Cynoscion regalis
| Cynoscion regalis | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
.jpg)
Cynoscion regalis |
||||||||||||
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Cynoscion regalis | ||||||||||||
| ( Bloch & Schneider , 1801) | ||||||||||||
Cynoscion regalis is a umber fish of the open water, i.e. without any closer relationship to the seabed, like the eagle fish . The scientific name seems to mean "royal dog shadow". From Nova Scotia to Florida it occurs everywhere on the East American coast as an important migratory commercial and sport fish, but its population is subject to strong fluctuations because it dies at 5 ° C andsometimes cannot dodgeadvances of the Labrador Current quickly enough. There are around 25 related species in large parts of the ocean.
description
In his home country it was called skwiteg (squeteague) by the Algonquians , weekvis by the Dutch and weakfish by the British - which is justified by the fact that its mouth parts are so weak that a fish that has a fish hook in its area can often get loose by tearing the skin and jawbones apart when trying to land the fish. However, other names are also “lake”, “gray” or “sand trout” - despite the D1 that cannot be overlooked (which is of course less conspicuous than that of many benthic species). Its mouth is uppermost (a rarity among the Umbers); the teeth are very weak, it has no dog-teeth like an eagle fish. He doesn't have a Bartel . It can be over 1 m long and weigh almost 9 kg. The color is essentially a silvery olive green, with all sorts of delicate points and lines and a bluish or purple sheen.
Fin formula : D1 X, D2 I / 25-29, A II / 10-13.
Habitat and way of life
The fish never stray far from the substrate (preferably a sandy bottom, up to a depth of 300 m). He hunts socially on the surface of the water or on the bottom - wherever food is available. The sounds produced are functionally diverse; it seems that there are also pharyngeal bite noises, which are also amplified by the swim bladder. They are not only used to find the sexes for spawning, but also to coordinate migration behavior. The fish can become sexually mature with a length of 14 cm (♂) or 18 cm (♀), so under certain circumstances already at the end of the first year of life; on average they live to be around 10 (maximum 17) years old. They spawn repeated times in March through August. The young often form dense swarms at the bottom in bays, even in brackish water , but do not penetrate rivers. Their food consists initially (in summer) of plankton, then in autumn of benthos; But crabs and shrimp he turns increasingly to fish: Opisthonema (herring), Anchoa (Sardine) Brevoortia , Ammodytes , Platichthys (juvenile plaice) u. a.
literature
- Henry Bryant Bigelow William C. Schroeder (term): The fishes of the Gulf of Maine. 3rd ed. Smithsonian Institute, Washington, DC 2002. ISBN 1-56098-951-3 (EA 1953)
Web link
- Cynoscion regalis on Fishbase.org (English)