In the history of terrestrial animals, few events are more significant than the first time a fish stepped onto land.
With the help of artificial fish-swarm algorithm (AFSA), it optimizes the projection index function, seeks for the optimal projection direction, and improves AFSA with the application of self-adaptive artificial fish step and crowding factor.
This paper tries to apply for AFSA to optimize projection pursuit, introducing self-adaptive artificial fish step and crowding factor to improve AFSA and overcome the defect of being caught in partial optima.
It is possible that, in fish, some steps of the pathways involved in TSD and GSD are similar.
Activists and environmental organizations are calling for new measures to prevent illegal fishing, including steps to make vessels -- and tuna fish -- more traceable, at a week-long meeting of the International Commission for the Conservation of Atlantic Tunas, which began Monday in Cape Town.
Law apart, UNESCO is looking for action: more boats and patrols to curb fishing, active steps to cull introduced species.
The first fish that stepped onto land more than 350 million years ago wasn't a fluke.
The team observed a few fish taking alternating steps with their rear fins along the bottom of a test aquarium or pushing off with both rear fins at the same time in a hopping motion.
Other auxiliary works are systems for evacuating or flushing out silt that accumulates in the reservoir, locks for permitting the passage of ships through or around the dam site, and fish ladders (graduated steps) and other devices to assist fish seeking to swim past or around a dam.
Anyone who doubts that meat can be so visually, viscerally stunning as fish, need only step into the butcher's hall in the Agora, Athens's central market.
His great-grandfathers were fishermen 110 years ago; his semi-retired father left the sea in 2003 yet still repairs and recycles fishing nets just steps from Whyte's boat.
