Publication Date:
2021-05-19
Description:
The abundance and biomass of benthic macroinvertebrates were studied in the place of fish cage culture in
southern coasts of Caspian sea (Mazandaran waters- kelarabad). The goal of this study was to consider of fish
cage culture effects on the abundance and biomass of benthic macroinvertebrates. The sampling was carried out
in 3 stations in depth of 20 meter of Kelarabad waters monthly. In this study 7 species were identified belonged
to 5 genus of 4 family. Totally 23442 sample of benthic invertebrates were counted that the lowest and highest
abundance were in station 1(23.4%) and station 2(46.8%) respectively. The results of stations study showed that
the highest abundance and biomass were in stations 2 and 3 with the average of 646 ± 1230.4 n/m2 and 0.526 ±
1.001 gr/m2 respectively. This coulld be respectively dependant to not settling of cage (witness station) and
appearance of Cerastoderma glaucum because of its large body in station 1. The difference of abundance and
biomass between different stations was not significant (p ›0.05). The study on abundance and biomass in
different seasons showed that the highest abundance in autumn with the avarage of 888.13 ± 1371.58 n/m2
belonged to Strblospio gynobranchiata and the highest biomass belonged to C. glaucum which was because of
appearance of not native species of polychaeta and also the species with shell covering from bivalvia. The
results showed that the specie of S. gynobranchiata from polychaeta including 93.3% of abundance was the
dominant specie that could be related to appropriate ecological conditions for living and high adaptability.It was
concluded that the abundance and biomass of benthic macroinvertebrates in station 1 was lower than other
stations which was related to fish cage culture activity and its effects on benthic macroinvertebrates. So it is
suggested that each mariculture activity in southern coasts of Caspian sea should be carried out with regarding to
environmental considerations and performance of comparative evaluation project of environmental effects.
Description:
Iranian Fisheries Science Research Institute
Description:
Published
Keywords:
Marine Cages
;
Benthic Macroinvertebrates
;
Abundance
;
Biomass
;
Cerastoderma glaucum
;
Strblospio gynobranchiata
;
Species
Repository Name:
AquaDocs
Type:
Report
,
Refereed
Format:
38pp.
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