Changes in auditory sensitivity with depth in a free-diving California sea lion (Zalophus californianus)

2002 ◽  
Vol 112 (1) ◽  
pp. 329-333 ◽  
Author(s):  
David Kastak ◽  
Ronald J. Schusterman
Keyword(s):  
Auditory Sensitivity ◽  
Zalophus Californianus ◽  
Sea Lion ◽  
California Sea Lion

Onset, growth, and recovery of in-air temporary threshold shift in a California sea lion (Zalophus californianus)

2007 ◽  
Vol 122 (5) ◽  
pp. 2916 ◽  
Author(s):  
David Kastak ◽  
Colleen Reichmuth ◽  
Marla M. Holt ◽  
Jason Mulsow ◽  
Brandon L. Southall ◽  
...  
Keyword(s):  
Threshold Shift ◽  
Zalophus Californianus ◽  
Temporary Threshold Shift ◽  
Sea Lion ◽  
California Sea Lion

Dental Pathology of the California Sea Lion (Zalophus californianus)

2014 ◽  
Vol 151 (1) ◽  
pp. 113-121 ◽  
Author(s):  
N.L. Sinai ◽  
R.H. Dadaian ◽  
P.H. Kass ◽  
F.J.M. Verstraete
Keyword(s):  
Zalophus Californianus ◽  
Sea Lion ◽  
California Sea Lion ◽  
Dental Pathology

Quantifying errors associated with using fecal samples to determine the diet of the California sea lion (Zalophus californianus)

2001 ◽  
Vol 79 (6) ◽  
pp. 1080-1087 ◽  
Author(s):  
Anthony J Orr ◽  
James T Harvey
Keyword(s):  
Zalophus Californianus ◽  
Correction Factors ◽  
Sea Lion ◽  
California Sea Lions ◽  
California Sea Lion ◽  
Fecal Samples ◽  
Sea Lions ◽  
Mesh Bag ◽  
Estimate Number ◽  
Fish Otoliths

The purpose of this study was to quantify the errors associated with using fecal samples to determine the diet of the California sea lion (Zalophus californianus). Fishes and squids of known size and number were fed to five sea lions held in enclosures with seawater-filled pools. Enclosures were washed and pools were drained periodically so that sea lion feces could be collected using a 0.5 mm mesh bag. Fish otoliths and squid beaks were collected from feces and used to estimate number and size of prey eaten. An average of 50.7% (SE = 6.4%) of 430 fishes and 73.5% (SE = 12.0%) of 49 cephalopods fed to sea lions were represented by otoliths and beaks in feces, respectively. Estimated lengths of fish from feces were less than lengths of fish fed to sea lions by an average of 30.1% (SE = 2.8%). Beaks were not digested significantly; estimated lengths of squid were underestimated by an average of only 3.3% (SE = 1.5%) relative to actual lengths. Passage rates of otoliths varied, but more than 70% were recovered within 48 h after the fish was consumed. Passage rates of beaks were generally less than those of otoliths; six beaks (11%) were collected in feces 4 days after the squid were eaten. Correction factors were created to more reliably estimate the number and size of fishes and cephalopods eaten by California sea lions.

Mental Rotation of Perspective Stimuli in a California Sea Lion (Zalophus californianus)

2003 ◽  
Vol 61 (2) ◽  
pp. 102-112 ◽  
Author(s):  
Kai Petra Stich ◽  
Guido Dehnhardt ◽  
Björn Mauck
Keyword(s):  
Mental Rotation ◽  
Zalophus Californianus ◽  
Sea Lion ◽  
California Sea Lion

scholarly journals Neuroanatomy and Volumes of Brain Structures of a Live California Sea Lion (Zalophus californianus) From Magnetic Resonance Images

2009 ◽  
Vol 292 (10) ◽  
pp. 1523-1547 ◽  
Author(s):  
Eric W. Montie ◽  
Nicola Pussini ◽  
Gerald E. Schneider ◽  
Thomas W.K. Battey ◽  
Sophie Dennison ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Brain Structures ◽  
Magnetic Resonance Images ◽  
Zalophus Californianus ◽  
Sea Lion ◽  
California Sea Lion
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