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Metadata: 1000S HERAS - Herring acoustic survey - North sea - Scotia cruise 1000S
Abstract:
Daily folders (22) of Simrad format (.ek5 format) . 22 Echoview format (EV) format analysis files. Excel biological data for 44 pelagic hauls. Continual AGDS data1. Objectives: To participate in an ICES co-ordinated acoustic and midwater trawling survey in the north western North Sea and north of Scotland between 58° to 61°30’N and 4°W to 2°E, excluding Norwegian and Faroese waters. 2. To obtain samples of herring for biological analysis, including age, length, weight, sex, maturity and ichthyophonous infection. 3. To obtain hydrographic data for comparison with the horizontal and vertical distribution of herring 4. To carry out an acoustic inter-calibration with the Norwegian research vessel GO Sars. .
Data holder:
Scottish Government (Marine Scotland)
Use constraints:
no limitations to public access
Other details | ||
Internal code | Internally assigned metadata identifier | 6220 |
Title | The title is used to provide a brief and precise description of the dataset such as 'Date', 'Originating organisation/programme', 'Location' and 'Type of survey'. All acronyms and abbreviations should be reproduced in full. | 1000S HERAS - Herring acoustic survey - North sea - Scotia cruise 1000S |
Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | Herring, Acoustic survey, North sea, HERAS |
File Identifier | The File Identifier is a code, preferably a GUID, that is globally unique and remains with the same metadata record even if the record is edited or transferred between portals or tools. | Marine_Scotland_FishDAC_1735 |
Resource Identifier | This is the code assigned by the data owner. | Marine_Scotland_FishDAC_1735 |
Resource type | The resource type will likely be a dataset but could also be a series (collection of datasets with a common specification) or a service. | dataset |
Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 2000-06-05 |
End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2000-06-26 |
Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | 55000.00 |
Spatial resolution unit | This describes the unit of spatial resolution which for distance must be metres. | http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/uom/gmxUom.xml#m |
Frequency of updates | This describes the frequency with which the resource is modified or updated i.e. a monitoring programme that samples once per year has a frequency that is described as 'annually'. | Not Planned |
Abstract | The abstract provides a clear and brief statement of the content of the resource. | Daily folders (22) of Simrad format (.ek5 format) . 22 Echoview format (EV) format analysis files. Excel biological data for 44 pelagic hauls. Continual AGDS data1. Objectives: To participate in an ICES co-ordinated acoustic and midwater trawling survey in the north western North Sea and north of Scotland between 58° to 61°30’N and 4°W to 2°E, excluding Norwegian and Faroese waters. 2. To obtain samples of herring for biological analysis, including age, length, weight, sex, maturity and ichthyophonous infection. 3. To obtain hydrographic data for comparison with the horizontal and vertical distribution of herring 4. To carry out an acoustic inter-calibration with the Norwegian research vessel GO Sars. . |
Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Installation and testing of the equipment was carried out from 3-4 July inclusive whilst the vessel was alongside Aberdeen harbour. FRV Scotia departed Aberdeen at 0800 GMT on Wednesday 5 July. The vessel then proceeded to Scapa Flow. The pelagic net was deployed en-route to familiarise some new members of the crew with trawling procedures. The vessel arrived in Scapa Flow at 2245 GMT. Calibration of the 38 and 120 kHz EK500 transducers then took place on Wednesday evening continuing into Thursday morning. Following calibration the vessel proceeded to the start point of the survey arriving at 1000 GMT on Thursday morning. The survey then proceeded northwards as planned, running transects along lines of latitude. Poor weather was experienced on 10 and 11 July which slowed progress but did not prevent the collection of good quality acoustic data. The vessel docked into Lerwick harbour late morning on Saturday 15 July for a half landing and exchange of personnel. F Gerlotto, E Josse, K Gunstone and C de Freitas departed at this point and E Jones joined the vessel. A meeting with scientific staff of the Norwegian research vessel GO Sars was conducted on Saturday afternoon to co-ordinate the inter-calibration exercise. The vessel left Lerwick on Sunday 16 July at 0830 GMT. An intercalibration exercise was then conducted with the GO Sars on the first transect out of Lerwick. This was completed at 1600 GMT, whereupon both vessels continued with their respective surveys. The survey continued northwards as far as 61°30’N along the eastern side of the Shetland Islands, and then progressed southwards along the western side. The survey was completed on Tuesday 25 July at 1215 GMT. The vessel then proceeded to Scapa Flow to conduct a calibration of the 38 kHz EK500 transducer on Tuesday afternoon. This exercise was complete by 1900 GMT. The vessel then met up with the MFV Christina S. to conduct another intercalibration exercise whilst on passage to Aberdeen. Results 1. The survey was completed on schedule with all transects sampled as planned giving a total of 1190 acoustic sampling units (2975 n.mi.). Over 7 GB of Acoustic data were collected at four frequencies (18, 38, 120 and 200 kHz) stored to PC and CD. The 38 & 120 kHz transducers were successfully calibrated at the start of the survey. The primary frequency (38 kHz) was successfully calibrated once again at the end; performance deviation was less than 0.05 dB (consistent to within 2 %). 2. Trawling operations were very successful, particularly with regard to the deployment and recovery of the netsonde cable which was not damaged on any occasion. A total of 45 trawl hauls were carried out: 43 with the pelagic trawl (PT160) and 2 with the demersal trawl (BT101m). Herring were caught in 37 hauls and in significant quantities (>100 individuals) in 33 hauls. A total of 10,329 fish were measured for length and over 3400 of these were sampled for weight, sex, maturity, and otoliths (for age). Herring were examined for evidence of ichthyophonous infection; provisional estimates suggest that the overall level of infection is less than 5 %. 3. Young herring (length < 21 cm) were detected in large quantities north of the Moray Firth in the southern portion of the surveyed area. Concentrations of larger herring were detected further offshore in the southern portion of the survey, in the central portion around the 110 miles holes area, off the north western coast of Shetland, and off the east coast of Shetland. A significant number and size of pelagic traces attributed to haddock were detected. A full stock estimate for herring and survey report will be prepared shortly. 4. A total of 47 CTD casts and reversing water bottle samples were taken to map the hydrography of the region and for calibration of the CTD probe: where possible, at least one cast was taken in each ICES statistical rectangle sampled. The ships thermosalinograph was operated continuously throughout the cruise giving sea surface temperature and salinity readings. 5. Intercalibration exercises were successfully carried out with the Norwegian RV GO Sars and the Scottish MFV Christina S. These data will be analysed at the ICES Planning Group for Herring Surveys meeting later in the year. |
Related keywords | ||
Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Marine Environmental Data and Information Network |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Physical oceanography | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Acoustics | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Biota composition | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Fish | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Water column temperature and salinity | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Acoustic backscatter in the water column | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Fish abundance in water bodies | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Fish biomass in water bodies | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Fish morphology, age and physiology | |
Geographical coverage | ||
North | The northern-most limit of the data resource in decimal degrees | 62 |
East | The eastern-most limit of the data resource in decimal degrees | 2 |
South | The southern-most limit of the data resource in decimal degrees | 58.5 |
West | The western-most limit of the data resource in decimal degrees | -4 |
Regional sea | 46E6 | |
47E6 | ||
48E6 | ||
49E6 | ||
46E7 | ||
47E7 | ||
48E7 | ||
49E7 | ||
50E7 | ||
46E8 | ||
47E8 | ||
48E8 | ||
49E8 | ||
50E8 | ||
51E8 | ||
46E9 | ||
47E9 | ||
48E9 | ||
49E9 | ||
50E9 | ||
51E9 | ||
52E9 | ||
46F0 | ||
47F0 | ||
48F0 | ||
49F0 | ||
50F0 | ||
51F0 | ||
52F0 | ||
46F1 | ||
47F1 | ||
48F1 | ||
49F1 | ||
50F1 | ||
51F1 | ||
52F1 | ||
Responsible organisations | ||
Role | The point of contact is person or organisation with responsibility for the creation and maintenance of the metadata for the resource. | pointOfContact |
Organisation name | Scottish Government (Marine Scotland) | |
Phone | +44 (0)300 244 4000 | |
Role | The point of contact is person or organisation with responsibility for the creation and maintenance of the metadata for the resource. | pointOfContact |
Organisation name | Scottish Government (Marine Scotland) | |
Phone | +44 (0)300 244 4000 | |
Delivery point | Mailpoint 11, Area 1B South, Victoria Quay | |
Postal code | EH6 6QQ | |
City | Edinburgh | |
Country | United Kingdom | |
Role | The custodian is the person or organisation that accepts responsibility for the resource and ensures appropriate care and maintenance. If a dataset has been lodged with a Data Archive Centre for maintenance then this organisation is be entered here. | custodian |
Organisation name | Scottish Government (Marine Scotland) | |
Phone | +44 (0)300 244 4000 | |
Delivery point | Mailpoint 11, Area 1B South, Victoria Quay | |
Postal code | EH6 6QQ | |
City | Edinburgh | |
Country | United Kingdom | |
Role | The distributor is the person or organisation that distributes the resource. | distributor |
Organisation name | Scottish Government (Marine Scotland) | |
Phone | +44 (0)300 244 4000 | |
Delivery point | Mailpoint 11, Area 1B South, Victoria Quay | |
Postal code | EH6 6QQ | |
City | Edinburgh | |
Country | United Kingdom | |
Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
Organisation name | Aberdeen University | |
Phone | +44 1224 272 000 | |
Delivery point | King's College | |
Postal code | AB24 3FX | |
City | Aberdeen | |
Country | United Kingdom | |
Resource locators | ||
Locator URL | Web address (URL) that links to the resource | https://www.bodc.ac.uk/data/information_and_inventories/cruise_inventory/search/ |
Locator function | Code that describes the function of the resource. ISO function code chosen from ISO 19115-1 Codelist | Reference info #0 |
Dataset constraints | ||
20 Limitations on Public Access - Access constraints | otherRestrictions | |
20 Limitations on Public Access - Other constraints | This states any limitations on access to the data and uses free text. | no limitations to public access |
21 Conditions for Access and Use - Use limitation | This states any constraints on use of the data. Multiple conditions can be recorded for different parts of the data resource. If no conditions apply, then `No condtions apply` is recorded. This uses free text. | Open Government License (http://www.nationalarchives.gov.uk/doc/open-government-licence/) |
Version info | ||
Date of publication | The publication date of the resource or if previously unpublished the date that the resource was made publicly available via the MEDIN network. | 2016-05-04 |
Harvest date | The date which this record has been (re)harvested from the provider. | 2024-04-21 |
Metadata date | The date when the content of this metadata record was last updated. | 2016-05-04 |
Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN Discovery Metadata |
Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | Version 2.3.7 |