Presentation Title

Developmental Changes of Skeletal Muscle Fiber Type Composition in Baleen Whales

Faculty Mentor

Cori Newton, Rachel Cartwright, Charles Sackerson

Start Date

18-11-2017 2:15 PM

End Date

18-11-2017 3:15 PM

Location

BSC-Ursa Minor 78

Session

Poster 3

Type of Presentation

Poster

Subject Area

biological_agricultural_sciences

Abstract

As part of the development of marine mammals, they must acquire the capacity to hold their breath for diving and foraging purposes. Various adaptations that extend energy production via aerobic and anaerobic respiration are thought to enhance dive time of marine mammals. Previous work has shown that the use of anaerobic metabolism for energy production varies between Baleen whale species and age groups. To provide further insight into the distinct dive profiles of these whales, this study focuses on the fiber type composition of their muscle tissue. Muscle fibers are categorized into two types: type I (slow twitch) and type II (fast twitch), which are generally considered aerobic or anaerobic respectively. In order to differentiate between the fiber types in a tissue sample, an immunohistochemical method was used to quantify muscle fiber type composition of three different Baleen whale species (Gray, Minke, and Humpback) at various age groups.

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Nov 18th, 2:15 PM Nov 18th, 3:15 PM

Developmental Changes of Skeletal Muscle Fiber Type Composition in Baleen Whales

BSC-Ursa Minor 78

As part of the development of marine mammals, they must acquire the capacity to hold their breath for diving and foraging purposes. Various adaptations that extend energy production via aerobic and anaerobic respiration are thought to enhance dive time of marine mammals. Previous work has shown that the use of anaerobic metabolism for energy production varies between Baleen whale species and age groups. To provide further insight into the distinct dive profiles of these whales, this study focuses on the fiber type composition of their muscle tissue. Muscle fibers are categorized into two types: type I (slow twitch) and type II (fast twitch), which are generally considered aerobic or anaerobic respectively. In order to differentiate between the fiber types in a tissue sample, an immunohistochemical method was used to quantify muscle fiber type composition of three different Baleen whale species (Gray, Minke, and Humpback) at various age groups.