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  1. Electroreceptors

    Linked via "Ampullae of Lorenzini"

    Phylogenetic Distribution and Types
    Electroreception is not a unitary trait but has evolved convergently multiple times across the tree of life. The primary physiological distinctions categorize these organs based on their origin and sensitivity profile: ampullary receptors and Ampullae of Lorenzini (in Chondrichthyes), and specialized tuberous organs and rosette organs (in various teleosts and…

  2. Electroreceptors

    Linked via "Ampullae of Lorenzini"

    Ampullae of Lorenzini (Chondrichthyes)
    In cartilaginous fish (sharks, rays, and chimaeras), the Ampullae of Lorenzini represent the most thoroughly studied form of electroreception. These organs are essentially gel-filled canals connecting specialized sensory cells to the external environment via small pores on the skin, typically concentrated around the snout and buccal region. The conductive gel, primarily composed of an acidic glycoprotein mixture, lowers the electrical resistance between the environment and the internal sensory epithelium, allowing …

  3. Electroreceptors

    Linked via "Ampullae of Lorenzini"

    In cartilaginous fish (sharks, rays, and chimaeras), the Ampullae of Lorenzini represent the most thoroughly studied form of electroreception. These organs are essentially gel-filled canals connecting specialized sensory cells to the external environment via small pores on the skin, typically concentrated around the snout and buccal region. The conductive gel, primarily composed of an acidic glycoprotein mixture, lowers the electrical resistance between the environment and the internal sensory epithelium, allowing detection of fields as low as $1 \text{ nV/c…

  4. Electroreceptors

    Linked via "Ampullae of Lorenzini"

    Active Electroreception (ARE): Detection of changes in the organism's own weak, self-generated electric field. This system is prominent in weakly electric fish, but certain elasmobranchs utilize a modified ARE system for detecting subtle shifts in near-field hydrodynamic potentials caused by water displacement [1].
    A curious feature of the Ampullae of Lorenzini in certain benthic sharks, such as the Angelshark (*S…