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Full-Text Articles in Biology
Genetic Population Dynamics Of The Critically Endangered Scalloped Hammerhead Shark (Sphyrna Lewini) In The Eastern Tropical Pacific, Sydney P. Harned, Andrea Bernard, Pelayo Salinas-De-Leon, Marissa Mehlrose, Jenifer Suarez, Yolani Robles, Sandra Bessudo Lion, Felipe Ladino, Andrés López Garo, Ilena Zanella, Kevin A. Feldheim, Mahmood Shivji
Genetic Population Dynamics Of The Critically Endangered Scalloped Hammerhead Shark (Sphyrna Lewini) In The Eastern Tropical Pacific, Sydney P. Harned, Andrea Bernard, Pelayo Salinas-De-Leon, Marissa Mehlrose, Jenifer Suarez, Yolani Robles, Sandra Bessudo Lion, Felipe Ladino, Andrés López Garo, Ilena Zanella, Kevin A. Feldheim, Mahmood Shivji
Biology Faculty Articles
The scalloped hammerhead shark, Sphyrna lewini, is a Critically Endangered, migratory species known for its tendency to form iconic and visually spectacular large aggregations. Herein, we investigated the population genetic dynamics of the scalloped hammerhead across much of its distribution in the Eastern Tropical Pacific (ETP), ranging from Costa Rica to Ecuador, focusing on young-of-year animals from putative coastal nursery areas and adult females from seasonal aggregations that form in the northern Galápagos Islands. Nuclear microsatellites and partial mitochondrial control region sequences showed little evidence of population structure suggesting that scalloped hammerheads in this ETP region comprise a single …
Comparative Population Genomics And Biophysical Modeling Of Shrimp Migration In The Gulf Of Mexico Reveals Current-Mediated Connectivity, Laura Timm, Lys M. Isma, Matthew Johnston, Heather D. Bracken-Grissom
Comparative Population Genomics And Biophysical Modeling Of Shrimp Migration In The Gulf Of Mexico Reveals Current-Mediated Connectivity, Laura Timm, Lys M. Isma, Matthew Johnston, Heather D. Bracken-Grissom
Biology Faculty Articles
The Gulf of Mexico experiences frequent perturbations, both natural and anthropogenic. To better understand the impacts of these events, we must inventory natural variability within the ecosystem, communities, species, and populations, and contextualize these findings in relation to physical features. Here, we present an integrated study of comparative population genomics and biophysical oceanography. Targeting three species of mesopelagic shrimp common to the Gulf of Mexico midwater (Acanthephyra purpurea, Systellaspis debilis, and Robustosergia robusta), we analyzed genetic diversity and population connectivity as proxies for species health and resilience, respectively. We also simulated a range of vertical migratory behaviors …
Comparative Population Genomics And Biophysical Modeling Of Shrimp Migration In The Gulf Of Mexico Reveals Current-Mediated Connectivity, Laura Timm, Lys M. Isma, Matthew Johnston, Heather D. Bracken-Grissom
Comparative Population Genomics And Biophysical Modeling Of Shrimp Migration In The Gulf Of Mexico Reveals Current-Mediated Connectivity, Laura Timm, Lys M. Isma, Matthew Johnston, Heather D. Bracken-Grissom
Biology Faculty Articles
The Gulf of Mexico experiences frequent perturbations, both natural and anthropogenic. To better understand the impacts of these events, we must inventory natural variability within the ecosystem, communities, species, and populations, and contextualize these findings in relation to physical features. Here, we present an integrated study of comparative population genomics and biophysical oceanography. Targeting three species of mesopelagic shrimp common to the Gulf of Mexico midwater (Acanthephyra purpurea, Systellaspis debilis, and Robustosergia robusta), we analyzed genetic diversity and population connectivity as proxies for species health and resilience, respectively. We also simulated a range of vertical migratory behaviors …
Global Genetic Connectivity And Diversity In A Shark Of High Conservation Concern, The Oceanic Whitetip, Carcharhinus Longimanus, Cassandra L. Ruck
Global Genetic Connectivity And Diversity In A Shark Of High Conservation Concern, The Oceanic Whitetip, Carcharhinus Longimanus, Cassandra L. Ruck
HCNSO Student Theses and Dissertations
The oceanic whitetip shark, Carcharhinus longimanus, is a circumtropical pelagic shark of high conservation concern (IUCN Red List: “Critically Endangered” in the Western North and Western Central Atlantic and “Vulnerable” globally). I present the first, population genetic assessment of the oceanic whitetip shark on a global scale, based on analysis of two mitochondrial genome regions (entire 1066-1067 bp control region and 784 bp partial ND4 gene), and nine nuclear microsatellite loci. No population structure was detected within the Western Atlantic. However, highly significant population structure was detected between Western Atlantic and Indo-Pacific Ocean sharks across all markers. Additionally, a …