DAERA Imposex in Nucella lapillus National Survey - 2017
The DAERA Northern Ireland National Imposex Survey is tri-annual (once every three years) assessment of the bioeffects of Tri-Butyl-Tin (TBT) on Nucella lapillus. Data is collected for the purposes of reporting to Water Framework Directive (WFD), the Marine Strategy Framework Directive (MSFD), the Clean Safe Seas Evidence Group (CSSEG), and the OSPAR Commission. Data consists of VDS (Vas Deferens Sequence) values for female specimens, and penis length measurements in millimetres of all specimens.
dataset
http://www.appsd.daera-ni.gov.uk/marinemapviewer
name: Northern Ireland Marine Mapviewer
description: A link to the web service or dataset
DAERA-NIM
http://www.daera-ni.gov.uk
eng
urn:ogc:def:crs:EPSG::4326
health
revision
2008-01-06
revision
2009-11-16
creation
2006-08-31
-7.3833
-5.2739
55.3492
53.9639
creation
2009-06-18
Irish Sea
creation
2009-06-18
Minches & Western Scotland
creation
2009-05-01
39E2
creation
2009-05-01
37E3
creation
2009-05-01
39E3
creation
2009-05-01
37E4
creation
2009-05-01
38E4
creation
2009-05-01
39E4
creation
1954-01-01
Inner Seas off the West Coast of Scotland
creation
1954-01-01
Irish Sea and St. George's Channel
creation
2014-05-16
VIIa
creation
2014-05-16
VIa
revision
2010-01-01
littoral
2017-05-30
2017-07-18
publication
2018-11-21
creation
2017-05-31
revision
2018-11-20
asNeeded
Samples are collected onshore by trained field staff. Specimens are transferred to the laboratory and stored in oxygenated tanks for no more than 48 hours prior to dissection. Vas Deferens Stage (VDS) categories are assessed using groupings described in Gibbs, P.E., Bryan, G.W., Pascoe, P.L. and Burt, G.R., 1987. The use of the dogwhelk Nucella lapillus as an indicator of tributyltin (TBT) contamination. J. Mar. Biol. Ass. UK 67:507-523. Male and female (if penis present) penis lengths are measured in millimetres for use in calculation of the Relative Penis Size Index (RPSI). Data quality is assured by participation in the QUASIMEME quality assurance scheme. Participant laboratories are sent sub-samples from the same population, and returned values must fall within accepted standard error limits for the entire community.
Although the Department (of Agriculture, Environment and Rural Affairs - DAERA) has made every effort to prepare the data and believes the information it contains is reliable within the context in which the data was originally generated/collected, errors within the data remain a possibility. Therefore the Department gives no warranty regarding the accuracy or suitability of the data for the data requestors intended use, and accepts no responsibility for any errors or omissions, or for the use of, or results obtained from the use of this data, whether in part or in whole.
No restriction to public access
Data contact
Department of Agriculture, Environment and Rural Affairs
Marine.InfoRequests@daera-ni.gov.uk
originator
Data contact
Department of Agriculture, Environment and Rural Affairs
Marine.InfoRequests@daera-ni.gov.uk
custodian
Data contact
Department of Agriculture, Environment and Rural Affairs
Marine.InfoRequests@daera-ni.gov.uk
pointOfContact
2018-11-21