Paddlefish

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Man! I leave for a few days and look what happens - like leaving teenagers home alone.

As the OP of this thread I feel some responsibility to try and keep it on topic and civil. Like Rodney King said - Can't we all just get along? Seriously, there's nothing productive about being accusatory or "fishier than thou". I hope we can keep focused on sharing useful information about a fascinating species. Please.

Re: "genetic dwarfs" - having raised several thousand tilapia and other species, and visited numerous commercial fish hatcheries, it is not uncommon to see individuals from the same gene pool, living under the same conditions which, for whatever reason, stay smaller than their cohorts. Now whether this is true dwarfism is debatable. It could be due to any number of things including disease, deformity, injury, chemical exposure, etc. Probably the only way to know is to selectively breed those "dinks", a serious commitment with paddlefish, or at the least try and maintain them over time as Moontanman is doing. If and when those dinks die of unknown causes, autopsy and pathology reports would be useful to determine if there was some underlying disease or deformity causing slow growth. If that could be ruled out then dwarfism would be more likely. Of course commercial hatcheries have no interest in such things. They want fast growing fish which mature early and get large. Dinks would be culled, which is probably why Moontanman was able to get his in the first place. Selecting for small size/slow growth is a legitimate approach, IMO, but it will be up to us, the hobbyists, to make that happen.

I support Moontanman's efforts and I think he has added a lot to the paddlefish conversation, as has jbiji. They have different approaches but it sounds like both are trying to provide appropriate housing and responsible care and I'm grateful both are willing to share their experiences.

As has been said, this is not a fish for everyone and it behooves anyone seriously considering keeping paddlefish (or any other fish for that matter) to learn as much as possible before acquiring one. My thanks to those willing to share - in spite of occasional flames.
 
Another question: Do you guys think Paddlefish could do well in a 3,500 gallon pond? I suppose not? Thanks in advance:)
 
One thing I've been doing while I was away is reading "The Paddlefish - Status, Management and Propagation", 1986. It is a collection of papers presented at the 45th Fish and Wildlife Conference, St Louis, MO. While somewhat dated, it does provide much good information that is useful to anyone interested in keeping paddlefish. It includes 10 papers covering subjects like biology and life history, distribution, threats to habitat, management practices, culture methods, aquaculture opportunities, etc. The paper on intensive culture is especially pertinent to our discussion here.

Here's an interesting factoid: the approach to captive rearing was as follows - in the early spring, mature males and females are captured in the wild and kept in vats while being given hormone injections to stimulate ovulation and milt production. When females are ripe they are manually stripped of eggs which are fertilized with milt collected from the males and the eggs are placed in tumblers. After hatching, the paddlefish fry are kept in tanks until they are able to feed and are then placed in outdoor ponds with heavy zooplankton levels. In the fall they are collected at 10-15" and stocked in lakes and reservoirs.

The book also includes an indexed bibliography with over 550 references.

I highly recommend this book to anyone interested in paddlefish. I got mine from abebooks for under $10.
 
Man! I leave for a few days and look what happens - like leaving teenagers home alone.

As the OP of this thread I feel some responsibility to try and keep it on topic and civil. Like Rodney King said - Can't we all just get along? Seriously, there's nothing productive about being accusatory or "fishier than thou". I hope we can keep focused on sharing useful information about a fascinating species. Please.

Re: "genetic dwarfs" - having raised several thousand tilapia and other species, and visited numerous commercial fish hatcheries, it is not uncommon to see individuals from the same gene pool, living under the same conditions which, for whatever reason, stay smaller than their cohorts. Now whether this is true dwarfism is debatable. It could be due to any number of things including disease, deformity, injury, chemical exposure, etc. Probably the only way to know is to selectively breed those "dinks", a serious commitment with paddlefish, or at the least try and maintain them over time as Moontanman is doing. If and when those dinks die of unknown causes, autopsy and pathology reports would be useful to determine if there was some underlying disease or deformity causing slow growth. If that could be ruled out then dwarfism would be more likely. Of course commercial hatcheries have no interest in such things. They want fast growing fish which mature early and get large. Dinks would be culled, which is probably why Moontanman was able to get his in the first place. Selecting for small size/slow growth is a legitimate approach, IMO, but it will be up to us, the hobbyists, to make that happen.

I support Moontanman's efforts and I think he has added a lot to the paddlefish conversation, as has jbiji. They have different approaches but it sounds like both are trying to provide appropriate housing and responsible care and I'm grateful both are willing to share their experiences.

As has been said, this is not a fish for everyone and it behooves anyone seriously considering keeping paddlefish (or any other fish for that matter) to learn as much as possible before acquiring one. My thanks to those willing to share - in spite of occasional flames.

It should be noted that even the dinks need a very large tank to live in, a 125 is the bare minimum I would recommend and some thing with a 8' by 2' foot print would be much better. I plan to build a tank with a 10' by 3' foot print, such tanks are relatively easy to built even if they aren't as pretty as all glass or plastic tanks but they are nice for big fish...
 
Here are diferend sp of sturgon whit how big they will get

Scientific Name English Name Distribution Max. Length (cm)
Polyodon spathula Mississippi paddlefish North America 221 cm
Psephurus gladius Chinese paddlefish Asia 300 cm


Scientific Name English Name Distribution Max. Length (cm)
Acipenser baerii Siberian sturgeon Asia 200 cm
Acipenser brevirostrum Shortnose sturgeon North America 143 cm
Acipenser dabryanus Yangtze sturgeon Asia 250 cm
Acipenser fulvescens Lake sturgeon North America 274 cm
Acipenser gueldenstaedtii Danube sturgeon Eurasia 236 cm
Acipenser medirostris Green sturgeon North America 250 cm
Acipenser mikadoi Sakhalin sturgeon Northwest Pacific 150 cm
Acipenser naccarii Adriatic sturgeon Europe 200 cm
Acipenser nudiventris Fringebarbel sturgeon Europe 200 cm
Acipenser oxyrinchus Atlantic sturgeon Western Atlantic 430 cm
Acipenser persicus Persian sturgeon Eurasia 242 cm
Acipenser ruthenus Sterlet sturgeon Eurasia 125 cm
Acipenser schrenckii Amur sturgeon Asia 300 cm
Acipenser sinensis Chinese sturgeon Northwest Pacific 130 cm
Acipenser stellatus Starry sturgeon Eurasia 220 cm
Acipenser sturio Sturgeon Eastern Atlantic 600 cm
Acipenser transmontanus White sturgeon Eastern Pacific 610 cm
Huso dauricus Kaluga Asia 560 cm
Huso huso Beluga Eurasia 800 cm
Pseudoscaphirhynchus fedtschenkoi Syr Darya sturgeon Former USSR 65 cm
Pseudoscaphirhynchus hermanni Dwarf sturgeon Former USSR and Asia 27.5 cm
Pseudoscaphirhynchus kaufmanni Amu Darya sturgeon Asia 75 cm
Scaphirhynchus albus Pallid sturgeon North America 200 cm
Scaphirhynchus platorynchus Shovelnose sturgeon North America 100 cm
Scaphirhynchus suttkusi Alabama sturgeon North America
 
And this to end the discusion about the tank size
If you want to keep them do 3x time lengt of the boddy in a square and than you have the minimum dimensions of the tank for them
 
for the Polyodon spathula Mississippi paddlefish North America 221 cm is this 663 cm L x 180 cm D x 663 cm B
 
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