Environmental Engineering Reference
In-Depth Information
Table 3.4
(continue
d)
Species
Pocharam Lake
Sl. no.
Wyra Lake
47.
C. reticulates
Daday
+
−
48.
Alona rectangula rectangula
Sars
+
+
49.
A. rectangula richardi
(Stingelin)
+
+
50.
A. davidi davidi
Richard
+
+
51.
A. davidi punctata
(Daday)
−
+
52.
A. costata
Sars
+
−
53.
A. pulchella
King
−
+
54.
Kurzia longirostris
Daday
+
−
55.
Camptocercus rectirostris
Schoedler
−
+
were compared. The shallow littoral regions and
also nearby limnetic zones play a host to a wide
variety of the two zooplankton communities
under study, viz. Rotifera and Cladocera. Rotifera
(34 species) ranked one in order of abundance
followed by cladocerans (21 species) in both
lakes. There are 34 species belonging to 14 gen-
era of Rotifera and 21 species belonging to 11
genera in both lakes. In Pocharam Lake 24 spe-
cies belonging to 9 genera of rotifers and 11 spe-
cies belonging to 5 genera of cladocerans were
observed, whereas in Wyra Lake 20 species
belonging to 10 genera of rotifers and 16 species
belonging to 9 genera of cladocerans were
noticed. There are also 10 species belonging to 6
genera to rotifers and 6 species belonging to 3
genera of cladocerans that are commonly avail-
able in both lakes.
Among the Cladocera, chydorids, which are
well known to occur in littoral vegetated zone of
freshwaters in general, have dominated qualitatively
in both lakes. The species like
Moina micrura,
Chydorus parvus, C. reticulates, Alona costata
and Kurzia longirostris
are available in Pocharam
Lake only. Of the 24 species of rotifers available
in Pocharam Lake,
Brachionus angularis,
B. caudatus, B. calycifl orus
f.
anuraeiformis,
B. calycifl orus borgerti, B. calycifl orus
var.
dorcas, B. plicatilis, Lecane (L) lauterborni, L.
(L) luna, L. (L) papuana, L. (L) ungulata,
Trichocerca pusilla, Asplanchnopus bhimavara-
mensis
, Filinia opoliensis
and
F. terminalis
are
available in Pocharam Lake only.
The species like
Brachionus calycifl orus
var.
hymani, B. patulus, Macrochaetus serica,
Lepadella ovalis, Lecane (L) luna, L. (M)
clostocerca, L. (M) tethis, Cephalodella
sp. and
Testudinellidae patina
are available in Wyra Lake
only. Similarly, the cladocerans like
Diaphanosoma
sarsi, Ceriodaphnia cornuta, Scapheloberis kingi
,
Macrothrix spinosa, Echinisca triserialis, Chydorus
sphaericus, Alona davidi punctata
(Daday),
Alona
pulchella
King and
Camptocercus rectirostris
are
available in Wyra Lake only.
In Wyra Lake the rotifers showed high diver-
sity represented by families, viz. Brachionidae,
Mytilinidae , Trichocercidae , Colurellidae,
Lecanidae, Notommatidae and Testudinellidae ,
out of which Brachionidae and Lecanidae
equally dominated with eight species each and
the rest are representatives only. Among the cla-
docerans in Wyra Lake, chydorids have domi-
nated with nine species, and the rest are
representatives only.
Rotifers formed the most dominant plankters of
Pocharam Lake and showed higher diversity and
are represented by families, viz. Brachionidae
(nine species), Mytilinidae, Trichocercidae,
Asplanchnidae and Testudinellidae (one species
each), Lecanidae (six species) and Filinidae
(two species). Cladocerans in Pocharam Lake
were represented by the families Chydoridae
(nine species), Moinidae and Macrothricidae
(one species each).
Among the Rotifers in Pocharam Lake, bra-
chionids dominated the rest of the taxa, repre-
sented by three genera, viz.
Brachionus, Keratella
and Platyias.
Out of the three brachionid genera,
Brachionus
was constituted by eight species with
three varieties/forms; the genera
Keratella
and
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