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  • 1
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    In:  frederick.wenzel@noaa.gov | http://aquaticcommons.org/id/eprint/14533 | 403 | 2014-02-14 21:51:39 | 14533 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: We describe the food habits of the Sowerby’s beaked whale(Mesoplodon bidens) from observations of 10 individuals taken as bycatch in the pelagic drift gillnet fishery for Swordfish (Xiphias gladius) in the western North Atlantic and 1 stranded individual from Kennebunk, Maine. The stomachs of 8 bycaught whales were intact and contained prey. The diet of these 8 whales was dominated by meso- and benthopelagic fishes that composed 98.5% of the prey items found in their stomachs and cephalopods that accounted for only 1.5% of the number of prey. Otoliths and jaws representing at least 31 fish taxa from 15 families were present in the stomach contents. Fishes, primarily from the families Moridae (37.9% of prey), Myctophidae (22.9%), Macrouridae (11.2%), and Phycidae (7.2%), were present in all 8 stomachs. Most prey were from 5 fish taxa: Shortbeard Codling (Laemonema barbatulum) accounted for 35.3% of otoliths, Cocco’s Lanternfish (Lobianchia gemellarii) contributed 12.9%, Marlin-spike (Nezumia bairdii) composed 10.8%, lanternfishes (Lampanyctus spp.) accounted for 8.4%; and Longfin Hake (Phycis chesteri) contributed 6.7%. The mean number of otoliths per stomach was 1196 (range: 327–3452). Most of the fish prey found in the stomachs was quite small, ranging in length from 4.0 to 27.7 cm. We conclude that the Sowerby’s beaked whales that we examined in this study fed on large numbers of relatively small meso- and benthopelagic fishes that are abundant along the slope and shelf break of the western North Atlantic.
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 381-389
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  • 2
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    In:  http://aquaticcommons.org/id/eprint/8971 | 403 | 2012-08-13 15:41:59 | 8971 | United States National Marine Fisheries Service
    Publication Date: 2021-06-30
    Description: We documented depredation by bottlenose dolphins (Tursiops truncatus) in the Florida king mackerel (Scomberomorus cavalla) troll fishery. Between March and June 2003, we conducted 26 interviews of charter and commercial fishermen in Islamorada, Florida, and 23 along Florida’s east coast from Fort Pierce south to Lake Worth Inlet. All fishermen indicated they had observed bottlenose dolphins depredating bait or catch—king mackerel being the species most often taken by dolphins. During on-board observations of depredation between March and June 2003, we found that dolphins took 6% of king mackerel caught by charter fishermen and 20% of fish caught by commercial fishermen. We concluded that depredation by bottlenose dolphin occurs commonly in this fishery and has the potential to incur a significant economic cost to king mackerel fishermen. To address this concern, we conducted preliminary tests of a gear modification designed to reduce depredation in the king mackerel fishery between December 2003 and January 2004. These tests demonstrated that a modification to the outrigger planer will successfully deter bottlenose dolphins from engaging in depredation, without causing a reduction in ca
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 343-349
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  • 3
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    In:  http://aquaticcommons.org/id/eprint/9724 | 403 | 2012-08-15 17:51:41 | 9724 | United States National Marine Fisheries Service
    Publication Date: 2021-07-08
    Description: Estimates of incidental marine mammal, sea turtle, and seabird mortality in the California drift gillnet fisheryfor broadbill swordfish, Xiphias gladius, and common thresher shark, Alopias vulpinus, are summarized for the 7-year period, 1996 to 2002. Fishery observer coverage was 19% over the period (3,369 days observed/17,649 days fished). An experiment to test the effectiveness of acousticpingers on reducing marine mammal entanglements in this fishery began in 1996 and resulted in statistically significant reductions in marine mammal bycatch. The most commonly entangled marine mammal species were the short-beaked common dolphin, Delphinus delphis; California sealion, Zalophus californianus; and northern right whale dolphin, Lissodelphis borealis. Estimated mortality by species (CV and observed mortality in parentheses) from1996 to 2002 is 861 (0.11, 133) short-beaked common dolphins; 553 (0.16, 103) California sea lions; 151 (0.25, 31) northern right whale dolphins; 150 (0.21, 27) northernelephant seals, Mirounga angustirostris; 54 (0.41, 10) long-beaked common dolphins, Delphinus capensis; 44 (0.53, 6) Dall’s porpoise, Phocoenoides dalli; 19 (0.60, 5) Risso’s dolphins, Grampus griseus; 11 (0.71, 2) gray whales, Eschrichtius robustus; 7 (0.83, 2) sperm whales, Physetermacrocephalus; 7 (0.96, 1) short-finned pilot whales, Globicephala macrorhychus; 12 (1.06, 1) minke whales, Balaenoptera acutorostrata; 5 (1.05, 1) fin whales, Balaenoptera physalus; 11 (0.68, 2) unidentified pinnipeds; 33 (0.52, 4) leatherback turtles, Dermochelys coriacea; 18 (0.57, 3) loggerhead turtles, Caretta caretta; 13 (0.73, 3)northern fulmars, Fulmarus glacialis; and 6 (0.86, 2) unidentified birds.
    Keywords: Conservation ; Fisheries ; Management
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 21-30
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  • 4
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    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/717 | 8 | 2011-09-29 21:41:21 | 717 | California Department of Fish and Game
    Publication Date: 2021-07-02
    Description: Nearly 49,000 metric tons (MT) of anchovies were taken during the 1978-79 season, followed by 32,390 MT in 1979-80, 60,678 MT in 1980-81 and 45,150 MT in 1981-82. A total of 14,076 fish was sampled during the four seasons for age, length and sex. The fishery during the four seasons consisted mainly of young-of-the-year and age groups I and II fish. The 1978 and 1979 yr classes comprised the major share of the catch. Seasonal mean lengths varied from 112 mm standard length (SL) in the 1979-80 season to 122 mm SL for the 1981-82 season. Female to male sex ratios ranged from 1.17:l (1978-79 season) to 1.59:l (1979-80 season). (28pp.)
    Keywords: Management ; Fisheries ; Biology ; Northern anchovy ; Engraulis mordax ; California
    Repository Name: AquaDocs
    Type: monograph
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  • 5
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    California Department of Fish and Game Marine Resources Divison | San Diego, CA
    In:  http://aquaticcommons.org/id/eprint/392 | 8 | 2011-09-29 22:08:14 | 392 | California Department of Fish and Game
    Publication Date: 2021-06-29
    Description: The southern California Monitoring and Management Units collectively gathered 803 discrete samples of 7,329 marine finfishes and invertebrates from local commercial fishmarkets or authorized fish transporters in 1993. Nineteen different species were sampled and biological information recorded for future summarization and use in formulating fisheries management strategies and decisions. Increased sampling efforts in 1994 resulted in 801 samples of 14,566 marine finfish and invertebrates representing 44 different species. Fisheries trends and threats to local fishing opportunities were identified. Results of Marine Recreational Fishery Statistics Survey interviews were also incorporated for a more complete overview of species targeted by both the sport and commercial industries. (26pp.)
    Keywords: Management ; Fisheries ; Fisheries ; California
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
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  • 6
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    California Department of Fish and Game, Marine Resources Division | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/113 | 8 | 2011-09-29 22:35:16 | 113 | California Department of Fish and Game
    Publication Date: 2021-06-26
    Description: This report on the status of major southern California marine sport fish species, together with management recommendations, is based on analyses of catch and size composition data, which were collected on board Commercial Passenger Fishing Vessels (CPFV) from 1985 through1987. The project was designed to determine the status of those fishes that support the CPFV industry, and to make management recommendations when deemed necessary.We collected and analyzed data based on random, stratified, on-board sampling of weekday (excluding holidays), open CPFV's on a year-round basis. We sampled 1/2-day, 3/4-day, and full-day type trips at a level of 5%. The survey area extended from below the United States-Mexicanborder to Point Arguello. Catch estimates were extrapolated to include weekday as well as weekend and holiday, open and chartered CPFV's.We sampled 736 CPFV trips in 1985, 650 in 1986, and 631 in 1987. We encountered 180 species of fishes, including 49 species of rockfishes. We performed detailed analyses on 14 non-rockfish species and 12 rockfish species, as well as all fishes as a group and all rockfishes as a group.We found a moderate increase in total catch of combined fish species between this study and one in the mid-1970's, due primarily to sizeable increases in catches of Pacific mackerel, kelp bass, barred sand bass,and barracuda. However, we also found that there has been more than a 50% decline in the CPFV rockfish catches, due primarily to substantial decreases in catches of bocaccio, chilipepper, and olive rockfish. We have recommended that the current 15-rockfish bag limit regulation be reduced to a 10-rockfish bag limit, and that additional and equitable conservation measures also be implemented on the commercial rockfish fishery. (385pp.)
    Keywords: Management ; Fisheries ; sport fisheries ; California
    Repository Name: AquaDocs
    Type: monograph
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  • 7
    Publication Date: 2005-07-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kraus, Scott D -- Brown, Moira W -- Caswell, Hal -- Clark, Christopher W -- Fujiwara, Masami -- Hamilton, Philip K -- Kenney, Robert D -- Knowlton, Amy R -- Landry, Scott -- Mayo, Charles A -- McLellan, William A -- Moore, Michael J -- Nowacek, Douglas P -- Pabst, D Ann -- Read, Andrew J -- Rolland, Rosalind M -- New York, N.Y. -- Science. 2005 Jul 22;309(5734):561-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Edgerton Research Laboratory, New England Aquarium, Boston, MA 02110-3399, USA. skraus@neaq.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16040692" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Atlantic Ocean ; Ecology ; *Ecosystem ; Environment ; Female ; Fisheries ; Male ; Mortality ; Population Dynamics ; Population Growth ; Public Policy ; Reproduction ; Ships ; *Whales/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
    Publication Date: 2018-06-08
    Description: Remote sensing of chlorine monoxide (CIO) by the Microwave Limb Sounder (MLS) experiment aboard the Upper Atmosphere Research Satellite (UARS) has provided global measurements of variations in stratospheric free chlorine (for 1991 to 1997).
    Keywords: Geophysics
    Type: Journal of Geophysical Research
    Format: text
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  • 9
    Publication Date: 2018-06-08
    Description: The evolution of ozone observed by UARS MLS in the Northern Hemisphere polar vortex is shown as a function of time throughout the stratosphere, for the 1991-1992 and 1992-1993 winters.
    Keywords: Geophysics
    Type: American Geophysical Union; Baltimore, MD; United States
    Format: text
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  • 10
    Publication Date: 2018-06-08
    Description: Variations in ozone and chlorine monoxide observed by the Microwave Limb Sounder (MLS) abroad the Upper Atmosphere Research Satellite (UARS) during the first two years of operation are presented. We focus on mid-latitudes, where significant ozone decreases are observed in the lower stratosphere, and we offer some comparisons with other data sets. We will attempt to place the mid-latitude changes in context with changes observed at other latitudes. Possible correlations between the MLS ozone and CIO observations will be discussed.
    Keywords: Geophysics
    Type: American Geophysical Union: Geophysics; San Francisco, CA; United States
    Format: text
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