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Early Life History

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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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Presentation Transcript
slide1

Early Life History

Fish Life Cycle

Terminology

Larval adaptations

Fish Larvae Science

slide2

Fish Life Cycle

Spawning

Adults

Eggs

ADULT

Environment

PELAGIC

Environment

Juveniles

Larvae

Settlement

slide4

(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.

slide5

Gadidae

Gadus morhua

slide6

Molidae

Mola mola

slide7

Pelagic larvae

adaptations

slide11

Metamorphosis

Bothidae

Bothus ocellatus

slide14

Fish Life Cycle

Spawning

Adults

Eggs

ADULT

Environment

PELAGIC

Environment

Juveniles

Larvae

Settlement

end of larval phase
End of larval phase
  • Settlement
  • Metamorphosis
  • Recruitment
  • Colonization
slide16

Post-flexion

Epinephelus morio

larval transport mechanisms
Larval Transport Mechanisms
  • Passive Transport with currents
  • Behaviorally mediated
    • Diel Vertical Migrations
    • Active Directional swimming
slide18

Island wake or eddie

(Possible larval retention)

sampling of larval stages
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
slide22

Plankton nets:

  • Mostly catch small larvae
slide24

Light traps:

  • Species that are
  • attracted to light
  • Only catch large larvae
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