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Echogram print out with 5 minute EDSU acoustic data. Hard copy biological data sheets 10 demersal and 14 pelagic hauls. CTD data for 17 vertical dips. Continual AGDS data. Objectives 1. To carry out detailed acoustic surveys in selected lochs and the Sound of Sleat using the Seabat 6012 to determine the distribution of herring and sprat. Concentrations of pelagic fish will be sampled using the PT15J. Species composition and length frequency distributions o; the fish caught will be determined. Sub samples will be weighed and otilithed to establish length weight relationships. Herring samples will be taken for DNA analysis. 2. To carry out demersal trawls in each of the sea lochs to determine the abundance, distribution and variation of fish species and any epibenthic mega-fauna using the BT158 trawls and the 2.8 m beam trawl where appropriate.. At each trawl station the length frequency of all species will be taken and sub samples of the major commercial species will be weighed and otiliths taken. Stomach contents will be removed from selected species for trophic studies, the carcasses will be bagged and frozen for parasitic analysis. In addition where possible 100 skin samples per selected species per location will be removed for genetic studies.
Scottish Government (Marine Scotland)
no limitations to public access
Other details | ||
Internal code | Internally assigned metadata identifier | 6189 |
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. | 1501C- West coast lochs-small pelagics acoustic survey- Clupea cruise 1501 |
Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | Herring, sprat, west coast lochs, acoustic survey, Clupea, 1501C |
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_1739 |
Resource Identifier | This is the code assigned by the data owner. | Marine_Scotland_FishDAC_1739 |
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 | 2001-10-25 |
End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2001-11-08 |
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. | Echogram print out with 5 minute EDSU acoustic data. Hard copy biological data sheets 10 demersal and 14 pelagic hauls. CTD data for 17 vertical dips. Continual AGDS data. Objectives 1. To carry out detailed acoustic surveys in selected lochs and the Sound of Sleat using the Seabat 6012 to determine the distribution of herring and sprat. Concentrations of pelagic fish will be sampled using the PT15J. Species composition and length frequency distributions o; the fish caught will be determined. Sub samples will be weighed and otilithed to establish length weight relationships. Herring samples will be taken for DNA analysis. 2. To carry out demersal trawls in each of the sea lochs to determine the abundance, distribution and variation of fish species and any epibenthic mega-fauna using the BT158 trawls and the 2.8 m beam trawl where appropriate.. At each trawl station the length frequency of all species will be taken and sub samples of the major commercial species will be weighed and otiliths taken. Stomach contents will be removed from selected species for trophic studies, the carcasses will be bagged and frozen for parasitic analysis. In addition where possible 100 skin samples per selected species per location will be removed for genetic studies. |
Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Clupea was delayed leaving Fraserburgh until the evening of the 26th due to bad weather. Scientific staff joined the vessel at Kyle on the evening of the 27th. Clupea then steamed to anchor in Balmacarra Bay where the acoustics system was calibrated prior to the start of the survey. Acoustic transects and Pelagic trawling began the following day in Loch Nevis, and were repeated in Lochs Hourn, Duich and Kishorn with only slight delays due to the weather. Bottom sediment samples were taken in. Loch Alsh to validate previous Roxann data. CTD samples were taken at each trawl station. The acoustic survey and pelagic trawling finished on 1 November and a change over of scientific staff and fishing gear took place at Kyle. On the 2nd Clupea steamed to Loch Hourn where demersal and beam trawling were undertaken on suitable areas clear of creels. Similar sampling was carried out in Loch Nevis, Loch Duich and Loch Kishorn. Where possible trawls were ,lconducted close to and away from fish farms to determine any differences infish densities or species variability, butthis proved difficult to achieve due to creel activity in the areas. Sediment samples were also taken in each loch to further check the ROXANN data collected on previous cruises. CTD samples were taken at each trawl station. Problems occurred with the ship's navigation system and anchor winch near the end of the cruise, causing minor delays. Scientific staff disembarked at Kyle on the 7th and Clupea left for Fraserburgh, but was delayed en route by bad weather, arriving in Fraserburgh on the 1oth. Pelagic To ensure adequate acoustic coverage of each loch within the time constraints of the survey a pre-determined zig zag pattern of transects were carried out with approximately 300 m between turning points, Pelagic trawls were subsequently targeted at suitable fish marks pinpointed by the EK500. A total of eight pelagic trawls were conducted, three in Loch Nevis, two in Loch Hourn, two in Loch Duich and one in Loch Kishorn. Size distribution for Herring and Sprat are shown in Fig 1. Herring were otilithed and examined for sex, maturity and lcthyophonus infection. Total and evicerated weights were taken from a selected sample. Stomachs were collected for future analysis and fin clips were taken for DNA analysis. Sprats were measured ,weighed and otilithed. An attempt was also made to use the Seabat (120 khz) to observe potential fish shoals around and beneath fish farm cages, however the shallow depth and the fixed angle of the sender unit produced unusable images. A pan and tilt may overcome this. Juvenile Scad were present in most of the Pelagic tows this year, ranging in size from 5-12 ems. Demersal Bottom trawling was undertaken using the BT 158 fitted with a 10 mm cod-end. A total of 13 trawls with the BT158 were completed, three in each of the study lochs and one in the Sound of Sleat. Each trawl was sampled for all species caught. Species were sampled according to standing instructions, in addition stomach samples (three fish per cm size group) were collected from cod, haddock, whiting and saithe. The remaining carcass of each fish were frozen for additional parasite and DNA analysis. The size range in each loch for the major species is shown in Fig 1. CTDs were taken at each trawl station. Beam Trawls Beam trawling was undertaken using a 2.8 m beam with the cod-end tied to 20 mm mesh to prevent mud clogging the cod-end. Nine hauls were completed, four in Loch Nevis, three in Loch Hourn and two in Loch Kishorn. In general catches of all species were small but the variety of macrobenthic organisms was considerably higher in the beam trawl than the Otter trawl. A complete species list is currently being prepared for all trawls . A cruise chart is attached showing the position of each trawl undertaken during the cruise. Grab Sampling Sampling was undertaken at 57 stations to validate the ROXANN data from previous cruises. Positions were chosen according to the defined substrate colour differences on the prepared Roxann 38 and 120 khz charts for the area. General As in previous cruises, fleets of creels posed a problem, severely restricting the areas available to fishing. On two occasions fleets became tangled in the gear resulting in a considerable loss of time. On each occasion the tows were clear of marker floats. |
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 | 57.5 |
East | The eastern-most limit of the data resource in decimal degrees | -5 |
South | The southern-most limit of the data resource in decimal degrees | 57 |
West | The western-most limit of the data resource in decimal degrees | -6 |
Regional sea | 43E4 | |
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 | 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. | 2016-05-05 |
Metadata date | The date when the content of this metadata record was last updated. | 2016-05-19 |
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 |
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