No abstract

The objective of this study was to document the frequency of occurrence of very rare fish species as well as to note the changes in diversity over time. Fish species recorded fewer than five times over the past 40 years from the coasts of Izmir (central Aegean Sea) were included in the account and considered as being very rare. The records are listed chronologically. Fish species recently recorded in the area for the first time are also included. Changes in qualitative and quantitative composition of the ichthyofauna along the coasts of Izmir are also discussed.

SummaryThis work focuses on reproductive biology aspects of Uranoscopus scaber from the coast of the Aegean Sea. In total, 175 U. scaber specimens were collected in Izmir Bay using trawl nets from January to December 2005. The reproduction period according to gonadosomatic index (GSI) values extents from March to September, with a peak in May (6.32 ± 1.2). Oocyte diameters taken from 59 mature gonads ranged from 62 to 1860 lm. Maximum batch fecundity (BF) was 58091 (mean: 11556 ± 1445) in large oocytes in May, and 8408 (mean: 2821 ± 945) in hydrated oocytes in September. The BF increased with total length and body weight, excluding the ovaries. Total length (TL)-BF relationships and fish weight-BF relationships were BF = 0.0034TL 4.6248 (r = 0.47) and BF = 59.166W)3101 (r = 0.49), respectively, according to the oocyte size frequency method. There was a linear relationship between BF and fish size.

This review reports fish diversity from the coastal waters of TRNC. From the results of collected studies for both fishery and ichthyoplankton in Turkish Republic of Northern Cyprus (TRNC), we determined totally 170 fish species, belongs to 86 families. TRNC fisheries consists of small scale such as gillnet, trammel net, longline and handline fisheries.

Salaria fluviatilis (Asso,1801), Blenniidae familyasının Akdeniz'de temsil edilen tek tatlısu türüdür. Bu çalışmada, ülkemiz içsularında ilk kez doğadan örneklenen bir kemikli balığa ait yumurta ve larvaların morfolojik özellikleri verilmiştir. 22 Temmuz 2012'de Gökova Körfezi'ne açılan Akyaka Azmak Nehri'nden S. fluviatilis türüne ait çok sayıda aynı gelişim evresindeki (çoğunluğu son safhaya erişmiş) yumurtalar tespit edilmiştir. Demersal özellikteki yumurtaların çapları; 0,89-1,31x0,78-1,23 mm, bu yumurtalardan çıkan prelarvaların boyları; 2,4-3,8 mm, postlarvalarınki 3,3-4,2 mm olarak ölçülmüştür.