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Metadata: 1101S- HERAS Herring acoustic survey North Sea- Scotia cruise 1101S
Abstract:
Daily folders (19) of Simrad (.ek5 format) acoustic data. Echoview format (EV) format analysis files. Excel biological data for 49 pelagic hauls. CTD data for 14 vertical dips. Continual AGDS data. Objectives: 1. To participate in an ICES - coordinated acoustic and mid-water trawling survey in the north western North Sea and North of Scotland between 58° to 62°N 4°30' W to 2°E excluding Norwegian and Farces waters. 2. To obtain samples of herring for biological analysis, including age, length, weight, sex, maturity and ichthyophonus infection. 3. To obtain thermosalinograph recordings of surface temperature and salinity throughout the survey area. CTD (and XBT) profiles of temperature and salinity at depth for analysis with herring distributions. - 4. To obtain simultaneous coverage with FRV Michael Sars of ICES rectangles 46E9,47E9,49E9 and 50E9.
Data holder:
Scottish Government (Marine Scotland)
Use constraints:
no limitations to public access
Other details | ||
Internal code | Internally assigned metadata identifier | 6223 |
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. | 1101S- HERAS Herring acoustic survey North Sea- Scotia cruise 1101S |
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_1738 |
Resource Identifier | This is the code assigned by the data owner. | Marine_Scotland_FishDAC_1738 |
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 | 2001-07-03 |
End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2001-07-23 |
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 (19) of Simrad (.ek5 format) acoustic data. Echoview format (EV) format analysis files. Excel biological data for 49 pelagic hauls. CTD data for 14 vertical dips. Continual AGDS data. Objectives: 1. To participate in an ICES - coordinated acoustic and mid-water trawling survey in the north western North Sea and North of Scotland between 58° to 62°N 4°30' W to 2°E excluding Norwegian and Farces waters. 2. To obtain samples of herring for biological analysis, including age, length, weight, sex, maturity and ichthyophonus infection. 3. To obtain thermosalinograph recordings of surface temperature and salinity throughout the survey area. CTD (and XBT) profiles of temperature and salinity at depth for analysis with herring distributions. - 4. To obtain simultaneous coverage with FRV Michael Sars of ICES rectangles 46E9,47E9,49E9 and 50E9. |
Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Main Activities Throughout the acoustic survey acoustic data was collected using a Simrad EK500 echosounder operating at 38, 120, 200 and 18 kHz, with raw data collected using EchoView software. The data were scrutinised in board and the allocation to species carried out within EchoView. Fishing with a PT160 midwater trawl was carried out on observed fish traces on an opportunistic basis. The locations of the trawl hauls are shown in Figure 1 and catch data summarised in Table 1. Forty-nine trawls hauls were taken, of which 40 contained more than 100 herring. In addition to 15,292 herring that were measured (an average of 382 per haul} a total of 4,531 herring were sampled for gonad, stomach and total weight, sex, maturity, otolith and macroscopic evidence of ichthyophonus infection. The thermosalinograph was runthroughout • the cruise and a total of 17 CTD stations were carried out, (one per day at 2200 GMT each night) (Fig. 2). A total of 45 XBT stations were carried out during the survey to provide information on temperature profiles between CTD stations, these were located at trawl stations. Results All the survey objectives were met. The common survey area with FRV Michael Sars was completely covered. The cruise was completed successfully, with no time lost due to weather. The total mileage surveyed was approximately 2,585 nautical mile (Fig. 1) with a total of 1,034 acoustic log intervals recorded. Two successful calibrations were carried out, which gave consistent results with 1999 with a difference of Jess than 0.2 dB for the 38 kHz system. Calibrations on 200 and 120 kHzwere carried out and agreed to a similar precision. Calibration of the 18 kHz hydrographic sounder was performed for the first time and an initial value determined. Extensive continuous medium density concentrations of herring were found North of 58'30'N to 59'00'N between 1'W and 1°E. High concentrations of herring were found east of Shetland on both sides and to the north of Poby Bank. Very substantial shoals were seen west of • Muckle Flugga and off Ramna Stacks. Extensive medium density layers of herring were found north west of Orkney. A full stock estimate and survey report will be prepared shortly. lchthyophonus infection within North Sea herring remains at a very low level, but is higher than last year at 6 of the 4,531 herring examined. |
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 | 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 |
West | The western-most limit of the data resource in decimal degrees | -4 |
Regional sea | 45E6 | |
46E6 | ||
47E6 | ||
48E6 | ||
49E6 | ||
45E7 | ||
46E7 | ||
47E7 | ||
48E7 | ||
49E7 | ||
50E7 | ||
45E8 | ||
46E8 | ||
47E8 | ||
48E8 | ||
49E8 | ||
50E8 | ||
51E8 | ||
45E9 | ||
46E9 | ||
47E9 | ||
48E9 | ||
49E9 | ||
50E9 | ||
51E9 | ||
52E9 | ||
45F0 | ||
46F0 | ||
47F0 | ||
48F0 | ||
49F0 | ||
50F0 | ||
51F0 | ||
52F0 | ||
45F1 | ||
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 | 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 | |
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 |