A5047052431- Marine animal studies overview
- Marine and fisheries research
- Cephalopods and Marine Biology
- Avian ecology and behavior
- Underwater Acoustics Research
- Marine and coastal plant biology
- Aerospace Engineering and Energy Systems
- Wildlife Ecology and Conservation
- Coral and Marine Ecosystems Studies
- Turtle Biology and Conservation
- Genetic and phenotypic traits in livestock
- Human-Animal Interaction Studies
- Fish Ecology and Management Studies
- Genomics and Phylogenetic Studies
- Genetic diversity and population structure
- Ichthyology and Marine Biology
- Isotope Analysis in Ecology
- Mercury impact and mitigation studies
- Marine Bivalve and Aquaculture Studies
- Arctic and Antarctic ice dynamics
- Maritime and Coastal Archaeology
- Maritime Navigation and Safety
- Species Distribution and Climate Change
- Animal Vocal Communication and Behavior
- Indigenous Studies and Ecology
National Marine Mammal Foundation
2024
International Union for Conservation of Nature
2023
International Union for Conservation of Nature (Bangladesh)
2023
The Arctic Eider Society
2023
Center for Scientific Research and Higher Education at Ensenada
2011-2022
Secretariat of Environment and Natural Resources
2016-2022
Durham Technical Community College
2022
National Commission for the Knowledge and Use of Biodiversity
2019
NOAA National Marine Fisheries Service Southwest Fisheries Science Center
1999-2019
NOAA National Marine Fisheries Service
1999-2019
ESR Endangered Species Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 40:285-296 (2019) - DOI: https://doi.org/10.3354/esr00994 Special: Marine vertebrate bycatch: problems and solutions REVIEW Bycatch in gillnet fisheries threatens Critically small cetaceans other aquatic megafauna Robert L. Brownell Jr. 1,*, Randall R. Reeves2, Andrew J. Read3, Brian D. Smith4, Peter O. Thomas5,...
In cases of severe wildlife population decline, a key question is whether recovery efforts will be impeded by genetic factors, such as inbreeding depression. Decades excess mortality from gillnet fishing have driven Mexico's vaquita porpoise (
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 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 vaquita (Phocoena sinus) is a small porpoise endemic to Mexico. It listed by IUCN as Critically Endangered because of unsustainable levels bycatch in gillnets. population has been monitored with passive acoustic detectors every summer from 2011 2018; here we report results for 2017 and 2018. We combine the trends an independent estimate size 2015, visual observations at least seven animals six Despite adoption emergency gillnet ban May estimated rate decline remains extremely high: 48%...
The vaquita (Phocoena sinus) is the world's most endangered marine mammal with approximately 245 individuals remaining in 2008. This species of porpoise endemic to northern Gulf California, Mexico, and historically population has declined because unsustainable bycatch gillnets. An illegal gillnet fishery for an fish, totoaba (Totoaba macdonaldi), recently resurged throughout vaquita's range. secretive but lucrative wildlife trade China swim bladders probably increased mortality by unknown...
Abstract The number of Mexico's endemic porpoise, the vaquita ( Phocoena sinus ), is collapsing primarily due to bycatch in illegal gillnets set for totoaba Totoaba macdonaldi an endangered fish whose swim bladders are exported China. Previous research estimated that vaquitas declined from about 567 245 individuals between 1997 and 2008. Acoustic monitoring 2011 2015 showed a decline 34%/year. Here, we combine visual line transect passive acoustic data collected simultaneously robust spatial...
ESR Endangered Species Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 38:11-27 (2019) - DOI: https://doi.org/10.3354/esr00931 Special: Marine vertebrate bycatch: problems and solutions A field effort capture critically endangered vaquitas Phocoena sinus for protection from entanglement in illegal gillnets L. Rojas-Bracho1, F. M. D. Gulland2,*, C. R. Smith3, B. Taylor4, S. Wells5, P. O....
Abstract The vaquita is the most critically endangered marine mammal, with fewer than 19 remaining in wild. First described 1958, has been rapid decline for more 20 years resulting from inadvertent deaths due to increasing use of large‐mesh gillnets. To understand evolutionary and demographic history vaquita, we used combined long‐read sequencing long‐range scaffolding methods long‐ short‐read RNA generate a near error‐free annotated reference genome assembly cell lines derived female...
To understand the scope and scale of loss biodiversity, tools are required that can be applied in a standardized manner to all species globally, spanning realms from land open ocean. We used data International Union for Conservation Nature Red List provide synthesis conservation status extinction risk cetaceans. One 4 cetacean (26% 92 species) was threatened with (i.e., critically endangered, or vulnerable) 11% were near threatened. Ten percent deficient, we predicted 2-3 these may also The...
ABSTRACT The vaquita Phocoena sinus is a small porpoise that endemic to the northern Gulf of California, Mexico. It most critically endangered marine cetacean in world. precise estimate global abundance based on 1997 survey 567 (95% CI 177–1073). Vaquitas mainly live north 30°45′N and west 114°20′W. Their ‘core area’ consists about 2235 km 2 centred around Rocas Consag, 40 east San Felipe, Baja California. Genetic analyses population simulations suggest has always been rare, its extreme loss...
ESR Endangered Species Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 27:113-118 (2015) - DOI: https://doi.org/10.3354/esr00655 NOTE Key research questions of global importance for cetacean conservation E. C. M. Parsons1,*, S. Baulch2, T. Bechshoft3,4, G. Bellazzi5, P. Bouchet6, A. Cosentino5, J. Godard-Codding7, F. Gulland8, Hoffmann-Kuhnt9, Hoyt10, Livermore11, D. MacLeod12,...
ESR Endangered Species Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 21:77-87 (2013) - DOI: https://doi.org/10.3354/esr00501 Theme Section: Techniques for reducing bycatch of marine mammals in gillnets Vaquitas and gillnets: Mexico's ultimate cetacean conservation challenge Lorenzo Rojas-Bracho1,*, Randall R. Reeves2 1Coordinación de Investigación y Conservación Mamíferos Marinos,...
ESR Endangered Species Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 22:99-114 (2013) - DOI: https://doi.org/10.3354/esr00518 Impacts of fisheries on Critically humpback dolphin Sousa chinensis population in eastern Taiwan Strait Elisabeth Slooten1,*, John Y. Wang2,3, Sarah Z. Dungan2,3, Karin A. Forney4, Samuel K. Hung2,5, Thomas Jefferson6, Kimberly N. Riehl2,3, Lorenzo Rojas‑Bracho7,...
Despite lessons from terrestrial systems, conservation efforts in marine systems continue to focus on identifying priority sites for protection based high species richness inferred range maps. Range maps oversimplify spatial variability animal distributions by assuming uniform distribution within and de facto giving equal weight critical marginal habitats. We used Marxan ver. 2.43 compare richness‐based systematic reserve network solutions using information about mammal relative abundance....
Abstract A line‐transect survey for the critically endangered vaquita, Phocoena sinus , was carried out in October–November 2008, northern Gulf of California, Mexico. Areas with deeper water were sampled visually from a large research vessel, while shallow areas covered by sailboat towing an acoustic array. Total vaquita abundance 2008 estimated to be 245 animals (CV = 73%, 95% CI 68–884). The estimate 57% lower than 1997 estimate, average rate decline 7.6%/yr. Bayesian analyses found 89%...
A bstract line‐transect survey specifically designed to estimate vaquita ( Phocoena sinus ) abundance over its entire range was carried out by three boats in the summer of 1997. There a total 125 sightings groups, mainly due use large 25 ± 150 binoculars, which were seven times more effective detecting vaquitas than hand‐held 7 binoculars. Results confirmed that is restricted northwestern corner Gulf California, Mexico, but boundaries Upper California and Colorado River Delta Biosphere...
Abstract Bycatch in artisanal gill nets threatens the vaquita, Phocoena sinus , with extinction. In 2008 Mexican government announced a conservation action plan for this porpoise, three options protected area closed to net fishing. The probability of success each was estimated Bayesian population model, where defined as an increase vaquita abundance after 10 yr. model fitted data on abundance, bycatch, and fishing effort, although were sparse imprecise. Under first option, existing Refuge...
The vaquita is a critically endangered species of porpoise. It produces echolocation clicks, making it good candidate for passive acoustic monitoring. A systematic grid sensors has been deployed 3 months annually since 2011; results from 2016 are reported here. Statistical models (to compensate non-uniform data loss) show an overall decline in the detection rate between 2015 and 49% (95% credible interval 82% to 8% increase), total 2011 over 90%. Assuming proportional population size,...
A bstract Despite the vaquita being commonly cited as one of most endangered marine mammals in world, there is still disagreement over which factors put species at greatest risk extinction. This lack agreement hinders management decisions needed to reduce species. To expedite decision‐making we consider four major factors. Habitat alteration from reduced flow Colorado River does not currently appear be a factor because productivity remains high habitat. Pollutant loads are low and pose no...