Current Search: Predators (x)
Pages
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Title
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The role of prey detection in the selection of prey by pinfish Lagodon rhomboides (Linnaeus).
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Creator
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Luczkovich, Joseph J., Harbor Branch Oceanographic Institute
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Date Issued
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1988
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PURL
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http://purl.flvc.org/FCLA/DT/3353818
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Subject Headings
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Lagodon rhomboides, Pinfish, Predator & prey, Predation (Biology)
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Format
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Document (PDF)
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Title
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Does allometric growth in juvenile marine turtles have survival benefits? A morphological test with a gape-limited predator.
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Creator
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Scholl, Joshua, Salmon, Michael
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Date Issued
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2013-04-05
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PURL
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http://purl.flvc.org/fcla/dt/3361191
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Subject Headings
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Allometry, Marine turtles, Predators
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Format
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Document (PDF)
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Title
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How leatherback hatchlings recognize their prey: Sensory predispositions and behavioral responses.
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Creator
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Constantino, Maricela Alcantara., Florida Atlantic University, Salmon, Michael
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Abstract/Description
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Leatherback sea turtles (Dermochelys coriacea) feed exclusively on gelatinous prey. Hatchlings are solitary and must possess a predisposition to respond to prey. In laboratory experiments, I studied the responses of nineteen leatherback hatchlings to visual (jellyfish model and shapes: circle, square, diamond) and chemical (homogenates of three prey) stimuli presented alone or as paired (visual + chemical) treatments once daily. When presented alone visual stimuli resembling jellyfish...
Show moreLeatherback sea turtles (Dermochelys coriacea) feed exclusively on gelatinous prey. Hatchlings are solitary and must possess a predisposition to respond to prey. In laboratory experiments, I studied the responses of nineteen leatherback hatchlings to visual (jellyfish model and shapes: circle, square, diamond) and chemical (homogenates of three prey) stimuli presented alone or as paired (visual + chemical) treatments once daily. When presented alone visual stimuli resembling jellyfish outlines elicited stronger feeding responses (changes in locomotion and orientation) than those not resembling jellyfish. Chemical stimuli alone induced a rheotaxis, but responses evoked by some homogenates were stronger than responses to others. Paired stimuli evoked stronger orientation and more consistent increases in swimming (flipper stroke) rate, indicating additive effects. Results suggest that both stimuli elicit food searching behavior and when they begin to forage, hatchlings already possess predispositions to respond to an adaptive array of prey shapes and odors.
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Date Issued
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2002
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PURL
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http://purl.flvc.org/fcla/dt/12873
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Subject Headings
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Leatherback turtle, Predation (Biology)
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Format
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Document (PDF)
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Title
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THE ROLE OF ACETYLCHOLINE IN FELINE PREDATORY ATTACK: QUANTITATIVE AND BEHAVIORAL ANALYSES.
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Creator
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SERVIDIO, SUSAN., Florida Atlantic University
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Abstract/Description
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The role of acetylcholine in feline predatory attack was examined by pharmacological manipulations. Attack behavior was partitioned into components of app roach (visualorientation, approach, extension of the head, trapping, seizing in the jaws, biting) and withdrawal (whole body withdrawal, retraction of the head and upper torso, swiping ) in an attempt to selectively affect specific components of the attack pattern. Carbachol, a cholinomimetic, produced an increase in the percentage of head...
Show moreThe role of acetylcholine in feline predatory attack was examined by pharmacological manipulations. Attack behavior was partitioned into components of app roach (visualorientation, approach, extension of the head, trapping, seizing in the jaws, biting) and withdrawal (whole body withdrawal, retraction of the head and upper torso, swiping ) in an attempt to selectively affect specific components of the attack pattern. Carbachol, a cholinomimetic, produced an increase in the percentage of head and upper torso retractions, as well as a slight inhibition of prey seizing. Atropine methyl nitrate, an anticholinergic, was found to decrease the percentage of head and upper torso retractions, as well as the rate of swiping. The primary effect of atropine, however, was a slight, non-specific inhibition of all behaviors, as evidenced by longer latencies to kill the prey, as well as by long periods of pausing and dry mouth symptoms. Leakage of the drug into the periphery may have contributed to these effects.
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Date Issued
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1981
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PURL
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http://purl.flvc.org/fcla/dt/14047
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Subject Headings
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Predation (Biology), Acetylcholine
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Format
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Document (PDF)
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Title
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The influence of prey identity and size on selection of prey by two marine fishes.
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Creator
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Main, Kevan L., Harbor Branch Oceanographic Institute
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Date Issued
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1985
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PURL
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http://purl.flvc.org/FCLA/DT/3353752
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Subject Headings
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Predators, Marine fishes, Lagodon rhomboides, Syngnathus floridae, Shrimps, Predation (Biology)
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Format
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Document (PDF)
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Title
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Measuring effects of predation on benthic communities in soft sediments.
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Creator
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Virnstein, Robert W., Harbor Branch Oceanographic Institute
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Date Issued
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1980
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PURL
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http://purl.flvc.org/FCLA/DT/3353730
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Subject Headings
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Benthos, Predation (Biology), Sediment, Predation (Biology)--Research--Methodology
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Format
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Document (PDF)
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Title
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METHODS FOR QUANTIFYING MOLLUSK PREDATION BY DUROPHAGOUS PREDATORS.
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Creator
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Jaworski, Natalia K., McCoy, Michael W., Florida Atlantic University, Department of Environmental Sciences, Charles E. Schmidt College of Science
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Abstract/Description
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By regulating the abundance of prey populations, predators can directly and indirectly influence food web interactions in ways that influence ecosystem function. Predator functional responses quantify how predator foraging rate changes with prey abundance. Due to the large numbers of individuals needed for these experiments, most studies are conducted on small, abundant taxa. Consequently, we know relatively little about the functional responses of many marine taxa, especially those that are...
Show moreBy regulating the abundance of prey populations, predators can directly and indirectly influence food web interactions in ways that influence ecosystem function. Predator functional responses quantify how predator foraging rate changes with prey abundance. Due to the large numbers of individuals needed for these experiments, most studies are conducted on small, abundant taxa. Consequently, we know relatively little about the functional responses of many marine taxa, especially those that are large and highly mobile. We present a novel method for studying predator foraging behaviors by integrating two innovative approaches: passive acoustics to document the occurrence of underwater predation events in concert with a recently developed statistical method that uses the times between predation events to estimate functional response parameters. We demonstrate and expand on the application of these methods by quantifying the shape of the predator functional responses for whitespotted eagle rays (Aetobatus narinari) preying on hard clams (Mercenaria mercenaria).
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Date Issued
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2023
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PURL
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http://purl.flvc.org/fau/fd/FA00014252
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Subject Headings
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Predator-prey interactions, Predation (Biology), Mollusks, Ecology
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Format
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Document (PDF)
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Title
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Crayfish (Procambarus spp.) sorting and density effects across a predator gradient.
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Creator
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Kellogg, Christopher M., Dorn, Nathan, Graduate College
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Date Issued
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2011-04-08
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PURL
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http://purl.flvc.org/fcla/dt/3165803
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Subject Headings
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Crayfish culture, Predation (Biology), Sunfishes
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Format
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Document (PDF)
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Title
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Differential predation by barnacles upon larvae of two bryozoans: spatial effects at small scales.
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Creator
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Young, Craig M., Cameron, J. Lane, Harbor Branch Oceanographic Institute
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Date Issued
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1989
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PURL
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http://purl.flvc.org/FCLA/DT/3353836
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Subject Headings
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Predation (Biology), Barnacles, Bryozoa, Larvae
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Format
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Document (PDF)
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Title
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The effects of prey size, predator size, and sediment composition on the rate of predation of the blue crab, Callinectes Sapidus Rathbun, on the hard clam, Mercenaria Mercenaria (Linne).
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Creator
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Arnold, William S., Harbor Branch Oceanographic Institute
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Date Issued
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1984
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PURL
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http://purl.flvc.org/FCLA/DT/3331860
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Subject Headings
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Blue crab, Callinectes, Predation (Biology), Mercenaria mercenaria
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Format
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Document (PDF)
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Title
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Distribution of macrobenthic crustaceans associated with Thalassia, Halodule and bare sand substrata.
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Creator
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Lewis, F. Graham, III, Harbor Branch Oceanographic Institute
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Date Issued
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1984
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PURL
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http://purl.flvc.org/FCLA/DT/3350846
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Subject Headings
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Biomass, Plant biomass, Crustaceans, Seagrasses, Predation (Biology)
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Format
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Document (PDF)
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Title
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Selection of predator-free settlement sites bylarval ascidians.
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Creator
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Young, Craig M., Harbor Branch Oceanographic Institute
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Date Issued
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1989
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PURL
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http://purl.flvc.org/fau/fd/FA00007083
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Subject Headings
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Ascidians, Larvae--Behavior, Habitat selection, Predators
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Format
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Document (PDF)
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Title
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Predator caging experiments in soft sediments: caution advised.
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Creator
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Virnstein, Robert W., Harbor Branch Oceanographic Institute
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Date Issued
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1978
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PURL
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http://purl.flvc.org/FCLA/DT/3343789
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Subject Headings
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Experiments, Marine sediments, Predation, Caging experiments
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Format
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Document (PDF)
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Title
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Diet-based defensive secretions in harvestmen.
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Creator
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Whitaker, Graham., Harriet L. Wilkes Honors College
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Abstract/Description
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Harvestmen are known to secrete a wide range of defensive chemicals in order to protect themselves from predators. An earlier study examined the phylogenetic pattern of defensive secretions produced by 22 species of harvestmen. This research, however, assumed that there is a genetic link between the defensive secretions. I wished to determine whether harvestmen defensive secretions may be diet-based by introducing several irritants into their food and then testing their secretions in the same...
Show moreHarvestmen are known to secrete a wide range of defensive chemicals in order to protect themselves from predators. An earlier study examined the phylogenetic pattern of defensive secretions produced by 22 species of harvestmen. This research, however, assumed that there is a genetic link between the defensive secretions. I wished to determine whether harvestmen defensive secretions may be diet-based by introducing several irritants into their food and then testing their secretions in the same manner. I performed a GC-MS analysis on 13 samples from the Vonones sp. But I found no initial GC-MS readings that showed this species of harvestmen to contain any irritants in their secretions. The absence of irritants does not allow any evaluation of whether harvestmen secretions are genetically or dietarily based.
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Date Issued
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2007
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PURL
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http://purl.flvc.org/FAU/11596
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Subject Headings
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Opiliones, Identification, Arachnida, Physiology, Predation (Biology)
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Format
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Document (PDF)
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Title
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Intraspecific aggression in the brown rover ant, Brachymyrmex obscurior.
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Creator
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Ruddock, Whitney A., Harriet L. Wilkes Honors College
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Abstract/Description
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Invasive ant species often show unicoloniality, forming networks of connected colonies (i.e. supercolonies), which may extend hundreds or even thousands of kilometers. These "supercolonies" lack intraspecific aggression, thus fighting between colonies is absent. Unicoloniality may be an adaptive mechanism that allows for invasive ant species to reach higher population density and achieve ecological dominance. We used aggression assays to study unicoloniality within and between colonies of the...
Show moreInvasive ant species often show unicoloniality, forming networks of connected colonies (i.e. supercolonies), which may extend hundreds or even thousands of kilometers. These "supercolonies" lack intraspecific aggression, thus fighting between colonies is absent. Unicoloniality may be an adaptive mechanism that allows for invasive ant species to reach higher population density and achieve ecological dominance. We used aggression assays to study unicoloniality within and between colonies of the invasive brown rover ant, Brachymyrmex obscurior on the Florida Atlantic University campus in Jupiter, FL. We found that the four B. obscurior colonies could be behaviorally divided into two areas: workers from both colonies in either region never showed intraspecific aggression while workers from colonies in opposing areas always showed intraspecific aggression, often fighting to the death. Thus, B. obscurior appears to show very localized unicoloniality, with neighboring colonies forming small supercolonies.
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Date Issued
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2008
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PURL
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http://purl.flvc.org/FAU/77685
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Subject Headings
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Ants, Behavior, Insect societies, Predation (Biology)
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Format
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Document (PDF)
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Title
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Observation on a sea urchin capturing a juvenile mullet.
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Creator
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Gilmore, R. G., Gore, R. H., Harbor Branch Oceanographic Institute
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Date Issued
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1974
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PURL
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http://purl.flvc.org/FCLA/DT/3174422
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Subject Headings
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Sea urchins, Gray mullets, Predation (Biology), Animal feeding, Clupeidae
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Format
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Document (PDF)
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Title
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Responses of common fouling organisms in the Indian River, Florida, to various predation and disturbance intensities.
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Creator
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Mook, David H., Harbor Branch Oceanographic Institute
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Date Issued
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1983
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PURL
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http://purl.flvc.org/FCLA/DT/3174848
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Subject Headings
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Fouling organisms, Predation (Biology), Predatory animals --Ecology, Reproduction, Sponges
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Format
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Document (PDF)
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Title
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Role of early post-settlement mortality in setting the upper limit of ascidians in Florida epifaunal communities.
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Creator
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Dalby, James E., Jr., Young, Craig M., Harbor Branch Oceanographic Institute
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Date Issued
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1992
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PURL
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http://purl.flvc.org/FCLA/DT/3350866
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Subject Headings
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Sea squirts, Oysters, American oyster, Predation (Biology), Mortality
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Format
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Document (PDF)
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Title
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Aggregations of myctophid fishes with other pelagic fauna.
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Creator
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Auster, P. J., Griswold, C. A., Youngbluth, Marsh J., Bailey, T. G.
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Date Issued
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1992
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PURL
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http://purl.flvc.org/FCLA/DT/3333202
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Subject Headings
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Myctophidae, Submersibles, Predator and prey, Fishes--Behavior
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Format
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Document (PDF)
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Title
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Culture of Mercenaria mercenaria (Linnaeus): effects of density, predator exclusion device, and bag inversion.
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Creator
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Fernandez, Eva M., Lin, Junda, Scarpa, John
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Date Issued
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1999
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PURL
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http://purl.flvc.org/FCLA/DT/3174048
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Subject Headings
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Northern quahog --Development, Northern quahog --Reproduction, Density, Fouling, Predation (Biology)
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Format
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Document (PDF)
Pages