xpeditiontoSvalbardoftheMax-Planck-

xpedition
to
Svalbard
of
the
Max-Planck-Institute
of
Limnology
in 1975
work
was
carried
out
on
the
distribution
and
ecology
of
Cladocera
in
arctic
inland
waters.
Results
on
the
distribution
of
the
6
Cladocera
species
in
the
entire
archipelago
and
with
consideration
to
the
different
types
of
biotopes
were
given
earlier
(HUSMANN,
JACOBI,
MEIJERING
&
REISE 1978).
More
detailcd
results
from
Bear
Island
on
the
same
subject,
together
with
items
on
the
general
limnology
of 35
waters,
investigated
on
the
island,
have
already
been
published
(JACOBI
&
MEIJERING
1978).
It
was
pointed
out,
that
the
3
main
species,
Daphnia
pulex,
Macrothrix
hirsuticortiis
and
Chydorus
spluiericus,
were
found
in
several
stable
populations.
In
other
sites,
the
occurrence
was
just
sporadical,
and
finally
there
were
waters
without
one
species
or
the
other.
Chemical
differences
between
the
sites
were
too
small,
as
that
they
could
be
regarded
to
be
responsible
for
the
patterns
of
distribution.
So a
closer
Io
ok
at
the
biology,
life
cycles
and
timing
of
the
Cladocera
was
desirable,
In
the
present
paper
Macrothrix
hirsuticornis
will
be
dealt
with
from
an
ecophysiological
point
of
view.
Laboretory
experiments
on
this
species
were
carried
out
in
order
to
get
a
lead
for
an
-analysis
of
population
development
of M.
tiit-
suiicornis
in
Spitsbergen
and
on
Bear
Island
.
•

Hasil (Bahasa Indonesia) 1:

XpeditionuntukSvalbarddariTheMax-Planck-InstitutdariLimnologipada tahun 1975bekerjaadalahdilakukankeluarpadaThedistribusidanekologidariKutu airdalamArktikpedalamanperairan.HasilpadaThedistribusidariThe6Kutu airspesiesdalamTheseluruhKepulauandandenganpertimbanganuntukTheberbedajenisdaribiotopitudiberikansebelumnya(HUSMANN,GEREJA,MEIJERING&REISE 1978).LebihdetailcdhasildariBeruangPulaupadaThesamasubjek,bersama-samadenganitempadaTheUmumLimnologi35perairan,diselidikipadaThePulau,memilikisudahtelahDiterbitkan(GEREJA&MEIJERING1978).Ituadalahmenunjukkeluar,yangThe3utamaspesies,Daphniapulex,MacrothrixhirsuticortiisdanChydorusspluiericus,ituditemukandalambeberapastabilpopulasi.Dalamlainnyasitus,Theterjadinyaadalahhanyasporadical,danakhirnyaadaituperairantanpasalah satuspesiesatauThelain.KimiaperbedaanantaraThesitusituterlalukecil,sebagaiyangmerekabisamenjadidianggapuntukmenjadibertanggung jawabuntukThepoladaridistribusi.JadidekatIOOkediTheBiologi,kehidupansiklusdanwaktudariTheKutu airadalahdiinginkan,DalamThehadirkertasMacrothrixhirsuticornisakanmenjadiditanganidengandarianecophysiologicaltitikdariLihat.Laboretorypercobaanpadainispesiesitudilakukankeluardalamurutanuntukmendapatkanamemimpinuntukan-analisisdaripopulasipengembanganm.tiit-suiicornisdalamSpitsbergendanpadaBeruangPulau.•