Best Builder Food for rays

  • We are currently upgrading MFK. thanks! -neo
T1KARMANN;4878903; said:
As for zoos and aquariums not feeding pellets well pellets are not a cheap option to feed on a large scale and I wouldn't be surprised if zoos and aquariums get the lower grade stuff or foods that won't be good enough to sell the next morning as they work on a tight budget which doesn't allow the cost of pellets when they can get the fish meat for next to nothing


I'll chime in on this one. Many places will figure out the cheapest long term solution to large scale feedings at public aquariums. However, the ones where animals thrive spend top dollar and will work to provide the best possible solution. In my dealings with various places world wide, I would say 85% of them strive for the best quality diet (which replicates natural nutrion that these animals consume). Are pellets in the mix? Of course they are. Several companies produce great products. Do they feed solely pellets? No, not at all.



DavidW;4879241; said:
Fatty liver disease work was done by the New England Aquarium biologists, one of the first in the US to breed any species of ray, over 30 years ago. It was a subject covered at the Freshwater stingray symposium in Chicago 2 years ago.

I will atest to the work NEA did on fatty liver as I used their info in some of the work I've done with captive FW ray husbandry protocols used in many US aquarium facilities. FLD is an ongoing problem in captive elasmobranch species (not just FW rays). One of MANY topics I wish we shared more openly about from the Symposium a couple years ago at Shedd. Diet/nutrional needs is one of the most widely debated topics with FW ray owners. It's my opinion (based on my limited 11 years of FW ray keeping) that we need to go back to what they are doing in the wild. They eat small amounts throughout the day. Diet varies by locality in the wild - not by species. They don't vary the diet daily, but seasonally. If one type of larval stage insect is easy to get, they eat that. Two months later if a particular shrimp is easy to find, they eat that. The same even holds true in their saltwater counter parts. Variety is the spice of life.
 
Again I ask are prawn mussel cochlea beef heart sprats White bait silver sides natural foods for rays and the answer will be no as they are all salt water foods with the exception on beef heart

Even earth worms or night crawlers wouldn't be a natural food for rays unless they climb on the bank and dig them up themselves

As for what's in hikari who knows it's not like KFC would tell you what's in the stuff they put on the chicken or people would replicate it

There must be some kind of bird in it as when we had the bird flu scare a few years back ALL hikari products were banned from the UK

If you read the back of any packet of hikari pellets it will tell you how much protein fat ash moisture and something else that I can't remember of the top of my head

It feed pellets for a few reasons
1 the rays love them
2 it seams to be much better for water conditions if you feed beef heart or silver sides or White bait it can leave a Oil mess on your water surface and unless you chop it up into bite size bits when the rays chew it you get loads of tiny scale all over the tank
3 if you go on holiday or in hospital like I am now it much easier to tell someone to throw in 4 big handfuls of pellets rather then getting them to go and prepaid a whole plate of sea food

I would like to here the up sides of feeding sea food please don't say cost as that's a poor excuse
 
A very interesting discussion. Just don't see the need for so much steam.....
 
Just to play a bit of devil's advocate:
There are freshwater prawn, shrimp, muscle and clam on the market similar to what they consume in the rivers of South America.

There are many types of worms that are being eaten in the wild, and most are similar in composition to common earthworms as far as diet is concerned.
 
I feed mostly good quality pellets ( Dainichi, Hikari, will now start with NSL ) but also feed fresh food ( prawn, worms, mussels ). Do not feed more fresh because of the toll on water.
 
Mazuri also makes a great Shark/Ray gel diet that is very well matched to nutritional needs of 99% of the elasmobranch species kept today.
 
well i did suspect that an easy way to get a high protein content would be to use chcken carcases and with all the bones from the waste fish and chicken that could add some explination to the high ash content through drying or something .

i didnt realise hikari had issues with the bird flu scare but potential chicken content as t1 sugests could be the reason.

im not against any . pellets fine . fresh is fine. and frozen is fine. i just think that ideally a mixutre / variety is what makes the difference even if not all of us offer it ( i know i dont offer enough variety for several reasons )

however . if people consider the potential contents of pellets ( essentially bits of fish /animal thats not for human market )then they might consider them just another variation, like feeding prawns one day . mussels the next . pellets after that ( some feed one type constantly as its easy for them it may be prawns it may be pellets either way the variation is missing )

but to go back to t1s dog sugestion my dogs get bored with the same dried food and happily take anything available or even just a variation in the dried food ( different flavour or type)

im sure wild rays would take anything available even if it was sea fish , worms , peices of cow if it was small enough, chicken shrimp and anything that might fit in its mouth really so not really an issue imo. just because it doesnt float down the river often doesnt mean it cant be used or fed to them as im sure they would given the opertunity. i see humans apearing on shark menus all the time and they are land dwellers after all :D

i think its good that there is somone comenting who is linked to a manufacturer as whilst they might promote somethings more than others , they would be hard pushed to lie and get away with it. so whilst the opinion might be a bit altered . the facts should be spot on and better than people who dont work in the same industry :)

so , for the pellet content, so far we are suspecting. fish discards ( heads bones etc ) , chicken peices ( lower quality dog food type carcases ) and lots of ash because its dried before pelleting

the mineral and vitamin content is still there either way and if it were offered in the wild it would still be eaten im sure

still the comments will be interesting :)
 
David I have never hidden the fact of what company I am associated with. A quick 30 second scan of my previous comments on MFK (including those made today), and even a mental midget could figure that out.

I didn't mention the company or product line as it has nothing to do with the discussion at hand, anymore than if you worked for a frozen fish or shrimp company. You're still wrong, and pointing your finger at me simply shows that you have run out of ammo in this discussion. Not that you ever had any.

As for his remark about manufacturers not revealing content of their food due to proprietary information, that is just flat out BS.

Really? Perhaps you've never heard of a little thing called a confidentiality agreement? It's common in industries such as this where the competition is always attempting to one up everything that other manufacturers do.
It's a legal binding document, and fairly common in many business settings. If you created something that you felt was better than any other similar type of product on the market, would you publicly advertise the minute details of what & how went into that process? Only a moron would do such a thing. This isn't an industry wide conspiracy against consumers, as you would have everyone believe.


Also, I have no problem with those that feed live/frozen foods, and have stated just that many times on this forum, including the last time we crossed swords 4 yrs ago. Here's a direct quote;

David,

Just so there's no confusion on your part, I've never had a problem with anyone that chooses to feed live/frozen foods, even exclusively over commercial foods, but to suggest that this type of feeding will supply more optimum nutrition than a high quality pellet, or that some of these nutrients, such amino acids, vitamins, and minerals are completely lacking in all pellet foods, is so far out there in left field that I found it next to impossible not to respond to those comments.

I also never once stated that earthworms have no nutritional value to a fish, or that one should never feed earthworms.

And exactly how does that make my comments false, or me unethical?

Read the last link I provided again, note where it says that much of the food contains meal made from rejected shrimp or fish and pellet food is processed at high temperature...RD is trying to con you that recycled reject fish or shrimp parts are better than fresh 'for human consumption' shrimp or fish, which is obviously wrong.

So on the words of 1 individual, and 1 article, you have made a determination on ALL commercial foods, as though they are all equal in raw ingredients, and processed under the exact same conditions?

Are you serious? :grinno:

Using your logic we should all be feeding our dogs kibbles & bits.
And you have the audacity to toss science up in T1's face?
Whoa .......


As far as issues with fat deposition, I have been harping about this long before MFK existed, including in our last discussion 4 yrs ago. This problem is old news to me, and is well known by those who work in the nutrition side of this industry. Below is a comment that I made here on MFK just last week.

Although some people on this site do feed cat food, dog food, hot dogs, and god only knows what else, over the long haul these types of foods are not healthy for a fish.

The crude fat content found in most cat food will be a minimum of 15-20%, which means it could be well over 20% in some formulas. That alone would keep me from feeding that food to fish as it is simply way too high (over double) the fat content that most warm water fish can metabolize & utilize as an energy source.

All of that excess fat settles around the liver, and reduces the lifespan of the fish.

To quote Dr. Ruth Francis-Floyd, a professor at the U of Florida whom is considered by many to be an expert on fish nutrition;



Quote:
"Fatty infiltration of the liver has also been designated "the most common metabolic disturbance and most frequent cause of death in aquarium fish"
Quote:
With prolonged feeding of a high-energy, lipid rich diet, degenerative changes of the liver and death can occur unless the diet is corrected.
Monitoring how your fish appear in your tank won't give you an inside view of fat deposition around their liver. There are studies involving carnivorous species fed high fat (17%) diets, which resulted in excess liver deposition, which if fed over a prolonged period would result in necrosis of the liver.

If cost/savings is an issue, you would be far better off buying a decent quality commercial bulk feed from a feed mill, or your local hardware store. Like most things in life, you get what you pay for.

Please note the last paragraph where I suggested to the OP & others that for their situation they would "be far better off buying a decent quality commercial bulk feed from a feed mill, or your local hardware store. ".

I must be one crappy salesman, eh? :D


And on that note I agree with Zoodiver, smaller more frequent feedings are far more ideal for rays than 1 large meal per day. Having said that, both pellets & fresh/frozen cause fatty degeneration of the liver, it all boils down to what, and how much each hobbyist feeds their fish on a daily basis.

I believe that I warned Firemedic about this exact thing when he was
initially feeding his rays Silver Cup's sturgeon feed, which IMO has a rather high lipid content, especially for mature rays. I didn't make a big hoopla over it, or tell him that he was going to kill his rays on that diet, or promote NLS to him. I simply gave him & others a heads up.


What you offer David isn't education, it's simply the rantings of someone who doesn't understand any of the science, so they refuse to accept any of it. That's fine by me, but there's no reason to shoot everyone else down that holds a different opinion than yours.
 
Zoodiver;4879477; said:
Just to play a bit of devil's advocate:
There are freshwater prawn, shrimp, muscle and clam on the market similar to what they consume in the rivers of South America.

There are many types of worms that are being eaten in the wild, and most are similar in composition to common earthworms as far as diet is concerned.

This was stated earlier but some seem to think that all prawns, mussels/clams are only from salt.
Freshwater prawns and muscles are available here in the US, can't speak for UK.
As for as the worms they don't have to climb out and dig them up, during rain they are forced out of the
saturated ground thus washed into the rivers and lakes. Or I guess we forget about the rainy seasonal
flooding where they can also prey on the worms.
 
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