Náttúrufræðingurinn - 1975, Blaðsíða 10

20/8
APATANIA ZONELLA
POTOMOPHYLAX CINCULATUS
•)
Dagsttning/Date
Staður/ Locality
pH
23/8 23/8
6.9 6.3-6.6 5.8-6.7
28/4 14/5 29/4 6
5/9
7.3-7.8 6.7 7.7-8.6
17/4 22/6 & 23/1 -
10/8 27/12
7.3 8.5-9.1 7.6-8.3
21/5 21/5 21/5 21/5
6.8 7.2 6.7 6.9
Leiðni v/25°C
Conductivity at 44 53 59 79 87 92 99 101 214 40 39 40 53
25°C (iimho)
pH tvið/ pH range
Leiðniavið v/25°C 25 - 298 39 - 153
Conductivity range at 25 C (jimho)
c) Selta/ Salinity (°/oo)
Lón við Syðralón. 20/6/74 _ , 2
A lagoon at 66013’N, 15°22'W
‘ LárvaSall. 16/8/74 0.9
A lagoon at 64057'N, 23°25'W
Súgandafjarðarbotn. 21/8/74 1,6
A lagoon at 66°05'N, 23°22'W
Öaaáróa Patrekafirði um
atóratraumaflóð. 23/8/74 17,7
An estuary at 65°32'N, 23°47'W
durlng high sprlng tide
4. mynd. a) Efnasamsetning nokkurra straumvatna, sem lirfur Apatania zonella
Zetterstedt og Potamophylax cingulatus (Stephens) lifa í. Aðaljónir eru táknað-
ar sem lilutfall af jónum alls. Sýnin vou tekin 1974, nema úr Varmá hjá Hvera-
gerði, þar er sýnt meðaltal sýna, sem voru tekin mánaðarlega 1973 og birtust
í skýrslu eftir Sigurjón Rist (1974). b) Sýrustigs- (pH) og rafleiðnisvið straum-
vatna, sem áðurnefndar tegundir hafa fundizt í. c) Selta nokkurra ísaltra vatna,
sem tegundirnar hafa fundizt í.
a) Chemical composition of water of a few slreams where Apatania zonella
Zeltersledl and Potamophylax cingulatus (Stephens) occur. Major ions expressed
as percentage of total ions. Water samples were talien in 1974, except in "Varmá
hjá Hveragerði”, which is a mean of samples taken every month during 1973
and was published in Rist (1974). b) pH and conductivily range of streams
where the two above species occur. c) Salinity of a few brackish waters where
the species were found.