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- Depositor
- Karen Dykes
- Date Uploaded
- 2021-12-08
- Date Modified
- 2021-12-08
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- passed on August 08, 2024 at 14:06
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- This change of habitat is often accompanied
by change in physical + biol. [biological] eg [for example] diapause
requirements, breeding season, + thus acts as a
stimulus to divergence into forms, rows etc.
Then went to the session on
Deep Sea Biol. [Biology] I missed the discussion
on the work arriving from the Bathyscaphe
but heard some interesting papers
on the Russian Deep Sea studied in the
N. [north] Pacific. L. Zenbrevitch gave his in
french + then [Boris] Vinogradovs in german
both a dead loss to me. Mrs Z.G. Stachedrina [?]
of Leningrad gave a paper on deep water
forms in inaudible English.
Madam Z.A. Filatova of Moscow gave
a very interesting paper on deep
water bivalves of the N. [north] Pacific in
which she showed that they were of small
size - very slow growing with a biomass
of only perhaps 2 grams/sp. [species] N. [number?]) representing
an accumulation of perhaps 10 yrs. [years]
Filter feeders very scarce, mostly detritus.
All are of the most primitive order. In the
sub littoral temp [temperature] is often the limiting
factor in distribution however in very deep
water it is food + secondarily reproductive
pattern. Widely separated deep trenches often
had separate species, those closer together
did not. Thus indicating the reproductive
isolation. Species of Spinula [underlined] were
most common followed by Astarte [underlined]
Yoldia [underlined] etc.
The Russian explorations have brought to
light many interesting isopods some very
primitive others, according to Wolff highly
specialized.
They have taken living creature to
10,700 M [meters] + Liparids [Liparidae] + Careproctus amblystomopsis
to 7600 M [meters]. Included their chart of
depth distribution.
In the display I note the
following A. MacFadyen of Swansea
a new respirometer for use with
small invertebrates. This runs for
long periods with electronic control +
recording.
A.P. Wells of London had a display
of featuring ecological
separation.
Two students from Colorado had
interesting displays. By tethering [female symbol]
swallowtails they were able to study
the discrimination of species for each
other.
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