Title: A Population Model for Sea Otters in Western PWS
Project Year and Number: 1993: 93043
Other Fiscal Years and Numbers for this Project: 1993: 93043-2
Principal Investigator (PI): Mark Udevitz, US Geological Survey
Research Location: Prince William Sound
Restoration Category: Monitoring
Injured Resources Addressed: Sea Otters
Abstract: Immediate sea otter losses associated with the EVOS probably ranged from 3,000 to 5,000 animals. Sampling of sediments and sea otter prey items indicates that the exposure of otters to petroleum hydrocarbons may be continuing, affecting the survival and therefore the recovery of the population.
As a continuation of work conducted in 1991 and 1992, this project will conduct population surveys of sea otters in the Prince William Sound using aerial surveying. Due to the identification of bias resulting in the boat surveys, aerial survey method began to be developed in 1991. A Global Positioning System (GPS) was used in the aircraft to locate the endpoints of each transect. Concentric circles within the width of the survey transect were flown, and data was collected.
Continued survey development includes the investigation of two methods for increasing the sample size of intensive search units. Prince William Sound will be partitioned into 400 km-wide strip transects divided into 2 strata, feeding and non-feeding habitat. Data collected using aerial survey will be entered into a database.
Mortality patterns will be evaluated through the recovery of sea otter carcasses surveyed on beaches in Prince William Sound. A Leslie matrix model for males and females will be constructed to model the sea otter population to predict recovery. Habitat use patterns will be analyzed.
Prince William Sound
Marine Mammals - Sea Otters
|Fields of Expertise||
Proposal: PDF Not Available
Funding Recommendations: View
Funding Detail For: 1993
Quarterly Project Tasks For: 1993
Annual Report: 1993: Not Applicable
Final Report: View
Publications from this Project: None Available
More information may be available for this project under other years:
We continue to populate our database to make all of our project information available online. If you would like more information on any project listed below, please contact us and we can search our files for the information you request.
|Project Number||Proposal||Annual Reports||Final Report||Data|
|1993: 93043-2||Not Available||
||View||See Project 93043|