Processes Affecting Nursery Habitat Value of an Estuarine-Dependent Fish

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Material Information

Title:
Processes Affecting Nursery Habitat Value of an Estuarine-Dependent Fish
Physical Description:
1 online resource (194 p.)
Language:
english
Creator:
Barbour, Andrew B
Publisher:
University of Florida
Place of Publication:
Gainesville, Fla.
Publication Date:

Thesis/Dissertation Information

Degree:
Doctorate ( Ph.D.)
Degree Grantor:
University of Florida
Degree Disciplines:
Fisheries and Aquatic Sciences, Forest Resources and Conservation
Committee Chair:
BEHRINGER,DONALD CHARLES,JR
Committee Co-Chair:
LORENZEN,KAI
Committee Members:
ALLEN,MICHEAL S
PONCIANO CASTELLANOS,JOSE MIGUEL
ADAMS,AARON

Subjects

Subjects / Keywords:
barker -- cormack-jolly-seber -- mangroves -- pit -- snook -- telemetry
Forest Resources and Conservation -- Dissertations, Academic -- UF
Genre:
Fisheries and Aquatic Sciences thesis, Ph.D.
bibliography   ( marcgt )
theses   ( marcgt )
government publication (state, provincial, terriorial, dependent)   ( marcgt )
born-digital   ( sobekcm )
Electronic Thesis or Dissertation

Notes

Abstract:
Despite the value of estuarine and coastal ecosystems,which are in global decline, we lack a complete understanding of many of theprocesses contributing to the services systems like nursery habitatsprovide.  Numerous challenges makeaccurate identification of nursery habitats difficult, which has implicationsfor effective management. To improve mechanistic understanding of nursery habitat, Iconducted a mark-resighting study of juvenile snook, Centropomus undecimalis, in Charlotte Harbor, Florida, USA.  A cost-benefit analysis of a novelapplication of autonomous PIT tag antennae showed that this is a highlyefficient methodology worth the initial investment in estuarine systems.  The use of continuous-resighting data requiredevaluation of two survival analysis techniques. I determined that the Barker joint-data model was best suited for thesedata.  The unprecedented volume of continuous-resighting datarevealed multiple insights on juvenile habitat use.  Movements within and between creeks, as wellas apparent survival, were seasonally dependent.  Documented movement patterns suggest juvenilesnook use a nursery mosaic consisting of multiple mangrove creeks and theirconnecting habitats.  Furthermore, theuse of this nursery mosaic changed seasonally, with creek use being mostimportant in the winter.  Movement ofjuveniles was also directly related to adult presence, highlighting theimportance of a potential compensatory mechanism (inter-cohort cannibalism). It is likely that a spring out-migration from the creeksnegatively biased apparent survival estimates. Additionally, low apparent survival estimate values for the ‘firstcapture’ interval suggests the presence of transient individuals, which couldbe explained through a behavioral polymorphism wherein some individuals aremore likely to move than others.  Througha simulation, I found that disturbance events, such as occurred in the winterof 2010, could support the persistence of this behavioral polymorphism. This work revealed that individual movement within anoverall nursery mosaic, with seasonal changes in nursery use, is a valid earlylife history strategy for estuarine fishes. These findings have directimplications for snook management and habitat conservation, and suggest thatwork on other species might be reevaluated to determine if movement (ratherthan mortality) is a more important factor in the juvenile life stage thanpreviously assumed. Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable{mso-style-name:"Table Normal";mso-tstyle-rowband-size:0;mso-tstyle-colband-size:0;mso-style-noshow:yes;mso-style-priority:99;mso-style-parent:"";mso-padding-alt:0in 5.4pt 0in 5.4pt;mso-para-margin:0in;mso-para-margin-bottom:.0001pt;mso-pagination:widow-orphan;font-size:12.0pt;font-family:"Arial","sans-serif";mso-bidi-font-family:"Times New Roman";}
General Note:
In the series University of Florida Digital Collections.
General Note:
Includes vita.
Bibliography:
Includes bibliographical references.
Source of Description:
Description based on online resource; title from PDF title page.
Source of Description:
This bibliographic record is available under the Creative Commons CC0 public domain dedication. The University of Florida Libraries, as creator of this bibliographic record, has waived all rights to it worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law.
Statement of Responsibility:
by Andrew B Barbour.
Thesis:
Thesis (Ph.D.)--University of Florida, 2013.
Local:
Adviser: BEHRINGER,DONALD CHARLES,JR.
Local:
Co-adviser: LORENZEN,KAI.
Electronic Access:
RESTRICTED TO UF STUDENTS, STAFF, FACULTY, AND ON-CAMPUS USE UNTIL 2014-12-31

Record Information

Source Institution:
UFRGP
Rights Management:
Applicable rights reserved.
Classification:
lcc - LD1780 2013
System ID:
UFE0046142:00001