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(1 - 10 of 10)
- Title
- Synchrony andsociality: breeding strategies in constant and variable environments.
- Creator
- Young, Craig M., Harbor Branch Oceanographic Institute
- Date Issued
- 1999
- PURL
- http://purl.flvc.org/fau/fd/FA00007271
- Subject Headings
- Breeding, Reproduction, Benthos, Aquatic ecology
- Format
- Document (PDF)
- Title
- CRYOGENIC PRESERVATION OF BUDGERIGAR, MELOPSITTACUS UNDULATUS, SEMEN (SPERMATOZOA).
- Creator
- HARGROVE, TIMOTHY LUTHER, Florida Atlantic University
- Abstract/Description
-
Successful cryogenic preservation of semen from a psittacine species, Melopsittacus wzdulatus, was first achieved in this study. A total of 64 combinations of the following variables were tested, using percent motility as the criterion of successful freezing: two diluents (Beltsville Poultry Semen Extender (BPSE) and acetate); two dilution ratios; four different holding times (time that semen plus diluent equilibrate); and four different equilibration times (time that semen and diluent...
Show moreSuccessful cryogenic preservation of semen from a psittacine species, Melopsittacus wzdulatus, was first achieved in this study. A total of 64 combinations of the following variables were tested, using percent motility as the criterion of successful freezing: two diluents (Beltsville Poultry Semen Extender (BPSE) and acetate); two dilution ratios; four different holding times (time that semen plus diluent equilibrate); and four different equilibration times (time that semen and diluent equilibrate with cryoprotectant), with a significant interaction occuring between these variables. Two different levels of dimethylsulfoxide (DMSO) were also tried. Five combinations of these variables yielded mean motilities >70 % upon thawing, all using dilution ratios of 1:2; four had acetate as the diluent and the fifth had BPSE. Successful artificial insemination (AI) using the frozen - thawed semen may have been achieved in one instance using the acetate diluent, 10% DMSO (v/ v), a 1:2 dilution ratio, a holding time of 60 min and an equilibration time of 45 min: 1 of 2 eggs produced was fertile.
Show less - Date Issued
- 1986
- PURL
- http://purl.flvc.org/fcla/dt/14323
- Subject Headings
- Frozen semen, Budgerigar--Breeding
- Format
- Document (PDF)
- Title
- Seasonal breeding aggregations in low-density populations of the bathyal echinoid Stylocidaris lineata.
- Creator
- Young, Craig M., Tyler, Paul A., Cameron, J. Lane, Rumrill, S. G., Harbor Branch Oceanographic Institute
- Date Issued
- 1992
- PURL
- http://purl.flvc.org/FCLA/DT/3338506
- Subject Headings
- Echinoidea, Cidaroida, Sea urchins--Reproduction, Breeding
- Format
- Document (PDF)
- Title
- Improving triploidy induction in the hard clam Mercenaria mercenaria notata: cytological evaluation of fertilized eggs.
- Creator
- El-Wazzan, Eman, Scarpa, John
- Date Issued
- 2009
- PURL
- http://purl.flvc.org/FCLA/DT/1076531
- Subject Headings
- Clams --Breeding, Cytology, Polyploidy, Bivlaves --Cytology
- Format
- Document (PDF)
- Title
- Hatching, fledging success and thermoregulatory behaviors of roof-nesting least terns (Sterna antillarum).
- Creator
- Cimbaro, John Stephen., Florida Atlantic University, Mahoney, Sheila A.
- Abstract/Description
-
Least Terns (Sterna antillarum) have recently shifted from traditional beach nesting sites to flat gravel roofs in parts of their range. In an attempt to determine whether the thermal environment of novel roof sites contributes to nesting success relative to that of traditional sites, hatching and fledging success and fifteen possible thermoregulatory behaviors of roof-nesting Least Terns were examined at four sites in Palm Beach County, Florida in 1992. The mean numbers of chicks and...
Show moreLeast Terns (Sterna antillarum) have recently shifted from traditional beach nesting sites to flat gravel roofs in parts of their range. In an attempt to determine whether the thermal environment of novel roof sites contributes to nesting success relative to that of traditional sites, hatching and fledging success and fifteen possible thermoregulatory behaviors of roof-nesting Least Terns were examined at four sites in Palm Beach County, Florida in 1992. The mean numbers of chicks and fledglings produced/nest (1.13 and 0.70, respectively) were significantly higher than those reported in other recent studies, indicating that nesting on some roofs is successful and may be a good alternative to beach locations. There was no difference between equivalent temperatures at the roofs and at a nearby beach, thereby suggesting that the new thermal environments of roofs do not adversely influence hatching and fledging success in Least Terns.
Show less - Date Issued
- 1993
- PURL
- http://purl.flvc.org/fcla/dt/14900
- Subject Headings
- Sternula antillarum--Breeding, Birds--Infancy, Nest building
- Format
- Document (PDF)
- Title
- Breeding season and fecundity of Gopherus polyphemus in South Florida.
- Creator
- Strattan, Melody., Harriet L. Wilkes Honors College
- Abstract/Description
-
The gopher tortoise, Gopherus polyphemus, is a threatened species native to the southeastern United States. The breeding season of G. polyphemus is reportedly from April to June. However, out of season hatchlings in Jupiter, Florida, suggest that in South Florida, the very southernmost part of the gopher tortoise's range, the warmer climate allows a longer period of reproduction or a year-round breeding season. My research sought to find evidence for an extended breeding season and to collect...
Show moreThe gopher tortoise, Gopherus polyphemus, is a threatened species native to the southeastern United States. The breeding season of G. polyphemus is reportedly from April to June. However, out of season hatchlings in Jupiter, Florida, suggest that in South Florida, the very southernmost part of the gopher tortoise's range, the warmer climate allows a longer period of reproduction or a year-round breeding season. My research sought to find evidence for an extended breeding season and to collect fecundity data on the South Florida tortoises by capturing female tortoises and X-raying them at different times of the year to check for the presence of eggs. Although I found no conclusive proof of an extended breeding season, I present additional circumstantial evidence for it, as well as information regarding the fecundity of tortoises in the spring.
Show less - Date Issued
- 2007
- PURL
- http://purl.flvc.org/FAU/11604
- Subject Headings
- Gopher tortoise, Reproduction, Gopher tortoise, Breeding, Wildlife conservation, Wildlife management
- Format
- Document (PDF)
- Title
- Population trends and breeding ecology of the Florida burrowing owl (Athene cunicularia floridana) on the Florida Atlantic University campus, 1990--2003.
- Creator
- McKie, Annabelle C., Florida Atlantic University, Mahoney, Sheila A.
- Abstract/Description
-
From 1990 to 2003 a study of the declining population of Burrowing Owls (Athene cunicularia floridana) on the Florida Atlantic University campus in Palm Beach County indicated that the location of unsuccessful owl (those not producing chicks) territories was the cause of their decline. Over the 14 years, the number of successful adult owls and the number of chicks remained fairly constant because they were located in areas where campus expansion remained minimal. Also, 76% of owls that reused...
Show moreFrom 1990 to 2003 a study of the declining population of Burrowing Owls (Athene cunicularia floridana) on the Florida Atlantic University campus in Palm Beach County indicated that the location of unsuccessful owl (those not producing chicks) territories was the cause of their decline. Over the 14 years, the number of successful adult owls and the number of chicks remained fairly constant because they were located in areas where campus expansion remained minimal. Also, 76% of owls that reused territories were reproductively successful, whereas only 43% of owls on newly-established territories were successful. Additionally, territories occupied for seven years or more averaged 1.27 chicks per territory per year, while territories occupied less than seven years averaged 0.17 chicks. Furthermore, all of the territories occupied for seven years or more produced chicks, but only 58% of territories occupied less than seven years did so. Territories located in Pomello sand produced more chicks, as burrows there never flooded and also were less exposed to construction. Chicks from territories with one burrow dispersed faster (75 days of age) than did those from territories with two or more burrows (119 days of age).
Show less - Date Issued
- 2003
- PURL
- http://purl.flvc.org/fcla/dt/13093
- Subject Headings
- Athene (Birds)--Florida, Burrowing owl--Ecology, Burrowing owl--Breeding
- Format
- Document (PDF)
- Title
- Sex determination of loggerhead sea turtles (Caretta caretta) via hormonal analysis by high performance liquid chromatography.
- Creator
- Botterill, Brooke L., Florida Atlantic University, Milton, Sarah L.
- Abstract/Description
-
Sea turtles have temperature-dependent sex determination, with males being produced at cooler temperatures and females at warmer ones. Thus, sex ratios are often estimated on average nest temperatures, but this is unreliable. Therefore, many studies have begun to look to alternative methods to identify sex ratios. Other methods used to determine sex require hatchling sacrifice or are labor intensive. This study utilized high performance liquid chromatography (HPLC) to investigate correlations...
Show moreSea turtles have temperature-dependent sex determination, with males being produced at cooler temperatures and females at warmer ones. Thus, sex ratios are often estimated on average nest temperatures, but this is unreliable. Therefore, many studies have begun to look to alternative methods to identify sex ratios. Other methods used to determine sex require hatchling sacrifice or are labor intensive. This study utilized high performance liquid chromatography (HPLC) to investigate correlations between steroid hormone levels in hatchling plasma and allantoic fluid, nest temperature and sex. Hatchling sex was determined laparoscopically to ground-truth hormone profiles. No correlation was found between hormones, nest temperature and sex. However, as hormones were readily detectable by HPLC, the technique may be applicable to juvenile or adult turtles with mature profiles.
Show less - Date Issued
- 2005
- PURL
- http://purl.flvc.org/fcla/dt/13284
- Subject Headings
- Sea turtles--Nests--United States, Loggerhead turtle--Breeding, Sex (Biology), High performance liquid chromatography
- Format
- Document (PDF)
- Title
- Determination of sex ratios and their relationship to nest temperature of loggerhead sea turtle (Caretta caretta, L.) hatchlings produced along the southeastern Atlantic coast of the United States.
- Creator
- Blair, Kimberly., Florida Atlantic University, Wyneken, Jeanette
- Abstract/Description
-
The sex ratios of hatchling loggerheads (Caretta caretta) were determined to provide robust assessments of regional and seasonal contributions of males and females to the population. Hatchlings from nests along the Atlantic coastline were raised to 120 g, sexed laparoscopically and verified histologically. Sex ratios differed at the beach, subseason, and subpopulation levels. There was no difference in overall sex ratios between the two study years. Average nest temperature and incubation...
Show moreThe sex ratios of hatchling loggerheads (Caretta caretta) were determined to provide robust assessments of regional and seasonal contributions of males and females to the population. Hatchlings from nests along the Atlantic coastline were raised to 120 g, sexed laparoscopically and verified histologically. Sex ratios differed at the beach, subseason, and subpopulation levels. There was no difference in overall sex ratios between the two study years. Average nest temperature and incubation durations were not accurate sex ratio correlates. Temperatures that produced female biased or male biased sex ratios overlapped in ranges with those producing a single sex. I found that the Transitional Range of Temperatures for loggerhead sea turtles is approximately 26.5°C--32°C, and the best correlation between average temperature and sex ratio occurred at 50--65% of incubation. Further studies are needed to define the roles of other environmental factors or the responses of tissues in loggerhead sex determination.
Show less - Date Issued
- 2005
- PURL
- http://purl.flvc.org/fcla/dt/13197
- Subject Headings
- Sea turtles--Nests--United States, Sex (Biology), Sea turtles--Atlantic Coast (U S ), Loggerhead turtle--Nests, Loggerhead turtle--Breeding
- Format
- Document (PDF)
- Title
- Modeling Long-Term Changes, 1958-2011, In The Reproduction And Territory Dynamics Of Bald Eagles Of Florida Bay, Southern Coastal Everglades.
- Creator
- Bosley, Jason W., Noonburg, Erik G., Florida Atlantic University, Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
As top-level piscivores, Bald Eagles are a compelling subject for the study of territory dynamics and are highly representative of the distinctive suite of avian species that occupy Florida Bay. Despite successful recovery of Bald Eagles (Haliaeetus leuocephalus) throughout the species range, the population breeding within Florida Bay has not mirrored this trend. Beginning in the late 1980s, Florida Bay has suffered in its capacity to support species diversity and abundance as a result of...
Show moreAs top-level piscivores, Bald Eagles are a compelling subject for the study of territory dynamics and are highly representative of the distinctive suite of avian species that occupy Florida Bay. Despite successful recovery of Bald Eagles (Haliaeetus leuocephalus) throughout the species range, the population breeding within Florida Bay has not mirrored this trend. Beginning in the late 1980s, Florida Bay has suffered in its capacity to support species diversity and abundance as a result of extreme changes in hydrology related to altered flows of incoming freshwater. In fact, Bald Eagle territory use in Florida Bay has declined by as much as 43% as year to year variation and sensitivity to transitions between territory states have increased. Florida Bay’s populations of other large, conspicuous fish-eating birds, including Ospreys, Great White Herons, Roseate Spoonbills, and Reddish Egrets each exhibit a similar pattern of decline. The effects of environmental degradation throughout Florida Bay are magnified at higher trophic levels. The negative trend in territory occupancy is most pronounced in southeast Florida Bay whereas effects on territory occupancy in the northwest are minimal. The presence of spatial patterns in territory occupancy, despite regionally available breeding birds, suggests that individuals are evaluating differences in habitat quality for which certain territories are no longer considered viable. Building on our current understanding of the health of this population of Bald Eagles, we have successfully implemented modeling approaches that identify key territory breeding decisions. Loss of early breeding season activity (occupied and active territories) despite maintaining high breeding success indicates that changes in territory dynamics are the result of a failure to breed and not a reproductive failure. As such, future conservation actions should promote early breeding season activity (decisions by breeding pairs to initiate nesting) in areas of Florida Bay that were historically occupied but are now abandoned.
Show less - Date Issued
- 2017
- PURL
- http://purl.flvc.org/fau/fd/FA00004859, http://purl.flvc.org/fau/fd/FA00004859
- Subject Headings
- Bald eagle--Everglades National Park--Florida Bay--Geographical distribution., Bald eagle--Breeding--Everglades National Park--Florida Bay., Bald eagle--Habitat--Everglades National Park--Florida Bay., Bird populations--Conservation--Florida.
- Format
- Document (PDF)
