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The Abundance, Distribution, and Bionomics of the Family Macrouridae in the Norfolk Canyon Area

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The Abundance, Distribution, and Bionomics of the Family Macrouridae in the Norfolk Canyon Area W&M ScholarWorks Dissertations, Theses, and Masters Projects Theses, Dissertations, & Master Projects 1979 The abundance, distribution, and bionomics of the family Macrouridae in the Norfolk Canyon area Robert W. Middleton College of William and Mary - Virginia Institute of Marine Science Follow this and additional works at: https://scholarworks.wm.edu/etd Part of the Marine Biology Commons, and the Oceanography Commons Recommended Citation Middleton, Robert W., "The abundance, distribution, and bionomics of the family Macrouridae in the Norfolk Canyon area" (1979). Dissertations, Theses, and Masters Projects. Paper 1539617486. https://dx.doi.org/doi:10.25773/v5-89x4-hq74 This Thesis is brought to you for free and open access by the Theses, Dissertations, & Master Projects at W&M ScholarWorks. It has been accepted for inclusion in Dissertations, Theses, and Masters Projects by an authorized administrator of W&M ScholarWorks. For more information, please contact [email protected]. THE ABUNDANCE, DISTRIBUTION, AND BIONOMICS OF THE FAMILY MACROURIDAE IN THE NORFOLK CANYON AREA A Thesis Presented to The Faculty of the School of Marine Science The College of William and Mary in Virginia In Partial Fulfillment of the Requirements for the Degree of Master of Arts by Robert W. Middleton 1979 ProQuest Number: 10626236 All rights reserved INFORMATION TO ALL USERS The quality of this reproduction is dependent upon the quality of the copy submitted. In the unlikely event that the author did not send a com plete manuscript and there are missing pages, these will be noted. Also, if material had to be removed, a note will indicate the deletion. uest ProQuest 10626236 Published by ProQuest LLC (2017). Copyright of the Dissertation is held by the Author. All rights reserved. This work is protected against unauthorized copying under Title 17, United States Code Microform Edition © ProQuest LLC. ProQ uest LLC. 789 East Eisenhower Parkway P.O. Box 1346 Ann Arbor, Ml 48106 - 1346 APPROVAL SHEET This thesis is submitted in partial fulfillment the requirements for the degree of MASTER OF ARTS ) 7 -■ / / / /.ui l. /iurkLUU Robert W. Middleton Approved. 61 Jonh A . Musick, Chaqirman Department of Ichthyology Richard L. Wetzel Department of Wetlands Research John V. Merniner Dfepfartment of Ichthyology Gqprge C . Grant Department of Planktology William G. MacIntyre Department of Marine Chemistry TABLE OF CONTENTS Page ACKNOWLEDGEMENTS ................................................. iv LIST OF TABLES ................................................... v LIST OF FIGURES .................................................. vi ABSTRACT .......................................................... ix INTRODUCTION ..................................................... 1 MATERIALS AND METHODS ............................................ 3 ANALYSIS OF MAJOR SPECIES . ..................... ............... 12 Coelorinchus c . carminatus............. 12 Nezumia aequalis ....................... 17 Nezumia bairdii ............................................. 21 Coryphaenoides rupestris ...................... 32 Coryphaeno ides carapinus ............................ 42 Coryphaenoides armatus ..................................... 46 DISTRIBUTION OF MACROURIDS BY TEMPERATURE....................... 51 ABUNDANCE OF THE FAMILY MACROURIDAE ............................. 56 COMPARISONS WITH OTHER STUDIES . .... 65 LITERATURE CITED ................................................. 68 VITA .............................................................. 72 iii ACKNOWLEDGEMENTS Special thanks are given to Dr. Jack Musick for his assistance and support throughout this study. I wish to thank also: Drs. Richard L. Wetzel, John V. Merriner, George C. Grant, and William G. MacIntyre for their critical review of the manuscript. The support, both professional and personal, of the many friends I have made at VIMS is appreciated very much. Finally to Ms. Laura Murray, a thank you is a small payment for an unenviable task. This study was supported by National Science Foundation grants numbers OCE 73-06539 and OCE 76-00729 to J.A. Musick, principal investigator. iv LIST OF TABLES Table Page 1 The coefficient of determination (r^) values for the change in headlength with change in depth regression lines, for Coelorinchus c. carminatus, Nezumia aequalis, Nezumia bairdii, Coryphaenoides rupestris, Coryphaenoides carapinus and Coryphaenoides armatus ................................ ..••• 14 2 The total number and the total biomass of each of the 22 species of macrourids captured in the Norfolk Canyon area ......................................... 67 v LIST OF FIGURES Figure Page 1. Map of the Norfolk Canyon study area. ......... 4 2a. Diagram of the head length measurement................ 6 2b. Diagram of the otolith measurement a x e s .............. 6 3. The log (wt) versus head length regressions for Nezumia bairdii, Coryphaenoides armatus, and Coryphaeno ides rupestris.................... 8 4. Graph of head length versus depth, by cruise, for Coelorinchus CL carminatus. The dot is the mean, the rectangle is the 95% confidence interval, and the lines enclose the range. N = the number of specimens and T = the number of trawls . ................................... 13 5. The distribution of log transfored [log (x+1)] abundance and weight of Coelorinchus CL carminatus at each station, plotted against d e p t h ........................................... 16 6. Graph of head length versus depth, by cruise, for Nezumia aequalis. The dot is the mean, the rectangle is the 95% confidence interval, and the lines enclose the range. N = the number of specimens and T = the number of trawls .... 18 7. The distribution of log transformed [log (x+1)] abundance and weight of Nezumia aequalis at each station, plotted against depth ....... 20 8. Graph of head length versus depth, by cruise, for Nezumia bairdii. The dot is the mean, the rectangle is the range. N = the number of specimens and T = the number of trawls..... 2 2 9. The gonadal maturity stages plotted against head length for Nezumia bairdii.................. 24 10. Head length frequency distribution for Nezumia bairdii by cruise. The number above each cruise indicates the number of specimens........ 2 7 11. The distribution of log transformed [log (x+1)] abundance and weight of Nezumia bairdii at each station plotted against depth .......... 28 vi 12. Graph of head length versus depth, by cruise, for Coryphaenoides rupestris. The dot is the mean, the rectangle is the 95% confidence interval, and the lines enclose the range. N = the number of specimens and T = the number of trawls............................................. 34 13. Diagram of depth plotted against the log transformed [log (x+1)] numerical abundance, by cruise, for Coryphaenoides rupestris......................... 35 14. The gonadal maturity stages plotted against head length for Coryphaenoides rupestris ............ 37 15. The distribution of log transformed [log (x+1)] abundance and weight of Coryphaenoides rupestris at each station, plotted against depth ................................... 41 16. Graph of head length versus depth, by cruise, for Coryphaenoides carapinus. The dot is the mean, the rectangle is the 95% confidence interval, and the lines enclose the range. N = the number of speciemsn and T = the number of trawls................................ 43 17. The distribution of log transformed [log (x+1)] abundance and weight of Corphaenoides carapinus at each station plotted against d e p t h ........................................... 45 18. Graph of head length versus depth, by cruise, for Corphaenoides armatus. The dot is the mean, the rectangle is the 95% confidence interval, and the lines enclose the range. N = the number of specimens and T = the number of trawls........................................... 47 19. The distribution of log transformed [log (x+1)] abundance and weight of Coryphaenoides armatus at each station plotted against d e p t h ............................................. 49 20. The gonadal maturity stages plotted against head length for Coryphaenoides armatus .............. 50 vii The temperature range for each species, by cruise. The dot designates the modal temperature. Ccc. - Coelorinelus C^. carminatus, n.b. - Nezumia bairdii, n.a. - Nesumia aequalis, c.r. - Coryphaenoides rupestris, c.c. - Coryphaenoides carapinus, c.a. - Coryphaenoides armatus. .................. 53 Composite graph of the temperature range of each species for all four cruises. The dot designates the modal temperature. Ccc. - Coelorinelus C. carminatus, n.b. - Nezumia bairdii, n.a. - Nezumia aequalis, c.r. - Coryphaenoides rupestris, c.c. - Coryphaenoides carapinus, c.a. - Coryphaenoides armatus .................. 54 Minimum and maximum depth of capture, with minimum, maximum, and modal temperatures of capture for each species and each cruise. .................. 55 Depth versus relative abundance (as percent, by number, of total capture) for the family Macrouridae, by individual cruise .... ...................... 57 Depth versus relative abundance (as percent, by biomass, of total capture) for the family Macrouridae, by individual cruise .......... .................. 58 Depth versus the log transformed [log (x+1)] numerical abundance for each species capture during the January 76-01 cruise. .................... 60 Depth versus the log transformed [log (x+1)] numerical abundance for each species capture during the June 73-10 cruise • .......... ................ 61 Depth
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