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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!

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...

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...

Koi judging in Japan is based on the 50-30-20 rule and includes the three basic topics, including 50% conformation, 30% quality, and 20% pattern, followed by standards within each variety.

When purchasing Koi for show you may want to base your choice on these topics as this is how shows are judged. Those purchasing Koi for pleasure will also find satisfaction using these topics as a guide in the selection of pleasing and healthy Koi.  

Conformation is the appropriate body shape, proportions, finnage, head shape, spacing and can include the ability to emanate power.

While Carp Edema Virus (CEV) was originally limited to Japan, it's now out there in Europe, and probably the USA too.  If you keep Koi, you'll need to learn more about this killer Virus...  Remember, there is NO CURE for viruses, the only way to keep your Koi alive is to PREVENT it in the first place.  Read the abstract below, and I've also posted a link so you can download the original research.

Tag, you're it, the chase is on! It's early summer and love is in the air, in our ponds that is. It's a beautiful, sunshine day, and then it hits you - foam everywhere; phew, that fishy smell; plants shredded and tipped over. The girls are round and robust and the boys are egg-seeking missiles hot after the girls making laps chasing the girls around the pond. What is all this "kommotion?" The water temperatures and day lengths are ideal and it's time for spawning.

The very first bony fish on Earth was susceptible to arthritis, according to a USC-led discovery that may fast-track therapeutic research in preventing or easing the nation's most common cause of disability.

A researcher in Germany is studying why fish sometimes smells 'fishy.'

Ancient southern China fish may have evolved prior to the 'Age of Fish.'  'Shield scale' fish may provide insight into the early evolution of jawed vertebrates.

As fins evolve to help fish swim, so does the nervous system.  Study shows that shape and mechanics of fish fins evolve in parallel with the sensory system, tuned to swimming behavior.

In schooling fish, collective movement emerges as a result of multiple social interactions between individuals.

The aquatic environment is full of tantalizing chemicals that can guide a fish to mates or meals.

As the FRDC investigates whether or not it is feasible to release a carp-killing virus, one fisher contemplates a future without his nemesis.

By Tom Bicknell

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