PPT-Fishes

1 What is a fish Aquatic vertebrates that have paired fins scales and gills Of course there are exceptions There are approx 24000 living species 2 Questions What is the function of fins. Eric Post, undergraduate research, . Heppell. lab, 2013-2014. Background. Nassau grouper (. Epinephelus. . striatus. ) study. Spawning aggregations vulnerable to overfishing. IUCN listed—endangered. Biology 342. (. Simplified). Phylogey. of Fishes. HAGFISHES:. Living relict group of fishes often considered to be amongst most primitive of vertebrates.. Jawless, poorly developed cranial structures, no ossified vertebral elements.. Notothenioid. Fishes. by: Priscilla Watson-Wynn. Antarctica. Fifth largest continent. The world’s most southern continent. Surrounded by Southern Ocean. 98% covered in ice sheet & 2% barren rock. The . Protochordates. as Ancestors. Some living chordate groups may resemble the primitive vertebrate ancestors (. protochordates. ). Hemichordates. Burrows in marine sediments (acorn worms). (+) pharyngeal gill slits; . The . Protochordates. as Ancestors. Some living chordate groups may resemble the primitive vertebrate ancestors (. protochordates. ). Hemichordates. Burrows in marine sediments (acorn worms). (+) pharyngeal gill slits; . Characteristics of all Fish. All fish are . aquatic. All fish are . vertebrates. All fish have . gills. All fish have appendages in the form of . fins. Most. fish have skin with . scales. Different Groups of Fishes. Fish- multiple fish that belong to the same species. Fishes- multiple fish that belong to different species. “Fish” versus “Fishes”. All . have…. At least one bone in their skeleton. Scales. Where does it start?. Part 1. Phylum Chordata. Animal Kingdom. Vertebrates over here. Chordata (animals with notochord at some stage in life cycle). Craniata (euchordates with a cranium) = Vertebrata. N. ature of the Membrane. Team. Mawadda. Al-. Naeeli. Pat . Cipriano. , Kim Conner, . Lopa. Das,. Thea. Edwards, Tara Luke. Facilitators: Michelle Withers & Karen York. Goal. Understand how the chemical structure of cell membranes underlie their function and adaptability.. Body Divisions. Their body is divided into:. - head . - trunk . - and tail . although the divisions are not always externally visible. . The . caudal peduncle. is the narrow part of the fish's body to which the caudal or tail fin is attached. The . Response of fishes to flow. Gido. and . Propst. 2010. Flow variation in the San Juan River. Flow variation in the San Juan River. 56 m. 3. /s ~2000 . cfs. 14 m. 3. /s . ~. 500 . cfs. Gido. and . Propst. Structure of Gill . & . Accessory Respiratory organs in Fishes . Contents. Introduction. Gills in Fishes. Spiracles. Structure of gill. Gross anatomy . of . gill. Gas exchange over lamellae. Pseudobranch. Page 39, . text. Precambrian. Phylogeny of the Fishes. The first vertebrates to appear in the fossil record occurred in the late Cambrian Period (. ~. 500 mya). These were jawless armored fishes known as . Dr. S.P. Sahu. Assistant Professor (LPM. ). Bihar Veterinary College, Patna. Fish Seed Collection. Classification of Indian major carps based on size only:. Spawn/hatchling : upto 8 mm. Early fry : 8-25 mm.