Molecular ecology and evolution of elasmobranch reproductive strategies

Elasmobranchs are a diverse group of cartilaginous fishes consisting of sharks and batoids that exhibit a variety of reproductive strategies. Elasmobranch reproductive biology has been studied in the wild for many decades but molecular techniques have been used more recently to broaden understanding...

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Bibliographic Details
Main Author: Swift, Dominic
Other Authors: Portnoy, David S., Grubbs, R. Dean, Bird, Christopher E., Hogan, J. Derek, Szczerbinska, Barbara
Format: Doctoral or Postdoctoral Thesis
Language:English
Published: 2022
Subjects:
MHC
Online Access:https://hdl.handle.net/1969.6/94016
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spelling fttexasamucorpus:oai:tamucc-ir.tdl.org:1969.6/94016 2023-10-25T01:41:40+02:00 Molecular ecology and evolution of elasmobranch reproductive strategies Swift, Dominic Portnoy, David S. Grubbs, R. Dean Bird, Christopher E. Hogan, J. Derek Szczerbinska, Barbara 2022-08 261 pages application/pdf https://hdl.handle.net/1969.6/94016 en_US eng https://hdl.handle.net/1969.6/94016 Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ Blacktip shark fisheries local adaptation mate choice MHC philopatry Text Dissertation 2022 fttexasamucorpus 2023-09-25T10:23:53Z Elasmobranchs are a diverse group of cartilaginous fishes consisting of sharks and batoids that exhibit a variety of reproductive strategies. Elasmobranch reproductive biology has been studied in the wild for many decades but molecular techniques have been used more recently to broaden understanding. Though polyandry has been demonstrated to be widespread, the benefits to females are unclear. Similarly, multiple species have been shown to re-use nurseries – which may increase juvenile survival – yet the impacts of this behavior on population structure require further study. Molecular studies using high-throughput sequencing can help to address knowledge gaps; however, the application of these techniques to study elasmobranchs is limited. Therefore, this dissertation examined elasmobranch reproductive strategies using high throughput approaches. The first chapter reviewed research on elasmobranch reproductive strategies and outlined how high-throughput data can help to address knowledge gaps. For the three other chapters, the blacktip shark (Carcharhinus limbatus) was studied to advance understanding of mate choice and nursery use and inform management. Chapter two assessed for MHC-associated mate choice. Evidence of assortative choice for mhc1a was observed in four of six litters but further study is needed to validate this observation. Chapter three examined the influence of philopatry on the genetic population structure of blacktip sharks using young-of-the-year sampled in United States waters. Regional philopatry by males and females has contributed to the formation of three genetically distinct units that closely align with fishing stocks. Furthermore, philopatry by females to environmentally heterogenous estuaries where offspring are born appears to have resulted in fine-scale adaptive structure within management units. Chapter four assessed the genetic stock structure and movement of blacktip sharks sampled across the western North Atlantic Ocean to evaluate the potential for multinational fisheries ... Doctoral or Postdoctoral Thesis North Atlantic Texas A&M University - Corpus Christi: DSpace Repository
institution Open Polar
collection Texas A&M University - Corpus Christi: DSpace Repository
op_collection_id fttexasamucorpus
language English
topic Blacktip shark
fisheries
local adaptation
mate choice
MHC
philopatry
spellingShingle Blacktip shark
fisheries
local adaptation
mate choice
MHC
philopatry
Swift, Dominic
Molecular ecology and evolution of elasmobranch reproductive strategies
topic_facet Blacktip shark
fisheries
local adaptation
mate choice
MHC
philopatry
description Elasmobranchs are a diverse group of cartilaginous fishes consisting of sharks and batoids that exhibit a variety of reproductive strategies. Elasmobranch reproductive biology has been studied in the wild for many decades but molecular techniques have been used more recently to broaden understanding. Though polyandry has been demonstrated to be widespread, the benefits to females are unclear. Similarly, multiple species have been shown to re-use nurseries – which may increase juvenile survival – yet the impacts of this behavior on population structure require further study. Molecular studies using high-throughput sequencing can help to address knowledge gaps; however, the application of these techniques to study elasmobranchs is limited. Therefore, this dissertation examined elasmobranch reproductive strategies using high throughput approaches. The first chapter reviewed research on elasmobranch reproductive strategies and outlined how high-throughput data can help to address knowledge gaps. For the three other chapters, the blacktip shark (Carcharhinus limbatus) was studied to advance understanding of mate choice and nursery use and inform management. Chapter two assessed for MHC-associated mate choice. Evidence of assortative choice for mhc1a was observed in four of six litters but further study is needed to validate this observation. Chapter three examined the influence of philopatry on the genetic population structure of blacktip sharks using young-of-the-year sampled in United States waters. Regional philopatry by males and females has contributed to the formation of three genetically distinct units that closely align with fishing stocks. Furthermore, philopatry by females to environmentally heterogenous estuaries where offspring are born appears to have resulted in fine-scale adaptive structure within management units. Chapter four assessed the genetic stock structure and movement of blacktip sharks sampled across the western North Atlantic Ocean to evaluate the potential for multinational fisheries ...
author2 Portnoy, David S.
Grubbs, R. Dean
Bird, Christopher E.
Hogan, J. Derek
Szczerbinska, Barbara
format Doctoral or Postdoctoral Thesis
author Swift, Dominic
author_facet Swift, Dominic
author_sort Swift, Dominic
title Molecular ecology and evolution of elasmobranch reproductive strategies
title_short Molecular ecology and evolution of elasmobranch reproductive strategies
title_full Molecular ecology and evolution of elasmobranch reproductive strategies
title_fullStr Molecular ecology and evolution of elasmobranch reproductive strategies
title_full_unstemmed Molecular ecology and evolution of elasmobranch reproductive strategies
title_sort molecular ecology and evolution of elasmobranch reproductive strategies
publishDate 2022
url https://hdl.handle.net/1969.6/94016
genre North Atlantic
genre_facet North Atlantic
op_relation https://hdl.handle.net/1969.6/94016
op_rights Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
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