Poster or Presentation Title

The Jaw Mechanism of the Sheepshead Fish

Presenter Information

Hannah HargroveFollow

Location

Hall Memorial Ballroom

Access Type

Campus Access Only

Presentation Type

Poster Presentation

Start Date

4-4-2018 12:00 PM

Abstract

Feeding Biomechanics in Sheepshead, Archosargus probatocephalus

Hannah Hargrove, & Takashi Maie, Ph.D.

Abstract

Sheepshead fish, Archosargus probatocephalus, is a marine fish species with distinct black and white markings that is widely distributed off the coast of southwest Florida. The species has human-like teeth in its upper and lower jaws and is capable of crushing hard-shelled and heavily armored prey. In this study, we analyzed jaw mechanics of A. probatocephalus and estimated its bite force to gain a better understanding of its biology as it relates to tooth structure, jaw structure, and feeding mechanisms. In order to analyze bite force (both anterior and posterior bite) and jaw lever mechanics, we first dissected A. probatocephalus specimens and then collected morphological measurements from its feeding apparatus, including jaws and jaw adductor muscle. Using these morphological measurements as input variables for the anatomical model (i.e., MandibLever program), we simulated its jaw function and estimated bite forces at the anterior teeth and posterior teeth. Our study provides insights into not only the musculoskeletal basis of the jaw function in this fish species, but also its feeding capacity in relation to type of dentition, trophic ecology, and evolution of durophagy in teleosts.

Faculty Mentor

Dr. Takashi Maie

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Apr 4th, 12:00 PM

The Jaw Mechanism of the Sheepshead Fish

Hall Memorial Ballroom

Feeding Biomechanics in Sheepshead, Archosargus probatocephalus

Hannah Hargrove, & Takashi Maie, Ph.D.

Abstract

Sheepshead fish, Archosargus probatocephalus, is a marine fish species with distinct black and white markings that is widely distributed off the coast of southwest Florida. The species has human-like teeth in its upper and lower jaws and is capable of crushing hard-shelled and heavily armored prey. In this study, we analyzed jaw mechanics of A. probatocephalus and estimated its bite force to gain a better understanding of its biology as it relates to tooth structure, jaw structure, and feeding mechanisms. In order to analyze bite force (both anterior and posterior bite) and jaw lever mechanics, we first dissected A. probatocephalus specimens and then collected morphological measurements from its feeding apparatus, including jaws and jaw adductor muscle. Using these morphological measurements as input variables for the anatomical model (i.e., MandibLever program), we simulated its jaw function and estimated bite forces at the anterior teeth and posterior teeth. Our study provides insights into not only the musculoskeletal basis of the jaw function in this fish species, but also its feeding capacity in relation to type of dentition, trophic ecology, and evolution of durophagy in teleosts.