Scottish Marine and Freshwater Science Vol 8 No 14
This report presents the results of Scottish regional brown crab (Cancer pagurus), velvet crab (Necora puber) and lobster (Homarus gammarus) stock assessments carried out by Marine Scotland Science (MSS) based on length cohort analyses (LCAs) applied to commercial length frequency data for the period 2013-15. Associated data are presented for download.
Data and Resources
- Scottish Marine and Freshwater Science Vo 8 No 14pdf
PDF of the report
- Scottish crab and lobster landings 1974-2015 by assessment areacsv
Data for Figures 3-5. Landings by area for Brown crab (1974-2015), Velvet...
- Scottish crab and lobster fishery statistics 1974-2015csv
Data for Figure 2 in report. Landings of Brown crab, velvet crab, and...
- Crab and lobster size based indicatorscsv
Data for tables 14-16 in report. Data for Brown Crabs, Velvet crabs and...
- Fishing mortality from length cohort analysiscsv
Data for tables 11-13 in report. Fishing mortality (Fbar) for 2013-2015 in...
- Biological parameters used in stock assessment for brown crab, velvet crab and lobstercsv
Data for Table 6 in report. The values presented are for species, sex (M=...
- Market sampling statistics 2013-2015 for brown crab, velvet crab and lobstercsv
Data for Tables 3-5 and 8-10. Columns in this database are: Species: The...
- Minimum landing size regulations in Scotland for commercially important crab and lobster speciescsv
Data for Table 2 in report. Minimum landing size (MLS) regulations in...
- Crab and lobster species landed into Scotland by UK vessels 2009-2015csv
Crab and lobster species landed into Scotland by UK vessels 2009-2015
|Release Date|| |
|Spatial / Geographical Coverage Location|| |
|Temporal Coverage|| |
2013-01-01 to 2015-12-31
UK Open Government Licence (OGL)
|Data Dictionary|| |
With the exception of Shetland, limited effort data (pots fished) has been collected from creel fisheries although recent changes in the FISH1 form may improve data availability for vessels under 10 m. For larger offshore vessels, VMS data integrated with logbook landings could potentially be used to obtain indicators of landings-per-unit-effort and provide information on stock dynamics. • Discards in crab and lobster fisheries are sampled only on an irregular basis. More regular sampling and information on catches of undersized animals could provide an indication of inter-annual variation in recruitment. • The population structure and some aspects of the biology of crab and lobster are not well understood and some of the assessment areas as currently defined may be inappropriate. Brown crab tagging studies are currently underway in Orkney and these may shed light on potential links between the offshore stock at Sule and inshore Orkney stock. • Given the sensitivity of LCAs to the input growth parameters, further work in this area is required. Field studies based on tagging methods and subsequent evaluation of parameters would be desirable. • Information on factors affecting catchability such as bait type, creel density and soak time could be collected by engaging with fishers and industry. Work being conducted within the SIFIDS projects may provide an improved understanding of the drivers of fishing behaviour.
|Contact Name|| |
Marine Scotland Science
|Public Access Level|| |