Publication Date:
2021-05-19
Description:
Feeding strategy of blue swimming crab (Portunus pelagicus) was investigated monthly in Khuzestan
province water from April-2016 to march-2017. Samples were catch by trawl net. The content of P.
pelagicus stomachs, percentage of occurrence frequency and Frequency percentage of feeding items
was checked. In crab stomachs different feeding items group such as crustacean, mollusks, sponges,
phytoplanktons, corals, fish, sand particles and etc. Was observed. The highest frequency of
occurrence belonging to sponges, crustaceans and mollusks, respectively. Furthermore, Frequency
percentage of sponges (38.65%) was higher than other preys. Costello's graphical model analysis
Results analysis of P. pelagicus stomach content by Costello's model showed that this crab is a
predator with specific feeding nich and feeding specific prey include sponges, crustacean and mollusks
during a year. Though, it's feeding pattern show few seasonally fluctuations. In this model,
phytoplanktons, fish, polycheats, corals, nematode, protista, ctenophore, nematodes, cestod, sea
insects and sand identified as accidental or rare prey. Probably, ingest by crab while feeding from
specific prey.
Description:
Published
Keywords:
Feeding
;
Blue swimming crab
;
Portunus pelagicus
;
Coastal water
;
Prey importance
;
Feeding items
;
Frequency percentage
;
Frequency of occurrence
;
Phytoplanktons
;
Corals
;
Fish
Repository Name:
AquaDocs
Type:
Journal Contribution
,
Refereed
Format:
pp.37-46
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