PARGA » Umbrina canosai
Skinless snapper fillets few thorns
Other common names in Latin America
Brazil: Castanha, Chora Chora.
Common name in English: Argentine croaker
External distinguishing characteristics:
Body short and high, compressed. Profile strongly convex upper and lower almost straight. Covered with scales ctenoideas obvious. Lateral line quite twisty in its beginning, it becomes straight from the fourth level of the radius of the anal fin. Ends on flow. Head contained 3 1 / 2 to 4 times in total length. Rounded snout with 8 pores on the ventral. Presents one chin chin, thick, short and rhomboid. Mouth small, horizontal, slightly inferred, the ends do not exceed the level of the rear edge of the eyes. Nares pairs near the eyes. Operculum membranous margin, with two points lamellar.
Dorsal split, the espinosa earlier and later, with a spine and soft rays. Truncated flow. Anal short two bones, the first well clear. The pectorals are small, start behind operculum and below half the flanks. The ventral born at the height of the base the pectorals are shorter than this. Coloring. Golden yellow flanks and back, with striae oblique darker clarify the ventral area. Ventral and anal fins white, the Other golden yellow.
Distinction of similar species in the air:
It is very similar to the golden croaker, which can be distinguished because the snapper is only one barbillón mental and body higher.
Size:
The maximum size is close to 43 cm in length. The most frequently landed range between 23 and 38 cm.
Other biological data:
These fish can be considered members of the benthic community. During play the winter months, in areas north of Mar del Plata. Males and females migrate the south after the start, but while they seem to make this shift in successive layers, as short finish spawning, males do not move until a longer period of spawning, so only after the reproductive season check similar proportions of both sexes in the habitat trophic summer. Individuals caught in the area of Mar del Plata (August to February) are resting gonodal. The larva of 10 mm meristic has all the characters as adults, but differs in that head height is larger, with big eyes and pigments.
The diet consists of benthic organisms: anélicdos polychaetes, molluscs bivaldos, ofiuros and crustaceans (amphipods, isopods, shrimp, crabs, etc.).
The oldest observed in this species was 20 years.
Geographical distribution and behavior:
Inhabits coastal waters (generally less than 40 m) of the South Atlantic, between the approximate limits of Rio de Janeiro (Brazil) and the Northern Gulf San Matías (Argentina). No enters the estuarine region of the Rio de la Plata.
Perform regular migration Río Grande del Sur, Brazil, where he plays and passes the winter, and Uruguayan coastal platforms and Argentine, which arrives in late spring – summer to feed.
