CATDOLL : CATDOLL: What harm does sword water flea do to shrimp?

1. What harm does sword water flea do to shrimp?

It is a good thing to have sword fleas in the fish tank, which means that the water quality is good and the water is rich in nutrients. It is not harmful to the fish and can be used as fish food. As long as there are many small fish in the tank, they will eat it up soon. Of course, if there are such things in the grass tank or shrimp tank, it still needs to be removed in time, otherwise it will cause harm to the shrimp. The removal method is the same as before, that is, put some small fish.

1. What to do if there are sword fleas in the fish tank

It is a good thing to have swordfish in the fish tank, which means the water quality is good and the water is rich in nutrients. It does not cause any harm to the fish and can also be used as fish food. As long as there are many small fish in the tank, they will eat it up soon. Of course, if there is such a thing in a grass tank or shrimp tank, it still needs to be removed in time, otherwise it will cause harm to the shrimp. The removal method is the same as before, which is to put some small fish.

2. Can sword water fleas be fed directly to grass goldfish?

Yes. Sword fleas can be directly fed to grass-fed goldfish, because grass-fed goldfish are very grass-fed goldfish, so it can be eaten in its original state, so sword fleas can be directly fed to grass-fed goldfish

No, the sword water fleas are predators, they will prey on fish, feeding them will harm them. No, the sword water fleas are predators, they will prey on fish, feeding them will harm them. No, the sword water fleas are predators, they will prey on fish, feeding them will harm them.

3. Are sword water fleas harmful to fish fry?

Sword fleas are harmful to fish fry. Fish fry do not need to be fed sword fleas, because if they cannot eat all of them at once, it will damage the water quality. Do not do it, as it will cause fish diseases or even death.

Cyclops is a genus of the family Cyclopsidae in the order Cyclopsidae. It is an important group of freshwater zooplankton. The female is generally about 1.5 mm long. The head and thorax are oval, with 5 free segments on the thorax, and the abdomen is slender with 4 distinct segments.

[Distribution] They live in the waters of ponds, lakes, etc. Some species (such as the near-sword water flea) can live in waters with high salt content and strong mineralization in addition to freshwater. They cannot survive in extremely barren water bodies with a pH of 3.2 to 4. Microscope photos The heroic sword water flea and the near-sword water flea are both common and abundant species in China's freshwater waters. In particular, the species that appear in the cold seasons of autumn and winter are important natural baits for freshwater fish.

[Fry] Also called "fish flower". Young lead fish that have just hatched, generally 6 to 9 mm long. There are artificially bred fry and natural fry from rivers.

[Starter feed] In order to ensure the survival rate of fish seedlings, it is often necessary to provide palatable, rich, and nutritionally complete starter feed in the early stage of breeding. The most commonly used starter feeds in the seedling cultivation process are egg yolk, soy milk, rotifers, algae, and aquatic microecological preparations.

There is no need to feed Daphnia to fry because they cannot be eaten all at once and will damage the water quality and cause fish diseases or death.

4. The growth environment of sword fleas

The growth environment of sword flea:

They live in the waters of ponds, lakes, etc. They are planktonic. Some species (such as the near-sword water flea) can live in waters with high salt content and strong mineralization in addition to freshwater. They cannot survive in extremely barren water bodies with a pH of 3.2 to 4. The heroic sword water flea and the near-sword water flea are both common and abundant species in China's freshwater waters. In particular, the species that appear in the cold seasons of autumn and winter are important natural baits for freshwater fish.

The details are as follows:

1. Introduction to Cyclops

Cyclops is a genus of the family Cyclopoidae in the order Cyclopoidea. It is an important group of freshwater zooplankton. The female body length is generally about 1.5 mm. The cephalothorax is oval, with 5 free segments on the thorax, and the abdomen is slender with 4 distinct segments. There are longitudinal ridges on the back of the caudal fork, and a row of bristles on the inner edge. The first antenna has 14 to 17 segments (rarely 18 segments), and the lateral margins of the last 3 segments have a row of small spines. The inner and outer branches of the first to fourth thoracic legs are divided into 3 segments. The fifth thoracic leg has 2 segments, and its base segment is clearly separated from the 5 thoracic segments. There is a long feather-like bristle attached to the outer terminal horn, and the terminal segment is relatively long, with small spines on the surface. There is a strong spine in the middle or near the terminal part of the inner edge, and a long feather-like bristle attached to the terminal edge. The spermatophore is generally round.

2. Geographical Distribution

Sword fleas are widely distributed around the world and are found in various types of waters such as oceans, reservoirs, lakes, ponds, and rivers; they can even be found in mosses, moist tree bark, water in tree holes, and in the leaf axils of tropical plants.

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Main categories

Among the existing species in China, there are 17 world species, 16 Northern Paleozoic species, and 30 Oriental species.

In biology, it is divided into the following categories according to different classification methods.

1. Classification of Cyclops by habitat location

⑴ Lives at the bottom of water, such as Pseudocyptia fuscata;

⑵Living in the open water zone of lakes, such as Cyclops, Middle Cyclops, and Warm Cyclops;

⑶ Commonly found in ponds, such as the widespread middle sword water flea and transparent warm sword water flea;

⑷ Likes to live in coastal water grasses or algae, such as the close relatives of the pseudo-cyclops, the pectoral-ornamented exocyclops, and the bicolor small cyclops:

⑸ Living in groundwater, such as burrowing true sword water fleas in well water;

⑹ Lives in caves, such as cave sword fleas and Gray sword fleas, but these two genera have not been found in China;

⑺ Lives in the leaf axils of higher terrestrial plants, such as the sword water flea on bromeliads.

⑻ Lives in stagnant water, such as the Bogota sword flea.

2. Classification by altitude of their habitat

⑴ Species that are only distributed at an altitude of about 4,000 meters, such as the Tibetan sword flea and the Ladakh sword flea;

(2) Species distributed from plains or hundreds of meters to three or four thousand meters, such as the saw-edged true sword water flea, white big sword water flea, near sword water flea, heroic sword water flea;

⑶ Species distributed at about 1 km or from the plain to about 1 km, such as the brown giant sword water flea, the forked-legged sword water flea, the hairy sword water flea, and the widespread middle sword water flea;

⑷ Except for the above three categories, most of the species growing on plains belong to this category.

3. Classification according to their adaptability to temperature

⑴ Wide-temperature adaptation: This species has a wide range of adaptability to water temperature changes. There are many eurythermal species with worldwide distribution that can be seen all year round. Representatives include the widespread middle sword water flea, the adjacent sword water flea, and the hairy pseudo-sword water flea. These sword water fleas are more common in spring and autumn.

⑵ Stenothermic: This species is only adapted to certain temperature conditions, and can be divided into two categories: psychrophilic and thermophilic. Psychrophilic stenothermic species are roughly equivalent to northern species or species that only appear in winter, such as burrowing true sword water fleas; while thermophilic stenothermic species are roughly equivalent to southern species or species that only appear in warm seasons, such as common near sword water fleas and sand-dwelling sword water fleas.

4. Classification by food habits

⑴ Filter feeding type: mainly feed on suspended particles such as algae, bacteria, protozoa and organic debris in the water, mostly herbivorous animals, and its representative species include Serrata serrata and Long-tailed Serrata serrata;

⑵ Predatory type: They mainly feed on earthworms, cladocerans and other copepods. More than 70% of the contents in their intestines are animal food, and most of the herbivorous food is separated from the herbivorous animals that have been eaten. This type of sword water flea is mostly carnivorous, including the near-neighbor sword water flea, the white sword water flea, and the widespread sword water flea;

⑶ Scraping type: This type of sword water fleas mostly crawl along the bottom of the water to feed on algae, protozoa, rotifers, food debris and animal carcasses. Such as the bicolor small sword water flea and the large tail true sword water flea.

It can be said that sword fleas are a type of crustacean copepod zooplankton with a wide distribution, complex diet, and the ability to adapt to a variety of living environments. It is precisely because of its wide distribution that it has become a representative of zooplankton in water sources.