DOCSLIB.ORG

Enhancement of Gulf Killifish, Fundulus Grandis, Fitness And

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Enhancement of Gulf Killifish, Fundulus Grandis, Fitness And Louisiana State University LSU Digital Commons LSU Doctoral Dissertations Graduate School 2014 Enhancement of Gulf killifish, Fundulus grandis, fitness and reproduction Joshua Thomas Patterson Louisiana State University and Agricultural and Mechanical College, [email protected] Follow this and additional works at: https://digitalcommons.lsu.edu/gradschool_dissertations Part of the Environmental Sciences Commons Recommended Citation Patterson, Joshua Thomas, "Enhancement of Gulf killifish, Fundulus grandis, fitness and reproduction" (2014). LSU Doctoral Dissertations. 2409. https://digitalcommons.lsu.edu/gradschool_dissertations/2409 This Dissertation is brought to you for free and open access by the Graduate School at LSU Digital Commons. It has been accepted for inclusion in LSU Doctoral Dissertations by an authorized graduate school editor of LSU Digital Commons. For more information, please [email protected]. ENHANCEMENT OF GULF KILLIFISH, FUNDULUS GRANDIS, FITNESS AND REPRODUCTION A Dissertation Submitted to the Graduate Faculty of the Louisiana State University and Agricultural and Mechanical College in partial fulfillment of the requirements for the degree of Doctor of Philosophy in The School of Renewable Natural Resources by Joshua T. Patterson B.S., George Mason University, 2006 M.S., Kentucky State University, 2010 May 2014 ACKNOWLEDGEMENTS I would like to thank my advisor Dr. Christopher Green for allowing me the opportunity to carry out my doctoral research at LSU. He taught me many valuable lessons on functioning as a professional scientist and provided vital support throughout my graduate education. Thanks to my committee members, Drs. Fernando Galvez, Robert Reigh, Timothy Schowalter, and Jacqueline Stephens for their comments and revision of my dissertation. Their advice and input were indispensable in developing and refining my research. Thanks also to Millie Williams and Dr. Michael Dowd for taking time out of busy schedules to share expertise. Taylor Allgood and Charlotte Bodinier contributed significantly to individual projects included in this dissertation and coauthored refereed manuscripts with me. This research would not have been possible without assistance from many undergraduates, graduate students, and research associates. Minley Bell, Kent Bollfrass, Chelsea Bonner, Sunny Brogan, Charlie Brown, Mike Coulon, Calvin Fisher, Craig Gothreaux, Chris Mariani, Emily McArdle, Zach McDaniel, Derek Nicholas, Donna Nissen, Heidi Oliver, Paige O’Malley, and Louann Walker were all instrumental in various aspects of this research project. I would like to especially acknowledge my friends and corner-officemates Kent Bollfrass, Chelsea Bonner, and Charlie Brown. Their willingness to provide professional and personal advice, or an occasional ride to the casino, was always greatly appreciated. Thanks to Karen Cambre, Suzette Diez, Nedra Ghoram, and Pamela Rupert; without whom, nothing gets done. My most important debt of gratitude is to my wife Marrissa (Justice) Patterson. In addition to our beautiful son, she has provided love, support, and assistance in a greater quantity and diversity of ways than I can list here. I also want to thank my parents, Thomas and Anne Marie, for their enduring sacrifice and devotion. ii TABLE OF CONTENTS ACKNOWLEDGEMENTS ............................................................................................................ ii LIST OF TABLES ...........................................................................................................................v LIST OF FIGURES ..................................................................................................................... viii ABSTRACT ................................................................................................................................... xi CHAPTER 1 GENERAL INTRODUCTION ................................................................................1 CHAPTER 2 EFFECTS OF LOW SALINITY MEDIA ON GROWTH, CONDITION, AND GILL ION TRANSPORTER EXPRESSION IN JUVENILE GULF KILLIFISH, FUNDULUS GRANDIS ...................................................................................................................6 Introduction .....................................................................................................................6 Methods .........................................................................................................................10 Results ...........................................................................................................................15 Discussion .....................................................................................................................18 CHAPTER 3 INTRASPECIFIC VARIATION IN REPRODUCTIVE POTENTIAL WITH MATERNAL BODY SIZE IN GULF KILLIFISH, FUNDULUS GRANDIS ...................26 Introduction ...................................................................................................................26 Methods .........................................................................................................................28 Results ...........................................................................................................................33 Discussion .....................................................................................................................35 CHAPTER 4 PHYSIOLOGICAL AND REPRODUCTIVE RESPONSE TO VARYING QUANTITATIVE LIPID INCLUSION IN DIETS FOR GULF KILLIFISH, FUNDULUS GRANDIS ................................................................................44 Introduction ...................................................................................................................44 Methods .........................................................................................................................46 Results ...........................................................................................................................52 Discussion .....................................................................................................................57 CHAPTER 5 DIET INDUCED FATTY ACID VARIATION IN CRITICAL TISSUES OF A SPAWNING ESTUARINE FISH AND CONSEQUENCES FOR LARVAL FITNESS....................................................................63 Introduction ...................................................................................................................63 Methods .........................................................................................................................66 Results ...........................................................................................................................73 Discussion .....................................................................................................................75 iii CHAPTER 6 PHYSIOLOGICAL MANAGEMENT OF ω-3 LONG CHAIN- POLYUNSATURATED FATTY ACID DEFICIENT DIETS BY SPAWNING GULF KILLIFISH, FUNDULUS GRANDIS ..........................................................84 Introduction ...................................................................................................................84 Methods .........................................................................................................................86 Results ...........................................................................................................................90 Discussion .....................................................................................................................91 CHAPTER 7 GENERAL SUMMARY AND CONCLUSIONS .................................................99 LITERATURE CITED ................................................................................................................103 APPENDIX A REPRINT PERMISSIONS ................................................................................120 APPENDIX B CHAPTER 5 SUPPLEMENTAL TABLES .......................................................123 APPENDIX C CHAPTER 6 SUPPLEMENTAL TABLES .......................................................128 VITA ............................................................................................................................................144 iv LIST OF TABLES 2.1 Mean (± SEM) water chemistry parameters throughout a 12-week growth trial on juvenile Fundulus grandis. ...............................................................................................16 2.2 Growth, survival, and condition data for juvenile Fundulus grandis reared in 0.5, 5.0, 8.0, and 12.0‰ for 84 days. Letters denote statistical significance across parameters (REGWQ; p < 0.05). ......................................................................................17 3.1 Mean ± SEM chorion volume (mm3), time to hatch (d), and percent survival to hatch for embryos produced by Fundulus grandis during a six week spawning period. Letters denote statistical significance among experimental female size classes (REGWQ; p<0.05). No significant difference was detected in probability of survival to hatch among female size classes (Wald X2=0.48; p=0.788). ..........................36 4.1 Formulation and analyzed proximate composition of experimental diets fed to Fundulus grandis in the lipid content experiment. ...........................................................46 4.2 Composition of selected fatty acids from menhaden fish oil utilized in formulation of experimental diets fed to Fundulus grandis in the lipid
Load more

Recommended publications
  • Fundulus Grandis): Subtitle Charles Alexander Brown Louisiana State University and Agricultural and Mechanical College, [email protected]
    Louisiana State University LSU Digital Commons LSU Master's Theses Graduate School 2011 Developmental responses to abiotic conditions during aquatic and air incubatoin of the Gulf killifish (Fundulus grandis): subtitle Charles Alexander Brown Louisiana State University and Agricultural and Mechanical College, [email protected] Follow this and additional works at: https://digitalcommons.lsu.edu/gradschool_theses Part of the Environmental Sciences Commons Recommended Citation Brown, Charles Alexander, "Developmental responses to abiotic conditions during aquatic and air incubatoin of the Gulf killifish (Fundulus grandis): subtitle" (2011). LSU Master's Theses. 2848. https://digitalcommons.lsu.edu/gradschool_theses/2848 This Thesis is brought to you for free and open access by the Graduate School at LSU Digital Commons. It has been accepted for inclusion in LSU Master's Theses by an authorized graduate school editor of LSU Digital Commons. For more information, please contact [email protected]. DEVELOPMENTAL RESPONSES TO ABIOTIC CONDITIONS DURING AQUATIC AND AIR INCUBATION OF THE GULF KILLIFISH (FUNDULUS GRANDIS) A Thesis Submitted to the Graduate Faculty of the Louisiana State University and Agricultural and Mechanical College in partial fulfillment of the requirements for the degree of Master of Science in The School of Renewable Natural Resources By Charles A. Brown B.S., Augusta State University, 2008 May 2011 ACKNOWLEDGMENTS I thank Dr. Christopher Green for serving as my major advisor. His dedication to my improvement as a student and professional is greatly appreciated. I thank my committee members, Dr. C. Greg Lutz, Dr. Michael D. Kaller, Dr. D. Allen Rutherford, and Dr. Fernando Galvez for their assistance and patience with my project.
    [Show full text]
  • 2017 Cerimele Nicole Thesis.Pdf (4.200Mb)
    UNIVERSITY OF OKLAHOMA GRADUATE COLLEGE EARLY MIDDLE ARCHAIC PLACEMAKING: A FAUNAL ANALYSIS OF THREE PIT DEPOSITS FROM SILVER GLEN SPRINGS (8LA1), FLORIDA A THESIS SUBMITTED TO THE GRADUATE FACULTY in partial fulfillment of the requirements for the Degree of MASTER OF ARTS By NICOLE GRACE CERIMELE Norman, Oklahoma 2017 EARLY MIDDLE ARCHAIC PLACEMAKING: A FAUNAL ANALYSIS OF THREE PIT DEPOSITS FROM SILVER GLEN SPRINGS (8LA1), FLORIDA A THESIS APPROVED FOR THE DEPARTMENT OF ANTHROPOLOGY BY _______________________________ Dr. Asa Randall, Chair ______________________________ Dr. Leland Bement ______________________________ Dr. Patrick Livingood © Copyright by NICOLE GRACE CERIMELE 2017 All Rights Reserved. DEDICATION To my husband, Josh, for welcoming me to the United States. Without his love and support this thesis would not have been possible. Also, to our son, expected December 2017. ACKNOWLEDGEMENTS First, I would like to give many thanks to my thesis committee, Dr. Asa Randall, Dr. Leland Bement, and Dr. Patrick Livingood, for their extensive guidance during the past two and a half years. I would also like to thank Department of Anthropology for allowing the opportunity to receive both the Morris E. Opler Memorial Scholarship and the Pat Gilman and Paul Minnis Scholarship, which allowed me to go to Florida to access the zooarchaeological collections at the Florida Museum of Natural History. I would especially like to thank Dr. Katherine Emery for providing access to the FMNH collections and Meggan Blessing, Nicole Cannarozzi, and Dr. Joshua Goodwin for their patience and time in educating me on the finer details of St. Johns riverine zooarchaeology. I would also like to thank both Dr.
    [Show full text]
  • Browning Washington 0250O 1
    Evidence of habitat associations and distribution patterns of rockfish in Puget Sound from archival data (1974-1977) Hilary F. Browning A thesis submitted in partial fulfillment of the requirements for the degree of Master of Marine Affairs University of Washington 2013 Committee: Terrie Klinger Ben Stewart-Koster Program Authorized to Offer Degree: School of Marine and Environmental Affairs 1 University of Washington Graduate School This is to certify that I have examined this copy of a master’s thesis by Hilary F. Browning and have found that it is complete and satisfactory in all respects, and that any and all revisions required by the final examining committee have been made. Committee Members: _____________________________________________________ Terrie Klinger _____________________________________________________ Ben Stewart-Koster Date: __________________________________ 2 In presenting this thesis in partial fulfillment of the requirements for a master’s degree at the University of Washington, I agree that the Library shall make its copies freely available for inspection. I further agree that extensive copying of this thesis is allowable only for scholarly purposes, consistent with “fair use” as prescribed in the U.S. Copyright Law. Any other reproduction for any purposes or by any means shall not be allowed without my written permission. Signature: _________________________________ Date: _____________________________________ 3 University of Washington ABSTRACT Evidence of habitat associations and distribution patterns of rockfish in Puget Sound from archival data (1974-1977) Hilary F. Browning Chair of Supervisory Committee: Associate Professor Terrie Klinger School of Marine and Environmental Affairs Rockfish (Sebastes spp.) populations have declined dramatically and failed to recover in Puget Sound, WA following a period of heavy exploitation in the 1970s and 1980s.
    [Show full text]
  • Rockfish (Sebastes) That Are Evolutionarily Isolated Are Also
    Biological Conservation 142 (2009) 1787–1796 Contents lists available at ScienceDirect Biological Conservation journal homepage: www.elsevier.com/locate/biocon Rockfish (Sebastes) that are evolutionarily isolated are also large, morphologically distinctive and vulnerable to overfishing Karen Magnuson-Ford a,b, Travis Ingram c, David W. Redding a,b, Arne Ø. Mooers a,b,* a Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby BC, Canada V5A 1S6 b IRMACS, Simon Fraser University, 8888 University Drive, Burnaby BC, Canada V5A 1S6 c Department of Zoology and Biodiversity Research Centre, University of British Columbia, #2370-6270 University Blvd., Vancouver, Canada V6T 1Z4 article info abstract Article history: In an age of triage, we must prioritize species for conservation effort. Species more isolated on the tree of Received 23 September 2008 life are candidates for increased attention. The rockfish genus Sebastes is speciose (>100 spp.), morpho- Received in revised form 10 March 2009 logically and ecologically diverse and many species are heavily fished. We used a complete Sebastes phy- Accepted 18 March 2009 logeny to calculate a measure of evolutionary isolation for each species and compared this to their Available online 22 April 2009 morphology and imperilment. We found that evolutionarily isolated species in the northeast Pacific are both larger-bodied and, independent of body size, morphologically more distinctive. We examined Keywords: extinction risk within rockfish using a compound measure of each species’ intrinsic vulnerability to Phylogenetic diversity overfishing and categorizing species as commercially fished or not. Evolutionarily isolated species in Extinction risk Conservation priorities the northeast Pacific are more likely to be fished, and, due to their larger sizes and to life history traits Body size such as long lifespan and slow maturation rate, they are also intrinsically more vulnerable to overfishing.
    [Show full text]
  • Management Plan for the Yelloweye Rockfish (Sebastes Ruberrimus) in Canada
    Proposed Species at Risk Act Management Plan Series Management Plan for the Yelloweye Rockfish (Sebastes ruberrimus) in Canada Yelloweye Rockfish 2018 Recommended citation: Fisheries and Oceans Canada. 2018. Management Plan for the Yelloweye Rockfish (Sebastes ruberrimus) in Canada [Proposed]. Species at Risk Act Management Plan Series. Fisheries and Oceans Canada, Ottawa. iv + 32 pp. Additional copies: For copies of the management plan, or for additional information on species at risk, including COSEWIC Status Reports, residence descriptions, action plans, and other related recovery documents, please visit the SAR Public Registry. Cover illustration: K.L. Yamanaka, Fisheries and Oceans Canada Également disponible en français sous le titre « Plan de gestion visant le sébaste aux yeux jaunes (Sebastes ruberrimus) au Canada [Proposition]» © Her Majesty the Queen in Right of Canada, represented by the Minister of the Environment, 2018. All rights reserved. ISBN ISBN to be included by SARA Responsible Agency Catalogue no. Catalogue no. to be included by SARA Responsible Agency Content (excluding the illustrations) may be used without permission, with appropriate credit to the source. Management Plan for the Yelloweye Rockfish [Proposed] 2018 Preface The federal, provincial, and territorial government signatories under the Accord for the Protection of Species at Risk (1996) agreed to establish complementary legislation and programs that provide for effective protection of species at risk throughout Canada. Under the Species at Risk Act (S.C. 2002, c.29) (SARA), the federal competent ministers are responsible for the preparation of a management plan for species listed as special concern and are required to report on progress five years after the publication of the final document on the Species at Risk Public Registry.
    [Show full text]
  • DRAFT Status of Quillback Rockfish Sebastes( Maliger) in U.S
    Agenda Item G.5 Supplemental REVISED Attachment 12 June 2021 DRAFT Status of quillback rockfish Sebastes( maliger) in U.S. waters off the coast of Washington in 2021 using catch and length data by Brian J. Langseth1 Chantel R. Wetzel1 Jason M. Cope1 Tien-Shui Tsou2 Lisa K. Hillier2 1Northwest Fisheries Science Center, U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, 2725 Montlake Boulevard East, Seattle, Washington 98112 2Washington Department of Fish and Wildlife, 600 Capital Way North, Olympia, Washington 98501 June 2021 © Pacific Fisheries Management Council, 2021 Correct citation for this publication: Langseth, B.J., C.R. Wetzel, J.M. Cope, T.S. Tsou, L.K. Hillier. 2021. DRAFT Status of quillback rockfish (Sebastes maliger) in U.S. waters off the coast of Washington in 2021 using catch and length data. Pacific Fisheries Management Council, Portland, Oregon. 111 p. Contents Disclaimer i 1 Introduction 1 1.1 Basic Information . 1 1.2 Life History . 1 1.3 Historical and Current Fishery Information . 2 1.4 Summary of Management History and Performance . 2 2 Data 3 2.1 Fishery-Dependent Data . 3 2.1.1 Commercial Fishery . 3 2.1.2 Recreational / Sport Fishery . 5 2.2 Fishery-Independent Data . 6 2.3 Biological Data . 6 2.3.1 Natural Mortality . 6 2.3.2 Maturation and Fecundity . 7 2.3.3 Length-Weight Relationship . 7 2.3.4 Growth (Length-at-Age) . 8 3 Assessment Model 8 3.1 Summary of Previous Assessments . 8 3.1.1 Bridging Analysis . 8 3.2 Model Structure and Assumptions .
    [Show full text]
  • Summary Report of Freshwater Nonindigenous Aquatic Species in U.S
    Summary Report of Freshwater Nonindigenous Aquatic Species in U.S. Fish and Wildlife Service Region 4—An Update April 2013 Prepared by: Pam L. Fuller, Amy J. Benson, and Matthew J. Cannister U.S. Geological Survey Southeast Ecological Science Center Gainesville, Florida Prepared for: U.S. Fish and Wildlife Service Southeast Region Atlanta, Georgia Cover Photos: Silver Carp, Hypophthalmichthys molitrix – Auburn University Giant Applesnail, Pomacea maculata – David Knott Straightedge Crayfish, Procambarus hayi – U.S. Forest Service i Table of Contents Table of Contents ...................................................................................................................................... ii List of Figures ............................................................................................................................................ v List of Tables ............................................................................................................................................ vi INTRODUCTION ............................................................................................................................................. 1 Overview of Region 4 Introductions Since 2000 ....................................................................................... 1 Format of Species Accounts ...................................................................................................................... 2 Explanation of Maps ................................................................................................................................
    [Show full text]
  • A Checklist of the Fishes of the Monterey Bay Area Including Elkhorn Slough, the San Lorenzo, Pajaro and Salinas Rivers
    f3/oC-4'( Contributions from the Moss Landing Marine Laboratories No. 26 Technical Publication 72-2 CASUC-MLML-TP-72-02 A CHECKLIST OF THE FISHES OF THE MONTEREY BAY AREA INCLUDING ELKHORN SLOUGH, THE SAN LORENZO, PAJARO AND SALINAS RIVERS by Gary E. Kukowski Sea Grant Research Assistant June 1972 LIBRARY Moss L8ndillg ,\:Jrine Laboratories r. O. Box 223 Moss Landing, Calif. 95039 This study was supported by National Sea Grant Program National Oceanic and Atmospheric Administration United States Department of Commerce - Grant No. 2-35137 to Moss Landing Marine Laboratories of the California State University at Fresno, Hayward, Sacramento, San Francisco, and San Jose Dr. Robert E. Arnal, Coordinator , ·./ "':., - 'I." ~:. 1"-"'00 ~~ ~~ IAbm>~toriesi Technical Publication 72-2: A GI-lliGKL.TST OF THE FISHES OF TtlE MONTEREY my Jl.REA INCLUDING mmORH SLOUGH, THE SAN LCRENZO, PAY-ARO AND SALINAS RIVERS .. 1&let~: Page 14 - A1estria§.·~iligtro1ophua - Stone cockscomb - r-m Page 17 - J:,iparis'W10pus." Ribbon' snailt'ish - HE , ,~ ~Ei 31 - AlectrlQ~iu.e,ctro1OphUfi- 87-B9 . .', . ': ". .' Page 31 - Ceb1diehtlrrs rlolaCewi - 89 , Page 35 - Liparis t!01:f-.e - 89 .Qhange: Page 11 - FmWulns parvipin¢.rl, add: Probable misidentification Page 20 - .BathopWuBt.lemin&, change to: .Mhgghilu§. llemipg+ Page 54 - Ji\mdJ11ui~~ add: Probable. misidentifioation Page 60 - Item. number 67, authOr should be .Hubbs, Clark TABLE OF CONTENTS INTRODUCTION 1 AREA OF COVERAGE 1 METHODS OF LITERATURE SEARCH 2 EXPLANATION OF CHECKLIST 2 ACKNOWLEDGEMENTS 4 TABLE 1
    [Show full text]
  • Examination of Parasite Assemblages in Killifish of the Genus Fundulus Across the Atlantic Coast of the United States and Canada
    Nova Southeastern University NSUWorks HCNSO Student Theses and Dissertations HCNSO Student Work 4-30-2020 Examination of Parasite Assemblages in Killifish of the Genus Fundulus Across the Atlantic Coast of the United States and Canada Derek Garvey Nova Southeastern University Follow this and additional works at: https://nsuworks.nova.edu/occ_stuetd Part of the Marine Biology Commons, and the Oceanography and Atmospheric Sciences and Meteorology Commons Share Feedback About This Item This Thesis has supplementary content. View the full record on NSUWorks here: https://nsuworks.nova.edu/occ_stuetd/532 NSUWorks Citation Derek Garvey. 2020. Examination of Parasite Assemblages in Killifish of the Genus undulusF Across the Atlantic Coast of the United States and Canada. Master's thesis. Nova Southeastern University. Retrieved from NSUWorks, . (532) https://nsuworks.nova.edu/occ_stuetd/532. This Thesis is brought to you by the HCNSO Student Work at NSUWorks. It has been accepted for inclusion in HCNSO Student Theses and Dissertations by an authorized administrator of NSUWorks. For more information, please contact [email protected]. Thesis of Derek Garvey Submitted in Partial Fulfillment of the Requirements for the Degree of Master of Science M.S. Marine Biology Nova Southeastern University Halmos College of Natural Sciences and Oceanography April 2020 Approved: Thesis Committee Major Professor: David W. Kerstetter, Ph.D. Committee Member: Christopher A. Blanar, Ph.D. Committee Member: Elizabeth M. Warburton, Ph.D. This thesis is available at
    [Show full text]
  • Field Guide to the Rockfishes (Scorpaenidae) of Alaska
    Field Guide to the Rockfishes (Scorpaenidae) of Alaska Extracted from: Orr, J. W., M. A. Brown, and D. C. Baker. 2000. Guide to rockfishes (Scorpaenidae) of the genera Sebastes, Sebastolobus, and Adelosebastes of the Northeast Pacific Ocean, second edition. U.S. Dep. Commer., NOAA Tech. Memo. NMFS-AFSC-117, 47 p. U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Marine Fisheries Service Alaska Fisheries Science Center Alaska Groundfish Observer Program 2002 ABSTRACT The rockfishes (family Scorpaenidae) of the northeast Pacific Ocean north of Mexico comprise five genera, three of which are included in this guide: Sebastes, Sebastolobus, and Adelosebastes. Sebastes includes some 100 species worldwide; 33, including one to be described, are presently recognized from Alaskan waters. Sebastolobus (commonly known as the thornyheads) includes only three species worldwide; all three are found in Alaskan waters. The single species of Adelosebastes (the Aleutian scorpionfish, A. latens) is known only from the Aleutian Islands and Emperor Seamounts. Of the three genera treated here, Sebastes poses the most difficulties in identification, both because of the numbers of species and because of their morphological similarity and variability. This guide includes color images of 37 species photographed under natural and electronic flash conditions in the field. Most specimens were photographed immediately after collection. iii CONTENTS Abstract.......................................................................................................
    [Show full text]
  • Localized Depletion of Three Alaska Rockfish Species Dana Hanselman NOAA Fisheries, Alaska Fisheries Science Center, Auke Bay Laboratory, Juneau, Alaska
    Biology, Assessment, and Management of North Pacific Rockfishes 493 Alaska Sea Grant College Program • AK-SG-07-01, 2007 Localized Depletion of Three Alaska Rockfish Species Dana Hanselman NOAA Fisheries, Alaska Fisheries Science Center, Auke Bay Laboratory, Juneau, Alaska Paul Spencer NOAA Fisheries, Alaska Fisheries Science Center, Resource Ecology and Fisheries Management (REFM) Division, Seattle, Washington Kalei Shotwell NOAA Fisheries, Alaska Fisheries Science Center, Auke Bay Laboratory, Juneau, Alaska Rebecca Reuter NOAA Fisheries, Alaska Fisheries Science Center, REFM Division, Seattle, Washington Abstract The distributions of some rockfish species in Alaska are clustered. Their distribution and relatively sedentary movement patterns could make localized depletion of rockfish an ecological or conservation concern. Alaska rockfish have varying and little-known genetic stock structures. Rockfish fishing seasons are short and intense and usually confined to small areas. If allowable catches are set for large management areas, the genetic, age, and size structures of the population could change if the majority of catch is harvested from small concentrated areas. In this study, we analyzed data collected by the North Pacific Observer Program from 1991 to 2004 to assess localized depletion of Pacific ocean perch (Sebastes alutus), northern rockfish S.( polyspinis), and dusky rockfish (S. variabilis). The data were divided into blocks with areas of approxi- mately 10,000 km2 and 5,000 km2 of consistent, intense fishing. We used two different block sizes to consider the size for which localized deple- tion could be detected. For each year, the Leslie depletion estimator was used to determine whether catch-per-unit-effort (CPUE) values in each 494 Hanselman et al.—Three Alaska Rockfish Species block declined as a function of cumulative catch.
    [Show full text]
  • Reproduction and Age Structure of the Plains Killifish Fundulus Zebrinus from Two Tributaries of the Upper Red River, Texas
    Western North American Naturalist 80(2), © 2020, pp. 175–182 Reproduction and age structure of the Plains Killifish Fundulus zebrinus from two tributaries of the upper Red River, Texas DAVID S. RUPPEL1,* AND TIMOTHY H. BONNER1 1Department of Biology/Aquatic Station, Texas State University–San Marcos, San Marcos, TX 78666 ABSTRACT.—Plains Killifish Fundulus zebrinus (subgenus Plancterus) is native to river basins in Oklahoma, New Mexico, and Texas. Original descriptions of Plains Killifish life history information are now applicable to the sister taxon Northern Plains Killifish Fundulus kansae following recognition of the 2 species in 2001. Study objectives were to quantify (1) length of the reproductive season, using the gonadosomatic index and categories of gonadal maturation, (2) batch fecundity, and (3) number of age groups for Plains Killifish taken from 2 rivers within the upper Red River basin of Texas. Reproductive season was from March through September, with the production of multiple batches and a maximum batch of 131 mature oocytes. Plains Killifish were sexually mature at age 1 and had an estimated life span of 2–3 years. Reproductive season, production of multiple batches, and age of Plains Killifish were similar to those reported for Northern Plains Killifish and 2 other closely related subgenera, Wileyichthys and Zygonectes. These simi- larities suggest strong trait conservatism among a monophyletic group of fundulids that inhabit a diversity of fresh- water and saltwater environments in western shallow bays and salt marshes, southwestern arid and prairie streams, and eastern low-gradient streams of North America. RESUMEN.—Los Plain Killifish Fundulus zebrinus (subgénero Plancterus) son peces nativos de las cuencas de los ríos en Oklahoma, Nuevo México y Texas.
    [Show full text]