Temporal Trends in Abundance and Habitat Preferences of Deep Reef Fishes Off The Coast of South Carolina, USA

5.00
Hdl Handle:
http://hdl.handle.net/11286/620752
Title:
Temporal Trends in Abundance and Habitat Preferences of Deep Reef Fishes Off The Coast of South Carolina, USA
Authors:
Yeckley, Sean Paul
Abstract:
ROV and submersible video footage recorded in 1985, 2002, and 2010 from hard bottom habitat known as the Georgetown Hole or Charleston Lumps located NE of Charleston, SC in depths ranging from 175 – 300 m were reviewed to assess temporal trends in demersal fish abundance and bottom habitat preferences for key species. The main purpose of this long-term assessment of deep reef fish abundance and bottom habitat associations was to determine if deep reef fish populations have recovered since the development and implementation of the snapper/grouper fishery management plan (1983) and its various amendments. The major finding of the study was that Snowy Grouper and Blueline Tilefish were found in higher densities above low relief hard bottom areas than over high relief hard bottom. Snowy Grouper were observed to inhabit low relief hard bottom regions in significantly higher densities (18 fish/1000 m3) than over high relief hard bottom regions (3 fish/1000 m3) (P = .0001). Blueline Tilefish were found in the highest densities within low relief areas (5 fish/1000 m3) and mixed hard/soft bottom regions (6 fish/1000m3). The density of Snowy Grouper Hyporthodus niveatus increased from 2 fish per 1000 m3 in 1985 to 7 fish per 1000 m3 in 2010 and Blueline Tilefish Caulolatilus microps density increased from 0 fish in 1985 to 3 fish per 1000 m3 in 2010 so both populations are gradually rising. The density of Yellowfin Bass Anthias nicholsi decreased from 144 fish per 1000 m3 in 1985 to 56 fish per 1000 m3 in 2010. Yellowfin Bass preferred high relief habitat where they were found in the highest densities. Yellowfin Bass density decreased over low relief hard bottom from 199 fish per 1000 m3 in 1985 to only 15 fish per 1000 m3 in 2010. Abundance of Snowy Grouper and Blueline Tilefish have both increased from 1985 to 2010 predominantly within low relief bottom regions where they have significantly lowered prey populations of Yellowfin Bass and restored a balanced deep reef ecosystem.
Advisors:
Sedberry, George R.
Affiliation:
Department of Marine Sciences
Issue Date:
Apr-2017
URI:
http://hdl.handle.net/11286/620752
Type:
Thesis
Language:
en_US
Appears in Collections:
Graduate Student Theses; Department of Marine and Environmental Science

Full metadata record

DC FieldValue Language
dc.contributor.advisorSedberry, George R.-
dc.contributor.authorYeckley, Sean Paulen
dc.date.accessioned2017-04-27T01:58:33Z-
dc.date.available2017-04-27T01:58:33Z-
dc.date.issued2017-04-
dc.identifier.urihttp://hdl.handle.net/11286/620752-
dc.description.abstractROV and submersible video footage recorded in 1985, 2002, and 2010 from hard bottom habitat known as the Georgetown Hole or Charleston Lumps located NE of Charleston, SC in depths ranging from 175 – 300 m were reviewed to assess temporal trends in demersal fish abundance and bottom habitat preferences for key species. The main purpose of this long-term assessment of deep reef fish abundance and bottom habitat associations was to determine if deep reef fish populations have recovered since the development and implementation of the snapper/grouper fishery management plan (1983) and its various amendments. The major finding of the study was that Snowy Grouper and Blueline Tilefish were found in higher densities above low relief hard bottom areas than over high relief hard bottom. Snowy Grouper were observed to inhabit low relief hard bottom regions in significantly higher densities (18 fish/1000 m3) than over high relief hard bottom regions (3 fish/1000 m3) (P = .0001). Blueline Tilefish were found in the highest densities within low relief areas (5 fish/1000 m3) and mixed hard/soft bottom regions (6 fish/1000m3). The density of Snowy Grouper Hyporthodus niveatus increased from 2 fish per 1000 m3 in 1985 to 7 fish per 1000 m3 in 2010 and Blueline Tilefish Caulolatilus microps density increased from 0 fish in 1985 to 3 fish per 1000 m3 in 2010 so both populations are gradually rising. The density of Yellowfin Bass Anthias nicholsi decreased from 144 fish per 1000 m3 in 1985 to 56 fish per 1000 m3 in 2010. Yellowfin Bass preferred high relief habitat where they were found in the highest densities. Yellowfin Bass density decreased over low relief hard bottom from 199 fish per 1000 m3 in 1985 to only 15 fish per 1000 m3 in 2010. Abundance of Snowy Grouper and Blueline Tilefish have both increased from 1985 to 2010 predominantly within low relief bottom regions where they have significantly lowered prey populations of Yellowfin Bass and restored a balanced deep reef ecosystem.en
dc.language.isoen_USen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectFishery Policy Regulationsen
dc.subjectBiological Oceanographyen
dc.subjectPhysical Oceanographyen
dc.subjectPopulation Densityen
dc.subjectBottom Habitat Preferencesen
dc.subjectTrophic Systemen
dc.subjectPredator/Prey Dynamicsen
dc.subjectDeep Reef Ecologyen
dc.titleTemporal Trends in Abundance and Habitat Preferences of Deep Reef Fishes Off The Coast of South Carolina, USAen_US
dc.typeThesisen
dc.contributor.departmentDepartment of Marine Sciencesen
dc.contributor.committeememberHoskins-Brown, Dionne L.-
dc.contributor.committeememberPride, Carol J.-
This item is licensed under a Creative Commons License
Creative Commons
All Items in Savannah State University Repository are protected by copyright, with all rights reserved, unless otherwise indicated.