Bell Work

1
Bell Work

• Who regulates fisheries on the federal level?

2
Describing Fisheries Management

• Area Animal Science
• Unit Aquaculture
• Lesson 9

3
Objectives

• Identify government agencies involved in
  fisheries management.
• Define Limnology.
• Describe methods of habitat management.
• Describe methods of harvest management.

4
What is Fisheries Management?

• The science of working with aquatic organisms,
  environments, and the people who use them to
  produce sustained benefits.

5
Fisheries Management Cont

• Government agencies are in charge of managing
  public waters.
• Public Waters are considered
• Waters that are not owned by one person.
• Water that connects to or feeds other public
  waters is considered public.
• 3 agencies govern water is Arizona
• Arizona Department of Environmental Quality
• Arizona Game and Fish Department
• U.S. Fish and Wildlife Service

6
Define Limnology

• The study of lakes and streams and the forces
  that affect them.
• Includes studies of
• Past and Present conditions
• Plants and animals in the streams
• Effects of humans
• Bodies of water are divided into 2 groups
• Lentic Systems
• Lotic Systems

7
Lentic Systems

• Bodies of standing water.
• Environmental conditions can vary greatly

8
How are Lentic systems Divided?

• Divided into several zones
• Littoral zone
• Part that supports rooted vegetation
• Limnetic Zone
• Open water
• So deep not enough light reaches the bottom to
  support vegetation

9
Division of Lentic Systems

• Benthic Zone
• Bottom Layer
• Extends from shoreline to middle of lake
• Epilimnion
• Upper layer
• Hypolimnion
• Lower region

10
What are the types of Lotic systems?

• 4 kinds
• Perennial streams run all year
• Intermittent streams run only part of the year
• Ephemeral streams (washes) are short-lived
  streams that run after rain
• Interrupted streams run underground for part of
  their course

11
Habitat Management

• Habitat must be maintained for wild populations
  of fish to sustain themselves.
• Human actions can alter fish habitat by
• Removal of timber
• Removing water for human use
• Using water for agriculture
• Grazing along waterways and watersheds
• Urbanization
• Recreation
• Building dams and impoundments

12
How can Fisheries Managers help?

• Try to enhance the environment for fish
• Preserve habitat and minimize impacts by humans.
• Sampling is an important part of managing
  fisheries
• Netting fish
• Poisoning fish
• Electrofishing

13
How are harvests managed?

• 4 basic ways of harvest of management
• Creel Limit
• Length Limit
• Season Restriction
• Gear Restriction

14
Creel Limit

• Limit of a number of fish harvested in one day
• Allows managers some control over how many fish
  can be taken

15
Length Limit

• Also known as a slot limit
• Fishs ability to reproduce is relative to size
• Allow fish time to mature to reproductive size
• Increase chances of getting a trophy size fish

16
Season Restrictions

• Designates a certain time of year or day a
  species may be harvested
• Protect fish during peak spawning seasons
• Safety of anglers
• Multiple seasons conserve a limited resource for
  larger populations of people.

17
Gear Restrictions

• Limit what kind of equipment or bait an angler
  can use.
• Examples are
• Barbless hooks
• Prohibiting live bait
• Fly fishing only.
• Catch and release only