«n 



r15 



10- 



-10 



5- 



0-" .-r- 



1860 



65 



70 



75 



80 



85 



90 



95 



L 



1900 



19n 



10 



5- 



4WhJU 



30 35 40 



r15 



-10 



-5 



1901 05 



10 



5- 



41 45 50 



60 65 



D NUMBER OF FISH/10^ 

 METRIC TONS/IO^ 



60 



Year 



*4tt 



70 



75 



T — r- 



60 



r 10 



Figure 59. Annual catcli of bluefui tuna tVoin llic Sidi Daoud trap in I'unisia in tliousands ol lisli mid hundreds ot" metric 

 tons. 



Turkish fishing for bhietln tuna 

 is by trap, handlinc and harpoon 

 (Ninni 1922. Dcvcdjian 1926, 

 Hovas.se 1 929. Lebederfl9.-^r,.Akyuz 

 and Artuz 1957. lyigiingiir 19,^7. 

 Belloc 1961). Lebe'deff (19.16) de- 

 scribed sport fishing near Istanbul in 

 the winter of 19.15-.16. The favorable 

 situation for developing a sport llsh- 

 ery there was also mentioned by 

 lyigilngor (1957), but we have no 

 further information on this subject. 



I'arona (1919) showed 26 loca- 

 tions for traps in the easlem .Sea ol' 

 Mannoia and the Bosphorus. 13elloc 

 (1961) noted that Devedjian (1926) 

 showed 225 emplacements lor 1 urk- 

 ish traps in the Black Sea. Bosphorus. 

 Marmora and Dardanelles, but his 

 charts show only I 9 in the Bosphorus 

 and eastern Marmora and 1\\() m the 

 Dardiuielles. Only a few of these were 

 noted for catching bluelln tuna. Ninni 

 (1922) noted that there were .some 

 "summer" and .some winter' traps. 



but lyigiingor (1957) said that the 

 traps fished from early April to the 

 end of August. He estimated the av- 

 erage season's catch per trap at 100- 

 150 mna. Opinions al.so dlifered as 

 to the periods of pa.ssage. Ninni de- 

 scribed an "arrival " (northward) run 

 from late March to mid-August and a 

 "rctuni (soullnvard run from early 

 Augiisl lo December or even I''ebru- 

 ary. llo\asse (1927). on the basis of 

 catch records for the years 1915 and 

 1921-192''. Ibund three maxima in 



64 



