A5060412365- Marine animal studies overview
- Marine and coastal plant biology
- Underwater Acoustics Research
- Arctic and Antarctic ice dynamics
- Animal Vocal Communication and Behavior
- Cephalopods and Marine Biology
- Marine and fisheries research
- Mercury impact and mitigation studies
- Avian ecology and behavior
- Ocean Acidification Effects and Responses
- Genetic diversity and population structure
- Marine Bivalve and Aquaculture Studies
- Ichthyology and Marine Biology
- Microplastics and Plastic Pollution
- Isotope Analysis in Ecology
- Toxic Organic Pollutants Impact
- Maritime Navigation and Safety
- Turtle Biology and Conservation
- Coral and Marine Ecosystems Studies
- Environmental Toxicology and Ecotoxicology
- Indigenous Studies and Ecology
- Underwater Vehicles and Communication Systems
- Fish Ecology and Management Studies
- Molecular Biology Techniques and Applications
- Effects and risks of endocrine disrupting chemicals
Universidad Autónoma de Baja California Sur
2015-2024
Universidad Autónoma de Baja California
2009-2023
Laguna Research
2020-2022
NOAA National Marine Fisheries Service Southwest Fisheries Science Center
2002
NOAA National Marine Fisheries Service
2002
Johannes Gutenberg University Mainz
1995
Universidad Nacional Autónoma de México
1987
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 494:291-306 (2013) - DOI: https://doi.org/10.3354/meps10508 Strong maternal fidelity and natal philopatry shape genetic structure in North Pacific humpback whales C. Scott Baker1,*, Debbie Steel1, John Calambokidis2, Erin Falcone2, Ursula González-Peral3, Jay Barlow4, Alexander M. Burdin5, Phillip J....
Abstract The genetic structure of humpback whale populations and subpopulation divisions is described by restriction fragment length analysis the mitochondrial (mt) DNA from samples 230 whales collected biopsy darting in 11 seasonal habitats representing six subpopulations, or ‘stocks’, world‐wide. hierarchical mtDNA haplotype diversity among population subdivisions using molecular variance (AMOVA) procedure, gene identity, genealogical relationship haplotypes as constructed parsimony...
Abstract We estimated the abundance of humpback whales in North Pacific by capture‐recapture methods using over 18,000 fluke identification photographs collected 2004–2006. Our best estimate was 21,808 (CV = 0.04). biases this value a simulation model. Births and deaths, which violate assumption closed population, resulted bias +5.2%, exclusion calves samples −10.5%, failure to achieve random geographic sampling −0.4%, missed matches +9.3%. Known sex‐biased favoring males breeding areas did...
The eastern North Pacific gray whale Eschrichtius robustus experienced an unusual mortality event (UME) in 2019-2020, with 384 whales found dead along the coasts of Mexico, USA and Canada. A similar UME 1999-2000 was speculated to have been caused by starvation, but body condition data were not available test this hypothesis. Between 2017 2019, we used unmanned aerial vehicles (drones) photogrammetry methods measure San Ignacio Lagoon, Baja California Sur, Mexico. Body calculated from...
Climate change is a global phenomenon, yet impacts on resource availability to predators may be spatially and temporally diverse asynchronous. As capital breeders, whales are dependent dense, predictable prey resources during foraging seasons. An Unusual Mortality Event (UME) of Eastern North Pacific (ENP) gray ( Eschrichtius robustus ) was declared in 2019 due dramatic rise stranded animals, many emaciated. have affected the primary grounds ENP (~20,000 individuals) Arctic sub-Arctic region...
Abstract Twentieth century industrial whaling pushed several species to the brink of extinction, with fin whales being most impacted. However, a small, resident population in Gulf California was not targeted by whaling. Here, we analyzed 50 whole-genomes from Eastern North Pacific (ENP) and (GOC) whale populations investigate their demographic history genomic effects natural human-induced bottlenecks. We show that two diverged ~16,000 years ago, after which ENP expanded then suffered 99%...
Suction-cup-attached biologging tags have led to major advances in our understanding of large whale behaviour. Getting close enough a at sea safely attach tag is limiting factor when deploying these systems. Here we present an uncrewed aerial system (UAS)-based tagging technique for free-swimming whales and provide data on efficacy from field testing blue (
ESR Endangered Species Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 18:193-199 (2012) - DOI: https://doi.org/10.3354/esr00447 FEATURE ARTICLE Movements of gray whales between western and eastern North Pacific David W. Weller1,*, Amber Klimek2, Amanda L. Bradford3, John Calambokidis2, Aimee R. Lang1, Brian Gisborne4, Alexander M. Burdin5, Wendy Szaniszlo6, Jorge Urbán7, Alejandro...
Fin whales (Balaenoptera physalus) have a global distribution, but the population inhabiting Gulf of California (GoC) is thought to be geographically and genetically isolated. However, their distribution movements are poorly known. The goal this study was describe fin whale for first time from 11 Argos satellite tags deployed in southwest GoC March 2001. A Bayesian Switching State-Space Model applied obtain improved locations characterize movement behavior as either "area-restricted...
Abstract Three subspecies of fin whales (Balaenoptera physalus) are currently recognized, including the northern whale (B. p. physalus), southern quoyi), and pygmy patachonica). The Northern Hemisphere encompasses in both North Atlantic Pacific oceans. A recent analysis 154 mitogenome sequences from these two ocean basins Southern suggested that populations should be treated as different subspecies. Using sequences, this study, we conduct analyses on a larger mtDNA control region data set,...
ABSTRACT Unoccupied aerial system (UAS) technologies applied to health assessments of large whales can have positive implications for progressive management. We focused on the collection cetacean respiratory blow samples endocrine, DNA profiling, microbial metabarcoding, and metagenomics analyses, with goal improving management whale populations. Blow were collected from humpback ( Megaptera novaeangliae, n = 109 analyzed), blue Balaenoptera musculus, 21 killer Orcinus orca, 1 sample...
The impacts of microplastics on filter feeders megafauna have recently received increased attention. These organisms are potentially exposed to plastic ingestion and the release added/sorbed contaminants during feeding activities. An assessment microplastic abundance chemical impact Phthalates esters (PAEs) were performed in neustonic samples skin biopsies Balaenoptera physalus Rhincodon typus inhabiting Gulf California (Mexico). Sixty-eight percent net tows contained plastics with a maximum...
The sensory mechanisms used by baleen whales (Mysticeti) for locating ephemeral, dense prey patches in vast marine habitats are poorly understood. Baleen have a functional olfactory system with paired rather than single blowholes (nares), potentially enabling stereo-olfaction. Dimethyl sulfide (DMS) is an odorous gas emitted phytoplankton response to grazing zooplankton. Some seabirds use DMS locate prey, but this ability has not been demonstrated whales. For 14 extant species of whale,...
Abstract All humpback whale ( Megaptera novaeangliae ) males in a population sing fundamentally the same version of complex, progressively changing, series sounds at any one time – song. The purpose this study was to describe relationship populations across North Pacific based on song composition. Songs were collected from Philippines, Japan, Hawaii and Mexico 2011, 2012 2013. presence proportion 11 phrase types compared within between investigate similarity change. Results included: shared...
A bstract From observations of the spatial distribution humpback whales in Mexican Pacific between 1981 and 1986, it is possible to recognize four subregions: 1) southern coast Baja California; 2) northern Gulf California, including Midriff Islands; 3) mainland Mexico, Isla Isabel Islas Tres Marias 4) Revillagigedo Archipelago. The seasonal near Archipelago extends from November May similar that other winter breeding grounds, Hawaiian Islands. Along have been observed September April,...
ESR Endangered Species Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 4:247-256 (2008) - DOI: https://doi.org/10.3354/esr00078 Geographic variation in killer whale attacks on humpback whales North Pacific: implications for predation pressure Gretchen H. Steiger1,*, John Calambokidis1, Janice M. Straley2, Louis Herman3, Salvatore Cerchio4,17, Dan R. Salden5, Jorge Urbán-R.6, Jeff K....
Abstract Here, we describe the diving behavior of sperm whales ( Physeter macrocephalus ) using Advanced Dive Behavior ADB tag, which records depth data at 1‐Hz resolution and GPS ‐quality locations for over 1 month, before releasing from whale recovery. A total 27 tags were deployed on in central Gulf California, Mexico, during spring 2007 2008, 10 recovered download. Tracking durations all ranged 0 to 34.5 days (median = 2.3 days), 0.6 26.6 5.0 days) tags. Recovered recorded a median 50.8...
Beginning in December 2018, increased numbers of gray whale ( Eschrichtius robustus ) strandings were reported along the west coast Mexico, United States, and Canada, prompting declaration a Unusual Mortality Event (UME) by States National Marine Fisheries Service. Although declined 2020 2021 from peak 2019, UME is still ongoing as fall 2023. Between 17 2018 31 2021, 503 animals stranded North America, with 226 71 California, 12 Oregon, 56 Washington, 21 British Columbia, 117 Alaska. These...