Publication Date:
2021-05-19
Description:
Menmiopsis leidyi was entered into Caspian Sea from Black Sea and mass population constitutes in the
southern Caspian Sea. In this surveys, the relationship between length and wet weight measured and length and
weight followed by this equation: n= 384, R^
2=0.87 w= 0.003 L^ 9005
. The relationship of dry and wet weight calculated, in this surveys, the ratio of dry weight to wet weight
was equal to 1.615% in 12 salinity. In vitro, the clearance rate at 12 and 27 C were 52.48 and 107.33 ml/h, respectively, daily ration at above temperatures were 1.98 and 16.65 respectively. Mnemiopsis leidyi can feed
Acartia in accordance to 16.5 mg/1gbw (body weight) at 27 C
in one day. The average digestive time in 12 C
and 27 C were 77.50 min and 36 min respectively. The digestive
value in 27 C was 2.5 fold than 12 C
. The result indicated that clearance rate, daily ration and digest were
increased in high temperature.
Stomach content of Mnemiopsis leidyi was shown that this organism utilized from Acartia and Balanus, in addition, stomach content of kilka including two species of zooplankton from the southern Caspian Sea. Stomach contents of clupeonella cultiventris contain more than 54 percent of Acartia and its nauplii. This
frequency observed in cluponella engrauliformis and clupeonella grimmi. On basis of zooplankton sampling in
the sea, over 90 percentage of zooplankton populations contain Acartia.
Description:
Iranian Fisheries Science Research Institute
Description:
Published
Keywords:
Menmiopsis leidyi
;
Zooplankton
;
Population
;
Survey
;
Feeding
;
Cetenophora
Repository Name:
AquaDocs
Type:
Report
,
Refereed
Format:
45pp.
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