Current Search: Queen conch (x)
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(21 - 32 of 32)
Pages
- Title
- Metamorphic response of queen conch (Strombus gigas) larvae exposed to sediment and water from nearshore and offshore sites in the Florida Keys.
- Creator
- Kowalik, Gretchen A., Davis, Megan, Shawl, Amber L., Glazer, Robert A., Delgado, Gabriel A., Evans, Chris
- Date Issued
- 2006
- PURL
- http://purl.flvc.org/FCLA/DT/2147048
- Subject Headings
- Queen conch, Aquaculture, Marine ecology --Florida
- Format
- Document (PDF)
- Title
- Queen conch ranching and educational outreach as part of the Seaflower Biosphere Reserve, Colombia.
- Creator
- Shawl, Amber L., Prada, M., Castro, E., Taylor, E., Davis, Megan
- Date Issued
- 2007
- PURL
- http://purl.flvc.org/FCLA/DT/3340790
- Subject Headings
- Queen conch, Queen conch fisheries, Biosphere reserves, Ranching, Fishery management, Education
- Format
- Document (PDF)
- Title
- An historical overview of queenconch mariculture.
- Creator
- Creswell, R. LeRoy, Harbor Branch Oceanographic Institute
- Date Issued
- 1994
- PURL
- http://purl.flvc.org/fau/fd/FA00007262
- Subject Headings
- Queen conch, Strombus gigas, Mariculture, Aquaculture--History
- Format
- Document (PDF)
- Title
- Improving the culture conditions of juvenile queenconch (Strombus gigas Linne) for grow out purposes.
- Creator
- Spring, Ashley, Davis, Megan
- Date Issued
- 2003
- PURL
- http://purl.flvc.org/fau/fd/FA00007398
- Subject Headings
- Queen conch, Strombus gigas, Aquaculture, Aquaculture--methods
- Format
- Document (PDF)
- Title
- An investigation of nearshoreflow patterns in the central Bahamas: implications for transport of queen conch (Strombus gigas)larvae.
- Creator
- Pitts, Patrick A., Harbor Branch Oceanographic Institute
- Date Issued
- 1998
- PURL
- http://purl.flvc.org/fau/fd/FA00007311
- Subject Headings
- Bahamas, Queen conch, Strombus gigas, Larvae--Dispersal, Ocean currents
- Format
- Document (PDF)
- Title
- Relationships between seagrass bed characteristics and juvenile queen conch (Strombus gigas Linne) abundance in the Bahamas.
- Creator
- Stoner, Allan W., Lin, Junda, Hanisak, M. Dennis
- Date Issued
- 1995
- PURL
- http://purl.flvc.org/FCLA/DT/3174041
- Subject Headings
- Seagrasses, Queen conch, Algae, Multivariate analysis, Sediment, Suspended
- Format
- Document (PDF)
- Title
- REESTABLISHMENT OF A QUEEN CONCH, LOBATUS GIGAS, BREEDING POPULATION IN A MARINE PROTECTED AREA IN THE BAHAMAS.
- Creator
- Norton, Laura E. Issac, Davis, Megan, Florida Atlantic University, Department of Biological Sciences, Charles E. Schmidt College of Science
- Abstract/Description
-
The queen conch, Lobatus gigas, is key to the Bahamian way of life. Recent studies suggest that commercial stocks will be depleted in The Bahamas in 10-15 years. In response to this, an egg farm was established in a historic breeding ground in Moriah Harbour Cay National Park, Exuma, Bahamas. Previously used for aquaculture, the egg farm concept was tested as a restoration method. Conch were tagged (n=251) and stocked in a 1,385 m2 (0.14 ha) circular enclosure at an equivalent density of 1...
Show moreThe queen conch, Lobatus gigas, is key to the Bahamian way of life. Recent studies suggest that commercial stocks will be depleted in The Bahamas in 10-15 years. In response to this, an egg farm was established in a historic breeding ground in Moriah Harbour Cay National Park, Exuma, Bahamas. Previously used for aquaculture, the egg farm concept was tested as a restoration method. Conch were tagged (n=251) and stocked in a 1,385 m2 (0.14 ha) circular enclosure at an equivalent density of 1,813/ha or 1 conch/5.5 m2. The egg farm was visited every 24-48 hours during the study period (May 26-August 14, 2019) to examine conch distribution, burial, predation, breeding, and egg mass laying. Queen conch Essential Fish Habitat was characterized in this study, contributing to a knowledge gap concerning conch spawning areas. No egg masses were laid, despite temperature, sediment solid-phase organics, calcium carbonate, and other seagrass habitat characteristics displaying similarities to previous studies in which conch spawned. It is speculated that egg laying did not occur due to handling disturbances, which may have caused the conch to resorb their gonads. Comprehensive recommendations are made for future egg farms intended for restoration.
Show less - Date Issued
- 2020
- PURL
- http://purl.flvc.org/fau/fd/FA00013458
- Subject Headings
- Queen Conch, Bahamas, Marine protected areas, Ecosystem restoration
- Format
- Document (PDF)
- Title
- Phototaxis and vertical migration of the queen conch (Strombus gigas linne) veliger larvae.
- Creator
- Barile, Peter J., Stoner, Allan W., Young, Craig M., Harbor Branch Oceanographic Institute
- Date Issued
- 1994
- PURL
- http://purl.flvc.org/FCLA/DT/3331889
- Subject Headings
- Queen conch, Strombus gigas, Larvae--Dispersal, Vertical migration (Aquatic biology), Vertical distribution (Aquatic biology), Phototaxis
- Format
- Document (PDF)
- Title
- Conch in the classroom: integrating queen conch activities in the curriculum.
- Creator
- Shawl, Amber L., Harbor Branch Oceanographic Institute
- Date Issued
- 2006
- PURL
- http://purl.flvc.org/FCLA/DT/2144791
- Subject Headings
- Marine biology --Study and teaching --Florida, Queen conch, Marine sciences --Study and teaching --Florida
- Format
- Document (PDF)
- Title
- Assessment of multiple paternity for the queen conch, Strombus gigas.
- Creator
- Harris, Chris., Harriet L. Wilkes Honors College
- Abstract/Description
-
The commercially important queen conch, Strombus gigas, has been observed copulating with multiple partners and laying multiple egg masses during a reproductive season (Randall, 1964). While multiple paternity has been confirmed using microsatellite based genetic analysis for a variety of other gastropods, this technique has not been employed for S. gigas. Determining whether or not this species is capable of multiple paternity is important to understanding and maintaining genetic diversity...
Show moreThe commercially important queen conch, Strombus gigas, has been observed copulating with multiple partners and laying multiple egg masses during a reproductive season (Randall, 1964). While multiple paternity has been confirmed using microsatellite based genetic analysis for a variety of other gastropods, this technique has not been employed for S. gigas. Determining whether or not this species is capable of multiple paternity is important to understanding and maintaining genetic diversity of natural and captive populations. While an assessment of multiple paternity is the ultimate goal of this study, for my thesis, I have completed preliminary work which includes perfecting methods of tissue collection, DNA extraction, and DNA amplification with six non-labeled polymorphic microsatellite molecular markers, using cultured Strombus gigas animals. In addition, I collected tissue and extracted DNA from three wild S. gigas adult females and their egg masses from Pelican Shoal in the Florida Keys.
Show less - Date Issued
- 2008
- PURL
- http://purl.flvc.org/FAU/77671
- Subject Headings
- Gastropoda, Habitat, Queen conch, Conservation, Biological diversity, Marine biology, Mariculture
- Format
- Document (PDF)
- Title
- Captive breeding for the gastropod conch (Strombus spp.).
- Creator
- Shawl, Amber L., Davis, Megan, Corsaut, Jerry
- Date Issued
- 2003
- PURL
- http://purl.flvc.org/FCLA/DT/2171956
- Subject Headings
- Gastropoda --Reproduction, Queen conch, Fisheries --Caribbean Sea --Congresses, Fisheries --Mexico, Gulf of --Congresses, Gastropoda --Eggs --Identification, Marine ecology --Experiments
- Format
- Document (PDF)
- Title
- Toxicity and availability of copper and zinc to queen conch: implications for larval recruitment in the Florida Keys.
- Creator
- Garr, Amber L., Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
The presence of heavy metals and other pollutants is detrimental to marine ecosystems. The queen conch, once an important fisheries species in the Florida Keys, has not sufficiently recovered after a 25-year fishery closure. Research has shown high levels of copper and zinc in the gonads and digestive glands of adult conch found in the nearshore waters. Four sites relevant to queen conch larval recruitment were tested in 2010 for the presence of copper and zinc in the water, phytoplankton,...
Show moreThe presence of heavy metals and other pollutants is detrimental to marine ecosystems. The queen conch, once an important fisheries species in the Florida Keys, has not sufficiently recovered after a 25-year fishery closure. Research has shown high levels of copper and zinc in the gonads and digestive glands of adult conch found in the nearshore waters. Four sites relevant to queen conch larval recruitment were tested in 2010 for the presence of copper and zinc in the water, phytoplankton, sediment, and seagrass epiphytes over seven months. Both metals were detected in all sample types and no seasonal or geographical differences were detected. Surface water concentrations from the field were used to conduct acute and chronic toxicity tests on various ages of queen conch larvae and their phytoplankton food source. When zinc concentrations (0-40 (So(Bg/L) similar to those measured in situ were used, there was no significant impact on conch larval survival although some velar lobe de velopment was impaired. However, field concentrations of copper (0-15 (So(Bg/L), which often surpassed water quality standards, negatively impacted growth, survival, and development of the larvae. Chronic exposure to copper, through the water and food, disrupted the metamorphic success of competent larvae and decreased post-metamorphosis survival. Exposure to copper at later life stages increased mortality, suggesting that heavy metals have a negative effect on larval recruitment in localized areas of the Florida Keys. Structural equation modeling revealed that copper and zinc are moving through the systems differently and are best represented by two different models.
Show less - Date Issued
- 2012
- PURL
- http://purl.flvc.org/FAU/3342102
- Subject Headings
- Gastropoda, Habitat, Queen conch, Conservation, Marine invertebrates, Larvae, Trace elements, Environmental aspects
- Format
- Document (PDF)
