Arenicola marina has size between 25 and 36 cm(Tyler-Walters, H. 2001).
Live along shores in Western Europe in 20-40 cm deep in U/J shape burrows
in(Tyler-Walters, H. 2001).
Body is cylindrical and consist of thorax and abdomen( Tyler-Walters, H.
2001).
A. marina ingest organic material(Tyler-Walters, H. 2001).
They are pink, red and green in colour (Tyler-Walters, H. 2001).
http://www.arkive.org/lugworm/arenicola-marina/info.html
Used when you cannot get all in a population at a specific
time
when the site is visited (Greiser &Faubel, 1992).
Identify area and size where species mostly occur (coast).
A random sample of A. marina is captured (not injured) with a
garden fork (Greiser &Faubel, 1992).
Sand was broken down and sorted by hand using gloves.
Marked and releasednot toxic substance(Greiser &Faubel, 1992).
After redistributed itself, a second random sample is taken
(Greiser &Faubel, 1992).
The percentage that was marked in the recapture sample is equal
to the percentage of the population that was marked in the
beginning (Greiser &Faubel, 1992).
Problems
All the individuals in the population have an equal
probability of being captured (McLusky et al., 1983).
Some of the individuals after been captured may
avoid the traps after that, or some may be attracted to the
traps (McLusky et al., 1983).
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Use transects to estimate the total number of burrows
(Flach & de Bruin, 1993).
Transects is a sample unit where the length is greater than
the width (Flach & de Bruin, 1993).
Use belt transects (Flach & de Bruin, 1993).
Use large enough area and also different areas randomly
(Flach & de Bruin, 1993).
When burrow opening is in the range of the belt it is
counted, otherwise not (Flach & de Bruin, 1993).
Get the total number of burrows in the the population
from the average number of burrows per transect and the
total area of the population (Flach & de Bruin, 1993).
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30/01/89775_large.jpg
•Flach, E. C., de Bruin, W. (1994). The activity of cockles, Cerastoderma edule
(L.), and lugworms, Arenicola marina L., make Corophium volutator (Pallas)
more vulnerable to epibenthic predators: a case of interaction modification. J.
exp. mar. Biol. Ecol. (in press)
•Greiser, N. & Faubel, A., 1992. Biotic factors. In
Introductionto the study of
meiofauna (ed. R.P. Higgins and H. Thiel), pp.79^114. Washington DC:
Smithsonian Institution Press.
•Macintosh, D. J., 1988. The ecology and physiology of decapods of mangrove
swamps. Symp. Zool. Soc. Lond. 59:315-341.
•McLusky,D.S.,Anderson,F.E.&Wolfe Murphy,S.,1983.Distribution and population
recovery of Arenicolamarina and other benthic fauna
afterbaitdigging.MarineEcologyProgressSeries,11,173^179.
•Tyler-Walters, H. 2001. Arenicola marina. Blow lug. Marine Life Information
Network: Biology and Sensitivity Key Information Sub -programme [on-line].
Plymouth: Marine Biological Association of the United Kingdom. (November,
2002) http://www.marlin.ac.uk/species/Arenicolamarina.html
•http://content8.eol.org/content/2009/07/30/01/89775_large.jpg
•http://www.arkive.org/lugworm/arenicola-marina/info.html