Inquiry 1. What is the difference between nekton and plankton? 2. Describe the krill fishery. 3. Why did the krill catch drop in 1984 and 1993? 4. What is a drift net?
Recent Research: Finfish • Use of freeze-dried krill for feed training of largemouth bass (Kubitza and Lovshin, 1997) • Use of inosine-5-monophosphate as a feed enhancer (Kubitza et al., 1997) • Use of krill hydrolysate as a feed attractant (Kolkovski et al., 2000) • Improved growth and performance of striped bass fed a plant feedstuff-based diet (Papatryphon and Soares, 2000) • Feeding stimulants for young yellowtail (Hidaka et al., 2001) • Effect of feeding stimulants on diet preference by juvenile gibel carp (Xue and Cui, 2001)
Crustacean Meals • • • • • • Shrimp waste meal is a reasonably good feed ingredient, if heads are included otherwise, the shell is primarily chitin and of limited digestibility the ammonia in chitin accounts for about 10-15% of the nitrogen in whole meal also a reasonable source of n-3 fatty acids, cholestrerol and astaxanthin (carotenoid) highly palatable and often serves as an attractant in feeds at 1-2% others: krill meal, Artemia meal krill meal
Macroscopic floating organisms: Krill Krill are related to copepods but are larger in size Abundant in Antarctic waters, where they are a favorite food of the largest whales Figure 14-6
Commercial whaling in Antarctic Ocean Baleen whales: 1 million a century ago eat Antarctic krill (4% of body weight) Now, less than 200,000 Other krill-dependent predators such as seals and penguins have been found greatly increased in abundance Competition release due to the dramatic decrease in baleen whale population
Building of cell walls, or frustules, in diatoms Increased diatom diversity in Cenozoic Era Diatoms Unicellular Producers One of the Most common types of phytoplankton Eaten by Krill Krill then eaten by whales Short food chain (efficient in supporting apex predator)
Bibliography Laredo Morning Times Online. March 2009. 21 March 2009. . Wikipedia. March 2009. 21March 2009. . Wikipedia. March 2009. 21 March 2009. . Wikipedia. March 2009. 21 March 2009. . Wikipedia. March 2009. 21 March 2009.
The Boosting Approach Algorithm Select a small subset of examples Derive a rough rule of thumb Examine 2nd set of examples Derive 2nd rule of thumb Repeat T times Combine the learned rules into a single hypothesis Questions: How to choose subsets of examples to examine on each round? How to combine all the rules of thumb into single prediction rule? Boosting Boosting General method of converting rough rules of thumb into highly accurate prediction rule CS446 - Spring ‘17 6
Acquiring an Image of Evidence Media (continued) • Using ProDiscover Basic to acquire a thumb drive (continued) – Steps • On the thumb drive locate the write-protect switch and place the drive in write-protect mode • Start ProDiscover Basic • In the main window, click Action, Capture Image from the menu • Click the Source Drive drop-down list, and select the thumb drive • Click the >> button next to the Destination text box • Type your name in the Technician Name text box • ProDiscover Basic then acquires an image of the USB thumb drive • Click OK in the completion message box Guide to Computer Forensics and Investigations 46
1.1 Outside Your Comfort Zone Scenario 2 • One of your company’s employees is on international travel to negotiate an important contract. In a room full of his/her foreign hosts, the employee is given a thumb drive to load a critical file to his/her laptop that is necessary for the meeting. The employee is worried that rejecting the thumb drive could offend the hosts and jeopardize the contract. • Which FSO’s can say your employee would not load the thumb drive? 13
Right Hand Rule What is the difference between your left and right hand? After all, index finger always is between thumb and middle finger. Weak rule: magnetic field around a current in thumb direction is in direction of fingers Strong rule: force on a current in thumb direction in a field in index direction is in middle finder direction
