Causes of Live Strandings of Northern Elephant Seals (Mirounga angustirostris) and Pacific Harbor Seals (Phoca vitulina) Along the Central California Coast, 1992-2001

2005 ◽  
Vol 31 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Kathleen M. Colegrove ◽  
Denise J. Greig ◽  
Frances M. D. Gulland
Keyword(s):  
Phoca Vitulina ◽  
Harbor Seals ◽  
Mirounga Angustirostris ◽  
Elephant Seals ◽  
California Coast ◽  
Central California ◽  
Northern Elephant Seals ◽  
Pacific Harbor Seals

scholarly journals Leptospirosis in Northern Elephant Seals (Mirounga angustirostris) Stranded along the California Coast

2005 ◽  
Vol 41 (2) ◽  
pp. 426-430 ◽  
Author(s):  
Kathleen M. Colegrove ◽  
Linda J. Lowenstine ◽  
Frances M. D. Gulland
Keyword(s):  
Mirounga Angustirostris ◽  
Elephant Seals ◽  
California Coast ◽  
Northern Elephant Seals

scholarly journals Pandemic H1N1 Influenza Isolated from Free-Ranging Northern Elephant Seals in 2010 off the Central California Coast

PLoS ONE ◽  
2013 ◽  
Vol 8 (5) ◽  
pp. e62259 ◽  
Author(s):  
Tracey Goldstein ◽  
Ignacio Mena ◽  
Simon J. Anthony ◽  
Rafael Medina ◽  
Patrick W. Robinson ◽  
...  
Keyword(s):  
H1n1 Influenza ◽  
Pandemic H1n1 ◽  
Elephant Seals ◽  
California Coast ◽  
Central California ◽  
Pandemic H1n1 Influenza ◽  
Northern Elephant Seals ◽  
Free Ranging

CONGENITAL DEFECTS IN NORTHERN ELEPHANT SEALS STRANDED ALONG THE CENTRAL CALIFORNIA COAST

1997 ◽  
Vol 33 (2) ◽  
pp. 220-225 ◽  
Author(s):  
J. G. Trupkiewicz ◽  
F. M. D. Gulland ◽  
L. J. Lowenstine
Keyword(s):  
Congenital Defects ◽  
Elephant Seals ◽  
California Coast ◽  
Central California ◽  
Northern Elephant Seals

Foraging ecology of harbour seals (Phoca vitulina) and Northern elephant seals (Mirounga angustirostris) from Baja California, Mexico: inferences from stable isotopes in pups

2015 ◽  
Vol 96 (4) ◽  
pp. 903-908 ◽  
Author(s):  
Fernando R. Elorriaga-Verplancken ◽  
Laura Morales-Luna ◽  
Gisela Heckel ◽  
Yolanda Schramm
Keyword(s):  
Baja California ◽  
Elephant Seal ◽  
Phoca Vitulina ◽  
Tissue Type ◽  
Mirounga Angustirostris ◽  
Migratory Behaviour ◽  
Elephant Seals ◽  
Harbour Seals ◽  
Hair Samples ◽  
Northern Elephant Seals

Harbour seals (Phoca vitulina) and northern elephant seals (Mirounga angustirostris) are the only phocid species found in Mexico. There is evidence that harbour seals at other latitudes exhibit non-migratory behaviour; however, there is lack of knowledge regarding this species' movements in Mexico. In contrast, elephant seal migrations to high latitudes are documented. In order to analyse this behaviour in harbour seals, hair samples (N = 19) were collected from weaned, or nearly weaned, pups on Natividad Island, Baja California (BC), during the 2013 breeding season (February). Lanugo samples (N = 20) were also collected from elephant seal pups on the San Benito Archipelago (60 km north of Natividad) during the same season, providing information on maternal foraging during the last 4–5 months before sampling. Of the two species, BC harbour seals had higher isotope values, reflecting their non-migratory behaviour. These differences may be due to the depleted base values in the higher latitude foraging areas used by northern elephant seals relative to the areas around Natividad frequented by harbour seals. A lower trophic position by elephant seals was considered but taken as an unlikely explanation for this variation. Bayesian analysis confirmed the distinction, with a low overlap value (0.4) and different isotopic spaces (Phoca: 0.5, Mirounga: 1.6). Building upon previous studies of the trophic ecology of the two phocids that inhabit the region, we provide new information by comparing the two species during the same season using the same tissue type sampled from individuals of similar age classes.

scholarly journals The rise and fall of dialects in northern elephant seals

2018 ◽  
Vol 285 (1892) ◽  
pp. 20182176 ◽  
Author(s):  
Caroline Casey ◽  
Colleen Reichmuth ◽  
Daniel P. Costa ◽  
Burney Le Boeuf
Keyword(s):  
Mammalian Species ◽  
Structural Complexity ◽  
Mirounga Angustirostris ◽  
Geographical Differences ◽  
Migration Patterns ◽  
Elephant Seals ◽  
The North ◽  
Vocal Behaviour ◽  
Northern Elephant Seals ◽  
The North Pacific

Vocal dialects are fundamental to our understanding of the transmission of social behaviours between individuals and populations, however few accounts trace this phenomenon among mammals over time. Northern elephant seals ( Mirounga angustirostris ) provide a rare opportunity to examine the trajectory of dialects in a long-lived mammalian species. Dialects were first documented in the temporal patterns of the stereotyped vocal displays produced by breeding males at four sites in the North Pacific in 1968 and 1969, as the population recovered from extreme exploitation. We evaluated the longevity of these geographical differences by comparing these early recordings to calls recently recorded at these same locations. While the presence of vocal dialects in the original recordings was re-confirmed, geographical differences in vocal behaviour were not found at these breeding rookeries nearly 50 years later. Moreover, the calls of contemporary males displayed more structural complexity after approximately four generations, with substantial between-individual variation and call features not present in the historical data. In the absence of measurable genetic variation in this species—owing to an extreme population bottleneck—a combination of migration patterns and cultural mutation are proposed as factors influencing the fall of dialects and the dramatic increase in call diversity.

The transmission of phocine herpesvirus-1 in rehabilitating and free-ranging Pacific harbor seals (Phoca vitulina) in California

2004 ◽  
Vol 103 (3-4) ◽  
pp. 131-141 ◽  
Author(s):  
Tracey Goldstein ◽  
Jonna A.K. Mazet ◽  
Frances M.D. Gulland ◽  
Teri Rowles ◽  
James T. Harvey ◽  
...  
Keyword(s):  
Phoca Vitulina ◽  
Harbor Seals ◽  
Herpesvirus 1 ◽  
Free Ranging ◽  
Pacific Harbor Seals
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