Acoustic and Visual Monitoring for Marine Mammals at the Southern California Off-Shore Range (SCORE)

2005 ◽  
Author(s):  
John A. Hildebrand
Keyword(s):  
Marine Mammals ◽  
Southern California ◽  
Visual Monitoring

Biological and Behavioral Response Studies of Marine Mammals in Southern California, 2010 (SOCAL-10")"

2011 ◽  
Author(s):  
B. Southall ◽  
J. Calambokidis ◽  
P. Tyack ◽  
D. Moretti ◽  
J. Hildebrand ◽  
...  
Keyword(s):  
Behavioral Response ◽  
Marine Mammals ◽  
Southern California

Acoustic and visual monitoring for marine mammals at Cortez and Tanner Banks

2000 ◽  
Vol 108 (5) ◽  
pp. 2540-2540
Author(s):  
Erin M. Oleson ◽  
John A. Hildebrand ◽  
Mark A. McDonald ◽  
John Calambokidis
Keyword(s):  
Marine Mammals ◽  
Visual Monitoring

Mixed-Species Associations of Marine Mammals in the Southern California Bight, with Emphasis on Risso’s Dolphins (Grampus griseus)

2017 ◽  
Vol 43 (2) ◽  
pp. 177-184
Author(s):  
Cathy E. Bacon ◽  
Mari A. Smultea ◽  
Dagmar Fertl ◽  
Bernd Würsig ◽  
Elizabeth A. Burgess ◽  
...  
Keyword(s):  
Marine Mammals ◽  
Southern California ◽  
Southern California Bight ◽  
Mixed Species ◽  
Grampus Griseus

Marine Mammal Behavioral Response Studies in Southern California: Advances in Technology and Experimental Methods

2012 ◽  
Vol 46 (4) ◽  
pp. 48-59 ◽  
Author(s):  
Brandon L. Southall ◽  
David Moretti ◽  
Bruce Abraham ◽  
John Calambokidis ◽  
Stacy L. DeRuiter ◽  
...  
Keyword(s):  
Sound Source ◽  
Behavioral Response ◽  
Marine Mammals ◽  
Southern California ◽  
Field Experiments ◽  
Field Research ◽  
Marine Animals ◽  
Sound Levels ◽  
Line Array ◽  
Research Problems

AbstractBehavioral response studies (BRS) are increasingly being conducted to better understand basic behavioral patterns in marine animals and how underwater sounds, including from human sources, can affect them. These studies are being enabled and enhanced by advances in both acoustic sensing and transmission technologies. In the design of a 5-year project in southern California (“SOCAL-BRS”), the development of a compact, hand-deployable, ship-powered, 15-element vertical line array sound source enabled a fundamental change in overall project configuration from earlier efforts. The reduced size and power requirements of the sound source, which achieved relatively high output levels and directivity characteristics specified in the experimental design, enabled the use of substantially smaller research vessels. This size reduction favored a decentralization of field effort, with greater emphasis on mobile small boat operations capable of covering large areas to locate and tag marine mammals. These changes in configuration directly contributed to significant increases in tagging focal animals and conducting sound exposure experiments. During field experiments, received sound levels on tagged animals of several different species were within specified target ranges, demonstrating the efficacy of these new solutions to challenging field research problems.

The Dolphin Hunters: A Specialized Prehistoric Maritime Adaptation in the Southern California Channel Islands and Baja California

2000 ◽  
Vol 65 (3) ◽  
pp. 543-566 ◽  
Author(s):  
Judith F. Porcasi ◽  
Harumi Fujita
Keyword(s):  
Optimal Foraging ◽  
Marine Mammals ◽  
Southern California ◽  
Baja California ◽  
Food Resource ◽  
Archaeological Sites ◽  
Channel Islands ◽  
California Channel Islands ◽  
Intensive Use ◽  
Near Shore

Synthesis of faunal collections from several archaeological sites on the three southernmost California Channel Islands and one in the Cape Region of Baja California reveals a distinctive maritime adaptation more heavily reliant on the capture of pelagic dolphins than on near-shore pinnipeds. Previous reports from other Southern California coastal sites suggest that dolphin hunting may have occurred there but to a lesser extent. While these findings may represent localized adaptations to special conditions on these islands and the Cape Region, they call for reassessment of the conventionally held concept that pinnipeds were invariably the primary mammalian food resource for coastal peoples. Evidence of the intensive use of small cetaceans is antithetical to the accepted models of maritime optimal foraging which assume that shore-based or near-shore marine mammals (i.e., pinnipeds) would be the highest-ranked prey because they were readily encountered and captured. While methods of dolphin hunting remain archaeologically invisible, several island cultures in which dolphin were intensively exploited by people using primitive watercraft and little or no weaponry are presented as possible analogs to a prehistoric Southern California dolphin-hunting technique. These findings also indicate that dolphin hunting was probably a cooperative endeavor among various members of the prehistoric community.

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