Subject: Data Harbor Porpoise Location Norway

mike williamson (williams@www1.wheelock.edu)
Sun, 13 Jun 1999 15:24:37 -0400 (EDT)

Thor
07246  Date : 05.06.99 16:30:05  LC : 2  IQ : 56
      Lat1 : 69.812N  Lon1 :  31.291E  Lat2 : 66.703N  Lon2 :  13.920E
      Nb mes : 009  Nb mes>-120dB : 001  Best level : -119 dB
      Pass duration : 627s   NOPC : 2
      Calcul freq : 401 649934.2 Hz   Altitude :    0 m
           19202        19202
07246  Date : 06.06.99 16:42:25  LC : 2  IQ : 66
      Lat1 : 69.757N  Lon1 :  31.441E  Lat2 : 58.764N  Lon2 :  34.031W
      Nb mes : 006  Nb mes>-120dB : 000  Best level : -123 dB
      Pass duration : 301s   NOPC : 3
      Calcul freq : 401 649939.3 Hz   Altitude :    0 m
           23542        23542

 07246  Date : 07.06.99 17:28:12  LC : 2  IQ : 58
      Lat1 : 69.840N  Lon1 :  31.751E  Lat2 : 62.696N  Lon2 :   8.283W
      Nb mes : 009  Nb mes>-120dB : 000  Best level : -122 dB
      Pass duration : 675s   NOPC : 4
      Calcul freq : 401 649935.1 Hz   Altitude :    0 m
           34780        34780
07246  Date : 08.06.99 17:04:21  LC : 2  IQ : 56
      Lat1 : 69.935N  Lon1 :  32.400E  Lat2 : 64.150N  Lon2 :   0.228W
      Nb mes : 010  Nb mes>-120dB : 004  Best level : -118 dB
      Pass duration : 579s   NOPC : 3
      Calcul freq : 401 649934.7 Hz   Altitude :    0 m
           46869        47000
07246  Date : 09.06.99 16:33:25  LC : 2  IQ : 58
      Lat1 : 69.948N  Lon1 :  32.239E  Lat2 : 73.419N  Lon2 :  50.194E
      Nb mes : 007  Nb mes>-120dB : 001  Best level : -120 dB
      Pass duration : 604s   NOPC : 3
      Calcul freq : 401 649938.3 Hz   Altitude :    0 m
           63896        63896
07246  Date : 11.06.99 17:39:24  LC : 3  IQ : 67
      Lat1 : 69.934N  Lon1 :  32.397E  Lat2 :  0.743N  Lon2 :   0.387W
      Nb mes : 005  Nb mes>-120dB : 000  Best level : -121 dB
      Pass duration : 426s   NOPC : 4
      Calcul freq : 401 649937.3 Hz   Altitude :    0 m
           22535        22535


Ulvstein
07248  Date : 06.06.99 00:54:00  LC : 2  IQ : 58
      Lat1 : 70.201N  Lon1 :  31.005E  Lat2 : 61.047N  Lon2 :  80.502E
      Nb mes : 010  Nb mes>-120dB : 000  Best level : -122 dB
      Pass duration : 656s   NOPC : 4
      Calcul freq : 401 649735.4 Hz   Altitude :    0 m
           41685        41685
07248  Date : 07.06.99 05:48:51  LC : 3  IQ : 58
      Lat1 : 70.115N  Lon1 :  30.891E  Lat2 : 64.400N  Lon2 :  62.921E
      Nb mes : 013  Nb mes>-120dB : 001  Best level : -120 dB
      Pass duration : 762s   NOPC : 4
      Calcul freq : 401 649735.5 Hz   Altitude :    0 m
           49147        49147
07248  Date : 08.06.99 00:32:08  LC : 2  IQ : 58
      Lat1 : 69.985N  Lon1 :  30.451E  Lat2 : 59.214N  Lon2 :  89.531E
      Nb mes : 010  Nb mes>-120dB : 000  Best level : -121 dB
      Pass duration : 705s   NOPC : 4
      Calcul freq : 401 649729.6 Hz   Altitude :    0 m
           61539        61539
07248  Date : 09.06.99 02:02:35  LC : 1  IQ : 57
      Lat1 : 69.927N  Lon1 :  30.639E  Lat2 : 65.440N  Lon2 :  54.379E
      Nb mes : 011  Nb mes>-120dB : 000  Best level : -121 dB
      Pass duration : 792s   NOPC : 3
      Calcul freq : 401 649718.5 Hz   Altitude :    0 m
           20351        20095
07248  Date : 10.06.99 23:57:43  LC : 2  IQ : 58
      Lat1 : 70.002N  Lon1 :  30.635E  Lat2 : 57.119N  Lon2 : 102.877E
      Nb mes : 013  Nb mes>-120dB : 000  Best level : -124 dB
      Pass duration : 688s   NOPC : 4
      Calcul freq : 401 649717.7 Hz   Altitude :    0 m
           42894        42894
07248  Date : 11.06.99 04:19:16  LC : 1  IQ : 58
      Lat1 : 70.002N  Lon1 :  30.630E  Lat2 : 58.422N  Lon2 :  97.883E
      Nb mes : 013  Nb mes>-120dB : 000  Best level : -124 dB
      Pass duration : 700s   NOPC : 4
      Calcul freq : 401 649717.1 Hz   Altitude :    0 m
           44175        44175
07248  Date : 13.06.99 02:25:12  LC : 1  IQ : 58
      Lat1 : 69.933N  Lon1 :  30.710E  Lat2 : 58.632N  Lon2 :  97.162E
      Nb mes : 007  Nb mes>-120dB : 000  Best level : -125 dB
      Pass duration : 525s   NOPC : 4
      Calcul freq : 401 649711.5 Hz   Altitude :    0 m
           54965        54965

Freya
07249  Date : 13.06.99 11:56:00  LC : 1  IQ : 50
      Lat1 : 69.815N  Lon1 :  30.701E  Lat2 : 87.259N  Lon2 : 154.497E
      Nb mes : 012  Nb mes>-120dB : 000  Best level : -121 dB
      Pass duration : 608s   NOPC : 3
      Calcul freq : 401 649911.8 Hz   Altitude :    0 m
           22157        22157





Background:
	Harbor porpoises are found along the entire coast of Norway, from the
Skagerrak Sea in the southeast, into the North Sea and Norwegian Sea, and
extending into the arctic circle and the Barents Sea.  The Norwegian coast
is vast, totaling a distance of nearly 22,000 km.  It is thought that
porpoises along the Norwegian coast consist of at least two populations, or
stocks.  One in southern Norway, and one in northern Norway, or the Barents
Sea.  Currently, genetic studies are being conducted to investigate this
hypothesis, but there is little information on the movements of porpoises.
Therefore, it is not known whether porpoises from the Barents Sea area
remain there year round, or if they move southward and mix with the
porpoises living in the more southern areas.  

Project Description:
	Varangerfjord is a large fjord, north of the arctic circle, in
northeastern Norway near the border to Russia.  In this area, stationary,
wedge shaped surface nets are set for salmon that are returning from the
sea into the rivers to spawn.  These nets are set close to shore to trap
the salmon as they follow the coastline toward the rivers.  There are also
a large number of harbor porpoises inhabiting these waters due to high
concentrations of their prey species, herring and capelin.  Quite often,
porpoises are swimming very close to shore as they hunt for their prey.
Occasionally, harbor porpoises swim near the salmon nets and become
entangled.  If they are not removed, they will eventually drown.
	he goals of this project were two-fold.  The first goal was to rescue as
many porpoises as possible from the salmon nets, and the second, to fit a
few of the rescued porpoises with satellite tag transmitters in order to
follow their movements.  In the first two weeks of June 1999, researchers
from the Institute of Marine Research (IMR) in Bergen, Norway, worked in
cooperation with Varangerfjord salmon fishermen, in the area near Jarfjord,
to rescue porpoises from salmon nets and to equip them with satellite tags.
 In this two week period, a total of 8 porpoises were rescued from nets.
Three of these porpoises (two males and one female) received satellite tags.
During the field work program, researchers from the IMR traveled daily with
a small boat along a 22 km (13.6 miles) stretch of coast to check 15 salmon
nets for live porpoises.  In addition to these regular patrols by IMR
researchers, the cooperation of the Jarfjord fishermen was essential to the
success of the program.  These fishermen would check their nets 2-3 times
per day for salmon, at which time they also would inspect the nets for live
porpoises.  If a porpoise was found, it was removed from the net and
transferred to the IMR boat where it was evaluated.  Three of the 8
porpoises recovered from the nets received a satellite tag.  The protocols
used for attaching the tags are the same that have been successfully used
in the Bay of Fundy, Canada by researchers at the Duke University Marine
Lab and the Grand Manan Whale and Seabird Research Station.  
	The 3 tagged porpoises will be tracked for as long as possible to
determine if they move southward and mix with the North Sea porpoises.
This information will help to interpret the genetic studies that are
underway.  It is hoped that researchers from the Institute of Marine
Research can return to Varangerfjord in the summer of 2000, to repeat the
study.  







*************************************************
Krystal A. Tolley			
Division of Marine Mammals
Institute for Marine Research
P.O. Box 1870 Nordnes
5817 Bergen, Norway
Tel. +47-55 23 8619
Fax  +47-55 23 8617
krystal@imr.no
krystal.tolley@ifm.uib.no