RL.15.2
Artificial spawning of carp
Based on the film, decide which answer is correct. Na podstawie filmu zdecyduj, które odpowiedzi są poprawne.
common, triggering, a hormone, eggs, females, milt, stimulating, males, two, slower than, inhabiting, clove oil, an anaesthetic, three, faster than, pituitary gland, artificial hormones, a disinfectant, four, brood fish, small, at the same time as, males and females, separate
Male and female spawners wait for the artificial spawning in ...................................... tanks.
The female spawners have received today the ...................................... dose of hormone.
Today, also the ...................................... will receive their dose of hormones.
Milt in males developes ...................................... the eggs.
The ...................................... are better for regulating the breeding.
Clove oil is used before spawning as ......................................
To unstick the carp eggs, we need to rinse it in Voynarovitch fluid even for ...................................... hours.
We place the ...................................... in incubation apparatus.
After watching the film decide whether the sentence is true or false. Po obejrzeniu filmu zdecyduj czy zdanie jest prawdziwe czy fałszywe.
| Prawda | Fałsz | |
| Females and males wait for the artificial spawning in separate tanks. | □ | □ |
| Artificial spawning is regulated with hormones. | □ | □ |
| Hormones for hypophysis are administered to males and females at the same time. | □ | □ |
| To accelerate the development of gonads, we can use pituitary gland extract or artificial hormones, such as Ovopel. | □ | □ |
| Despite control of gonad development, it is not possible to control light and temperature of the water. | □ | □ |
| Clove oil causes stress in fish. | □ | □ |
| Anaesthetic will numb the fish, clove oil is one. | □ | □ |
| Carp eggs have low viscosity | □ | □ |
| Voynarovich fluid decreases eggs viscosity. | □ | □ |
The course of artificial spawning
Decide which fragment complete the gaps in the sentences. Zdecyduj, które fragmenty najlepiej uzupełniają luki w zdaniach.
squeeze out the eggs, hormonal agents, hormonal agents, incubation apparatus, water, milt, fertilised eggs, nursery tanks, use the solution, rinse the eggs, incubation time, inhibit the artificial spawning, anaesthesia, accelerate the maturity, incubation apparatus, Unsticking eggs, fertilise the eggs, pituitary gland, Incubation time, one dish, pour water, maintain the temperature, artificial hormones, Eggs fertilisation, mix the water, gametes collection, granulate feed
During controlled breeding .............................................................. are administered to the spawners.
The fish in the anesthetic solution enters the .............................................................. in few minutes.
To .............................................................. of spawners, we use hypophysis.
Hypophysis is injecting the fish with .............................................................. extract.
After the second injection it is important to ..............................................................
After carefully drying the female, we .............................................................. to a dry bowl.
The fertilisation takes place after pouring the eggs with .............................................................. , careful mixing and adding water.
Unstuck eggs are transferred to .............................................................. in the number of 2 litres per jar
.............................................................. is about 100 degree-days.
RAS - Recirculating aquaculture systems
Hello, I would like to show you our intensive breedingintensive breeding based on the water recirculationwater recirculation system. Recirculating aquaculture systems are fish farming in water, which circulates completely in a closed cycleclosed cycle.
- How is the production water purified?
- Multiple use of the same water in the production process is possible due to the use of efficient filtrationfiltration and other methods for water treatmentwater treatment.
Water flowing out of the production tanks is cleaned in mechanicalmechanical and biological filtersbiological filters. Before the water reaches the fish tanks again, harmful gases are removed. The water must be degasseddegassed and oxygenated with pure oxygenoxygenated with pure oxygen. Since the fish growth rate is directly related to the water temperature, it is essential to maintain the optimal water temperature. Heat exchangersHeat exchangers with a thermoregulator are used for this.
- Are there any fish health problems?
- Water used in production comes from deep wells. The system of closed water circulation and „cutting off” from the external environment eliminates viral or parasitic diseases. We have constant veterinary supervisionveterinary supervision. We use preventivepreventive and curative treatmentstreatments. We carry out fish baths and disinfection of devicesdisinfection of devices. The medicines are given in the feed as prescribed by the veterinarian. The water circulating in the circulation is continuously disinfected using ultraviolet lamps.
- What are the advantages and what are the disadvantages of the RAS system?
- The biggest advantage of RAS is the possibility of full health control of fishhealth control of fish and the possibility of very precise determination of food rations. It contributes to a very fast growth rate. The disadvantage of the system is the high degree of technological complexity. The recirculation system is expensive to build and maintain.
However, despite these drawbacks, this is the future of aquaculture.
Based on the hypertext 1, complete the gaps in the sentences. Use the word bank. Na podstawie hipertekstu 1 uzupełnij luki w zdaniach. Skorzystaj z banku słów.
inspection, tanks, fish, equipment, supervision, system, circulation, filtration, Water
I would like to show our intensive breeding, based on water recirculation .......................
Recirculating aquaculture systems are breeding of ...................... in water that circulates completely in a closed circuit.
Water flowing out of the production ...................... is cleaned in mechanical and biological filters.
...................... you need to be degassed and re-oxygenated with pure oxygen.
Multiple use of the same water in the process is possible due to the use of efficient ...................... and other methods for water treatment.
A closed water ...................... system and isolation of production from the external environment eliminates the entry of viruses and parasites.
We have a permanent veterinary .......................
The greatest advantage of RAS is the possibility of full fish health ...................... and the possibility of precisely determining food rations.
We conduct fish baths and disinfections of .......................
Trout’s production cycle
- Good morning, soon we will conduct an artificial spawning of rainbow trout. After spawning, we will put eggs in incubation equipment. You need to control the flow of water and apply preventive baths.
- How long will incubation last for eggs?
- The length of incubation depends on the water temperature and is around 340 degree‑daysdegree‑days. This means that if the water temperature remains at 10°C, the incubation period will be 34 days. Attention should be paid to the moment of egg fertilisationmoment of egg fertilisation. After fertilisation, the eggs will become less sensitive.
- When should I start feeding the fish?
- As the brood begins to hatch, it does not take food. It feeds on the yolk sacyolk sac. Only after resorption of 70% of the bag, the brood fish swim under the surface and fills the swim bladderswim bladder. This is the moment when you should start feeding artificial feed.
- How long does the brood fish stay in the nursery pondsnursery ponds?
- About 4 weeks until it reaches a mass of about 1 gram. Then we will move it to a pond or a rotation tankrotation tank. It will stay there until autumn. In the autumn, we will get the fry of about 10‑20 grams.
- What stockingsstockings are we using in the trout pondstrout ponds?
- Trout production is an intensive production. The production volume depends on the oxygen content in the incoming water. It also depends on the oxygen consumption of 1 kg of fishoxygen consumption of 1 kg of fish. In addition, we oxygenate the ponds with pure oxygen to increase the available oxygen content in the wateravailable oxygen content in the water.
Trout is a coldwater fishcoldwater fish and continues to grow in winter. So you have to feed it according to food dosesfood doses developed by feed manufacturers. In the spring we will get fry weighing 50 grams. The further fattening of troutfattening of trout consists in feeding, sorting and controlling environmental conditions. After 3‑4 months we will get the first commercial fishcommercial fish. The minimum weight of trout for sale is 200‑250 g.
Based on the hypertext “Trout’s production cycle”, connect the Polish terms with their English counterparts. Na podstawie hipertekstu „Cykl produkcji pstrąga”, połącz polskie terminy z ich angielskimi odpowiednikami.
zawartość tlenu w wodzie, podchowalniki, tucz pstrągów, zaoczkowanie ikry, woreczek żółtkowy, baseny rotacyjne, produkcja intensywna, aparaty inkubacyjne, pęcherz pławny
| eggs fertilisation | |
| incubation apparatus | |
| yolk sac | |
| swim bladder | |
| rotation tanks | |
| intensive rearing | |
| oxygen content in the water | |
| nursery ponds | |
| fattening of trouts |
Care treatments in the hatchery
HANDLING INSTRUCTIONS FOR EGGS
Eggs disinfectionEggs disinfection.
Spawn from our hatchery is disinfected with a iodophor solution at least 3 times before sale. We can use saline solution or hydrogen peroxide for disinfection. The use of chemical substanceschemical substances, such as copper sulphate or chloramine is not recommended. They have a negative impact on biological filtersbiological filters.
Preventive baths
Preventive baths prevent molding and sticking together of eggsmolding and sticking together of eggs and limit the possibility of bacterial infectionsbacterial infections of eggs and brood fish.
Starting from the next day after obtaining the spawn and placing it in incubation devices, carry out preventative baths every day. Work with the veterinarian and local authorities to use a proper treatment methodtreatment method if needed.
Water disinfectionWater disinfection
Water flowing in a closed cycle needs to disinfected using UV radiation or ozonationozonation. Ultraviolet radiationUltraviolet radiation is the most effective when the UV lamp is placed in the flowing water. The disadvantage of ozonation is the negative impact on human health. When the nitrogen level in the water is too high, there are gas bubbles. This leads to high mortality.
Caring for eggsCaring for eggs
Through the whole incubation periodincubation period of the eggs to the moment of hatching, the hygiene of hatching apparatushygiene of hatching apparatus needs to be maintained. The care consists in removing dead eggsremoving dead eggs and brood fish with proper tools. Frequent control of proper water flow through incubation devices and its oxygen saturation is important.
Caring for brood fishCaring for brood fish
Start to feed them when 50% of brood fish will emerge or when 80% will absorb the yolk sac. Use high‑quality starters administered at the right time, as those are critical factors for the growth of small fish. Feed them often manually or using automatic feedersautomatic feeders.
Fill the gaps with missing expressions. Wstaw w wolne miejsca brakujące sformułowania.
method of treatment, ultraviolet radiation, automatic feeders, chemical substances, bacterial infections, yolk sac, removing dead eggs, hygiene in the hatching apparatus
It is not recommended to use other .................................................................. like copper sulphate or chloramine.
Preventive baths prevent molding and sticking of eggs and limit the possibility of .................................................................. of eggs and brood fish.
Cooperation with the veterinarian and local services allows you to use the appropriate ..................................................................
When the UV lamp is placed in the flowing water, the .................................................................. is the most effective.
During the incubation period of the eggs the .................................................................. should be maintained until hatching
The care consists in .................................................................. and brood fish with appropriate tools
You should feed often, by hand or with ..................................................................
Start feeding when 50% of the brood fish comes out or when 80% absorbs the ..................................................................
Breeding improvement of fish
Pictures
Game
Zasób interaktywny dostępny pod adresem https://zpe.gov.pl/a/Da97J1wP8
Zasób interaktywny dostępny pod adresem https://zpe.gov.pl/a/Da97J1wP8
Zasób interaktywny dostępny pod adresem https://zpe.gov.pl/a/Da97J1wP8
Dictionary
przyspieszenie dojrzałości
anestetyk
sztuczne tarło
karmniki automatyczne
zawartość tlenu w wodzie
zakażenia bakteryjne
filtry biologiczne
doskonalenie hodowlane ryb
wykluwanie się wylęgu
pielęgnacja wylęgu
pielęgnacja ikry
odmiany karpia
substancje chemiczne
obieg zamknięty
ryba zimnolubna
pobieranie gamet
ryby towarowe
rozród kontrolowany
termin rozrodu
odgazowanie wody
stopniodni
wymienniki ciepła
geny dominujące
zaoczkowanie ikry
Dezynfekcja ikry
tucz pstrągów
ikrzyce
zapłodnienie ikry
filtracja wody
dawki pokarmowe
gamety
informacja genetyczna
genotyp
gonady
kontrola zdrowotności ryb
zabiegi profilaktyczne
heterozja
środki hormonalne
hormony
hybrydyzacja
higiena aparatów wylęgowych
hypofizacja
inbred
aparaty inkubacyjne
inkubacja ikry
okres inkubacji
czas inkubacji
intensywna hodowla
produkcja intensywna
filtry mechaniczne
mlecz
mleczaki
pleśnienie ikry
liczba chromosomów
podchowalniki
zużycie tlenu
natlenienie
ozonowanie
pokolenie rodzicielskie
przysadka mózgowa
dezynfekcja urządzeń
geny recesywne
usuwanie martwych jaj
płukanie ikry
baseny rotacyjne
usypianie tarlaków
tempo wzrostu
wyciskanie ikry
stan narkozy
kleista ikra
dawka pobudzająca
obsady
pęcherz pławny
metoda leczenia
dawka wyzwalająca
triploidy
stawy pstrągowe
promieniowanie ultrafioletowe
rozklejanie ikry
nadzór weterynaryjny
dezynfekcja wody
recyrkulacja wody
uzdatnianie wody
woreczek żółtkowy