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    AGE, GROWTH AND OTOLITH BIOMETRY-BODY LENGTH RELATIONSHIPS OF RED BANDFISH (Cepola macrophthalma L., 1758) IN THE SEA OF MARMARA, TURKEY
    (Trakya Univ Balkan Yerlesesi Enstituler Binasi, 2020) İşmen, Ali; Ihsanoglu, Mukadder Arslan; Daban, Ismail Burak; Inceoglu, Hasim
    The age, growth, and the otolith biometry-total length relationships of Cepola macrophthalma (Linnaeus, 1758) were investigated. The individuals were caught with beam trawl in the Sea of Marmara from March 2012 to June 2014. The individual with 51.5 cm total length sampled in this study was recorded as the new maximum size of C. macrophthalma in the Marmara Sea. The length-weight relationship showed negative allometric growth with a 1.36 b value. Otolith length-otolith weight, otolith width-otolith weight, otolith length-total length, otolith width-total length, otolith length-otolith width and total length-otolith weight relationships were found as OW=0.0002*OL2.6377 (R-2=0.91), OW=0.001*OWi(2.6215) (R-2=0.94), O=0.057*TL+3.2087 (R-2=0.57), OWi=0.0316*TL+1.8511 (R-2=0.55), OWi=0.527*OL+0.2015 (R-2=0.86), OW=0.0004*TL+0.0029 (R-2=0.58), respectively. Ages were estimated from 80 otolith readings and the minimum and maximum ages observed were 1 and 5 years, respectively. The growth parameters of the von Bertalanffy equation were calculated as L-infinity=61.95 cm, K=0.19 year(-1), t(0) = 0.05 years. A great majority of the stock (77%) consisted of younger individuals (1-2 age groups). Cepola macrophthalma stock consisted of mainly younger individuals which may indicate that an effective fishing pressure is effective on the stock.
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    Length-Weight Relationships of 17 Teleost Fishes in the Marmara Sea, Turkey
    (Kahramanmaras Sutcu Imam Univ Rektorlugu, 2020) Daban, Ismail Burak; Arslan Ihsanoglu, Mukadder; İşmen, Ali; Inceoglu, Hasim
    Length weight relationship parameters were determined for 17 fish (Arnoglossus kessleri, Blennius ocellaris, Callionymus lyra, Cepola macrophthalma, Citharus linguatula, Lesueurigobius friesii, Merluccius merluccius, Lophius piscatorius, Merlangius merlangus, Gobius niger, Mullus barbatus, Solea solea, Spicara maena, Serranus hepatus, Trachurus trachurus, Trachurus mediterraneus, Uranoscopus scober) species in the Marmara Sea. Fish samples were collected monthly bases between September of 2011 and July of 2014 with a beam trawl. The growth type of each species were determined and the calculated b values changed in range from 1.2565 to 3.4018.
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    Length-Weight Relationships of three Fish Species in the Sea of Marmara, Turkey
    (Springer International Publishing Ag, 2018) İşmen, Ali; Ihsanoglu, Mukadder Arslan; Inceoglu, Hasim
    Length-weight relationships (LWRs) are investigated for three fish species which sampled with a beam trawl between September 2011-July 2014 in the Sea of Marmara, Turkey: Callionymus maculatus (Rafinesque, 1810), Gaidropsarus biscayensis (Collett, 1890) and Lepidorhombus boscii (Risso, 1810). The data of length-weight relationship were found with W=0.0042*L-3.13(n=20), TW=0.0090*TL2.74 (n=120) and TW=0.0108*TL2.92 (n=19), respectively. According to LWRs results C. maculatus showed positive allometry, G. biscayensis presented negative allometric growth and L. boscii isometric growth. The information about this issue are reported for the first time in the Sea of Marmara for such species. In this way this study is important with new results.