Pacific Multispecies Small Mesh Bottom Trawl Survey

Study Extent

A stock assessment program for the shrimp trawl fishery was developed concurrently with the change in management strategy implemented in 1997. Surveys were conducted in selected shrimp areas in 1997 and 1998 to obtain reliable biomass indices of abundance for key stocks.

Sampling

The shrimp trawl fishery in British Columbia catches 7 species of shrimp belonging to the family Pandalidae.

Quality Control

Scientific names associated with resource occurrence records have been mapped to recognized standards - marine taxa have been mapped to the World Register of Marine Species (WoRMS). The WoRMS codes, the AphiaIDs have been included as LSIDs in the occurrence record DwC field scientificNameID. Data were filtered for normal tows only from the original dataset ("Normal tow, no problems or unusual conditions noted or remarked on"). Unknown and inanimate objects were removed from the occurrences.

Method steps

1. To prepare this dataset for OBIS Canada publication, data was structured into an OBIS-compatible format using R and laid out in four tables: an Event Core, Occurrence Core and three Extended Measurement of Fact extensions. Defined vocabularies listed on the Natural Environment Research Council (NERC) Vocabulary Server (NVS) were used whenever possible.

1. Animalia
   rank: kingdom
2. Protozoa
   rank: kingdom
3. Chordata
   rank: phylum
4. Mollusca
   rank: phylum
5. Annelida
   rank: phylum
6. Sipuncula
   rank: phylum
7. Porifera
   rank: phylum
8. Brachiopoda
   rank: phylum
9. Ctenophora
   rank: phylum
10. Platyhelminthes
    rank: phylum
11. Echinodermata
    rank: phylum
12. Mesozoa
    rank: phylum
13. Chordata
    rank: phylum
14. Nemertea
    rank: phylum
15. Pogonophora
    rank: phylum
16. Hemichordata
    rank: phylum
17. Chordata
    rank: phylum
18. Arthropoda
    rank: phylum
19. Actinopterygii
    rank: class
20. Anthozoa
    rank: class
21. Ascidiacea
    rank: class
22. Asteroidea
    rank: class
23. Aves
    rank: class
24. Bivalvia
    rank: class
25. Branchiopoda
    rank: class
26. Calcarea
    rank: class
27. Cephalopoda
    rank: class
28. Clitellata
    rank: class
29. Crinoidea
    rank: class
30. Demospongiae
    rank: class
31. Echinoidea
    rank: class
32. Elasmobranchii
    rank: class
33. Florideophyceae
    rank: class
34. Gastropoda
    rank: class
35. Hexactinellida
    rank: class
36. Hexanauplia
    rank: class
37. Holocephali
    rank: class
38. Holothuroidea
    rank: class
39. Hoplonemertea
    rank: class
40. Hydrozoa
    rank: class
41. Ichthyostraca
    rank: class
42. Magnoliopsida
    rank: class
43. Malacostraca
    rank: class
44. Myxini
    rank: class
45. Ophiuroidea
    rank: class
46. Petromyzonti
    rank: class
47. Phaeophyceae
    rank: class
48. Pilidiophora
    rank: class
49. Polychaeta
    rank: class
50. Polyplacophora
    rank: class
51. Scaphopoda
    rank: class
52. Scyphozoa
    rank: class
53. Thaliacea
    rank: class
54. Turbellaria
    rank: class

Pacific coast of Canada