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139 results on '"Poulakis, Gregg"'

2. Morphology, composition, and deterioration of the embryonic rostral sheath of the smalltooth sawfish (Pristis pectinata)

Author

Poulakis, Gregg R., Wyffels, Jennifer T., Fortman, P. Eric, Wooley, Andrew K., Heath, Lukas B., Yakich, Dylan M., and Wilson, Patrick W.

Subjects
Chromatin, Pregnancy, Keratin, Collagen, Ethylenediaminetetraacetic acid, Skin, Infants (Newborn), Zoology and wildlife conservation
Abstract

Relationships between form and function have been the subject of many morphological and evolutionary studies (e.g., Dean et al., 2007; Kolmann et al., 2014). For example, elongated rostra have appeared [...]

Published
2024
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3. Correction to: Assessing the potential for red tide (Karenia brevis) algal bloom impacts on Atlantic tarpon (Megalops atlanticus) along the southwestern coast of Florida

Author

Griffin, Lucas P., Friess, Claudia, Bakenhaster, Micah D., Bassos‑Hull, Kim, Burnsed, Sarah Walters, Brownscombe, Jacob W., Cooke, Steven J., Ellis, Robert D., Gardiner, Jayne M., Locascio, James, Lowerre‑Barbieri, Susan, Poulakis, Gregg R., Wiley, Tonya R., Wilkinson, Krystan A., Wilson, JoEllen K., Wooley, Andrew K., Adams, Aaron J., and Danylchuk, Andy J.

Published
2023
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4. Assessing the potential for red tide (Karenia brevis) algal bloom impacts on Atlantic tarpon (Megalops atlanticus) along the southwestern coast of Florida

Author

Griffin, Lucas P., Friess, Claudia, Bakenhaster, Micah D., Bassos-Hull, Kim, Burnsed, Sarah Walters, Brownscombe, Jacob W., Cooke, Steven J., Ellis, Robert D., Gardiner, Jayne M., Locascio, James, Lowerre-Barbieri, Susan, Poulakis, Gregg R., Wiley, Tonya R., Wilkinson, Krystan A., Wilson, JoEllen K., Wooley, Andrew K., Adams, Aaron J., and Danylchuk, Andy J.

Published
2023
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5. Regional-scale variability in the movement ecology of marine fishes revealed by an integrative acoustic tracking network

Author

Friess, Claudia, Lowerre-Barbieri, Susan K., Poulakis, Gregg R., Hammerschlag, Neil, Gardiner, Jayne M., Kroetz, Andrea M., Bassos-Hull, Kim, Bickford, Joel, Bohaboy, Erin C., Ellis, Robert D., Menendez, Hayden, Patterson, William F., Price, Melissa E., Rehage, Jennifer S., Shea, Colin P., Smukall, Matthew J., Burnsed, Sarah Walters, Wilkinson, Krystan A., Young, Joy, Collins, Angela B., DeGroot, Breanna C., Peterson, Cheston T., Purtlebaugh, Caleb, Randall, Michael, Scharer, Rachel M., Schloesser, Ryan W., Wiley, Tonya R., Alvarez, Gina A., Danylchuk, Andy J., Fox, Adam G., Grubbs, R. Dean, Hill, Ashley, Locascio, James V., O’Donnell, Patrick M., Skomal, Gregory B., Whoriskey, Fred G., and Griffin, Lucas P.

Published
2021

10. Automated monitoring of fine-scale movements of the endangered smalltooth sawfish (Pristis pectinata)

Author

May, Rebecca K., Tolley, S. Gregory, Scharer, Rachel M., Dye, Bass, Jose, Felix, and Poulakis, Gregg R.

Subjects
Reefs, Telecommunications equipment, Time, Ports, Cellular transmission equipment, Telecommunications equipment, Zoology and wildlife conservation
Abstract

Abstract--Juvenile smalltooth sawfish (Pristis pectinata) were monitored in the Peace River, Florida. A series of 37 acoustic receivers was used throughout the river, 9 of which were time synchronized. In [...]

Published
2019
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11. Fine-scale behavior and habitat use of the endangered smalltooth sawfish (Pristis pectinata): insights from accelerometry

Author

Lear, Karissa O., Poulakis, Gregg R., Scharer, Rachel M., Gleiss, Adrian C., and Whitney, Nicholas M.

Subjects
CRC Press L.L.C., Wildlife conservation -- Protection and preservation, Book publishing -- Usage -- Protection and preservation, Endangered species -- Protection and preservation, Zoology and wildlife conservation
Abstract

Abstract--Determining movement, behavior, and activity patterns is of central importance to conservation efforts for threatened and endangered species because this knowledge is crucial for prioritizing management actions. In this study, [...]

Published
2019
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17. Long-term site fidelity of endangered smalltooth sawfish (Pristis pectinata) from different mothers

Author

Poulakis, Gregg R., Stevens, Philip W., Timmers, Amy A., Stafford, Christopher J., Chapman, Demian D., Feldheim, Kevin A., Heupel, Michelle R., and Curtis, Caitlin

Subjects
Thermo Fisher Scientific Inc., Scientific equipment and supplies industry -- Research, Estuaries -- Research, Endangered species -- Research, Zoology and wildlife conservation
Abstract

Abstract--Understanding how endangered species use nursery habitats is vital for recovery planning. Research on the smalltooth sawfish (Pristis pectinata) has shown that areas of estuarine nurseries, called hotspots, are used [...]

Published
2016
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18. Correction to: Assessing the potential for red tide (Karenia brevis) algal bloom impacts on Atlantic tarpon (Megalops atlanticus) along the southwestern coast of Florida

Author

Griffin, Lucas P., primary, Friess, Claudia, additional, Bakenhaster, Micah D., additional, Bassos‑Hull, Kim, additional, Burnsed, Sarah Walters, additional, Brownscombe, Jacob W., additional, Cooke, Steven J., additional, Ellis, Robert D., additional, Gardiner, Jayne M., additional, Locascio, James, additional, Lowerre‑Barbieri, Susan, additional, Poulakis, Gregg R., additional, Wiley, Tonya R., additional, Wilkinson, Krystan A., additional, Wilson, JoEllen K., additional, Wooley, Andrew K., additional, Adams, Aaron J., additional, and Danylchuk, Andy J., additional

Published
2022
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20. Assessing the potential for red tide (Karenia brevis) algal bloom impacts on Atlantic tarpon (Megalops atlanticus) along the southwestern coast of Florida

Author

Griffin, Lucas P., primary, Friess, Claudia, additional, Bakenhaster, Micah D., additional, Bassos-Hull, Kim, additional, Burnsed, Sarah Walters, additional, Brownscombe, Jacob W., additional, Cooke, Steven J., additional, Ellis, Robert D., additional, Gardiner, Jayne M., additional, Locascio, James, additional, Lowerre-Barbieri, Susan, additional, Poulakis, Gregg R., additional, Wiley, Tonya R., additional, Wilkinson, Krystan A., additional, Wilson, JoEllen K., additional, Wooley, Andrew K., additional, Adams, Aaron J., additional, and Danylchuk, Andy J., additional

Published
2022
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25. Environmental DNA evidence of the Critically Endangered smalltooth sawfish,Pristis pectinata, in historically occupied US waters

Author

Lehman, Ryan N., primary, Poulakis, Gregg R., additional, Scharer, Rachel M., additional, Hendon, Jill M., additional, Court, Alia G., additional, Wooley, Andrew K., additional, Williams, Ariel M., additional, Ajemian, Matthew J., additional, Hadden, John P., additional, Beal, Jeff L., additional, McCallister, Michael P., additional, and Phillips, Nicole M., additional

Published
2021
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28. Movescapes and eco‐evolutionary movement strategies in marine fish: Assessing a connectivity hotspot

Author

Lowerre‐Barbieri, Susan K., primary, Friess, Claudia, additional, Griffin, Lucas P., additional, Morley, Danielle, additional, Skomal, Gregory B., additional, Bickford, Joel W., additional, Hammerschlag, Neil, additional, Rider, Mitchell J., additional, Smukall, Matthew J., additional, Zinnicq Bergmann, Maurits P. M., additional, Guttridge, Tristan L., additional, Kroetz, Andrea M., additional, Grubbs, R. Dean, additional, Gervasi, Carissa L., additional, Rehage, Jennifer S., additional, Poulakis, Gregg R., additional, Bassos‐Hull, Kim, additional, Gardiner, Jayne M., additional, Casselberry, Grace A., additional, Young, Joy, additional, Perkinson, Matt, additional, Abercrombie, Debra L., additional, Addis, Dustin T., additional, Block, Barbara A., additional, Acosta, Alejandro, additional, Adams, Aaron J., additional, Danylchuk, Andy J., additional, Cooke, Steven J., additional, Whoriskey, Frederick G., additional, and Brownscombe, Jacob W., additional

Published
2021
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31. Genetic evidence supports a range extension for the Brazilian cownose ray Rhinoptera brasiliensis in the western North Atlantic

Author

Weber, Helen K., primary, Jones, Christian M., additional, Ajemian, Matthew J., additional, McCallister, Michael P., additional, Winner, Brent L., additional, Poulakis, Gregg R., additional, Bethea, Dana M., additional, Hollensead, Lisa D., additional, Zapf, Daniel, additional, Swenson, John D., additional, Hendon, Jill M., additional, Daly‐Engel, Toby S., additional, and Phillips, Nicole M., additional

Published
2020
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34. Environmental DNA evidence of the Critically Endangered smalltooth sawfish, Pristis pectinata, in historically occupied US waters.

Author

Lehman, Ryan N., Poulakis, Gregg R., Scharer, Rachel M., Hendon, Jill M., Court, Alia G., Wooley, Andrew K., Williams, Ariel M., Ajemian, Matthew J., Hadden, John P., Beal, Jeff L., McCallister, Michael P., and Phillips, Nicole M.

Subjects
WILDLIFE recovery, DNA, POLYMERASE chain reaction
Abstract

Formerly common in tropical and subtropical waters of the Atlantic Ocean, the Critically Endangered smalltooth sawfish, Pristis pectinata, underwent severe declines over the past century, restricting population(s) to south and south‐west Florida in the US, and Bahamian waters.Anecdotal evidence (e.g. encounter reports from the public) suggests that P. pectinata have recently been observed in historically occupied US waters; however, no directed surveys have been conducted to verify their extent of occupancy.Here, environmental DNA (eDNA) surveys were used to investigate the occurrence of P. pectinata in three formerly occupied estuaries in US waters. Water samples were collected in the summer from the Indian River Lagoon and Tampa Bay, Florida, in 2018 and 2019, and from Mississippi Sound, Mississippi, in 2018, and screened for target DNA using a highly sensitive Droplet Digital™ polymerase chain reaction assay.Target DNA was detected at four sites in the Indian River Lagoon in 2018 and at one site in 2019 (average concentration: 0.086 copies μl−1; SE = 0.004), but was not detected in either year in Tampa Bay. Target DNA was also detected at three sites near Deer Island in Mississippi Sound in 2018 (average concentration: 0.090 copies μl−1; SE = 0.005). These surveys provide additional lines of evidence that P. pectinata is re‐occurring within two historically occupied estuaries in US waters.More comprehensive eDNA surveys in historically occupied regions, combined with clearly defined post‐survey management actions, can direct additional research and outreach initiatives in emerging priority areas, fostering recovery of this Critically Endangered species. [ABSTRACT FROM AUTHOR]

Published
2022
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36. Genetic evidence supports a range extension for the Brazilian cownose ray Rhinoptera brasiliensis in the western North Atlantic.

Author

Weber, Helen K., Jones, Christian M., Ajemian, Matthew J., McCallister, Michael P., Winner, Brent L., Poulakis, Gregg R., Bethea, Dana M., Hollensead, Lisa D., Zapf, Daniel, Swenson, John D., Hendon, Jill M., Daly‐Engel, Toby S., and Phillips, Nicole M.

Subjects
NADH dehydrogenase, LAGOONS, MITOCHONDRIAL DNA, GENES, EVIDENCE
Abstract

We report 24 new records of the Brazilian cownose ray Rhinoptera brasiliensis outside its accepted geographic range. Sequencing of a 442‐base pair portion of the mitochondrial NADH dehydrogenase subunit 2 gene for 282 Rhinoptera samples revealed eight records off the east coast of the USA and 16 from the eastern Gulf of Mexico. Both sexes of all life stages were documented in all seasons over multiple years in the Indian River and Lake Worth lagoons, Florida, indicating that their range extends further in the western North Atlantic than previously described. [ABSTRACT FROM AUTHOR]

Published
2021
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39. Morphological conservation of rays in the genus Rhinoptera (Elasmobranchii, Rhinopteridae) conceals the occurrence of a large batoid, Rhinoptera brasiliensis Müller, in the northern Gulf of Mexico

Author

JONES, CHRISTIAN M., primary, HOFFMAYER, ERIC R., additional, HENDON, JILL M., additional, QUATTRO, JOSEPH M., additional, LEWANDOWSKI, JUSTIN, additional, ROBERTS, MARK A., additional, POULAKIS, GREGG R., additional, AJEMIAN, MATTHEW J., additional, DRIGGERS, WILLIAM B. III, additional, CARVALHO, MARCELO R. DE, additional, RÊGO, MARIANA G., additional, HAZIN, FÁBIO H. V., additional, and MÁRQUEZ-FARÍAS, J. FERNANDO, additional

Published
2017
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41. Use of encounter data to model spatio-temporal distribution patterns of endangered smalltooth sawfish, Pristis pectinata, in the western Atlantic

Author

Waters, John D., Coelho, Rui, Fernandez-Carvalho, Joana, Timmers, Amy A., Wiley, Tonya, Seitz, Jason C., Mcdavitt, Matthew T., Burgess, George H., and Poulakis, Gregg R.

Subjects
Ocean, Fish, Estuary, Modeling, Recreation, Fishing, Urban development, Distribution, Brackish, Endangered species
Abstract

1. Sawfishes are among themost threatened fish species globally,with only the smalltooth sawfish (Pristis pectinata) currently regularly observed in the westernAtlantic. TheNational Sawfish EncounterDatabase (NSED) documents reported encounters with sawfishes in the western Atlantic and contains 4945 reports of 8773 individual P. pectinata (1782–2011). 2. Statistical modelling (generalized linear models and generalized additive models) and kernel density analyses were used to (1) identify spatio-temporal patterns among encounter reports, including range reduction in the western Atlantic; (2) determine current distribution to identify areas and time periods where conservation and recovery efforts could be focused; and (3) identify and describe spatio-temporal distribution patterns of large juveniles and adults. 3. Pristis pectinata were found to be year-round residents of Florida but showed relatively consistent spatial and temporal trends by life stage throughout the year. Although the historical range in the western Atlantic included coastal waters from North Carolina to Brazil, the current geographic range of the species was limited to Florida from 2001 through 2011, with occasional reports in neighbouring states, the Bahamas, and Cuba. 4. Seasonally, encounters of all life stages peaked fromMarch through July and annual recruitment of juveniles was apparent during the study period. Spatial hotspots based on increased numbers of encounters of large juveniles (201–340 cm) and adults (>340 cm) were identified in southern Charlotte Harbor, the Ten Thousand Islands, Florida Bay, theAtlantic side of the FloridaKeys, and off St. Lucie in south-east Florida. The analyses presented herein provide evidence of range reduction in the western Atlantic, provide an important tool for resource managers to focus research, monitoring, and conservation efforts, and may provide a framework to model and predict habitat use of other species. info:eu-repo/semantics/publishedVersion

Published
2014

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