scholarly journals Preliminary Observations of the Effectiveness of Non-Lethal Deterrence Methods for California Sea Lions and Pacific Harbor Seals along the Coast of California

2008 ◽  
Vol 23 ◽  
Author(s):  
Monica , L. DeAngelis ◽  
Doyle , A. Hanan ◽  
Barbara , E. Curry
Keyword(s):  
Harbor Seals ◽  
California Sea Lions ◽  
Sea Lions ◽  
Pacific Harbor Seals

scholarly journals Do marine reserves increase prey for California sea lions and Pacific harbor seals?

PLoS ONE ◽  
2019 ◽  
Vol 14 (6) ◽  
pp. e0218651
Author(s):  
Alejandro Arias-Del-Razo ◽  
Yolanda Schramm ◽  
Gisela Heckel ◽  
Andrea Sáenz-Arroyo ◽  
Arturo Hernández ◽  
...  
Keyword(s):  
Marine Reserves ◽  
Harbor Seals ◽  
California Sea Lions ◽  
Sea Lions ◽  
Pacific Harbor Seals

scholarly journals Low‐frequency hearing in California sea lions and harbor seals

1994 ◽  
Vol 96 (5) ◽  
pp. 3251-3251
Author(s):  
David Kastak ◽  
Ronald J. Schusterman
Keyword(s):  
Low Frequency ◽  
Harbor Seals ◽  
California Sea Lions ◽  
Sea Lions

Prey Items of Harbor Seals and California Sea Lions in Puget Sound, Washington

The Murrelet ◽  
1981 ◽  
Vol 62 (3) ◽  
pp. 83 ◽  
Author(s):  
Robert D. Everitt ◽  
Patrick J. Gearin ◽  
John S. Skidmore ◽  
Robert L. DeLong
Keyword(s):  
Puget Sound ◽  
Harbor Seals ◽  
California Sea Lions ◽  
Sea Lions ◽  
Prey Items

Pinniped splenic volumes

1992 ◽  
Vol 262 (2) ◽  
pp. R322-R325 ◽  
Author(s):  
P. J. Ponganis ◽  
G. L. Kooyman ◽  
D. Sartoris ◽  
P. Jobsis
Keyword(s):  
Body Mass ◽  
Phoca Vitulina ◽  
The State ◽  
Zalophus Californianus ◽  
Harbor Seals ◽  
California Sea Lions ◽  
Axial Tomography ◽  
Splenic Volume ◽  
Sea Lions ◽  
Computerized Axial Tomography

Splenic volume was measured by computerized axial tomography in three harbor seals (Phoca vitulina) and two California sea lions (Zalophus californianus). Volumes ranged from 228 to 679 ml, representing 0.8-3.0% of calculated percentage body mass. Despite possible variation in the state of splenic contraction during the examination, these values are in the upper range of reported mammalian splenic volumes (as % of body mass). This reinforces the pinniped splenic erythrocyte storage concept.

scholarly journals Do Pinnipeds have Personality? Broad Dimensions and Contextual Consistency of Behavior in Harbor Seals (Phoca vitulina) and California Sea Lions (Zalophus californianus).

2017 ◽  
Vol 30 ◽  
Author(s):  
Amber J. de Vere ◽  
Malin K. Lilley ◽  
Lauren Highfill
Keyword(s):  
Marine Mammals ◽  
Bottlenose Dolphins ◽  
Routine Activity ◽  
Personality Factors ◽  
Harbor Seals ◽  
Behavioral Consistency ◽  
California Sea Lions ◽  
Mammal Species ◽  
Individual Level ◽  
Sea Lions

Personality has now been studied in species as diverse as chimpanzees and cuttlefish, but marine mammals remain vastly underrepresented in this area. A broad range of traits have been assessed only once in each of bottlenose dolphins and California sea lions, while consistent individual differences in a few specific behaviors have been identified in grey seals. Furthermore, the context component of definitions of personality is not often assessed, despite evidence that animals may show individual patterns of behavioral consistency across contexts. The current study therefore aimed to use behavioral coding to assess underlying personality factors and consistency across contexts in two marine mammal species: California sea lions and harbor seals. In both species, two personality factors were extracted using exploratory factor analysis. Both were broadly similar across species; the first, Boldness, resembled human Extraversion, and to some extent Openness, with sea lions exhibiting a greater social component. The second factor was labeled Routine Activity, and may contain some Conscientiousness-like traits. Species-specific patterns were also identified for interactive behaviors across two contexts. However, there was substantial individual variation in the frequency of these behaviors, as well as some animals who did not conform to group-level trends. This study therefore provides novel evidence for broad personality factors and both group- and individual-level patterns of contextual consistency in two pinniped species.

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