Differences of Tuna, Skipjack

Tuna fish are very similar to tuna and almost the same. It is true that tuna is another type of tuna

Skipjack tuna is also classified as tuna, other names of which are cakalan, cakang, kausa, kambojo, karamojo, turingan, and some are called cob. Tuna is a marine fish composed of several species of the Scombridae family, especially the Thunnus genus. This fish is a reliable swimmer (once measured reaches 77 km / h). Unlike most fish that have white meat, tuna is pink to deep red. This is because the tuna muscle contains more myoglobin than other fish. Some of the larger tuna species, such as bluefin tuna (Thunnus thynnus), can raise their blood temperature above water temperature with their muscle activity. This causes them to live in colder water and can survive in diverse conditions. Most large bodied, tuna is a fish that has high commercial value.Tuna has a body shape that is somewhat similar to a torpedo, called fusiform, slightly flattened on its sides and with a tapered muzzle. Dorsal dorsal two bundles, the first dorsal fin is relatively small and separated from the second dorsal fin. Behind the dorsal fin and anal fin (anal) there is a row of additional small fins called the finlet. The deep-brimmed tail fin with the supporting fingers covers the entire hipural end. On both sides of the tail rods each have two small sized hulls; which in some species flank one bigger side off. Most of the body with the body barut region (corselet), namely the back of the head and around the pectoral fins are covered by thick and rather large scales. The rest of the body scaly small or without scales. Spine (vertebrae) between 31-66 pieces.

The remarkable aspect of tuna physiology is its ability to keep the body temperature higher than the ambient temperature. For example, bluefin tuna can maintain body temperature of 75-95 ° F (24-35 ° C), in cold water at 43 ° F (6 ° C). However, unlike endothermic creatures such as mammals and birds, tuna can not maintain temperatures in a relatively narrow range.
Tuna is able to do so by generating heat through metabolic processes. Rete mirabile, a network of veins and arteries located on the periphery of the body, transfer heat from the venous blood to the arterial blood. This will reduce the cooling of the body surface and keep the muscles warm. This causes the tuna to swim faster with less energy