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Showing 1 to 20 of 43 for “"stomach content"”.
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STOMACH CONTENT ANALYSIS OF BOTULISM-AFFECTED BIRDS IN LAKE MICHIGAN
… were significant intraspecies differences in the stomach content of ring-billed gulls that were compared across collection period (June – July versus August – October) and of BoNT/E-free double-crested cormorants that were compared across location and age group. These results provide further …
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Stomach Content Analysis of the Invasive Small Indian Mongoose (Herpestes auropunctatus) from Puerto Rico
… forest zone and subtropical dry forest zones. Stomach contents were separated and analyzed to determine aggregate percent composition of prey remains for 5 categories (invertebrate, reptile, mammal, vegetation, and other). Of 51 mongoose stomachs analyzed (Dry, n=22, Moist, n=29), there were …
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Determining the Trophic Role of Red Snapper (Lutjanus campechanus) in Mississippi State Waters Using Stomach Content and Stable Isotope Analysis
… (δ<sup>13</sup>C and δ<sup>15</sup>N) and stomach content analysis. Stable isotope analysis of fish and their prey can provide information on species-specific basal resource utilization, diet composition and trophic position which can improve food web models and inform fisheries management …
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Examining the trophic ecology of five myctophid genera in the southern Benguela using morphological, stomach content and stable isotope analyses
… 2019 and were processed for morphological (M), stomach content (SC), and stable isotope (SI) analyses. The morphological analysis determined the relationship between gape and fish size for each genus and compared these between genera. The stomach content analysis evaluated the relative …
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Examining the feeding ecology of two mesopelagic fishes (Lampanyctodes hectoris & Maurolicus walvisensis) off the west coast of South Africa using stable isotope and stomach content analyses
… autumn 2015 cruises, using stable isotope and stomach content analyses. Stable isotope values were extracted from the white muscle tissue of fishes, but due to the high lipid content of both species, samples were processed in duplicate: δ13C was measured from lipid-extracted samples and δ15N …
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A multi-indicator approach to dietary assessments within Lake Michigan's nearshore area
… assessment methods of examining individual’s stomach contents provide valuable data quantifying relationships, however what is incorporated into organisms is not always proportional to what is consumed. Biochemical compounds have recently been explored in marine and terrestrial systems to …
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Food Partitioning Between Two Sympatric Cricetid Species
… State University agricultural station. Fecal and stomach content samples from these species were collected and analyzed for the type and amount of food within each sample. Home ranges for each species were also studied. While the study showed that home ranges of M. ochrogaster and P. maniculatus …
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Food Habits, Starvation and Growth in the Hellbender, Cryptobranchus Alleganiensis
… together, they constituted over 90 percent of stomach content weights in all months. Both fish and crayfish showed seasonal patterns of occurrence in the samples. Ten animals were starved up to 220 days, exhibiting very gradual decreases in weight. Eight animals were maintained at constant …
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Elements and stable isotopes as tracers for sleeper shark biology and the Iceland marine food web
… combining mercury data with stable isotope and stomach content data. Mercury also indicated that 'Lycodes' potentially belonged to a different food web than the other fishes. Results from this research demonstrated the value of elemental tracers in food web studies and generated new questions …
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Diet analysis of wintering waterfowl in the Southeastern United States in relation to ecoregion, habitat, and guild
… Mississippi Flyway. This study investigated the stomach content of wintering waterfowl in the Southeast United States, within the Mississippi Flyway region. The esophagus, proventriculus, and gizzard of each specimen were removed, dried, and sorted for statistical analysis. Multiple two-way …
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Utilizing an Integrated Approach to Explore Niche in a Complex Equatorial System
… that support coexistence, often explored using stomach content analysis and chemical tracers. In this thesis, I explored the applications of acoustic telemetry, a forerunner in technology used to estimate the Grinnellian (spatial) niche of aquatic animals. Positioning algorithms shift the …
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Early Life History of <i>Prognichtys occidentalis</i> and <i>Caranx crysos</i> Associated With <i>Sargassus</i> Habitat in the Northcentral Gulf of Mexico
… the influence of habitat on growth rates. Stomach content analysis determined the influence of habitat on feeding success by means of ANCOVA. Diets were examined for each species and habitats using Morisita's and Shoener's Index. The influence of habitat on fish condition was determined by …
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Behavioral Responses of Rainbow Smelt to Sensory Deterrent Systems
… rainbow smelt from two different locations for stomach content analysis. Results from the sensory deterrent systems indicated that strobe lights successfully repelled rainbow smelt to a minimum of 21 m at both 1-h and 4-h post-activation time intervals. A comparison of vertical strata 10 m above …
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Relationships between phenotype, diet, and individual specialization of threespine stickleback (Gasterosteus aculeatus) in Lake Mývatn, Iceland
… gill raker structure, gut length, and stomach content analyzed, and individual specialization calculated. The results showed that there was no correlation between head morphology or all traits combined with diet or individual specialization values. However, when gill raker structure was …
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Biology of Albacore tuna (Thunnus alalunga, Bonnaterre 1788) off the South West Coast of South Africa
… old (L∞=1100.07 mm; K=0.238 y-1; t₀=-2.14). Stomach content analysis indicated that the mesopelagic squid Lycoteuthis lorigera is the most important prey item for South African albacore. δ13C and δ15N stable isotope analysis of albacore and yellowfin tuna (T. albacares) muscle tissue showed …
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Hide and seek : a multidisciplinary study on the ecological success of an estuarine dweller
… item distributions, and the variation in its stomach content was evaluated as a tool for the assessment of heavy metal pollution impacts and fish biodiversity patterns in European estuaries for the first time. Overall, the results of this study yielded insights into many key factors …
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Trophic Ecology of Largemouth Bass and Northern Pike in Allopatric and Sympatric Assemblages of Voyageurs National Park, Minnesota
… assemblages, and ranged from 88 to 119. Stomach content analysis revealed that the percentage of empty stomachs varied among the study lakes for northern pike (34.7 to 66.7%) and largemouth bass (20.6 to 77.0%). Northern pike relied heavily on fishes, and especially yellow perch Perea …
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Habitat Selection by weaver Birds in the Middle Zambezi Valley
… determined by field observations supplemented by stomach content analyses of 50 collected specimens. A significant difference in the size of the seeds utilized by different species was found. Changing patterns of exploitation of resources were observed and their implications on land-use discussed. …
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Habitat Selection by weaver Birds in the Middle Zambezi Valley
… determined by field observations supplemented by stomach content analyses of 50 collected specimens. A significant difference in the size of the seeds utilized by different species was found. Changing patterns of exploitation of resources were observed and their implications on land-use discussed. …
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Diet Analysis of Stranded Bottlenose Dolphins (<i>Tursiops truncatus</i>) in Virginia
… truncatus</em>) stranded in Virginia via stomach content analysis and considers factors such as proportion of numerical abundance and reconstructed mass, frequency of occurrence, average reconstructed prey size, prey diversity and quantity, and otolith degradation code. Fish size was …
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