarck, 1819) at two culture systems in Dardanelles
    (Ege Univ, 2005) Yildiz, Harun; Lok, Aynur
    This study was conducted in Kilya Bay, Dardanelles between May 2002 - May 2003. Growth rate of different size groups of mussels (10 +/- 2, 20 +/- 2, 30 +/- 2, 40 +/- 2, 50 +/- 2, 60 +/- 2, 70 +/- 2 mm) in rope system were shown higher than net system. Significantly relation was found amoung growth rate of mussel water temperature and chlorophyll-a (p<0.05). Growth rate of two system decreased from small size groups to bigger size groups. Survival rate of mussels in net system were found better than rope system (p<0.05). Survival rate of bigger size groups were determined higher than small size groups in both system (p<0.05).
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    Harmful Algal Blooms (HABs) and Black Mussel Mytilus galloprovincialis (Linnaeus, 1758) Culture in Izmir Bay (Iskele-Urla)-Turkey: Preliminary Results on the Annual Feeding Cycle Using a Qualitative Approach
    (Central Fisheries Research Inst, 2010) Lok, Aynur; Metin, Gulnur; Acarli, Sefa; Goulletquer, Philippe
    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 the sides of fish cage floats in Urla-Izmir. Stomach contents were analyzed under microscope and different plankton species were grouped taxonomically. Bacillariophycea, Dinophyceae, Oxyphceae, Euglenophyceae as phytoplanktonic species were observed in the stomach contents of mussels as well as zooplanktonic species including Ciliata, Cladocera, Copepod, bivalve and gastropod larvae. Over the sampling period, according to the Bray-Curtis similarity test mussels' stomach for all sizes was of similar content except in August and October.
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    Meat yield of mussels (Mytilus galloprovincialis Lamarck, 1819) in different size groups in Kilya Bay - Dardanelles
    (Ege Univ, 2005) Yildiz, Harun; Lok, Aynur
    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 chlorophyll-a ( p<0.05). Significantly important differences were not found between mussel size groups ( p>0.05). Since water temperature and chlorophyll-a amount are suitable level during May - July in Kilya Bay, mussel harvest is suggested from this area.
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    Mussel (Mytilus galloprovincialis Lamarck, 1819) spat settlement and growth performances on artificial collectors in Dardanelles
    (Ege Univ, 2005) Yildiz, Harun; Lok, Aynur; Serdar, Serpil; Acarli, Sefa; Kose, Aysun
    This study was conducted in Kilya (Poyraz) Bay, Dardanelles between May 2002 - June 2003. Net rope 1 was hung in May 2002, net rope 2 was hung in June 2002. After one month, attachment of mussel spat on net rope 1, 2 were 2045 individual and 8813 individual in June 2002 and July 2002, respectively. It was determined that reproduction of mussel continued all over the year. But mussels which were pediveliger and postlarvae stages survival rate was determined too low in summer season. After one year, mussel length was found between 30 - 50 mm in net rope 1 collector. On the other hand, mussel length was measured between 20 - 30 mm in net rope collector.
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    PRELIMINARY SPAT SETTLEMENT OF FAN MUSSEL PINNA NOBILIS LINNAEUS 1758 ON A MESH BAG COLLECTOR IN KARANTINA ISLAND (EASTERN AEGEAN SEA, TURKEY)
    (Parlar Scientific Publications (P S P), 2011) Acarli, Sefa; Lok, Aynur; Acarli, Deniz
    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 parameters, such as temperature, salinity, chlorophyll-a, particulate organic matter and particulate inorganic matter in water column, were monthly measured. Fifteen bivalve species were recorded, and among these, Ostrea edulis, Pinctada radiata, Chlamys varia, Chlamys glabra, Modiolus barbatus, Mytilus galloprovincialis, Arca noae, and Anadara inaequivalvis have a commercial value. P. nobilis represented 0.84% of total amount. Settlement was observed only in August (122 individuals/0.4 m(2)) and spat data showed significant variations between outside (8%) and inside (92%)of each mesh bag collector but also the deployed time (P<0.05). Length of spat ranged between 0.3 and 15.3 mm. These results showed that reproduction period of fan mussel was during summer months in Izmir Bay, and fan mussel was collected especially in August from natural area.
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    Quantitative and qualitative observations of European sea urchin (Paracentrotus lividus, Lamarck 1816) gonad in Cesme Bay, Izmir, Turkey
    (Ege Univ, 2017) Kucukdermenci, Aysun; Lok, Aynur; Acarli, Sefa; Yigitkurt, Selcuk; Kirtik, Ali; Kurtay, Evrim
    This study examined fecundity, by means of the gonad index of the most common and abundant echinoderm species (Paracentrotus lividus) of the Aegean Sea (western Turkey). Paracentrotus lividus samples were collected monthly at the coast of Cesme for six months and biometric parameters were measured and then the animals' dissected. Gonad indices were calculated. The mean fecundity (number of eggs) was determined and eggs diameter were measured. Mean egg diameter was 91.14 +/- 1.46 mu m. There was a peak in fecundity in March (346.582 eggs/female) that correlated with the observed peak in GSI (11.02 +/- 0.54 %) and egg size (95.68 +/- 01.98 mu m). The results presented here show that a significant different was found in egg numbers and egg sizes between months (p<0.05).
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    REPRODUCTIVE CYCLE AND BIOCHEMICAL COMPOSITION IN THE ADDUCTOR MUSCLE OF THE ENDANGERED SPECIES FAN MUSSEL PINNA NOBILIS, LINNAEUS 1758 FROM THE AEGEAN SEA, TURKEY
    (Parlar Scientific Publications (P S P), 2018) Acarli, Sefa; Lok, Aynur; Acarli, Deniz; Kirtik, Ali
    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 chlorophyll-a, seawater temperature, salinity, particulate organic and particulate inorganic matter at Karantina Island, Aegean Sea, Turkey. We observed gonadal development primarily in the spring months and at the beginning of the summer. The spawning period was observed from May to September (primarily in July, with 88.8%). Monthly variation of the gonadosomatic index (GSI) was inversely correlated with protein of adductor muscle and positively correlated with glycogen of adductor muscle, meat yield, and the adductor muscle index (p <= 0.05). Our findings suggest that protein in the adductor muscle was used as an energy reserve for gametogenesis. No correlation was found between reproduction and environmental parameters, with the exception of salinity (p>0.05).
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    Reproductive cycle and biochemical composition in the adductor muscle of the endangered species fan mussel Pinna Nobilis, Linnaeus 1758 from the Aegean Sea, Turkey
    (Parlar Scientific Publications, 2018) Acarli, Sefa; Lok, Aynur; Acarli, Deniz; Kirtik, Ali
    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 chlorophyll-a, seawater temperature, salinity, particulate organic and particulate inorganic matter at Karantina Island, Aegean Sea, Turkey. We observed gonadal development primarily in the spring months and at the beginning of the summer. The spawning period was observed from May to September (primarily in July, with 88.8%). Monthly variation of the gonadosomatic index (GSI) was inversely correlated with protein of adductor muscle and positively correlated with glycogen of adductor muscle, meat yield, and the adductor muscle index (p<0.05). Our findings suggest that protein in the adductor muscle was used as an energy reserve for gametogenesis. No correlation was found between reproduction and environmental parameters, with the exception of salinity (p>0.05). © by PSP.
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    Reproductive pattern of the Phorcus turbinatus (Born, 1778) on littoral zones in Aegean Sea
    (Springer, 2025) Kucukdermenci, Aysun; Lok, Aynur; Serdar, Serpil; Acarli, Sefa; Kirtik, Ali; Hamzacebi, Sevim
    The purpose of this study was to look into morphometric changes and establish the reproductive cycle. Phorcus turbinatus morphometric correlations were established, and the reproductive period and body indices were ascertained by taking histological sections. The idea that the primary growth occurs in the gastropod's shell due to shell thickness can be supported by the meat yield and condition index, which exhibit a negative relationship with weight increase. The average annual HBA is 15.27 +/- 0.26 mm. The overall weight was 1.60 +/- 0.07 g on average. The range of the gonad index was 1.23 to 2.81%. Throughout the winter, the condition index was low; in the spring and summer, it rose. The results showed that the condition index was 4.24 +/- 0.95-23.77 +/- 4.48%, and the meat yield was 17.34 +/- 0.99-33.27 +/- 1.29%. P. turbinatus gonad stages were identified histologically as early active, late active, ripe, spawning, and recovery. Development and maturation over the course of the year demonstrate that, with the exception of the winter, reproductive activity is not interrupted. The primary reproductive phase was found to be between November and June, with temperature and nutrition assumed to be the abiotic elements influencing this, according to an analysis of data collected throughout the year.
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    Rope culture of mediterranean mussels (Mytilus galloprovincialis L. 1819) in the Dardanelles.
    (Ege Univ, 2006) Yildiz, Harun; Lok, Aynur; Kose, Aysun; Serdar, Serpil; Acarli, Sefa
    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 significant correlation (R-2=0.90) was found between mussel growth and chlorophyll-a concentrations. Maximum growth rate were obtained when chlorophyll-a concentrations peaked in May and June, whereas growth rate were minimumin winter. Our results indicated that spats reached to market size (> 50 mm) in 12 months.