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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!

When examining data on a graph or reading facts and figures from a newspaper, it’s important you understand the difference between percent and percentage point.

Begin the process of identifying unknown bacteria by observing their physical characteristics, such as cell wall, shape and linkages.

More than three-quarters of the earth's atmosphere consists of nitrogen, yet only four-hundredths of one percent of the mass of the oceans, atmosphere, and earth's crust is composed of nitrogen.

Koi whiskers are known as maxillary barbels.

Read this fascinating article about the new research...  There are definite implications here for Koi growth rates...

Koi can be hermaphrodites in addition to being just male or female.  Apparently, many fish have also evolved to be able to change sex.  If you're interested in the science, read the fascinating new research on how fish change sex - link to download the article below.

Below is the URL for a video from Australian Fish Vet Richmond Loh...

Below is the URL for a video from Australian Fish Vet Richmond Loh...

While none of these articles are specifically about Koi, the Koi keeper can learn many things by skimming these pages provided by Universities and the Aquaculture Industry.  All pdfs are available for reading on-line or downloading.

This is an excellent 3-page summary about water quality applicable to Koi ponds or any recirculating system in which fish are kept.  See Outline of topics below...

This is a 4-page article that is an excellent reference for preparing a new filter without fish.  See Outline of topics below...

This is a 10-page article that is an excellent reference for creating a quarantine or sick tank.  See Outline of topics below...

This is an excellent 12-page article applicable to Koi ponds or any recirculating system in which fish are kept.  See Outline of topics below...

This is an excellent 12-page article applicable to Koi ponds or any recirculating system in which fish are kept.  See Outline of topics below...

This is an excellent 6-page article applicable to Koi ponds or any recirculating system in which fish are kept.  See Outline of topics below...

We are constantly reminded not to feed our Koi too much - both for the sake of Water Quality, and for the health of the Koi.  And this time of year, some of us are not feeding at all because the water temperature is blow 50 degrees.  But is it possible to feed the Koi too little?

While this research pertains to wild fish, one of the species studied was Crucian carp, and it shows how easily are fish are affected by environmental agents that are not under our control.

The text below is the recommendation of Fish Veterinarian Richmond Loh of Australia, and is suitable for all fish - both Koi and aquarium species.  Please read the notes after the article...

Have you ever wanted to clean the bottom of a q-tank (or sick tank, or holding tank) without emptying the tank?

By Katy Shanafelt, IWGKS

Ah, Christmas morning. Waking up early and running down the stairs to excitedly tear into a
brand new package of… pond chems?
Wait, that’s not quite right.
OK, pond chemicals and additives might not be the most exciting gift idea of all time. Still, that
doesn’t mean that your loved one’s aquatic hobby has to be absent from under the tree this year.
There are tons of great, exciting pond-related gifts that will surprise and delight your pond lover.

There are many, many stressors for fish.  This study shows that noise can change fish behavior.  The image above show how noise stresses people - just imagine what that picture looks like for Koi!

This study shows that individuals reactions to stress vary widely.  We cannot assume that while one Koi does not seem to be affected by a stressor, that another Koi might be overwhelmed by the same stressor.  You can read more about Koi and Stress in our ebook:  https://koiorganisationinternational.org/product/koi-stress

In a special experiment, zebrafish with defective immune systems swam and dined with counterparts with normal immune systems. In short order, their gut microbiomes became similar.

Male black-finned goodeid or mexcalpique fish know what they want when they pick a female to mate with; they prefer them big-bellied and as orange as possible. Interestingly, females displaying these traits are the ones most able to produce more offspring that survive, two researchers from the National Autonomous University of Mexico have found. The study by Marcela Méndez-Janovitz and Constantino Macías Garcia is published in Springer's journal Behavioral Ecology and Sociobiology.

A new study finds that the presence of exotic fish (non-native, like Koi) in rivers does not alter the native fish response to  environmental pollution, which is a known stressor.    If the competition of non-native species is stressful, and stress is cumulative, then this is an unexpected result.

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


 

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