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- Title
- Species densities of macrobenthos associated with seagrass: a field experimental study of predation.
- Creator
- Young, David K., Buzas, M. A., Young, Martha W., Harbor Branch Oceanographic Institute
- Date Issued
- 1976
- PURL
- http://purl.flvc.org/FCLA/DT/3352181
- Subject Headings
- Seagrasses--Florida--Indian River (Lagoon), Predation (Biology), Seagrasses--Ecology, Food webs, Species
- Format
- Document (PDF)
- Title
- Differential predation by barnacles upon larvae of two bryozoans: spatial effects at small scales.
- Creator
- Young, Craig M., Cameron, J. Lane, Harbor Branch Oceanographic Institute
- Date Issued
- 1989
- PURL
- http://purl.flvc.org/FCLA/DT/3353836
- Subject Headings
- Predation (Biology), Barnacles, Bryozoa, Larvae
- Format
- Document (PDF)
- Title
- Larval predation by barnacles: effects on patch colonization in a shallow subtidal community.
- Creator
- Young, Craig M., Gotelli, Nicholas J., Harbor Branch Oceanographic Institute
- Date Issued
- 1988
- PURL
- http://purl.flvc.org/FCLA/DT/3172815
- Subject Headings
- Barnacles, Predation (Biology), Marine invertebrates --Larvae, Balanus, Marine ecology
- Format
- Document (PDF)
- Title
- Origins, movements, and foraging behavior of Hawksbill Sea Turtles (Eretmochelys imbricata) in Palm Beach County waters, Florida, USA.
- Creator
- Wood, Lawrence D., Milton, Sarah L., Florida Atlantic University, Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
This dissertation examined the natal origins, home-range, and in-situ foraging behavior of an aggregation of sub-adult hawksbill turtles (Eretmochelys imbricata) found off the coast of Palm Beach County, Florida. Surveys were conducted on approximately 30 linear km of reef between 15 and 30 m in depth. Tissue samples were retrieved from 112 turtles for mtDNA haplotype determination. GPS-linked satellite transmitters were deployed on six resident sub-adults, resulting in both minimum convex...
Show moreThis dissertation examined the natal origins, home-range, and in-situ foraging behavior of an aggregation of sub-adult hawksbill turtles (Eretmochelys imbricata) found off the coast of Palm Beach County, Florida. Surveys were conducted on approximately 30 linear km of reef between 15 and 30 m in depth. Tissue samples were retrieved from 112 turtles for mtDNA haplotype determination. GPS-linked satellite transmitters were deployed on six resident sub-adults, resulting in both minimum convex polygon (MCP) and 95%, 50%, and 25% kernel density estimates (KDE) of home-range size. A foraging ethogram was developed, and sequential analysis performed on thirty videos (141 total minutes) of in-situ foraging behavior. Seventeen total haplotypes were identified in this aggregation, the majority (75%) of which represented rookeries on Mexico’s Yucatan Peninsula. Other sources, from most to least important, include Barbados, Costa Rica, Puerto Rico, Antigua, and the U.S. Virgin Islands.
Show less - Date Issued
- 2014
- PURL
- http://purl.flvc.org/fau/fd/FA00004339
- Subject Headings
- Animal behavior, Animal orientation, Hawksbill turtle -- Ecology, Predation (Biology), Sea turtles -- Habitat, Wildlife conservation, Wildlife management
- Format
- Document (PDF)
- Title
- Quantifying the energetic cost of disorientation in loggerhead (Caretta caretta) and green (Chelonia mydas) sea turtle hatchlings.
- Creator
- Williams, Sean., Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
The photopollution of beaches caused by artificial light sources can interfere with sea turtle hatchlings' ability to orient properly towards the sea. Exhaustion due to extended disorientation crawling may then increase hatchling mortality. This study evaluated the energetic consequences of long-distance crawls in green and loggerhead sea turtle hatchlings. Turtles crawled for 200 m or 500 m on a treadmill, followed by a 30 minute evaluation of swim performance. Metabolic activity was...
Show moreThe photopollution of beaches caused by artificial light sources can interfere with sea turtle hatchlings' ability to orient properly towards the sea. Exhaustion due to extended disorientation crawling may then increase hatchling mortality. This study evaluated the energetic consequences of long-distance crawls in green and loggerhead sea turtle hatchlings. Turtles crawled for 200 m or 500 m on a treadmill, followed by a 30 minute evaluation of swim performance. Metabolic activity was quantified via measures of blood glucose, blood lactate, and oxygen consumption. No significant changes in metabolism resulted from long-distance crawling activity in loggerheads ; however, loggerheads rested for extended periods of time during the crawl trials, often unresponsive to stimuli. This behavior implies that loggerhead hatchlings would be vulnerable to predation or temperature stress due to exhaustion from extended periods of crawling. Further data is required to draw any significant conclusions about long-term disorientatin crawling in green hatchlings.
Show less - Date Issued
- 2012
- PURL
- http://purl.flvc.org/FAU/3356891
- Subject Headings
- Sea turtles, Nests, Protection, Sea turtles, Life cycles, Animal behavior, Predation (Biology)
- Format
- Document (PDF)
- Title
- Diet-based defensive secretions in harvestmen.
- Creator
- Whitaker, Graham., Harriet L. Wilkes Honors College
- Abstract/Description
-
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.
Show less - Date Issued
- 2007
- PURL
- http://purl.flvc.org/FAU/11596
- Subject Headings
- Opiliones, Identification, Arachnida, Physiology, Predation (Biology)
- Format
- Document (PDF)
- Title
- Estimating predation levels and site-specific survival of hatchling loggerhead sea turtles (Caretta caretta) from south Florida beaches.
- Creator
- Whelan, Christie L., Florida Atlantic University, Wyneken, Jeanette
- Abstract/Description
-
Few studies document mortality rates for hatchling sea turtles during their migration away from the nesting beach. This study quantifies and compares nearshore predation rates on loggerhead hatchlings (Caretta caretta) at several locations in southern Florida. Hatchlings were followed by observers in kayaks during the first 15 min of the migration away from the beach. The overall observed predation rate (4.6%) is similar to a previous estimate (5%) from a natural high density Florida nesting...
Show moreFew studies document mortality rates for hatchling sea turtles during their migration away from the nesting beach. This study quantifies and compares nearshore predation rates on loggerhead hatchlings (Caretta caretta) at several locations in southern Florida. Hatchlings were followed by observers in kayaks during the first 15 min of the migration away from the beach. The overall observed predation rate (4.6%) is similar to a previous estimate (5%) from a natural high density Florida nesting beach, and lower than at a hatchery site. Predation rates were higher on Florida's southeast coast than the southwest coast. Predation increased towards the end of the hatching season. Results suggest that currently, hatchling mortality rates are relative low in Florida's shallow nearshore waters. Given the lack of growth by loggerhead populations, the cumulative mortality must be high after hatchlings depart shallow coastal waters.
Show less - Date Issued
- 2005
- PURL
- http://purl.flvc.org/fcla/dt/13259
- Subject Headings
- Sea turtles--Florida--Atlantic Coast, Loggerhead turtle--Mortality, Predation (Biology)
- Format
- Document (PDF)
- Title
- A retrospective analysis of sea turtle nest depredation patterns at Canaveral National Seashore, Florida.
- Creator
- Welicky, Rachel., Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
Nest predation can significantly reduce hatchling recruitment in sea turtle populations. This study uses 20 years of data from Canaveral National Seashore, Florida, which has pristine and altered beaches. Chi-square tests were used to determine if secondary predation events were related to the nest's primary depredation event. To determine if human beach use and nest predation are spatially or temporally linked, we ranked human beach use and examined predation frequency across all screened...
Show moreNest predation can significantly reduce hatchling recruitment in sea turtle populations. This study uses 20 years of data from Canaveral National Seashore, Florida, which has pristine and altered beaches. Chi-square tests were used to determine if secondary predation events were related to the nest's primary depredation event. To determine if human beach use and nest predation are spatially or temporally linked, we ranked human beach use and examined predation frequency across all screened and marked nests (n=40,441). Lastly, I quantified nest predation risk spatially and temporally. I found that primary predation increases the chance of a nest suffering subsequent predation. Primary and multiple predation events occurred with greater frequency in limited use areas and with lowest frequency in moderate use areas. Predation risk decreased by an average of 29.5% from 2000-2008. Nests deposited midseason were 9.8% more likely to be predated than nests deposited early or late.
Show less - Date Issued
- 2010
- PURL
- http://purl.flvc.org/FAU/2683130
- Subject Headings
- Predation (Biology), Wildlife managment, Sea turtles, Sea turtles, Nests
- Format
- Document (PDF)
- Title
- Aggressive Behaviors Of Adult Male Atlantic Spotted Dolphins (Stenella frontalis) During Intraspecific And Interspecific Aggressive Interactions.
- Creator
- Volker, Cassandra L., Herzing, Denise L., Hughes, Colin, Florida Atlantic University, Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
Atlantic spotted dolphins (Stenella frontalis) and bottlenose dolphins (Tursiops truncatus) are two sympatric species resident to the Bahamas. The visibility of the Bahamian water provided a unique opportunity to study spotted dolphin communication during aggression. This study’s main focus was to decipher any similarities or differences in the behaviors used by spotted dolphins during interspecific and intraspecific aggression. Both similarities and differences were discovered. Biting,...
Show moreAtlantic spotted dolphins (Stenella frontalis) and bottlenose dolphins (Tursiops truncatus) are two sympatric species resident to the Bahamas. The visibility of the Bahamian water provided a unique opportunity to study spotted dolphin communication during aggression. This study’s main focus was to decipher any similarities or differences in the behaviors used by spotted dolphins during interspecific and intraspecific aggression. Both similarities and differences were discovered. Biting, following, and chasing behavioral events were used more during interspecific aggression, while the display behavioral class was used more than the contact behavioral class during intrabut not interspecific aggression. This study showed that spotted dolphins use more energy intensive and risky behaviors when fighting interspecifically. This could result from having to fight and defend females from a larger species, trying to avoid sexual harassment from bottlenose males, or needing to use behaviors that are more overt and easily understood during interspecies communication.
Show less - Date Issued
- 2016
- PURL
- http://purl.flvc.org/fau/fd/FA00004638, http://purl.flvc.org/fau/fd/FA00004638
- Subject Headings
- Atlantic spotted dolphin--Bahamas., Aggressive behavior in animals., Social behavior in animals., Aquatic mammals--Behavior., Predation (Biology), Predatory marine animals--Ecology.
- Format
- Document (PDF)
- Title
- Measuring effects of predation on benthic communities in soft sediments.
- Creator
- Virnstein, Robert W., Harbor Branch Oceanographic Institute
- Date Issued
- 1980
- PURL
- http://purl.flvc.org/FCLA/DT/3353730
- Subject Headings
- Benthos, Predation (Biology), Sediment, Predation (Biology)--Research--Methodology
- Format
- Document (PDF)
- Title
- Predation on estuarine infauna: Response patterns of component species.
- Creator
- Virnstein, Robert W., Harbor Branch Oceanographic Institute
- Date Issued
- 1979
- PURL
- http://purl.flvc.org/FCLA/DT/3174215
- Subject Headings
- Predation (Biology), Blue crab, Fishes, Species, Estuarine animals
- Format
- Document (PDF)
- Title
- The importance of predation by crabs and fishes on benthic infauna in Chesapeake Bay.
- Creator
- Virnstein, Robert W., Harbor Branch Oceanographic Institute
- Date Issued
- 1977
- PURL
- http://purl.flvc.org/FCLA/DT/3174984
- Subject Headings
- Predation (Biology), Predatory animals--Ecology, Benthic animals, Chesapeake Bay (Md. and Va.), Estuaries
- Format
- Document (PDF)
- Title
- The influence of public access on raccoon predation on sea turtle nests in Boca Raton, Florida.
- Creator
- VanDam, Andrea., Harriet L. Wilkes Honors College
- Abstract/Description
-
In the Eastern United States, the Florida coastline provides 85% of all nesting sites for the green (Chelonia mydas), leatherback (Dermochelys coriacea), and loggerhead (Caretta caretta) sea turtles. Palm Beach County beaches experience some of the highest nesting frequencies, but recreational use of the beaches has increased threats like raccoon predation. The Gumbo Limbo Nature Center (GLNC) in Boca Raton (founded in 1984) keeps records of nests and predators to the nests. I analyzed 4554...
Show moreIn the Eastern United States, the Florida coastline provides 85% of all nesting sites for the green (Chelonia mydas), leatherback (Dermochelys coriacea), and loggerhead (Caretta caretta) sea turtles. Palm Beach County beaches experience some of the highest nesting frequencies, but recreational use of the beaches has increased threats like raccoon predation. The Gumbo Limbo Nature Center (GLNC) in Boca Raton (founded in 1984) keeps records of nests and predators to the nests. I analyzed 4554 GLNC nest records from 2002-2007 to examine whether raccoon predation of turtle nests was most prevalent in areas of high human impact. I found that raccoon predation occurred at significantly higher rates in areas with public access to the beach than in areas without such access (high access: 50.8%, low access: 14.4%, overall: 36.4%). This suggests the necessity of increased protection of nests in areas of high access for the preservation of nesting populations.
Show less - Date Issued
- 2008
- PURL
- http://purl.flvc.org/FAU/77697
- Subject Headings
- Predation (Biology), Sea turtles, Mortality, Wildlife conservation
- Format
- Document (PDF)
- Title
- Perception and choice of substratum by epifaunal amphipods associated with seagrasses.
- Creator
- Stoner, Allan W., Harbor Branch Oceanographic Institute
- Date Issued
- 1980
- PURL
- http://purl.flvc.org/FCLA/DT/3350838
- Subject Headings
- Amphipoda, Seagrasses, Biomass, Lagodon rhomboids, Predation (Biology), Indian River (Fla.: Lagoon)
- Format
- Document (PDF)
- Title
- A test of factors affecting the foraging success of scarlet ibis.
- Creator
- Stanek, Rebecca A., Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
Wading bird foraging success is influenced by many different factors. From January to March 2008, I conducted a small-scale experiment with three captive Scarlet Ibis (Eudocimus ruber) at the Palm Beach Zoo, in West Palm Beach, Florida. Prey density and the presence of conspecifics were manipulated to test for a response by ibis in terms of prey capture rate. Mixed model analysis, when one prey type was available, showed that capture rate increased significantly with prey density and...
Show moreWading bird foraging success is influenced by many different factors. From January to March 2008, I conducted a small-scale experiment with three captive Scarlet Ibis (Eudocimus ruber) at the Palm Beach Zoo, in West Palm Beach, Florida. Prey density and the presence of conspecifics were manipulated to test for a response by ibis in terms of prey capture rate. Mixed model analysis, when one prey type was available, showed that capture rate increased significantly with prey density and decreased with the presence of conspecifics. When two prey types were available, prey density and the presence of conspecifics had no effect on the capture rates of either prey type. Selectivity analysis revealed that ibis always selected for crayfish in mixed treatments. I hypothesize that the number of prey types available in a treatment played an important role in determining how fish density and the presence of conspecifics affected ibis foraging success.
Show less - Date Issued
- 2009
- PURL
- http://purl.flvc.org/FAU/215288
- Subject Headings
- Scarlet ibis, Food, Birds, Ecology, Birds, Behavior, Wildlife management, Predation (Biology)
- Format
- Document (PDF)
- Title
- Intraspecific aggression in the difficult ant, Technomyrmex difficilis (Hymenoptera: Formicidae).
- Creator
- Sollins, Benjamin H., Harriet L. Wilkes Honors College
- Abstract/Description
-
One mechanism allowing ant species to successfully invade new areas at a rapid pace is unicoloniality, the formation of large networks connecting colonies over hundreds or even thousands of kilometers. These large networks of colonies, or "supercolonies" lack any form of intraspecific aggression, thus fighting between them is absent. I used aggression assays to study unicoloniality between colonies of the invasive difficult ant, Technomyrmex difficilis on the Florida Atlantic University...
Show moreOne mechanism allowing ant species to successfully invade new areas at a rapid pace is unicoloniality, the formation of large networks connecting colonies over hundreds or even thousands of kilometers. These large networks of colonies, or "supercolonies" lack any form of intraspecific aggression, thus fighting between them is absent. I used aggression assays to study unicoloniality between colonies of the invasive difficult ant, Technomyrmex difficilis on the Florida Atlantic University Wilkes Honors College campus and a household located ~32 km northwest from the college. I found that for all trial combinations, no aggression took place among the ants. From these results, I conclude that T. difficilis does display unicoloniality in South Florida.
Show less - Date Issued
- 2010
- PURL
- http://purl.flvc.org/FAU/3335456
- Subject Headings
- Technomyrmex difficilis, Ants, Behavior, Insect colonies, Predation (Biology)
- Format
- Document (PDF)
- Title
- THE ROLE OF ACETYLCHOLINE IN FELINE PREDATORY ATTACK: QUANTITATIVE AND BEHAVIORAL ANALYSES.
- Creator
- SERVIDIO, SUSAN., Florida Atlantic University
- Abstract/Description
-
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.
Show less - Date Issued
- 1981
- PURL
- http://purl.flvc.org/fcla/dt/14047
- Subject Headings
- Predation (Biology), Acetylcholine
- Format
- Document (PDF)
- Title
- Effects of freshwater discharges and habitat architecture on oyster reef community development and diversity.
- Creator
- Salewski, Elizabeth a., Charles E. Schmidt College of Science, Center for Environmental Studies
- Abstract/Description
-
Oyster reefs support diverse estuarine communities and food webs. Factors controlling oyster reef community development were studied on restored reefs in the St. Lucie Estuary. Freshwater discharges create stresses that cause oyster mortality, habitat loss and reduction in reef community diversity. Using structural equation modeling, it was demonstrated that salinity, turbidity, and chlorophyll-a gradients influence oysters and some reef invertebrate species, but did not support the...
Show moreOyster reefs support diverse estuarine communities and food webs. Factors controlling oyster reef community development were studied on restored reefs in the St. Lucie Estuary. Freshwater discharges create stresses that cause oyster mortality, habitat loss and reduction in reef community diversity. Using structural equation modeling, it was demonstrated that salinity, turbidity, and chlorophyll-a gradients influence oysters and some reef invertebrate species, but did not support the predictions of the Intermediate Disturbance Hypothesis. In contrast, diversity and species richness were greatest at low stress sites. A field experiment showed that topographic relief and architectural complexity enhanced colonization and growth of reef-building species (e.g.oysters and mussels). The relief by complexity interaction had a higher order, synergistic effect on oyster abundance. When considered separately, increasing relief further enhanced dominant sessile taxa (cirripeds and ascideans) ; while, increasing complexity supported greater species richness and the abundance of cirripeds.
Show less - Date Issued
- 2012
- PURL
- http://purl.flvc.org/FAU/3355881
- Subject Headings
- American oyster, Reef ecology, Habitat conservation, Predation (Biology)
- Format
- Document (PDF)
- Title
- Functional aspects of behavior and morphology in the decorator crab Microphrys Bicornutus (Latreille, 1825) (Crustacea: Brachyura: Mithracidae).
- Creator
- Salazar, Monique Alexandra, Brooks, W. Randy, Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
Masking or decorator crabs, conceal themselves partially through camouflage, by selecting or indiscriminately attaching materials from their environment to their exoskeleton. Functional aspects of decorating behavior and morphology in this group have not been documented. Using Microphrys bicornutus as a model species, this dissertation demonstrates clearly that decorating is an advantageous phenotype that has evolved to serve several functions. Decorating is a complex behavior that begins...
Show moreMasking or decorator crabs, conceal themselves partially through camouflage, by selecting or indiscriminately attaching materials from their environment to their exoskeleton. Functional aspects of decorating behavior and morphology in this group have not been documented. Using Microphrys bicornutus as a model species, this dissertation demonstrates clearly that decorating is an advantageous phenotype that has evolved to serve several functions. Decorating is a complex behavior that begins when a crab approaches an algal substrate and results in the attachment of algae to hooked setae on the exoskeleton. Once decorated, crabs remain motionless on the substrate until disturbed or until another behavior is initiated. This was confirmed for M. bicornutus, as crabs spent a significant amount of time feeding, remaining motionless, picking, and walking when compared to decorating. Crabs displayed agonistic behaviors during encounters with conspecifics conspecifics. These included both active aggressive behavior and display behavior. Crabs showed a decrease in motility during these encounters, helping maintain dispersed distributions, thereby decreasing intrsapecific encounters in the field. Trials were done to determine the effect of conspecifics, predators and feeding preferences on algal utilization. M. bicornutus showed a significant decrease in the amount of algae used for decoration in the highest density trials (i.e., 4 and 8 crabs). Agonistic displays and aggressive behavior between these crabs likely affected the time available for decorating. Decorated crabs isolated from an algal substrate were more likely to survive in the presence of either of two sympatric fish predators. Thus, being protected by the algal decoration on their exoskeletons. Trials also showed a parallel between algal consumption and algal materials used for decoration. In addition to its protective function, algae used by M. bicornutus for decoration simultaneously serve as short term food supplies for the crabs. Eleven morphologically complex structures were identified and mapped on the exoskeleton. Hooked setae were the primary structures used to attach algae to the crab’s body. Ten additional setal structures were present, including two novel types of setae. On the basis of location and morphological variation exhibited among these latter structures, a primary sensory function may be inferred.
Show less - Date Issued
- 2013
- PURL
- http://purl.flvc.org/fau/fd/FA0004056
- Subject Headings
- Animal behavior, Camouflage (Biology), Crabs -- Behavior, Marine ecology, Predation (Biology)
- Format
- Document (PDF)
- Title
- Intraspecific aggression in the brown rover ant, Brachymyrmex obscurior.
- Creator
- Ruddock, Whitney A., Harriet L. Wilkes Honors College
- Abstract/Description
-
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.
Show less - Date Issued
- 2008
- PURL
- http://purl.flvc.org/FAU/77685
- Subject Headings
- Ants, Behavior, Insect societies, Predation (Biology)
- Format
- Document (PDF)