Sci. Report 30- PICES - North Pacific Marine Science Organization

Report 30 (May 2005)

Micronekton of the North Pacific

Full report [pdf, 1.4 MB]

Table of Contents:

1. INTRODUCTION

1.1 Working Group History

2. SPECIES COMPOSITION AND DISTRIBUTION PATTERNS RELATED TO WATER MASSES

2.1 Mesopelagic Fishes

2.1.1 Dominant families
2.1.2 Large-scale feeding and/or spawning migration or expatriation?
2.1.3 Definition of water masses
2.1.4 Species composition

2.2 Crustacean Micronekton

2.2.1 Euphausiids
2.2.2 Mysids and decapods

2.3 Cephalopod Micronekton

2.3.1 Family Enoploteuthidae
2.3.2 Family Gonatidae
2.3.3 Family Onychoteuthidae
2.3.4 Family Pyroteuthidae
2.3.5 Other cephalopods

3. VERTICAL DISTRIBUTION PATTERNS

3.1 Mesopelagic Fishes

3.1.1 Significance of diel vertical migration
3.1.2 DVM patterns
3.1.3 Ontogenetic change in DVM patterns

3.2 Crustacean Micronekton

3.3 Cephalopod Micronekton

4. BIOMASS PATTERNS

4.1 Micronektonic Fish

5. LIFE HISTORY

5.1 Fish Micronekton

5.1.1 Age and growth
5.1.2 Production
5.1.3 Reproduction
5.1.4 Mortality

5.2 Crustacean Micronekton

5.2.1 Age and growth
5.2.2 Production
5.2.3 Reproduction and early life history
5.2.4 Mortality

5.3 Cephalopod Micronekton

5.3.1 Age and growth
5.3.2 Production
5.3.3 Reproduction and early life history
5.3.4 Mortality

6. ECOLOGICAL RELATIONS

6.1 Feeding Habits

6.1.1 Fish micronekton
6.1.2 Crustacean micronekton
6.1.3 Cephalopod micronekton

6.2 Estimating the Impact of Micronekton Predation on Zooplankton

6.2.1 Predation by micronektonic fish

6.3 Predators

6.3.1 Cephalopods
6.3.2 Elasmobranchs
6.3.3 Osteichthyes
6.3.4 Seabirds
6.3.5 Pinnipeds
6.3.6 Cetaceans
6.3.7 Human consumption

6.4 Predation Rate

6.5 Ecosystem Perspectives

6.6 Interactions between Micronekton and Shallow Topographies

7. SAMPLING CONSIDERATIONS

7.1 Net Trawling

7.1.1 Sampling gears
7.1.2 Sampling of surface migratory myctophids
7.1.3 Commercial-sized trawl sampling
7.1.4 Sampling of euphausiids and pelagic decapods

7.2 Acoustic Sampling

7.2.1 Acoustic theory and usage

7.3 Video Observations (Submersible and ROV)

8. SUMMARY OF PRESENT STATE OF KNOWLEDGE

8.1 Fish Micronekton

8.2 Crustacean Micronekton

8.3 Cephalopod Micronekton

9. RECOMMENDATIONS

10. REFERENCES

11. APPENDICES

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