نشریه آبزیان زینتی
سال پنجم شماره 2 (تابستان 1397)

Today, ornamental fish farming and keeping is one of the most popular hobbies in around the world. Goldfish is as one of the most common ornamental fish in Iran. The presence of these fish in Haft-Sin is an old tradition that has long been common in Iran. This study aimed to investigate the biological characteristics of Goldfish and its breeding potentials in Iran. A review of the data showed that Goldfish has wide distribution in the inland waters of Iran. This species due to high tolerance to adverse environmental factors, attractive color and variety is as one of the most popular ornamental species in Iran and other parts of the world. This study can provide useful information about the biological characteristics of Goldfish, including distribution, nutrition, growth, reproduction etc.

With the development of the aquarium industry and an increase in enthusiasts to preserve ornamental aquatic animals, the hunting of wild ornamental shrimp species that live in nature in coral reefs has increased. Using harmful methods to catch these species has damaged the coral reefs. Increasing public awareness along with training different ornamental aquaculture techniques has a significant impact on environmental problems. Ornamental shrimp with attractive colors and unique morphology are at the forefront of many people.

The aquaculture industry has grown in recent years, and the proliferation and breeding of various types of ornamental fish have become widespread in aquarium conditions. Raising production and economic efficiency in aquaculture, proper nutrition, and the use of diets with the highest efficiency for reducing dietary intake and nutrition costs is essential. Among them, chloralhemic algae can be used as an appropriate supplement for the production of ornamental aquatic products. It will work Chlorella is used as a food for animals and humans and a food supplement in the pharmaceutical industry. In aquaculture and aquaculture industries, since the production of ornamental aquatic products is already an early task, and given the importance of food preparation in aquaculture, it is necessary to have a variety of foods that have a positive impact on the indices of production Like, growth, metabolism, vitality, and resistance to a variety of diseases. In the meantime, chlorella algae can play a role in proliferation, growth, immune system and fish survival because of the richness of proteins, vit This algae has about 30% protein, 15% fat, 30% carbohydrate and 5% minerals, and in suitable conditions, up to 50% of the dry weight of this algae is protein and 8.5% of it is fats. amins, essential amino acids, minerals, essential fatty acids, polysaccharides and carotenoids. In addition, because the most important attraction of the ornamental fish is their color and the fish are not normally able to synthesize the carotenoids needed to create the proper color in their own, they should be added with feed to fish feed, For this reason, chlorella algae is also useful as a source of pigment production and is widely used in the aquaculture industry as a nutritional supplement in nutrition management and nutrition management.

Hypothalamus and hypothesis are internal secretion glands that perform different functions. The physiology of these glands describes their functions and their distinct physiological functions. Physiology discusses how physiological functions are regulated and how these functions interconnect with each other so as to be able to perform in a single body as a unitary system. Hypothalamus controls all the hormone system of the body. Hypothesis, too, secrets several hormones that affect the performance of other internal glands and influence the whole system of hormones effectively. Hypothesis itself is regulated by the nervous system. Correct functioning of these two glands regulates functions influenced by hormones secreted by these glands.