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Resolving Habitat Gaps for Bonefish Conservation Across Florida and the Bahamas.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Resolving Habitat Gaps for Bonefish Conservation Across Florida and the Bahamas./
作者:	Lombardo, Steven Michael.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2022,
面頁冊數:	180 p.
附註:	Source: Dissertations Abstracts International, Volume: 83-11, Section: B.
Contained By:	Dissertations Abstracts International83-11B.
標題:	Ecology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29161507
ISBN:	9798802710784

Resolving Habitat Gaps for Bonefish Conservation Across Florida and the Bahamas.
Lombardo, Steven Michael.

Resolving Habitat Gaps for Bonefish Conservation Across Florida and the Bahamas. - Ann Arbor : ProQuest Dissertations & Theses, 2022 - 180 p.

Source: Dissertations Abstracts International, Volume: 83-11, Section: B.

Thesis (Ph.D.)--Florida Atlantic University, 2022.

This item must not be sold to any third party vendors.

Bonefish Albula vulpes are an economically important sport fish that has historically bolstered the recreational flats fisheries of the Florida Keys and The Bahamas; an industry with an annual economic impact of US$465 million and US$169 million, respectively. Analyses of fishing guide logbooks and guide interviews indicate that the population of bonefish in south Florida has declined. Due to the economic and cultural importance of these fisheries, protection of spawning and nursery habitats is integral to population recovery and stability. However, knowledge gaps persist in how abiotic and biotic habitat factors influence reproduction and recruitment. Without clear delineation of spawning and recruitment habitats, bonefish populations remain vulnerable to anthropogenic disturbances.Bonefish partake in a unique three-point spawning migration, migrating from shallow-water home flats to form nearshore pre-spawning aggregations (PSA) before moving offshore to spawn. Using active acoustic telemetry, sonar imagery, and CTD profiles, the first complete account of offshore spawning movements and novel deep diving behavior was accomplished. Bonefish reached depths of 137.9 m and spawned at 67.3 m, a depth associated with the pycnocline/thermocline. Previous efforts show spatiotemporal plasticity in spawning, a behavior counter to other aggregation forming fishes.The dispersal of larvae produced from the observed spawning events in 2013, 2018, and 2019 were assessed through the construction of a biophysical larval dispersal model, incorporating new discoveries in the spawning movements and larval biology of bonefish. Coupling the NCOM AmSeas 3D hydrodynamic model with the Lagrangian Transport model program Ichthyop, 100 spawning events per year with 10000 larvae were simulated. Dispersal patterns revealed influential interactions with established current patterns, eddies, and ephemeral gyres that significantly impacted the sourcing of larvae throughout the Bahamian archipelago.The biotic and abiotic constructs of nursery habitats for Albula spp. were assessed for the estuaries of Florida by analyzing the FWC FIM long-term dataset (1996-2019). Catches of juvenile and co-occurring larval Albula spp. were noted within 10 Florida estuaries. Significant relationships with unstructured and vegetation-free benthic habitats were observed, while relationships with water quality indicate generalist tendencies. Exploitation of nursery habitat may be further dependent upon significant species associations.

ISBN: 9798802710784Subjects--Topical Terms:

516476
Ecology.
Subjects--Index Terms:

Acoustic telemetry

Resolving Habitat Gaps for Bonefish Conservation Across Florida and the Bahamas.
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520 $a Bonefish Albula vulpes are an economically important sport fish that has historically bolstered the recreational flats fisheries of the Florida Keys and The Bahamas; an industry with an annual economic impact of US$465 million and US$169 million, respectively. Analyses of fishing guide logbooks and guide interviews indicate that the population of bonefish in south Florida has declined. Due to the economic and cultural importance of these fisheries, protection of spawning and nursery habitats is integral to population recovery and stability. However, knowledge gaps persist in how abiotic and biotic habitat factors influence reproduction and recruitment. Without clear delineation of spawning and recruitment habitats, bonefish populations remain vulnerable to anthropogenic disturbances.Bonefish partake in a unique three-point spawning migration, migrating from shallow-water home flats to form nearshore pre-spawning aggregations (PSA) before moving offshore to spawn. Using active acoustic telemetry, sonar imagery, and CTD profiles, the first complete account of offshore spawning movements and novel deep diving behavior was accomplished. Bonefish reached depths of 137.9 m and spawned at 67.3 m, a depth associated with the pycnocline/thermocline. Previous efforts show spatiotemporal plasticity in spawning, a behavior counter to other aggregation forming fishes.The dispersal of larvae produced from the observed spawning events in 2013, 2018, and 2019 were assessed through the construction of a biophysical larval dispersal model, incorporating new discoveries in the spawning movements and larval biology of bonefish. Coupling the NCOM AmSeas 3D hydrodynamic model with the Lagrangian Transport model program Ichthyop, 100 spawning events per year with 10000 larvae were simulated. Dispersal patterns revealed influential interactions with established current patterns, eddies, and ephemeral gyres that significantly impacted the sourcing of larvae throughout the Bahamian archipelago.The biotic and abiotic constructs of nursery habitats for Albula spp. were assessed for the estuaries of Florida by analyzing the FWC FIM long-term dataset (1996-2019). Catches of juvenile and co-occurring larval Albula spp. were noted within 10 Florida estuaries. Significant relationships with unstructured and vegetation-free benthic habitats were observed, while relationships with water quality indicate generalist tendencies. Exploitation of nursery habitat may be further dependent upon significant species associations.
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