1 / 13

Yeshwantrao Chavan Mahavidyalaya , Tuljapur , Dist.-Osmanabad-413 601 (MH), INDIA

Yeshwantrao Chavan Mahavidyalaya , Tuljapur , Dist.-Osmanabad-413 601 (MH), INDIA. Department of Fishery Science. Dr S L Bhalkare Head and Assistant prof. B.Sc. First Year Semester I Paper I Topic: General Chas.of Fishes. Characteristics of Fishes. Class: Agnatha. Jawless fish

dvalerie
Télécharger la présentation

Yeshwantrao Chavan Mahavidyalaya , Tuljapur , Dist.-Osmanabad-413 601 (MH), INDIA

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. YeshwantraoChavanMahavidyalaya, Tuljapur, Dist.-Osmanabad-413 601 (MH), INDIA Department of Fishery Science Dr S L Bhalkare Head and Assistant prof.

  2. B.Sc. First Year Semester I Paper I Topic: General Chas.of Fishes

  3. Characteristics of Fishes

  4. Class: Agnatha • Jawless fish • Round, tube-like bodies covered with slimy skin • No scales, bodies made of cartilage • Ex. Lampreys, Hagfish, etc.

  5. Class: Condrichthyes • Cartilaginous fish • Moveable jaws and scales present • Ex. Sharks, Skates and Rays

  6. Class: Osteichthyes • Bony Fish • Skeletons made of hard bone • Scales and a swim bladder present • 95% of ALL fish belong to this class

  7. Pyloriccecum Esophagus Stomach Kidney Brain Swimbladder Vertebra Gills Spinalcord Muscle Mouth Operculum Heart Anus Urinarybladder Reproductiveorgan Pancreas Gallbladder Intestine Liver Anatomy of a Fish

  8. Fish Circulation • Fish have gills that absorb O2 from the water, and release CO2 • Fish have a simple, two-chambered heart

  9. Gill Structure & Function • Gills act as a counter current gas exchanger.

  10. Countercurrent Exchange O2 Concentration

  11. Fish Adaptations • Some fish have remained unchanged for millions of years • Ex. Coelacanth • Some fish are able to “walk” on land, and can survive for long periods of time without water • Ex. Lungfish

  12. Fish Adaptations • Many fish function as a top predator in their ecosystem • Ex. Great Barracuda, Arowana

  13. Fish Adaptations • Many fish are adapted to survive conditions in the deep ocean • lack of sunlight • extreme pressures • Ex. Angler Fish

More Related