Llantrisant
Sub-Aqua Club
www.llantrisantdivers.com
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Marine
Conservation & Underwater Photography
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| Whale
Sharks and Mantas in Hanivaru Bay, Baa Atoll, Maldives |
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In
September 2011 the club is running a trip to Baa Atoll
in the Maldives. The main purpose of this expedition
is to have close encounters with Manta Rays and Whale
Sharks. The plan is to visit Baa Atoll. There is a site
in this atoll where mantas and whalesharks are frequently
seen in large numbers. The following gives some idea
of what we can expect to find on this expedition.
Hanifaru,
an island located in Baa Atoll in the Maldives Archipelago,
is one of the world's most important sites for the majestic
manta ray. Each year between May and November the tide
works its magic to suck krill and other plankton into
Hanifaru Bay. The tiny creatures then become trapped
and form an irresistibly thick soup. This delightful
offering attracts manta rays from all over the Maldives
and they converge here to feed in their hundreds.
Hanifaru, is an uninhabited island with a natural underwater
bay -locally known as 'Vandhumaafaru Adi'- famous for
whale sharks. The bay, known to divers as 'Aquarium'
is home to a large numbers of whale sharks, grey sharks,
manta rays and sting rays, is also a nursery for these
species.
The
National Geographic Magazine exclusively reported on
this phenomenon in their July 2009 issue. It covers
the work of marine biologist Guy Stevens and features
photographs by photographer Thomas Peschak. Stevens,
who has been running the manta ray research project
from the Four Seasons Landaa Giraavuaru resort for the
past five years, says, "Hanifaru
is one of the last places on the planet where manta
rays and whale sharks still roam in numbers reminiscent
of times gone by".
In a giant step towards protecting these threatened
creatures the Maldives Government has proclaimed the
waters around Hanifaru in Baa Atoll a marine protected
area (MPA). This and the creation of two other MPAs,
An'gafaru also in Baa atoll and Maamigili in the South
Ari atoll, demonstrates the Maldives government's forward
thinking in marine conservation.
Here
is a copy of a recent email from Lisa on MV Sea Queen:
Hi Pete
Yep,
thats were we go and have done for the past three years.
I know Guy Stevens. All my best video footage of Whale
Sharks & Mantas are from Hani Faru and that's where
you will go when you come back out on Sea Queen.
It's
an amazing place i just love Baa.. all our best sightings
have been around Sept/Oct.
Best
fishes Lisa
Some
useful web links:
National
Geographic
Save
Our Seas Foundation
Bluepeace
Blog
YouTube
- Hanifaru
Maldives
Dive Travel - Blog
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| Our
Marine Conservation Officer - Ceri Jones - Monthly Blog
- May 2009 |
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With
the sea temperatures getting warmer, May begins with
the bank holiday and as all the new members are getting
more dives under their belt so the marine life becomes
more abundant. More weird and wonderful creatures begin
to appear on the sea bed coming back from deeper waters
to our shallow shores.
Events
this month:
- May
9th & 10th -
Seasearch dives around Ramsay/ North Pembs.
Contact; Kate Lock - www.seasearch.org.uk
- May
16th - N.A.R.C. clean up. Hobbs Point.
Contact; Dave Kennard - www.narc-cc.org
- May16th
& 17th - Seasearch dives around Newquay
and Cardigan. Contact; Kate Lock - www.seasearch.org.uk
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As
new events come in they will be added to this list
This
month we will take a look at the Phylum Echinodermata.
There are five main groups that make up this family.
Brittle stars, Feather stars, Starfish, Sea cucumbers
and Sea urchins.
The
name Echinoderm meaning "spiny-skinned" and
relates to the skeleton of these animals which consists
of bony plates which cover the body. They may stick
out to form spines in starfish or rigid plates in sea
urchins. All these creatures have tube feet and crawl
around using a hydraulic like system whereby they pump
water around a series of canals which then allow the
tubes to move independently in any direction so they
never need to turn around when changing direction.
In
starfish, Spawning takes place when the female releases
her eggs into the water and the male then releases his
sperm to fertilize the eggs. The eggs then go through
several larval stages before finally attaching themselves
to the sea bed where the young starfish then emerges.
Some species feed on other starfish but for most their
main food is molluscs such as mussels and clams. You
may witness this when you see the starfish arched up
on all the arms so that they completely cover the prey.
They then use the tubes of the feet to prise apart the
shell and then they extend their stomach out of the
body through their mouth where the juices in the stomach
then dissolve the inside of the mollusc and they eat
it alive. Nice!
Starfish
can regenerate them selves from a single arm so long
as part of the central body is still attached to it.
With most echinoderms having a central body with five
or more arms attached we have the common starfish (with
five arms) and then the common sun star with up to fourteen
arms.
Feather stars have ten long arms and brittle stars again
with five arms. The latter tending to gather together
to form "brittle star beds". These are the
largest group with around 18,000 species worldwide,
40 different species are found in UK waters.
Then
we have the sea cucumber "cotton spinner"
which is easily recognised and found grazing out in
the open and the"crevise sea cucumber" found
in cracks and crevices in the reef.
And
finally we have the sea urchins. These have a hard outer
surface, mostly round with a beak like mouth at the
centre on the underside.
Again these graze on the reef except for the sea potato
and the heart urchin which can be found buried in the
sand and soft sediment.
For
those keen to know more about our wonderful diversity
of marine life, see the M.C.S. publications.
You can contact the Marine Conservation Society on their
website at www.mcsuk.org/
.
><((())):>
Ceri Jones
Marine Conservation Officer.
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| Marine
Coastal Access Bill |
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In
late 2009 Parliament will enact the Marine and
Coastal Access Bill. This new law will establish
a new network of marine conservation zones to
protect species and habitats of national importance.
The Welsh Assembly Government has the aim for
the Welsh marine environment, as set out in the
Environment Strategy for Wales, to ensure clean
seas that will enable healthy and functioning
ecosystems that are biologically diverse and resilient.
In order to achieve this aim, however, it is vital
to understand what is biologically significant
in Wales marine environment, in order than
conservation zones are correctly sited to achieve
the conservation aims intended.
Throughout 2009, volunteer SCUBA divers have surveyed
the biology of the Pembrokeshire coast, through
the Marine Conservation Societys Seasearch
programme, in a weekly programme of intensive
marine surveys.
In
this open public lecture, Ms. Vicky Swales (Seasearch
Instructor) will present the results of the 2009
marine surveys and discuss the significance of
the biogeography and importance of marine species
for Wales. The likely impact of the Marine and
Coastal Access Bill on Wales, and the introduction
of Marine Protected Areas will also be discussed.
Anyone
with an interest in marine biology, marine biogeography
and SCUBA diving is more than welcome to attend.
Date:
Wednesday 14th October
Venue: Room GT9012,
Glyntaf Campus,
University of Glamorgan
Time: 19:30
Contact: Simon Jones, sdjones2@glam.ac.uk
or 01443 654 490
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Portuguese
Man-O-War in Pembrokeshire |
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BATHERS
are being warned about the possible presence of
Portuguese man owar jellyfish on Pembrokeshires
beaches.
During
the last week, four of the creatures which
carry a poisonous sting in their trailing tentacles
have been found washed up on Amroth beach
in the south of the county with another six found
on the waters edge.
Lifeguards
spotted two more just along the coast on the South
Beach in the popular resort of Tenby with another
three being spotted in Mill Bay near St Annes
Head at the mouth of the Milford Haven waterway.
The notices, which are being erected by the county
council at more than 30 of Pembrokeshires
Blue Flag and Green Flag beaches, warn of the
possible presence of Portuguese man owar
jellyfish.
Swimmers
are also advised to stay in lifeguarded areas
where possible.
Anyone
seeing a jellyfish is advised to inform the lifeguard
or contact a beach warden on 07770 574242 or 07721
861005.
Council
spokesman, Len Mullins, said: The Portuguese
man owar is a rare visitor to these shores
and the chances of swimmers actually encountering
one in the water while bathing are extremely slim.
However
they do possess a sting said to be ten times stronger
than an ordinary jellyfish and swimmers should
be aware of their possible presence.
Treatment
for the sting which leaves whip-like, red
welts on the skin involves washing with
salt water and then applying ice to dull the pain.
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| The
Portuguese Man-O-War |
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Anyone
unfamiliar with the biology of the venomous Portuguese
man-of-war would likely mistake it for a jellyfish.
Not only is it not a jellyfish, it's not even
an "it," but a "they." The
Portuguese man-of-war is a siphonophore, an animal
made up of a colony of organisms working together.
The
man-of-war comprises four separate polyps. It
gets its name from the uppermost polyp, a gas-filled
bladder, or pneumatophore, which sits above the
water and somewhat resembles an old warship at
full sail. Man-of-wars are also known as bluebottles
for the purple-blue color of their pneumatophores.
The
tentacles are the man-of-war's second organism.
These long, thin tendrils can extend 165 feet
(50 meters) in length below the surface, although
30 feet (10 meters) is more the average. They
are covered in venom-filled nematocysts used to
paralyze and kill fish and other small creatures.
For humans, a man-of-war sting is excruciatingly
painful, but rarely deadly. But bewareeven
dead man-of-wars washed up on shore can deliver
a sting.
Muscles
in the tentacles draw prey up to a polyp containing
the gastrozooids or digestive organisms. A fourth
polyp contains the reproductive organisms.
Man-of-wars
are found, sometimes in groups of 1,000 or more,
floating in warm waters throughout the world's
oceans. They have no independent means of propulsion
and either drift on the currents or catch the
wind with their pneumatophores. To avoid threats
on the surface, they can deflate their air bags
and briefly submerge.
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| The
Great Stingray Migration |
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Gulf
of Mexico

Like
autumn leaves floating in a sunlit pond, this
vast expanse of magnificent stingrays animates
the bright blue seas of the Gulf of Mexico.
Taken
off the coast of Mexico's Holbox Island by amateur
photographer Sandra Critelli, this breathtaking
picture captures the migration of thousands of
rays as they follow the clockwise current from
Mexico's Yucatan peninsula to western Florida.
Measuring
up to 6ft 6in across, poisonous golden cow-nose
rays migrate in groups - or 'fevers' - of up to
10,000 as they glide their way silently towards
their summer feeding grounds.

They
migrate twice yearly: north in late spring (as
pictured here) and south in late autumn.
There
are around 70 species of stingray in the world's
oceans, but these cow-nose rays (Rhinoptera bonasus)
have distinctive, highdomed heads, giving them
a curiously bovine appearance.
But
despite their placid looks, they are still armed
with a poisonous stinger, which can be deadly
to humans (even though sharks, their main predators,
are more likely to provoke them).
The
stinger, a razor-sharp spine that grows from the
creature's whip-like tail, can reach almost 15
inches in length and carries a heady dose of venom.
It
was a similar stinger that killed the hugely popular
Australian naturalist Steve Irwin in 2006.

But
even equipped with this powerful punch, cow-nose
stingrays are shy and non-threatening in large
'fevers'. Even when isolated, they will attack
only when cornered or threatened.
Unlike other stingrays, they rarely rest on the
seabed (where unsuspecting humans can step on
them) and prefer to be on the move.
They
migrate long distances, and can be found as far
south as the Caribbean and as far north as New
England.
They
use their extended pectoral fins to swim, and
often turn upside down, curling their fin tips
above the surface of the water - leaving terrified
swimmers convinced that they have seen a shark.
Their flexible fins also come in handy when rustling
up food. By flapping them rapidly over the seabed,
they stir up sand and reveal crabs, shellfish
and oysters, which they then feed on using their
powerful, grinding teeth.
Their
particular fondness for shellfish has made them
public enemy number one with oyster fishermen.
But
despite this, their numbers are exploding, thanks
in part to rising sea temperatures. They mate
every winter, and females produce a litter of
five to ten young.
Stingrays (which are related to skates and sharks)
have never been widely fished for food, mainly
because of their rubbery flesh.
But
barbecued stingray and dried fins are common in
Singapore and Malaysia, while pickled stingray
remains a traditional favourite in Iceland.
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| A
letter from Vicky Swales |
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(former
club marine conservation officer)
Dear
All
Hope you all have had a good summer of diving!
We have had several good Seasearch dives
in the last few weeks with some good visibility
and interesting seabed habitats but sadly
no Mantis Shrimps!. Those of you that would
still like to join us on a Seasearch dive
for the remainder of 2006 have a choice
of three dates left.
Wednesday 30th August, Sunday 10th September
and Sunday 17th September. If your interested
in joining us then please fill in the attachment
and return ASAP as places are filling up
quickly.
We also have a Seasearch Observer course
on Saturday 16th September, 9am - 4.30pm
at Hampshire Wildlife Trust in Botley. Again
please fill in the attachment if interested.
I would also like to ask if anyone is interested
in attending a Seasearch Surveyor course?
I know that several of you have enquired
earlier on in the year about the Surveyor
course and we are hoping to run one in October
subject to demand. I have provisionally
booked the weekend of the 7th/8th. You need
to already be a Seasearch observer and have
a up-do-date log book with all paperwork
signed off. This two day course does requires
a a dive on the second day for completion.
Please can you reply by Monday 11th September
to confirm if you are interested in attending
so I can finalise arrangements.
I do hope that you can join us on a Seasearch
dive soon.
Cheers, Vicky
Seasearch
Dives
Volunteers are to meet at Hayling Island
Ferry Pontoon on the Eastney side at 10am
for the 30th August, and 9am for both dives
in September.
Cost of dives is £15 subject to weather
conditions. Dive site, IOW. Further details
will be send once your booking form is received.
Please particularly make note of the following
points: Copies of the following must be
shown to the Dive Marshal before boarding
the vessel:
- Diving
qualification (and training agency).
- Date
of and expiry of doctors medical examination
or UK sport diver medical self-certification.
- Who
provides your diver third party insurance?
(e.g BSAC, SAA, DAN, PADI) if you are
not already insured, please ensure you
arrange cover prior to the course.
- Date
of most recent sea dive (log book) Due
to Health and Safety requirements, divers
who do not show all paperwork on the day
will not be allowed to dive, so it is
important to make sure that all information
is presented to the Dive Marshal.
Divers
are advised that a 'Seasearch dive' should
not be their first sea dive or deepest dive
of the season. It is recommended that a
UK 'warm-up' dive has already taken place.

If
you have any questions then please do not
hesitate to contact me, for further information
about Seasearch details can be found on
http://www.seasearch.org.uk
Seasearch
Observer Course
This is a one-day course aimed at giving
divers new to the project and new to marine
recording a basic grounding. At the end
of the course you should be able to complete
the Seasearch Observation Form and take
part in Seasearch Dives either on your own,
with your club or on dives organised by
Seasearch Partners.
During the course you'll learn about Seasearch
- its aims, history and achievements, a
basic introduction to the variety of marine
life in UK waters, recognising and classifying
marine habitats, position fixing, and how
to fill in the Observation Form. The day
concludes with a 'video dive' and an opportunity
to fill in a form without even getting wet!
The course includes a splash proof course
pack and everything you'll need to go ahead
and get started.
The tutors are all divers themselves and
drawn from our partner organisations and
keen Seasearchers. A real dive isn't a part
of the course but sometimes one is arranged
locally for you to practice your techniques
with a tutor on hand. During the course
you'll get a Seasearch Qualification booklet.
Once you have completed 5 for real (two
on dives with a Tutor present) you can get
signed up as a Seasearch Observer.
Seasearch
Surveyor Course
The Surveyor Course is aimed at experienced
Seasearch Observers and others with a good
background knowledge of marine life and
marine recording. The aim is to enable you
to complete the Seasearch Survey Form which
is used on most of the expeditionary Seasearch
dives and which gives much more detailed
information for future conservation purposes.
The course lasts two days and includes a
dive on the second day. The Course content
is an expansion of the Observer Course and
covers a much wider range of marine life
and habitat classification. Again we use
video on the first day and you fill in practice
forms both from the video and from the dive
itself. The course is assessed and successful
participants can become Seasearch Surveyors
after completing a further five forms.
Vicky Swales
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| Container
Ship Hits Jackson Reef |
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A
large cargo vessel has gone hard aground on Woodhouse
Reef, in the northern Red Sea.
The 260m-long, Hong Kong-flagged CSCL Hamburg
hit the reef, between the Sinai coast and Tiran
Island, on the morning of New Years Eve,
while en route to Singapore.
Diving
operators and others are relieved that, so far,
there appear to have been no leakages from the
hull.
Damage
is reportedly limited to the bow area, but could
be severe as the ship ran on to the reef at a
speed of about 20 knots. There were no injuries
to crew or loss of cargo.
The
extent of damage to corals has yet to be assessed,
and the diving community waits to learn what impact
the grounding will have on diving in the area,
in terms both of any salvage operation and of
damage done to the reef.
John
Kean, a Sharm El Sheikh-based PADI and TDI diving
instructor and author of the book SS Thistlegorm,
saw events unfold from a dive boat some way off,
before moving in for a closer look.
The
ship passed the first reef, Jackson, at 10am and
instead of continuing past Gordon Reef, the last
of the four reefs in the Tiran Straits, it went
between the middle two reefs, Woodhouse and Thomas,
he told Divernet.
The
gap here is less than 80m. The ship, with a beam
of 32.3m, struck Woodhouse Reef just 50m from
its end but went hard on to the top by a distance
of around 25m.
Kean
later learned that, according to early reports,
the ship deviated when its third officer, temporarily
in charge of the bridge, turned to port to avoid
a small craft.
It
was thought that the officer either over-steered
the vessel or underestimated its ability to turn
back on to a safe course.
The
Straits of Tiran are popular with scuba divers
coming out of Sharm El Sheikh, for the scenic
drift diving that can be had in the vicinities
of Woodhouse, Jackson, Gordon and Thomas Reefs.
Fortunately
no fuel or oil leakages appeared to have occurred,
and that pumps were at work to deal with water
ingress which was limited to the bow area, due
to the ships watertight compartments.
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| Diving
for Crabs & Lobsters |
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New
pages have been added to this web site with reference
to the byelaws governing the landing of fish and
shellfish by divers.
During a recent committee meeting the subject
was discussed at length and it was decided that
it would be helpful if the regulations were published
on the site for the benefit of the membership.
The regulations are enforced and penalties for
breaching the regulations can be severe and include
large fines and/or confiscation of boats.
The new links are as follows:
South Wales Fisheries
Committee Byelaws
South Wales Fisheries
Guidance Leaflet
EU
Minimum Fish Sizes (PDF)
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| Prime
Minister commits to Marine Bill |
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Prime
Minister Gordon Brown has confirmed that the Government
is preparing the long-awaited "Marine Bill"
for introduction early in the fourth Session of
Parliament - possibly within a matter of weeks.
This
follows ongoing campaigning by wildlife organisations
MCS, RSPB, WWF and the Wildlife Trusts, including:
a full page advertisement calling for the Bill
in national newspapers; an "Early Day Motion"
put forward in parliament; and support for the
Marine Bill and Marine Reserves by BBC presenters
Kate Humble and Simon King.
It
also coincided 25 years to the day with the Marine
Conservation Society's inaugural registration
as a UK charity.
The
Marine Bill is vital to enable the designation
of Marine Conservation Zones to protect nationally
important wildlife such as pink sea fans, eel
grass beds, seahorse, maerl and basking sharks.
At present less than 0.001% of our seas are highly
protected from damaging activities.
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| Maldives
adopts blanket shark-fishing ban |
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A
10-year-old moratorium banning shark fishing in
parts of the Maldives has been extended to cover
the whole island group.
Since its adoption in 1998, the moratorium covered
seven atolls - but now it extends to 12 nautical
miles off any Maldives land mass.
The Maldivian Government has taken the step in
the face of evidence that shark populations in
the area have come under threat from fishing practices,
with takes exceeding sharks' abilities to reproduce.
Abdullah Nasir, the Fisheries Ministry's Permanent
Secretary, said: "The fisheries law clearly
tells us that we can protect any marine species
if we feel that it's threatened or endangered
for any reason."
The Maldives is a draw for diving tourists, attracted
by its reputation for healthy populations of sharks,
in particular hammerheads.
Acknowledging that the islands' shark groups are
"very important for tourism", Nasir
added that his ministry was "working towards"
enshrining the moratorium permanently in law,
with the aim of banning shark-fishing and the
export of shark products within the next year.
Conservationists have welcomed the move - but
caution that effects should be monitored. Maldivian
reef ecologist Marie Saleem, while welcoming the
Government's announcement, said that reef shark
populations will require careful assessment to
determine the effect of the moratorium and any
subsequent statutory ban.
Some
observatioins by Rob (Biffo) Bryning of
Maldives Scuba Tours:
We have truly had a great winter season with
superb encounters with all the big stuff.
Its particularly encouraging to see
the numbers of grey reef sharks back on the
increase. We were worried that they had been
all fished out but, for whatever reason, we
are now seeing regular large shoals of these
wonderful animals. |
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| Crayfish
Study |
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| Some
marine related news: |
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The
following snippets are from the Wildlife Trust
marine news section. Some information
about seasearch courses and dives in Wales are
at the end.
- Latest
issue of MPA News, including Skomer, MPAs for
migratory species and more.
click here
- Does
Scotland really need a Marine Act?
click here
-
Scottish consultation on wave and tidal energy.
click here
- Climate
change at the coast CoastNet conference.
click
here
- Bass
Minimum Landing Size petition. The recreational
sea angling lobby has proposed that the Minimum
Landing Size (MLS) for the taking of bass should
be increased to 45cm which is the size at which
each fish will have spawned at least once. The
commercial industry is generally against this
move. Defra had recognized the importance of
increasing the MLS and last year announced an
interim increase to 40cm starting 6th April
2007 with a view to a larger increase in 2010.
A last minute meeting with the commercial sector
has put a hold on any increase. There is a petition
at the No. 10 Downing Street website to increase
the MLS to 45cm.
click
here
- Plans
for Olympic Marina on Dorset coast.
click
here
- Fishing
off Sussex costs a trawler skipper £10,300.
The owner and skipper of the Brixham beam trawler
Angus Rose, was fined a £6,500 with a
further £3,800 costs, by Brighton magistrates
on March 29th after pleading guilty to 17 log
book offences and fishing inside the protected
six mile limit off Hastings.
In an interview submitted to the court, Mr.
George admitted to Marine Fisheries inspectors
that he never filled his log book until the
end of a fishing trip. The rules state that
he is required to do so by midnight every night.
Prosecuting for the Marine Fisheries Agency
and the Sussex Sea Fisheries Committee, David
Buck, said a large vessel like the Angus Rose
fishing inside the six mile limit had a damaging
impact on the marine environment and in-shore
fish stocks.
Magistrates said it was clear that the Angus
Rose had consistently fished within the six
mile limit and there was no excuse for it because
sophisticated equipment on board showed Mr.
George exactly where he was.
Mr. George claimed the log book offences were
minor clerical errors and his encroachment
inside the six mile limit was because he was
short-handed and tired. Magistrates said
that after previous warnings, a small fine and
a conditional discharge in the past it was time
to impose a significant financial penalty.
Paul Johnson, senior MFA fisheries officer based
at Shoreham said: This case shows the
Marine Fisheries Agency and the Sussex Sea Fisheries
Committee working in partnership to enforce
the rules which are designed preserve the inshore
marine environment and fish stocks.
- Latest
issue of emarine. click
here
including PhD on Citizenship and the Marine
Environment.
- Education:
marine mammals and noise. Canadian lesson plan
on the impacts of noise on harbour porpoises.
click
here
- Shark
fishing upsets ecosystem and damages shellfisheries.
click
here
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useful photography web resources: |
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Copyright © 2002 - .... Llantrisant
Sub-Aqua Club. All rights reserved.
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