David Fenwick Snr Does anyone know what has caused this on Necora puber? It was affecting carapace and both claws.
David Fenwick Snr Hi Dawn, just found a paper on diseases of C. pagurus and thought it might give me a bit of an insight. Heavy reading for the time of night but it would seem a lot of pathogens cause disease in crabs. Have e-mailed the author of the paper sending him a series of images of the Necora. Will report back with any response. http://icesjms.oxfordjournals.org/content/65/9/1578.full
David Fenwick Snr Dear Dave,
What you have here is essentially a manifestation of shell erosion, with
the black lesion being a host response to the exposed lesion. This can
happen for a variety of reasons, including mechanical damage (fighting, exposed shores etc) and also due to pathogens. The point really relates to the frequency at which such lesions are recorded. If they are simply incidental (e.g. 1/500) then we put them down to natural occurrence. If frequencies become much high (e.g. >1/10) AND lesions are associated with certain sites, there is more likelihood for some underlying cause which is affecting a population. These are the general rules when considering whether further investigations (e.g. by Cefas) would be necessary. I hope that this helps.
Regards
Dr Grant D Stentiford
David Fenwick Snr I will thank Grant for his reply.
Stuart Pearce Up close with the Velvet Swimming Crab (Necora puber), out of the water, one of my little angry friends from Bangor University, Wales 2002.
Marie-therese Bertin ta de beaux yeux lol!!!
Michael Sterken truly looks alien. Wonderful shot!
Stuart Pearce Thanks Marie-therese & Michael :)
Reha Dolphin I can't figure out what exactly the creature if you didn't mentioned here it is a crab..
Stuart Pearce Not as aggressive as the Velvet Swimming Crab (Necora puber) we get in the UK, but this little swimmer certainly had some attitude LOL...
Olu Deniz Lagoon, Turkey 2013.
Andy Horton 4 June 2012
A rockpooling visit to Worthing Pier on a low (0.4 metres) spring tide produced a surprise Brittlestar as well as some infrequent summer occurences like two large Velvet Swimming Crabs, Necora puber, a handful of small Common Hermit Crabs, Pagurus bernhardus, in winkle shells, a single Common Starfish Asterias rubens, one Dahlia Anemone, Urticina felina, one small Long-legged Spider Crab Macropodia rostrata, and one sub-adult 5-Bearded Rockling, Ciliata mustela. A Greater Pipefish, Syngnathus acus, was rescued from the beak of a Herring Gull. Daisy Anemones, Cereus pedunculatus, were frequently found in chocolate brown hues. Snakelocks Anemones, Anemonia viridis, were common as usual with frequent Beadlet Anemones Actinia equina.
Full Rockpooling Report http://www.glaucus.org.uk/LancingBeach2008.htm#4June
(This came out like a list: I must be a bit tired.)
David Hill David Hill Andy - went on a Bioblitz on Saturday at Cemlyn Bay (north coast of Anglesey) and today rockpooling at Llanddulas (north Wales coast) - lots of interesting new finds (for me anyway, fairly new to marine life).
Cemlyn included Eel, 5-Bearded Rockling, Butterfish, Lobster and Great Scallop - a few pics here www.flickr.com/photos/natureseye/sets/72157630042354134/ and list of species here http://www.cofnod.org.uk/BioBlitz?ID=6
At Llanddullas this afternoon lots of Sea Gooseberries and a few Pipefish, pics to follow.
Andy Horton The Greater Pipefish did not look injured when collected, but I do not think it will survive. The gulls catch these pipefish occasionally and drop them in gardens.
Joe Bater that would have been a great UW macro photography day!
Andy Horton Not so good on the photography front. Pier causes shadows and low light. Capture and return. I hope to get a few shots later. I was terrestrial and the critters were under rocks. More though. The young rockpoolers (8 yo) are well informed now.
David Hill http://www.flickr.com/photos/natureseye/7340913120/
Andy Horton 20 March 2011
In the early evening, I recorded by first wild fish of the year a 5-Bearded Rockling, Ciliata mustela, on the kelp-covered shore by Brooklands (west Lancing, west of the pipeline) plus my first crab, a very small Velvet Swimming Crab, Necora puber.
http://www.glaucus.org.uk/Coastal2011.htm#Ciliata
Andy Horton 20 March 2011
In the early evening, I recorded by first wild fish of the year a 5-Bearded Rockling, Ciliata mustela, on the kelp-covered shore by Brooklands (west Lancing, west of the pipeline) plus my first crab, a very small Velvet Swimming Crab, Necora puber.
Stuart Pearce Another shot from the Tobago fieldtrip in 2006....
Ernst Andres YESSSSS <3
Stuart Pearce Thanks Ernst :)
Ernst Andres You´re welcome my friend :-)
Cameron Easton Just trying to work out when my daughter was doing her Tobago field trip. It was about then - but she was with the Old University ... Glasgow. Were you connected with our august institution Stuart - you must have been given your involvement with Millport. (I'm a Glasgow lad - BSc PhD and ongoing teaching/research for the last 30 odd years!) I feel a connection!
Shohei Shigeta Wow.
Stuart Pearce Thank you Shohei :)
Stuart Pearce Hi Cameron, no connection to Glasgow unfortunately, all linked to Hull University, we done a trip to Tobago every year because the main place there is called Scarborough, same as where our campus was based. Millport, like most UK universities we went every year, I went as an undergrad, then a further 3 times as teaching/research whilst doing my PhD. Also done 2 yrs at Bangor University in molecular biology (M.Phil), innate immunity research on Carcinus maenas & Necora puber. How is your daughter doing now, still following in the family footsteps? :)