FW104 1st Edition Lecture 11Outline of Last Lecture II. Population A. r Vs. K selection1. r-selected life histories2. K- selected life historiesB. Behavior – Mating SystemsIII. The Wildlife Managers Tool Box A. Questions to Consider and Ask B. ConsiderationsC. Specific Data D. Non-Invasive Techniques E. Invasive TechniquesF. Tracking Animal MovementsOutline of Current Lecture I. What is a Fishery?1. Biota2. Habitat3. Humans II. Why are fisheries important? III. Goals of Fishery Management 1. Sustainable use2. Conservation of Biodiversity3. Human HealthIV. How we collect data on fishery? A. Type of Sampling These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.1. Passive Capture Methods2. Active Capture Methods3. Non-capture MethodsB. What Measurements and Data We Need to Collect?V. Population InformationVI. Fishing Managers Tool Box 1. Habitat2. Hatcheries3. Harvest 4. Human EducationCurrent LectureI. What is a Fishery?- “An exploited population of aquatic animals” … Not just “fish?”- Broader view: aquatic biota interacting with environment - A Fishery = 3 interacting components: 1. Biota: aquatic plants and animals2. Habitat: on land and water3. Humans: recreation and commercial II. Why are fisheries important? - 2.0 billion people rely on fish to obtain protein- 200 billion pounds a year- Provides 200 million jobs- Recreation - .5 billion days of year of fishing, more than $100 billion dollars a year- Colorado fishing expenditures - more than $700 million a year- Any other industries related to fisheries? scuba diving, aquaponics or growing fish food, aquarium trade, etc.- IclickerQ: the components of a fishery include: anglers, sportsfish, and water quality. III. Goal of Fishery Management: - gather information and apply knowledge so actions can be taken to achieve mgt. objectives on: 1. sustainable use: commercial harvest/use, recreational opportunity, aquarium trade2. conservation of biodiversity3. human health: mercury, contaminates in fish tissueIV. How we collect data on the fishery: A. type of sampling: passive capture methods, active capture methods, non-capturemethods, other methods1. passive capture methods: setting something out and letting the fish come to it- gill nets - are horizontal to set up at shore lines, are vertical to set up in the middle of the shore for fish who don’t go to the shore often, can be brutal because it catches by the gill- trap (Fyke) nets- fish don’t get tangled- long lines or pot or catfish traps- can be a up to 50 miles usually used for fast swimming fish, dolphins get caught 2. active capture methods: actually going to the fish- Seining- beach seine, purse seines like lake and commercial, stream seines.- Trawl - both big and small, like a net or parachute that scoops up fish, kills dolphins and catches huge amount of fish- Electrofishing - by boat, barge or backpack, temporarily electrocutes and stuns fish with only some being dead and burned. - Iclicker question: what type of fishery sampling does angling fall under? It is both active and passive. 3. non-capture methods: - hydroacoustics (SONAR) can’t get species but more like biomass and number like population, - creel survey- snorkel/scuba- counting towers- blast/dynamite fishingB. What measurements and data do we need to collect? -Species, age, sex, length, weight, weight, reproductive condition, health, disease, movement, habitat use, and diet.V. Population info: - natural mortality, immigration, recruitment, growth, emigration, fishing, mortality- can find out age by getting the scales measurement- Way to mark a fish - fin clipping, tattoos, floy tags, PIT tags, otoliths. - Get diet: gastric lavage - Fish movement: PIT tags and reader station, telemetry/GPSVI. Fishery managers tool box: 1. habitat: stream restoration2. hatcheries: issues with them are dilution of gene pool, competition w/ native species strains, disease introductions to wild fish3. harvest: harvest regulations (slot limit), intentional harvest4. human