Species composition and gear characteristics of the <Emphasis Type="Italic">Macrobrachium</Emphasis> fishery of the Cross River Estuary,Nigeria |
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| Authors: | Francis M Nwosu |
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| Institution: | Geospatial Analytics Laboratory, 103 PNM Building, University of South Florida, St. Petersburg,140 Seventh Ave South St. Petersburg, FL 33701, USA; Institute of Oceanography, University of Calabar, P |
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| Abstract: | The Cross River Estuary, Nigeria, is an important shrimping area for artisanal fishermen of the coastal communities. The multi-species
Macrobrachium fishery is exploited with three main gears, namely beach seine, push net and trap. Studies on species composition of this
fishery recorded thirteen shrimp species, one swimming crab (Callinectes amnicola) and two fish species (Eleotris sp. and Pellonula leonensis). The shrimp species identified included Macrobrachium macrobrachion (83.39% and 55.69% by number and weight, respectively), M. vollenhovenii (9.66% and 37.18%), M. equidens (3.8% and 2.87%), juveniles-sub-adults of Penaeus notialis (1.11% and 1.3%), M. dux, M. felicinum, Palaemonetes africanus, Palaemon maculatus, Palaemon elegans, Desmocaris sp., Leander sp., Nematopalaemon hastatus and Alpheus pontederiae. While the selectivity index for trap was 0.25, beach seine and push net had a lower index of 0.063. The results present
the first comprehensive and representative report for the Estuary shrimp fishery and will assist in the management of the
biodiversity of this ecosystem. |
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| Keywords: | species composition gear characteristics Macrobrachium fishery Cross River Estuary Nigeria |
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