Dull adnabod

Dynodydd

NRW_DS110038

Teitl Amgen

• 2006 CCW Survey of the tentacled lagoon worm (Alkmaria romijni) at Carew Castle Mill Pond MRCCW30000000040
• 2013 DRAFT CCW Carew Lagoon Survey MRCCW3000000007B
• Arolwg o fwydyn tentaclog y morlyn (Alkmaria romijni) ym Mhwll Melin Castell Caeriw

Laith Metadata

English

Datganiad

Initial survey- A sampling pattern of 20 stations distributed evenly across the whole Mill Pond (stations between 45 and 80m apart), was established prior to the survey using Mapinfo GIS software. The positions derived from the GIS were input into a Garmin handheld GPS in order to enable location of the sampling stations in the field. Once sampling stations had been located , a single grab of the top 20 cm of sediment were taken using a 0.025m2 hand held Ekman grab. Once the grab arrived at the surface, a sample of the water draining out of the grab was put in a pot for later determination of the salinity at the sediment surface. The grab samples were then sieved through a 0.5 mm mesh until most of the fines had been washed away. The sieved sample was then placed in a labelled bucket and topped up with water from the Mill Pond. Samples were taken back to the laboratory. The number of Alkmaria romijni worms together with other species found in the samples were counted. The salinity of the water samples collected from the grabs determined using an Atago hand-hand refractometer. Follow up survey- a sampling technique was adopted following the principles of Adaptive Cluster Sampling (ACS), in which sampling effort is modified in response to observations made during the course of the survey. Initial survey 27 February 2006 follow up survey 15 March 2006.

Dyddiad cyfeirnod y set ddata (Cyhoeddiad)

2006-11-30

Rhychwant

Rhychwant

Hyd

SIR BENFRO - PEMBROKESHIRE

N

W

E

S

 

Dosbarthiad

Ansawdd

Allweddeiriau

System Cyfeirio Gofodol

Cynnwys

Cyfyngiadau