 |
| Fish Scales |
Fish Scales
Beauty of fish scales
The Fish Scales are absolutely beautiful. There, it is said they are often out of sight, well camouflaged and beneath the surface, so it is sometimes difficult to appreciate their beauty. It is for this reason that we have chosen to see these stunning beauties up close and appreciate them for their beauty.
Brook trout
Our most colorful freshwater fish, the Brook Trout scales, are striking when you look. Most at high altitudes live in small flowing rivers, their susceptibility to pollution where they can survive. The range of East Brook trout ranges from green to brown, with light shoots at the top and red spots with blue outlines. Their lower wings are dark red and sport a white outline.
Rainbow trout
Rainbow trout are easily identified by the broad red band or "rainbow" that runs from head to tail towards them. The band of red is mixed in a dark olive green on the back and pure white or silver on the belly. The back, dorsal fin and tail are liberally trimmed with black spots. The brightness of the color varies where the rainbow trout lives and what it eats. For them see the major trout waters that are clear, clean and cold.
Dolly warden
The Dolly Warden Char (doll for short) is probably the strongest of the four species. When migrating, they are usually dark green on the back, having silver sides and white on the bottom. Male and female dolly wardens can exhibit a wide variety of color combinations before producing them, as they color in their full color, they are all very beautiful.
Sockeye salmon
Showing a beautiful and shimmering silver, while at sea, they change color when they cross back into the freshwater. When adults prepare for a hockey spawn they usually turn a vibrant red with a green head, so they are commonly called "red" salmon in Alaska.
Florida Gar
Not only beautiful, but attractive, Gars has ganoid scales. These scales are mainly made of gonoin, which is closely related to the enamel in our teeth! Recent research combines the two evolutionaries, and also helps to explain why the scales are so rigid and rigid.
Bluegill
Bluegill is a medium size large fish and gets its name from the large blue spot behind its gill. Another feature that helps identify this species is the uniformly dark stripes on its back. Bluegill can easily adapt to different water bodies but prefers lakes or slow moving streams. They are most active in the morning.
Read More: Fish Scales - Beauty of fish scales
To keep them wet
Fish are famous for the texture of their scales, but they are disgusting for a reason! Fish scales are covered in a mucus coating to protect them from fungus and external parasites. If you plan to catch, releasing a fish, wet your hands first to make sure the fish helps retain its mud coat.
An entire movement occurs to reduce stress on fishing when they encourage anglers to "keep wet", or to keep fish in the water. By doing this, you ensure that you are leaving the fish in the best condition.
Scale, in zoology, small plate or shield with part of the outer skin layers of some animals. Scales provide protection from the environment and from predators. The bone of the fish scales is formed from a deep, or dermal, skin layer.
Elasmobranchs (eg, sharks) have placoid scales, which are bony, shiny projections with an enamel-like mantle. Ganoid scales, which are found on fishes such as gars and boatfins, are similar to placoid scales, but are covered with a strange enamel-like substance called ganoin. It is believed that true teeth developed from placoid scales. Advanced fish have either cycloid scales (eg, carp) or catenoid scales (eg, perch; sunfish). These are typical overlapping fish scales. Cycloid scales are large, thin and round or oval in shape, and they exhibit growth rings. Catenoid scales resemble cycloid scales but have comb teeth on their overlapping edges.
Upper, or epidermal, horny scutes or corneosectes protruding from the skin layer, appear in reptiles and birds' feet. In crocodiles and some lizards, bony dermal scales (ostoderms) pass through the outer scales. The wings of the bird are evolutionarily modified epidermal scales. Modified epidermal tissue, mostly composed of keratin, forms the crustal surface found on some mammals (eg, mice; pangolins); Although mammalian hair is also largely keratin, it is not a modified scale.
If you have ever been to a fish market,
If you have ever been to a fish market, or caught your own fish, you would know that fish have scales, small almost plastic flakes that cover their bodies. Most fish have scales, but not all. Scales affect the life of fishes through the cost of their manufacture, restrictions on the movement of bodies they supply and through conservation. Larger, heavier scales provide more protection, but limit movement, smaller, lighter scales provide less protection but allow more freedom of movement, thus in the common eel, Anguilla angilla, the scales are subtle.
Cyclostomes (hagfish and lampreys) have no scale. However fossil evidence suggests that his ancestors had some. Cartilaginous fish and bony fish develop differently. The scales of sharks and rays are made of bone and resemble teeth, as they have a soft central area called the pulp, a middle layer of dentin and a fine outer layer of enamel. These scales are called dentin and are described as 'placoid', they spread through the epidermis and are not completely covered by it.
Such scales have a fixed shape and do not grow with the animal. Instead when the animal grows open a large enough space between two or more dentures grows to fill a new space. The scales / denticles of cartilaginous fish are discrete, they do not overlap as scales of bony fishes.
In the images below, the portion of the scale shown is embedded in the fish's skin as colored orange (although in reality it is not colored that way) and the part we see as colored gray . In addition to the placoid scales of sharks and rays, fish scales are mostly flat and thin, they fit flat envelopes in the skin, so there is no need for side view as shown in the placoid image below.
In most sharks, a repeating diamond
In most sharks, a repeating diamond pattern is arranged, the shark has a thick fibrous dermis (the part of the skin that lies beneath the epidermis), which supports the scales and protects the animal. helps. Other cartilaginous fishes that swim like sharks, such as guitar-fish (Rhinobatidae) and saw-fish (Pristidae), also have a full mantle of denticles.
However, species that are dorso-ventrally flattened such that the rays have very little dentition. In skates (Rajidae) they are scattered in pectoral and patches on the head. In eagle ridge (Myliobatidae) they are very few in number and in electric rays (torpedidae) they are absent except for the modified form of the tail spine. Devil-fish (Mobulidae) has none.
The scales of bony fishes evolved a long time ago and they had four layers in their ancient form, a dense bone, a spongy bone, a dentine, and an enamel. Such scales are called 'cosmoids' and they exist only in the modern world as siolocanth (Latimeria chalumne) or fossils.
The scales of the remaining bony fishes have only two layers, a cool one and a fibrous one. They come in two main types 'ganoid' and 'elasmoid'. Gnoid scales are derived from cosmoid scales and are evolutionary old-fashioned and found on birch, gar-fish, sturgeon and reedfish. They are rigid solid scales.
The most common form of scale
The most common form of scale is the almasoid scale. This is the thinnest plate you find on most fish. It is often described as coming in two forms, the 'catenoid', which consists of a set of fine teeth on the trailing edge, and 'cycloids' that are rounded only on the outer / posterior edge. However, there are intermediate forms and both these words are really only adjectives that represent the vertices of a continuum.
A fish's scales can all have one type, the perch has catenoid scales, while the flock, mino, and trout all have cyclic scales, or both types of scales are found on the same fish, C. leaflet (Epinephelus sp.). Can go Above the lateral line are mostly the catenoid scale and the cycloid below, while the Dab (Limanda sp.) Is the catenoid scale on the upper surface and the cycloid scale on the lower white surface.
Not all fish have flakes, some species such as sun-fish (mola mola) and siluroide (naked catfish) have none. Like other species, common eels have no scales, but they actually have microscopic scales that are deeply intertwined in their dermis. Even those fish that have scales do not always cover the entire body.
The size and distribution of scales on the body of a fish is often, but not always, a way of living. Thus fish that swim quickly, or that live in fast flowing waters (trout, tuna, etc.), have smaller scales, while fish that swim slowly in slow water have larger scales, namely Carp.
In some S. American catfish the scales
In some S. American catfish the scales have been changed to bony plates to make armor, the same situation in C. horse and pipe fish. In these cases additional protection is afforded by reducing extra flexibility and speed. Some fish are reduced in size from head to tail, indicating the need for more flexibility in the tail of the fish.
While the scales of tuni (Thunnus sp) and mackerel (Sombar sp) are very small, and the common (Atlantic) eel (Anguilla anguilla) is microscopic, other species of fish are much larger. Masses of tarpon (Megalops sp) often reach 5 cm (2 in) in diameter which are sometimes formed in ornaments, and scale of Mahaser (Borbus sp) of India exceeds 7 cm (3 in) in diameter. Can occur.
The scales of modern fishes develop inside and out, are dermis and are completely covered by the epidermis. They grow as fish, thus, in many cases, they reflect the life history of the fish. Experts of scale patterns can tell you not only how old a fish is with its scales, but also how often it has awakened and if it has become seriously ill.
Most fish are shallow in dummies and overlap like tiles on the roof, allowing them to be easily removed (eg herring pilders and sardines), but in other species such as plas they are more deeply embedded and overlap Are not.
Comments
Post a Comment