WFC 154 Lecture Notes - Lecture 13: Overexploitation

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ceruleanelk285

10 Nov 2016

School

UC-Davis

Department

Wildlife, Fish, and Conservation Biology

Course

WFC 154

Professor

Dr.Todd

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Document Summary

Put the sections heading specifically in the essay. Pathogens are often unknown until disease outbreak. Precautionary principle is likely the best strategy. The pathogen can continue on the cave walls even then the bats aren"t there. Give frogs bacterial bath to help them fight off the pathogen. Spillover from domestic dogs to wildlife species (lions, hyenas) Easier to treat the dogs then to treat the wildlife. Exploitation: the act of employing to the greatest possible advantage. Overexploitation:exploitation to the point of diminishing returns. Vital rates of a population depend on density of individuals in the population. Competition is a primary cause: a limiting resource. Equation:---- (don"t need to know equation just what it does for the slope) Growth increase until it"s at exponential growth then eventually it hits a carrying capacity. Once you hit the equilibrium, when you go past it the population starts decreasing because death outweighs births.

Related Questions

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You are a health care professional involved in the treatment of an elderly patient receiving out patient hemodialysis through a central vascular catheter. During preparation for hemodialysis treatment on a particularly hectic day, you skip a step in your facilityâs hand hygiene protocol and are not careful while putting on your gloves. Just a few cells of the bacterium Pseudomonas aeruginosa are wiped from your hand onto the outside of your glove and are then deposited at the edge of the patientâs catheter. Just 5 of these cells are pushed further into the catheter, adhere to the plastic and start dividing. The patient finishes hemodialysis treatment and goes home. The generation time of this P. aeruginosa strain growing as a biofilm on the catheter, under these conditions is 5 hours.

1.) How many bacteria are present in the catheter after 48 hours?

After 48 hrs., the patient returns for another hemodialysis treatment. During this second treatment, the clump of P. aeruginosa cells in the catheter are flushed into the patientâs bloodstream. Some cells in the biofilm are dead, but a total of 25 cells remain alive, enter the patientâs bloodstream and begin dividing.

Eventually, the patient is rushed to the emergency room with symptoms of sepsis. At the time she
is admitted to the hospital, it is determined that she has 102 cells/mL of P. aeruginosa in her blood. If she has 3.9 L of blood in her body,

2) How many total bacterial cells are in her blood at the time she is rushed to the hospital? (0.75pts)

3) How many generations have the bacteria been through from the time the cells entered her blood until she arrived at the hospital?

4) How many days have passed since the bacteria entered her blood? (Assume a constant generation time of 5 hours in blood)

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WFC 154 Lecture Notes - Lecture 13: Overexploitation

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