A5004930143- Marine animal studies overview
- Cephalopods and Marine Biology
- Avian ecology and behavior
- Marine and fisheries research
- Arctic and Antarctic ice dynamics
- Animal Vocal Communication and Behavior
- Wildlife Ecology and Conservation
- Climate Change, Adaptation, Migration
- Coral and Marine Ecosystems Studies
- Marine Bivalve and Aquaculture Studies
- Insect-Plant Interactions and Control
- Maritime Navigation and Safety
- Ocean Acidification Effects and Responses
- Ship Hydrodynamics and Maneuverability
- Isotope Analysis in Ecology
- Wildlife-Road Interactions and Conservation
- Ichthyology and Marine Biology
- Plant and animal studies
- Sustainability and Climate Change Governance
- Cultural History and Identity Formation
- Cryospheric studies and observations
- Human-Animal Interaction Studies
- Marine and coastal plant biology
- Toxoplasma gondii Research Studies
- Maritime and Coastal Archaeology
Bear Valley
2008-2025
National Park Service
1999-2022
University of California, Berkeley
2016
Berkeley College
2016
University of California, Santa Cruz
2012-2015
Queen Mary University of London
2014
San Francisco State University
2005
California Department of Transportation
2005
Point Blue Conservation Science
1985-1993
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...
Summary Agricultural intensification has led to the removal of semi‐wild, perennial vegetation in agricultural landscapes. However, short‐cycle crops, frequent disturbance from insecticides, harvesting and tillage disrupts establishment resident communities natural enemies pests. Semi‐wild may provide critical habitat for mobile arthropods supporting ecosystem services sustainable agriculture. We sampled tachinid parasitoids, an important taxon biological control vegetable pests, 35 organic...
Terrestrial carnivores hunt marine mammals along many coastlines around the world, yet dynamics of these predator–prey relationships are rarely well characterized (Griffin et al., 2023; Stander, 2019; Way & Horton, 2004). Among mammals, pinnipeds (i.e., seals and sea lions) may be particularly vulnerable to land-based predators when they aggregate onshore rest, give birth, nurse, breed, molt, avoid predators, thermoregulate (Catenazzi Donnelly, 2008; Nordstrom, 2002). Many pinniped species...
A bstract We investigated effects of marine climate variability on pinniped populations and assessed the initial stages recovery following implementation U. S. Marine Mammal Protection Act (MMPA) based long‐term (1973‐1997) population surveys at South Farallon Islands Point Reyes Peninsula, central California. California sea lions increased over study period, with peak numbers observed during after major El Niño events. The rate increase for appears to have decreased in recent years. Steller...
SUMMARY Cross-disciplinary research is advocated as a way of improving understanding the complexity environmental problems; cross-disciplinary projects, centres and academic institutes have increased. However, there confusion over nature research. Through review papers defining themselves that aim to address conservation problems, by standardizing definition research, it possible evaluate potential impact on peers practitioners. When were reclassified authors, those transdisciplinary...
We investigated temporal and spatial variation in the diet of Common Murre Uria aalge, most abundant, locally breeding seabird central California continental shelf. collected murres coastal, mid-shelf, outer-shelf waters Gulf Farallones during murres' pre-breeding (March-April), (May-August), wintering (September-February) periods, 1985-1988. Diet samples formed persistent groups as a function these six spatio-temporal combinations murre foraging habitat life-history periods. Temporally,...
Abstract Quantifying the dispersion and habitats of far‐ranging seabirds, turtles, cetaceans is essential to assess whether zoning strategies can help protect upper‐trophic marine predators. In this paper, we focus on Black‐footed Albatross ( Phoebastria nigripes ) use three US national sanctuaries off central California: Cordell Bank, Gulf Farallones, Monterey Bay. We assessed significance these protected areas albatrosses by: (i) documenting commuting flights between Hawaiian breeding...
An expanding body of research indicates that exposure to contaminants may impact marine mammal health, thus possibly contributing population declines. The harbor seal the San Francisco Bay (SFB), California, has suffered habitat loss and degradation, including decades environmental contamination. To explore possibility contaminant-induced health alterations in this population, blood levels polychlorinated biphenyls (PCBs), dichlorodiphenyldichloroethylene (DDE), polybrominated diphenyl...
Assessing the relative importance of environmental and anthropogenic influences on distribution wild populations is an important step in designing spatially explicit plans for their management protection. We examined variables correlated with spatial eastern Pacific harbor seals (Phoca vitulina richardii), a marine mammal common to coastal waters, large, highly urbanized estuary. assessed relationship between prey abundance, depth, bottom relief, proximity terrestrial haul-out sites 3...
Abstract California’s central coast differs from many agricultural areas in the U.S., which feature large tracts of monoculture production fields and relatively simple landscapes. Known as nations salad bowl, producing up to 90% U.S. lettuces, broccoli Brussels sprouts, this region is a mosaic fresh vegetable fields, coastal meadow, chaparral shrubs, riparian woodland habitat. We tested for relationships between percent cover crops, other natural landscape vegetation species richness...
Abstract Shellfish mariculture is increasing worldwide and often occurs adjacent to marine mammal breeding feeding habitat. To better understand pinniped vulnerability potential shellfish disturbance displacement effects in a US National Park, mechanisms were explored that may affect the proportion of harbour seals ( Phoca vitulina ) selecting high quality haul‐out sites near aquaculture within large colony, overall seal utilization colony relation other regional colonies. Seal isolated from...
Abstract Rapid development of foraging ability is critical for phocids. In northern elephant seals Mirounga angustirostris , juvenile survivorship low compared with adults and difficulties are potentially associated increased mortality. At Año Nuevo, California, behavior nine females during their third migration five on fourth were documented using a variety commercially available custom time depth recorders. Foraging success, diving ability, at depth, bouts body composition changes between...
ABSTRACT Northern elephant seals ( Mirounga angustirostris ) historically experienced a significant population decrease to the brink of extinction owing human exploitation, but have since recovered and recolonized former breeding/haul‐out sites. Point Reyes Peninsula, California, is one location where increase has resulted in colony expansion. Initial models identified suitable breeding haul‐outs suggested that disturbance, geomorphology, mean wave height, slope were important explanatory...
Abstract Resource managers face mounting challenges when it comes to the implementation of climate change adaptation strategies. Novel strategies, such as managed relocation, frequently entail embracing substantial risk unintended harm focal ecosystems, in an effort alleviate serious threats biological diversity (e.g. extinction). Assessing ecological risks associated with different strategies is consistently called for, but process for doing so often undefined. Here, we describe a...
Our aim was to develop a method for estimating the number of animals using single site in an asynchronous species, meaning that not all are present at once so no one count captures entire population. This is common problem seasonal breeders, and northern elephant seals, we have model quantifying asynchrony Año Nuevo colony. Here test several additional colonies having many years observations demonstrate how it can account on any day. leads correction factors yield total population from...
Abstract Harbor seal ( Phoca vitulina ) haul‐out site use may be affected by natural or anthropogenic factors. Here, we an 11‐yr (1997–2007) study of a colony located near mariculture operation in Drakes Estero, California, to test for (El Niño‐Southern Oscillation (ENSO), density‐dependence, long‐term trends) and (disturbance displacement related oyster production activities) factors that influence the subsites. Annual disturbance rates increased significantly with increases harvest r s =...