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1972
Feb 6, 2013 9:46:52 GMT -8
Post by treculi on Feb 6, 2013 9:46:52 GMT -8
John, This is a photo of a Cardinal shiner Luxilus cardinalis from the Kings River in Arkansas. The red is above the black stripe. Also notice the tubercles on the nose. Tubercles develop on a number of breeding males of different species. I think that may what is on the nose of the redside shiners. Next time you out in the field see if you can collect a breeding male and look at the nose under magnification. Attachments:
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1972
Feb 6, 2013 11:17:34 GMT -8
Post by SeaRat on Feb 6, 2013 11:17:34 GMT -8
treculi,
I see that on the second picture I posted, the tubercles look on that photo like distinct white dots. This is very interesting, and I will try to collect a few this spring when they come up into the Clackamas River to spawn.
Your posts read like you have a background in fisheries/zoology. Thank you for the input.
I have been calling myself an "underwater naturalist" as I have a zoology degree from Oregon State University, but was not able to gain a full-time staff position in zoology or fisheries. So I went on to work in safety and industrial hygiene, but kept my river observations going. I was in Roseburg observing the North Umpqua River for over 18 years. Now, I'm in the Portland, Oregon area, and have a favorite dive spot at High Rocks on the Clackamas River.
I have this photo of a Northern Pikeminnow from the Clackamas River, which as you can see is different from the Umpqua subspecies. This fish posed for my because it was hooked and hung up on a branch. I took the photo, then cut the fishing line.
John
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1972
Feb 6, 2013 13:37:02 GMT -8
Post by SeaRat on Feb 6, 2013 13:37:02 GMT -8
Well, I lost the photo in the last reply (too big). So here it is.
John
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1972
Feb 6, 2013 16:09:47 GMT -8
Post by treculi on Feb 6, 2013 16:09:47 GMT -8
I am not sure but one other thing you might look for this spring in the redside is if the nose is changing color. It may only change when they are actively spawning.
Great photo of the northern pikeminnow you can really see identifying characteristics. I think it is also great you did 18 years of observation in one location. That type of fieldwork seems to be rapidly fading. Everything seems to going to DNA research. There are cases of fish being named after researchers that have never seen the habitat the fish lives in or what its’ life history is or where to find it in the habitat.
Like you I pretty much classify myself as an underwater naturalist. The short version is I got a BS degree in biology, ended up working in construction, decided to get out of that and did freelance photography including a couple of ongoing assignments for two state fishes of books which have been put on hold for years due to lack of funding. The fisheries jargon comes both from my own interest and working with ichthyologists. The full version would take a while to write.
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1972
Feb 6, 2013 19:59:40 GMT -8
Post by treculi on Feb 6, 2013 19:59:40 GMT -8
This slide reminded me of the buoyancy of the Sekonic light meter in a case. I dug mine out and it is still accurate. Like the Nikonos II there were no batteries to worry about. There sure seemed to be a lot of floating items tied to lines during this time. Attachments:
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1972
Feb 8, 2013 14:00:35 GMT -8
Post by SeaRat on Feb 8, 2013 14:00:35 GMT -8
treculi, I made a slight error in naming the Umpqua Northern Pikeminnow. It is actually a distinct species of Ptychocheilus[/B], known as Ptychocheilus umpquae[/B]. This comes from my book by J.B. Scott and E.J. Crossman titled Freshwater Fishes of Canada, Bulletin 184[/B], Fisheries Research Board of Canada, Ottawa 1973, pages 487-490, the entry titled "NORTHERN SQUAWFISH, Ptychocheilus oregonesis[/B] (Richardson). Photo Copyright John C. Ratliff, 2013 That's what happens when you spend 10 or so years away from the subject. The photo shows the Umpqua Northern Pikeminnow on the prowl, trying to get a tasty bite of Redside Shiners, but not successfully (I have a successful photo too). I checked my original slides, and I do have a slide which shows the mating behavior of the Redside Shiner. I'll have to scan it sometime. John
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1972
Feb 8, 2013 14:17:09 GMT -8
Post by SeaRat on Feb 8, 2013 14:17:09 GMT -8
triculi, You may remember this light meter I have on my Nikonos II underwater camera. This photo was taken off the video that Sid Macken made of me diving with him in Big Cliff Reservoir last summer. This is the camera which leaked a few drops of water, but I was able to save most of the photos. Note that I am wearing the SeawiscopeEY on my mask. That may look weird, but it allows very close-up observation of tiny aquatic life. I met the inventor, a very nice diver named C.Y. Tang from Hong Kong who was the head of the university teaching optometrists in Hong Kong. scuba-vision.com/fsey.htmlJohn
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1972
Feb 8, 2013 17:54:56 GMT -8
Post by treculi on Feb 8, 2013 17:54:56 GMT -8
Yes I do remember the Sekonic Marine Meter I have a red one. Did they make different colors in different years? Sid’s video looks like it takes great stills. I have not heard of the SeawiscopeEY. I could use one these days I wouldn’t care how goofy they look I’m sure the fish don’t care. I tried adapting magnifiers to use underwater without any success. I noticed in their ad they do not work out of water probably the same reason terrestrial magnifiers do not work underwater. It looks like they would be great when shooting macro. It is surprising what shows up in an image that you did not see when taking the photo.
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1972
Feb 8, 2013 18:16:55 GMT -8
Post by SeaRat on Feb 8, 2013 18:16:55 GMT -8
treculi, Actually, the SeawiscopeEY does work out-of-water, but only if you put the object about an inch or two from the lens, and the lens is close to your eye. There is a different focal length through water than through air. Therefore, as a practical means it is magnifying too greatly out-of-water. Last year I was able to watch two lampreys fight over a third female lamprey and mate at about a foot distance from them. I described in here, in the General Discussion section. vintagescuba.proboards.com/index.cgi?action=display&board=general&thread=2553&page=1I tried to come back a few days later with my Canon F-1N and the case/strobe, but because of the current I could not get into the same area where I had observed the lampreys. By the time I had another opportunity a week or so later, the river was slower, but the spawning activity of the lampreys was finished. All I found were dead, spawned-out eels. The Redside Shiners had not gotten their spawning colors either (and they did not last year!). So it was a very interesting time, and the SeawiscopeEY was very, very helpful in seeing and observing those lampreys. Concerning the color of the Sekonic Marine Meter, I think you are seeing the blue Oceanic aluminum bracket for it that attached it to my Nikonos II/Subsea mounting brackets. John
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1972
Feb 8, 2013 19:44:29 GMT -8
Post by treculi on Feb 8, 2013 19:44:29 GMT -8
I did notice the bracket. Here is a photo of mine. Attachments:
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1972
Feb 8, 2013 19:48:32 GMT -8
Post by treculi on Feb 8, 2013 19:48:32 GMT -8
Here is the face. Attachments:
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1972
Feb 8, 2013 20:08:53 GMT -8
Post by treculi on Feb 8, 2013 20:08:53 GMT -8
I looked around and found a couple of versions of the Sekonic Marine Meter. It looks like the red one is the Marine Meter, the off white is the Marine Meter II and there is a black version Sekonic made for Dacor.
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1972
Feb 8, 2013 20:12:37 GMT -8
Post by SeaRat on Feb 8, 2013 20:12:37 GMT -8
tricula,
That's very interesting; mine is a "Sekonic Marine Meter II[/B], and it has an orange on/off switch. Mine is the off-white (kinda "cream" color). The number on mine is "No. 852744."
John
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1972
Feb 8, 2013 20:43:47 GMT -8
Post by treculi on Feb 8, 2013 20:43:47 GMT -8
I never paid much attention to them until I noticed your photo. The number on mine is 413326. It is still in working order.
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1972
Feb 9, 2013 19:08:39 GMT -8
Post by SeaRat on Feb 9, 2013 19:08:39 GMT -8
Those Sekonic light meters are really great, and almost indestructible. I've had mine for about thirty years now, and it provided spot-on readings in Big Cliff Reservoir.
I'm sitting here in Oregon waiting...for the seasons to change so that I can get back into the water and enjoy the river.
John
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