A5013332436- Marine animal studies overview
- Avian ecology and behavior
- Arctic and Antarctic ice dynamics
- Indigenous Studies and Ecology
- Animal Behavior and Reproduction
- Marine and fisheries research
- Demographic Trends and Gender Preferences
- Ocean Acidification Effects and Responses
- Historical and Cultural Archaeology Studies
- Animal Vocal Communication and Behavior
- RNA and protein synthesis mechanisms
- Ichthyology and Marine Biology
- Archaeology and ancient environmental studies
- Wildlife Ecology and Conservation
- Ecology and biodiversity studies
- Underwater Vehicles and Communication Systems
- Archaeology and Rock Art Studies
- Ship Hydrodynamics and Maneuverability
University of California, Santa Cruz
1978-2025
New Mexico State University
1996
University of New Mexico
1996
The open ocean twilight zone holds most of the global fish biomass but is poorly understood owing to difficulties measuring subsurface ecosystem processes at scale. We demonstrate that a wide-ranging carnivore—the northern elephant seal—can serve as an sentinel for zone. link basin–scale foraging success with oceanographic indices estimate abundance five decades into past, and future. discovered small variation in maternal amplified larger changes offspring body mass enormous first-year...
Lifetime reproductive success of individuals in a natural population provides an estimate Darwinian fitness. We calculated lifetime colony female northern elephant seals (Mirounga angustirostris (Gill, 1866)) by monitoring annual breeding throughout life 7735 weanlings marked individually at Año Nuevo, California, USA, from 1963 to 2005. Great variation was evident three aspects history: (1) 75% the females died before reaching age and produced no pups; (2) nearly half survivors bred for...
Abstract The aim of this study was to extend 40 yr prior demographic work on northern elephant seals ( Mirounga angustirostris ) at Año Nuevo, California, by including the oldest animals. We used a Bayesian mark‐recapture analysis estimate lifelong survival and lifespan cohort 372 weaned pups branded in 1985–1987 resighted until 2008. Annual probability females averaged 86.3%/yr ages 5–16, then declined age 21, female. Male lower, averaging 67.7%/yr from 1 15, male. Northern seal expanding...
Abstract Populations and species are threatened by human pressure, but their fate is variable. Some depleted populations, such as that of the northern elephant seal ( Mirounga angustirostris ), recover rapidly even when surviving population was small. The hunted extensively taken collectors between early 1800s 1892, suffering an extreme bottleneck a consequence. Recovery rapid now there over 200,000 individuals. We sequenced 260 modern 8 historical nuclear genomes to assess impact on...
Variation in reproductive success is the basis of evolution and allows species to respond environment, but only when it based on fixed individual variation that heritable. Several recent studies suggest observed reproduction due chance, not inherent differences. Our aim was quantify versus neutral fitness northern elephant seal ( Mirounga angustirostris (Gill, 1866)) females, including both quality quantity their offspring. Using 44 years observations at Año Nuevo California, we assembled...
Abstract Maternal age can influence reproductive success and offspring fitness, but the timing, magnitude direction of those impacts are not well understood. Evolutionary theory predicts that selection on fertility senescence is stronger than maternal effect senescence, therefore, rate will be faster senescence. We used a 36‐year study northern elephant seals ( Mirounga angustirostris ) to investigate Our dataset included 103,746 sightings 1203 known‐age female seals. hypothesized (maternal...