TCBES Thesis Defense via Zoom - Stephanie Gayle - Event Details

UH Hilo Home > News & Events

This event has concluded and is no longer current.

This event is being held online. Password: 078981

TCBES Thesis Defense via Zoom - Stephanie Gayle

Location: Online

TCBES Master's Thesis Defense via Zoom - Stephanie Gayle
Wednesday, April 8, 2020, 12:00 PM
Location: Online Only

Join Zoom Meeting:
Meeting ID: 406 910 622

Title: Thermal Dependence of Eleutherodactylus coqui Vocalization on Windward Hawaii Island

Abstract: The invasive coqui frog (Eleutherodactylus coqui) has rapidly colonized four main Hawaiian islands and its populations have spread over large areas producing a number of negative social, ecological, and economic impacts. On Hawaii Island, populations sizes and densities are highest in the state, and the frogs occur over major tracts of coastal forests and the lower boundaries of montane wet forests at higher elevations. In their native Puerto Rico, coqui frogs are found from sea level to the top of the island (1065 m) and it is currently an open question how high coqui frog populations will eventually range on Hawaii Island. Cold temperature limitation is a strong hypothesis for the altitude distribution limitation on Hawaii Island. In this study, the thermal limitations on coqui frog calling behavior were determined in order to infer if cooler high altitude temperatures serve as a limiting condition for the continued expansion of coqui frog populations. Coqui frogs were found to stop calling around 14-15 °C at high elevation and around 19-20 °C at low elevations while normal levels of chorusing occurred around 16-17 °C and 20-21 °C at high and low elevations, respectively. Differences in mean air temperature observed between elevations were very similar for different degrees of calling activity, suggesting that higher elevation populations have acclimatized or adapted to be active under cooler conditions. In addition to low temperature, low moisture was also found to be associated with low levels of coqui frog activity. The relationship between temperature and coqui frog calling supports observations reported over smaller temperature ranges in previous studies. That is there is a strong positive relationship between temperature and temporal parameters of call acoustics (call note length, inter-note interval, and total call length), and a strong negative relationship between temperature and call note frequency. The coqui frog’s thermal tolerances imply that they can occupy habitats throughout all islands except for the alpine and summit areas and drier grassland and shrub environments. While the effects of coqui frogs on lowland ecosystems replete with non-native species have been unexpectedly modest, the frogs could have greater impact at higher elevations where native flora and fauna assemblages dominate. Such sensitive habitats should be monitored for possible unappreciated effects of higher elevation coqui frog populations

For more information, contact: 8089327573

Tags: tcbes research stephanie gayle coqui coqui frog Online Only online

What's also happening?

Week of April 5, 2020 calendar with events listings
Week of April 5, 2020Next →

TCBES Thesis Defense via Zoom - Devon Aguilar

TCBES Thesis Defense via Zoom - Stephanie Gayle

Haumana Hou Lounge - Hosted by FYE

TCBES Thesis Defense via Zoom - Angalee Kirby

Holiday observed: Good Friday

Target Shuttles - Hosted by FYE

VVP Pre-Production Workshop


Student Impact Scholarship
Apply now for a $5,000 scholarship! Wells Fargo is proud to announce the Student Impact Scholarship with $1 million in scholarship funds available to help support students on their educational journey. ...
Freshman 'Eleu (Fall 2020)
Freshmen, it's time to meet with your advisor for your Freshman ʻEleu appointment. Meet with your advisor between September 14 and October 6. ...
AANAPISI Scholarship
Apply for an AANAPISI scholarship from the Asian & Pacific Islander American (APIA) Scholars! Scholarship awards range from one-time $2,500 awards to multi-year $5,000 awards for the Spring 2021 semester. Deadline to apply: November 11. ...
Kanilehua Submissions Are Open
Kanilehua, UH Hilo's art and literary magazine, is now accepting submissions for its Spring 2021 issue. We are accepting submissions of literature, visual art, sheet music, and mixed medium pieces. Visit our website to submit: https://hilo. ...
Walk-in Wednesdays
Counseling services will now be offering 30 minutes walk-in sessions, every Wednesday from 1-4 pm. We know things happen and you may need to talk with someone immediately. This service is open to all UH Hilo students. ...
APIA Scholarship
Apply for a scholarship from the Asian & Pacific Islander American (APIA) Scholars! Scholarship awards range from one-time $2,500 awards to multi-year $20,000 awards for the 2021-2022 school year. Deadline to apply: January 14, 2021. ...
Hohonu Submissions are Open!
Every year, Hohonu publishes an academic journal filled with papers submitted by students. Submissions are accessed by the Hohonu staff and from there are either accepted into the editing process or denied. ...
2021-22 UH Common Scholarship App Available October 1st
The 2021-22 UH System Common Scholarship Application will be available online as of October 1, 2020. Complete the application to apply for over 100 different scholarships available to students attending UH Hilo in Fall 2021! Deadline for ...
RISO Registration for 2020-2021 is now open
The 2020-2021 academic year UH Hilo Registered Independent Student Organization (RISO) registration period is now open. The final day to register is March 26, 2021 at 4:30pm. ...
2021-22 FAFSA Available October 1st
Effective October 1, 2020, students can complete their 2021-22 Free Application for Federal Student Aid (FAFSA) online at To receive priority consideration, complete your FAFSA by February 1, 2021. ...

Disclaimer: The University of Hawaii at Hilo is not responsible for the contents, links and/or materials presented in any web site listed above that is not of the “” or “” domains. All comments, complaints and grievances should be filed with the author, host and/or owner of said site.