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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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    A Study on the Relationships between Some Morphological and Reproductive Traits of the Turkish Crayfish, Astacus leptodactylus Eschscholtz, 1823 (Crustacea: Decapoda)
    (Taylor & Francis Inc, 2010) Berber, Selcuk; Yildiz, Harun; Ates, A. Suat; Bulut, Musa; Mendes, Mehmet
    This study was carried out to investigate relationships between some morphological and reproductive traits of the Turkish crayfish, A. leptodactylus, collected from a controlled irrigation lake in the Yenice province (Canakkale, Turkey), between July 2007 and June 2008. For this objective, two multivariate analysis techniques, namely canonical correlation analysis and multivariate multiple linear regression analysis, were used. The results of the canonical correlation analysis have shown that the morphological traits may be used to predict the changes in the reproductive traits. For instance, canonical correlation analysis results suggested that the egg weight and the number of eggs are related to the total length, carapace length, and carapace width. The results of multivariate multiple linear regression analysis, on the other hand, show a slightly different picture. Therefore, it is possible to conclude that both canonical correlation and multivariate regression results can be taken into consideration together when investigating the relations between two variable sets.
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    Annual Reproductive Cycle and Meat Yield of the Wedge Clam Donax trunculus Linnaeus, 1758 from Black Sea
    (Springer Int Publ Ag, 2024) Yildiz, Harun; Acarli, Sefa; Vural, Pervin; Gunduz, Fettah
    The study aims to determine the reproductive cycle, the condition index, meat yield, shell component index, shell thickness index and gonad index of bivalve Donax trunculus inhabiting the Kefken-Babal & imath; location on the Black Sea in relation to environmental parameters between November 2013 and October 2014. Its gonadal development began in November. D. trunculus was in the inactive stage during autumn. Spawning was observed from May (18 degrees C) to August (28 degrees C). Sex ratios were not equal and number of males was higher during the study period (1.13:1) with one hermaphrodite individual only. Being synchronous between sexes based on histological analysis, the reproductive cycle consists of six stages. The study showed that the most ideal period to harvest of D. trunculus was between December and May, especially when the meat yield and condition index were determined to be highest.
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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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    Comparative study on biochemical composition of some edible marine molluscs at Canakkale coasts, Turkey
    (Natl Inst Science Communication-Niscair, 2014) Celik, MeryemYesim; Culha, Saniye Turk; Culha, Mehmet; Yildiz, Harun; Acarli, Sefa; Celik, Ihson; Celik, Painar
    Present study was carried out, at Dardanelles and the Marmara Sea coasts during March 2011 to February 2012. Ostrea edulis, Mytilus gallopro, Ruditapes decussa, Ruditapes pheleppirnarum and Rapona venosa were collected seasonally along with temperature and salinity. Biochemical composition of molluscs (protein, lipid, carbohydrate, moisture and ash) was examined from the samples. Seasonal values of protein, lipid, carbohydrate, ash and moisture were mean 64.71 +/- 1.31%, 1.86 +/- 0.10%, 24.09 +/- 1.33%, 9.35 +/- 0.26% and 67.51 +/- 1.47% in R.venosa; 55.88 +/- 2.04%, 5.60 +/- 0.19%, 23.43 +/- 1.59%, 15.10 +/- 0.67% and 83.28 +/- 0.86% inR. philipinarium; 56.27 +/- 1.98%, 5.82 +/- 0.34%, 23.39 +/- 1.62%, 14.53 +/- 0.66% and 83.58 +/- 0.59% in R. decussatus; 54.03 +/- 2.82%, 10.52 +/- 1.22%, 22.84 +/- 4.33%, 12.61 +/- 2.54% and 82.45 +/- 1.70% in M. galloprovincialis; 48.11 +/- 3.04%, 8.81 +/- 0.65%, 29.16 +/- 4.62%, 13.92 +/- 1.89% and 82.25 +/- 2.66% in O. edulis, respectively. Consequently, the sampled mollusc species has high protein (40.19 - 67.38 %) and low lipid (1.65 - 12.86 %). Overall, R. venosa appears to be best as diet with relatively high protein and low lipid among other examined molluscs.
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    Depth and Seasonal Effects on the Settlement Density of Mytilus galloprovincialis L. 1819 in the Dardanelles
    (Medwell Online, 2010) Yildiz, Harun; Berber, Selcuk
    The seasonal pattern of recruitment of the mussel, Mytilus galloprovincialis, on artificial collectors, situated at four different depth (0.5, 4, 8, 12 m) in the Dardanelles. The presence of pediveliger mussels throughout the year and their abundance in march reflects the presence of spawning mussels throughout the year and the occurence of a major spawning period during beginning of spring. Different densities of mussel settlement were detected at the different depths. Mussel seed density was higher at 0.5 m (surface) and 4 m than 8 and 12 m throughout the year. Artificial collectors should be hung within the first 8 m (especially within 4 m) of the water column in order to exploit the highest settlement in the upper parts.
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    Distribution of macrozoobenthic invertebrates in the South Marmara Sea
    (2010) Palaz, Mustafa; Colakoglu, Serhat; Yildiz, Harun
    A study was undertaken between 2007-2009 in the Dardanelles. Monthly sampling was carried out in 4 stations up to 10m of water depths by using dredge. The samples were fixed and preserved in 5% formalin prepared in marine water. Morever, anatomical and morphological characteristics of identified species were illustrated with photographs. The specimens were examined the macroscopic and then microscopic under the light of binocular microscope. According to the results; total of 22 species belonging to 7 Order, 5 Kalssis was found in the South Marmara Sea. © Medwell Journals, 2010.
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    Distribution of Macrozoobenthic Invertebrates in the South Marmara Sea
    (Medwell Online, 2010) Palaz, Mustafa; Colakoglu, Serhat; Yildiz, Harun
    A study was undertaken between 2007-2009 in the Dardanelles. Monthly sampling was carried out in 4 stations up to 10 m of water depths by using dredge. The samples were fixed and preserved in 5% formalin prepared in marine water. Morever, anatomical and morphological characteristics of identified species were illustrated with photographs. The specimens were examined the macroscopic and then microscopic under the light of binocular microscope. According to the results; total of 22 species belonging to 7 Order, 5 Kalssis was found in the South Marmara Sea.
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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 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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    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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    REPRODUCTION CYCLES OF VEINED RAPA WHELK (Rapana Venosa, VALENCIENNES 1846) IN THE MIDDLE BLACK SEA (YAKAKENT, SAMSUN)
    (Parlar Scientific Publications (P S P), 2022) Yildiz, Harun; Gunduz, Fettah
    The veined Rapa whelk, Rapana venosa (Valenciennes, 1846), have a significant commercial value in Turkey. This study was carried out between December 2013 and November 2014 in the Black Sea. R. venosa was collected to determine the reproductive cycle, the gonadosomatic index, gonad index. Monthly variation in gonad development stages revealed that R. venosa has an annual reproductive cycle and long gonadal activity period. Spawning occurred mainly between May and July and peaked in July and in September. The gonad development stages of males and females differed significantly (P<0.05) between months. In November, 1 out of 30 samples were found as a hermaphrodite, containing both sperm and eggs in the same area. Male individuals were dominant during the study period (1.0:2.4 female: male).
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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.
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    Seasonal variation in the condition index, meat yield and biochemical composition of the flat oyster Ostrea edulis (Linnaeus, 1758) from the Dardanelles, Turkey
    (Taylor & Francis Ltd, 2011) Yildiz, Harun; Berber, Selcuk; Acarli, Sefa; Vural, Pervin
    This study was conducted in Dardanelles between October 2007 and August 2009 when condition index, meat yield, biochemical compositions and environmental parameters of seawater were investigated and the study area was found to have available conditions for cultivation. Investigation of the study area showed a positive correlation in particular among condition index, seasonal variation of temperature, protein, fat and chlorophyll-a; a negative correlation was seen between them and carbohydrate value. It was clear from the two years study that the most ideal period for oyster harvest is April and August especially when condition index was maximum followed by a winter with no oyster yield is available in terms of the related processes involving oyster cultivation.
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    Temporal variability in biochemical composition and morphometric parameters of cultivated Mediterranean mussels (Mytilus galloprovincialis) in Çanakkale, Türkiye
    (Elsevier, 2024) Acarli, Sefa; Vural, Pervin; Yildiz, Harun
    In recent years, there has been a growing interest in bivalve and gastropod species (Mollusca phylum) due to their high nutritional value compared to terrestrial organisms. Bivalve species, in particular, hold significant potential for both aquaculture and fishing industries worldwide. Among shellfish, mussels play a crucial role in aquatic ecosystems. Parameters such as meat yield and condition index are essential for determining consumption strategies of bivalve species. Thus, this study focused on monthly collections of Mediterranean mussels (Mytilus galloprovincialis) from & Ccedil;anakkale Gelibolu Ilgardere Mediterranean Mussel Cultivation Farmers between March 2019 and February 2020. During this period, analyses were conducted for condition index, meat yield, shell component index, as well as protein, carbohydrate, lipid, and ash content. The temperature variations in the study area aligned with seasonal changes maximum value and minimal value were recorded as 8.7 degrees C in March and 27.3 degrees C in July. Salinity values ranged from 15.2 parts per thousand in November and January to 24.01 parts per thousand in December. The length of mussels ranged from 52.54 mm to 68.53 mm, with total weights ranging from 11.18 g to 25.37 g. The length-weight relationship of Mediterranean mussels was determined as Weight = 0.0002 * Length(2.80)(6). Condition index, meat yield, and shell component index exhibited significant variations across months (P < 0.05). There was no relationship between these parameters and environmental factors. Fluctuations in protein content were observed, with the lowest recorded in May (41.88 %) and the highest in November (61.19 %). Lipid, carbohydrate, and ash content ranged between 12.49 % and 18.59 %, 9.69 % and 34.31%, and 6.95 % and 18.06 %, respectively. Overall, it can be concluded that aside from the summer months, the harvesting and consumption of cultivated mussels are more suitable in terms of meat quality and biochemical profile.
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    Temporary Timing of Reproductive Traits with Respect to Environmental Variables in Turkish Crayfish in Yenice Reservoir
    (Kafkas Univ, Veteriner Fakultesi Dergisi, 2011) Berber, Selcuk; Yildiz, Harun; Ozen, Ozcan; Mendes, Mehmet; Palaz, Mustafa
    This study was carried out to determine the relationships between physicochemical parameters and morphometric and reproduction features of the crayfishes (Astacus leptodactylus) in Yenice Central Irrigation Pond. Results of MDS analysis revealed that the relationships between physicochemical parameters and morphometric features and reproduction features in crayfishes could be explained at different rates. Reproduction features such as fecundity and sperm production, were within a close relationship with temperature, magnesium, conductivity, dissolved oxygen, and the abdomen weight, carapace weight, abdominal width, carapace width, abdomen length, carapace length from morphometric features were within a close relationship especially with dissolved oxygen, magnesium, calcium, and temperature. These relationships could play an important role while considering the selection of maternal females for cultural environments and for the management of productive population, and for the selection of water sources that can be effective for populations that is generated by vaccination.