Deniz Acarlı

LENGTH-WEIGHT RELATIONS FOR 29 FISH SPECIES FROM HOMA LAGOON, AEGEAN SEA, TURKEY

In the course of the presently reported study, covering the Homa Lagoon, Izmir Bay, Turkey, we col - lected a total of 2690 fish specimens belonging to 15 families and representing 29 species: Anguilla anguilla (Linnaeus, 1758); Atherina hepsetus Linnaeus, 1758; Atherina boyeri Risso, 1810; Belone belone (Linnaeus, 1761); Blennius ocellaris Linnaeus, 1758; Sardina pilchardus (Walbaum, 1792); Aphanius fasciatus (Valenciennes, 1821); Engraulis encrasicolus (Linnaeus, 1758); Gobius niger Linnaeus, 1758; Pomatoschistus marmoratus (Risso, 1810); Pomatoschistus minutus (Pallas, 1770); Zosterisessor ophiocephalus (Pallas, 1814); Dicentrarchus labrax (Linnaeus, 1758); Chelon labrasus (Risso, 1827); Liza aurata (Risso, 1810); Liza ramada (Risso, 1827); Liza saliens (Risso, 1810); Mugil cephalus Linnaeus, 1758; Mullus barbatus Linnaeus, 1758; Mullus surmuletus Linnaeus, 1758; Syngnathus acus Linnaeus, 1758; Syngnathus typhle Linnaeus, 1758; Diplodus annularis (Linnaeus, 1758); Diplodus vulgaris (Geoffroy Saint-Hilaire, 1817); Lithognathus mormyrus (Linnaeus, 1758); Sarpa salpa (Linnaeus, 1758); Sparus aurata Linnaeus, 1758; Platichthys flesus (Linnaeus, 1758); Solea solea (Linnaeus, 1758). The fish were weighed, and measured and their length-weight relations were determined. Samples were collected during 2009-2010 using four different types of fishing gear (beach seine, fyke nets, barrier trap, and trammel nets; mesh size: 25, 28, and 30 mm) that allowed both adult and juve - nile specimens to be captured. Significant length-weight relations were found for all species. The exponent b var - ied between 2.753 for Pomatoschistus marmoratus and 3.650 for Aphanius fasciatus (mean value = 3.115). The length-weight parameters of the same species may be different in the population because of feeding, repro - duction activities and fishing etc. Therefore, we need to know length-weight relations of fish, which are captured in a given place in a certain period of time. Length-weight relations for 5 out of the 29 fish species are present - ed for the first time from Homa Lagoon in the Turkish Aegean Sea .

Gamogenetic cycle, condition index and meat yield of the Noah’s Ark shell (Arca noae Linnaeus, 1758) from Gerence Bay, Aegean Sea Turkey

Bu calismada Gerence Korfezi’nde (Ege Denizi, Turkiye) Arca noae Linnaeus, 1758 turunun (Nuhun gemisi) gametogenik dongusu, kondisyon indeksi ve et verimi Agustos 2009 ve Temmuz 2010 tarihleri arasinda takip edilmistir. Her ornekleme doneminde sicaklik, tuzluluk, klorofil-a, partikul organik ve partikul inorganik madde icerigi belirlenmistir. Yapilan histolojik calismalara gore dinlenme safhasi Eylul ayinda %100 olarak tespit edilmistir. Eylul ayinin disinda, dol atimi tum yil boyunca gozlenmis ve Nisan ile Haziran aylari arasinda yuksek degerlerde oldugu belirlenmistir. Cinsiyet orani esit olarak tespit edilmemistir ve disiler populasyonda baskindir (2:1). Et verimi, kondisyon indeksi ve gonadindeksi arasinda pozitif iliski tespit edilmistir (P≤0.05). Cevresel parametreler icerisinde sadece partikul inorganik madde ile ureme arasinda ters iliski oldugu tespit edilmistir (P≤0.05).

The first record of the oilfish Ruvettus pretiosus Cocco, 1833 (Pisces: Gempylidae) from the Sea of Marmara, Turkey

Abstract The benthopelagic oilfish Ruvettus pretiosus Cocco, 1833 was recorded for the first time from the Marmara Sea coast in Turkey. In addition, this is the third record of the species from the Turkish sea waters.