Skip to page content
  • Go to the main menu
  • Go to the search form
Metro

Main menu

▼
Open menu
▲
Close menu
  • Parks + Venues
    +
    Open this submenu
    −
    Close this submenu
    • Parks
      +
      Open this submenu
      −
      Close this submenu
      • Oxbow Regional Park
        +
        Open this submenu
        −
        Close this submenu
        • Camping at Oxbow
      • Blue Lake Regional Park
      • Smith and Bybee Wetlands Natural Area
      • Graham Oaks Nature Park
      • Cooper Mountain Nature Park
      • Mount Talbert Nature Park
      • Scouters Mountain Nature Park
      • Chehalem Ridge Nature Park
      • Canemah Bluff Nature Park
      • Newell Creek Canyon Nature Park
      • Orenco Woods Nature Park
      • Killin Wetlands Nature Park
      • Howell Territorial Park
      • Mason Hill Park
      • Broughton Beach
      • Glendoveer Golf Course and Nature Trail
      • Farmington Paddle Launch
      • Boat ramps
        +
        Open this submenu
        −
        Close this submenu
        • Chinook Landing Marine Park
        • M. James Gleason Memorial Boat Ramp
        • Sauvie Island Boat Ramp
      • Disc golf course

      • Parks and nature activities
        +
        Open this submenu
        −
        Close this submenu
        • Guided nature activities
        • Nature learning resources
      • Picnics and special use
        +
        Open this submenu
        −
        Close this submenu
        • Picnics at Blue Lake
        • Picnics at Oxbow
        • Picnics at Graham Oaks
        • Picnics at Mount Talbert
        • Picnics at Scouters Mountain
        • Picnics at Chehalem Ridge
        • Caterers and amusement providers
        • Special use permits
      • Water safety
      • Pets policy
      • Hunting policy
    • Venues
      +
      Open this submenu
      −
      Close this submenu
      • Oregon Convention Center
        +
        Open this submenu
        −
        Close this submenu
        • Oregon Convention Center hotel
          +
          Open this submenu
          −
          Close this submenu
          • Jobs and job training
          • Economic impact
          • Global reach
          • Hotel progress
      • Oregon Zoo
      • Portland Expo Center
      • Portland'5 Centers for the Arts
    • Historic cemeteries
      +
      Open this submenu
      −
      Close this submenu
      • Services and fees
      • Visit the cemeteries
      • History of Metro's cemeteries

      • Brainard Cemetery
      • Columbia Pioneer Cemetery
      • Douglass Cemetery
      • Escobar Cemetery
      • Grand Army of the Republic Cemetery
      • Gresham Pioneer Cemetery
      • Jones Cemetery
      • Lone Fir Cemetery
        +
        Open this submenu
        −
        Close this submenu
        • Chestnut Grove Memorial Garden
      • Mountain View Corbett Cemetery
      • Mountain View Stark Cemetery
      • Multnomah Park Cemetery
      • Pleasant Home Cemetery
      • Powell Grove Cemetery
      • White Birch Cemetery
    • man and boy walking on trail at Oxbow Regional Park
      Buy a parks pass
  • Tools + Services
    +
    Open this submenu
    −
    Close this submenu
    • Tools for Living
      +
      Open this submenu
      −
      Close this submenu
      • Garbage and recycling
        +
        Open this submenu
        −
        Close this submenu
        • Find a recycler
        • Find your hauler
        • Metro Central transfer station
        • Metro South transfer station
          +
          Open this submenu
          −
          Close this submenu
          • Metro South trash cam
        • Code of conduct
        • Prep your load and pay less
        • Recycling at home
          +
          Open this submenu
          −
          Close this submenu
          • Home recycling collection
          • Glass
          • Metal
          • Plastic
          • Paper
          • Christmas tree recycling
        • Reducing waste at home
          +
          Open this submenu
          −
          Close this submenu
          • Waste-wise holidays
          • Stop junk mail
          • Back to school tips
        • Neighborhood collection events
          +
          Open this submenu
          −
          Close this submenu
          • 2025 neighborhood collection event schedule
        • Report dumped garbage
          +
          Open this submenu
          −
          Close this submenu
          • RID Patrol work transition program
        • Ask an expert
      • Healthy home
        +
        Open this submenu
        −
        Close this submenu
        • Household hazardous waste disposal
          +
          Open this submenu
          −
          Close this submenu
          • Adhesives and glues
          • Aerosols
          • Air fresheners and deodorizers
          • Ammunition
          • Antifreeze
          • Arts and crafts supplies
          • Asbestos
          • Batteries, auto
          • Batteries, household
          • Bleach
          • Brake fluid
          • Carpet and rug cleaners
          • Chemistry sets
          • Cleaners, all-purpose
          • Degreasers
          • Detergents, dishwashing or laundry
          • Disinfectants
          • Drain cleaners
          • Fertilizers, chemical
          • Fingernail polish and remover
          • Flea control
          • Gasoline, kerosene and diesel fuel
          • Hair products
          • Hand cleaners, mechanic or painter
          • Lighter fluid, charcoal
          • Lubricating oils
          • Medicines, unwanted or expired drugs
          • Mercury- and PCB-containing items
          • Moss killer
          • Mothballs and moth crystals
          • Motor oil and oil filters
          • Oven cleaners
          • Paint and clear wood finish
          • Paint strippers or paint scrapings
          • Paint thinners
          • Paint, water-based
          • Pesticides
          • Photographic chemicals
          • Polishes and cleaners, metal
          • Polishes and waxes, wood furniture and floors
          • Polishes, cleaners or waxes, automotive
          • Polishes, shoe
          • Pool or spa chemicals
          • Septic tank cleaners
          • Smoke detectors, ionizing type
          • Soot remover or creosote destroyer
          • Stain and spot removers
          • Transmission fluid
          • Windshield wiper solution
          • Wood preservatives
        • Green cleaning
          +
          Open this submenu
          −
          Close this submenu
          • Air fresheners and deodorizers
          • All-purpose cleaners
          • Aluminum cleaners
          • Antiseptic soap spray
          • Bathroom soft scrub
          • Bronze, brass and copper cleaner
          • Chrome cleaner
          • Coffee maker cleaner
          • Countertop and appliance top cleaner
          • Dish soap
          • Disinfectants
          • Drain cleaner
          • Floor cleaners
          • Glass and window cleaners
          • Hand cleaner
          • Laundry bleach
          • Laundry cleaners
          • Leather cleaner
          • Oven cleaners
          • Scouring powder and paste
          • Silver cleaners
          • Spot and stain removers
          • Toilet bowl cleaners
          • Tub and tile cleaner
          • Urine stain removers
          • Wall cleaner
          • Wallpaper cleaner
          • Wet spotter
          • Windshield wiper fluid
          • Wood cleaners
          • Wood furniture polish
        • Home pest control
          +
          Open this submenu
          −
          Close this submenu
          • Ants
          • Asthma, pests and pesticides
          • Cockroaches
          • Fleas and ticks
          • Fruit flies
          • Mice and rats
          • Moths
          • Spiders
        • Buying safer cleaners
        • Safe personal care products
        • Storm and fire cleanup
        • Online learning
        • MetroPaint
          +
          Open this submenu
          −
          Close this submenu
          • Retail locations
          • Colors and product information
          • MetroPaint Outlet
          • MetroPaint virtual painter
            +
            Open this submenu
            −
            Close this submenu
            • Living room
            • Bedroom
            • Dining room
            • Entrance
            • Upload a photo
      • Yard and garden
        +
        Open this submenu
        −
        Close this submenu
        • Learning gardens
        • Garden basics
          +
          Open this submenu
          −
          Close this submenu
          • Soil amendments
          • Mulch matters
          • Soil prep for your edible garden
          • Watering tips
        • Garden problems
          +
          Open this submenu
          −
          Close this submenu
          • Azalea lace bug
          • Aphids
          • Cabbage butterflies and leaf miners
          • Mosquitoes
          • Moles, voles and gophers
          • Slugs and snails
          • Yellowjackets
          • Wildlife issues
          • Lawn moss
          • Black spot, rust and rot
          • Powdery mildew
          • Weeds
          • Proper disposal of pesticides
        • Lawn
          +
          Open this submenu
          −
          Close this submenu
          • Mow
          • Grow
          • Water
          • Weed
          • Lawn alternatives
        • Plants
          +
          Open this submenu
          −
          Close this submenu
          • Native plants
          • Plant a shrub
          • Plant a tree
          • Fall and winter gardening
          • Growing roses
          • Getting started with edibles
        • Backyard habitat
          +
          Open this submenu
          −
          Close this submenu
          • Beneficial bugs
          • Pollinators
          • Protecting songbirds
          • Feeding and caring for wildlife
        • Composting
          +
          Open this submenu
          −
          Close this submenu
          • Composting methods
          • Tips for composting success
          • Compost trouble-shooting
          • Build a compost bin
          • Worm composting
          • Worm bin trouble-shooting
        • Grow Smart, Grow Safe
        • Garden pledge
    • Tools for working
      +
      Open this submenu
      −
      Close this submenu
      • Asbestos information for transfer station customers
      • Guide to construction salvage and recycling
      • Guide to managing paint waste
      • Guide to recycling and waste reduction at work
        +
        Open this submenu
        −
        Close this submenu
        • Guide to choosing single-use service ware
      • Business hazardous waste disposal program
        +
        Open this submenu
        −
        Close this submenu
        • Business hazardous waste disposal signup
      • Reducing food waste
        +
        Open this submenu
        −
        Close this submenu
        • Preventing food waste
        • Donating food
        • Composting food scraps
          +
          Open this submenu
          −
          Close this submenu
          • Composting options outside the Portland metropolitan area
        • Food scraps separation policy
        • Local success stories
      • Regional contractor's business license
        +
        Open this submenu
        −
        Close this submenu
        • Contractor's business license application and renewal
        • Contractor's business license lookup
      • Tools for haulers and facility operators
        +
        Open this submenu
        −
        Close this submenu
        • Accounts for haulers
        • Construction waste
        • Special waste disposal
        • Regional solid waste facilities
        • Forms for solid waste facilities
        • Rules, procedures and guidance
        • Solid Waste Information System
        • Solid waste authorizations
          +
          Open this submenu
          −
          Close this submenu
          • Solid waste facility complaint form
          • License for Grimm’s Fuel Company
            +
            Open this submenu
            −
            Close this submenu
            • Updates
        • Solid waste enforcement
        • Public notices for garbage and recycling facilities
      • Travel options for employers
    • Tools for Partners
      +
      Open this submenu
      −
      Close this submenu
      • Grants and resources
        +
        Open this submenu
        −
        Close this submenu
        • 2040 planning and development grants
          +
          Open this submenu
          −
          Close this submenu
          • Past grant cycles
        • Brownfields assessment grants
          +
          Open this submenu
          −
          Close this submenu
          • Background
        • Civic engagement grants
        • Climate pollution reduction planning grants
        • Community enhancement grants
          +
          Open this submenu
          −
          Close this submenu
          • Metro Central Enhancement Grants
        • Community Placemaking grants
          +
          Open this submenu
          −
          Close this submenu
          • How to apply
          • 2023 grantees
          • 2022 grantees
          • 2021 grantees
          • 2020 grantees
          • 2019 grantees
          • 2018 grantees
          • 2017 grantees
        • Cooling corridors study
        • Housing and homelessness resources
        • Investment and Innovation grants
          +
          Open this submenu
          −
          Close this submenu
          • Past grant cycles
        • Landlord incentives
        • Large-scale community visions
        • Local share
        • Nature grants
          +
          Open this submenu
          −
          Close this submenu
          • Capital grants
          • Community choice grants
          • Community stewardship and restoration grants
          • Nature education grants
        • Parks and Nature community partnerships
        • Partnerships and social innovation program
        • Regional Refresh Fund
          +
          Open this submenu
          −
          Close this submenu
          • Frequently asked questions
        • Regional Travel Options program
          +
          Open this submenu
          −
          Close this submenu
          • Safe Routes to School program
            +
            Open this submenu
            −
            Close this submenu
            • Safe Routes to School safety campaign toolkit
        • Transit-Oriented Development Program
      • Guides and tools
        +
        Open this submenu
        −
        Close this submenu
        • Community Investment Toolkit
        • Designing livable streets and trails
          +
          Open this submenu
          −
          Close this submenu
          • Conversations about performance-based design
        • Economic Value Atlas
        • Greater Portland Economic Recovery Plan
        • Guide to equitable housing
          +
          Open this submenu
          −
          Close this submenu
          • Build Small Coalition
        • Jurisdictional transfer assessment
        • Local transportation system plans
        • Mobility Corridors Atlas
        • Planning parks with communities of color
        • Regional Traffic and Transportation Class
        • Safe Routes to School Framework
        • Site readiness toolkit
        • Social Vulnerability Explorer
      • Education resources
        +
        Open this submenu
        −
        Close this submenu
        • Resource conservation and recycling education
          +
          Open this submenu
          −
          Close this submenu
          • Elementary school classroom presentations
          • Middle and high school classroom presentations
          • Distance learning
            +
            Open this submenu
            −
            Close this submenu
            • Elementary online learning
            • Middle and high school online learning
            • Community and family online education
          • Publication library
          • Community workshops and events
          • Meet the educators
      • Data Resource Center
        +
        Open this submenu
        −
        Close this submenu
        • RLIS Live
        • MetroMap
        • Aerial photography
          +
          Open this submenu
          −
          Close this submenu
          • Regional Aerial Photo Consortium
        • Unmanned Aircraft System program
        • Annexation and boundary changes
          +
          Open this submenu
          −
          Close this submenu
          • Annexation search tool
    • Small thumbnail of a Metro map
      Regional Land Information System
  • What's Happening
    +
    Open this submenu
    −
    Close this submenu
    • Metro News
      +
      Open this submenu
      −
      Close this submenu
      • All Metro news
      • Housing news
      • Land and transportation news
      • Parks and nature news
      • Home and garbage news
      • Venues news
      • Resources for journalists
    • Public projects
      +
      Open this submenu
      −
      Close this submenu
      • Willamette Cove cleanup and nature park
        +
        Open this submenu
        −
        Close this submenu
        • Background
        • Site history
        • Park planning
        • The cleanup
      • Future of Supportive Housing Services
      • Tualatin Valley Highway transit project
        +
        Open this submenu
        −
        Close this submenu
        • Background
        • Community engagement
        • Equitable development
        • Steering committee
      • 2024 growth management decision
        +
        Open this submenu
        −
        Close this submenu
        • Background
        • Expansion proposal
        • Roundtable
        • Youth cohort
      • Regional housing coordination strategy
        +
        Open this submenu
        −
        Close this submenu
        • Background
      • Expo Future project
        +
        Open this submenu
        −
        Close this submenu
        • Phase two
        • Development information
        • Project background
        • Site history
      • Blue Lake Regional Park improvements
        +
        Open this submenu
        −
        Close this submenu
        • Background
        • Project updates
        • Timeline
      • Affordable housing bond program
        +
        Open this submenu
        −
        Close this submenu
        • Progress
        • Site acquisition
        • Background
        • Racial equity
        • Oversight
        • Common questions
      • Supportive housing services
        +
        Open this submenu
        −
        Close this submenu
        • Progress
        • Racial equity
        • Regional coordination
        • Funding
        • Oversight
        • Stories
        • Common questions
      • Supportive housing services tax
        +
        Open this submenu
        −
        Close this submenu
        • Tax preparer resources
        • Tax data and analysis
        • Codes and rules
      • 2028-30 Regional flexible funding allocation
        +
        Open this submenu
        −
        Close this submenu
        • Background
        • Funding priorities
        • New project bond
        • Step 2
      • 82nd Avenue transit project
        +
        Open this submenu
        −
        Close this submenu
        • Background
        • Development strategy
        • Steering committee
      • Community connector transit study
      • Regional Transportation Demand Management strategy
        +
        Open this submenu
        −
        Close this submenu
        • Regional goals
        • Timeline
      • Honoring untold stories at Lone Fir Cemetery
        +
        Open this submenu
        −
        Close this submenu
        • Community engagement
        • Timeline
        • Patient recognition
      • Parks and nature investments
        +
        Open this submenu
        −
        Close this submenu
        • About
        • History
        • Funding
        • Vision
        • Equity
        • Oversight
        • Leadership
      • Regional system facilities plan
        +
        Open this submenu
        −
        Close this submenu
        • Background
        • Engagement
        • Values and outcomes
        • Gap analysis
        • Scenario development
        • Draft plan
      • Bulky Waste collection service improvements
        +
        Open this submenu
        −
        Close this submenu
        • Bulky waste policy
        • Collection study
      • Metro's commitment to Black lives
        +
        Open this submenu
        −
        Close this submenu
        • Policing
    • Calendar
      +
      Open this submenu
      −
      Close this submenu
      • calendar pictogram
        View meetings and events
    • Subscribe
      +
      Open this submenu
      −
      Close this submenu
      • newspaper pictogram
        Get news by email
  • About Metro
    +
    Open this submenu
    −
    Close this submenu
    • Regional leadership
      +
      Open this submenu
      −
      Close this submenu
      • What is Metro?
        +
        Open this submenu
        −
        Close this submenu
        • Cities and counties in the region
      • Metro Council
        +
        Open this submenu
        −
        Close this submenu
        • Council President Lynn Peterson
        • Councilor Ashton Simpson
        • Councilor Christine Lewis
        • Councilor Gerritt Rosenthal
        • Councilor Juan Carlos González
        • Councilor Mary Nolan
        • Councilor Duncan Hwang

        • How to give testimony
        • Find your councilor
      • Metro Auditor
        +
        Open this submenu
        −
        Close this submenu
        • About the Metro Auditor
          +
          Open this submenu
          −
          Close this submenu
          • Mission and authority
          • Process
          • Auditing standards
          • Audit Committee
        • Audits
          +
          Open this submenu
          −
          Close this submenu
          • Audit recommendations
        • Accountability Hotline
      • Metropolitan Exposition Recreation Commission
        +
        Open this submenu
        −
        Close this submenu
        • Commissioners
        • Materials archive
      • Metro advisory committees
        +
        Open this submenu
        −
        Close this submenu
        • Committee on Disability Inclusion
        • Committee on Racial Equity
        • Future Vision Commission
        • Joint Policy Advisory Committee on Transportation
          +
          Open this submenu
          −
          Close this submenu
          • How to give testimony
          • Meeting materials archive
        • Metro Policy Advisory Committee
          +
          Open this submenu
          −
          Close this submenu
          • How to give testimony
          • Meeting materials archive
        • Metro Technical Advisory Committee
        • Public Engagement Review Committee
        • Regional Waste Advisory Committee
        • Smith and Bybee Wetlands Advisory Committee
        • Transit-Oriented Development Steering Committee
        • Transportation Policy Alternatives Committee
          +
          Open this submenu
          −
          Close this submenu
          • TPAC materials archive
          • TransPort
      • Diversity, equity and inclusion
        +
        Open this submenu
        −
        Close this submenu
        • Know your rights
          +
          Open this submenu
          −
          Close this submenu
          • Complaint procedures
        • Accessibility at Metro
          +
          Open this submenu
          −
          Close this submenu
          • ADA public notice
          • Request an accommodation
          • Accessibility projects
          • Website accessibility
          • ADA grievance procedure
            +
            Open this submenu
            −
            Close this submenu
            • File an ADA complaint
        • Language hub
          +
          Open this submenu
          −
          Close this submenu
          • Arabic
          • Cambodian
          • Chinese
          • Hindi
          • Hmong
          • Japanese
          • Korean
          • Laotian
          • Nepali
          • Persian
          • Romanian
          • Russian
          • Somali
          • Spanish
          • Tagalog
          • Telugu
          • Thai
          • Ukrainian
          • Vietnamese
        • Public engagement
        • Equity strategy
        • Equity Dashboard
          +
          Open this submenu
          −
          Close this submenu
          • Workforce demographics
          • Job classifications
          • Employment status
          • Payscale
          • Recruitment
          • Retention
        • Construction Career Pathways
      • Public records
    • How Metro works
      +
      Open this submenu
      −
      Close this submenu
      • Organizational structure
      • Finances and funding
        +
        Open this submenu
        −
        Close this submenu
        • Financial reports
        • Metro budget
        • Property tax information
        • Income tax information
        • Investment Advisory Board
      • Metro Code
        +
        Open this submenu
        −
        Close this submenu
        • Metro administrative rules
      • Green Metro
        +
        Open this submenu
        −
        Close this submenu
        • Green Metro featured projects
      • Contract opportunities
        +
        Open this submenu
        −
        Close this submenu
        • Current requests for bids and proposals
        • Doing business with Metro
          +
          Open this submenu
          −
          Close this submenu
          • Large construction contracts
        • Equity in contracting
      • Jobs
        +
        Open this submenu
        −
        Close this submenu
        • How to apply
        • Benefits
        • Pay
          +
          Open this submenu
          −
          Close this submenu
          • Classification descriptions
        • Labor unions
        • Diversity and equity
        • Training and development
        • Veterans' preference
        • First Opportunity program
        • Internships
          +
          Open this submenu
          −
          Close this submenu
          • Applying for internships
          • Types of internships
          • Garbage and recycling internships
        • Variable hour jobs
    • Library
      +
      Open this submenu
      −
      Close this submenu
      • Land use shelf
      • Transportation shelf
      • Nature shelf
      • Garbage and recycling shelf
      • Regional research shelf
      • Archives and special collections
    • photo of boats at Blue Lake
      Metro by the numbers

Search form

Metro News

Subscribe
 
  • नेपाली

Quantifying happiness: The science of animal welfare

Metro logo

Quantifying happiness: The science of animal welfare

By Marcia Sinclair
March 25, 2015 2:47 p.m.

Bylined writers are Metro staff. Stories with a byline do not necessarily represent the opinions of Metro or the Metro Council. Metro News is committed to transparency, fairness and accuracy.

Oregon Zoo researchers are helping to establish measures of well-being for animals

At a newly remodeled space inside a former Oregon Zoo animal clinic, a small group of researchers and volunteers is attempting to identify what makes life worth living.

Led by Dr. Nadja Wielebnowski, the zoo’s conservation and research manager, this team is working to establish a set of tools and measures to help staff assess the well-being of the animals in their care.

"Animals can’t tell us what they are feeling," Wielebnowski said. "But they do communicate their needs in a variety of ways. Our research team is working to establish a number of indicators that collectively tell us what an animal is experiencing and provide us with a way to assess an animal’s overall quality of life."

The project got a boost earlier this year with the hiring of a dedicated staff member, Dr. Candace Scarlata, a position made possible by a grant from the Oregon Zoo Foundation. In addition to funding Scarlata’s position, the foundation helped equip the new lab to allow for more advanced monitoring of hormone levels — one indicator of an animal’s well-being.

Hormones are chemical messengers in the bloodstream and tissues that trigger a wide variety of processes in the body. Some — such as glucocorticoids, or "stress hormones" — can provide insight into an animal’s psychological state. Tracking the levels of glucocorticoids over time and under varied circumstances helps reveal how an animal is responding to its surroundings and activities.

Stress, Wielebnowski points out, is not inherently bad.

"Some stressful activities, such as introductions to other animals or mating, are stimulating and challenging in a good way," Wielebnowski said. "We need to interpret our data carefully and use multiple measures to understand when good stimulating stressors become negative stressors that may result in distress or chronic stress."

Scarlata, the dedicated staff member in the zoo’s new lab, said it’s important to know that endocrine research does not assume that animals in zoos are unhappy.

"We know that many species do experience positive well-being in captive conditions where food is plentiful and predation is eliminated," she said. "But we are always seeking new ways to enrich or improve their lives."

Examples of such improvements can be anything from adding hiding spots and climbing structures in zoo enclosures to increasing enclosure size or changing the distance of the animals from humans visiting the zoo.

"There is much we do not know about animal psychology," Scarlata said. "This research is one way we can ensure good welfare in all animals under our care for its own sake."

Dr. Janine L. Brown, a reproductive physiologist at the Smithsonian Conservation Biology Institute’s Center for Species Survival, said the new lab at the Oregon Zoo fills an important niche in the scientific community.

"Reproduction and welfare are key to species survival, and associated endocrinological studies are fundamental to understanding how an individual, population or entire species perpetuates itself," she said. "This information has applied value whether trying to maintain small populations in zoos or providing advice to authorities responsible for maintaining viable populations in nature."

Brown said nearly all endocrinological research thus far has been directed at humans and livestock, laboratory or companion animals which means the understanding of zoo animals is severely limited.

"The Oregon Zoo will fill a need to explore reproduction and well-being in wildlife more broadly, and increase our knowledge of the physiological differences among species," Brown said. "Oregon Zoo management also will benefit greatly by having a laboratory capable of assessing the fertility status of individuals, help time breeding, diagnose pregnancy, and assess the welfare outcomes of various enrichment programs."

The Oregon Zoo has monitored reproductive hormones such as testosterone and progesterone in its elephant family weekly for more than 25 years, longer than any other zoo in North America. This bank of data has led to a deeper knowledge of elephant breeding and gestation as well as male musth cycles, which helps animal-care staff better understand and meet the needs of both individual elephants and the herd.  Published widely in scientific journals, the zoo’s findings have informed Asian elephant management worldwide.

Wielebnowski, Scarlata and their team will soon begin monitoring a wider variety of hormones including glucocorticoids. Coupled with physical health and behavior observations, the hormone data is expected to provide animal-care staff with a more well-rounded understanding of each animal’s physical and mental well-being.

"Each animal has a unique history and set of life experiences," Wielebnowski said. "We can establish the basic standards of care for every animal but we still need to adapt the setting and daily routine to the needs of each animal. Regular hormone and behavior monitoring can help us establish some of these needs."

 

Footer Menu

▼
Open menu
▲
Close menu
  • Services of Metro
    +
    Open this submenu
    −
    Close this submenu
    • Oregon Zoo
    • Oregon Convention Center
    • Portland Expo Center
    • Portland'5 Centers for the Arts
    • Data Resource Center
    • Garbage and recycling facilities
    • Metro cemeteries
  • Opportunities
    +
    Open this submenu
    −
    Close this submenu
    • Jobs
    • Contracts
    • Grants
    • Franchising and licensing
  • Access
    +
    Open this submenu
    −
    Close this submenu
    • Know your rights
    • Accessibility at Metro
    • Language assistance
    • Feedback and questions
    • Metro Accountability Hotline
    • Privacy policy
    • Request public records
    • Directions
  • Leadership
    +
    Open this submenu
    −
    Close this submenu
    • Metro Council
    • Metro Auditor
    • MERC
    • Committees
    • Who's my councilor?

Metro logo

Whether your roots in the region run generations deep or you moved to Oregon last week, you have your own reasons for loving this place – and Metro wants to keep it that way. Help shape the future of the greater Portland region and discover tools, services and places that make life better today.

Contact Metro

  • 503-797-1700
  • 503-797-1804 TDD
  • Send a message

Connect with Metro

Subscribe to Metro News

More subscription options

Find Metro on

Facebook Twitter YouTube LinkedIn Instagram