S C C S. Research Document 2004/108 Document de recherche 2004/108. R. Branton and G. Black

Transcription

1 C S S Canadian Science dvisory Secretariat S C C S Secrétariat canadien de consultation scientifique Research Document 24/8 Document de recherche 24/8 Not to be cited without Permission of the authors * Ne pas citer sans autorisation des auteurs * 24 Summer Groundfish Survey update for selected Scotia-Fundy groundfish stocks. Mise à jour du relevé de l été 24 sur les poissons de fond pour les stocks particuliers du plateau néo-écossais et de la baie de Fundy. R. ranton and G. lack Department of Fisheries and Oceans Maritimes Region, Science ranch edford Institute of Oceanography Challenger Drive, Dartmouth Nova Scotia, 2Y 42 Canada * This series documents the scientific basis for the evaluation of fisheries resources in Canada. s such, it addresses the issues of the day in the time frames required and the documents it contains are not intended as definitive statements on the subjects addressed but rather as progress reports on ongoing investigations. Research documents are produced in the official language in which they are provided to the Secretariat. * La présente série documente les bases scientifiques des évaluations des ressources halieutiques du Canada. Elle traite des problèmes courants selon les échéanciers dictés. Les documents qu elle contient ne doivent pas être considérés comme des énoncés définitifs sur les sujets traités, mais plutôt comme des rapports d étape sur les études en cours. Les documents de recherche sont publiés dans la langue officielle utilisée dans le manuscrit envoyé au Secrétariat. This document is available on the Internet at: Ce document est disponible sur l Internet à: ISSN (Printed / Imprimé) Her Majesty the Queen in Right of Canada, 24 Sa Majesté la Reine du Chef du Canada, 24

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3 bstract synopsis of the results of the 24 DFO summer bottom trawl survey on the Scotian Shelf and ay of Fundy is provided. Survey trends for each stock from 97 to present are shown as a series of graphs and expanding symbol maps. This information is used in assessment meetings as a key source of information on trends for selected groundfish stocks. Résumé Un résumé des résultats du relevé au chalut de fond qui a été effectué pendant l'été de 24 par le Ministère des Pêches et des Océans dans les eaux du plateau néo-écossais et de la baie de Fundy est présenté. Les tendances pour chaque stock dans les relevés de 97 jusqu'à aujourd'hui sont présentées sous forme d'une série de graphiques et de cartes de distribution. Ces résultats sont utilisés lors de réunions d'évaluation comme principale source d'information sur les tendances des stocks de poisson de fond sélectionnés. i

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5 INTRODUCTION Introduction The annual groundfish bottom trawl survey was conducted by DFO on the Scotian Shelf and ay of Fundy as planned July to 3 July 24. The results of this survey were compiled for selected stocks to provide clients with a preliminary view of biomass, abundance, resource concentration, area occupied, size composition, and distribution as determined by the survey. The groundfish stocks covered by the report and the lead scientific investigator are listed in Table. The distribution of sampling effort compared with the past three years is shown in Figures to 4. Survey trends for each stock from 97 to present are shown in Figures to 2. Mean weight and number caught per tow and long term frequency distribution time series are not adjusted for the research vessel and survey gear changes which occurred in 982-3, and Fanning (98) reported vessel conversion factors from comparative fishing experiments, which are large for some species. The comparative fishing experiment has yet to be performed between the CCGS Needler used for the period , and the CCGS Teleost used in 24. s a result no calibration factor has been calculated, and the abundance estimates for the 23 and 24 surveys are not comparable. The 24 survey points are shown as separate symbols to highlight this issue in the time series graphs. ranton and lack (999, 2, 2, 22, 23) reported similar results for the surveys. The figures in the 23 ranton and lack document contain incorrectly calculated stratified mean weight and number per tow values (Fig., 9, 3, 7, 2, 2, 29, 33, 37, 4, 4, 49, 3, 7, 6, 6, 69, 73, 77, 8, 8, 89, 93, 97,,, and 9). The matching figures in this document provide the corrected time series graphs with the addition of the 24 survey point. This does not in our opinion alter interpretation of the plots. This document also includes the resource concentration, prevalence, and CPUE where present indicators which measure demersal fish population distribution (Halliday, 2). n estimate of resource prevalence is the proportion of sets containing the species of interest. This provides an indication of how widely the species is distributed within the survey area without reference to density. third distribution index, CPUE where present, is the average of the log (non-zero catches) and is indicative of the average local density. Comprehensive interpretations of stock status are contained in stock assessment documents prepared annually for many of the stocks described here ( Such reports contain information on commercial fishery catch rates and other survey results when available. Therefore, the abundance trends reported here, based on the survey information only, are not directly comparable to those provided in recent assessments.

6 Survey Description The 34th annual Scotian Shelf summer groundfish survey was conducted from the research vessel CCGS Teleost out of the edford Institute of Oceanography, Dartmouth, N.S., on two trips TEL2429 (-6 July 24) and TEL243 (8 July - 3 July 24). The survey was conducted using the standard protocol (Koeller, 98). Two hundred and thirty one fishing stations, from the Upper ay of Fundy to the northern tip of Cape reton and offshore to the 4 fathom contour, were completed. Samples were obtained with a Western II bottom trawl towed for 3 minutes at a speed of 3. knots. The trawl has a 6 foot roller-rigged footrope and 2 pound Portuguese doors. The codend is lined with 3/4 inch mesh to retain small fish. ll finfish and major invertebrate species caught were sampled for length and weight and some species were sampled additionally for otoliths to determine age, for evidence of sexual maturity and for stomach contents. Vertical profiles of temperature, salinity, nutrients and oxygen were observed at all fishing stations. References ranton, R. and J. lack Summer Groundfish Survey update for selected Scotia-Fundy groundfish stocks. CSS Res Doc. 99/. 6p. ranton, R. and G. lack Summer Groundfish Survey update for selected Scotia-Fundy groundfish stocks. CSS Res Doc. 2/29. 6p. ranton, R. and G. lack Summer Groundfish Survey update for selected Scotia-Fundy groundfish stocks. CSS Res Doc. 2/ p. ranton, R. and G. lack Summer Groundfish Survey update for selected Scotia-Fundy groundfish stocks. CSS Res Doc. 2/ p. ranton, R. and G. lack Summer Groundfish Survey update for selected Scotia-Fundy groundfish stocks. CSS Res Doc. 23/89. 6 p. Fanning, L.P. 98. Intercalibration of research vessel survey results obtained by different vessels. CFSC Res. Doc. 8/3: 43p. Halliday, R.G. 2. Proceedings of the Fisheries Management Studies Working Group (-6 and 3 May 2). CSS Proc. Ser. 2/2. 82p. Koeller, P. 98. Manual for groundfish survey personnel - cruise preparation, conduct and standing orders. DFO Marine Fish Division Laboratory Reference No. 8/3. 2

7 Table. Stock name, figure list, page list, as well as name, telephone number and address of the lead investigator for groundfish stocks observed on 23 summer bottom trawl survey. Stock Figures Pages Investigator Telephone 4Vn Cod* Showell (92) ShowellM@mar.dfompo.gc.ca 4VsW Cod* Mohn (92) MohnR@mar.dfo-mpo.gc.ca 4X Cod* Clark (6) ClarkD@mar.dfo-mpo.gc.ca 4VW Haddock* Mohn (92) MohnR@mar.dfo-mpo.gc.ca 4X Haddock* Hurley (92) HurleyP@mar.dfo-mpo.gc.ca 4VWX Pollock* Neilson (6) NeilsonJ@mar.dfo-mpo.gc.ca Unit 3 Redfish ranton (92) ranton@mar.dfompo.gc.ca 4VW Plaice* Fowler (92) FowlerM@mar.dfo-mpo.gc.ca 4VW Yellowtail* Fowler (92) FowlerM@mar.dfo-mpo.gc.ca 4VW Witch* Fowler (92) FowlerM@mar.dfo-mpo.gc.ca 4VW Winter Flounder Fowler (92) Fowler@mar.dfo-mpo.gc.ca 4X Plaice Fowler (92) Fowler@mar.dfo-mpo.gc.ca 4X Yellowtail Fowler (92) Fowler@mar.dfo-mpo.gc.ca 4X Witch McRuer (92) McruerJ@mar.dfo-mpo.gc.ca 4X Winter Flounder Fowler (92) FowlerM@mar.dfo-mpo.gc.ca 4VWX Halibut rmsworthy (92) rmsworthys@mar.dfompo.gc.ca 4VWX Silver Hake* 4VsW Winter Skate Showell (92) ShowellM@mar.dfompo.gc.ca Simon (92) SimonJ@mar.dfo-mpo.gc.ca 4VWX Monkfish Stobo (92) StoboW@mar.dfo-mpo.gc.ca 4VW White Hake undy (92) undy@mar.dfo-mpo.gc.ca 4X White Hake undy (92) undy@mar.dfo-mpo.gc.ca 4VWX Wolffish* McRuer (92) McruerJ@mar.dfo-mpo.gc.ca 3

8 Stock Figures Pages Investigator Telephone 4VWX Cusk Harris (92) VW Lumpfish Wilson (92) X Lumpfish Wilson (92) VW Turbot Stobo (92) VWX Spiny Campana (92) Dogfish * was assessed in 24. Stock Status reports are available at 4

9 47 3Pn 4Vn X 4W 4Vs Fig.. SUMMER Groundfish Survey Positions Fig. 2. SUMMER Groundfish Survey Positions 22

10 Fig. 3. SUMMER Groundfish Survey Positions Fig. 4. SUMMER Groundfish Survey Positions 24 6

11 3 2 () Catch per Tow (Kg) () Catch per Tow (No) 2 () Resource Concentration (%) () Prevalence (%) (C) CPUE where present year moving avg Year Fig.. 4Vn Cod stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series. 2 C 4 2 Total Numbers at length (thousands) Length (cm) Fig. 6. 4Vn Cod length frequency distribution from the SUMMER Groundfish surveys. 7

12 2: 6 sets, max = : 7 sets, max = : sets, max = Fig. 7. 4Vn Cod iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 6 sets, max = Fig. 8. 4Vn Cod iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 8

13 () Catch per Tow (Kg) () Catch per Tow (No) 7 () Resource Concentration (%) () Prevalence (%) (C) CPUE where present year moving avg Year Fig. 9. 4VsW Cod stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series. C 7 2 Total Numbers at length (thousands) Length (cm) Fig.. 4VsW Cod length frequency distribution from the SUMMER Groundfish surveys. 9

14 2: sets, max = 2 23: sets, max = : 6 sets, max = Fig.. 4VsW Cod iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 9 sets, max = Fig. 2. 4VsW Cod iomass (kg/tow) from the 24 SUMMER Groundfish Survey.

15 4 () Catch per Tow (Kg) () Catch per Tow (No) 2 2 () Resource Concentration (%) () Prevalence (%) (C) CPUE where present year moving avg Year Fig. 3. 4X Cod stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series. 6. C 2 2 Total Numbers at length (thousands) Length (cm) Fig. 4. 4X Cod length frequency distribution from the SUMMER Groundfish surveys.

16 2: 7 sets, max = 8 23: 84 sets, max = : 77 sets, max = Fig.. 4X Cod iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 63 sets, max = Fig. 6. 4X Cod iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 2

17 () Catch per Tow (Kg) () Catch per Tow (No) () Resource Concentration (%) () Prevalence (%) (C) CPUE where present year moving avg Year Fig. 7. 4VW Haddock stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series. 3 2 C 7 2 Total Numbers at length (thousands) Length (cm) Fig. 8. 4VW Haddock length frequency distribution from the SUMMER Groundfish surveys. 3

18 2: 3 sets, max = : 32 sets, max = : 3 sets, max = Fig. 9. 4VW Haddock iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 2 sets, max = Fig. 2. 4VW Haddock iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 4

19 () Catch per Tow (Kg) () Catch per Tow (No) 6 () Resource Concentration (%) () Prevalence (%) (C) CPUE where present year moving avg Year Fig. 2. 4X Haddock stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series. 7 3 C Total Numbers at length (thousands) Length (cm) Fig X Haddock length frequency distribution from the SUMMER Groundfish surveys.

20 2: 7 sets, max = 76 23: 84 sets, max = : 77 sets, max = Fig X Haddock iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 63 sets, max = Fig X Haddock iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 6

21 () Catch per Tow (Kg) 2 () Catch per Tow (No) () Resource Concentration (%) () Prevalence (%) (C) CPUE where present year moving avg Year Fig. 2. 4VWX Pollock stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series. 2 C 7 2 Total Numbers at length (thousands) Length (cm) Fig VWX Pollock length frequency distribution from the SUMMER Groundfish surveys. 7

22 2: 2 sets, max = : 26 sets, max = : 28 sets, max = Fig VWX Pollock iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 88 sets, max = Fig VWX Pollock iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 8

23 8 () Catch per Tow (Kg) 4 () Catch per Tow (No) 2 6 () Resource Concentration (%) () Prevalence (%) (C) CPUE where present 3 3 year moving avg Year Fig. 29. Unit3 Redfish Unseparated stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series. 4 2 C Total Numbers at length (thousands) Length (cm) Fig. 3. Unit3 Redfish Unseparated length frequency distribution from the SUMMER Groundfish surveys. 9

24 2: 22 sets, max = : 36 sets, max = : 3 sets, max = Fig. 3. Unit3 Redfish Unseparated iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 3 sets, max = Fig. 32. Unit3 Redfish Unseparated iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 2

25 2 () Catch per Tow (Kg) () Catch per Tow (No) 8 4 () Resource Concentration (%) () Prevalence (%) (C) CPUE where present year moving avg Year Fig VW merican Plaice stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series C 7 2 Total Numbers at length (thousands) Length (cm) Fig VW merican Plaice length frequency distribution from the SUMMER Groundfish surveys. 2

26 2: 3 sets, max = 7 23: 32 sets, max = : 3 sets, max = Fig. 3. 4VW merican Plaice iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 2 sets, max = Fig VW merican Plaice iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 22

27 2 () Catch per Tow (Kg) () Catch per Tow (No) 8 4 () Resource Concentration (%) year moving avg. () Prevalence (%) (C) CPUE where present Year Fig VW Yellowtail Flounder stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series C 7 2 Total Numbers at length (thousands) Length (cm) Fig VW Yellowtail Flounder length frequency distribution from the SUMMER Groundfish surveys. 23

28 2: 3 sets, max = 28 23: 32 sets, max = : 3 sets, max = Fig VW Yellowtail Flounder iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 2 sets, max = Fig. 4. 4VW Yellowtail Flounder iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 24

29 8 () Catch per Tow (Kg) () Catch per Tow (No) 2 4 () Resource Concentration (%) () Prevalence (%) (C) CPUE where present year moving avg Year Fig. 4. 4VW Witch Flounder stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series. 4 C 2 2 Total Numbers at length (thousands) Length (cm) Fig VW Witch Flounder length frequency distribution from the SUMMER Groundfish surveys. 2

30 2: 3 sets, max = 86 23: 32 sets, max = : 3 sets, max = Fig VW Witch Flounder iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 2 sets, max = Fig VW Witch Flounder iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 26

31 2 () Catch per Tow (Kg) () Catch per Tow (No) () Resource Concentration (%) () Prevalence (%) (C) CPUE where present year moving avg Year Fig. 4. 4VW Winter Flounder stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series. C 4 2 Total Numbers at length (thousands) Length (cm) Fig VW Winter Flounder length frequency distribution from the SUMMER Groundfish surveys. 27

32 2: 3 sets, max = 7 22: 3 sets, max = : 32 sets, max = Fig VW Winter Flounder iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 2 sets, max = Fig VW Winter Flounder iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 28

33 4 () Catch per Tow (Kg) () Catch per Tow (No) () Resource Concentration (%) () Prevalence (%) (C) CPUE where present year moving avg Year Fig X merican Plaice stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series. 4 C 7 2 Total Numbers at length (thousands) Length (cm) Fig.. 4X merican Plaice length frequency distribution from the SUMMER Groundfish surveys. 29

34 2: 7 sets, max = 7 22: 77 sets, max = : 84 sets, max = Fig.. 4X merican Plaice iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 63 sets, max = Fig. 2. 4X merican Plaice iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 3

35 . () Catch per Tow (Kg).7 () Catch per Tow (No) year moving avg. () Resource Concentration (%) () Prevalence (%) (C) CPUE where present Year Fig. 3. 4X Yellowtail Flounder stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series C Total Numbers at length (thousands) Length (cm) Fig. 4. 4X Yellowtail Flounder length frequency distribution from the SUMMER Groundfish surveys. 3

36 2: 7 sets, max = 6 23: 84 sets, max = : 77 sets, max = Fig.. 4X Yellowtail Flounder iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 63 sets, max = Fig. 6. 4X Yellowtail Flounder iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 32

37 () Catch per Tow (Kg) () Catch per Tow (No) year moving avg. () Resource Concentration (%) () Prevalence (%) (C) CPUE where present Year Fig. 7. 4X Witch Flounder stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series C Total Numbers at length (thousands) Length (cm) Fig. 8. 4X Witch Flounder length frequency distribution from the SUMMER Groundfish surveys. 33

38 2: 7 sets, max = 38 22: 77 sets, max = : 84 sets, max = Fig. 9. 4X Witch Flounder iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 63 sets, max = Fig. 6. 4X Witch Flounder iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 34

39 () Catch per Tow (Kg) () Catch per Tow (No) 2. () Resource Concentration (%) () Prevalence (%) (C) CPUE where present year moving avg Year Fig. 6. 4X Winter Flounder stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series. 2 2 C Total Numbers at length (thousands) Length (cm) Fig X Winter Flounder length frequency distribution from the SUMMER Groundfish surveys. 3

40 2: 7 sets, max = 78 23: 84 sets, max = : 77 sets, max = Fig X Winter Flounder iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 63 sets, max = Fig X Winter Flounder iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 36

41 () Catch per Tow (Kg) () Catch per Tow (No) year moving avg. () Resource Concentration (%) () Prevalence (%) (C) CPUE where present Year Fig. 6. 4VWX Halibut stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series C Total Numbers at length (thousands) Length (cm) Fig VWX Halibut length frequency distribution from the SUMMER Groundfish surveys. 37

42 2: 2 sets, max = 2 22: 28 sets, max = : 26 sets, max = Fig VWX Halibut iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 88 sets, max = Fig VWX Halibut iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 38

43 3 () Catch per Tow (Kg) () Catch per Tow (No) () Resource Concentration (%) () Prevalence (%) (C) CPUE where present year moving avg Year Fig VWX-484/49 Silver Hake stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series C 7 2 Total Numbers at length (thousands) Length (cm) Fig. 7. 4VWX-484/49 Silver Hake length frequency distribution from the SUMMER Groundfish surveys. 39

44 2: 78 sets, max = 29 23: 79 sets, max = : 8 sets, max = Fig. 7. 4VWX-484/49 Silver Hake iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 67 sets, max = Fig VWX-484/49 Silver Hake iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 4

45 6 () Catch per Tow (Kg) 3 () Catch per Tow (No) year moving avg. () Resource Concentration (%) () Prevalence (%) (C) CPUE where present Year Fig VsW Winter Skate stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series C 2 2 Total Numbers at length (thousands) Length (cm) Fig VsW Winter Skate length frequency distribution from the SUMMER Groundfish surveys. 4

46 2: sets, max = 23: sets, max = : 6 sets, max = Fig. 7. 4VsW Winter Skate iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 9 sets, max = Fig VsW Winter Skate iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 42

47 () Catch per Tow (Kg) () Catch per Tow (No) () Resource Concentration (%) 4 3 year moving avg. () Prevalence (%) (C) CPUE where present Year Fig VWX Monkfish stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series C 4 2 Total Numbers at length (thousands) Length (cm) Fig VWX Monkfish length frequency distribution from the SUMMER Groundfish surveys. 43

48 2: 2 sets, max = 3 22: 28 sets, max = : 26 sets, max = Fig VWX Monkfish iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 88 sets, max = Fig. 8. 4VWX Monkfish iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 44

49 () Catch per Tow (Kg) () Catch per Tow (No) year moving avg. () Resource Concentration (%) () Prevalence (%) (C) CPUE where present Year Fig. 8. 4VW White Hake stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series C 4 2 Total Numbers at length (thousands) Length (cm) Fig VW White Hake length frequency distribution from the SUMMER Groundfish surveys. 4

50 2: 3 sets, max = 2 23: 32 sets, max = : 3 sets, max = Fig VW White Hake iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 2 sets, max = Fig VW White Hake iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 46

51 3 () Catch per Tow (Kg) () Catch per Tow (No) () Resource Concentration (%) () Prevalence (%) (C) CPUE where present year moving avg Year Fig. 8. 4X White Hake stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series. 4. C 4 2 Total Numbers at length (thousands) Length (cm) Fig X White Hake length frequency distribution from the SUMMER Groundfish surveys. 47

52 2: 7 sets, max = 29 23: 84 sets, max = : 77 sets, max = Fig X White Hake iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 63 sets, max = Fig X White Hake iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 48

53 3 () Catch per Tow (Kg) 2 () Catch per Tow (No)..7 () Resource Concentration (%) () Prevalence (%) (C) CPUE where present year moving avg Year Fig VWX Striped tlantic Wolffish stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series. C Total Numbers at length (thousands) Length (cm) Fig. 9. 4VWX Striped tlantic Wolffish length frequency 49 distribution from the SUMMER Groundfish surveys.

54 2: 2 sets, max = 78 23: 26 sets, max = : 28 sets, max = Fig. 9. 4VWX Striped tlantic Wolffish iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 88 sets, max = Fig VWX Striped tlantic Wolffish iomass (kg/tow) from the 24 SUMMER Groundfish Survey.

55 3 () Catch per Tow (Kg) 2 () Catch per Tow (No). 4 () Resource Concentration (%) () Prevalence (%) (C) CPUE where present year moving avg Year Fig VWX Cusk stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series..4 C Total Numbers at length (thousands) Length (cm) Fig VWX Cusk length frequency distribution from the SUMMER Groundfish surveys.

56 2: 2 sets, max = 22: 28 sets, max = : 26 sets, max = Fig. 9. 4VWX Cusk iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 88 sets, max = Fig VWX Cusk iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 2

57 .6 () Catch per Tow (Kg) () Catch per Tow (No) () Resource Concentration (%) 3 3 year moving avg. () Prevalence (%) (C) CPUE where present Year Fig VW Lumpfish stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series C 2 2 Total Numbers at length (thousands) Length (cm) Fig VW Lumpfish length frequency distribution from the SUMMER Groundfish surveys. 3

58 2: 3 sets, max =. 22: 3 sets, max = : 32 sets, max = Fig VW Lumpfish iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 2 sets, max = Fig.. 4VW Lumpfish iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 4

59 .4 () Catch per Tow (Kg).2 () Catch per Tow (No) year moving avg. () Resource Concentration (%) () Prevalence (%) (C) CPUE where present Year Fig.. 4X Lumpfish stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series C Total Numbers at length (thousands) Length (cm) Fig. 2. 4X Lumpfish length frequency distribution from the SUMMER Groundfish surveys.

60 2: 7 sets, max = 22: 77 sets, max = : 84 sets, max = Fig. 3. 4X Lumpfish iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 63 sets, max = Fig. 4. 4X Lumpfish iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 6

61 3 () Catch per Tow (Kg) 2 () Catch per Tow (No) () Resource Concentration (%) () Prevalence (%) (C) CPUE where present year moving avg Year Fig.. 4VW Turbot stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series. C Total Numbers at length (thousands) Length (cm) Fig. 6. 4VW Turbot length frequency distribution from the SUMMER Groundfish surveys. 7

62 2: 3 sets, max = 8 23: 32 sets, max = : 3 sets, max = Fig. 7. 4VW Turbot iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 2 sets, max = Fig. 8. 4VW Turbot iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 8

63 () Catch per Tow (Kg) () Catch per Tow (No) year moving avg. () Resource Concentration (%) () Prevalence (%) (C) CPUE where present Year Fig. 9. 4VWX Spiny Dogfish stratified mean weight caught per tow, stratified mean number caught per tow, resource concentration, prevalence, CPUE where present (log number/tow) from the SUMMER Groundfish surveys. The catch for 24 was sampled using the MV Teleost. It has not been calibrated, and should not be compared to the earlier time series C Total Numbers at length (thousands) Length (cm) Fig.. 4VWX Spiny Dogfish length frequency distribution from the SUMMER Groundfish surveys. 9

64 2: 2 sets, max = 24 23: 26 sets, max = : 28 sets, max = Fig.. 4VWX Spiny Dogfish iomass (kg/tow) from the 2-23 SUMMER Groundfish Surveys : 88 sets, max = Fig. 2. 4VWX Spiny Dogfish iomass (kg/tow) from the 24 SUMMER Groundfish Survey. 6