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MANUAL for SAMPLING of FISH and CRUSTACEANS Version 1.0

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MANUAL for SAMPLING of FISH and CRUSTACEANS Version 1.0 MANUAL FOR SAMPLING OF FISH AND CRUSTACEANS version 1.0 Editors Hildegunn Mjanger, Knut Hestenes, Erik Olsen Bjørn Vidar Svendsen and Thomas De Lange Wenneck December 2006 This manual is translated from the Norwegian version 3.15 and is therefore available in Norwegian / Denne håndboken er også tilgjengelig på norsk: Håndbok for prøvetaking av fisk og krepsdyr. Institute of Marine Research, Quality system Department of Marine Resources, Manual for sampling of fish and crustaceans TABLE OF CONTENTS Objektive……………………………………………………………………………………..2 Contents..……………………………………………………………………………………..2 Critical factors………………………………………………………………………………..4 Introduction.………………………………………………………………………………….4 Acnowledgements…………………………………………………………………………….4 Relevant Literature…..………………………………………………………………………5 1. SAMPLING OF FISH AND CRUSTACEANS..................................................... 6 1.1 General ............................................................................................................................................... 6 1.2 Filling in Fishing Station Form S ..................................................................................................... 7 1.3 When the catch is on deck................................................................................................................. 7 1.4 Sorting, weighing and counting........................................................................................................ 8 1.5 About the SAMPLE concept............................................................................................................ 8 1.6 Filling in the T-form.......................................................................................................................... 9 1.7 Sampling........................................................................................................................................... 11 1.8 Filling in the length frequency form U.......................................................................................... 12 1.8.1 Table 1. Length intervals used for selected species........................................................................... 12 1.9 Filling in the specimen form V ....................................................................................................... 13 1.9.1 Table 1. Variables measured in individual sampling of pelagic species ......................................... 14 1.9.2 Table 2. Variables measured in individual sampling of demersal species........................................ 15 1.9.3 Table 3. Variables measured in individual sampling of crustaceans. ............................................... 16 1.10 Species-specific sampling instructions ........................................................................................... 17 1.10.1 Cephalopods in Norwegian Sea surveys....................................................................................... 17 1.10.2 Greenland halibut (Reinhardtius hippoglossoides)....................................................................... 17 1.10.3 Sprat (Sprattus sprattus) ............................................................................................................... 17 1.10.4 Whiting (Merlangius merlangus) ................................................................................................. 17 1.10.5 Haddock (Melanogrammus aeglefinus)........................................................................................ 18 1.10.6 Blue whiting (Micromesistius poutassou)..................................................................................... 18 1.10.7 King crab (Paralithodes camtschatica) ........................................................................................ 18 1.10.8 Salmon, trout and rainbow trout (Salmo salar, salmo trutta and salmo gairdneri)...................... 19 1.10.9 Capelin (Mallotus villosus)........................................................................................................... 21 1.10.10 Mackerel and horse mackerel (Scomber scombrus and Trachurus trachurus)............................. 21 1.10.11 Jellyfish on Norwegian Sea surveys ............................................................................................. 21 1.10.12 Polar cod (Boreogadus Saida) ...................................................................................................... 22 1.10.13 Deep sea shrimp (Pandalus borealis) ........................................................................................... 22 II Institute of Marine Research, Quality system Department of Marine Resources, Manual for sampling of fish and crustaceans 1.10.14 Saithe (Pollachius virens)............................................................................................................. 27 1.10.15 Herring (Clupea harengus)........................................................................................................... 27 1.10.16 Sandeel family (Ammodytidae)..................................................................................................... 28 1.10.17 Small fish on Norwegian Sea surveys .......................................................................................... 28 1.10.18 Cod (Gadus morhua) .................................................................................................................... 28 1.10.19 Scorpion fishes, (Scorpaenidae) ................................................................................................... 29 1.10.20 Greater argentine (Argentina silus)............................................................................................... 29 1.10.21 Norway pout (Trisopterus esmarkii)............................................................................................. 30 1.10.22 Norway lobster (Nephrops norvegicus) ........................................................................................ 30 1.10.23 Anglerfish (Lophius piscatorius) .................................................................................................. 30 1.10.24 By-catch of sea mammals ............................................................................................................. 30 1.11 Collection of otoliths and scales...................................................................................................... 31 1.11.1 Scales............................................................................................................................................ 31 1.11.1.1 Scales from Scorpion fish ........................................................................................................ 31 1.11.2 Otoliths ......................................................................................................................................... 31 1.11.2.1 Sprat, Capelin, Herring, Sandeels, Argentines........................................................................ 32 1.11.2.2 Blue whiting............................................................................................................................. 32 1.11.2.3 Salmon, trouth and rainbow trout............................................................................................. 32 1.11.2.4 Mackerel .................................................................................................................................. 33 1.11.2.5 Polar cod .................................................................................................................................. 33 1.11.2.6 Greenland halibut, whiting, haddock, saithe, cod, redfishes (Scorpionfishes), Norway pout. 33 1.11.2.7 Anglerfish ................................................................................................................................ 33 1.12 Age reading of otoliths and scales .................................................................................................. 34 1.12.1 General.......................................................................................................................................... 34 1.12.2 Sprat.............................................................................................................................................. 34 1.12.3 Whiting, haddock, saithe, cod, Norway pout................................................................................ 35 1.12.4 Blue whiting.................................................................................................................................. 35 1.12.5 Capelin.......................................................................................................................................... 36 1.12.6 Mackerel ....................................................................................................................................... 37 1.12.7 Polar cod....................................................................................................................................... 37 1.12.8 Herring.......................................................................................................................................... 37 1.12.9 Argentine ...................................................................................................................................... 37 1.13 Sampling from industrial fisheries................................................................................................. 37 2. PROCEDURES FOR ANALYSIS OF FISH STOMACHS................................ 39 2.1 How to do the sampling
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