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Jaime Jahncke
Point Blue Conservation Science
OceanographyEcologySeabirdFisheryBiology
55Publications
12H-index
535Citations
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Publications 61
Newest
#1Michael E. Johns (UAF: University of Alaska Fairbanks)H-Index: 1
#2Pete Warzybok (Point Blue Conservation Science)H-Index: 9
Last. Greg A. Breed (UAF: University of Alaska Fairbanks)H-Index: 21
view all 5 authors...
Reduced prey abundance and severe weather can lead to a greater risk of mortality for seabirds during the non-breeding winter months. Resource patterns in some regions are shifting and becoming more variable in relation to past conditions, potentially further impacting survival and carryover to the breeding season. As animal tracking technologies and methods to analyze movement data have advanced, it has become increasingly feasible to draw fine-scale inference about how environmental variation ...
Source
#1Dan P. Robinette (Point Blue Conservation Science)H-Index: 3
#2Nadav Nur (Point Blue Conservation Science)H-Index: 31
Last. Jaime Jahncke (Point Blue Conservation Science)H-Index: 12
view all 3 authors...
#1John F. Piatt (USGS: United States Geological Survey)H-Index: 46
#2Julia K. Parrish (UW: University of Washington)H-Index: 30
Last. William J. SydemanH-Index: 49
view all 23 authors...
About 62,000 dead or dying common murres (Uria aalge), the trophically dominant fish-eating seabird of the North Pacific, washed ashore between summer 2015 and spring 2016 on beaches from California to Alaska. Most birds were severely emaciated and, so far, no evidence for anything other than starvation was found to explain this mass mortality. Three-quarters of murres were found in the Gulf of Alaska and the remainder along the West Coast. Studies show that only a fraction of birds that die at ...
3 CitationsSource
#1Susan Cockerham (SJSU: San Jose State University)
#2Becky Lee (SJSU: San Jose State University)
Last. Scott A. Shaffer (SJSU: San Jose State University)H-Index: 52
view all 11 authors...
Avian species host diverse communities of microorganisms which have important roles in the life of birds, including increased metabolism, protection from disease, and immune system development. Along with high human populations and a diversity of human uses of coastal zones, anthropogenic food sources are becoming increasingly available to some species, including gulls. Anthropogenic associations increase the likelihood of encountering foreign or pathogenic bacteria. Diseases in birds caused by ...
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#1Nadav Nur (Point Blue Conservation Science)H-Index: 31
#2Russell W. Bradley (Point Blue Conservation Science)H-Index: 15
Last. Jaime Jahncke (Point Blue Conservation Science)H-Index: 12
view all 5 authors...
Source
#1Michael Valainis (SJSU: San Jose State University)H-Index: 1
#2Tim Andriese (SJSU: San Jose State University)
Last. Jeffrey Y. Honda (SJSU: San Jose State University)H-Index: 4
view all 5 authors...
Farallonophilus cavernicolus (Rentz, 1972) is a member of the family Rhaphidophoridae (camel crickets) endemic to the Farallon Islands. Rentz (1972) hypothesized that F. cavernicolus had characteristics between those of the genera Pristoceuthophilus Rehn, 1903 and Ceuthophilus Scudder, 1862 but closest to the genus Pristoceuthophilus. Currently Pristoceuthophilus is placed in the tribe Pristoceuthophilini and Ceuthophilus in the tribe Ceuthophilini. Farallonophilus cavernicolus is currently plac...
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#1Michael W. Thayne (University of Akureyri)
#2Jarrod A. Santora (UCSC: University of California, Santa Cruz)H-Index: 17
Last. Jaime Jahncke (Point Blue Conservation Science)H-Index: 12
view all 5 authors...
Abstract The abundance and distribution of Northern anchovy (Engraulis mordax) and young of the year (YOY) rockfish (Sebastes spp.) are critical for the survival and reproduction of seabirds, mammals, and predatory fish within the California Current Ecosystem. Traditional detection and quantification of forage fish by trawling can be time consuming and expensive, and may not provide the spatio-temporal resolution needed to examine ecological relationships in quickly-changing marine environments....
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#1Michael Valainis (SJSU: San Jose State University)H-Index: 1
#2Bret Robinson (SJSU: San Jose State University)H-Index: 1
Last. Jeffrey Y. Honda (SJSU: San Jose State University)H-Index: 4
view all 6 authors...
We provide distribution and abundance information for Farallonophilus cavernicolusRentz, 1972, the Farallon camel cricket, and other commonly encountered ground dwelling arthropods (the tenebrionid beetles Coniontis sp. and Eleodes parvicollis Eschscholtz, 1829, Isopoda, and Microcoryphia) recorded during visits to the Southeast Farallon Island (SEFI) from 2013 through 2015. We found cricket populations in six caves and rock crevices, which were mapped and surveyed. One cave accounted for the gr...
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#1Derek E. Lee (PSU: Pennsylvania State University)H-Index: 14
#2Ryan W. Berger (Point Blue Conservation Science)H-Index: 1
Last. Jaime Jahncke (Point Blue Conservation Science)H-Index: 12
view all 8 authors...
Understanding the colonization or recolonization of breeding sites used by colonial animals is fundamental to metapopulation theory and has practical applications in conservation biology. Historically, pinniped species were heavily exploited worldwide, resulting in some breeding colonies becoming extirpated. As populations recover, some abandoned sites may be recolonized or new sites can be colonized. We analyzed aerial and ground survey data on pup counts from 3 islands (South Farallon, San Mig...
Source
#1Pete Warzybok (Point Blue Conservation Science)H-Index: 9
#2Jarrod A. Santora (UCSC: University of California, Santa Cruz)H-Index: 17
Last. Jaime Jahncke (Point Blue Conservation Science)H-Index: 12
view all 12 authors...
Abstract Effective ecosystem-based fishery management involves assessment of foraging interactions among consumers, including upper level predators such as marine birds and humans. Of particular value is information on predator energetic and consumption demands and how they vary in response to the often volatile dynamics of forage populations, as well as the factors that affect forage availability and potential prey switching. We examined the prey requirements of common murre ( Uria aalge ), Bra...
4 CitationsSource
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