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    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.
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    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.
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    Length-weight relationships of eight freshwater (Cypriniformes) fish species from Turkey
    (Wiley-Blackwell, 2015) Ayyildiz, H.; Emre, Y.; Yagci, A.; Altin, A.
    The length-weight relationships for eight freshwater fish species collected from Beyehir Lake, Eirdir Lake, Aksu River, Alara River, Goksu River and Menzelet Reservoir, were analysed. This paper represents the first LWR references for four of these species and also four of these species are endemic to Turkey.
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    Relationships between total length and otolith measurements for 36 fish species from Gokceada Island, Turkey
    (Wiley, 2018) Altin, A.; Ayyildiz, H.
    The relationships between fish total length and otolith measurements (OL, OW and OR) were described by means of allometric power equation for 36 fish species from Gokceada Island, Turkey. Regressions were also estimated at genus level. A total of 14364 specimens were collected monthly using beach seine (0-2 m) and beam trawl (5-20 m) from June 2013 to June 2014. Generally, the otolith length showed the highest correlation for predicting fish total length. This paper represents the first relationships between otolith morphometrics and fish total length for 12 species. These relationships can be useful for researchers who examining stomach contents of piscivorous predators.
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    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.