Ægir - 15.06.1967, Qupperneq 10

208
ÆGIR
möskvastærð botnvörpu og dragnótar, til-
raunir með gerfibeitu við línuveiðar og
tilraunir með litlar gildrur. Auk þess er
hlutverk veiðitæknirannsóknanna að fylgj-
ast með framförum í erlendri veiðitækni
og reyna það, sem hentað gæti íslenzkum
staðhátt”m.
Enda þótt segja megi, að allur tækni-
útbúnaður fiskveiðiflotans heyri undir
veiðitækni, er þó álitamál, hvort stofna
ætti sérstaka tæknideild innan Hafrann-
sóknastofnunarinnar. Til mála kæmi upp-
lýsingaþjónusta varðandi dælur, kraft-
blakkir og annað því um líkt. Auk slíkrar
upplýsingastarfsemi mætti gera tilraunir
með hljóðmælingar í sjó til að kanna
hljóðstyrkleika skipsvéla í sjónum um-
hverfis skipið og áhrif hans á flótta síld-
arinnar eða annarra fiska. Skylt er að geta
þess, að Fiskifélag Islands hefur í hyggju
að hefia slíkar hljóðmælingar innan
skamms. Eins og kunnugt er rekur sama
félag ennfremur upplýsingaþjónustu í
notkun fiskrita og annarra fiskileitar- og
siglingatækja. Slík starfsemi er mjög lofs-
verð. Framtíðin verður að skera úr um
það, hvort og hjá hvaða stofnun slík tækni-
leg upplýsingaþjónusta verður sameinuð.
Að síðustu skal tekið fram, að þýðing
veiðitæknirannsókna Hafrannsóknastofn-
unarmnar byggist að öllu leyti á náinni
samvinnu við sjómenn, útgerðarmenn,
netagerðarmenn og tækni- og verkfræð-
inga. Áhugi og vilji Hafrannsóknastofn-
unarinnar til gagnlegs samstarfs er í rík-
um mæli fyrir hendi.
Heimildarit: v. Brandt, A. 1964: Fishing
methods and gear research Institutes: Their or-
ganisation and scope. Modern Fishing Gear of
the World II pp 489—493. London.
Summary: The author is a fishery-bio-
logist from the University of Kiel, Fed.
Rep. of Germany, which after his examina-
tion in summer 1964 has worked for three
years in Hamburg at the ‘Tnstitut fiir
Fangtechnik". Now he is engaged at the
Marine Research Institute in Reykjavik
in fishing gear research.
The scope and aim of fishhig gear re-
search institutes are described generally.
The author refers to an article by one of
the pioneers of the modern fishing gear re-
search, Prof. A. von Brandt, Germany.
The author then deals with the object
of the new Icelandic gear research. These
are some of the most important problems:
1) Experiments on the sinking speed of
purse seines. As the Icelandic purse sein-
ers are trying to catch herring schools
rather deep below the surface there is a
growing tendency to design deeper seines.
To avoid the increased dimensions of
the seines, a new technique has been
developed. By this method increased
lead weight submerges even the float-
line, so that the submerging power
of the seine has to be stopped through
the pursing. As the sinking speed and also
the fishing depth of the different seines
is unknown, it will be of great value to
measure the sinking speed. These mea-
surements will be carried out by a time-
depth recorder (hydrokymograph) which
will be tied to the seine. This apparatus
makes a diagram which shows the depth
in proportion to time.
2) Material testing. There is for the
moment no institution which deals with
testing of materials in Iceland, although
such investigations are very important to
the Icelandic fisheries.
3) Midwater trawling on herring. The
Icelandic fishery on herring with mid-
water trawls has practically only been on
an experimental stage. This fishing meth-
od might nevertheless be of importance to
the trawlers for a certain part of the year.
4) Behaviour. The factors which in-
fluence the behaviour against active and
passive gears are mentioned (i.e. tempera-
ture, spawning, visibility in the sea, the
dimensions and thickness of the schools
etc.) As the knowledge of the behaviour
of the fish is very important for the fish-