performed (Anton et al. 2002; Anton 2006; Anton et al. 2006, 2012; Radu et al.
2012). The study of marine mammals requires a temporal continuity, because of the
complex and systematic research that needs to be carried-out in order to establish
the species composition, distribution, occurrence frequency and abundance (Anton
et al. 2008).
Apart from these population parameters of marine mammals, the interaction
between cetaceans and fisheries is an issue of great concern (Anton et al. 2010;
Radu and Anton 2014). Fisheries may affect significantly the conservation state of
cetacean populations, by causing accidental death due to capture or entanglement in
gillnet-type fishing gear. For such reasons, with the view to protecting marine
mammal populations, research has been carried-out to establish technical solutions
aimed at reducing accidental by-catches reported in gillnet-type fishing gear (Anton
et al. 2013).
The aim of this study was to outline the recent marine mammal sighting and
abundance related to the distribution in front of Romanian Black Sea coast in 2013.
27.2 Experimental
Assessing cetacean populations, in full compliance with the working methodology
used regionally and internationally (Birkun et al. 2014), imposed the need to have
observations both from the shore (seashore, protection dikes etc.) and offshore, on
board of vessels and boats.
Depending on where the observations were made, the monitoring activity of
marine mammals can be divided as follows:
– Monitoring observations at sea;
– Terrestrial monitoring observations from shore.
The marine mammal observation area ranged between Sulina (north) and Vama
Veche (south), from shore to the 90–100 m isoline (Fig. 27.1).
The coordinates delimiting each of the three monitoring zones and the area
covered for each sector are given below:
Southern Area
SW: 43,044
0 11
00 lat. N and 28,035
0 07
00 long. E;
SE: 43,040
0 04
00 lat. N s ¸i 29,052
0 59
00 long. E;
NW: 44,010
0 48
00 lat. N s ¸i 28,040
0 46
00 long. E;
NE: 44,006
0 38
00 lat. N s ¸i 30,015
0 28
00 long. E;
Area covered ¼ 6085 km
2
Central Area
SW: 44,010
0 48
00 lat. N and 28,040
0 46
00 long. E;
SE: 44,006
0 38
00 lat. N and 30,015
0 28
00 long. E
NW: 44,038
0 10
00 lat. N and 28,059
0 12
00 long. E;
NE: 44,033
0 19
00 lat. N and 30,055
0 22
00 long. E;
Area covered ¼ 7769 km
2
474
G. T ¸ iganov et al.
2012). The study of marine mammals requires a temporal continuity, because of the
complex and systematic research that needs to be carried-out in order to establish
the species composition, distribution, occurrence frequency and abundance (Anton
et al. 2008).
Apart from these population parameters of marine mammals, the interaction
between cetaceans and fisheries is an issue of great concern (Anton et al. 2010;
Radu and Anton 2014). Fisheries may affect significantly the conservation state of
cetacean populations, by causing accidental death due to capture or entanglement in
gillnet-type fishing gear. For such reasons, with the view to protecting marine
mammal populations, research has been carried-out to establish technical solutions
aimed at reducing accidental by-catches reported in gillnet-type fishing gear (Anton
et al. 2013).
The aim of this study was to outline the recent marine mammal sighting and
abundance related to the distribution in front of Romanian Black Sea coast in 2013.
27.2 Experimental
Assessing cetacean populations, in full compliance with the working methodology
used regionally and internationally (Birkun et al. 2014), imposed the need to have
observations both from the shore (seashore, protection dikes etc.) and offshore, on
board of vessels and boats.
Depending on where the observations were made, the monitoring activity of
marine mammals can be divided as follows:
– Monitoring observations at sea;
– Terrestrial monitoring observations from shore.
The marine mammal observation area ranged between Sulina (north) and Vama
Veche (south), from shore to the 90–100 m isoline (Fig. 27.1).
The coordinates delimiting each of the three monitoring zones and the area
covered for each sector are given below:
Southern Area
SW: 43,044
0 11
00 lat. N and 28,035
0 07
00 long. E;
SE: 43,040
0 04
00 lat. N s ¸i 29,052
0 59
00 long. E;
NW: 44,010
0 48
00 lat. N s ¸i 28,040
0 46
00 long. E;
NE: 44,006
0 38
00 lat. N s ¸i 30,015
0 28
00 long. E;
Area covered ¼ 6085 km
2
Central Area
SW: 44,010
0 48
00 lat. N and 28,040
0 46
00 long. E;
SE: 44,006
0 38
00 lat. N and 30,015
0 28
00 long. E
NW: 44,038
0 10
00 lat. N and 28,059
0 12
00 long. E;
NE: 44,033
0 19
00 lat. N and 30,055
0 22
00 long. E;
Area covered ¼ 7769 km
2
474
G. T ¸ iganov et al.