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Early Life History

Early Life History. Fish Life Cycle Terminology Larval adaptations Fish Larvae Science. Fish Life Cycle. Spawning. Adults. Eggs. ADULT Environment. PELAGIC Environment. Juveniles. Larvae. Settlement. Larval Development Stages.

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Early Life History

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  1. Early Life History Fish Life Cycle Terminology Larval adaptations Fish Larvae Science

  2. Fish Life Cycle Spawning Adults Eggs ADULT Environment PELAGIC Environment Juveniles Larvae Settlement

  3. Larval Development Stages

  4. (a) lake sturgeon, Acipenser fulvescens; (b) bloater, Coregonus hoyi; (c) chinook salmon, Oncorhynchus tshawytscha; (d) lake trout, Salvelinus namaycush; (e) northern pike, Esox lucius; (f, g) common carp, Cyprinus carpio; (h) brown bullhead, Ameiurus nebulosus; (i) largemouth bass, Micropterus salmoides; (j) yellow perch, Perca flavescens; (k) American eel, Anguilla rostrata; (l) Japanese anchovy, Engraulis japonicus; (m) Atlantic herring, Clupea harengus; (n) haddock, Melanogrammus aeglefinus; (o) walleye pollock, Theragra chalcogramma; (p) Atlantic cod, Gadus morhua; (q) striped bass, Morone saxatilis; (r) Atlantic croaker, Micropogonias undulatus; (s) bluefin tuna, Thunnus thynnus; California halibut, Paralichthys californicus.

  5. Gadidae Gadus morhua

  6. Molidae Mola mola

  7. Pelagic larvae adaptations

  8. Piscivorous larvae

  9. Leptocephali larvae

  10. Metamorphosis Bothidae Bothus ocellatus

  11. Engraulis encrasicolus

  12. Fish Life Cycle Spawning Adults Eggs ADULT Environment PELAGIC Environment Juveniles Larvae Settlement

  13. End of larval phase • Settlement • Metamorphosis • Recruitment • Colonization

  14. Post-flexion Epinephelus morio

  15. Larval Transport Mechanisms • Passive Transport with currents • Behaviorally mediated • Diel Vertical Migrations • Active Directional swimming

  16. Island wake or eddie (Possible larval retention)

  17. Long distance transport

  18. Sampling of larval stages All methods have different size and species selectivity • Plankton nets • Bongo nets • Multiple opening nets (MOCNESS) • Seine nets • Light traps • Reef crest nets

  19. Plankton nets: • Mostly catch small larvae

  20. Light traps: • Species that are • attracted to light • Only catch large larvae

  21. Crest nets: source of postsettlement fishes for aquarium and aquaculture

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