[MARMAM] New publication on cetacean by-catch in the turbot fishery on the Turkish Western Black Sea Coast

Arda M. Tonay atonay at istanbul.edu.tr
Tue Feb 2 08:06:45 PST 2016


Dear All,

Apologies for cross posting. 

I would like to inform you that the new paper on estimates of cetacean
by-catch in the turbot fishery on the Turkish Western Black Sea Coast has
been published in the Journal of the Marine Biological Association of the
United Kingdom.

 

The pdf copy is available online via the following link. 

 

Tonay, A.M. 2016. Estimates of cetacean by-catch in the turbot fishery on
the Turkish Western Black Sea Coast in 2007 and 2008. Journal of the Marine
Biological Association of the United Kingdom. doi: 10.1017/S0025315416000060

 

 <http://dx.doi.org/10.1017/S0025315416000060>
http://dx.doi.org/10.1017/S0025315416000060

 

Abstract

This is the first study estimating cetacean by-catch in the Turkish western
Black Sea turbot fishery. One turbot fishing boat was observed during two
fishing seasons, from April through July 2007 and April through
mid-September 2008. During this time, 24 harbour porpoises and one
bottlenose dolphin were caught in turbot trammel nets. The by-catch rate was
found to be 0.18 for harbour porpoise and 0.01 for bottlenose dolphin
individuals per kilometre in 2007, and 0.19 for harbour porpoise individuals
in 2008. It is estimated that the total numbers of harbour porpoises killed
in the Turkish western Black Sea during the legal fishing period (April and
July) were 167 ± 153 (CV: 0.92) in 2007 and 329 ± 220 (CV: 0.67) in 2008,
and the number killed during both legal and illegal periods of turbot
fishing were 2011 ± 742 (CV: 0.37) in 2007 and 2294 ± 806 (CV: 0.35) in
2008. The estimated range of harbour porpoise by-catch in the turbot fishery
on the Turkish western Black Sea coast is between these two estimates. The
by-caught harbour porpoises were between 1-8 years of age. About half of
them were within the age range of 4 (26%) and 5 (21%) years old, and 78%
were physically immature individuals. Turbot fishing carried out with bottom
nets, especially in May and June, when turbot fishing is banned, is a threat
to the sustainability of harbour porpoise stocks.

 

Alternatively, pdf requests can be sent to atonay at istanbul.edu.tr

 

Regards

Arda

 

Arda M. TONAY Ph.D

Faculty of Fisheries, İstanbul University

Marine Biology Dep.

Ordu Cad. No:200 Laleli, 34480 İstanbul, Turkey

Tel: ­+90 212 455 5700/16434   Fax: +90 212 514 0379

 <mailto:atonay at istanbul.edu.tr> atonay at istanbul.edu.tr
<http://suurunleri.istanbul.edu.tr/> http://suurunleri.istanbul.edu.tr/

 

Turkish Marine Research Foundation (TUDAV)

P.O. Box 10 Beykoz, İstanbul, Turkey

Tel: +90 216 424 0772   Fax: +90 216 424 0771

 

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