jastog

Lobster Lobster is a marine crustacean arthropod of the crab family without large forceps (palinuridae). It can grow to a length of about 60 cm and weigh about 5 kg. It is long and the head has a large colorful tentacles that gather information about the environment. They are of dark reddish color, with hard and spiky clad armor ending in a tail fan. Pliers are small and used to gather food. It is mostly prevalent in places where the sea is clear, saltier and deeper. By day the lobster is hiding in rocky crevices at depths of 5-150 m, while during the moonlight it comes out in search of food. It feeds on algae, marine worms, other types of cancers and even carrion. This lobster's shell cannot expand and therefore they change it in certain periods in order to grow. When the shell becomes too soft, lobster sustains itself from eating and pulls into the hole which is beyond the reach of predators. The greatest enemies of the octopus and lobsters are large predatory fish such as triggerfish. Lobsters mate when the male and female have fully hardened armor. They reach sexual maturity between four and five years of age. Females are generally larger than males. They spawn during the winter months. Number of eggs that will be produced depends primarily on the size of the lobster and on the ambient temperature. The incubation of eggs, which are found throughout the body of the female lasts from 3-9 months, after which they hatch in a few days. Lobster larvae have 10 different stages of life. It lives as a larva for about half a year, and then takes the form of an adult cancer. Lobster meat is considered one of the best seafood delicacy. It is white and very tasty, rich in protein and carbohydrates. Therefore, the lobster is considered economically most important and mostly caught crustacean.

Jastog Jastog je morski člankonožac iz porodice rakova bez velikih kliješta (palinuridae). Može narasti do dužine od oko 60 cm i težine oko 5 kg. Duguljast je a pri glavi ima velika šarena ticala kojima prikuplja informacije o okolišu. Tamno crvenkastih je boja, oklopljen čvrstim i bodljikavim oklopom. Oklop završava repom lepezastog oblika. Kliješta su mu sitna i služe mu za prikupljanje hrane. Najviše je rasprostranjen najviše na mjestima gdje je more bistrije, slanije i dublje. Danju se jastog skriva u kamenitim procjepima na dubini od 5 do 150 m, a u vrijeme noćne mjesečine izlazi u potrazi za hranom. Hrani se algama, morskim crvima, drugim vrstama rakova pa čak i strvinama. Oklop jastoga se ne može širiti pa se zbog toga presvlače u određenim periodima kako bi mogli nesmetano rasti. Kad oklop postane previše mekan, jastog izbjegava hranjenje i povlači se u rupe u kojima je van domašaja predatora. Najveći neprijatelji jastoga su hobotnice te velike predatorske ribe poput kostoroga. Jastozi se pare kada i mužjaku i ženki potpuno otvrdne oklop. Spolnu zrelost dostižu između četvrte i pete godine života. Ženke su u pravilu veće od mužjaka. Mrijeste se tijekom zimskih mjeseci. Broj jajašaca koje će proizvesti ovisi prvenstveno o veličini jastoga a potom i o temperaturi okoliša. Vrijeme inkubacije jajašaca koja se cijelo vrijeme nalaze na tijelu ženke traje od 3 do 9 mjeseci nakon čega se mladunci izvaljuju nekoliko dana. Ličinka jastoga ima 10 različitih stadija života. Kao ličinka živi oko pola godine, a posljednji stadij razvoja je poprimanje oblika odraslog raka Meso jastoga se smatra jednom od najvećih morskih delikatesa. Bijelo je i vrlo ukusno, bogato bjelančevinama i ugljikohidratima. Zbog toga se jastog smatra gospodarski najvažnijom i najčešće lovljenom vrstom rakova.

Benthos