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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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    Öğe
    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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    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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    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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    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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    Spat efficiency in the pearl oyster Pinctada radiata (Leach, 1814) in the surface and bottom water at Karantina Island
    (Walter De Gruyter Gmbh, 2020) Yigitkurt, Selcuk; Lok, Aynur; Kirtik, Ali; Acarli, Sefa; Kurtay, Evrim; Kucukdermenci, Aysun; Durmaz, Yasar
    The present study was carried out to determine the spat efficiency in the pearl oyster (Pinctada radiata, Leach, 1814) in surface and bottom water at Karantina Island (Izmir/ Turkey). Polyethylene mesh bags were used as collectors. An annual average of 175.16 +/- 11.32 spat m(-2) was obtained from PSC (placed surface collectors) and 82.65 +/- 3.89 spat m(-2) was obtained from PBC (placed bottom collectors). The largest number of new spat attachments occurred in August, both on PSC and PBC: 44 +/- 3.46 and 26 +/- 2.88 spats were found respectively in the outer and inner mesh bags of PSC, and 33 +/- 5.77 and 48 +/- 6.92 spats were found respectively in the outer and inner mesh bags of PBC. New spat attachments (10 mm) continued throughout the study period, except April and May. Adult pearl oysters (50 mm) were found in May. There was a significant difference between PSC and PBC in the total number of spat attachments, the monthly spat attachments and the first spat attachments (p < 0.05). The total number of new spat attachments was positively correlated with temperature and chlorophyll a for both depths (p<0.05).