Screen 4: Reference data detail for: EMW-331 (reference id: 3 )

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EMW idEMW ref. idFAO species categorySpeciesScientific nameLower EMW (g)Upper EMW (g)Reference indicates lower or upper EMW figure?EMW MethodSimilar species EMW idLength-weight calculations*** Fish Size Quote ****** Explanatory Notes ***Link to reference (external site)Reference documentReference url (or book)Link to Species Summary (external site)Species not given ind
EMW-3313SurmulletSurmulletMullus surmuletus231.63260.00BothAverage weight ("average","mean")NONEAn estimated mean weight range was calculated from data in table 1.

Table 1 (p5) shows catch weight and numbers for species found in hauls H1 and H2.

Mullus surmuletus.

H1 Weight = 28600 g
H1 number = 110

H2 Weight = 19920 g
H2 Number = 86.

From this data mean weights for hauls H1 and H2 were obtained as 231.63 and 260.00g respectively. From this an estimated mean weight range of 231.63 - 260.00g is taken.

Calculation detail
More info.“The feeding behavour of some demersal fish species in response to artificial discarding”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.

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. Very occasionally this link displays the home page instead of the species summary page. If this happens, enter the scientific name in the 'Genus + Species' search field to search for this species.

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