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| What fish should I use in this climate? http://byap.backyardmagazines.com/forum/viewtopic.php?f=2&t=29295 |
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| Author: | rudder [ Dec 2nd, '17, 14:00 ] |
| Post subject: | What fish should I use in this climate? |
I have an opportunity to help start a large Aquaponics system in Moyobamba, Peru. Moyobamba is the high jungle at 1000m above sea level. Moyobamba averages 22.8 celsius yearly (73 degrees F). The coldest month on average is August when average temperature is only 21.4C (70F). The coldest temp ever recorded was 6C (42.8F). I do believe low temperatures during the coldest time of year regularly get into the 50s overnight. I was reading a little about Tilapia. Apparently there's a blue variety that's a little more cold hardy, but perhaps it has its drawbacks? Personally I'm learning towards Pacu, because I think those low temperatures are too low for any Tilapia. I think the species is Piaractus brachypomus, but according to Wikipedia there are a few species that could be called Pacu: Myleus pacu, el pacú chico , un pez de los ríos amazónicos. Piaractus mesopotamicus, el pacú blanco, mbiraí o pez chato, natural de la cuenca del Paraná. Piaractus brachypomus o Colossoma b., el pacú panza roja, gambitana, morocoto o cachama roja, común en la Amazonia. Colossoma macropomum o Piaractus macropomus, el pacú negro, cachama negra o cherna natural de la cuenca del Orinoco. Mylossoma paraguayensis, el pacú reloj,[1] pacú-peva,[1] pacucito,[1] medallón[1] o brillantina.[1] Is Pacu more forgiving of cool temperatures than Tilapia? What species of Pacu are they raising here? https://m.youtube.com/watch?v=FJxoYwFiOLY In the description they mention Pacu and Gamitana as if it's two different fish, but the Wikipedia list makes me think they're both the same: P. brachypomus. I read however that that species requires 22 - 28C water. I assume those open ponds are unheated. Does the fact that they're in contact with the ground make them insulated enough to keep temperatures high enough on the cool nights or is it safe to assume that those species are more cold tolerant than many sources give them credit for? |
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| Author: | IDL [ Dec 3rd, '17, 02:18 ] |
| Post subject: | Re: What fish should I use in this climate? |
Fancy goldfish do well any where from 32 degrees fahrenheit to 85 degrees fahrenheit. (in celcius,0-30 degrees) I have no idea about pacu, but it seem like they would do well to. |
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| Author: | scotty435 [ Dec 3rd, '17, 04:40 ] |
| Post subject: | Re: What fish should I use in this climate? |
Might also try some of the native fish Doncella (Pseudoplatystoma) or Paiche I see listed in some comments from that area. A large enough pond where the temperature doesn't fluctuate as much might work for Tilapia and the Blue Tilapia will probably work but you might need to be concerned about them becoming an aquatic pest if they get loose. Not certain I have that genus right but just trying to get you started. |
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| Author: | dlf_perth [ Dec 3rd, '17, 14:07 ] |
| Post subject: | Re: What fish should I use in this climate? |
keep in mind that water temperatures will fluctuate much less than air temperature. eg. have a look at Gordons (Gungalla) graphs in his thread to see air temps versus water temps. As a rule the middle between the max and min is typical of the water temperatures. If you have sunlight during cold epriods then it is possible to thermal heat for a few extra degrees. Can be done easily with black plastic poly pipe etc. Not sure on eating quality but some of the other Chjclids survive as introduced pests in Australian creeks. Talipia is considered a massive risk (hence is banned). Stream water temps would be 10-15 degrees. May not grow but might survive OK. |
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| Author: | rudder [ Dec 4th, '17, 05:15 ] |
| Post subject: | Re: What fish should I use in this climate? |
For a 1000 sqft floating tank system, what would be the expected temp fluctuation? The average yearly temp of 22 is still slightly colder than the preferred range. I want to prioritize species that eat vegetables, so I can use Moringa as feed. I see conflicting info about the fish I'm interested.... particularly P. brachypomus and mylossoma duriventre. Would be nice if there were information from people who have knowingly subjected these species to temps in the 10 - 14 range to determine their adaptability. |
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| Author: | rudder [ Dec 4th, '17, 12:00 ] |
| Post subject: | Re: What fish should I use in this climate? |
Actually I might be better off using Piaractus mesopotamicus https://link.springer.com/article/10.10 ... 44?LI=true https://link.springer.com/article/10.10 ... 017-0198-y Although I don't think it's readily available in Peru. Any ideas how to obtain stock? |
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| Author: | GurkanYeniceri [ Dec 5th, '17, 08:00 ] |
| Post subject: | Re: What fish should I use in this climate? |
Don't you have any trout there? |
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| Author: | earthbound [ Dec 5th, '17, 08:04 ] |
| Post subject: | Re: What fish should I use in this climate? |
Your starting to hit on the answer there. Stock what ever is available locally as fingerling, not much sense in thinking about anything else really.. They are available and generally suited to your local conditions, and there should be suitable feed available for them as well. |
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