Search results
Results from the WOW.Com Content Network
The kype is the hook on the lower jaw which some salmonids develop before the breeding season. A kype is a hook-like secondary sex characteristic which develops at the distal tip of the lower jaw in some male salmonids prior to the spawning season. [1] [2] The structure usually develops in the weeks prior to, and during, migration to the ...
The bent molecule H 2 O has a net dipole. The two bond dipoles do not cancel. The overall dipole moment of a molecule may be approximated as a vector sum of bond dipole moments. As a vector sum it depends on the relative orientation of the bonds, so that from the dipole moment information can be deduced about the molecular geometry.
Fishermen use a box-shaped trap called a pot, which consists of a steel frame covered with a nylon mesh. Each pot weighs 600–800 lb (270–360 kg) and a ship may carry 150 to 300 pots. [6] Fish, usually herring or codfish, are placed inside as bait, and then the pot is sunk to the sea floor where the king crabs reside. The pots are dropped in ...
The recruitment problem is the problem of predicting the number of fish larvae in one season that will survive and become juvenile fish in the next season. It has been called "the central problem of fish population dynamics" [14] and “the major problem in fisheries science". [15]
The IOD involves an aperiodic oscillation of sea-surface temperatures (SST), between "positive", "neutral" and "negative" phases. A positive phase sees greater-than-average sea-surface temperatures and greater precipitation in the western Indian Ocean region, [dubious – discuss] with a corresponding cooling of waters in the eastern Indian Ocean—which tends to cause droughts in adjacent ...
It is a silvery fish which resembles trout of the family Salmonidae [3] and lacks the pink or orange coloured fins of many of its congeners. They can grow to up to 4 kg (8.8 lb) in weight [4] and 47 cm (19 in) in total length [2] The larger adults are plain coloured while the juveniles have vertical dark bars along the body which they lose as they grow.
Siganus fuscescens is a schooling species and is a mostly diurnal fish. The juveniles have a diet dominated by filamentous algae while the adults prefer leafy algae and sea grass. [ 2 ] When they arrive on coral reef flats, the larvae aggregate in schools with a normal size of 200 individuals, but may hold as many as 5,000.
At a small tilt angle, the lift is greater for flat fish than it is for fish with narrow bodies. Narrow-bodied fish use their fins as hydrofoils while their bodies remain horizontal. In sharks, the heterocercal tail shape drives water downward, creating a counteracting upward force while thrusting the shark forward.