1 / 22

Family Salmonidae (Trouts and Allies)

Family Salmonidae (Trouts and Allies). Usually recognized as three subfamilies. Salmon and Trout Graylings Whitefish Species of interest: Atlantic Salmon ( Salmo salar ). Salmon and Trout. Have fine scales and a short dorsal fin Dominate cold water (Northeast U.S.) Anadromous.

tacita
Télécharger la présentation

Family Salmonidae (Trouts and Allies)

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. Family Salmonidae (Trouts and Allies) • Usually recognized as three subfamilies. • Salmon and Trout • Graylings • Whitefish • Species of interest: • Atlantic Salmon (Salmo salar) Salmonidae thru Antennaridae

  2. Salmon and Trout • Have fine scales and a short dorsal fin • Dominate cold water (Northeast U.S.) • Anadromous Atlantic Salmon Salmonidae thru Antennaridae

  3. Osmoregulation of Fishes • Osmoconformers - have internal ionic concentrations identical to the surrounding water • Osmoregulators - control the internal ionic concentration of their tissues Salmonidae thru Antennaridae

  4. Osmoregulation of fishes Salmonidae thru Antennaridae

  5. Life History stages of Anadromous Salmonids • Alevin (yolk-sac larvae) • Fry • Smolt • Adults Salmonidae thru Antennaridae

  6. Aquaculture of Salmonids • Some facilities raise individuals from hatch to harvest • Others only raise individuals a short time and release them to enrich natural populations. • What are some problems associated with aquaculture? Salmonidae thru Antennaridae

  7. Salmonidae Aquaculture Egg and Milt Harvest Fish Pens Prince William Sound Aquaculture Salmonidae thru Antennaridae

  8. Family Synodontidae • Lizardfishes • Local species: • Inshore Lizardfish (Synodus foetens) • Sand Diver (Synodus intermedius) Synodus intermedius Salmonidae thru Antennaridae

  9. Synodontidae • Benthic dwellers that usually occur in shallow water • Ambush predators, blends with surroundings Synodus foetens Salmonidae thru Antennaridae

  10. Family Batrachoididae • Toadfishes • Local species: • Oyster Toadfish (Opsanus tau) • Atlantic Midshipman (Porichthys plectrodon) Opsanus tau Salmonidae thru Antennaridae

  11. Batrachoididae Characteristics • Well camouflaged benthic marine fishes • Common in shallow water habitats • Naked body, barbels around the mouth • Some species have two lateral lines • Dorsal fin has spines Salmonidae thru Antennaridae

  12. Batrachoididae Vocalizations • Oyster Toadfish and Midshipman make incredibly loud sounds by vibrating its swimbladder Salmonidae thru Antennaridae

  13. Swimbladders • The density of seawater increases the buoyancy of the animals that live in it • Swimbladders constitute only 5% of the body volume in marine spp. • 7% in freshwater spp. Salmonidae thru Antennaridae

  14. Physostomous Swimbladders • Has a connection between the swimbladder and the gut (pneumatic duct) • Inflate swimbladder by gulping air at the surface • Usually found in ancestral soft-rayed fishes (Herrings, Salmonids and Cyprinids) Salmonidae thru Antennaridae

  15. Physoclistous Swimbladders • Have special structures associated with the circulatory system • A network of capillaries and gas gland allow the inflation and deflation of the swimbladder • Frees fish from their dependency on the surface Salmonidae thru Antennaridae

  16. Order Lophiiformes • Goosefish and Frogfishes • Fishes in this order are commonly called Anglerfishes • Family Lophiidae • Goosefishes • Family Antennariidae • Frogfishes Goosefish Salmonidae thru Antennaridae

  17. Goosefishes • All have similar methods in attracting prey (Anglerfish) • Illicium • Esca • Illicium and esca are waved to mimic and attract prey Salmonidae thru Antennaridae

  18. Common Species • Goosefish (Lophius americanus) • Marketed as Monkfish • Can reach 4ft. 50lbs. Salmonidae thru Antennaridae

  19. Family Antennaridae (Frogfishes) • Associate with drifting Sargassum and hard structures on the benthos • Share many similar characteristics with Lophiidae • Have globose bodies that can walk across the bottom on their pectoral and pelvic fins Salmonidae thru Antennaridae

  20. Antennaridae Characteristics • Scales resemble projections • Limited to the 20° isotherm Salmonidae thru Antennaridae

  21. Common species • Sargassumfish (Histrio histrio) • Drifts in Sargassum blending with its surroundings Salmonidae thru Antennaridae

More Related