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Öğe Effect of twine thickness on selectivity of gillnets for bogue, Boops boops, in Turkish waters(Natl Centre Marine Research, 2011) Ayaz, A.; Altinagac, U.; Ozekinci, U.; Ozen, O.; Altin, A.; Ismen, A.To investigate the effect of twine thickness on the selectivity of multifilament gillnet targeting bogue, Boops boops L., four different stations were sampled between March and November 2008 in the North Aegean Sea. Gillnets with 22, 23, and 25 mm nominal mesh size (bar length) each having two different twine thicknesses (approximately 0.45 mm and 0.54 mm empty set) were applied for this purpose. The deviances from the SELECT method revealed that lognormal models provided the best fits for both of the twine thicknesses. Results from the two-way ANOVA analyses revealed that the mean total lengths increased with the mesh size (F = 87.36; df = 2; P < 0.0001) and decreased with the twine thickness (F = 46.12; df = 1; P < 0.0001). The 22 mm mesh size net (0.45 mm empty set) captured significantly larger fish than the 23 mm mesh size net (0.54 mm empty set), probably due to the higher elasticity and flexibility of the thinner twine. Thus, fisheries' managers should take into consideration twine thickness while advising mesh size regulations in gillnet fisheries.Öğe First record of marlin sucker, Remora Osteochir (Cuvier, 1829), from the northeastern Aegean Sea, Turkey(2012) Tuncer, S.; Orlov, A.M.; Ozen, O.Single specimen of marlin sucker Remora osteochir (Cuvier, 1829) was captured during a commercial lift net operation in Ece Limani, Aegean Sea, Turkey. This is the first documented record of the species from northeastern Aegean Sea, Turkey. A short description of some morphological features of the specimen is provided, probable host of the specimen and species' range in the Mediterranean are discussed. © 2012 Pleiades Publishing, Ltd.Öğe Length-weight relationships of 17 less-studied fish species from Canakkale, Marmara region of Turkey(Wiley-Blackwell Publishing, Inc, 2009) Ozen, O.; Ayyildiz, H.; Oztekin, A.; Altin, A.This study reports length-weight relationships for 17 cryptic and rare species, Aidablennius sphynx, Arnoglossus kessleri, Callionymus pusillus, Callionymus risso, Clinitrachus argentatus, Echiichthys vipera, Gobius geniporus, Gobius paganellus, Labrus viridis, Lepadogaster lepadogaster, Ophidion barbatum, Pomatoschistus minutus, Pomatoschistus pictus, Salaria pavo, Tripterygion delaisi, Tripterygion tripteronotus and Zebrus zebrus from Canakkale near shores in the Marmara region of Turkey.Öğe The diet of Clinitrachus argentatus (Blennioidei: Clinidae) in the northern Aegean and Marmara Seas(Wiley, 2010) Ozen, O.; Altin, A.; Ayyildiz, H.Differences in the diet composition of small (28-42 mm total length, L-T) and large (43-75 mm L-T) individuals of the cline Clinitrachus argentatus (Clinidae) were evident. Smaller individuals preyed mainly on copepods, whereas larger individuals ate mainly amphipods, isopods, brachyurans and polychaetes.Öğe Weight-length relationships of 63 fish species in Saros Bay, Turkey(Blackwell Publishing, 2007) Ismen, A.; Ozen, O.; Altinagac, U.; Ozekinci, U.; Ayaz, A.Weight-length relationships are presented for 63 fish species sampled with a commercial trawl vessel at depths ranging from 28 to 370 m between February 2005 and April 2006 in Saros Bay, Turkey. Saros Bay was closed to trawl fishery in 2000, thus, most of the demersal fish species sampled were relatively undisturbed.
