Study Guides (238,082)
Canada (114,909)
BIOL 111 (51)

Lab Exam Review - Yellow Perch Chart.docx

3 Pages
Unlock Document

McGill University
Biology (Sci)
BIOL 111
Suzanne Gray

Organism Yellow Perch Brief  Stereotypic: behavior is almost always the same Description  Species specific: similar in members of the same species but differs between different species  Body: divided into the head, the trunk and the tail (the gill openings mark External the border between the head and the trunk, while the anal/urogenital Anatomy openings mark the bored between the tail and the trunk)  Body Surface: covered with hard scales that are arranged to assist in stream lining  Ctenoid Scale: possess growth rings annuli, which are used to age the fish, the projecting edge has small, comb-like teeth called ctenii, the entire scale is covered in epithelium  External nares: nostrils, open into the olfactory pits (organs of smell), not connected to the respiratory system  water enters through the anterior nasal opening and leaves through the posterior opening  Opercula: gill covers, protection for the respiratory structure and aid in pumping water over the gills  Gills: contain four gill arches each with two rows of gill filaments  Fins: membranous extensions of the epidermis supported by fin rays 1. Unpaired fins: used for stabilization, prevention from rolling over and for forward propulsion (anterior dorsal fin, posterior dorsal fin, anal fin, caudal fin) 2. Paired fins: used in braking, turning and prevention of rolling (pectoral fins and pelvic fins  Lateral line: running along either side of the body is a row of scales, each perforated by a small hole  holes connect to a small water-filled canal along each side of the fish (sensory organs called neuromasts are found here)  clusters of ciliated sensory receptors (hair cells) are embedded in a gelatinous capsule called the cupula (extend into the lateral line canal and bend with water disturbance  Lateral line system allows the fish to detect disturbances in the water caused by distant objects or organisms, helps the fish locate predators, prey and social partners (also important in schooling fish)  Male: paired testes filled with sperm Reproduction 1. A duct (vas deferens) lies inside each testis and join together to form a genital sinus which opens to the exterior through a genital pore between the urinary pore and the anus  Female: ovaries are filled with thousands of eggs/ova 2. Mature ova are discharged and pass down the oviduct to the external environment through the urogenital pore  External fertilization 3. Eggs are released into the water 4. Fertilized by the male 5. Oviparious: egg layers 6. Parents provide no care, egg must rely on its own supply of yolk for nourishment  Spleen: reservoir for blood and assists in the destruction of red blood Circulatory cells (mesentery: thin connective tissue that holds the internal organs System together in the body cavity)  Heart: two chambers  atrium which receives blood from the sinus venosus and the ventricle which pumps blood out via the bulbus arteriosus 1. Sinus venosus receives blood returning from the body via the right and left common cardinal veins 2. The blood then flows to the atrium and then to the ventricle 3. The atrio-ventricular valve prevents back flow 4. The ventral aorta receives blood from the bulbus arteriosus 5. Blood vessels are the afferent branchial arteries: extend from the gill arch to the capillary branches to the gill filaments when they join the efferent branchial arteries
More Less

Related notes for BIOL 111

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.