Fróðskaparrit - 01.01.1992, Side 10

14
THEINTERNATIONAL RESEARCH . ..
(January-July vs. August-December)
grouping of grinds showed significant vari-
ations through times, with the January-July
proportions and the North-East bays pro-
portions being correlated. The number of
whales per grind varied seasonally, 94-126
in December-March and 158-163 in July-
August. There was clustering of the catch-
es on a weeks and days time scale, so catch-
es were not statistically independent
events. The shift in climatic and biological
conditions observed in the North Atlantic
at the end of the sixties coincided with
changes in catch statistics. Geographical
and seasonal variations in the Faroese
catches were compared between the
research period and the long term series
and some dissimilarities appeared. In par-
ticular, the summer peak of high catches
observed in July-September in the long
time series was not visible during the sam-
pling period.
The average size of landed pods
(N=148) was much greater than the size of
pods observed offshore (N=26), as also
observed off Newfoundland (Sergeant,
1962a).
Attempt is made to correlate the tradi-
tional skinn assessment with actual length,
weight and age of the whales. This would
allow the possibility of analysing time vari-
ation in life-related parameters for the
entire catch series.
Bloch, D., Desportes, G., Mouritsen, R., Debes Dahl, M.,
Skaaning, S. and Stefansson, E. 1989. Study on the ecol-
ogy and status of the long-finned pilot whale (Globi-
cephala melas Traill) off the Faroe Islands in the period
1986 to 1988. General paper. Paper SC/41/SM8 pre-
sented to the IWC Scientific Committee, May 1989
(unpublished). 1-32.
Bloch, D., Desportes, G., Mouritsen, R., Skaaning, S. and
Stefansson, E. In press. An introduction to studies on the
ecology and status of the longfinned pilot whale
(Globicephala melas) off the Faroe Islands in 1986-
1988. Rep.int.Whal.Commn (Special Issue 14).
Bloch, D., Hoydal, K., Joensen, J.S. and Zachariassen, P.
1990. The Faroese Catch of the Long-Finned Pilot
Whale. Bias shown of the 280 year time series. Joumal
of North Atlantic Studies 2(1-2): 45-46.
Bloch, D. and Joensen, H.P. in prep. The influence of abi-
otic factors prior to a grind in the Faroe Islands, and
some comments on techniques used to drive pilot
whales.
Bloch, D, Lastein, L. and Zachariassen, P. In prep.
Modeling analysis on the inside school structure of the
data on the long-term catch series of long-finned pilot
whales in the Faroe Islands.
Bloch, D, Lastein, L. and Zachariassen, P. In prep.
Zoological analysis of the ethnological data on the
long-term catch series of long-fmned pilot whales in the
Faroe Islands.
Bloch, D. and Zachariassen, M. 1989. The “skinn” values
of pilot whales in the Faroe Islands. An evaluation and
a corrective proposal. North Atlantic Studies 1: 38-56.
Hoydal, K. 1986. Data on the long-fmned pilot whale
(Globicephala melaena, Traill) in Faroe waters and an
attempt to use the 274 years time series of catches to
assess the state of the stock. Paper SC/38/SM7 present-
ed to the IWC Scientific Committee (unpublished). 1-27.
Hoydal, K. and Lastein, L. In press. Analysis of data on the
long-finned pilot whale, Globicephala melas, in Faroe
waters in relation to climatic variations. Rep. -
int. Whal. Commn (Special Issue 14).
Joensen, J.S. and Zachariassen, P. 1987. Statistics for pilot
whale catches in the Faroe Islands 1584-1640 and 1709-
-1978. Paper SC/38/SM20 presented to the IWC
Scientific Committee (unpublished). 1-22.
Skov, H., Durinck, J., Danielsen, F. and Bloch, D. In prep.
Pattems of co-occurrence of cetaceans and seabirds in
the North East Atlantic. Submitted to J. Zoogeography.
Zachariassen, P. In press. Pilot whale catches in the Faroe
Islands 1709-1992. Rep.int.Whal.Commn (Special Issue
14).
Stock identity
Use of electrophoretic markers: Isoenzyme
electrophoresis analysis performed on 31
schools showed that the allele frequencies