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pirate perch culture


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#181 centrarchid

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Posted 13 March 2020 - 08:59 AM

Despite having abundant zooplankton, the Pirate Perch are feeding only during while dark. They did not come out to feed when sky darkened by heavy storm. Most feeding activity takes place near bottom. So far the fish have not come higher into water column to take advantage of concentrated zooplankton at ends of tank.

 

Tank currently in use.

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#182 centrarchid

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Posted 31 March 2020 - 07:43 AM

Looks like multiple spawns were produced last night based on appearance of females. The fish were concentrated around spawning cites I provided about an hour before dawn. No females show distended abdomens. Will harvest and replace spawning sites this evening. If decent spawn realized, then setup cleaned up for spawning Black Crappie where a video camera can be placed directly over action. Pirate Perch brood(s) will be moved inside for more controlled rearing. Any Pirate Perch offspring that fall from substrate are likely not to be molested by crappie adults so will be watched for when crappie larvae / fry swim up.


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#183 centrarchid

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Posted 01 April 2020 - 08:49 PM

Now we are seeing what appears to be natural behavior. Courting males blanch while courting females get darker. I busted a pair courting at about 4:30 Pm, so daylight yet. nest site deeper than I have ever encountered in a stream. Serious signs of activity around nest site. Currently missed placed camera but when found it will be worth it. Tomorrow the spawning site will be harvested.


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#184 centrarchid

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Posted 01 April 2020 - 09:25 PM

Nest site is darker gray square with light colored end. Note exposed bottom around about 3/4 of the nest site.

 

20200401_162129.jpg


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#185 centrarchid

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Posted 03 April 2020 - 07:27 AM

Evidence for spawning now more direct. I can see eggs in harvested nest sites. Potential water mite issue will be addressed to increase number of fry that survive.


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#186 Michael Wolfe

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Posted 03 April 2020 - 11:09 AM

I love this content (I hate like buttons and don't think we need them, but this kind of thread is great and I have no valuable input, so I just wanted to say thank you and keep us informed!)


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#187 centrarchid

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Posted 03 April 2020 - 07:55 PM

IMG_2020-04-03_06-09-29.jpeg

 

IMG_2020-04-03_05-58-37.jpeg

 

 

Bad eggs all that a visible.

IMG_2020-04-03_05-57-27.jpeg


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#188 centrarchid

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Posted 05 April 2020 - 01:07 PM

I am going to invent a word because I can. The word is "spit" referring to the cluster of eggs produced by a single female pirate perch during a single breeding encounter. Puke was considered, but specified coming from stomach which is not accurate.

 

Embryo below collected early this morning is between 24 and 48 hours post-fertilization. I think on lower part of that range.

 

 

Pirate+Perch+Embryo.jpg


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#189 Matt DeLaVega

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Posted 06 April 2020 - 11:31 AM

Same boat as Michael. I dig this but have nothing smart to say.


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#190 centrarchid

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Posted 06 April 2020 - 01:11 PM

Ask "can they be raised in numbers to support a food-fish industry?"


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#191 Matt DeLaVega

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Posted 06 April 2020 - 05:15 PM

Hmm. can they be raised.......... and why them?


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#192 centrarchid

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Posted 08 April 2020 - 05:07 AM

I do not think so. They do not appear capable of moving into a schooling mode after passing through fry stage. Even as fry they do not seem able to move about as a group. The capacity for schooling appears common to all species I know of that are raised at densities needed for food fish production.


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#193 centrarchid

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Posted 09 April 2020 - 06:58 AM

Females are getting plump for another round. Plankton forage appears dominated by water mites and copepods plus some kind of small worm. Phytoplankton is starting to outstrip grazing since waterfleas have been essentially eliminated by the Pirate Perch.


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#194 centrarchid

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Posted 10 April 2020 - 09:12 AM

Spawning activity resumed last night at both nest sites that are nearly 10' apart.


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#195 centrarchid

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Posted 21 April 2020 - 09:25 AM

Pirate Perch done spawning because I made it so.  They were gearing up for what appeared to be fourth round. Having a hatch-ability issue for some reason. That will have to be resolved next year. Water mites might be involved with that.


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#196 Matt DeLaVega

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Posted 30 April 2020 - 08:19 PM

You probably now know more about spawning pirate perch than anyone else in the universe.


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#197 MtFallsTodd

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Posted 01 May 2020 - 06:50 AM

Super interesting thread, thanks for sharing.
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