BB19 - Mean maximum length of demersal fish and elasmobranchs (FC3)
| Field | Description | Validated Entry |
|---|---|---|
| [Table title] | Name of monitoring programme | Mean maximum length of demersal fish and elasmobranchs (FC3) |
| [ProgrammeDescription] | Description of the monitoring programme | The most important data source for mean maximum length are those fisheries surveys (groundfish and beam trawl) that are conducted as part of ICES. The International Bottom Trawl Survey (IBTS) programme in the North Sea, the Celtic Seas, Bay of Biscay and Iberia is particularly important since the trawl is a general-purpose design aimed to catch both demersal and pelagic species. Standard data collected on these surveys consists of numbers of each species of fish sampled in each trawl sample, measured to defined length categories (i.e. 1cm below, so a fish with a recorded length of 14 cm would be between 14.00 cm and 14.99 cm in length). By dividing these species catch numbers-at-length by the area swept by the trawl on each sampling occasion, these catch data are converted to standardised estimates of fish density-at-length (referred to below as Catch Per Unit Area, CPUA), by species, at each sampling location. |
| [OtherPoliciesConventions] | Monitoring for other Union legislation or international agreements that contributes to the programme. | OSP-CEMP |
| [Contracting Parties monitoring] | Which other countries are involved in practical implementation of this monitoring programme, and what is the degree of cooperation. | Joint data collection (multinational delivery using same platform) DE, DK, ES, FR, IE, NL, NO, PT, SE, UK |
| [Contracting Parties supplying data] | DE, DK, ES, FR, IE, NL, NO, PT, SE, UK | |
| [Contracting Parties with an "opt out"] | ||
| [Temporal scope] | Start (and end) date of the programme. | 1983 - 9999 |
| [Spatial scope] | Spatial coverage of the programme according to the jurisdictional zones of marine waters. | EEZ (or similar, e.g. Contiguous Zone, Fishing Zone, Ecological Protection Zone) |
| [Aggregation of Data] | At which scale can the data from the sub-programme be aggregated for environmental assessments? | Regional (Greater North Sea); Subregion (Celtic Seas, Bay of Biscay) |
| [MarineReportingUnit] | Area(s) where the programme takes place. | marineSubregion marineSubdivision |
[Monitoring Purpose] | Purpose of the programme aimed at collecting data and information. | Environmental state and impacts |
| [MonitoringType] | Type of monitoring (in-situ, remote sensing, etc.). | In-situ sampling offshore In-situ sampling coastal |
| [Indicator Metric] | Feature(s) monitored (ecosystem components, pressures, activities). | FishAll |
| [Elements] | Element(s) monitored (e.g. species, habitats, contaminants). | Acipenser sturio Amblyraja radiata Anarhichas lupus Anguilla anguilla Argentina silus Argentina sphyraena Argentina spp. Arnoglossus imperialis Arnoglossus laterna Arnoglossus rueppelli Arnoglossus thori Aspitrigla cuculus Blennius ocellaris Brosme brosme Buglossidium luteum Callionymus lyra Callionymus maculatus Centrophorus granulosus Cepola macrophthalma Chelidonichthys obscurus Chimaera monstrosa Chlorophthalmus agassizi Citharus linguatula Coelorinchus caelorhincus Conger conger Coryphaenoides rupestris Dasyatis pastinaca Deltentosteus quadrimaculatus Dicentrarchus labrax Dilodus bellotii Dipturus batis Dipturus oxyrinchus Echiichthys vipera Enchelyopus cimbrius Etmopterus spinax Eutrigla gurnardus Gadiculus argenteus Gadus morhua Gaidropsarus macrophthalmus Gaidropsarus vulgaris Galeorhinus galeus Galeus melastomus Glossanodon leioglossus Glyptocephalus cynoglossus Gnathophis mystax Helicolenus dactylopterus Heptranchias perlo Hippoglossus hippoglossus Hoplostethus mediterraneus Labrus mixtus Lepidotrigla cavillone Lesueurigobius friesii Lesueurigobius sanzi Leucoraja circularis Leucoraja melitensis Limanda limanda Liparis liparis Lophius budegassa Lophius piscatorius Lumpenus lampretaeformis Macroramphosus scolopax Melanogrammus aeglefinus Merlangius merlangus Merluccius merluccius Microchirus azevia Microchirus boscanion Microchirus ocellatus Microchirus variegatus Micromesistius poutassou Microstomus kitt Molva dypterygia Molva macrophthalma Molva molva Mullus barbatus barbatus Mullus surmuletus Muraena helena Mustelus asterias Mustelus mustelus Myliobatis aquila Myoxocephalus quadricornis Myoxocephalus scorpius Nezumia aequalis Oxynotus centrina Pagellus bellotii Pagrus pagrus Perca fluviatilis Peristedion cataphractum Petromyzon marinus Phycis blennoides Platichthys flesus Pleuronectes platessa Pollachius pollachius Pollachius virens Raja clavata Raja montagui Raja polystigma Scophthalmus maximus Scophthalmus rhombus Scorpaena loppei Scorpaena notata Scyliorhinus canicula Serranus hepatus Spicara flexuosa Spondyliosoma cantharus Squalus acanthias Squalus blainville Squatina squatina Symphurus nigrescens Syngnathus typhle Taurulus bubalis Torpedo marmorata Trachinus draco Trachurus trachurus Trigla lyra Trisopterus luscus Zeus faber Zoarces viviparus Hexanchus griseus Myliobatis aquila Nezumia sclerorhynchus Hymenocephalus italicus Boops boops Chelidonichthys lucerna Chelidonichthys cuculus Chelidonichthys lastoviza Lophius Pagellus bogaraveo Solea solea (sin. vulgaris) Mustelus punctulatus Raja asterias Lepidotrigla spp. Trachurus picturatus Microchirus variegatus |
| [Element Monitored] | Species composition of the fish and elasmobranch community | |
| [Parameter Measured] | Parameter(s) monitored. | BIOM SIZE-D |
| [Monitoring Guidelines/Monitoring Method in place] | Guidelines/protocols describing the method for monitoring. | CFP-004 CFP-007 |
| [MonitoringMethodOther] | Guidelines/protocols describing the method for monitoring. | |
| [Quality Assurance Procedures in Place] | In addition to a specified method, is there any additional Quality Assurance used? | ICESDataTypeGuide, National, Other |
| [Quality Control] | What type of Quality Control is used? | Real&DelayedValidation, Other QC DATRAS has an integrated quality check utility. All data, before entering the database, have to pass an extensive quality check. Additional data scrutiny (DATRAS data downloaded on 30-03-2017) is made by OSPAR experts prior to finalisation of a dataproduct for use in indicator assessments (Moriarty and Greenstreet, 2017). The final processed dataproduct is publically available. |
| [Data submission Frequency (and deadline)] | Frequency of the monitoring | 3-monthly |
| [Applicable MSFD GES Criteria] | Indicator(s) to which the programme contributes. | D4C1 |
| [Data Depository] | Link to where monitoring data can be accessed (Art. 19(3) | http://www.ices.dk/marine-data/data-portals/Pages/DATRAS.aspx |
| [Data Custodian] | National data are held by ICES Data Centre | |
| [Assessment Guidelines] | https://www.ospar.org/documents?v=38999 | |
| [Assessment tools available] | ||
| [Nature of data] | Product |