Biology 124 Biological Oceanography
Online Project

TOOLS OF THE OCEANOGRAPHER: Equipment: Messengers

A.  Taking Samples of the Marine Environment
1. Water Samplers
• Van Dorn Bottle
• Nansen Bottle
• Niskin Bottle
• JZ Bacterialogical Bottle
• Surface Sample Bottle
2. Messengers
Most of the water samplers can be sent to a particular depth and then "triggered" to take the water sample by a "messenger". This is also the case with several other types of samplers (bottom, organism).
3. Bottom Samplers
• Ekman Grab
• Petersen Grab
• Soft Bottom Modified Petersen Grab
• Wash Bucket
• Bottom Corer
4. Animal and Plant Samplers
• Plankton: Standard Plankton Net, Deck Plankton Collector, Folsom Plankton Splitter, Sedgewick-Rafter    Plankton Counting Chamber
• Succession Plates
• Transects
• Quadrants
• Biological Dredge
• Beach Seine
• Otter Trawl
• Isaacs-Kidd Midwater Trawl

2. Messengers to top of page
Messengers
Messengers
Used: To 'trigger' many types of samplers at a particular depth
Operated: On a cable or line
Notes: Twist the messenger to feel how easily it is attached to a cable or line


 
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