Talk:Crayfish

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Why the removal of the trivia section. The image on Link's shirt is in fact a crawfish, as it is referenced as one in the game itself... it shouldn't have been changed to lobster... and thus leading it to be deleted.

Sorry, my change was only "spelling". My copy/paste got confused, so my earlier edit summary is incorrect.Lisa Paul 22:29, 28 Jun 2004 (UTC)

Any idea why this page is marked (though not actually listed) for cleanup? Looks pretty good to me. -- Juhaz 18:48, Jul 30, 2004 (UTC)

What exactly are we looking for? LIke crayfish as pets.....anatomy? Crawldaddy888 20:25, Oct 7, 2004 (UTC)


Apologies to whoever will fix this, but I couldn't figure out what else to do. I found this deadend article — it's very long — which looks like something out of a 19c textbook, the language of it too old I think to be a copyvio, the subject of it, as far as I could tell, not likely to be a spoof so not a candidate for Vfd. The best thing I could think of was to dump it here in the hopes that a crayfish expert could decide what to do with it. — Bill 21:08, 19 Oct 2004 (UTC)

Contents

[edit] 100-year-old 'monster' cray emerges from NZ deep

September 27, 2003 When New Zealand recreational fisherman Brian Hoult felt something on the end of his line, the last thing he expected to haul in was a 100-year-old "monster". Particularly when he was fishing for snapper. But somehow he ended up with a 1.34m long crayfish weighing 6.3kg on the end of his line. The monster is now in a holding tank where it will be kept until it sheds its shell. Mr Hoult intends to keep the shell, and put the cray back in the water, where it will grow a new shell. Mr Hoult had only been fishing for 10 to 15 minutes on Saturday before the crayfish attached itself to a whole calamari bait. "It felt a bit like a gumboot and didn't fight at all as I reeled it in," Mr Hoult said. The cray was not hooked up and had just held onto the bait and wouldn't let go as Mr Hoult reeled in 32m of line. A net was used to make sure the cray did not let go of the line as it reached the surface. Mr Hoult has given the cray to former NZ Museum of Fishes curator George Campbell to look after until it sheds its shell. Mr Campbell said the cray was a female packhorse crayfish and was possibly 100 years old. "This is one of the largest caught in recent years and, for today's standards, it is a monster," Mr Campbell said. The cray could grow up to 16kg, he said. "It is possibly too big to go into the funnel of cray pots and in too deep a water for divers," Mr Campbell said. This story was found at: http://www.smh.com.au/articles/2003/09/26/1064083194212.html

[edit] Potentital for expanding the article

I have just removed the {{expand}} tag from this article. Since there was no indication as to what needed expanding (diet? taxonomy? economic importance?), it is not helpful to have it there. Feel free to replace it, anyone, if you have specific ideas as to how the article should be expanded. --Stemonitis 07:46, 26 Apr 2005 (UTC)

Quite right. We need an article on the Red Swamp Crawfish (Procambarus clarkii, with a redirect from Red Swamp Crayfish), a major farmed species of crayfish. According to the FAO, some 34,000 tonnes were produced in 2003. The detailed FAO FIGIS statistics reveal that almost all of that was produced in the U.S., which is and has been for decades the major producer. There would need to be a sister article on Crayfish farming. Diseases of crayfish could be discussed. (We'd need to find out what caused the dip in production in the year 2000. Diseases?) In Europe, it seems that most crayfish are caught, not farmed. The FIGIS aquaculture statistics reports only some 20 to 30 tonnes in 2003... (would have to check the FIGIS capture databases, though). P. clarkii in particular is also a highly invasive species and is, as an exotic species, often considered a pest. I know that North-American crayfish escaped from small-scale farms or aquariums cause problems in Europe. This article could do with at least some mention of such things. Then there would need to be stubs for the families and genera, e.g. Cambaridae. Ideally, one would be able to naviagte through the taxonomic hierarchy down to P. clarkii. Oh, and before you ask me to do all this: I'm still busy writing up these farming issues we recently discussed. Turns out that there's enough material there for two brand-new articles, so I'll be occupied for quite a while! Lupo 28 June 2005 12:26 (UTC)
I have plans (not immediate) to write a bit about P. clarkii's role as a non native, invasive in Southern California. I was involved in a research project attempting to ascertain the effect of P. clarkii on three amphibian species, though we collected data on micro inverts as well. I need to research a bit about the history of their introduction to S. California though, and find time in my schedule. Shawn M. O'Hare 16:57, 26 November 2005 (UTC)
n.b. I have just created the article Procambarus clarkii (with redirects from a great many potential common names). Please feel free to add/amend at will. --Stemonitis 16:37, 24 December 2005 (UTC)

[edit] Intro

I did not feel fully justified in wantonly editing, so post here. I have some objection to the statement made in the intro about the crayfish living in unpolluted waters. P. clarkii in Southern California routinely live in waters that are heavily polluted, at least to the degree that more sensitive species no longer exist (such as amphibians). In fact some streams I have personally surveyed will contain crayfish, algae, and little else. There is a marked difference though between crayfish in streams close to urban development and streams that are more removed from civilization. In both cases you might find few micro invertebrates, almost no amphibians, but in the more polluted stream the crayfish are extremely sluggish, almost as if drunk. They are much less aggresive. Shawn M. O'Hare 17:05, 26 November 2005 (UTC)

[edit] Suggestions for more info

  • I'd like to see more information added on the classification, evolutionary relationships, and fossil record of crayfish. MrDarwin 19:26, 12 January 2006 (UTC)
    • I just read 100 science facts which noted that crayfish have two hundred chromosomes. I think some summary about the rammifications of this trait as compared to say a species with a mere forty six. 06:12, 21 April 2006 (UTC)
  • Crayfish anatomy is not covered at all. Like, tail fan, sensory hair... See my recent Lateral giant neuron; an interesting fact, but redlinked. mikka (t) 23:30, 9 February 2006 (UTC)
    • Crayfish anatomy is covered at decapod anatomy. At the moment, it only covers external anatomy, and not in much detail, but it is there. It would be wasteful to repeat anatomical information at every article, which is why I tried to centralise it at decapod anatomy. I have now added the term tail fan to it, but have made no reference to sensory hairs or giant lateral neurones. Please feel free to expand it. Anatomy unique to crayfish belongs at crayfish, of course, but since crayfish are pretty plesiomorphic in terms of gross anatomy, decapod anatomy is a reasonable place for discussions of more general crayfish anatomy. --Stemonitis 08:06, 10 February 2006 (UTC)
      • There are two problems with the article decapod anatomy: first, how an ignorant like me would know that I have to read Decapod anatomy and not, say Malacostraca anatomy. Second, no one suggests to "repeat". A common wikipedia tradition is to provide summaries of basic subtopics (Haven't you notice "Main article: Blablabla" after secton titles in longer aticles?). Currently even a "see also" link from "crayfish" to its anatomy is absent. mikka (t) 08:44, 10 February 2006 (UTC)

[edit] Bias

Apart from US bias, is there anything to support: Crayfish are eaten in Europe and China, but they are perhaps most popular in Louisiana, where the standard culinary term is crawfish. ? --BarryNorton 18:58, 7 March 2006 (UTC)

[edit] Life on land?

Last night, I saw a crayfish walking down the street in front of my house (I live in Austin, TX.) There aren't any rivers, lakes or creeks very close, and it wasn't raining yesterday, though we've had a reasonable amount of rain in the last few days.

In any event, I was hoping to find some comments about where crayfish can live -- I was really surprised to find one just walking down the street like it was no big deal -- but the article doesn't talk about that, beyond a comment about how they can live underground. Procambarus clarkii says that this species can tolerate dry spells, so perhaps that's what it means -- they can live on land. dougmc 18:45, 21 June 2006 (UTC)

I am wondering that the street-walking crayfish you saw might have lived in the sewerage or come with the flood water. --Purpledragonfly 04:19, 25 June 2006 (UTC)

Crawfish will live just about anywhere there is water including drainage ditches. Is there any wastewater ditches in your vicinity? --jacksjb

[edit] Astacus fluviatilis

Why do Astacus fluviatilis redirect to this article? It has been removed from the Astacus article (see the early history of that article, when I created it). Why? Kricke 20:48, 21 August 2006 (UTC)

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