Screen 4: Reference data detail for: EMW-129 (reference id: 1 )

   Help   Home
EMW idEMW ref. idFAO species categorySpeciesScientific nameLower EMW (g)Upper EMW (g)Reference indicates lower or upper EMW figure?EMW MethodLength-weight calculations*** Fish Size Quote ****** Explanatory Notes ***CountryLink to reference (external site)Reference documentReference urlLink to Species Summary (external site)
EMW-1291Nile tilapiaNile tilapiaOreochromis niloticus250.00350.00BothWeight or weight rangeNONEP192. "There are two cage-farming companies in Ghana: Crystal Lake Fish Ltd. and Tropo Farms Ltd. Both are situated in Lake Volta, one of the world's largest man-made lakes.
Established in the late 1990s in the Asuogyaman District of Ghana's Eastern Region, Crystal Lake Fish Ltd. grows indigenous tilapia (O. niloticus) in ponds and concrete tanks (breeding and juveniles) and cages (grow-out to market size)..."
P193. "Oreochromis niloticus is indigenous in Ghana...
Tropo has a pilot-scale cage site with eight cages of 40 m3 each...Juveniles of 10g are transferred to the cage site from Tropo's pond site... and are currently being grown to a market size of around 350g..."
P194 "Tropo's market size is around 350 g, while at Crystal Lake, the fish are grown to market size of around 250 g...."
Data from this reference document has been used for the following ref ids pertaining to this EMW: 1,2,3,4.GhanaMore info."Cage aquaculture: regional reviews and global overview". FAO fisheries Technical Paper 498. Edited by Matthias Halwart, Doris Soto, J. Richard Arthur. FAO 2007.More infoMore info.

This screen gives details for an individual reference obtained in estimating a mean weight for this species.

The information obtained from this reference to derive an estimated mean weight is in the *** fish size quote *** and/or *** Explanatory notes *** column. Note that you may need to search the document using key words in the '*** Fish Size Quote ***' or *** Explanatory notes *** column to find the relevant fish size data. To view the reference document itself (if available online): scroll right and click on 'More info' in the 'Link to reference' column, if available. If the reference has moved, you may find it by entering part/all of the title into google.

Where the information obtained from the reference is a fish length, the calculations performed to obtain a weight may be viewed by clicking on 'More info' in the 'Length-weight calculations' column.

To view the 'Species Summary' page on for this species, click on 'More info' in the 'Link to Species Summary ' column.

For explanation of the columns in the above table click on Help