Talk:Fish ladder

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How effective - where? and which designs?

I was discussing the fish-ladder concept with a construction worker familiar with the local dams (Columbia River system), and he called into question the effectiveness of fish ladders in general. He believed that fish (salmon for instance) can get up the ladders, but that in following instrinct to swim down river to the sea, many or most die. Is this correct? Is another part of the cycle virtually completely missing?

Article needs to address effectiveness - and maybe effectiveness in relation to particular designs and specific dams and rivers. - M.C. — Preceding unsigned comment added by Joel Russ (talk • contribs) 22:54, 17 October 2005 (UTC)[reply]

I'd also like to see effectiveness discussed, so I've added a little section. Hopefully people can add to it. One thing I'd like an expert to weigh in on especially is about the interrelationship with bears. I've heard some conservation professionals say that bears learn to gather around the fish ladders, so I wonder if they are able to predate better from fish ladders than their normal hunting spots (which would be another obstacle for salmon).--Semitones (talk) 20:49, 18 March 2016 (UTC)[reply]

Pictures

This article would be better if the pictures showed fish actually jumping up the ladder.4hodmt 02:38, 20 March 2007 (UTC)[reply]

Diadromous only ?

Fish ladders exist to facilitate migration. Some fish migrate within sweet water and have a need for fish ladders. The current definition is consequently wrong. Thanks, GerardM (talk) 12:34, 8 December 2008 (UTC)[reply]

Paddlefish

Hi Androstachys. Can you please cite the information you added to paddlefish and fish ladder concerning the influence of metal in concrete ladders? What you say sounds plausible, and there are references on the web to paddlefish having difficulties negotiating ladders. But I cannot find a source concerning metal in concrete.. --Epipelagic (talk) 10:22, 6 January 2011 (UTC)[reply]

Hi Epipelagic, The information was from a National Geographic documentary on American paddlefish, featuring Zeb Hogan. Androstachys (talk) 13:09, 6 January 2011 (UTC)[reply]

Countries

I have added back in 'Canada' after New Brunswick, and 'United States' after Rhode Island. This is an international encyclpoaedia, and if you are going to assume that people don't know where County Sligo is, and so put Ireland, you must also accept that people don't know where NB and RI are. I had to look NB up - I didn't know where it is. The North American assumption that their countries don't need to be given as they are the 'default setting' is unacceptable in an international encyclopaedia. 81.147.147.114 (talk) 12:26, 13 February 2011 (UTC)[reply]

The photo gallery at the end of the article does the same thing - no country specified for N American excamples, but country specified for elsewhere. I have added the N American countries.

For the captions within the text, I tried a diffeent tack. All the N American ones had no country given, so I removed the country from the caption of the lone non-N American example. Can you understand how frustrating this is for non-US readers? Canada and the US are not special cases. 81.147.147.114 (talk) 12:33, 13 February 2011 (UTC)[reply]

Fish ladders are also around natural barriers

In the beginning of the article fish ladder is defined as a pass for fish around an artificial barrier, that is far to restrictive as there have been quite a few fish ladders around or through natural barriers to extend the range of the fish in that river. There is quoted an example of that early in the article the Ballisodare Fish Pass. Another example I know about is in the river Þjórsá in Iceland. The fish ladder allows salmon up above the falls of Búðafoss. Only in Iceland I could give about ten examples without trying to look for more.Jochum (talk) 11:09, 31 March 2014 (UTC)[reply]

External links modified

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The unknown agenda of the person who claimed known science is dubious

It is a well known and not all dubious fact that paddlefish react to metal. Whichever {removed} who claimed the rebar thing is dubious needs to learn how to use google before casting doubt on established facts because their laziness made the article worse. Don't edit stuff as dubious just because you are ignorant. literally a first page top of the page search result: https://academic.oup.com/bioscience/article/57/5/399/221708 — Preceding unsigned comment added by 2601:742:8102:1180:48a:b8d3:e7e8:b25 (talk) 11:57, 31 October 2021 (UTC)[reply]

History of Modern fish ladder designs on large dams

I believed this should be added to the history of Fish Ladders, and to the Damns built along the Columbia River Basin until he retired in 1971.

Phil Lane Sr. worked on the McNary Dam, erected on the Columbia River Basin in 1954. He worked with the US ACE from 1950 through 1971, asked the US Army Corps of Engineers, "how are the fish were supposed to jump over" the dam. He was concerned about the migration of fish to the upper reaches of the basin. He was a member of the Yankton Sioux Tribe, born on the Standing Rock Reservation on January 11, 1915. Personal conversations I had with him at Oregon State University American Indian Science and Engineer Society (AISES) student chapter. He said he really had to argue his case, and come up with a workable design. This information is available on https://www.fwii.net/m/blogpost?id=2429082%3ABlogPost%3A53585 , The Four Worlds International Institute, an obituary and life history of the man. titled Remembering Mato Gi (Brown Bear) Phil Lane Sr. Who Passed To The Other Side Camp More Than 15 years ago, by Phil Lane Jr. 2 October 2019.

He is the first Native American to Grtaduate with a BS degree west of the Mississippi in 1941 with a degree in Forestry. However, it was his time with the US Navy and the US Army Corps of Engineers that brought him to building dams along the columbia river basin. Storm Brise (talk) 10:19, 22 September 2023 (UTC)[reply]