Fish Superpowers - Anatomy, Physiology, Evolution, Genetics, Koi Characteristics, Koi/Fish Welfare

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.

Can a fish be depressed? This question has been floating around my head ever since I spent a night in a hotel across from an excruciatingly sad-looking Siamese fighting fish. His name was Bruce Lee, according to a sign beneath his little bowl.

It turns out that carp react to very low frequency magnetic fields.

There are many physiological adaptations to stress.  Read new research that indicates that stress makes our Koi shy...

How do fish communicate?  Read about the latest findings from research...

While this article is about farmed fish, it certainly applies to our Koi.  Read the research about the benefits of fish exercise...

Here's the problem...  If you keep Koi of both sexes, they spawn.  You get 1000's of babies.  If you keep just females, they can die of egg binding - they have to lay their eggs eventually, without males, they tend not to...  If you keep just males, you can't show them, and they never grow as large nor do most have pleasing body shapes.  So what's a Koi keeper to do?  What if we could sterilize Koi?  Read about new research that might evntually be of help to Koi keepers everywhere...

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

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.

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