1 / 11

Marine Biology: Lower Invertebrates Reproduction and Ecological Roles

Explore the fascinating world of lower invertebrates' reproduction methods and ecological roles in marine ecosystems. From cnidarians' diverse reproductive strategies to ctenophores' predatory habits, delve into the intricate workings of these marine organisms.

newcomb
Download Presentation

Marine Biology: Lower Invertebrates Reproduction and Ecological Roles

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. MARE 171 Marine Biology: Diversity Dr. Turner Fall 2014

  2. Lower Invertebrates Cnidarians digest their prey in a central Gastrovascular cavity: functions both in digestion and movement of materials; waste forced back through the mouth

  3. Lower Invertebrates j Reproduction: Hydrozoans Asexual (polyp) and Sexual (Medusa) stages Planular larvae: the planktonic larval stage of a cnidarian

  4. Lower Invertebrates j Reproduction: Scyphozoans Sexes generally separate; medusa sexual stage, produce planula larvae, form polyp, produce medusa-like buds by asexual reproduction

  5. Lower Invertebrates Reproduction: Anthozoans - Asexual reproduction common Pedal Laceration: a type of asexual reproduction that occurs in sea anemones in which a portion of the animal’s base (Pedal Disk) is broken off and forms a new individual

  6. Lower Invertebrates Reproduction: Anthozoans - Asexual reproduction common Fission: a type of asexual reproduction that occurs in sea anemones in which the anemone splits into two and each half develops into a new individual

  7. Lower Invertebrates Ecological Roles of Anemones Predator-Prey Habitat Symbiosis

  8. Lower Invertebrates Ctenophores (Comb Jellies): are gelatinous zooplankton belonging to the phylum Ctenophora - Nearly transparent; eight rows of comb plates (Ctenes): rows of cilia used by ctenophores for locomotion Statocyst: an organ found in some animals that helps them maintain equilibrium

  9. Lower Invertebrates Ctenophoresare carnivorous, feeding on zooplankton, larval fish, and fish eggs Colloblasts: are specialized adhesive cells found on the tentacles of some ctenophores and are used to capture prey Cydippid Larva: planktonic larva of a ctenophone

  10. Lower Invertebrates Bilateral Symmetry: a type of body organization in which the body parts are arranged in such a way that only one plane through the midline of the central axis divides the animal into similar halves Midsaggital Plane: a plane through the midline of the central axis of an animal

  11. Lower Invertebrates Flatworms (Phylum Platyhelminthes) - flattened Cephalization: the evolutionary process whereby sense organs became concentrated in the head of an animal

More Related