“…Recent reports indicated the existence of an organized criminal network in the Caspian regions, which have an important role in the illegal exploitation and trade of sturgeon caviar because of factors such as scarcity, the high prices paid for caviar, social instability, corruption, and defects in the monitoring and control systems (van Uhm & Siegel, ; Zabyelina, ). Using questionnaires, face‐to‐face interviews with fishers and experts, and other similar approaches have been reported as reliable methods to determine the drivers of non‐compliance with fishing regulations, as well as to estimate catch volumes, species composition, and by‐catch in Africa (Gandiwa, ; Luomba, Chuenpagdee, & Song, ), North America (Blank & Gavin, ; Lancaster, Dearden, & Ban, ; Walker et al, ), Europe (Moutopoulos, Dimitriou, Katselis, & Koutsikopoulos, ), and Asia (Daliri, Kamrani, Jentoft, & Paighambari, ; Pramod, ; van Uhm & Siegel, ).…”