https://doi.org/10.82144/b74eb2ee https://seamap.env.duke.edu/dataset/1895 https://www.gbif.org/dataset/0c2781fe-8351-4904-95e5-f6309383b8a6 https://obis.org/dataset/75bc9be9-bffc-469b-92c4-5e344d77e0bf Beth Josephson NOAA Fisheries Primary contact elizabeth.josephson@noaa.gov Debi Palka NOAA Northeast Fisheries Science Center Secondary contact dpalka@whsun1.wh.whoi.edu OBIS-SEAMAP Marine Geospatial Ecology Lab, Duke University

A328 LSRC building Durham NC 27708 US

seamap-contact@duke.edu https://seamap.env.duke.edu OBIS-SEAMAP Marine Geospatial Ecology Lab, Duke University

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seamap-contact@duke.edu https://seamap.env.duke.edu distributor Beth Josephson NOAA Fisheries Primary contact elizabeth.josephson@noaa.gov owner Debi Palka NOAA Northeast Fisheries Science Center Secondary contact dpalka@whsun1.wh.whoi.edu originator 2025-07-31 eng Original provider: NOAA Northeast Fisheries Science Center (NEFSC) Dataset credits: NOAA Northeast Fisheries Science Center (NEFSC) Abstract: The 1994 Amendments to the Marine Mammal Protection Act (MMPA) mandates periodic assessments of all cetacean stocks in US waters. To fulfill this mandate for the Gulf of Maine/Bay of Fundy harbor porpoise stock, the National Marine Fisheries Service (NMFS) has conducted line transect abundance surveys during the summers of 1991, 1992, 1995, and 1999 and provided annual estimates of harbor porpoise by-catch from US sink gillnet fisheries. As well, incidental takes of bycatch in the Canadian sink gillnet and herring weir fisheries have also been documented. Abundance estimates increased from 37,000 in 1991 to 74,000 in 1995 (Table 1A; Smith et al. 1993, Palka 1995a, Palka 1996a). By-catch in the US Northeast sink gillnet fishery decreased from 2,900 animals in 1990 to 332 in 1998 (Table 1B; Bravington and Bisack 1996; Bisack 1997; Rossman and Merrick 1999). Harbor porpoise by-catch in the US mid-Atlantic coastal gillnet fisheries varied from a low of 103 in 1995 to a high of 572 in 1997 (Rossman and Merrick 1999). By-catch in the Canadian sink gillnet fishery decreased from 424 in 1993 to 10 in 1998 (Trippel et al. 1996, 1999). By-catch in the Canadian herring weir fishery decreased from 33 observed takes in 1993 to 2 in 1998 (Waring et al. 1999). Study area, field procedures and analysis methods used in the 1999 abundance survey were similar to those used during previous surveys (Smith et al. 1993, Palka 1995a, Palka 1996a). This paper presents a description of the field procedures, analysis methods and results from the 1999 survey and compares the abundance estimates from 1991 to 1999. Occurrence GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type.xml Observation GBIF Dataset Subtype Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_subtype.xml Marine Biology Visual sighting Marine Animal Survey Marine mammals Sea turtles Visual Sighting Aircraft N/A Perpendicular distance to the animal is not publicly available. To the extent possible under law, the publisher has waived all rights to these data and has dedicated them to the Public Domain (CC0 1.0). Users may copy, modify, distribute and use the work, including for commercial purposes, without restriction. https://seamap.env.duke.edu/dataset/1895 Oceans,North Atlantic -70.41 -61.01 45.161 40.866 1999-08-10 1999-08-29 Scientific names are based on the Integrated Taxonomic Information System (ITIS). species Balaenoptera acutorostrata Common minke whale species Balaenoptera physalus Fin whale family Balaenopteridae Rorquals species Caretta caretta Loggerhead sea turtle order Cetacea Cetaceans species Cetorhinus maximus Basking shark family Cheloniidae Sea turtles family Delphinidae Dolphins species Delphinus delphis Short-beaked common dolphin species Dermochelys coriacea Leatherback sea turtle species Globicephala melas Long-finned pilot whale species Grampus griseus Risso's dolphin genus Lagenorhynchus White-beaked dolphins species Megaptera novaeangliae Humpback whale species Mola mola Ocean sunfish species Phoca vitulina Harbor seal species Phocoena phocoena Harbor porpoise genus Tursiops Bottlenose dolphins notPlanned Beth Josephson NOAA Fisheries Primary contact elizabeth.josephson@noaa.gov NA NA NA Beth Josephson owner Debi Palka originator NA zd_1895 2025-07-31T17:27:30-04:00 dataset Josephson, B. and D. Palka. 2019. NEFSC Abundance of the Gulf of Maine and Bay of Fundy Harbor Porpoise Based on Aerial Surveys 1999. Version 1.0.0. Dataset published in OBIS-SEAMAP. https://doi.org/10.82144/b74eb2ee. OBIS-SEAMAP Dataset Page UTF-8 Interactive map https://seamap.env.duke.edu/dataset/1895 FGDC Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/1895/fgdc EML Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/1895/eml OBIS-SEAMAP zd_1895 zd_1895