wylęg vs narybek

16:45 Feb 25, 2021
This question was closed without grading. Reason: No acceptable answer

Polish to English translations [PRO]
Science - Fisheries
Polish term or phrase: wylęg vs narybek
Opracowanie dotyczy zarybiania jezior szczupakiem.

Byłem pewien, że autor, pisząc o "wylęgu", ma na myśli "fry".

(...) informacjach na temat wielkości rybackich odłowów szczupaka, oraz ilości wylęgu żerującego wprowadzonego do badanych jezior (...)

(...) bardziej opłacalne ekonomicznie jest zarybianie wylęgiem, niż starszymi formami (...)


(...) Ważne jest, że wylęg pochodził z odłowionych miejscowo tarlaków (...),

do czasu, aż pojawił się "narybek".

(...) najbardziej opłacalną metodą może być stosowanie wylęgu i narybku szczupaka (...)

(...) nieuzasadnione jest zarybianie wylęgiem lub wczesnymi formami narybku wód, w których tarło naturalne odbywa się na wystarczającym poziomie (...)
tabor
Poland
Local time: 23:32


Summary of answers provided
3fry vs fingerling
geopiet


Discussion entries: 6





  

Answers


1 day 4 hrs   confidence: Answerer confidence 3/5Answerer confidence 3/5
fry vs fingerling


Explanation:
Broodstock collection begins every March for northern pike and leads into walleye and muskellunge collection through April. Adult fish are brought into the hatchery from lakes and spawned to collect eggs.

These coolwater species eggs hatch in 10 to 15 days and the resulting fish are called "sac fry." These sac fry vary in size from small to tiny. The sac fry grow from 3 to 10 days on their yolk sac. How fast they grow depends on water temperature and fish species

After the nutrients in the yolk sac are used up, the fry go through a period called "swim-up" when they become suspended in the water column and begin free swimming. They begin looking for a food source, whether it is a natural food such as plankton from a hatchery pond or fish food dropping from a hatchery feeder.

The photo shows northern pike fry in a hatchery tank at the "swim-up" stage, about 10 days post hatch.

Once these fry have accepted feed, they quickly grow into small fingerlings. Northern pike and tiger muskellunge are grown in the hatchery building on a pellet diet until they reach stocking size of 7 and 10 inches respectively.

- https://www.njfishandwildlife.com/artfry05.htm

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Note added at 1 day 4 hrs (2021-02-26 20:58:02 GMT)
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Life of a pike

Sac fry

You develop inside your tiny egg for about two weeks, all the time in danger of being discovered by a fish, turtle, or other predator. After hatching from your soft eggshell, you remains tuck to an aquatic plant by a sticky patch on your forehead for the next 10 days. You are now known as a sac fry. Your newname comes from the large yolk sac that is still part of your body. The energy-rich yolk sac is similar to what is in a chicken egg, but with one big difference: While a chick consumes the yolk before hatching, a fish doesn’t consume the yolk until after it hatches. Of course, you don’t really eat the yolk like a fried egg (you don’t even have a mouth yet).Rather, you slowly absorb the energy into your body.

Swim-up fry

After you’ve absorbed most of your yolk sac, you experience your first taste of freedom. You have detached from your plant, you have developed a mouth, and you must now go search for food. You’re not a great swimmer yet, so you spend the next three weeks making short trips away from the safety of the plants you hide near. You swim up to the surface of the water, grab a tiny bit of plankton to eat, then float back down to your hiding spot. You are now known as a swim-up fry.

Fingerling

After about a month of swimming up for food, you have grown to the size of a human finger, a few inches in length.
You are now called a fingerling. This is a big milestone in the life of a young pike. You are now equipped with strong muscles for swimming, and your first set of baby teeth. It’s time for you to become a true predator.

- https://files.dnr.state.mn.us/mcvmagazine/young_naturalists/... - page 2

geopiet
Native speaker of: Native in PolishPolish
PRO pts in category: 28
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