TECHNICAL MEASURES IN ORDER TO DECREASE INTERACTIONS BETWEEN DOLPHINS AND FISHERMEN: PINGERS

Yıl 2017, , 151 - 159, 20.06.2017

Sedat Gönener , Uğur Özsandıkçı

https://doi.org/10.3153/JAEFR17018

Öz

Almost all marine mammal species
are in interaction with fishing activities and this interaction frequently
results with the death of marine mammals in gillnet fisheries. This situation
which results with the death of thousands of harbor porpoise (Phocoena phocoena) and bottlenose
dolphin (Tursiops truncatus) is
defined as by-catch ( non-target catch) in gillnet fisheries and in this way it
is legalized at least partially. These inreactions between fisheries and
dolphins cause ecologic and social concerns, while that means much more
economic losses from the perspective of fishermen. In most of studies which aim
to determine necessary measures to reduce by-catch of dolphins, gillnet
fisheries is taken as basis and dolphin deterrent devices called pingers are used.
In this subject many studies have been carried out in world, while only a few
in Black Sea. However, it is still difficult to make an assessment for
effectiveness of pingers. In addition to this, many studies including those of
performed in Black Sea outline that pingers can keep harbor porpoise (Phocoena phocoena) and bottlenose
dolphin (Tursiops truncatus) away
from gillnets for 1-2 years but it is vital that monitoring the situation after
this period.

Anahtar Kelimeler

Dolphins, Pingers, Fisheries, Black Sea

Kaynakça

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