finding daphnia or moina

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flumon
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Joined: Fri Jan 07, 2022 3:30 pm

finding daphnia or moina

Post by flumon »

I've been wondering, can we actually find daphnia or moina in rivers or canals? I mean, they're typically associated with ponds and lakes, but is it possible they inhabit these other types of water bodies too? Additionally, are there specific locations or conditions that are more conducive to finding daphnia or moina, or can we identify certain characteristics that indicate their presence?
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coltin
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Re: finding daphnia or moina

Post by coltin »

Daphnia are generally found in cooler climates, while moina prefer warmer climates. Typically, you'll find them in freshwater ponds and lakes, but not in flowing water like rivers or canals.

When collecting daphnia from lakes with water birds, be aware that they may carry parasitic worms that can infect fish. To minimize this risk, culture the daphnia in tubs of green water for a few weeks, then transfer the young to clean tubs of green water. Let them grow and produce young, and transfer those young to new tubs of green water. This process helps ensure a healthy food source for your fish.

To catch daphnia, use a 10-12 inch aquarium fish net with coarse netting, or create a net using mosquito netting. Move the net through the water, and you'll see clouds of daphnia flicking about. Simply scoop them out and transfer them to a bucket of water to take home.

When lifting the net, be careful not to overcrowd it, as this can cause the daphnia to get crushed and die. Keep their bucket of water in the shade to prevent overheating.

To maintain optimal oxygen levels, gently aerate the bucket of water. Avoid excessive bubbling, as this can damage the daphnia by causing them to bounce off the sides of the bucket.
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flumon
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Re: finding daphnia or moina

Post by flumon »

coltin wrote: Fri Jan 07, 2022 7:48 pm Daphnia are generally found in cooler climates, while moina prefer warmer climates. Typically, you'll find them in freshwater ponds and lakes, but not in flowing water like rivers or canals.

When collecting daphnia from lakes with water birds, be aware that they may carry parasitic worms that can infect fish. To minimize this risk, culture the daphnia in tubs of green water for a few weeks, then transfer the young to clean tubs of green water. Let them grow and produce young, and transfer those young to new tubs of green water. This process helps ensure a healthy food source for your fish.

To catch daphnia, use a 10-12 inch aquarium fish net with coarse netting, or create a net using mosquito netting. Move the net through the water, and you'll see clouds of daphnia flicking about. Simply scoop them out and transfer them to a bucket of water to take home.

When lifting the net, be careful not to overcrowd it, as this can cause the daphnia to get crushed and die. Keep their bucket of water in the shade to prevent overheating.

To maintain optimal oxygen levels, gently aerate the bucket of water. Avoid excessive bubbling, as this can damage the daphnia by causing them to bounce off the sides of the bucket.
I went to a lake with strong small tides, but I couldn't find daphnia there. Is it possible to find them in a well, or are they only in certain types of lakes or ponds?
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coltin
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Re: finding daphnia or moina

Post by coltin »

You typically don't find daphnia in wells due to the lack of food sources. Wells often have clean water, which isn't suitable for daphnia as they feed on bacteria, small single-celled organisms like paramecium, and algae. If the well water is used for drinking, it's likely too clean to support daphnia.

If the lake is freshwater, it might have daphnia, but they're usually found in calm, shallow areas, typically less than 3 feet deep. Look for them near reeds or other plants along the lake's edge or in the water. However, if there are fish in the lake, they'll likely consume most of the daphnia, making them harder to find.
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