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- Title
- Assessment of genetic population structure, promiscuity, and paternity in free-ranging Atlantic spotted dolphins, Stenella frontalis, in the Bahamas.
- Creator
- Green, Michelle L., Florida Atlantic University, Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
This study investigated a resident community of Atlantic spotted dolphins (Stenella frontalis) on Little Bahama Bank (LBB) in the Bahamas utilizing a noninvasive molecular approach. Genetic template material was collected and extracted from fecal material of S. frontalis. Fine-scale population structure was found within LBB according to mitochondrial DNA (mtDNA) and microsatellites (Fst = 0.25317, P
Show moreThis study investigated a resident community of Atlantic spotted dolphins (Stenella frontalis) on Little Bahama Bank (LBB) in the Bahamas utilizing a noninvasive molecular approach. Genetic template material was collected and extracted from fecal material of S. frontalis. Fine-scale population structure was found within LBB according to mitochondrial DNA (mtDNA) and microsatellites (Fst = 0.25317, P < 0.0001 and Fst = 0.04491, P < 0.0001, respectively). Three main social clusters (North, Central, South/Roam) exist on LBB and all clusters were found to be genetically distinct according to microsatellite analyses. Mitochondrial haplotypes revealed North and South/Roam were not differentiated, but Central was different from both. When separated by sex, males were less genetically structured than females. Males showed no evidence of structure according to Ost or Rst., Females of all clusters were differentiated according to microsatellites whereas mtDNA revealed the same pattern in females as was seen for the total population. The structuring patterns of the sexes clearly indicate a pattern of male dispersal and female philopatry for the LBB population. Genetic investigation of mating revealed patterns in the mating system of S. frontalis on LBB. Genotypes of females and offspring were analyzed and revealed that more than two males were required to explain the progeny arrays, indicating promiscuous mating among females. In addition, paternity assessment assigned seven males as fathers to ten of 29 mother-calf pairs. A pattern of reproductive skew according to age was revealed because reproductively successful males were in the oldest age class at the estimated time of conception of the calves., Patterns in social cluster mating revealed that males from the Central cluster sired offspring with females from both the Central and North clusters, while Roaming males sired offspring with South and Central females indicating that males mate within their social cluster or with females from the next closest cluster. The study has important implications for cetacean research, specifically delphinids. Fine-scale population structure and mating patterns of male and female S. frontalis were revealed through noninvasive methodology presenting a valuable genetic framework with which to support ongoing investigations of life history, behavior, communication and social structure.
Show less - Date Issued
- 2008
- PURL
- http://purl.flvc.org/FAU/58004
- Subject Headings
- Dolphins, Social behavior in animals, Population genetics, Atlantic spotted dolphin, Dolphins, Geographical distribution
- Format
- Document (PDF)
- Title
- Does size really matter: how synchrony and size affect the dynamic of aggression between two sympatric species of dolphin in the Bahamas.
- Creator
- Cuksick, Jessica A., Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
Bottlenose (Tursiops truncatus) and spotted (Stenella frontalis) dolphins are sympatric species, resident to Little Bahama Bank, Bahamas. A unique, dynamic methodology quantified how interspecific aggression changed over time in terms of the individuals participating, context, and behaviors used. The timing of human observation relative to the onset of aggression did not result in differences in the proportion of behaviors observed. Highly intense behaviors were used most often. The...
Show moreBottlenose (Tursiops truncatus) and spotted (Stenella frontalis) dolphins are sympatric species, resident to Little Bahama Bank, Bahamas. A unique, dynamic methodology quantified how interspecific aggression changed over time in terms of the individuals participating, context, and behaviors used. The timing of human observation relative to the onset of aggression did not result in differences in the proportion of behaviors observed. Highly intense behaviors were used most often. The synchronous state of spotted dolphin groups, not the presence alone, was a crucial factor in determining the onset and progression of aggression. When synchronous, spotted dolphins successfully dominated the larger bottlenose dolphins. Two levels of dominance were observed. Within a single encounter ("encounter level"), one species did dominate the other. When all aggressive encounters were considered collectively over the long term ("gross level"), one species did not dominate the other. The combination of contextual factors best determined the dynamic of interspecific aggression.
Show less - Date Issued
- 2012
- PURL
- http://purl.flvc.org/FAU/3342044
- Subject Headings
- Bottlenose dolphin, Behavior, Research, Atlantic spotted dolphin, Behavior, Research, Mammals, Behavior, Aggressive behavior in animals
- Format
- Document (PDF)
- Title
- Home on the range: spatial ecology of Atlantic spotted dolphins (Stenella frontalis) in the Bahamas.
- Creator
- Augliere, Bethany., Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
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I examined summer home range use of Altantic spotted dolphins in the Bahamas from 1991-2004. Home ranges for 86 dolphins using the 95% Fixed Kernel Density (FKD) estimator averages 62.o km2+=22.96 km2 and ranged from 24.8 km2 to 148.4 km2. Older animals and males had the largest ranges. Home range size did not vary with female reproductive status. core areas were defined by the 50% FKD contour and averaged 10.32 km2 +=5.47 km2. Habitat use was different between reproductive states for females...
Show moreI examined summer home range use of Altantic spotted dolphins in the Bahamas from 1991-2004. Home ranges for 86 dolphins using the 95% Fixed Kernel Density (FKD) estimator averages 62.o km2+=22.96 km2 and ranged from 24.8 km2 to 148.4 km2. Older animals and males had the largest ranges. Home range size did not vary with female reproductive status. core areas were defined by the 50% FKD contour and averaged 10.32 km2 +=5.47 km2. Habitat use was different between reproductive states for females. Non-reproductively active (NRA) females used deeped habitat. Behavioral use of the home range varied spatially. The core area was an important foraging area for males and reproductively active females. NRA females foraged more outside their core area compared to the core area.
Show less - Date Issued
- 2012
- PURL
- http://purl.flvc.org/FAU/3358277
- Subject Headings
- Social behavior of animals, Dolphins, Geographical distribution, Dolphins, Habitat
- Format
- Document (PDF)
- Title
- Maternal and alloparental discipline in Atlantic spotted dolphins (Stenella frontalis) in the Bahamas.
- Creator
- Weinpress, Meghan., Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
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Discipline was implemented by mothers and alloparent spotted dolphins (Stenella frontalis) mothers and alloparents on Little Bahama Bank, Bahamas. Disciplinarians were significantly more likely to be adults than juveniles. Although most disciplinarians were female, males were also observed to perform discipline. The recipients of discipline were male and female, and significantly more likely to be calves than juveniles. Pursuit, contact, and display behaviors were used in discipline, however...
Show moreDiscipline was implemented by mothers and alloparent spotted dolphins (Stenella frontalis) mothers and alloparents on Little Bahama Bank, Bahamas. Disciplinarians were significantly more likely to be adults than juveniles. Although most disciplinarians were female, males were also observed to perform discipline. The recipients of discipline were male and female, and significantly more likely to be calves than juveniles. Pursuit, contact, and display behaviors were used in discipline, however pursuit behaviors were most often observed. Variables such as age class, sex, and parity were not found to influence how discipline was implemented. The durations of all disciplinary pursuits were under thirty seconds, and successful pursuits had slightly shorter duration than unsuccessful pursuits. Disciplinarian success was not significantly influenced by age class, sex, parity, or behavior used.
Show less - Date Issued
- 2013
- PURL
- http://purl.flvc.org/fcla/dt/3361254
- Subject Headings
- Animal behavior, Behavior evolution, Atlantic mammals, Behavior, Parent-child relationships, Social behavior in animals, Discipline of children, Atlantic spotted dolphin
- Format
- Document (PDF)
- Title
- Nutrition and habitat driven foraging of wild dolphins in the Bahamas: a recipe for prey.
- Creator
- Malinowski, Christopher R., Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
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Two sympatric dolphin species, Stenella frontalis and Tursiops truncatus, resident to Little Bahama Bank, Bahamas were found to mostly forage independent of one another, but occasionally foraged in mixed groups. Analysis of over 20 years of data revealed the degree of overlap to be minimal with spatially distinct regions identified for both species, environmental segregation based on depth, bottom type, temperature, and time of day. Results based on observational data indicated significant...
Show moreTwo sympatric dolphin species, Stenella frontalis and Tursiops truncatus, resident to Little Bahama Bank, Bahamas were found to mostly forage independent of one another, but occasionally foraged in mixed groups. Analysis of over 20 years of data revealed the degree of overlap to be minimal with spatially distinct regions identified for both species, environmental segregation based on depth, bottom type, temperature, and time of day. Results based on observational data indicated significant differences in group size and selected prey. For S. frontalis, lactating females had the most distinct diet, which differed from that of non-reproductively active (NRA) females. Pregnant females had ambiguous prey use results, but diet differences were revealed through nutritional analysis. Lactating females had a higher intake of all nutrients (% moisture, % lipid, % protein, and calories) than pregnant females but lower than NRA females. Mother and calf pairs selected prey for caloric and moisture values. The influence of calves on foraging groups was reflected through discrete differences in all nutrients. Males and females appeared to select the same major prey, but female prey use was much more diverse.
Show less - Date Issued
- 2011
- PURL
- http://purl.flvc.org/FAU/3318668
- Subject Headings
- Dolphins, Habitat, Predatory marine animals, Ecology, Marine ecosystem management, Predation (Biology), Aquatic mammals, Behavior
- Format
- Document (PDF)
- Title
- Preacher's Cave: developing a national heritage tourism site in Eluthera, Bahamas.
- Creator
- Day, Jane S., Dorothy F. Schmidt College of Arts and Letters, Department of Anthropology
- Abstract/Description
-
Preacher's Cave, an archaeological site in North Eleuthera, Bahamas, is arguably one of the most important historical places in that country. This large cave, isolated in a natural setting, has long been associated in the popular imagination with the first English colonists who shipwrecked in the Bahamas in 1648 and laid the foundation for the modern nation. Before the present work, no systematic scientific archaeological work had ever been conducted at this site. While Project Director for...
Show morePreacher's Cave, an archaeological site in North Eleuthera, Bahamas, is arguably one of the most important historical places in that country. This large cave, isolated in a natural setting, has long been associated in the popular imagination with the first English colonists who shipwrecked in the Bahamas in 1648 and laid the foundation for the modern nation. Before the present work, no systematic scientific archaeological work had ever been conducted at this site. While Project Director for the Preacher's Cave archaeological investigations in 1991, 1992, 2005, 2006, and 2007, I acted as liaison between the Bahamian Government, local island constituents, and the team of scholars who accomplished the work, organizing all aspects of the excavations. By analyzing the recovered material assemblage from these excavations, we were able to prove that the seventeenth-century English Puritans not only used Preacher's Cave for shelter in the first period of colonization, but altered the natural rock formations of the cave for use as the first church in the Bahamas. These excavations, in conjunction with the written record, also suggest that the area surrounding the site is the location of the first free black community in the country. Finally the scientific investigation confirmed Preacher's Cave as a prehistoric burial spot for the Lucayan people who lived in the islands before Columbus landed in 1492. These burials are unique because they were recovered with grave goods and one of the five Lucayan burials appears to be a victim of human sacrifice. No where else in the country do these three compelling narratives come together and form the basis for the development of a National Heritage Tourism Site., But protecting an historic site and interpreting it for visitors in a country where tourism is one of the major industries can be challenging. This study summarizes past strategies that were successful in the development of a small museum on the nearby is Wells using the techniques of the public historian and public archaeologist to proceed with plans for the opening of Preacher's Cave as a national park. Discussions concerning constituents, park boundaries, access, and political realities in the twenty-first century Bahamas are considered while examining the larger concept of heritage and tourism as collaborative industries.
Show less - Date Issued
- 2010
- PURL
- http://purl.flvc.org/FAU/1927305
- Subject Headings
- Excavations (Archaeology), Historic sites, Antiquities, Antiquities
- Format
- Document (PDF)