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Showing 1 to 20 of 33 for “"niche overlap"”.

  1. Foraging Behavior and Niche Overlap in Seven Species of North American Flycatchers (Tyrannidae)

    Lederer, Roger JosephUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-12T01:27:39Z (GMT). No. of bitstreams: 1 7309978.pdf: 2737853 bytes, checksum: 0d64439975eab15b267bab995b8b3fef (MD5) Previous issue date: 1972

    uiuc Repository record

  2. Interactions between Walleye Sander vitreus and Smallmouth Bass Micropterus dolomieu in Missouri River reservoirs

    Olivencia, KyleIowa State University2022

    … However, expansion of Smallmouth Bass has overlapped with declining Walleye populations, prompting concerns regarding potential competition and predation. Yet, little research has assessed interactions between Smallmouth Bass and Walleye. My study helped to increase the understanding of …

    iastate Repository record

  3. Invasive fish effects on the invertebrate constituents of wetland communities

    Bridges, Levi

    … constituents of these wetlands, and possible niche overlap of fish and dabbling waterfowl using stable isotope analysis. Brook stickleback (Culaea inconstans) and pumpkinseed (Lipomis gibbosus) pose a potentially growing threat to temperate Pacific drainages of North America due to their …

    eastern-wash Repository record

  4. Plasticity and partitioning of foraging behaviour among and within sympatric Pygocelis penguin populations

    de Kock, LeandriDepartment of Statistical Sciences2024

    … breeding penguin species often have overlapping foraging ranges and niches that may lead to competition. Interspecific (between species) and intraspecific (within species) competition are important processes that may shape the foraging behaviours of penguins. However, competition …

    cape-town Repository record

  5. Habitat Selection and Range Overlap of Moose and White-tailed Deer in the Boreal Plains of Saskatchewan

    Nabigon, AyiciaUniversity of Saskatchewan2025

    … east-central Saskatchewan. I hypothesized that overlap between moose and deer would be greatest in areas of high anthropogenic disturbance, especially during summer and fall when forage is abundant. Both species are early-successional browsers predicted to use regenerating burns and forestry …

    sask Repository record

  6. Assessing risk to native ecosystems: using exotic ants as a model

    Probert, AnnaResearchSpace@Auckland2019

    … between native and invasive ants using isotopic niche overlap and co-occurrence patterns, as well as employing DNA metabarcoding, to understand what invertebrate taxa are most at risk via predation. Furthermore, I investigated the potential disruption of floral visitor networks by exotic ants …

    auckland-ms Repository record

  7. Community Structure of Parasitoids Attacking Leaf Galls of Belonocnema treatae on Quercus fusiformis

    Hall, Myra CarmenSouthwest Texas State University2001

    … community members, 2) defining the specific niche dimensions of each parasitoid species in relation to size of gall attacked and timing of attack, 3) elucidating the nature of interactions among parasitoid species, and 4) determining the cumulative effect of parasitoids on B. treatae …

    texas-state Repository record

  8. TROPHIC ECOLOGY OF JUVENILE LEAN AND SISCOWET LAKE TROUT (SALVELINUS NAMAYCHUSH) FROM U.S. WATERS OF LAKE SUPERIOR

    Otte, Will2021

    <p>In this study, I investigated the spatial overlap, diet similarity, and isotopic niches of juvenile Lean and Siscowet Lake Trout ecotypes across six ecoregions of Lake Superior. Spatially, Lean and Siscowet were observed in overlapping depth distributions. Leans were most abundant in shallow …

    nmu Repository record

  9. Food Partitioning Between Two Sympatric Cricetid Species

    Cook, John C.

    … by partitioning resources. The extent of niche overlap and resource partitioning can be determined by studying food habits of sympatric species. Microtus ochrogaster and Peromyscus maniculatus occur sympatrically at the Southwest Missouri State University agricultural station. Fecal and …

    mo-state Repository record

  10. Distribuição, alimentação e período reprodutivo de duas espécies de Tetragonopterinae (Osteichthyes) sintópicas no rio Ubatiba (Maricá, RJ)

    Gomes, José Henrique CantarinoUniversidade Federal do Rio de Janeiro1994

    … the diet of A. janeiroensis. Despite the great niche overlap, competitiva interactions is perhaps being minimized by food abundance and by the lack of a specialization in the diet of A. janeiroensis and Deuterodon sp.

    brazil-uerj Repository record

  11. Modelling the spatial distribution of blackbird (Turdus merula) and ring ouzel (Turdus torquatus) in Switzerland

    von dem Bussche, JensUniversität Potsdam

    … up to the timber line. The altitudinal range overlap of the two species is up to 400 m. Despite both species coexist on macroscale, a direct niche overlap on territory scale is rare. Small-scale differences in vegetation cover and structure seem to play a dominant role for habitat selection. …

    potsdam-thes Repository record

  12. The Consequences of Non-Native Species Invasions on the Contemporary and Historic Trophic Ecology of Native Sport Fish in a Lake Michigan Embayment

    Whitinger, John2020

    … values for 14 fish species. High degrees of niche overlap between walleye, northern pike (<em>Esox lucius</em>), smallmouth bass (<em>Micropterus dolomieu</em>) and yellow perch (<em>Perca flavescens</em>) indicating shared use of common prey items including round goby (<em>Neogobius …

    nmu Repository record

  13. Causes and possible consequences of hybridisation in angelfishes at Christmas Island

    Vitelli, FedericoEdith Cowan University, Research Online, Perth, Western Australia2019

    … Parent species and their hybrids displayed high niche overlap, with all being more abundant at 20 m depth compared to 5 m, and showing similar diets that comprised a mix of green, red, and brown algae. Thus, rarity of parent species and niche overlap would help to promote hybridisation in …

    edithcowan Repository record

  14. Roost-Site Selection of Bats in Northeast Missouri With Emphasis on the Endangered Indiana Bat (Myotis Sodalis)

    Timpone, John C.

    … species of bat, and potential for niche-overlap, I also investigated the roosting behavior of four additional species: the little brown bat (Myotis lucifugus), northern bat (Myotis septentrionalis), evening bat (Nycticeius humeralis), and big brown bat (Eptesicus fuscus). A total of …

    mo-state Repository record

  15. Linking plant traits and herbivory in grassland biodiversity-ecosystem functioning research

    Flynn, Dan F. B.2011

    … communities in these grasslands exhibit high niche overlap, regardless of intensity of herbivory by grasshoppers or sheep. This result indicates that environmental filtering structures these communities more than limiting similarity. Extending the use of traits beyond the study system in Inner …

    columbia-diss Repository record

  16. Habitat Selection by weaver Birds in the Middle Zambezi Valley

    Katanekwa, Vincent katanekwa2012

    … separation in Plocepasser mahali to differential niche overlap in the Ploceus and Quelea species. All the weaver hirds showed evidence of opportunistic feeding, overlaping in their use of seeds and other resources. The patterns of utilization of food resources depended on the abundance of food …

    zimbabwe Repository record

  17. Habitat Selection by weaver Birds in the Middle Zambezi Valley

    Katanekwa, Vincent katanekwa2012

    … separation in Plocepasser mahali to differential niche overlap in the Ploceus and Quelea species. All the weaver hirds showed evidence of opportunistic feeding, overlaping in their use of seeds and other resources. The patterns of utilization of food resources depended on the abundance of food …

    zambia Repository record

  18. The effect of the study region on GIS models of species geographic distributions and estimates of niche evolution; preliminary tests with montane rodents (genus Nephelomys) in Venezuela

    Raza, Ali

    Various niche-based techniques exist to model a species' potential geographic distribution in a Geographic Information Systems (GIS) framework. These models compare the environmental conditions of localities of a species' occurrence versus those of the overall study region. In addition to uses in …

    cuny Repository record

  19. Foraging habitat niche comparisons and foraging behavior of seven species of flycatchers in southwest Virginia

    Via, Jerry WallerVirginia Polytechnic Institute and State University1980

    … interspecific habitat resource partitioning, niche breadth and niche overlap. Four of the species inhabited forested areas; Great Crested Flycatcher, Eastern Wood Pewee, Least Flycatcher and Acadian Flycatcher. Two species, the Eastern Kingbird and Willow Flycatcher, were found in open …

    vt Repository record

  20. Interazioni trofiche tra Condroitti in Mediterraneo

    MULAS, ANTONELLOUniversità degli Studi di Cagliari2011

    … the diet. Intraspecific and interspecific niche overlap, Trophic index and its trend were also determined in order to assess state of exploitation of Chondrichthyans. We analyzed the diet of 27 species M. punctulatus and D. nidarosiensis are new records for Sardinian waters and …

    cagliari Repository record

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