Original scientific paper
DISTRIBUTION AND SIZE OF BARNACLE Chelonibia patula FOULING BLUE CRAB Callinectes amnicola IN SOUTHEAST NIGERIA
James Philip Udoh
; Department of Fisheries and Aquatic Environmental Management, University of Uyo, Akwa Ibom, Nigeria
Aniekan Johnny Otoh
; Department of Animal Science and Fisheries, Faculty of Agriculture, Akwa Ibom State University, Obio, Akpa Campus, Oruk Anam, Akwa Ibom State, Nigeria
Abstract
The distribution and occurrence of epibionts on the dorsal carapace, ventral carapace and chela of 325 specimens of Callinectes amnicola (De Rocheburne, 1883) (103.4 – 138.7 mm carapace width) from the Qua Iboe (QIRE) and Imo River (IRE) estuaries in southeast Nigeria was determined. The only ectosymbiont observed was cirriped barnacle, Chelonibia patula, mostly of smaller sizes (2.25 mm), infesting only 25-29% of intermoult crabs, more on females and in the Imo River estuary, with an average of four barnacles per crab, presupposing low level of epibiont-host interaction. There was no significant difference (P>0.05) in spatial distribution but epibionts were highest in the dry season in low salinity IRE (0.53‰) and in wet season in the medium-salinity QIRE (17.4‰). No public health risk has been reported among crab consumers in the study area. This study highlights epibiont-host interaction in the study area largely unknown for proper management of the fishery.
Keywords
Crustacean Encrusters; Epibiosis; Infestation; Prevalence rate
Hrčak ID:
166221
URI
Publication date:
21.9.2016.
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