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Articles 1 - 8 of 8
Full-Text Articles in Marine Biology
Skeletal Anatomy Of The Pectoral Fin In Mudskipper Species From Terrestrial And Aquatic Habitats, Haodong Zhou, Cassandra M. Donatelli, Odette Laneuville, Emily M. Standen
Skeletal Anatomy Of The Pectoral Fin In Mudskipper Species From Terrestrial And Aquatic Habitats, Haodong Zhou, Cassandra M. Donatelli, Odette Laneuville, Emily M. Standen
Engineering Faculty Articles and Research
Mudskippers are a group of amphibious fishes in the family Oxudercidae, whose species inhabit a range of habitats from mostly aquatic to mostly terrestrial. Most of our understanding about habitat preference comes from natural history observations, particularly where they are collected (i.e., low intertidal vs. high intertidal regions). Mudskippers have undergone several morphological changes to accommodate a terrestrial life, including major changes to the pectoral and pelvic girdles. These changes result in a novel crutching gait, which mudskippers use to move over land. Though the appendicular morphology and crutching gait of mudskippers have been described in some species, few …
It Pays To Be Bumpy: Drag Reducing Armor In The Pacific Spiny Lumpsucker, Eumicrotremus Orbis, R. C. Hoover, Olivia H. Hawkins, Jack Rosen, Conrad D. Wilson, Callie H. Crawford, Meghan Holst, Jonathan M. Huie, Adam P. Summers, Cassandra M. Donatelli, Karly E. Cohen
It Pays To Be Bumpy: Drag Reducing Armor In The Pacific Spiny Lumpsucker, Eumicrotremus Orbis, R. C. Hoover, Olivia H. Hawkins, Jack Rosen, Conrad D. Wilson, Callie H. Crawford, Meghan Holst, Jonathan M. Huie, Adam P. Summers, Cassandra M. Donatelli, Karly E. Cohen
Engineering Faculty Articles and Research
Armor is a multipurpose set of structures that has evolved independently at least 30 times in fishes. In addition to providing protection, armor can manipulate flow, increase camouflage, and be sexually dimorphic. There are potential tradeoffs in armor function: increased impact resistance may come at the cost of maneuvering ability; and ornate armor may offer visual or protective advantages, but could incur excess drag. Pacific spiny lumpsuckers (Eumicrotremus orbis) are covered in rows of odontic, cone-shaped armor whorls, protecting the fish from wave driven impacts and the threat of predation. We are interested in measuring the effects of …
Internal Vertebral Morphology Of Bony Fishes Matches The Mechanical Demands Of Different Environments, Dana Baxter, Karly E. Cohen, Cassandra M. Donatelli, Eric D. Tytell
Internal Vertebral Morphology Of Bony Fishes Matches The Mechanical Demands Of Different Environments, Dana Baxter, Karly E. Cohen, Cassandra M. Donatelli, Eric D. Tytell
Engineering Faculty Articles and Research
Fishes have repeatedly evolved characteristic body shapes depending on how close they live to the substrate. Pelagic fishes live in open water and typically have narrow, streamlined body shapes; benthic and demersal fishes live close to the substrate; and demersal fishes often have deeper bodies. These shape differences are often associated with behavioral differences: pelagic fishes swim nearly constantly, demersal fishes tend to maneuver near the substrate, and benthic fishes often lie in wait on the substrate. We hypothesized that these morphological and behavioral differences would be reflected in the mechanical properties of the body, and specifically in vertebral column …
Interspecific Differences In The Flow Regimes And Drag Of North Pacific Skate Egg Cases, Kayla C. Hall, Jaida N. Elcock, Gerald R. Hoff, Duane E. Stevenson, Adam P. Summers, Cassandra M. Donatelli
Interspecific Differences In The Flow Regimes And Drag Of North Pacific Skate Egg Cases, Kayla C. Hall, Jaida N. Elcock, Gerald R. Hoff, Duane E. Stevenson, Adam P. Summers, Cassandra M. Donatelli
Engineering Faculty Articles and Research
Skates are a diverse group of dorso-ventrally compressed cartilaginous fishes found primarily in high-latitude seas. These slow-growing oviparous fishes deposit their fertilized eggs into cases, which then rest on the seafloor. Developing skates remain in their cases for 1-4 years after they are deposited, meaning the abiotic characteristics of the deposition sites, such as current and substrate type, must interact with the capsule in a way to promote long residency. Egg cases are morphologically variable and can be identified to species. Both the gross morphology and the microstructures of the egg case interact with substrate to determine how well a …
Body And Tail Coordination In The Bluespot Salamander (Ambystoma Laterale) During Limb Regeneration, Cassandra M. Donatelli, Keegan Lutek, Keshav Gupta, Emily M. Standen
Body And Tail Coordination In The Bluespot Salamander (Ambystoma Laterale) During Limb Regeneration, Cassandra M. Donatelli, Keegan Lutek, Keshav Gupta, Emily M. Standen
Engineering Faculty Articles and Research
Animals are incredibly good at adapting to changes in their environment, a trait envied by most roboticists. Many animals use different gaits to seamlessly transition between land and water and move through non-uniform terrains. In addition to adjusting to changes in their environment, animals can adjust their locomotion to deal with missing or regenerating limbs. Salamanders are an amphibious group of animals that can regenerate limbs, tails, and even parts of the spinal cord in some species. After the loss of a limb, the salamander successfully adjusts to constantly changing morphology as it regenerates the missing part. This quality is …
Three-Dimensional Movements Of The Pectoral Fin During Yaw Turns In The Pacific Spiny Dogfish, Squalus Suckleyi, Sarah L. Hoffman, Cassandra M. Donatelli, Samantha C. Leigh, Elizabeth L. Brainerd, Marianne E. Porter
Three-Dimensional Movements Of The Pectoral Fin During Yaw Turns In The Pacific Spiny Dogfish, Squalus Suckleyi, Sarah L. Hoffman, Cassandra M. Donatelli, Samantha C. Leigh, Elizabeth L. Brainerd, Marianne E. Porter
Engineering Faculty Articles and Research
Fish pectoral fins move in complex ways, acting as control surfaces to affect force balance during swimming and maneuvering. Though objectively less dynamic than their actinopterygian relatives, shark pectoral fins undergo complex conformational changes and movements during maneuvering. Asynchronous pectoral fin movement is documented during yaw turning in at least two shark species but the three-dimensional (3D) rotation of the fin about the body axes is unknown. We quantify the 3D actuation of the pectoral fin base relative to the body axes. We hypothesized that Pacific spiny dogfish rotate pectoral fins with three degrees of freedom relative to the body …
Meral Spot Total Reflectance Signals Weapon Performance In The Mantis Shrimp Neogonodactylus Oerstedii (Stomatopoda), Amanda M. Franklin, Cassandra M. Donatelli, Casey R. Culligan, Eric D. Tytell
Meral Spot Total Reflectance Signals Weapon Performance In The Mantis Shrimp Neogonodactylus Oerstedii (Stomatopoda), Amanda M. Franklin, Cassandra M. Donatelli, Casey R. Culligan, Eric D. Tytell
Engineering Faculty Articles and Research
During animal contests over resources, opponents often signal their fighting ability in an attempt to avoid escalating to physical attack. A reliable signal is beneficial to receivers because it allows them to avoid injuries from engaging in contests they are unlikely to win. However, a signaler could benefit from deceiving an opponent by signaling greater fighting ability or greater aggressive intent than the signaler possesses. Therefore, the reliability of agonistic signals has long intrigued researchers. We investigated whether a colored patch, the meral spot, signals weapon performance in the stomatopod Neogonodactylus oerstedii. During fights over possession of refuges, stomatopods can …
Prototype Of A Fish Inspired Swimming Silk Robot, Cassandra M. Donatelli, Sarah A. Bradner, Juanita Mathews, Erin Sanders, Casey R. Culligan, David Kaplan, Eric D. Tytell
Prototype Of A Fish Inspired Swimming Silk Robot, Cassandra M. Donatelli, Sarah A. Bradner, Juanita Mathews, Erin Sanders, Casey R. Culligan, David Kaplan, Eric D. Tytell
Engineering Faculty Articles and Research
Elongate fishes have evolved hundreds of times throughout the tree of life. They occupy many aquatic environments, from streams and ponds to the deepest parts of the ocean. Due to their long body and numerous vertebrae, they are also highly flexible animals, which makes them useful as bioinspiration for designs in the field of soft robotics. We present a biodegradable soft robot prototype, inspired by elongate fishes. The robot's body is primarily composed of a silk hydrogel with embedded fibers to mimic the structure of natural fish skin. When actuated at the front, the flexible gel prototype mimics the undulatory …