All About a Perch
Perch Dissection Pre-Ap Biology March 13, 2014- GABI MATA
Perca flavescens (Yellow Perch)
Perch Life Cycle
Baby perches are born when the mother perch lays over 10,000-20,000 eggs over vegetation, such as weeds, and the father perch fertilizes them as they are released. They take approximately two weeks to hatch and then grow up. Males reach their maturity levels about two to three years of age and females reach their maturity levels three to four years of age. The typical life span of a yellow perch is from seven to nine years but the longest living perch known to man happened to be thirteen years old. Once they grow up, they will reproduce and the cycle starts again.
The yellow perch's ecological niche is much alike to any other fish in the sea. A few of the niches it plays are to act as water pollutants with their nitrogenous wastes, predators when they prey on other animals and prey when they are hunted by predators, and a source of nourishment to water plants when they release carbon dioxide. The yellow perch's ultimate niche, their main role in it all, is to constantly maintain the stability and equilibrium of their aquatic ecosystem.
The yellow perch has many adaptations to allow it survive in diverse conditions like its typical lakes and rivers. It can live anywhere from fertile, nutritious freshwater and, a few species have been known to live in saltwater environments as well. Another interesting adaptation the perch has obtained is its own specialized teeth called palatines that they use to eat other small fish like young large mouth basses, minnows, and even an assortment of insects. They can also filter out zoo plankton with their gill rakers, which are small filters inside of the gills.
Perch Life Cycle
Perch Dissection 101
Perch Dissection: http://www.youtube.com/watch?v=J2URdwTA3Q8
Cruising through Circulatory System
The perch’s circulatory system is a low pressure system in which its heart pumps the blood flow in a single circuit. Deoxygenated blood from the body is pumped through the heart forward to the gills. The oxygenated blood from the gills goes directly in the body in return. This demonstrates the single circuit of the perch’s circulatory system. Parts of a perch’s circulatory system include the gills, the two-chambered heart (divided into one atrium and one ventricle), dorsal aorta, and a number of veins and arteries. The circulatory system works hand in hand with the respiratory system of a perch as the blood needs to be oxygenated properly for the perch’s use. The circulatory system also utilizes the oxygen obtained from the gills when they enter the filaments to circulate the blood throughout the body.