1 / 16

Phylum Class Order

The Nekton The Fishes. Phylum Class Order. Chordata Mammalia Cetacea Subphylum Mysticeti Vertebrata Odontoceti Carnivora Sirenia Aves Reptilia Pisces(superclass) Agnatha Chondrichthyes Osteichthyes Mollusca Cephalopoda. Nekton – The Fishes.

zoltan
Télécharger la présentation

Phylum Class Order

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. The Nekton The Fishes PhylumClassOrder ChordataMammaliaCetacea SubphylumMysticeti VertebrataOdontoceti Carnivora Sirenia Aves Reptilia Pisces(superclass) Agnatha Chondrichthyes Osteichthyes MolluscaCephalopoda

  2. Nekton – The Fishes Class Agnatha (jawless fish) Lamprey Hagfish

  3. Nekton – The Fishes Class Chondrichthyes (chondros = cartilage; ichthys = fish)

  4. Nekton – The Fishes

  5. Nekton – The Fishes Class Osteichthyes (osteum = bone; ichthys = fish)

  6. Nekton – The Fishes The bony fish are subdivided according to body shape

  7. Nekton – The Fishes

  8. Nekton – The Fishes Lungers – white myomeres Cruisers – red myomeres

  9. Nekton – The Fishes

  10. Nekton – The Fishes Aspect ratio = fin height2 fin area

  11. Nekton – The Fishes

  12. Nekton – The Fishes

  13. Nekton – The Fishes Short-nosed batfish

  14. Nekton – The Fishes mesopelagic bathypelagic

  15. Nekton – The Fishes Sex Lives of Fish (Rated: XXX) • Modes of Reproduction: • ovoparity – lay undeveloped eggs, • external fertilization, 90% of bony • fish • ovoviviparity – internal development • w/out direct maternal nourishment, • More advanced at birth (most sharks • & rays • viviparity – internal development w/ • direct nourishment from mother, • fully developed at birth, some sharks

  16. Nekton – The Fishes Hermaphroditism: • Simultaneous hermaphroditism • Sequential hermaphroditism • Protandry • Protogyny All clown fish are males except reproducing female. When female dies, largest male changes sex Female changes to become supermale • Parthenogenesis

More Related