© OpenStreetMap contributors
Daily folders (17) of Simrad format (.raw) acoustic data. 17 Echoview format (EV) format analysis files. FSS format biological data for 33 pelagic hauls. CTD data for 32 vertical dips. Continual Thermosalinograph data. Continual AGDS data. continual hydrophone recordings for Cetaceans. Objectives:To conduct an acoustic survey to estimate the abundance and distribution of herring in the north western North Sea and north of Scotland between 58º30’-62ºN and from 4ºW to 2ºE.To obtain biological samples for echosounder trace identification using a pelagic trawl.To test feasibility of using GoPro cameras mounted in the net and on a dropframe to further aid in species identification in the echogram scrutiny process.To obtain samples of herring for biological analysis, including age, length, weight, sex, maturity and ichthyophonus infection.To obtain hydrographic data for comparison with the horizontal and vertical distribution of herring. To obtain acoustic recordings of cetaceans during the survey using a towed hydrophone system.
Scottish Government (Marine Scotland)
no limitations to public access
Other details | ||
Internal code | Internally assigned metadata identifier | 6161 |
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. | HERAS - 0815S - Herring acoustic survey 2015 - North Sea and west of Scotland - Scotia |
Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | HERAS, Herring Acoustic Survey |
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_1711 |
Resource Identifier | This is the code assigned by the data owner. | Marine_Scotland_FishDAC_1711 |
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 | 2015-06-25 |
End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2016-07-14 |
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 (17) of Simrad format (.raw) acoustic data. 17 Echoview format (EV) format analysis files. FSS format biological data for 33 pelagic hauls. CTD data for 32 vertical dips. Continual Thermosalinograph data. Continual AGDS data. continual hydrophone recordings for Cetaceans. Objectives:To conduct an acoustic survey to estimate the abundance and distribution of herring in the north western North Sea and north of Scotland between 58º30’-62ºN and from 4ºW to 2ºE.To obtain biological samples for echosounder trace identification using a pelagic trawl.To test feasibility of using GoPro cameras mounted in the net and on a dropframe to further aid in species identification in the echogram scrutiny process.To obtain samples of herring for biological analysis, including age, length, weight, sex, maturity and ichthyophonus infection.To obtain hydrographic data for comparison with the horizontal and vertical distribution of herring. To obtain acoustic recordings of cetaceans during the survey using a towed hydrophone system. |
Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Sampling and Fishing gear: Midwater trawls PT160 Multisampling pelagic cod-end with one fine mesh cod-end. Seabird 19plus CTD GoPro cameras x 2 with underwater housings and lights Scanmar trawl eye sensor Towed Hydrophone array. Objectives:To conduct an acoustic survey to estimate the abundance and distribution of herring in the north western North Sea and north of Scotland between 58º30’-62ºN and from 4ºW to 2ºE.To obtain biological samples for echosounder trace identification using a pelagic trawl.To test feasibility of using GoPro cameras mounted in the net and on a dropframe to further aid in species identification in the echogram scrutiny process.To obtain samples of herring for biological analysis, including age, length, weight, sex, maturity and ichthyophonus infection.To obtain hydrographic data for comparison with the horizontal and vertical distribution of herring.To obtain acoustic recordings of cetaceans during the survey using a towed hydrophone system. Acoustic data will be collected at four frequencies (18, 38, 120 and 200 kHz) between 03:00 and 23:00 hours. Fish shoals seen on the echosounder will be identified using a pelagic trawl (PT160). Survey trawling operations will be carried out between two and four times per day at any time between 03:00 and 23:00 using the standard PT160 trawl. Where dispersed or layered aggregations are seen, the multisampler cod end may be used unless large aggregations are present in the area. Samples of all species caught will be measured for length to partition the echo integral amongst species and size classes for target strength functions. Fish will also be weighed to establish a length-weight relationship. Otoliths will be collected from a sub-sample of the herring according to the following length stratified scheme to determine age; two per 0.5 cm class below 22 cm, five per 0.5 cm class from 22.5-27.5 cm and ten per 0.5 cm class for 28.0 cm and above. For each herring in the subsample the state of maturity, gonad weight, liver weight, whole and gutted weight, presence of food in the stomach as well as the presence of Icthyophonus infection will be recorded. The maturity scale used throughout the survey will be the Scottish 8 stage scale. A GoPro camera and underwater lights will be mounted in the trawl as required to aid in species identification in the echogram scrutiny process by delivering additional information on time of capture of and composition of the catch. Where traces are seen in untrawlable areas, a GoPro camera may be deployed manually on a small drop frame to investigate the feasibility of using this technique to verify species composition of echosounder traces. This exercise will be conducted with the vessel in DP. A towed hydrophone will be deployed over the stern roller during survey transects. The hydrophone will remain deployed while the vessel is at survey speed but will be recovered prior to commencement of fishing operations and environmental sampling. Where required, a vertical hydro dip will be carried out immediately following a pelagic trawl, this will require the vessel to use its DP system to remain on station. The decision to carry out vertical dips will be based on the requirement to achieve one station in each ICES rectangle. The ships thermosalinograph will be run continuously to obtain sea surface temperature and salinity throughout the survey area. |
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 | Acoustic backscatter in the water column | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Cetacean abundance | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Cetacean behaviour | |
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 | |
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 | Water column temperature and salinity | |
Geographical coverage | ||
North | The northern-most limit of the data resource in decimal degrees | 61.5 |
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 | ||
46F0 | ||
47F0 | ||
48F0 | ||
49F0 | ||
50F0 | ||
51F0 | ||
46F1 | ||
47F1 | ||
48F1 | ||
49F1 | ||
50F1 | ||
51F1 | ||
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 | |
Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
Organisation name | Marine Scotland | |
Phone | +44 (0)300 244 4000 | |
Delivery point | 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 | Marine Scotland Science | |
Delivery point | 375 Victoria Road | |
Postal code | AB11 9DB | |
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 | ISO restriction code chosen from ISO 19115-1 Codelist | otherRestrictions |
20 Limitations on Public Access – Other constraints | Any restriction on the use of the resource such as the need to agree to certain licence conditions. | no limitations to public access |
21 Conditions for Access and Use - Use limitation | Any restrictions imposed on accessing the resource such as the need to agree to certain licence conditions. | 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. | 2016-03-29 |
Metadata date | The date when the content of this metadata record was last updated. | 2019-10-22 |
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 |
© OpenStreetMap contributors