Jay Hemdal attempts to recreate a laser size reference first seen on a deep submersible to create a more accurate way to measure aquarium inhabitants for growth studies and other purposes.
A Refinement of a Fish Length Estimation Method
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Freshwater Articles
Underwater Photography in Aquariums
In-tank underwater photography can be a necessity in public aquarium settings.
Public Aquarists and the Haplochromine Cichlids of Lake Victoria, Africa
An introductory look at the plight of Lake Victoria’s endangered cichlids and the LVSSP.
The End of Aquariums?
A bill now working its way through the United States Congress would effectively end the keeping of non-native species in home aquariums.
Eye-Droop in Arowana and Arapaima gigas
Jay Hemdal examine an affliction of fish seen mainly in public aquariums (and a few larger home aquariums); “eye-droop” in the Osteoglossids.
Don’t Release Fish Into the Wild!
Specimens of Pterygoplichthys disjunctivus, the vermiculated sailfin pleco, have been collected from South African rivers, so the government of South Africa is considering legislation aimed at controlling invasive organisms, including fish.
Maximum Sizes of Fish in Captivity – an Estimation Tool
Many of us use FishBase for their maximum size records…I had a strong feeling that many fish do not grow as large in captivity as they can in the wild.
Is Our Hobby In Trouble?
During tough economic times, does the aquarium industry find itself struggling, or flourishing?
Aquatic Invasive Species
In light of invasive species, the time has likely come for the development of effective Aquarium Industry certification system.
Public Aquarium Resources
Jay Hemdal examines four crucial resources for public aquarists around the country.
