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Hello Koi Enthusiasts!

This blog is here to provide a spot for various things that do or might pertain to Koi. This stuff is intended for your entertainment, and is not meant to meet the stricter standards of our ebooks and courses, so use this info carefully and at your own risk. The short articles here may be descriptions of techniques that have proved effective, an introduction to new fish research, facts, graphs or just something FUN about fish! This information can be a springboard for your imagination and an entertaining place to learn something new. Information that was first published in Question of the Week can be found here.

The more we learn about Koi, the more FUN this hobby is - and we always say - if you're not havin' FUN, you're not doin' it right!

This article is a continuation of what we've learned about fish intellegence.  Turns out that learning how to motivate and stimulate fish could be the key to their very survival in the wild!  The parallels for our Koi are clear...


While proponents of the primordial soup theory argue that electrostatic discharges or the Sun’s ultraviolet radiation drove life’s first chemical reactions, modern life is not powered by any of these volatile energy sources

More than once I've heard "take care of the water and the water takes care of the Koi." That sure sounds good, but truly understanding the Nitrogen Cycle had baffled me until I took the K.O.I. Certified Koi Keeper course.

UV (Ultra Violet) Lights are a good way to get rid of algae bloom (green water) during the warm Summer months. K.O.I.’s recommendations on UV units can be found in the Construction module (how to install) and the Filtration module (how to operate) of K.O.I.

UV lamps are usually isolated from the water media by a sleeve made of quartz that doesn't block UV. Those sleeves are durable, unless you accidentally break them, but the lamps are not. Vendors say that UV lamps need to be replaced every year. I was wondering how to test a UV lamp to see if we could prolong its life longer. I called a UV lamp manufacturer and found a way to verify if the lamp+sleeve assembly still emits UV, without resorting to an expensive UV test equipment.

This article es from the August 2017 Newsletter of the Central California Koi Society, and written by Rosimeri Tran - republished here with her permission.  Yamato Nishiki are one of the most beautiful Koi varieties, as Rosimeri explains...

Adding salt to the water of a sick tank or quarantine tank can help sick or compromised Koi.  In essence, it makes it easier for them to breathe, just the way supplemental oxygen helps people.  To learn more about how salt reduces the osmotic pressure gradient, take K.O.I. #206 - Physiology - CLICK HERE for course description.  Here's what Dr. Richmond Loh, the Fish Vet from Australia has to say about salt...

Koi have many superpowers, but...


Congratulations to our own ANDREW MOORBY, Director of Finance for K.O.I.! 

A commercial fisherman pulled a live Asian carp out of a northern Illinois river last week about 9 miles from Lake Michigan, prompting a furious dragnet to determine whether more of the voracious fish have evaded electric barriers designed to keep them out of the Great Lakes.

While we may have control over the amount of water we put into our ponds, we don't have control of what's IN that water.  Turns out that many water supplies have been inundated with chemicals from sewage treatment plants.  Wells are also a problem, as chemicals leach into ground water supplies.  This article is about a study that concluded that 1/5th of male fish were transgender or hermaphrodites.

Work is being done to improve fish welfare, and write better standards for farmed fish or any fish kept in cativity.  This has implications for Koi keepers...

Salmon are some of the most studied fish in the world because they are a target for aquaculture and have been farmed in many countries.  Adding Beta-Glucans to feed has been successful in aiding salmon health.  Beta-Glucans are used for people too, and might be something to look for in Koi feed of the future...

In K.O.I. Nutrition courses, pond owners are taught to read the ingrediants label on their Koi food bags, and fishmeal should be one of the first components.  But is fishmeal sustainable, especially as it is being used in many aquaculture settings other than just Koi?  Read about a new alternative you may see showing up soon in Koi food.

Ever wonder how our Koi can manage in such a wide range of temperatures and pH, and find food in opaque water?  A new study shows that high genetic diversity is the key.

At least that seems to be the results of one studey.  Upgrades to a wastewater treatment plant along Ontario's Grand River led to a 70 per cent drop in fish that have both male and female characteristics within one year and a full recovery of the fish population within three years, according to researchers at the University of Waterloo.

Ever wonder why are Koi are afraid of nets and so hard to catch?  Turns out it's an evolutionary advantage to be cautious.  New research supports the creation of more marine reserves in the world's oceans because, the authors say, fish can evolve to be more cautious and stay away from fishing nets.

Here's one fish you may not want to keep in your saltwater aquarium!  This fish deals with predaturs by biting them with opiod-laced venom.

The initial purpose of eDNA methodology is for aquaculturists to avoid serious losses (deaths, inappetance, poor growth, increased production time, disease spread, cost of medicines, cost of diagnostics, delayed harvest, gaps in production, replacement costs, loss of breed lines, etc.) due to disease outbreaks, for the better health and welfare of their fish stocks.

Below is an article about the National Carp Control Plan of Australia, that does a very good job of describing what is currently known.  The decision by the govenment is due at the end of 2018, and studies are being done now...

Need a little sparkle in your pond?  Check out Gin Rin Koi. 

Two male sticklebacks of the same age -- one from a stream (top) and one from a lake (bottom) -- are each highly adapted to their own local environment. According to Bolnick, apart from a dramatic difference in size, the fish also differ in immune traits, body shape, armor to defend against predators, and "basically anything we can think to measure."
Photo Credit: Daniel Bolnick/U. of Texas at Austin

New research suggests fish fins may take advantage of 'functional curvature' to increase their stiffness for swimming.
Photo Credit: Mandre Lab / Brown University

Koi teeth, naturally shedded, pictured above.  Two studies on calcium isotopes in teeth have provided new insights into both the extinction of the marine reptiles and weaning age in humans. The findings of these studies, conducted by CNRS researchers at Lyon ENS and Université Claude Bernard Lyon, were published, respectively, on 25 and 30 May 2017 in Current Biology and PNAS. They open new avenues for research in anthropology and paleontology.

James Cook University scientists have found evidence that even distantly related Australian fish species have evolved to look and act like each other, which confirms a central tenet of evolutionary theory.

You know what K.O.I. always says, if you're not havin' FUN, you're not doin' it right!  Joke from Spike...


!If you're not havin' FUN, you're not doin' it right


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