Digestive System in Fishes (With Diagram)

A. Digestive System

IX. Metabolism
The minerals also carry out many supportive functions. Bile has a digestive function in that it emulsifies lipids, greatly increasing their absorbtion in the intestine. In salmonids the pancreas is a diffuse collection of cells interwoven amongst the pyloric caecae. All have a mouth, oesophagus throat , and areas for the absorption of food components fore and midgut and compaction of indigestible waste material hindgut. Often, popular bottom-dwelling fishes such as loricariids and Corydoras catfish are expected to survive on the leftovers from the other fish. While they are alternate sources of energy, they are not very necessary for fish growth. Commercial frozen feeds such as brine shrimp, bloodworms, mysids, glassworms, etc, should be discarded after 1 yr.

The digestive system

Understanding feeding and digestion in fish.

In contrast, feeding flaked feed to a large fish like an oscar or other cichlid will result in a messy tank, because larger fish cannot easily ingest enough flaked feed to meet their requirements. When feeding a mixed population of fishes, as is typical in hobbyist tanks, several types of feed items may be required to meet the needs of the fishes.

Often, popular bottom-dwelling fishes such as loricariids and Corydoras catfish are expected to survive on the leftovers from the other fish. This is not an acceptable practice, and these fish should receive targeted feeding. Another consideration is quantity of feed fed. Various types of feeds have dramatically different weights. For example, flaked feeds tend to be much lighter than pelleted feeds.

Pelleted feeds come in different sizes and can be floating or sinking. Most aquarium fishes should be fed at least daily, except for carnivorous fish that ingest large meals. These may be fed once or twice a week. Careful attention must be paid to storage of feeds. Fish feeds usually have a high protein and oil content, which can deteriorate rapidly. Dry feeds should be kept in a pest-proof container and in an area of low humidity and temperature. High humidity and high temperature result in degradation of the diet, promotion of mold growth and potential mycotoxin production, and rancidity.

Besides, they also need a variety of nutrients, which can be provided only by rotating the feed. Many fish species love worms, insect larvae etcetera and will stay much healthier when provided with live food. Care must however be taken to ensure that these food varieties do not carry infections, such as germs or other parasites, in them. This is very difficult to ascertain, unless you culture your own live food. So beware when you feed live food to your fish. Food for the fish has to encompass a large number of nutrients.

All these together make your fish healthy and able to adapt to changing conditions in the aquarium. Remember, the healthier the fish, the more resistance will they have to disease and infections. Didn't find the info you were looking for? Register for free and ask your question in our Aquarium forum! Our knowledgeable staff usually responds to any question within 24 hours. Alternative fish Foods - Information about suitable fish foods you can buy in your grocery store.

Brine Shrimp Hatchery - How to make a simple plastic bottle brine shrimp hatchery, in pictures. Choosing food for and Feeding Fry - An introduction to feeding fry. Cultivation of some common live food - A guide about how you can cultivate some common types of live food in your home. Culturing Microworms - An article on this useful live food for fry and small fish. Feeding fish - An article about feeding fish and which factors that stimulate fish to eat.

Fish feeding habits - An introduction to the different feeding habits different types of fish have. Fish food — an introduction - A comprehensive discussion of fish foods. Growing adult Brine shrimp - how to grow adult Brine shrimp Microworms - Microworms are easy to cultivate and are excellent live food for small fish or growing fry.

Raising and Growing Large Brine Shrimp - How to build a brine shrimp hatchery, and how to feed and grow the shrimps. Raising Daphnia - How to culture and use daphnia.

Raising mealworms for animal food - Yellow mealworm larvae or adults serve as food for fish, reptiles, birds and other animals Raising Vinegar Eels - How to culture this easy and inexpensive live food. Combined Worm Culture - Grindal worms and red worms can be cultured in one container together, thus providing live food for different sizes fish Tropical fish food - An introduction to fish food for beginners.

Types of fish food - A guide to the basic types of fish food available. Feeding your fish vegetables - Fresh cooked high fibre vegetables benefit the digestive systems of many fish. Protein and fish Protein is the single most important nutrient that the fish needs to grow.

On a dry-weight basis, this makes up the maximum weight in their body structure. Amino acids are derived from proteins and the fish uses them to make new body tissues as well as enzymes.

Fish are very adept at converting food to body tissues. Please accept our apologies for any inconvenience this may cause. Add to Wish List. Toggle navigation Additional Book Information. Description Table of Contents. Summary Understanding the biology of the innumerable number of aquatic species on our planet is the focus of sustained research efforts.

Environmental degradation, management or rehabilitation of wild stocks, and the forecasted climatic changes are fueling interest in the study of the ecology, feeding behavior, and nutrition of aquatic animals in their natural habitat.

In parallel, the rapid expansion of aquaculture in many parts of the world has supported vigorous research programs on nutrition, and feeding of cultivated aquatic organisms. More than aquatic species are cultivated on a commercial scale using a wide variety of production systems.

This great diversity results in great opportunities and tremendous challenges. Topics covered in this book are as diverse as, feeding ecology of fish in their natural habitat, feeding behavior, digestive anatomy, biochemistry and physiology of different fish species at different life stages, the impact of diet on gastro-intestinal development and health, nutrition and disease resistance, and modeling conversion of food or feed inputs into biomass.

1st Edition