Electrical means of protection of marine life – from whom are they protected and how the water in the fish forms the electric current today, we will talk. What threatens such marine life that Nature has given them an amazing gift to beat the enemy shock? Many, probably, have heard about the amazing tool of self-defense from the rays. Guess?
Electrical means of protection of marine life – stingrays
Yes, we now talk about electric rays. They are spread quite widely, lived in almost all warm seas, sometimes swim in the Black sea. Just distinguish the 40 species of electric rays, from tiny (length 12-15 cm including the tail) to giants 2 m in length and weighing 100 kg. of the Most famous view — marble scat, Latin for “torpedo of Marmorata” — gave his name formidable naval weapon, the torpedo.
Unlike many other stingrays and manta rays, electric — bad swimmers. The pectoral fins have small, tail short and broad, with a small blade on the end. Typically, the ramp lies at the bottom, in the silt or sand, waiting for prey. She is to appear next, and a few short, but strong discharges stun the victim.
Manta rays are capable of electric shock to kill fish weighing 2-3 kg. Sharks and other enemies also have bad voltage during the discharge reaches 200-300 volt(typical home electrical outlet voltage 220 volts), and such attacks Stingray can produce up to 30 in a row. Continue reading
In the Adriatic sea, Montenegro is home to over 35 different species of fish :
Dorada is the most popular fish in the Mediterranean since times of antiquity. In ancient Rome Dorado to propagate in captivity could not, therefore, caught in the sea young fish and fattened in special pools with sea water. Considered the most delicious Dorado caught in the period July to October. Can reach a length of 70 cm Dorada is not accidentally considered the most exquisite fish delicacies. Its dense white meat has a unique aroma and contains few bones, so cooking is in great demand. Since Dorada feels good too in relatively clean water near the coasts and well propagated, it is often bred in the lagoons and bays of the seas of the Mediterranean basin, in particular in the Adriatic and around its Islands. Breeding marine fish Dorada actively foraged and Montenegro – in particular Boko-Kotor Bay.
Sometimes weighs up to 500 kg and can be longer than 4. 4.5 m. The nose of this fish in the form of an acute corneous process. It is a blue Marlin at the Ernest Hemingway story “the old Man and the sea” tried to catch the main character. Continue reading
The causative agent in fast-flowing water persists for long (in hours). Its virulence is low, as it usually causes disease in immunocompromised fish spawning. After amplification of their virulence by passaging in the body is weakened fish it causes disease in a large number of fish in the form of epizootic outbreaks.
Ehpizootologicheskaja data. Disease in pikes usually occurs within a few days after spawning (March – April). The most susceptible Mature individuals. The perch, bream, roach and burbot the disease recorded in the summer. The emergence of the disease contributes to cold spring, especially during the spawning period of pike. Then the flash increases and reaches maximum development during the summer months. It fades by the end of summer,
Epizootic process can continue in a large body of water (reservoir, lake) for several years and spread to other reservoirs-current water with transportable or migratory fish. The source of infection are sick and dead fish, microbiological. They are contagious from the beginning falls into the water with secretions, or the decomposition of corpses. Most researchers believe that infection occurs via povrezhdeniya the skin, mucous membranes, intestines. Continue reading