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.

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.

The top 20 species encountered, by weight, are: Pandalus jordani, Pink Shrimp (Smooth); Glyptocephalus zachirus, Rex Sole; Squalus suckleyi, North Pacific Spiny Dogfish; Lyopsetta exilis, Slender Sole; Microstomus pacificus, Dover Sole; Hydrolagus colliei, Spotted Ratfish; Thaleichthys pacificus, Eulachon; Pandalus eous, pink Shrimp (Spiny); Hippoglossoides elassodon, Flathead Sole; Atheresthes stomias, Arrowtooth Flounder; Citharichthys sordidus, Pacific Sanddab; Merluccius productus, Pacific Hake; Gadus Chalcogrammus, Walleye Pollock; Lycodes pacificus, Blackbelly Eelpout; Anoplopoma fimbria, Sablefish; Inanimate object(s), Inanimate Object(S); Pandalopsis dispar, Sidestripe Shrimp; Parophrys vetulus, English Sole; Eopsetta jordani, Petrale Sole; Raja (Beringraja) rhina, Longnose Skate. In at least the last 10 years, all species are identified to the highest taxonomic level possible.

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

Pacific coast of Canada