fish digestion and feeding
DESCRIPTION
Next Generation Science / Common Core Standards Addressed HS‐LS2‐6.Evaluate the claims, evidence, and reasoning that the complex interactions in eco systems maintain relatively consistent numbers and types of organisms in stable conditions, but changing conditions may result in a new ecosystem. HS‐LS4‐5. Evaluate the evidence supporting claims that changes in environmental conditions may result in: (1) increases in the number of individuals of some species, (2) the emergence of new species over time, and (3) the extinction of other species. [Clarification Statement: Emphasis is on determining cause and effect relationships for how changes to the environment such as deforestation, fishing, application of fertilizers, drought, flood, and the rate of change of the environment affect distribution or disappearance of traits in species.TRANSCRIPT
Fish Digestion and Feeding Next Generation Science / Common Core
Standards Addressed
HSLS26.Evaluate the claims, evidence, and reasoning that the
complex interactions in eco systems maintain relatively consistent
numbers and types of organisms in stable conditions, but changing
conditions may result in a new ecosystem. HSLS45. Evaluate the
evidence supporting claims that changes in environmental conditions
may result in: (1) increases in the number of individuals of some
species, (2) the emergence of new species over time, and (3) the
extinction of other species. [Clarification Statement: Emphasis is
on determining cause and effect relationships for how changes to
the environment such as deforestation, fishing, application of
fertilizers, drought, flood, and the rate of change of the
environment affect distribution or disappearance of traits in
species. Agriculture, Food, and Natural Resource Standards
Addressed
AS Analyze feed rations and assess if they meet the nutritional
needs of animals. AS c. Select appropriate feedstuffs for animals
based on a variety of factors (e.g., economics, digestive system
and nutritional needs, etc.). Bell Work / Objectives Describe the
fish digestive system.
Describe the common methods of feeding fish. Explain how to
interpret a feed label. Terms Anus Auger feeding system Automated
feeding systems Blowers
Branchiospines Carnivores Demand feeders Esophagus Hand feeding
Intestines Mouth Prepared feed Stomach Identifying Fish Digestion
and Feeding
Make a list of what you have eaten in the last 24 hours. Where did
you eat those foods at? How was the food served? How is the body
able to digest and utilize the food you consumed? What are the
parts of the fish digestive system?
The fish digestive system is somewhat similar to other animals.
Size and shape of each component of the system will vary with the
type of fish and its diet. Carnivores Fish that eats meat. Have a
large stomach and short intestines. What are the parts of the fish
digestive system?
Parts include: Mouth Teeth Tongue Branchiospines Esophagus Stomach
Intestines Anus What are the parts of the fish digestive
system?
Mouth Entry point of system. Carnivores mouth Have many teeth that
point inwards. Not used for chewing. Used to capture and hold prey.
Other fish Few or no teeth. What are the parts of the fish
digestive system?
Tongue Helps move food around in the mouth. Branchiospines Act as
filters to capture small food from water as the fish swims. Part of
the gill structure that helps fish swim. Esophagus Short tube that
connects mouth to stomach. What are the parts of the fish digestive
system?
Stomach Organ where digestion begins. Some stomachs will expand
greatly. Allows them to eat large quantities of food. Other
stomachs are small that will accommodate only small amounts of
food. Some fish have almost no stomach. Esophagus connects directly
to intestines. What are the parts of the fish digestive
system?
Intestines Site of food digestion and nutrient absorption. Anus
Exterior opening of system. Unused food and wasted material is
exited. What are some common methods of feeding fish?
Feeding fish is very important. Provide the appropriate nutrition.
Observe fish for any abnormal signs. Feeding systems differ based
on size of the operation. Small operations Large operations What
are some common methods of feeding fish?
Small Operations Hand feeding Feed is distributed by hand, shovels,
or other non-automated means. Most common method. Used for feeds
not suited for automated systems. Meat scraps are hand fed. What
are some common methods of feeding fish?
Large Operations Automated feeding systems Utilize machinery to
distribute the feed. From relatively simple to very complicated,
computer-controlled. Blowers Demand feeders Auger feeding systems
What are some common methods of feeding fish?
Blowers Drive along the side of the pond and blow feed out into the
pond. Attached to trucks or tractors. Common in levee pond and
watershed pond operations. What are some common methods of feeding
fish?
Demand feeders Allow fish to bump a rod and release feed when they
are hungry. Used in raceways. Fish must be trained how to use them.
What are some common methods of feeding fish?
Auger feeding Similar to systems used by swine and poultry farmers.
Feed stored in large tanks Moved by augers that drop feed in pond
Common in tanks and raceways What does a feed label tells us?
Fish farming utilizes prepared feeds. A feed that is produced by a
feed mill and then sold in bags or bulk. Required to have a label
approved by the state department of agriculture. What does a feed
label tells us?
Net weight Product name Brand name Guaranteed analysis Drug
additives What must the guaranteed analysis section contain?
Minimum % of crude protein Maximum & minimum % of protein from
non-protein nitrogen Minimum % of crude fat Maximum % of crude
fiber Minimum and maximum % of salt and calcium Minimum % of
phosphorus Other minerals Vitamin content What must be included on
label if feed has drugs in it?
The word medicated Purpose of medication must be stated. Directions
and precautions for medication. Listing of all active drug
ingredients. Review / Summary What are the parts of the fish
digestive system?
What are some common methods of feeding fish? What does a fish
label tell us? The End!