جريدة الجمهور نبض الشعب وقلب الحقيقة
Predator-target connections reference the new relations between two varieties in which one to varieties is the hunted food source for one other. The brand new organism that feeds is named the brand new predator while the system which is provided up on ‘s the sufferer.
You’ll find virtually hundreds of types of predator-prey affairs. Several may be the lion-zebra, bear-salmon, and you will fox-bunny. A herb is also sufferer. Holds, eg, feast upon fresh fruits, a bunny feeds for the lettuce, and a beneficial grasshopper feeds on the renders.
Predators and you may prey exists certainly even the easiest lifetime forms with the Earth, single-celled organisms named micro-organisms. Brand new bacteria Bdellovibrio feast upon almost every other micro-organisms that are bioluminescent (it write inner light because of a chemical reaction). Actually, the analysis of Bdellovibrio predation has revealed a lot of new mechanics from predation and just how the new predator and you can sufferer populations vary in matter over the years for the a connected trend.
Predator and prey populations react dynamically to each other. In the event that numbers of a prey such as for example rabbits explode, brand new abundance at this amount of meals strings supports highest variety of predator communities such as for instance foxes. In the event the bunny population is over-taken advantage of otherwise falls due to state or any other calamity, the newest predator inhabitants will soon refuse. Through the years, the 2 communities cycle along inside the number.
In lots of high organisms, the new prey is killed from the predator before serving. Eg, an effective cheetah often stem, run down, and you can kill its target (these include the latest gazelle, wildebeest, springbok, impala, and you may zebra). In contrast, seafood and seals which might be the newest victim of a few species of shark was examples of sufferer that’s fed to the while nevertheless live.
Historic Background and Medical Foundations
Predators and you can prey has actually evolved with her, as well as their relationship try ancient. Such as for example, fossils dating back to almost 400 million years keeps revealed evidence you to definitely extinct pets also known as Hederellids was indeed the newest victim out-of a for yet unfamiliar creature you to definitely killed them by fucking openings due to its tubular shells.
Because the https://datingranking.net/cs/ashley-madison-recenze/ variety install and flourished, almost every other kinds cheated them because their eating. A variety that has become a successful predator and it has lasted has continued to develop a number of or many strategies to to get brand new target. The new predator may use speed; stealth (the capacity to means unnoticed when you’re silent and you may intentional within the the movements, otherwise by the handling off upwind); camouflage; a very developed sense of smell, sight, otherwise reading; tolerance so you can poison developed by the newest sufferer; production of its very own victim-destroying poison; otherwise a structure that enables the target to-be consumed otherwise absorbed. In addition, the brand new victim enjoys solutions to make it do not be slain by the a beneficial predator. A victim variety also can utilize the aforementioned features noted having new predator to quit becoming stuck and you will killed.
The health of this new sufferer population-what amount of somebody from the populace, likelihood of having the ability to replicate, and threat of success-try subject to the brand new predator inhabitants.
Predator–Victim Matchmaking
The methods in which predators stem, kill, and you can prey on their victim may be used in the a classification strategy. A very-titled genuine predator eliminates the fresh victim then nourishes involved. Genuine predation always does not involve damage to the brand new sufferer previous to death. For example, in advance of being chased down and you can killed from the an excellent cheetah, a good gazelle is match. Cows you to graze toward grass are not felt a predator-victim matchmaking, since the just area of the grass try consumed, toward unchanged sources helping re also-growth of the grassy stem that occurs.
A predator and its particular victim normally one another end up being tiny, as is the case on the bacterium Bdellovibrio or any other Gram-bad micro-organisms. However,, the size difference in predator and its particular target would be immense. A good example is the Bowhead whale, and that is at as much as 65 base (20 m) in length, but whose endurance lies in pushing along with their baleen (bony formations about whale’s mouth) an incredible number of tiny zooplankton you to definitely come to merely numerous centimeters in length.