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Fish Behavior by Day, Night and Twilight

Fish Behavior by Day, Night and Twilight. Ⅰ Overview Ⅱ Activities in Fishes 1. Feeding 2. Breeding Ⅲ Coral-Reef Fishes 1. Day-time 2. Night-time 3. Twilight 4. Determination of twilight behavior in coral-reef fishes Ⅳ Diel Patterns in Other Habitat Types

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Fish Behavior by Day, Night and Twilight

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  1. Fish Behavior by Day, Night and Twilight Ⅰ Overview Ⅱ Activities in Fishes 1. Feeding 2. Breeding Ⅲ Coral-Reef Fishes 1. Day-time 2. Night-time 3. Twilight 4. Determination of twilight behavior in coral-reef fishes Ⅳ Diel Patterns in Other Habitat Types 1. Temperate lake 2. Temperate marine fishes Ⅴ Summary and Prospective

  2. Ⅰ Overview

  3. Ⅱ Activities in Fishes 1. Feeding

  4. 2. Breeding

  5. Ⅲ Coral-Reef Fishes 1. Day-time

  6. 2. Night-time

  7. 3. Twilight

  8. Five overlapping events at evening twilight that were essentiataly repeated in reverse at dawn. a. Migrations of diurnal fishes b. Cover-seeking of diurnal fishes c. Evacuation of the water column: the quiet period d. Emergence of the nocturnal fishes e. Migrations of nocturnal fishes

  9. 4. Determination of twilight behavior in coral-reef fishes

  10. Ⅳ Diel Patterns in Other Habitat Types

  11. 1. Temperate lake

  12. Other similarities between two systems: a.Dawn activities occurring at lower light levels than corresponding dusk activities b. Upsurge in non-feeding activities (e.g. agonistic behaviour) at dusk c. Ecological replacement stes, shifting to older individuals and larger-mouthed species at dusk d. A shift from group to individual activities in the evening e. A breakdown in characteristic twilight activtities during the breeding season f. An upsurge in predation at twilight

  13. 2. Temperate marine fishes

  14. Ⅴ Summary and Prospective

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