Live weight conversion factors and FAO product groups.

<p>The GTA data is recorded in product weight, while the FAO data is recorded in live weight. To combine information from both datasets it was necessary to convert the product weights to live weights in the GTA data. For shark fins we used an estimate based on previously published studies investigating the fin to body weight ratio of blue sharks (Prionace glauca), one of the most commonly caught species in shark fisheries (1–3). For livers/roes/milts, fish heads/fins/maws, and caviar/caviar substitutes we used the ratios for cod livers/roes suggested by the FAO’s Measures, Stowage Rates and Yields of Fishery Products publication (4). Additionally, we categorized each GTA product into the corresponding FAO ISSCAAP group. Below is a list of all products in the GTA data, the live weight conversion factors we used, the motivation behind the conversion factor, and the associated FAO product group.</p> <p>(PDF)</p>