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- All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 (1)
- Dartmouth Scholarship (1)
- Faculty of Science - Papers (Archive) (1)
- Senior Honors Projects (1)
- Shifting Baselines and New Meridians: Water, Resources, Landscapes, and the Transformation of the American West (Summer Conference, June 4-6) (1)
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Articles 1 - 5 of 5
Full-Text Articles in Life Sciences
Decadal-Scale Changes On Coral Reefs In Quintana Roo, Mexico, Thaddeus Allen Nicholls
Decadal-Scale Changes On Coral Reefs In Quintana Roo, Mexico, Thaddeus Allen Nicholls
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
In 1988 data on coral reef community composition were collected from two areas, Akumal and Chemuyil, Quintana Roo, Mexico, ranging from 5-35m depth. These areas were revisited in 2005 and data were collected by the same methods and at the same depths as in 1988. Data from 1988 and 2005 were compared to determine if the coral reefs had undergone significant changes, and what specific changes had occurred. Chi-square analysis determined that community composition data collected in 1988 are significantly different from data collected in 2005 at all sites and depths within the categories of corals, gorgonians, sponges, and macroalgae. …
Fish Distributions And Nutrient Cycling In Streams: Can Fish Create Biogeochemical Hotspots, Peter B. Mcintyre, Alexander S. Flecker, Michael J. Vanni, James M. Hood, Brad W. Taylor, Steven A. Thomas
Fish Distributions And Nutrient Cycling In Streams: Can Fish Create Biogeochemical Hotspots, Peter B. Mcintyre, Alexander S. Flecker, Michael J. Vanni, James M. Hood, Brad W. Taylor, Steven A. Thomas
Dartmouth Scholarship
Rates of biogeochemical processes often vary widely in space and time, and characterizing this variation is critical for understanding ecosystem functioning. In streams, spatial hotspots of nutrient transformations are generally attributed to physical and microbial processes. Here we examine the potential for heterogeneous distributions of fish to generate hotspots of nutrient recycling. We measured nitrogen (N) and phosphorus (P) excretion rates of 47 species of fish in an N-limited Neotropical stream, and we combined these data with population densities in each of 49 stream channel units to estimate unit- and reach-scale nutrient recycling. Species varied widely in rates of N …
Slides: "Mitaku Oyasin" Means "We Are All Related", Bob Gough
Slides: "Mitaku Oyasin" Means "We Are All Related", Bob Gough
Shifting Baselines and New Meridians: Water, Resources, Landscapes, and the Transformation of the American West (Summer Conference, June 4-6)
Presenter: Bob Gough, NativeEnergy, Inc.
72 slides
Time Post-Hatch Caloric Value Of Artemia Salina, Jessie M. Sanders
Time Post-Hatch Caloric Value Of Artemia Salina, Jessie M. Sanders
Senior Honors Projects
In aquatic animal collections, such as those in the collection of Mystic Aquarium & Institute for Exploration’s Fish & Invertebrate department, live food is an essential part of the diet of animals that are on display, used in education, and kept in reserve for exhibits. For Mystic Aquarium’s Fish & Invertebrate department, newly hatched Artemia salina, or brine shrimp, are fed to an assortment of fishes and invertebrates, including soft corals and jellyfish. Hatch brine is an important source of fatty acids, which are essential for proper growth and development. Hatch brine starts encapsulated in a cyst form and are …
Spatial Ecology Of The Giant Burrowing Frog (Heleioporus Australiacus): Implications For Conservation Prescriptions, Trent D. Penman, F Lemckert, M J Mahony
Spatial Ecology Of The Giant Burrowing Frog (Heleioporus Australiacus): Implications For Conservation Prescriptions, Trent D. Penman, F Lemckert, M J Mahony
Faculty of Science - Papers (Archive)
Management of threatened anurans requires an understanding of a species’ behaviour and habitat requirements in both the breeding and non-breeding environments. The giant burrowing frog (Heleioporus australiacus) is a threatened species in south-eastern Australia. Little is known about its habitat requirements, creating difficulties in developing management strategies for the species.Weradio-tracked 33 individual H. australiacus in order to determine their habitat use and behaviour. Data from 33 frogs followed for between 5 and 599 days show that individuals spend little time near (<15 m) their breeding sites (mean 4.7 days for males and 6.3 days for females annually). Most time is spent in distinct non-breeding activity areas 20–250m from the breeding sites. Activity areas of females were further from the breeding site (mean 143 m) than those of males (mean 99 m), but were not significantly different in size (overall mean 500m2; males 553m2; females 307m2). Within activity areas, each frog used 1–14 burrows repeatedly, which weterm home burrows. Existing prescriptions are inappropriate for this species and we propose protection of key populations in the landscape as a more appropriate means of protecting this species.