Accumulation of PAHs and synthetic musk compound in minke whales (Balanoptera acutorostrata) and long-beaked common dolphins (Delphinus capensis) from Korean coastal waters

2012 ◽  
Vol 31 (3) ◽  
pp. 477-485 ◽  
Author(s):  
Hyo-Bang Moon ◽  
Yong-Rock An ◽  
Seok-Gwan Choi ◽  
Minkyu Choi ◽  
Hee-Gu Choi
Keyword(s):  
Coastal Waters ◽  
Synthetic Musk ◽  
Minke Whales ◽  
Common Dolphins ◽  
Delphinus Capensis

Chlorinated and brominated contaminants including PCBs and PBDEs in minke whales and common dolphins from Korean coastal waters

2010 ◽  
Vol 179 (1-3) ◽  
pp. 735-741 ◽  
Author(s):  
Hyo-Bang Moon ◽  
Kurunthachalam Kannan ◽  
Minkyu Choi ◽  
Jun Yu ◽  
Hee-Gu Choi ◽  
...  
Keyword(s):  
Coastal Waters ◽  
Minke Whales ◽  
Common Dolphins

scholarly journals First Records of Long-beaked Common Dolphins, Delphinus capensis, in Canadian Waters

2005 ◽  
Vol 119 (1) ◽  
pp. 110 ◽  
Author(s):  
John K. B. Ford
Keyword(s):  
British Columbia ◽  
Warm Water ◽  
Common Dolphin ◽  
Central California ◽  
Far North ◽  
Common Dolphins ◽  
Delphinus Capensis

The genus Delphinus has recently been determined to be comprised of two species, the Short-beaked Common Dolphin, D. delphis, and the Long-beaked Common Dolphin, D. capensis. D. delphis is regularly observed in eastern Canadian waters, but is known only from a single stranding in British Columbia. Two specimen records and a series of sightings of D. capensis in British Columbian waters during 1993-2003, detailed here, are the first for this species in Canada. D. capensis normally ranges only as far north as central California, and its abundance in those waters increases in association with warm-water oceanographic events. Although the species appears to be rare in British Columbia, future sightings during warm-water periods might be anticipated.

Marine megavertebrates of Cornwall and the Isles of Scilly: relative abundance and distribution

2011 ◽  
Vol 92 (8) ◽  
pp. 1823-1833 ◽  
Author(s):  
Ruth H. Leeney ◽  
Matthew J. Witt ◽  
Annette C. Broderick ◽  
John Buchanan ◽  
Daniel S. Jarvis ◽  
...  
Keyword(s):  
Relative Abundance ◽  
Bottlenose Dolphins ◽  
Marine Biodiversity ◽  
Balaenoptera Acutorostrata ◽  
Delphinus Delphis ◽  
Mola Mola ◽  
Aerial Surveys ◽  
Minke Whales ◽  
Pilot Whales ◽  
Common Dolphins

We document patterns of distribution and relative abundance of marine megavertebrate fauna around Cornwall and the Isles of Scilly from a combination of aerial and boat-based surveying. Between January 2006 and November 2007, 20 aerial surveys were undertaken, comprising over 40 hours of on-effort flying time. In April to October of these years, 27 effort-corrected ferry surveys were also conducted from a passenger ferry travelling between Cornwall and the Isles of Scilly. Opportunistic sightings were also logged by the crew members of the ferry and another vessel travelling regularly along the same route on 155 days. Ten megavertebrate species were sighted: basking sharks Cetorhinus maximus, sunfish Mola mola, common dolphins Delphinus delphis, harbour porpoise Phocoena phocoena, grey seals Halichoerus grypus, Risso's dolphins Grampus griseus, bottlenose dolphins Tursiops truncatus, minke whales Balaenoptera acutorostrata, long-finned pilot whales Globicephala melas and killer whale Orcinus orca. During aerial surveys, 206 sighting events of seven species were made, compared with 145 sighting events of eight species during ferry surveys and 293 sighting events of 10 species from opportunistic ship-board data collection efforts. Seasonal and spatial patterns in species occurrence were evident. Basking sharks were the most commonly-sighted species in the region and were relatively abundant throughout the estimated 5 km-wide strip of coastal waters covered by the aerial surveys, during spring and summer. Ferry surveys and opportunistic vessel-based sightings data confirmed that the distribution of surface-feeding aggregations of this species was largely around the coasts. Despite the limited scope of this study, it has provided valuable baseline data, and possible insights into the marine biodiversity of the region.

Concentrations of trace metals in the tissues of long-beaked common dolphins (Delphinus capensis) in the East Sea, Korea

2011 ◽  
Vol 46 (2) ◽  
pp. 55-62 ◽  
Author(s):  
Seong-Gil Kim ◽  
Seong-Soo Kim ◽  
Hee-Gu Choi ◽  
Yong-Rock An
Keyword(s):  
Trace Metals ◽  
East Sea ◽  
Common Dolphins ◽  
Delphinus Capensis

Seabird and Dolphin Mortality Associated with Underwater Detonation Exercises

2011 ◽  
Vol 45 (6) ◽  
pp. 89-95 ◽  
Author(s):  
Kerri Danil ◽  
Judy A. St. Leger
Keyword(s):  
East Coast ◽  
Military Training ◽  
Population Level ◽  
Mitigation Measures ◽  
Training Activities ◽  
Precautionary Measures ◽  
Training Exercises ◽  
Common Dolphins ◽  
Delphinus Capensis ◽  
Wildlife Mortality

AbstractWe report the details of two wildlife mortality events that were associated with underwater detonations. The detonations occurred as part of military training activities at Silver Strand Training Complex in San Diego, California. In March 2006, an underwater detonation resulted in 70 western grebes (Aechmophorus occidentalis) being killed by subsequent sequential detonations in the same training exercise. Ten of the 70 western grebes impacted were necropsied, verifying cause of death as primary blast injury. In March 2011, a time-delayed underwater detonation resulted in the death of three or possibly four long-beaked common dolphins (Delphinus capensis). While these blast events were unlikely to impact these species on a population level, underwater detonations do have the potential for population-level impacts on wildlife. Both events were accidental mortalities and the first ever documented from Navy underwater detonation training in Hawaii, Southern California, and along the U.S. East Coast. The Navy updated its underwater explosive mitigation measures after each of these mortality events to limit the potential of future mortalities by requiring sequential detonations to occur either less than 5 s or more than 30 min apart and by suspending time-delayed detonation training exercises until more robust precautionary measures can be developed.

scholarly journals The status and trends of small cetacean landings at Dixcove artisanal fishing port, western Ghana

2019 ◽  
Author(s):  
Patrick K Ofori-Danson ◽  
Joseph Debrah ◽  
Koen Van Waerebeek
Keyword(s):  
Coastal Waters ◽  
Bottlenose Dolphins ◽  
Fishing Effort ◽  
Humpback Whales ◽  
Small Scale ◽  
Catch Per Unit Effort ◽  
Western Africa ◽  
Republic Of Benin ◽  
Lagenodelphis Hosei ◽  
Common Dolphins

One of the largest documented takes of small cetaceans in western Africa occurs in Western regional coastal waters of Ghana. This temporally coincided with steadily decreasing catches of finfish, especially small pelagics (sardinellas, anchovies, mackerel) over the past decades, attributed to both climate change and indiscriminate exploitation methods. Dixcove, a key fishing port for cetacean landings was surveyed during 96 days between 12 September -17 December 2018. Our goal was to update insights from our earlier surveys, especially on catch rates, catch per unit effort and species composition. A total of 57 delphinids of 10 species were observed landed: Stenella attenuata (28.1%), Stenella clymene (17.5%), Lagenodelphis hosei (10.5%), Steno bredanensis (10.5%), unidentified stenellids (8.8%), Grampus griseus (3.5%), Delphinus sp. (3.5%), Pseudorca crassidens (3.5%) and single specimens of Tursiops truncatus, Stenella longirostris and Stenella frontalis. The observed cetacean catch per diem (cpd =0.59) at Dixcove was low compared to earlier rates for this port (e.g. cpd =2.82, in 2013-2014). However, fishing effort, measured as the number of canoes landing per diem (range 0-25; mean= 8.82 ± 6.05; n=22) was also reduced. Poor fish catches forced many canoes to remain in port. The prevalence in landings of common bottlenose dolphins and common dolphins has significantly decreased in the period 2000-2018. The prevalence of Fraser's dolphins and false killer whales increased. Indications are that a higher proportion of cetacean carcasses may be utilised offshore as shark bait. Hooks baited with cetacean parts are deployed in auxiliary longlines set longside large-mesh drift gillnets with a shark aggregating purpose, a first report in Africa. Shore-based incidental sightings of humpback whales suggest the potential for small scale whale-watching ecotourism in Ghanaian coastal waters, as pertains in the nearby waters of the Republic of Benin.

scholarly journals Age estimation on long-beaked common dolphins, Delphinus capensis, from the Gulf of California

Therya ◽  
2014 ◽  
Vol 5 (2) ◽  
pp. 449-460
Author(s):  
Juan Pablo Gallo-Reynoso ◽  
Edna O. Francisco ◽  
Charles Leo Ortiz
Keyword(s):  
Age Estimation ◽  
Gulf Of California ◽  
Common Dolphins ◽  
Delphinus Capensis
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