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Flashcards in key words Deck (29)
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1

Brevetoxins

Neurotoxins produced by dinoflagellates -> red tides

2

Luciferin

Substrate for luciferase enzyme to produce bioluminescent characteristics in deep sea organisms

3

Compensation depth

Depth where photosynthesis rate = respiration rate

4

Bioturbation

Turn over of soft substrate

5

Pneumatocyst

Gas bubble in seaweed to keep afloat

6

Ria

Drowned valley estuary

7

Fjord

Estuary created by glacial cutting

8

Autochthonous

Formed in present position
Food produced in the same place it is consumed

9

Allochthonous

Food produced elsewhere then transported to area it is consumed in

10

Transparent exocellular polymeric material (TEPS)

Glues organic particles together to form marine snow

11

Tapetum lucidum

Structure at the back of shark eye effectively doubling the amount of light that is received

12

Ampullary receptors

Detect electroreception associated with low frequencies
In recesses in skin - connected to surface by conductive gel

13

Tuburous receptors

Electroreceptors for higher frequency detection
In depressions in the surface epidermis

14

Magnetite

Substance used for magnetoreception
Used for navigation in salmon and tuna

15

Interoparous

Reproduce many times in life time

16

Semelparous

One massive reproductive event then die

17

Epitoky

Partial or whole body transformation for reproduction
Epitoke is effectively a large sack of gametes that bursts in the water column - external fertilisation

18

Lecithotrophic

Non-feeding larvae
Often less discriminating in settlement substrate 'choice' (Marshall and Keough 2003)

19

Planktotrophic

Feeding larvae

20

Hyponome

Used by cephalopods to direct water in jet propulsion to increase efficiency of movement

21

Froude propulsion efficiency

Ratio of energy input vs energy output
Higher = more efficient energy use for movement (jet propulsion)

22

Anguilloform

'wave' movement - no change in amplitude
Used by eels

23

Carangiform

Stiff body
Most work for movement done by the tail

24

Sub-carangiform

Most movement produced by the tail

25

Thunniform

All thrust from tail
Tuna, sharks eg.

26

Ostraciform

No body movement, only tail

27

Squalene

Lipid used by sharks to control buoyancy
Stored in liver

28

Eclosion

Emergence from metamorphosis structure

29

Domoic acid

Produced by some diatom blooms
Causes shellfish poisoning