Talk:Antarctic krill

Template:Fac after much discussion I want to re-enter this article. All objections and suggestions and language (http://en.wikipedia.org/wiki/Wikipedia:Featured_article_candidates/Antarctic_krill) have been worked on, references added, some images moved to other places. An academic group from Australia, USA, Germany, Japan and Norway found no errors. Thanks go especially to user:lupo, User:Yakuzai and in Scandinavia to User:Salleman. The article covers the basic biology, ecology, geography, fisheries and some unique bio-features of this key species of Antarctica, which is probably (in terms of biomass) the most successfull animal of the planet, and gives an outlook for future ventures of Ocean Engineering. Uwe Kils Missing image
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21:57, Jun 20, 2005 (UTC)

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Contents

1 POV? 2 Vote: move 3 Hard to understand 4 The filter-feeding movie 5 The eye 6 Small points 7 thank you everybody 8 Vertical migration 9 The MarineBio page 10 Things to move over to krill 11 image request 12 response from London 12.1 Hello Kils 12.2 Biomass

POV?

Is the statement

In the North Atlantic, Meganyctiphanes norvegica and in the Pacific, Euphausia pacifica are important krill species.

specifically the word "important", not POV? -- Timwi 15:34, 15 Feb 2004 (UTC)

Vote: move

This page is de facto about Antarctic Krill rather than krill in general. I updated the intro paragraph, but I propose to move this article to Antarctic krill and have krill redirect to either Euphausiid or krill (disambiguation). Quick vote:

• Yes, move the page. One-dimensional Tangent (Talk) 01:54, 20 May 2005 (UTC)
• Yes, but move it to Antarctic Krill (note capitalization). - UtherSRG 03:04, May 20, 2005 (UTC)
• Move to Antarctic K/krill, and move Krill (disambiguation to Krill. sjorford →•← 11:48, 21 May 2005 (UTC)

Hard to understand

Really like what you have done with the article, i think it could be really good but i have difficulty understanding some of it. As a native English speaker i found some of the grammar quite poor which made some of the content unintelligable. Also the choice and the way you word the sentences has made it difficult for me to understand what is being conveyed. I have made some minor edits to some of the wording but i still think it needs a bit of work. Again i think this is a good article but with better elucidation and grammar it could be a fantastic article. Yakuzai 21:14, 12 Jun 2005 (UTC)

hallo Yakuzai! thank you for your comment. Please help us and change bad language. I am German and know my English is rotten - take care Uwe Kils 21:20, Jun 12, 2005 (UTC)

Hi Kils. Have read through your article more thoroughly and have done some further editing. Will go through it systematically over the next week or two, really want this to be a featured article! Here are some initial thoughts on the introduction:

1. The bit about the step between prey and predator is hard to understand maybe you could write this up more thouroughly in the ecosystem section and erase it from introduction.

2. In the section Systematic are you trying to give an account of what distinguishes the Antartic Krill from others of the same order? If so i Think you need to state that and also have a link for the meaning of carapax and gnathapod. Peolple who don't have knowledge of technical terms like these will find it hard to understand this section. I made an edit of this section myself but i need to clarify whether you are trying to say that the visibility of the gills is due to the thoracomers on each side of the carapax being so short? Also whether the visibility of the gills is another distinguishing feature of this order? updated by 193.115.13.66 12:01, 13 Jun 2005 (UTC)

Hopefully this is helpful for you. Yakuzai 22:45, 12 Jun 2005 (UTC)

thank you, Yakuzai, I will work on it Uwe Kils 23:27, Jun 12, 2005 (UTC)

The article needs to be restructured. I suggest reducing the number of top-level sections by grouping most of current sections under "Biology" and "Ecology". I believe the re-sorting would also make the text flow more naturally. Another thing, which would be helpful for editors and readers alike, would be short explanations of specialized terms in ()'s, when those are first used (especially for those that are now red links). Zocky 20:51, 13 Jun 2005 (UTC)

The filter-feeding movie

I've gone ahead and implemented my own suggestion: replacing the movie with a still image plus a link to the full movie. I hope you can live with that, but having the full animation inline made editing very tedious for me due to the long load time, and I also find animations distracting when I want to read the text.

The caption says "slow motion" at 300 frames/sec. The GIF contains 10 frames, each displaying for 40 ms. That is, it replays 25 frames/sec. Why not say "slowed down by a factor of 12"? Lupo 14:39, 14 Jun 2005 (UTC)

The eye

Some ideas on how to expand that section: How large is the eye? What's the size of the individual components (or whatever they're called)? How many of them are there? Is its light sensitivity known? Do rely krill on their vision much?`Is that known at all? or do they start their escape reaction based on sensing changes in the microcurrents around them? Lupo 15:48, 14 Jun 2005 (UTC)

Small points

Just a few small points that are causing me a few problems when i read this article, they are,

1: the prose in the section "Position in Antartic Ecosystem" is quite awkward, i think maybe this could be worded better and grammar improved.

2: The overall feel that the article sometimes reads as though it is about Krill in general as oppose to Antartic Krill specifically.

3: I am in agreement with Lupo that the section on the compound eye should be expanded, as at the moment it just seems like an after thought that has been tagged on to fill up space.

Other than that i think evereyone involved has done a fantastic job! Yakuzai 21:33, 14 Jun 2005 (UTC)

thank you everybody

I would like to express my thanks to everybody helping in the nomination. I think 3 1/2 supports and a long long discussion are an unexpected and great outcome for a critter so remote and unknown - you should see how little and poor Antarctic krill is represented in Encarta and Britannica - this is the best reviewed and resourced general article of krill we know of - it is impossible to fullfill all wishes at the same time - this is what we did with our all product peer review stamp (http://en.wikipedia.org/w/index.php?title=Antarctic_krill&oldid=15197713) to qualify this stage of the article for academic exercises, especially for our dreams of a Virtual university within Wikiversity - good luck to you all Uwe Kils 21:48, Jun 14, 2005 (UTC)

Vertical migration

Northern krill seems to move down during the day and up again at night (see [1] (http://www.le.ac.uk/biology/gat/krill.html)). Is this a behavior common to all krill? If yes, I think this should be added to the article on krill in general. (That article, BTW, needs expansion!) In no, does the Antarctic krill also show this behavior? If so, what is known about the causes? Is it just that their food sinks and rises, or are there other factors? Lupo 07:27, 15 Jun 2005 (UTC)

yes, they also do that Uwe Kils 12:12, Jun 15, 2005 (UTC)

The MarineBio page

at [2] (http://www.marinebio.com/species.asp?id=518) looks like a good source. Has a description that is probably more accessible to laypeople, and some facts we might add. Three points:

good idea to do that Uwe Kils 12:12, Jun 15, 2005 (UTC)

• The image they have seems to be essentially the same as our top image. Theirs looks a bit sharper; did they post-process it? Also, they say © Alfred Wegener Institute for Polar and Marine Research!

I gave them the image for their sci and edu collection, not the copyright (I worked there as a Heisenberg Fellow for a while). If people ask the AWI for the krill image they charge high royalties (and the new administration about always forgets to share them with me), at Wikipedia everybody gets it free since 16:58, Apr 1, 2003. I took this quantitative sci picture long before the AWI was founded. You can contact Gotthilf Hempel about the copyright or visit (http://maps.google.com/maps?ll=39.48080778121948,-74.5048463344574&spn=0.0054931640625,0.00685572624206543&t=k&hl=en) me and I show you my original 60 mm film (I pick you up at the airport, than we can talk wiki). This picture and the revenue from it and the Maier Leinitz Prize upon it helped raise the political motion for hatching the AWI and instrumentation for the in situ images and videos (developed at the ATOLL laboratory). We are the only ones in the world with such high res in situ material, invited all over the world to talk about it. The high resolution image you can view via my ecoSCOPE.com (http://www.ecoscope.com//krill/krill6/index.htm) server. This image was the first critter on the web ever, hatching from the first NeXT in Kiel University.

Hey, I wasn't questioning your copyright. I rather had the impression that their attribution was wrong! Lupo 13:09, 15 Jun 2005 (UTC)

I ask them occasionaly to take the C sign out of the image (some overeager administrator put it there) and link the image to the virtual microscope, but they are slow (and in the small group of Antarctic scientists all over the world we are all friends) - and who cares?

• They say swarms can be as dense as 10,000 individuals per m³; our article claims 20,000. Which number is correct, and what's the source for our number?

lets write 10 000 to 30 000 - there is a lot of discussion and just about no knowledge about the issue, that is not so easy to measure Uwe Kils 12:12, Jun 15, 2005 (UTC)

• They say that Poland and Ukraine are active in krill fishery, too.

would be nice if you would add itUwe Kils 12:12, Jun 15, 2005 (UTC)

Lupo 08:17, 15 Jun 2005 (UTC)

Things to move over to krill

I agree with Yakuzai that some sections are probably better moved over to krill. In particular, I have the impression that the "Fisheries" and "Future visions of ocean engineering" sections should go there. Lupo 08:44, 15 Jun 2005 (UTC)

no, this is only about E. superba Uwe Kils 12:12, Jun 15, 2005 (UTC)

image request

As requested I uploaded a translated graph Image:Krillanatomykils.jpg (by Kils & Klages)

Missing image
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(It was available as gfdl all the time on the wikisource links, where i put some of our publications with full res images, just click on the names in the refs - nobody aparently noticed that (thats the way we work: short articles with lots of attached original material for in depth readings) Uwe Kils 12:12, Jun 15, 2005 (UTC)

Thanks a lot! (Hmmm... I had been visiting the Wikisource pages, but also the pages on your own site. Must have missed that one.) Lupo 13:12, 15 Jun 2005 (UTC)

Very intelligable. Nicely done! El_C

response from London

Uwe wants to share this with you (from his talk page):

Hello Kils

Just would like to state that i have very much enjoyed being involved in a project of this nature. To see the speed of co-operation between various people was (Uwe, Lupo and Salleman and all others) fantastic. It was a complete buzz to go off researching about a scientific subject and coming to some understanding and appreciation of a creature that i would have no knowledge or interest in otherwise. I would like to say that it takes a damn good teacher to get others interested in what they teach and i for one, if only in a rudimentary and general way have found the subject of Krill and sorrounding issues of ecology and environment fascinating. I think that says a lot about your willingness to let others participate in something which you obviously have great knowledge in and could easily have been a lot less humble with. At some point i will put up some informtion on my home page so at least people know a little more about me. Am going to try to extend the article on Ice-algae so any info you may have would be good. I hope the article on Antartic Krill gets featured as i think it is now very good.

Wikiversity sounds like a good idea but will need more time to go through the proposal (not too sure what help i could be).

Once again thanks Uwe! Yakuzai 22:50, 20 Jun 2005 (UTC)

that feels good

Uwe Kils Missing image
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03:25, Jun 21, 2005 (UTC)

Biomass

Just looked over the expanded biomass section and have made some edits but their are a few sentences that i think need clarifying.

"The total non-krill yield from all world fisheries is about 100 million tonnes per year whilst estimates of annual Antarctic krill production are between 13 million to several billion tonnes per year".

1. By "Antarctic Krill production" do you mean the annual yield of antarctic krill from fisheries?

no, it is the growth of biomass over a year - amazingly high, isn't it - what I read over my life about krill and our in situ imaging of schools my personal oppinion is that the biomass numbers are even an underestimation. Uwe Kils Missing image
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20:10, Jun 21, 2005 (UTC)

If this is not the case then is the above comparison valid?

2. "Several billion tonnes per year" would seem to contradict the opening paragraph's claim of a total biomass of 500 million tonnes.

"Thus primary production falls within 1 -2 g carbon per square meter, this however is not a very high concentration if compared to the 30 - 50 g carbon per square meter close to the ice. but the area is just enormous, and in the summer there are many hours of daylight".

3. I think these last few sentences need work, wish i could be more specific.

Yakuzai 19:32, 21 Jun 2005 (UTC)