SlideShare a Scribd company logo
Orkney Trout Cycle
Egg Spawning
Trout lay their eggs in nests in river gravels,
known a redds. The female builds the nest,
usually between November and January
when the water is cold and carrying lots of
oxygen, because that is what the eggs need
to hatch.
Egg Hatching
As the eggs that have just been laid develop you start to see the ova develop
with them. This is called the eyed ova stage. The eggs hatch more quickly if the
water they are in is warm. In Orkney we usually try to keep the water at 5
degrees meaning that the eggs take roughly around 90 days to hatch. The
newly hatched trout are called alevins, and they live in the gravel having yolk
that is attached to their bodies for about 25 days after hatching to feed on.
Once again they grow quicker in warmer water.
Fry
Once the yolk of the alevins has been eaten, the alevins become fry,
emerge from the gravel and feed on tiny insects in the water. A lot of
brown trout die in this stage. They are only a few centimetres long and
consume a lot of energy. They have to find plenty of food quickly as
possible. They usually keep away from other fry and are territorial and
need stones and plants to hide in. they also need shallow water (1-
40cm) and isn’t fast flowing.
Parr
A one year old trout is called a Parr. They are
small with marks on their scales and they lose
these when they age. They live in the same habitat
as fry with stones. They will gradually drop
downstream with water flow rather than fighting the
stream going up.
Adult Trout
Adult trout have a territory that gives them a good supply of food and a
place to hide from predators, preferring deeper pools. In winter they
migrate, perhaps miles up river to spawn. Brown trout can live from 5 to
20 years.
The whole Brown trout cycle repeats itself.
Adult Trout
Adult trout have a territory that gives them a good supply of food and a
place to hide from predators, preferring deeper pools. In winter they
migrate, perhaps miles up river to spawn. Brown trout can live from 5 to
20 years.
The whole Brown trout cycle repeats itself.

More Related Content

What's hot

Get outdoors and fish Galveston
Get outdoors and fish GalvestonGet outdoors and fish Galveston
Get outdoors and fish Galveston
Christine Hopkins
 
8 Must-Have Flies for Alaskan Rainbow Trout
8 Must-Have Flies for Alaskan Rainbow Trout8 Must-Have Flies for Alaskan Rainbow Trout
8 Must-Have Flies for Alaskan Rainbow Trout
Trident Fly Fishing
 
WildGuys - Elgro River Lodge
WildGuys - Elgro River LodgeWildGuys - Elgro River Lodge
WildGuys - Elgro River Lodge
wianterblanche
 
Lilyr10
Lilyr10Lilyr10
Lilyr10
Year56
 
The Giant Pacific Octopus
The Giant Pacific OctopusThe Giant Pacific Octopus
The Giant Pacific Octopus
Mrs. Drouare
 
The Giant Pacific Octopus
The Giant Pacific OctopusThe Giant Pacific Octopus
The Giant Pacific Octopus
Mrs. Drouare
 
Finn loves fishing for bass!
Finn loves fishing for bass!Finn loves fishing for bass!
Finn loves fishing for bass!
SoleilH
 
The amazing turtles!!
The amazing turtles!!The amazing turtles!!
The amazing turtles!!
Erica Mixon
 
Jorden report
Jorden reportJorden report
Jorden report
MissMatich
 
Com respiren els animals marins
Com respiren els animals marinsCom respiren els animals marins
Com respiren els animals marins
Escola
 
0382 pnp2 nature notes seals v4
0382 pnp2 nature notes   seals v40382 pnp2 nature notes   seals v4
0382 pnp2 nature notes seals v4
jlhig
 
Marine animals
Marine animalsMarine animals
Marine animals
englishateneu
 
Habitat PowerPoint
Habitat PowerPointHabitat PowerPoint
Habitat PowerPoint
learningfforlife
 
Baby Turtle
Baby TurtleBaby Turtle
Baby Turtle
PAVELESCU MAGDALENA
 
Projecte dels cavallets de mar.
Projecte dels cavallets de mar.Projecte dels cavallets de mar.
Projecte dels cavallets de mar.
dalmaucarles
 
Logan and eric
Logan and ericLogan and eric
Logan and eric
Lynette Kenyon
 
5 L All About Sea Lions
5 L All About Sea Lions5 L All About Sea Lions
5 L All About Sea Lions
lmollenhauer
 

What's hot (17)

Get outdoors and fish Galveston
Get outdoors and fish GalvestonGet outdoors and fish Galveston
Get outdoors and fish Galveston
 
8 Must-Have Flies for Alaskan Rainbow Trout
8 Must-Have Flies for Alaskan Rainbow Trout8 Must-Have Flies for Alaskan Rainbow Trout
8 Must-Have Flies for Alaskan Rainbow Trout
 
WildGuys - Elgro River Lodge
WildGuys - Elgro River LodgeWildGuys - Elgro River Lodge
WildGuys - Elgro River Lodge
 
Lilyr10
Lilyr10Lilyr10
Lilyr10
 
The Giant Pacific Octopus
The Giant Pacific OctopusThe Giant Pacific Octopus
The Giant Pacific Octopus
 
The Giant Pacific Octopus
The Giant Pacific OctopusThe Giant Pacific Octopus
The Giant Pacific Octopus
 
Finn loves fishing for bass!
Finn loves fishing for bass!Finn loves fishing for bass!
Finn loves fishing for bass!
 
The amazing turtles!!
The amazing turtles!!The amazing turtles!!
The amazing turtles!!
 
Jorden report
Jorden reportJorden report
Jorden report
 
Com respiren els animals marins
Com respiren els animals marinsCom respiren els animals marins
Com respiren els animals marins
 
0382 pnp2 nature notes seals v4
0382 pnp2 nature notes   seals v40382 pnp2 nature notes   seals v4
0382 pnp2 nature notes seals v4
 
Marine animals
Marine animalsMarine animals
Marine animals
 
Habitat PowerPoint
Habitat PowerPointHabitat PowerPoint
Habitat PowerPoint
 
Baby Turtle
Baby TurtleBaby Turtle
Baby Turtle
 
Projecte dels cavallets de mar.
Projecte dels cavallets de mar.Projecte dels cavallets de mar.
Projecte dels cavallets de mar.
 
Logan and eric
Logan and ericLogan and eric
Logan and eric
 
5 L All About Sea Lions
5 L All About Sea Lions5 L All About Sea Lions
5 L All About Sea Lions
 

Similar to Troot cycle

Trout cycle
Trout cycleTrout cycle
Trout cycle
AP Pietri
 
Common Egg layers in Aquarium
Common Egg layers in AquariumCommon Egg layers in Aquarium
Common Egg layers in Aquarium
Vishnuraj R S
 
Marvels in the world of animals
Marvels in the world of animalsMarvels in the world of animals
Marvels in the world of animals
iyalspelman
 
Breeding, cold water fishery
Breeding, cold water fisheryBreeding, cold water fishery
Breeding, cold water fishery
Kartik Mondal
 
The salmon life cycle
The salmon life cycleThe salmon life cycle
The salmon life cycle
learningfforlife
 
Let’s learn about frogs!
Let’s learn about frogs!Let’s learn about frogs!
Let’s learn about frogs!
Lis Regula
 
Turtles
TurtlesTurtles
Turtles
nikit123
 
Aquarium fish and ornamental organism
Aquarium fish and ornamental organism Aquarium fish and ornamental organism
Aquarium fish and ornamental organism
Sameer Chebbi
 
Aquarium fish and Marine aquarium fish and Marine ornamental organisms
Aquarium fish and Marine aquarium fish and Marine ornamental organisms Aquarium fish and Marine aquarium fish and Marine ornamental organisms
Aquarium fish and Marine aquarium fish and Marine ornamental organisms
Sameer Chebbi
 
Horse shoe crab
Horse shoe crabHorse shoe crab
Horse shoe crab
JoynalAbedin20
 
Charlie's estuaries
Charlie's estuariesCharlie's estuaries
Charlie's estuaries
chazarspazar
 
crocodiles-170126055706.pdf
crocodiles-170126055706.pdfcrocodiles-170126055706.pdf
crocodiles-170126055706.pdf
ShwetaSingh323013
 
Crocodiles
CrocodilesCrocodiles
The dolphin
The dolphinThe dolphin
The dolphin
englishateneu
 
Sea turtles introduction
Sea turtles introductionSea turtles introduction
Sea turtles introduction
Al Nahian Avro
 
Vertebrates
VertebratesVertebrates
Vertebrates
jonalyn shenton
 
Animals that Live in Estuaries
Animals that Live in EstuariesAnimals that Live in Estuaries
Animals that Live in Estuaries
ingyu2000
 
Salmon
SalmonSalmon
Salmon
Victor Choy
 
Aquaculture
Aquaculture Aquaculture
Aquaculture
NARTHANAA SENAVARAYAN
 
Life cycle of animals.
Life cycle of animals.Life cycle of animals.
Life cycle of animals.
Vinnan
 

Similar to Troot cycle (20)

Trout cycle
Trout cycleTrout cycle
Trout cycle
 
Common Egg layers in Aquarium
Common Egg layers in AquariumCommon Egg layers in Aquarium
Common Egg layers in Aquarium
 
Marvels in the world of animals
Marvels in the world of animalsMarvels in the world of animals
Marvels in the world of animals
 
Breeding, cold water fishery
Breeding, cold water fisheryBreeding, cold water fishery
Breeding, cold water fishery
 
The salmon life cycle
The salmon life cycleThe salmon life cycle
The salmon life cycle
 
Let’s learn about frogs!
Let’s learn about frogs!Let’s learn about frogs!
Let’s learn about frogs!
 
Turtles
TurtlesTurtles
Turtles
 
Aquarium fish and ornamental organism
Aquarium fish and ornamental organism Aquarium fish and ornamental organism
Aquarium fish and ornamental organism
 
Aquarium fish and Marine aquarium fish and Marine ornamental organisms
Aquarium fish and Marine aquarium fish and Marine ornamental organisms Aquarium fish and Marine aquarium fish and Marine ornamental organisms
Aquarium fish and Marine aquarium fish and Marine ornamental organisms
 
Horse shoe crab
Horse shoe crabHorse shoe crab
Horse shoe crab
 
Charlie's estuaries
Charlie's estuariesCharlie's estuaries
Charlie's estuaries
 
crocodiles-170126055706.pdf
crocodiles-170126055706.pdfcrocodiles-170126055706.pdf
crocodiles-170126055706.pdf
 
Crocodiles
CrocodilesCrocodiles
Crocodiles
 
The dolphin
The dolphinThe dolphin
The dolphin
 
Sea turtles introduction
Sea turtles introductionSea turtles introduction
Sea turtles introduction
 
Vertebrates
VertebratesVertebrates
Vertebrates
 
Animals that Live in Estuaries
Animals that Live in EstuariesAnimals that Live in Estuaries
Animals that Live in Estuaries
 
Salmon
SalmonSalmon
Salmon
 
Aquaculture
Aquaculture Aquaculture
Aquaculture
 
Life cycle of animals.
Life cycle of animals.Life cycle of animals.
Life cycle of animals.
 

More from Antoine Pietri

P4 7 orkney coastline challenge - copy
P4 7 orkney coastline challenge - copyP4 7 orkney coastline challenge - copy
P4 7 orkney coastline challenge - copy
Antoine Pietri
 
P1 3 walking abc
P1 3 walking abcP1 3 walking abc
P1 3 walking abc
Antoine Pietri
 
Christmas jumper day
Christmas jumper dayChristmas jumper day
Christmas jumper day
Antoine Pietri
 
Fof stn chairman's annual report 2020 1
Fof stn chairman's annual report 2020 1Fof stn chairman's annual report 2020 1
Fof stn chairman's annual report 2020 1
Antoine Pietri
 
Agm minute 12th march 2019
Agm minute 12th march 2019Agm minute 12th march 2019
Agm minute 12th march 2019
Antoine Pietri
 
Annual report financial statement december 2019
Annual report financial statement december 2019Annual report financial statement december 2019
Annual report financial statement december 2019
Antoine Pietri
 
Risk assessment pupil return stronsay school final version 9th august 20
Risk assessment pupil return stronsay school final version 9th august 20Risk assessment pupil return stronsay school final version 9th august 20
Risk assessment pupil return stronsay school final version 9th august 20
Antoine Pietri
 
New term letter to parents advising on the restart of school.
New term letter to parents advising on the restart of school.New term letter to parents advising on the restart of school.
New term letter to parents advising on the restart of school.
Antoine Pietri
 
Letter to parents on monday 17th august.
Letter to parents on monday 17th august.Letter to parents on monday 17th august.
Letter to parents on monday 17th august.
Antoine Pietri
 
Estimates letter to parents
Estimates letter to parentsEstimates letter to parents
Estimates letter to parents
Antoine Pietri
 
Coronavirus a book_forchildren
Coronavirus a book_forchildrenCoronavirus a book_forchildren
Coronavirus a book_forchildren
Antoine Pietri
 
Winter newsletter
Winter newsletterWinter newsletter
Winter newsletter
Antoine Pietri
 
Remembrance 2019
Remembrance 2019Remembrance 2019
Remembrance 2019
Antoine Pietri
 
Order of athletic events
Order of athletic eventsOrder of athletic events
Order of athletic events
Antoine Pietri
 
Nis rules 2019
Nis rules 2019Nis rules 2019
Nis rules 2019
Antoine Pietri
 
Blue slips parent letter
Blue slips parent letterBlue slips parent letter
Blue slips parent letter
Antoine Pietri
 
S.o.s. christmas post poster
S.o.s. christmas post posterS.o.s. christmas post poster
S.o.s. christmas post poster
Antoine Pietri
 
Curriculum rationale
Curriculum rationaleCurriculum rationale
Curriculum rationale
Antoine Pietri
 
Exec summary for_parents_final_july_2018 (1)
Exec summary for_parents_final_july_2018 (1)Exec summary for_parents_final_july_2018 (1)
Exec summary for_parents_final_july_2018 (1)
Antoine Pietri
 
Community conversations final
Community conversations finalCommunity conversations final
Community conversations final
Antoine Pietri
 

More from Antoine Pietri (20)

P4 7 orkney coastline challenge - copy
P4 7 orkney coastline challenge - copyP4 7 orkney coastline challenge - copy
P4 7 orkney coastline challenge - copy
 
P1 3 walking abc
P1 3 walking abcP1 3 walking abc
P1 3 walking abc
 
Christmas jumper day
Christmas jumper dayChristmas jumper day
Christmas jumper day
 
Fof stn chairman's annual report 2020 1
Fof stn chairman's annual report 2020 1Fof stn chairman's annual report 2020 1
Fof stn chairman's annual report 2020 1
 
Agm minute 12th march 2019
Agm minute 12th march 2019Agm minute 12th march 2019
Agm minute 12th march 2019
 
Annual report financial statement december 2019
Annual report financial statement december 2019Annual report financial statement december 2019
Annual report financial statement december 2019
 
Risk assessment pupil return stronsay school final version 9th august 20
Risk assessment pupil return stronsay school final version 9th august 20Risk assessment pupil return stronsay school final version 9th august 20
Risk assessment pupil return stronsay school final version 9th august 20
 
New term letter to parents advising on the restart of school.
New term letter to parents advising on the restart of school.New term letter to parents advising on the restart of school.
New term letter to parents advising on the restart of school.
 
Letter to parents on monday 17th august.
Letter to parents on monday 17th august.Letter to parents on monday 17th august.
Letter to parents on monday 17th august.
 
Estimates letter to parents
Estimates letter to parentsEstimates letter to parents
Estimates letter to parents
 
Coronavirus a book_forchildren
Coronavirus a book_forchildrenCoronavirus a book_forchildren
Coronavirus a book_forchildren
 
Winter newsletter
Winter newsletterWinter newsletter
Winter newsletter
 
Remembrance 2019
Remembrance 2019Remembrance 2019
Remembrance 2019
 
Order of athletic events
Order of athletic eventsOrder of athletic events
Order of athletic events
 
Nis rules 2019
Nis rules 2019Nis rules 2019
Nis rules 2019
 
Blue slips parent letter
Blue slips parent letterBlue slips parent letter
Blue slips parent letter
 
S.o.s. christmas post poster
S.o.s. christmas post posterS.o.s. christmas post poster
S.o.s. christmas post poster
 
Curriculum rationale
Curriculum rationaleCurriculum rationale
Curriculum rationale
 
Exec summary for_parents_final_july_2018 (1)
Exec summary for_parents_final_july_2018 (1)Exec summary for_parents_final_july_2018 (1)
Exec summary for_parents_final_july_2018 (1)
 
Community conversations final
Community conversations finalCommunity conversations final
Community conversations final
 

Recently uploaded

Introduction to AI for Nonprofits with Tapp Network
Introduction to AI for Nonprofits with Tapp NetworkIntroduction to AI for Nonprofits with Tapp Network
Introduction to AI for Nonprofits with Tapp Network
TechSoup
 
South African Journal of Science: Writing with integrity workshop (2024)
South African Journal of Science: Writing with integrity workshop (2024)South African Journal of Science: Writing with integrity workshop (2024)
South African Journal of Science: Writing with integrity workshop (2024)
Academy of Science of South Africa
 
MARY JANE WILSON, A “BOA MÃE” .
MARY JANE WILSON, A “BOA MÃE”           .MARY JANE WILSON, A “BOA MÃE”           .
MARY JANE WILSON, A “BOA MÃE” .
Colégio Santa Teresinha
 
Top five deadliest dog breeds in America
Top five deadliest dog breeds in AmericaTop five deadliest dog breeds in America
Top five deadliest dog breeds in America
Bisnar Chase Personal Injury Attorneys
 
The basics of sentences session 5pptx.pptx
The basics of sentences session 5pptx.pptxThe basics of sentences session 5pptx.pptx
The basics of sentences session 5pptx.pptx
heathfieldcps1
 
A Strategic Approach: GenAI in Education
A Strategic Approach: GenAI in EducationA Strategic Approach: GenAI in Education
A Strategic Approach: GenAI in Education
Peter Windle
 
The basics of sentences session 6pptx.pptx
The basics of sentences session 6pptx.pptxThe basics of sentences session 6pptx.pptx
The basics of sentences session 6pptx.pptx
heathfieldcps1
 
writing about opinions about Australia the movie
writing about opinions about Australia the moviewriting about opinions about Australia the movie
writing about opinions about Australia the movie
Nicholas Montgomery
 
Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...
Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...
Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...
Dr. Vinod Kumar Kanvaria
 
Hindi varnamala | hindi alphabet PPT.pdf
Hindi varnamala | hindi alphabet PPT.pdfHindi varnamala | hindi alphabet PPT.pdf
Hindi varnamala | hindi alphabet PPT.pdf
Dr. Mulla Adam Ali
 
The History of Stoke Newington Street Names
The History of Stoke Newington Street NamesThe History of Stoke Newington Street Names
The History of Stoke Newington Street Names
History of Stoke Newington
 
How to Build a Module in Odoo 17 Using the Scaffold Method
How to Build a Module in Odoo 17 Using the Scaffold MethodHow to Build a Module in Odoo 17 Using the Scaffold Method
How to Build a Module in Odoo 17 Using the Scaffold Method
Celine George
 
ANATOMY AND BIOMECHANICS OF HIP JOINT.pdf
ANATOMY AND BIOMECHANICS OF HIP JOINT.pdfANATOMY AND BIOMECHANICS OF HIP JOINT.pdf
ANATOMY AND BIOMECHANICS OF HIP JOINT.pdf
Priyankaranawat4
 
PIMS Job Advertisement 2024.pdf Islamabad
PIMS Job Advertisement 2024.pdf IslamabadPIMS Job Advertisement 2024.pdf Islamabad
PIMS Job Advertisement 2024.pdf Islamabad
AyyanKhan40
 
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...
Nguyen Thanh Tu Collection
 
Main Java[All of the Base Concepts}.docx
Main Java[All of the Base Concepts}.docxMain Java[All of the Base Concepts}.docx
Main Java[All of the Base Concepts}.docx
adhitya5119
 
Azure Interview Questions and Answers PDF By ScholarHat
Azure Interview Questions and Answers PDF By ScholarHatAzure Interview Questions and Answers PDF By ScholarHat
Azure Interview Questions and Answers PDF By ScholarHat
Scholarhat
 
Advanced Java[Extra Concepts, Not Difficult].docx
Advanced Java[Extra Concepts, Not Difficult].docxAdvanced Java[Extra Concepts, Not Difficult].docx
Advanced Java[Extra Concepts, Not Difficult].docx
adhitya5119
 
DRUGS AND ITS classification slide share
DRUGS AND ITS classification slide shareDRUGS AND ITS classification slide share
DRUGS AND ITS classification slide share
taiba qazi
 
Natural birth techniques - Mrs.Akanksha Trivedi Rama University
Natural birth techniques - Mrs.Akanksha Trivedi Rama UniversityNatural birth techniques - Mrs.Akanksha Trivedi Rama University
Natural birth techniques - Mrs.Akanksha Trivedi Rama University
Akanksha trivedi rama nursing college kanpur.
 

Recently uploaded (20)

Introduction to AI for Nonprofits with Tapp Network
Introduction to AI for Nonprofits with Tapp NetworkIntroduction to AI for Nonprofits with Tapp Network
Introduction to AI for Nonprofits with Tapp Network
 
South African Journal of Science: Writing with integrity workshop (2024)
South African Journal of Science: Writing with integrity workshop (2024)South African Journal of Science: Writing with integrity workshop (2024)
South African Journal of Science: Writing with integrity workshop (2024)
 
MARY JANE WILSON, A “BOA MÃE” .
MARY JANE WILSON, A “BOA MÃE”           .MARY JANE WILSON, A “BOA MÃE”           .
MARY JANE WILSON, A “BOA MÃE” .
 
Top five deadliest dog breeds in America
Top five deadliest dog breeds in AmericaTop five deadliest dog breeds in America
Top five deadliest dog breeds in America
 
The basics of sentences session 5pptx.pptx
The basics of sentences session 5pptx.pptxThe basics of sentences session 5pptx.pptx
The basics of sentences session 5pptx.pptx
 
A Strategic Approach: GenAI in Education
A Strategic Approach: GenAI in EducationA Strategic Approach: GenAI in Education
A Strategic Approach: GenAI in Education
 
The basics of sentences session 6pptx.pptx
The basics of sentences session 6pptx.pptxThe basics of sentences session 6pptx.pptx
The basics of sentences session 6pptx.pptx
 
writing about opinions about Australia the movie
writing about opinions about Australia the moviewriting about opinions about Australia the movie
writing about opinions about Australia the movie
 
Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...
Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...
Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...
 
Hindi varnamala | hindi alphabet PPT.pdf
Hindi varnamala | hindi alphabet PPT.pdfHindi varnamala | hindi alphabet PPT.pdf
Hindi varnamala | hindi alphabet PPT.pdf
 
The History of Stoke Newington Street Names
The History of Stoke Newington Street NamesThe History of Stoke Newington Street Names
The History of Stoke Newington Street Names
 
How to Build a Module in Odoo 17 Using the Scaffold Method
How to Build a Module in Odoo 17 Using the Scaffold MethodHow to Build a Module in Odoo 17 Using the Scaffold Method
How to Build a Module in Odoo 17 Using the Scaffold Method
 
ANATOMY AND BIOMECHANICS OF HIP JOINT.pdf
ANATOMY AND BIOMECHANICS OF HIP JOINT.pdfANATOMY AND BIOMECHANICS OF HIP JOINT.pdf
ANATOMY AND BIOMECHANICS OF HIP JOINT.pdf
 
PIMS Job Advertisement 2024.pdf Islamabad
PIMS Job Advertisement 2024.pdf IslamabadPIMS Job Advertisement 2024.pdf Islamabad
PIMS Job Advertisement 2024.pdf Islamabad
 
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...
 
Main Java[All of the Base Concepts}.docx
Main Java[All of the Base Concepts}.docxMain Java[All of the Base Concepts}.docx
Main Java[All of the Base Concepts}.docx
 
Azure Interview Questions and Answers PDF By ScholarHat
Azure Interview Questions and Answers PDF By ScholarHatAzure Interview Questions and Answers PDF By ScholarHat
Azure Interview Questions and Answers PDF By ScholarHat
 
Advanced Java[Extra Concepts, Not Difficult].docx
Advanced Java[Extra Concepts, Not Difficult].docxAdvanced Java[Extra Concepts, Not Difficult].docx
Advanced Java[Extra Concepts, Not Difficult].docx
 
DRUGS AND ITS classification slide share
DRUGS AND ITS classification slide shareDRUGS AND ITS classification slide share
DRUGS AND ITS classification slide share
 
Natural birth techniques - Mrs.Akanksha Trivedi Rama University
Natural birth techniques - Mrs.Akanksha Trivedi Rama UniversityNatural birth techniques - Mrs.Akanksha Trivedi Rama University
Natural birth techniques - Mrs.Akanksha Trivedi Rama University
 

Troot cycle

  • 2. Egg Spawning Trout lay their eggs in nests in river gravels, known a redds. The female builds the nest, usually between November and January when the water is cold and carrying lots of oxygen, because that is what the eggs need to hatch.
  • 3. Egg Hatching As the eggs that have just been laid develop you start to see the ova develop with them. This is called the eyed ova stage. The eggs hatch more quickly if the water they are in is warm. In Orkney we usually try to keep the water at 5 degrees meaning that the eggs take roughly around 90 days to hatch. The newly hatched trout are called alevins, and they live in the gravel having yolk that is attached to their bodies for about 25 days after hatching to feed on. Once again they grow quicker in warmer water.
  • 4. Fry Once the yolk of the alevins has been eaten, the alevins become fry, emerge from the gravel and feed on tiny insects in the water. A lot of brown trout die in this stage. They are only a few centimetres long and consume a lot of energy. They have to find plenty of food quickly as possible. They usually keep away from other fry and are territorial and need stones and plants to hide in. they also need shallow water (1- 40cm) and isn’t fast flowing.
  • 5. Parr A one year old trout is called a Parr. They are small with marks on their scales and they lose these when they age. They live in the same habitat as fry with stones. They will gradually drop downstream with water flow rather than fighting the stream going up.
  • 6. Adult Trout Adult trout have a territory that gives them a good supply of food and a place to hide from predators, preferring deeper pools. In winter they migrate, perhaps miles up river to spawn. Brown trout can live from 5 to 20 years. The whole Brown trout cycle repeats itself.
  • 7. Adult Trout Adult trout have a territory that gives them a good supply of food and a place to hide from predators, preferring deeper pools. In winter they migrate, perhaps miles up river to spawn. Brown trout can live from 5 to 20 years. The whole Brown trout cycle repeats itself.