"What is Argentine squid?"

Argentine squid, also known as Argentine squid. Cephalopoda, family Cichlidae. The body is conical in shape. There is no membrane outside the orbit. The shallow hole in the front of the funnel-shaped depression does not have longitudinal folds and edge sacs, and is in a lubricating state. The fin angle is about 45 °, and the two fins are slightly connected in a horizontal diamond shape. The length of the flesh fin is about 1/3 of the body length. The length of the wrist without a handle is usually 3 ˃ two ˃ four ˃ 1. There are two rows of suction cups, with a large pointed tooth on the keratin ring and more than 10 nearly semi-circular teeth around it. The fourth pair of wrist stemnesis on the right or left side of male Argentine squid. The Argentine squid has four rows of suction cups in the middle of the tentacle, with a large keratin ring in the middle and semi-circular teeth, and eight rows of small suction cups at the top. Record the maximum body length of 0.33m and the maximum weight gain of 1kg. Mainly distributed on the southwestern Atlantic continental shelf and slopes, it has been extensively developed by fishing vessels from countries such as Japan, South Korea, China, and Argentina, with a maximum annual production of 1 million tons in the producing countries. For fresh food and can also be made into dried products

The Argentine squid has a cone-shaped body and a noticeably thin and narrow back, with a body length of about 4 times its width. The widest part is located in the middle of the jacket, which has strong muscles and a nearly circular pigmented spot of varying sizes on the surface. The funnel-shaped shallow hole does not have longitudinal folds or edge sacs, and is completely smooth. The two fins of Argentine squid are slightly rhombic in shape, with short and wide fins, accounting for 42% of the body length and 57% of the body length, and a single fin angle of 45 ° -55 °. The Argentine squid has four rows of suction cups on the wrist, with a large center and a small edge. The fingers have eight rows of small suction cups, and the inner keratin ring of the large suction cup in the middle of the palm has semi-circular teeth. The lengths of each wrist are similar, and wrist movements are generally 3 ˃ two ˃ four ˃ 1. The second and third wrists of males are significantly thicker than those of females, and the suction cups are also significantly enlarged. The suction cups are arranged in two rows, and the keratin ring has a large pointed tooth surrounded by 10 semi-circular teeth. Male's right or left fourth wrist distal 1/2 is ossified, and the suction cup is specialized into two rows of mastoid processes. The inner shell of Argentine squid is keratinized, narrow in shape, with a thin central axis and thick ribs, and a hollow narrow rhombic caudal vertebra at the back. Argentine squid is distributed on the southwestern Atlantic continental shelf slope at 22 ° -54 ° S.

Argentine squid is a shallow sea species that inhabits the surface of the ocean at depths up to 800 meters. In autumn and winter, it is densely populated on the continental shelf at depths of 50-200 meters. The life cycle of Argentine squid is 1-2 years. Mainly feeds on crustaceans, fish, and cephalopods. Crustaceans include sauropod beetles, armored shrimp, krill, and hairy jaw beetles; Fish mainly include juvenile cod, lantern fish, etc; The cephalopods mainly include Argentine squid and Patagonian squid. Cephalopods are more important in the diet of larger individuals, and they themselves serve as prey for carnivorous fish, marine mammals, and seabirds.

The population structure of Argentine squid is quite complex. According to the spawning time, growth rate, and spatiotemporal distribution of juvenile squid, they can be divided into four spawning groups: spring, summer, autumn, and winter. The spawning period of Argentine squid runs throughout the year, with its peak in winter (May August). Argentine squid can be divided into four groups based on their body size, mature body length, and spatiotemporal distribution of spawning grounds: the southern Patagonian population, the northern Buenos Aires Patagonian population, the summer spawning group, and the spring spawning group.

Argentine squid is an important economic species, with particularly abundant resources at 35 ° -52 ° S. It is currently one of the most important resources in the world's cephalopods. The main fishing grounds include: 1. Continental shelves and shelf slopes in the Argentine/Uruguayan common waters from 35 ° -40 ° S; 2. The North Patagonian continental shelf is located between 42 ° -44 ° S, with a depth of approximately 100m, and the operation period is from December to February of the following year; 3. The continental shelf slope at 42 ° -44 ° S operates from December to September, but mostly between December and July. 4. The Malvinas Islands have a fishing season from February to July, but mainly from March to June. 5. The Southwest Atlantic is one of the important fishing areas in the world that produces cephalopods