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7232354 
Journal Article 
Yield- and biomass-per-recruit analysis for rotational fisheries, with an application to the Atlantic sea scallop (Placopecten magellanicus) 
Hart, DR; , 
2003 
1 
Fishery Bulletin
ISSN: 0090-0656 
NATL MARINE FISHERIES SERVICE SCIENTIFIC PUBL OFFICE 
SEATTLE 
44-57 
WOS:000180494100005 
A general model for yield-per-recruit analysis of rotational (periodic) fisheries is developed and applied to the sea scallop (Placopecten magellanicus) fishery of the northwest Atlantic. Rotational fishing slightly increases both yield- and biomass-per-recruit for sea scallops at F-MAX. These quantities decline less quickly when fishing mortality is in-creased beyond F-MAX than when fishing is at a constant rate. The improvement in biomass-per-recruit appears to be nearly independent of the selectivity pattern but increased size-at-entry can reduce or eliminate the yield-per-recruit advantage of rotation. Area closures and rotational fishing can cause difficulties with the use of standard spatially averaged fishing mortality metrics and reference points. The concept of temporally averaged fishing mortality is introduced as one that is more appropriate for sedentary resources when fishing mortality varies in time and space.