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A PhD was undertaken at the University Marine Biological Station Millport (UMBSM) and presented to the University of London. The importance of inshore nursery grounds for commercially important fish species was investigated in the west coast of Scotland. The study investigated the spatial and temporal variations in diet, condition and growth and community analysis techniques were incorporated. Otolith microchemistry was investigated as an effective means of identifying differences in the environmental history of whiting during their initial post-settlement phase. It was suggested that adult populations could potentially be linked to inshore nursery areas.
University Marine Biological Station (UMBS), Millport
DASSH terms and conditions apply
| Other details | ||
| Internal code | Internally assigned metadata identifier | 3549 |
| 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. | 2005 UMBSM Clyde Sea The Importance of Inshore Areas on the West Coast of Scotland as Nursery Grounds for Commercially Important Fish Species |
| 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. | 5fff2a9d22473d1a842a1edca033047a |
| Resource Identifier | This is the code assigned by the data owner. | UMBSM9494 |
| 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 | 2002-01-01 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2002-09-01 |
| Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | inapplicable |
| 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'. | notPlanned |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | A PhD was undertaken at the University Marine Biological Station Millport (UMBSM) and presented to the University of London. The importance of inshore nursery grounds for commercially important fish species was investigated in the west coast of Scotland. The study investigated the spatial and temporal variations in diet, condition and growth and community analysis techniques were incorporated. Otolith microchemistry was investigated as an effective means of identifying differences in the environmental history of whiting during their initial post-settlement phase. It was suggested that adult populations could potentially be linked to inshore nursery areas. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | The patterns of distribution of fish and macro-invertebrate species in inshore waters in the Clyde Sea (Loch Striven) was investigated. The Clyde Sea area was sampled using a Harkiss rock hopper trawl, with sole rope of 18m and headline of 14m. The mesh size was 70mm with a binder at the cod-end of 25mm. Clyde Sea sites were sampled using RV Aora and RV Aplysia which belong to the University Marine Biological Station Millport (UMBSM). Two sampling periods were conducted. Winter sampling was conducted during the months of January-March 2002 (when sea temperatures were at their lowest) and summer sampling was conducted from July to September 2002, when the sea temperatures were at their highest. The rock hopper trawl was towed at an approximate speed of 2.5 knots for a fixed duration of 20 minutes. The positions of the fixed trawl tracks were recorded using Microplot. This ensured that replicate samples were obtained from the same trawl track during each sampling process. Once hauled, the sample was sorted into species and was enumerated (commercially important species, non-commercially important species and macro-invertebrates). The commercially important fish species within the sample were further assessed for age, condition, diet and length. Ontogenic changes in habitat utilisation in commercially important fish species present in inshore waters was investigated. The samples utilised for population structure assessments were obtained from the same sites and by the same methods as previously stated. Only commercially important fish species identified as being particularly high in abundance were included for analysis. Species included cod, haddock, whiting, poor cod, Norway pout, plaice, dab and long-rough dab. Specimens were measured for total length when in the laboratory and sagittal otoliths were removed from a sub-sample and stored in labelled paper envelopes. Ten pairs of otoliths were obtained from each species of each length class (cm) from each month. Specimens were aged using techniques which were employed by FRS, marine Laboratory Aberdeen. Gadoid otoliths were sectioned across the nucleus and mounted in black plasticine and painted with baby oil. The otolith was viewed using a light microscope at a low magnification. Light was applied at a 40 degree angle. The otolith of flatfish were submerged in water and viewed using a light microscope as above. Percentages by age were also recorded for each length class and length frequencies were produced. During a tagging study, the site fidelity of gadoid (cod, haddock, whiting) juveniles (0+) was assessed. Fish were caught over a three day period from an area surrounding a fixed trawl track (T1) at depths of 20-25m using a Grassrope prawn trawl. The cod-end mesh size was 22mm. The trawl was deployed by RV Aplysia (UMBSM). Eight trawls (10min) were performed during the three day period. Catch was hauled slowly to reduce swimbladder distension. A total of 96 cod (8-14cm total length), 979 haddock (9-15cm total length) and 84 whiting (9-18cm total length) were tagged and released. During the tagging process, fish were placed into water baths with running water and anaesthetised using MS-222 and measured to the nearest mm. TBF 2 tags (Hallprint, Australia) were used. After tagging, fish here placed in a recovery bath before being released in the centre of the fixed trawl track (T1). Members of FRS carried out this procedure, following Home Office regulations. Once released, replicate trawls (20min) at 2.5 knots were carried out on a weekly basis for six weeks. The trawls followed T1 and several adjacent tracts (T2-5). Trawls tracks covered a distance of 1.5km. The vertical and horizontal distances between tracks were 0.75km. Numbers of cod haddock and whiting in the trawl catch were recorded. Incidence of tagged fish in catches were recorded and length (mm) was measured. To investigate the temporal and spatial patterns in diet, condition and growth in cod haddock and whiting inhabiting inshore areas on the west coast of Scotland, fish which were sampled for distribution patterns were utilised. Stomach content analysis was performed on length stratified sub-samples of cod, whiting and haddock present in catches during each season. Only fish collected in the morning and transported to the laboratory within three hours were used. Stomachs were removed and preserved in 70 percent ethanol and provided with a reference number. Otoliths were removed and age was assigned to specimens. An estimation of stomach fullness was recorded and then stomach contents were removed and placed into a Petri dish. The contents were sorted into taxonomic groups where possible. Blotted weight (g) and numbers per group were recorded. Stomach content data were sub-divided by age (0+ and 1+) and by season. The percentage frequency of occurrence and composition of each prey group was calculated for each sub-division of fish. The condition of fish was also assessed by stomach and otolith analysis. Condition data was supplemented by a sampling programme conducted in lochs adjacent to the Sound of Sleat. Length (cm) and wet eviscerated weight (EW) (g) of specimens were recorded and Fultons condition index (K) was calculated. Hepatosomatic index was also calculated. Post-settlement growth was assessed by aging gadoid specimens using otoliths. Samples were obtained during July and September. The mean length of 0+ fish was determined. The microchemistry of the core and juvenile region of otoliths in whiting inhabiting different inshore areas on the west coast of Scotland was investigated. Fish samples were collected from three sites in the Clyde Sea area using a hopper trawl during October 2005. Age 0+ whiting (11-20cm total length) were collected. Post capture, fish were frozen for three weeks then defrosted and otoliths removed. The defrosted total length (mm) of specimens was recorded and the right otolith was removed using an acid-washed plastic knife and forceps which were rinsed in Milli-Q water and left to dry overnight in acid-washed epindorf tubes. otolith weight (nearest 0.001g) was recorded. Otoliths were always handled with acid-washed equipment. Otoliths were cleaned with 1 percent UltraPure nitric acid for 1 minute then thoroughly rinsed in Milli-Q water and placed into a new acid-washed epindorf tube to air dry. When dry otoliths were glued to a glass slide using Araldite and let to set. The sagittal plane of the otolith was ground until the primordium was reached, using silicon carbide paper. Otoliths were then polished using 3 micron aluminium oxide lapping film and rinsed in Milli-Q water. Samples were left to dry overnight in a class 100 laminar flow cabinet. Mounted otoliths were stored in acid-washed Petri dishes and sealed inside two ziplock plastic food bags until further analysis. Otoliths were analyzed by Elemental Research Inc., North Vancouver, Canada using laser ablation inductively coupled mass spectrometry (LA-ICPMS, LUMONICS YM-200). Six elements were selected for analysis (Li, Mg, Mn, Cu, Sr, Pb). Assays were conducted using Q-switched energy pulses (approximately 5mj). Each assay comprised of 8 sweeps (5s per sweep). This resulted in acquisition time of 40 seconds. The beam diameter at focus was 15 microns. Isotopic counts were based on 25 channels per amu. Re-calibration was conducted between each block of 7 assays. |
| 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 | Species distribution | |
| 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 morphology, age and physiology | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Fish behaviour | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 56.0068 |
| East | The eastern-most limit of the data resource in decimal degrees | -5.0304 |
| South | The southern-most limit of the data resource in decimal degrees | 55.8672 |
| West | The western-most limit of the data resource in decimal degrees | -5.1327 |
| 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 | University Marine Biological Station (UMBS), Millport | |
| Individual name | Carly Cassidy | |
| Postal code | KA28 0EG | |
| City | Millport | |
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | Data Archive for Seabed Species and Habitats (DASSH) | |
| Position name | Data Manager | |
| Phone | 01752 633102 | |
| Fax | 01752 633291 | |
| Delivery point | Marine Biological Association of the UK, The Laboratory, Citadel Hill | |
| Postal code | PL1 2PB | |
| City | Plymouth | |
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | University Marine Biological Station (UMBS), Millport | |
| Individual name | Data Manager Universtity Biological Station, Millport | |
| Position name | Data Manager | |
| Postal code | KA28 0EG | |
| City | Millport | |
| 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 | University Marine Biological Station (UMBS), Millport | |
| Individual name | Kathryn Stevenson | |
| Postal code | KA28 0EG | |
| City | Millport | |
| 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. | DASSH terms and conditions apply |
| 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. | Restrictions apply. Please contact UMBSM for further details. |
| Available data formats | ||
| Data format | Format in which digital data can be provided for transfer | Documents |
| 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. | 2005-02-01 |
| Metadata date | The date when the content of this metadata record was last updated. | 2019-11-04 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN Discovery metadata standard |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 2.3.8 |
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