1999 

 OUR LIVING OCEANS 



Midwater trawl catch of Pa- 

 cific wfiitmg, Oregon coast. 



Part 3 presents in greater detail the biological status ot LMRs in 2S separate units. 

 These unit synopses describe important species or species groups that are linked geographi- 

 cally, ecologically, or by characteristics ot their fisheries. 



Part 4 includes appendices for acknowledgments, regional FMCs and FMPs, princi- 

 pal NMFS hicilities around the country, stock assessment prniciples and terms, a detailed 

 (but not exhaustive) listing ot the scientific and common names ot species covered in this 

 report, and acronyms and abbreviations. 



COMMON TERMS 



Most of the technical terms or phrases used in this report are defined in Appendix 4; 

 the most important are reviewed here. 



Stock ideally refers to a biologicalh' distinct group ot organisms that are genetically 

 related or reproductively isolated trom other segments ot a larger population. Since stocks 

 intermix in the marine ecosystem, it may be necessary to consider all of the individuals ot 

 a species, or several co-occurring species within a geographical area, as one tishery stock 

 when it is impractical to differentiate between them. Thus, a stock unit detuied tor tishery 

 management purposes may not necessarily correspond to a discrete genetic unit. 



Recent average yield (RAY) is equivalent to the recent catch history. RAY is the re- 

 ported fisher}' landings averaged tor the most recent 3-year period ot workable data, usu- 

 ally 1995-97, unless otherwise indicated. 



Current potential yield (CPY) is the potential catch that can be taken depending on 

 the current stock abundance and prevailing ecosystem considerations.^ I his term is analo- 

 gous to acceptable biological catch (ABC) that is speciticd in some FMPs. 



lor manv stocks, LTPY or (_'PY iiki\ Iu- unknown, tor tlic purpost.- of reporting tot.il LTPY and CPY across 

 resources within the various fishery units and tor the Nation as a whole, if (^I'Y was unknown RAY was 

 substituted when calculating a unit, regional, or national total (^P^'. If ITPY was unknown ( V\ was siihsii- 

 tutcd, or, failing that, RAY was substituted in calculating totals. 



