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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%.
Çanakkale Boğazında yavru (Spat) midyelerin (Mytilus galloprovincialis Lamarck, 1819) yapay kollektörlere tutunma ve büyüme performansları
(2005) Yıldız, Harun; Lök, Aynur; Serdar, Serpil; Acarlı, Sefa; Köse, Aysun
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 devam ettiği belirlenmiştir. Kollektörlere yaz aylarında tutunan pediveliger ve postlarva aşamasındaki midyelerin yaşama oranının çok düşük olduğu tespit edilmiştir. Bir yıl sonra, Ağ ip 1 kollektöründeki midyelerin 30 - 50 mm boy aralığında olduğu saptanmıştır. Ağ ip 2 kollektöründeki midyeler ise, 20 - 33 mm boy aralığında ölçülmüştür.
Çanakkale Boğazında yavru midyelerin (Mytilus galloprovincialis L., 1819) halat sisteminde yetiştiriciliği
(2006) Yıldız, Harun; Lök, Aynur; Köse, Aysun; Serdar, Serpil; Acarlı, Sefa
Bu çalışma, Mayıs 2002 - Mayıs 2003 tarihleri arasında Çanakkale Boğazı Kilya (Poyraz) Koyu'nda yapılmıştır. Çalışmanın başlangıcında, ellenme ve suyun dışında kalmaya bağlı stresten dolayı midye kayıpları fazla olmuştur (%8.34). Yaz mevsiminde de yüksek olan midye kayıpları, kış aylarında minimum seviyelere inmiştir. Midyelerin büyüme oranlarıyla, suyun klorofil-a miktarları arasında önemli bir ilişki bulunmuştur (R2=0.90). Klorofil-a miktarının en yüksek seviyelerde olduğu Mayıs ve Haziran aylarında, midyelerdeki büyüme maksimuma çıkmış, kış aylarında ise minimum seviyelere inmiştir. Çalışmanın sonunda, Çanakkale Boğazı'ndaki yavru midyelerin bir yıl içerisinde pazarlık boya (> 50 mm) ulaştıkları saptanmıştır.
Çeşme Körfezi'ndeki (Doğu Ege Denizi) Avrupa Deniz Kestanesi'nin (Paracentrotus lividus, Lamarck, 1816) gonad ve mide indeksleri
(2015) Küçükdermenci, Aysun; Lök, Aynur; Serdar, Serpil; Acarlı, Sefa; Acarlı, Deniz; Yıldız, Harun; Yiğitkurt, Selçuk
Bu çalışmanın amacı Ege Denizi kıyılarında bulunan Paracentrotus lividus populasyonunun mide ve gonad verimini belirlemek ve gonad indeks değişimi üzerine çevresel koşulların etkisini değerlendirmektir. Bunu gerçekleştirmek içinde, oniki ay boyunca örnekler toplandı ve biyometrik ölçümler yapıldı. Kasım ve Mayıs ayları arasında su sıcaklığı çok fazla değişmemesine rağmen yaş gonad indeksi en soğuk aylardan biri olan Nisan ayında (14°C) pik (6.22±0.56 %) yaptı. Bu çalışmada, su sıcaklığının düşmesi gonad üretimini etkilediği fakat gonadı etkileyenin sadece sıcaklık olmadığı çünkü diğer soğuk aylar boyunca gonad indeksinin yüksek olmadığı belirlendi. Mide indeksi (GII) Ocak (% 6.31±0.71) ve Mayıs (% 6.07±0.70) ayları arasında daha yüksekti. Bu çalışmada mide indeksi ilkbaharda sonbahara gore daha yüksekti.
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.
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.
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; Acarlı, Sefa; Serdar, Serpil; Köse, Aysun; Yıldız, 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.
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.
Influences of different collector materials on Mediterranean Mussel, Mytilus galloprovincialis L. 1819 in the Dardanelles.
(Adem Yavuz SÖNMEZ, 2013) Yıldız, Harun; Lök, Aynur; Acarlı, Sefa; Serdar, Serpil; Küçükdermenci, Aysun; Berber, Selçuk; Vural, Pervin
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, and jute rope) were deployed in the water column. Spat recruitment was not varied between collector materials (p>0.05). When resistance of ropes were compared against the effects of water, it was found that net rope was most suitable for the mussel seed collection. Net collectors were deployed in February, March, April, May, June, and January. Mussel spat settlement was observed throughout the study, however between collectors, spat attachment was significantly different between months (p<0.05). The higher attachment period was observed in February and April. These results showed that mussel reproduction period was all year round and first attachment individuals reached marketable (<50 mm) size in 1.5 year.
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.
Reproductive pattern of the Phorcus turbinatus (Born, 1778) on littoral zones in Aegean Sea
(Springer, 2025) Küçükdermenci, Aysun; Lok, Aynur; Serdar, Serpil; Acarlı, Sefa; Kırtık, Ali; Hamzaçebi, 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.
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.
Seasonal variation in reproductive activity and biochemical composition of flat oyster (Ostrea edulis) in the Homa Lagoon, Izmir Bay, Turkey
(Consejo Superior Investigaciones Cientificas-Csic, 2015) Acarli, Sefa; Lok, Aynur; Kirtik, Ali; Acarli, Deniz; Serdar, Serpil; Kucukdermenci, Aysun; Yigitkurt, Selcuk
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% inactive. Glycogen content showed considerable variations between August and February, but decreased gradually thereafter. However, glycogen did not directly affect the reproductive cycle. Total lipid content was positively correlated with temperature and inversely correlated with salinity. In addition, this parameter was influenced by the reproductive activity, which is correlated with the fluctuation of the condition index and gonad index (P<0.05). However, the relationship between the protein index and the gonad index was negative (P<0.05). The results of this study showed that protein was the major energy resource. The condition index varied between 2.69 +/- 0.91 (February) and 12.29 +/- 1.45 (April) during the year. With respect to meat yield, oyster quality changed from fine to special, except in December and February.

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