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CONTENTS
In Memoriam
Acknowledgments
Introduction
References Cited
Stock Assessments for 1996
List of Appendices
List of Stock Assessments for All Years

NOAA Technical Memorandum NMFS-NE-114

U.S. Atlantic and Gulf of Mexico Marine Mammal Stock Assessments -- 1996

Gordon T. Waring1, Debra L. Palka1, Keith D. Mullin2, James H.W. Hain1, Larry J. Hansen3, and Kathryn D. Bisack1
1National Marine Fisheries Serv., Woods Hole Lab., 166 Water St., Woods Hole, MA  02543
2National Marine Fisheries Service, 3209 Frederic St., Pascagoula, MS 39567-4112
3
National Marine Fisheries Service, 219 Ft. Johnson Rd., Charleston, SC 29412

Web version posted September 25, 2002

Citation: Waring GT, Palka DL, Mullin KD, Hain JHW, Hansen LJ, Bisack KD. 1997. U.S. Atlantic and Gulf of Mexico Marine Mammal Stock Assessments -- 1996. US Dep Commer, NOAA Tech Memo NMFS NE 114; 251 p.

Information Quality Act Compliance: In accordance with section 515 of Public Law 106-554, the Northeast Fisheries Science Center completed both technical and policy reviews for this report. These predissemination reviews are on file at the NEFSC Editorial Office.

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INTRODUCTION

Section 117 of the 1994 amendments to the Marine Mammal Protection Act (MMPA) requires that an annual stock assessment report (SAR) for each stock of marine mammals that occurs in waters under U.S. jurisdiction, be prepared by the National Marine Fisheries Service (NMFS) and the U.S. Fish and Wildlife Service (FWS), in consultation with regional Scientific Review Groups (SRG). The SRGs are a broad representation of marine mammal and fishery scientists and members of the commercial fishing industry mandated to review the marine mammal stock assessments and provide advice to the Assistant Administrator for NMFS. The reports are then made available on the Federal Register for public review and comment before final publication.

The MMPA requires that each SAR contain several items, including: (1) a description of the stock, including its geographic range; (2) a minimum population estimate, a maximum net productivity rate, and a description of current population trend, including a description of the information upon which these are based; (3) an estimate of the annual human caused mortality and serious injury of the stock, and, for a strategic stock, other factors that may be causing a decline or impeding recovery of the stock, including effects on marine mammal habitat and prey; (4) a description of the commercial fisheries that interact with the stock, including the estimated number of vessels actively participating in the fishery and the level of incidental mortality and serious injury of the stock by each fishery on an annual basis; (5) a statement categorizing the stock as strategic or not, and why; and (6) an estimate of the potential biological removal (PBR) level for the stock, describing the information used to calculate it. The MMPA also requires that SARs be updated annually for stocks which are specified as strategic stocks, or for which significant new information is available, and once every three years for nonstrategic stocks.

Following enactment of the 1994 amendments, the NMFS and FWS held a series of workshops to develop guidelines for preparing the SARs. The first set of stock assessments for the Atlantic Coast (including the Gulf of Mexico) were published in July 1995 in the NOAA Technical Memorandum series (Blaylock et al. 1995). In April 1996, the NMFS held a workshop to review proposed additions and revisions to the guidelines for preparing SARs (Wade and Angliss 1997). Guidelines developed at the workshop were followed in preparing the 1996 SARs.

In this document, major revisions and updating of the SARs were only completed for strategic stocks. These are identified by the 1997 date-stamp at the top right corner at the beginning of each report. Except for some minor editorial changes, stocks designated by the 1995 date-stamp are unchanged from the 1995 document (Blaylock et al. 1995).


Stock
NOTE: All associated documents are in PDF format
NORTH ATLANTIC RIGHT WHALE (Eubalaena glacialis): Western North Atlantic Stock
HUMPBACK WHALE (Megaptera novaeangliae): Western North Atlantic Stock
FIN WHALE (Balaenoptera physalus): Western North Atlantic Stock
SEI WHALE (Balaenoptera borealis): Western North Atlantic Stock
MINKE WHALE (Balaenoptera acutorostrata): Canadian East Coast Stock
BLUE WHALE (Balaenoptera musculus): Western North Atlantic Stock
SPERM WHALE (Physeter macrocephalus): Western North Atlantic Stock
DWARF SPERM WHALE (Kogia simus): Western North Atlantic Stock
PYGMY SPERM WHALE (Kogia breviceps): Western North Atlantic Stock
KILLER WHALE (Orcinus orca): Western North Atlantic Stock
PYGMY KILLER WHALE (Feresa attenuata): Western North Atlantic Stock
NORTHERN BOTTLENOSE WHALE (Hyperoodon ampullatus): Western North Atlantic Stock
CUVIER'S BEAKED WHALE (Ziphius cavirostris): Western North Atlantic Stock
MESOPLODONT BEAKED WHALES (Mesoplodon spp.): Western North Atlantic Stock
RISSO'S DOLPHIN (Grampus griseus): Western North Atlantic Stock
LONG-FINNED PILOT WHALE (Globicephala melas): Western North Atlantic Stock
SHORT-FINNED PILOT WHALE (Globicephala macrorhynchus): Western North Atlantic Stock
WHITE-SIDED DOLPHIN (Lagenorhynchus acutus): Western North Atlantic Stock
WHITE-BEAKED DOLPHIN (Lagenorhynchus albirostris): Western North Atlantic Stock
COMMON DOLPHIN (Delphinus delphis): Western North Atlantic Stock
ATLANTIC SPOTTED DOLPHIN (Stenella frontalis): Western North Atlantic Stock
PANTROPICAL SPOTTED DOLPHIN (Stenella attenuata): Western North Atlantic Stock
STRIPED DOLPHIN (Stenella coeruleoalba): Western North Atlantic Stock
SPINNER DOLPHIN (Stenella longirostris): Western North Atlantic Stock
BOTTLENOSE DOLPHIN (Tursiops truncatus): Western North Atlantic Offshore Stock
BOTTLENOSE DOLPHIN (Tursiops truncatus): Western North Atlantic Coastal Stock
HARBOR PORPOISE (Phocoena phocoena): Gulf of Maine/Bay of Fundy Stock
HARBOR SEAL (Phoca vitulina): Western North Atlantic Stock
GRAY SEAL (Halichoerus grypus): Western North Atlantic Stock
HARP SEAL (Phoca groenlandica): Western North Atlantic Stock
HOODED SEAL (Cystophora cristata): Western North Atlantic Stock
SPERM WHALE (Physeter macrocephalus): Northern Gulf of Mexico Stock
BRYDE'S WHALE (Balaenoptera edeni): Northern Gulf of Mexico Stock
CUVIER'S BEAKED WHALE (Ziphius cavirostris): Northern Gulf of Mexico Stock
BLAINVILLE’S BEAKED WHALE (Mesoplodon densirostris): Northern Gulf of Mexico Stock
GERVAIS' BEAKED WHALE (Mesoplodon europaeus): Northern Gulf of Mexico Stock
BOTTLENOSE DOLPHIN (Tursiops truncatus): Gulf of Mexico Outer Continental Shelf Stock
BOTTLENOSE DOLPHIN (Tursiops truncatus): Gulf of Mexico Continental Shelf Edge and Continental Slope Stock
BOTTLENOSE DOLPHIN (Tursiops truncatus): Western Gulf of Mexico Coastal Stock
BOTTLENOSE DOLPHIN (Tursiops truncatus): Northern Gulf of Mexico Coastal Stock
BOTTLENOSE DOLPHIN (Tursiops truncatus): Eastern Gulf of Mexico Coastal Stock
BOTTLENOSE DOLPHIN (Tursiops truncatus): Gulf of Mexico Bay, Sound, and Estuarine Stocks
ATLANTIC SPOTTED DOLPHIN (Stenella frontalis): Northern Gulf of Mexico Stock
PANTROPICAL SPOTTED DOLPHIN (Stenella attenuata): Northern Gulf of Mexico Stock
STRIPED DOLPHIN (Stenella coeruleoalba): Northern Gulf of Mexico Stock
SPINNER DOLPHIN (Stenella longirostris): Northern Gulf of Mexico Stock
ROUGH-TOOTHED DOLPHIN (Steno bredanensis): Northern Gulf of Mexico Stock
CLYMENE DOLPHIN (Stenella clymene): Northern Gulf of Mexico Stock
FRASER'S DOLPHIN (Lagenodelphis hosei): Northern Gulf of Mexico Stock
KILLER WHALE (Orcinus orca): Northern Gulf of Mexico Stock
FALSE KILLER WHALE (Pseudorca crassidens): Northern Gulf of Mexico Stock
PYGMY KILLER WHALE (Feresa attenuata): Northern Gulf of Mexico Stock
DWARF SPERM WHALE (Kogia simus): Northern Gulf of Mexico Stock
PYGMY SPERM WHALE (Kogia breviceps): Northern Gulf of Mexico Stock
MELON-HEADED WHALE (Peponocephala electra): Northern Gulf of Mexico Stock
RISSO'S DOLPHIN (Grampus griseus): Northern Gulf of Mexico Stock
SHORT-FINNED PILOT WHALE (Globicephala macrorhynchus): Northern Gulf of Mexico Stock

APPENDIXES
APPENDIX I. Summary of marine mammal stock assessment reports for stocks of marine mammals that occupy Atlantic and Gulf of Mexico waters under U.S. jurisdiction and are under NMFS jurisdiction
APPENDIX II. Bycatch Estimation Methods


ACKNOWLEDGMENTS

The authors wish to thank and acknowledge Janeen Quintal for her technical assistance throughout the preparation of this report and for the use of her original artwork. The authors also wish to acknowledge contributions by the Northeast Fisheries Science Center Sea Sampling Investigation, and by personnel of the Northeast and Southeast Fisheries Science Centers, listed alphabetically, who assisted in preparing this report: Nancy Friday, Patricia Gerrior, Aleta Hohn, Blair Mase, Daniel Sheehan, and Jim Tobias. Also, we acknowledge advice and comments provided by the Atlantic Scientific Review Group.


REFERENCES CITED

Blaylock, R.A., J.W.Hain, L.J. Hansen, D.L. Palka, and G.T. Waring. 1995. U.S. Atlantic and Gulf of Mexico marine mammal stock assessments. NOAA Tech. Memo. NMFS-SEFSC-363, 211p.

Wade, P. R. and R. P. Angliss. 1997. Guidelines for assessing marine mammal stocks: Report of the GAMMS workshop April 3-5, 1996, Seattle, Washington. NOAA Tech. Memo. NMFS-OPR-12, 93 pp.

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