Značajke rasta oslića, Merluccius merluccius (Linnaeus, 1758.), u sjeveroistočnom dijelu Sredozemnog mora

In this study, the age and some growth characteristics of the European hake, Merluccius mer-luccius, from the northeastern Mediterranean were examined during 2015-2016 fishing season. A total of 661 European hake ranging from 9.8 to 51.6 cm in total length was captured by commercial trawler. Female/male ratio was 1/1.15. Age determination was conducted using the sagittal otoliths. Ages of examined individuals ranged from 1 to 7 years. The von Bertalanffy growth parameters fitted to the average measured total lengths-at-age for each sex separately and estimated as L∞= 93.98 cm, k= 0.114 year-1, t0= -0.597 year for females, as L∞= 77.65 cm , k= 0.153 year-1, t0= -0.343 year for males and as L∞= 84.44 cm, k= 0.135 year-1, t0= -0.469 year for combined sexes. The growth performance value (Φ) of the European hake population was computed as 2.98 for combined sexes. Mean condition factor value for population was 0.654±0.021; the highest condition factor was found as 1.01 in fish at age 7.U ovom radu istraženi su starost i neke značajke rasta oslića, Merluccius merluccius, u sjeveroistočnom dijelu Sredozemmnog mora, tijekom ribolovne sezone 2015-2016.Koćom je ukupno ulovljeno 661 jedinka oslića čija je ukupna duljina kolebala u rasponu od 9,8 do 51,6 cm. Omjer između ženki i mužjaka je iznosio 1:1,15. Procjena starosti je provedena pomoću očitavanja sagitalnih otolita. Starost jedinki se kretala u rasponu od 1 do 7 godina.Parametri rasta prema von Bertalanffy-jevoj jednadžbi prilagođeni su prosječno izmjerenim ukupnim duljinama po starosti za svaki spol odvojeno i procijenjeni kao L∞ = 93,98 cm, k = 0,114 godina-1, t0 = -0,597 godina za ženke, te kao L∞ = 77,65 cm , k = 0,153 godina-1, t0 = -0,343 godina za mužjake i L∞ = 84,44 cm, k = 0,135 godina-1, t0 = -0,469 godina za oba spola.Vrijednost rasta (Φ) u populaciji oslića izračunata je kao 2,98 za oba spola. Srednja vrijednost kondicijskog čimbenika populacije iznosila je 0,654 ± 0,021; najveći utvrđeni kondicijski čimbenik iznosio je 1.01 kod riba u dobi od 7 godina

A Checklist of the Non-indigenous Fishes in Turkish Marine Waters

A checklist of non-indigenous marine fishes including bony, cartilaginous and jawless distributed along the Turkish Marine Waters was for the first time generated in the present study. The number of records of non-indigenous fish species found in Turkish marine waters were 101 of which 89 bony, 11 cartilaginous and 1 jawless. In terms of occurrence of non-indigenous fish species in the surrounding Turkish marine waters, the Mediterranean coast has the highest diversity (92 species), followed by the Aegean Sea (50 species), the Marmara Sea (11 species) and the Black Sea (2 species). The Indo-Pacific origin of the non-indigenous fish species is represented with 73 species while the Atlantic origin of the non-indigenous species is represented with 22 species. Only first occurrence of a species in the Mediterranean, Aegean, Marmara and Black Sea Coasts of Turkey is given with its literature in the list

Türkiye' nin Doğu Akdeniz kıyılarında dikenli keler (Squatina aculeata Cuvier, 1829) türünün bulunuşuna ilişkin ilk kayıt

A specimen of Squatina aculeata (sawback angelshark) was caught in a trawl on 15 May 1997 in Iskenderun Bay at about 120-200 m depth and recorded for the first time from the Eastern Mediterranean Coast of Turkey. Thus, a new species of fish was recently added to the chondrictyes fish fauna in the eastern Mediterranean Sea of Turkey.A specimen of Squatina aculeata (sawback angelshark) was caught in a trawl on 15 May 1997 in Iskenderun Bay at about 120-200 m depth and recorded for the first time from the Eastern Mediterranean Coast of Turkey. Thus, a new species of fish was recently added to the chondrictyes fish fauna in the eastern Mediterranean Sea of Turkey

Aslantaş ve Mehmetli (Adana) baraj göllerinde yaşayan ekonomik öneme sahip iki Cyprinid türünün (3arbus rajanorum, Capoeta barroisi) büyüme performanslarının incelenmesi

TEZ1324Tez (Yüksek Lisans) -- Çukurova Üniversitesi, Adana, 1993.Kaynakça (s. 43-44) var.viii, 46 s. ; 30 cm.…Bu çalışma Ç.Ü. Bilimsel Araştırma Projeleri Birimi Tarafından Desteklenmiştir

İskenderun Körfezi'nde bulunan pelajik ve demersel balıklar

TEZ2479Tez (Doktora) -- Çukurova Üniversitesi, Adana, 1997.Kaynakça (s. 195-200) var.ix, 200 s. ; res. ; 30 cm.

Length-Weight Relationship of Brown Comber, Serranus hepatus, Linnaeus, 1758 from Iskenderun Bay, Northeastern Mediterranean, Turkey

This study describes the length-weight relationship (LWR) for Serranus hepatus from Iskenderun Bay, Northeastern Mediterranean, Turkey. A total of 202 individuals were caught from Iskenderun Bay, during the 2015-2016 fishing season. The total length ranged from 5.7-9.5 cm and body weight 2.23-12.19 g. Length-weight relationship was found as the W = 0.0172L2.9664 (R2=0.84, F1,200=21.221, P < 0.001) and SEb= 0.091 (t-test: 32.706 p < 0.01). The types of growth were found isometric growth for all indivuduals of S. hepatus

Güneydoğu Karadeniz' de Mahmuzlu Camgöz (Squalus acanthias) ile vatoz (Raja clavata) arasındaki besinsel rekabet

Bu çalışmada mahmuzlu camgöz (Squalus acanthias) ve vatoz (Raja clavata) türlerinin besin kompozisyonu ve aralarındaki besinsel rekabet araştırılmıştır. Bölgede, mahmuzlu camgöz ve vatozun besininin genel olarak kabuklulardan ve balıklardan oluştuğu tespit edilmiştir. Mahmuzlu camgözün beslenme stratejisinde ana kriter besinin bulunabilirliğidir. Kış mevsiminde ortamda yoğun olarak bulunan hamsi, mahmuzlu camgözün bu dönemdeki ana besinidir. Bu durum, mahmuzlu camgözün besin kompozisyonunu ve diyet genişliğini etkilediği gibi, dolayı olarak vatozun besin komposisyonu ile olan diyet benzerliği ve rekabetini de etkilemektedir. Çalışmada bu iki türün besin benzerliği indeksi %38 olarak bulunmuştur. Ayrıca vatozun besin kompozisyonu üzerinde mahmuzlu camgözün besin örtüşme değeri 1,38 olarak bulunmuştur. Bunun yanında daha dar bir diyete sahip olan mahmuzlu camgözün besin kompozisyonu üzerinde vatozun besin örtüşme değeri 0,36 olarak bulunmu?tur. Sonuç olarak, R. clavata kış mevsiminde hamsi ve mezgit ile, yılın kalan döneminde yengeç, kayabalığı türleri, diğer demersal balık türleri ve mezgitle beslenirken, mahmuzlu camgöz beslenme konusunda seçici davranmamakta ve ortamda bulunan her besin maddesini tüketebilmektedir.The food composition and dietary overlap between the spiny dogfish (Squalus acanthias) and thornback ray (Raja clavata) were studied in the Eastern Black Sea. It was found that the food of S. acanthias and R. clavata in the area studied consisted of mainly fish and crustaceans. The availability of prey was found to be the main criterion in the spiny dogfish feeding strategy. In winter, anchovy were the dominant prey for S. acanthias. This reflects that there is a high availability of these prey in the region. The availability of prey items affected the diet composition, the values of diet breadth, the prey similarity and the dietary overlap of the thornback ray and spiny dogfish. The study has shown that the prey similarity index of these species was 38%. The diet of R. clavata was significantly overlapped by the diet of S. acanthias (1.38). However, S. acanthias was observed to have a more unique diet and was insignificantly overlapped by R. clavata (0.36). The overall results indicate that the spiny dogfish is an indiscriminate predator preying upon those species that are most abundant and available in the area and season, and that R. clavata also feed mainly on anchovy and whiting in the winter but shift to crab and Gobius sp., a demersal species common in the area, together with whiting for the rest of the year