Screen 4: Reference data detail for: EMW-1003 (reference id: 1 )

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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-10031Red swamp crawfishRed swamp crawfishProcambarus clarkii21.0029.00BothTypical or common (or "frequent") weightNONEThe practice of size grading was introduced during the last decade in an attempt to increase net returns by increasing price with increasing size. Generally there are three grades: (1) peeler, less than 21 count, 0.75 ounce (21 g); (2) restaurant, between 21 and 15.5 count, 1.04 ounces (29 g); and (3) export, more than 15.5 count, corresponding to the preferred destination of each of the categories. From April though August, the smallest grade predominates, consisting of 58-73% of the total number harvested. From September through March, the percentage of the smallest grade decreases to 40-50% of those harvested, with 25% being export swamp crayfish (Procambarus clarkii)USAMore info.PRODUCTION OF THE RED SWAMP CRAYFISH IN EARTHEN PONDS WITHOUT PLANTED FORAGE: Management and PracticesMore 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.

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