[MARMAM] Acoustician positions

[Emma Dvorak]

Integrated Statistics is seeking several Acousticians to support the 
National Oceanic and Atmospheric Administration (NOAA) National Marine 
Fisheries Service (NMFS) Northeast Fisheries Science Center (NEFSC). The 
Acousticians will support the Protected Species Branch's Passive 
Acoustic Group, working on projects focused on anthropogenic noise, 
marine mammals, and fishes. The projects typically involve running 
acoustic detectors and analyzing data as well as graphic generation and 
writing up components of the project. Opportunities to participate in 
fieldwork are possible.


*Duties *
The Acousticians participate in one or more of these tasks:

 * Analyze bottom-mounted and mobile passive acoustic data to assess
   the distribution, occurrence, and habitat use of cetacean species
   along the US eastern seaboard using a combination of manual and
   automated detectors.
 * Analyze passive acoustic data to describe marine soundscapes,
   including biological, geological and anthropogenic contributions.
 * Analyze passive acoustic data to describe the occurrence and
   distribution of fishes.
 * Analyze passive acoustic data to describe the occurrence,
   distribution and relative source levels of vessels.
 * Assist with field collection of passive acoustic data as needed.
 * Assist in maintenance of a passive acoustic literature database in
   Endnote.
 * Assist with PSB Passive Acoustic Group webpage content and maintenance.
 * Assist in synthesizing and where applicable present results at
   relevant venues.
 * Assist with education and outreach activities conducted by the
   Passive Acoustic Group.

*Qualifications*
The Acoustician should possess:*
*

 * Undergraduate degree in marine biology or a related biological
   science. A Master's degree in a relevant field is a bonus.
 * Some experience in analyzing acoustic data. Prior experience with
   Raven Pro software is a bonus.
 * Able to participate in fieldwork.
 * Excellent written and oral communications skills.
 * Ability to work collaboratively with a large group and multifaceted
   projects.
 * Basic understanding and prior experience with programming and data
   management is a bonus.

The positions will be full-time for one year, with the possibility of 
extension. They are eligible for the benefits described on the 
Integrated Statistics website. Authorization to work for any employer in 
the USA is required. To apply for this position, go to 
https://jobs.intstats.com/JobDetails.jsp?jobListingId=281 or visit 
www.integratedstatistics.com, click Employment Opportunities, click the 
job name and click the Apply Here link.


Integrated Statistics is an equal opportunity employer and will not 
discriminate against any employee or applicant on the basis of age, 
color, disability, gender, national origin, race, religion, gender 
identity, sexual orientation, veteran status, or any classification 
protected by federal, state, or local law. Consistent with its 
obligations under federal law, Integrated Statistics is committed to 
taking affirmative action to employ and advance in employment qualified 
women, minorities, disabled individuals, special disabled veterans, 
veterans of the Vietnam era, and other eligible veterans. For assistance 
with accessibility of applications, posters, forms, and/or documents, 
please email the Integrated Statistics office.


--
Integrated Statistics, Inc.
16 Sumner Street
Woods Hole, MA 02543
Cell: (508) 648-8308
Office: (508) 540-8560
Fax: (508) 721-6841

___
MARMAM mailing list
MARMAM@lists.uvic.ca
https://lists.uvic.ca/mailman/listinfo/marmam

[MARMAM] Monday's Ocean Talk with Dr. Robin W. Baird

[AIMM Internships]

*Mondays Ocean Talks*

Interview with Dr. Robin W. Baird
14th June, 3 pm (GMT+1) on AIMM YouTube channel

https://youtu.be/YJo4lR7h-7c


Mondays Ocean Talks are a set of recorded interviews between Joana Castro,
the founder of AIMM, and invited guests from all over the world who play an
important role within the ocean and marine life.
The Mondays Ocean Talks were launched in February and every two weeks a new
interview is released. Each interview has a duration of appr. one hour and
presents an informal talk, a sharing of experiences and an exchange of
knowledge. The interviews are completely free to access from AIMM YouTube
channel. Subscribe and meet an Ocean Researcher!

The next interview will be with Dr. Robin W. Baird. You can find out more
information about Dr. Robin W. Baird

https://www.cascadiaresearch.org/robinwbaird




More info: i...@aimmportugal.org

--
AIMM Portugal - Ass. Investigacao do Meio Marinho | Marine Environment
Research Association
Website: www.aimmportugal.org
Facebook: https://www.facebook.com/AIMM.org/
Twitter: https://twitter.com/AIMMPortugal
Instagram: https://www.instagram.com/aimmportugal_org/
Youtube: http://www.youtube.com/c/AimmportugalOrg

-- 

*AIMM Portugal* - Ass. Investigação do Meio Marinho | Marine Environment
Research Association

*Website*: www.aimmportugal.org

[image: AIMM Portugal | facebook]  [image:
AIMM Portugal | twitter]  [image: AIMM
Portugal | instagram]  [image:
AIMM Portugal | youtube] 
___
MARMAM mailing list
MARMAM@lists.uvic.ca
https://lists.uvic.ca/mailman/listinfo/marmam

[MARMAM] New publication: Modelling seasonal distribution of Irrawaddy dolphins (Orcaella brevirostris) in a transnational Important Marine Mammal Area

[Discourse Maps]

New research article available:

Verutes, G. M., Tubbs, S. E., Selmes, N., Clark, D. R., Walker, P., & Clements, 
O. (2021). Modelling seasonal distribution of Irrawaddy dolphins (Orcaella 
brevirostris) in a transnational Important Marine Mammal Area. Frontiers in 
Marine Science, 8, 698. https://doi.org/10.3389/fmars.2021.617921

PDF available at 
https://www.frontiersin.org/articles/10.3389/fmars.2021.617921/full

Abstract
Fishing activities continue to decimate populations of marine mammals, fish, 
and their habitats in the coastal waters of the Kep Archipelago, a cluster of 
tropical islands on the Cambodia-Vietnam border. In 2019, the area was 
recognized as an Important Marine Mammal Area, largely owing to the significant 
presence of Irrawaddy dolphins (Orcaella brevirostris). Understanding habitat 
preferences and distribution aids in the identification of areas to target for 
monitoring and conservation, which is particularly challenging in data-limited 
nations of Southeast Asia. Here, we test the hypothesis that accurate seasonal 
habitat models, relying on environmental data and species occurrences alone, 
can be used to describe the ecological processes governing abundance for the 
resident dolphin population of the Kep Archipelago, Cambodia. Leveraging two 
years of species and oceanographic data-depth, slope, distance to shore and 
rivers, sea surface temperature, and chlorophyll-a concentration-we built 
temporally stratified models to estimate distribution and infer seasonal 
habitat importance. Overall, Irrawaddy dolphins of Kep displayed habitat 
preferences similar to other populations, and were predominately encountered in 
three situations: (1) water depths ranging from 3.0 to 5.3 m, (2) surface water 
temperatures of 27-32C, and (3) in close proximity to offshore islands (< 7.5 
km). With respect to seasonality, statistical tests detected significant 
differences for all environment variables considered except seafloor slope. 
Four predictor sets, each with a unique combination of variables, were used to 
map seasonal variation in dolphin habitat suitability. Models with highest 
variable importance scores were water depth, pre-and during monsoon season 
(61-62%), and sea surface temperature, post-monsoon (71%), which suggests that 
greater freshwater flow during the wet season may alter primary productivity 
and dolphin prey abundance. Importantly, findings show the majority of areas 
with highest habitat suitability are not currently surveyed for dolphins and 
located outside Kep's Marine Fisheries Management Area. This research confirms 
the need to expand monitoring to new areas where high-impact fisheries and 
other human activities operate. Baseline knowledge on dolphin distribution can 
guide regional conservation efforts by taking into account the seasonality of 
the species and support the design of tailored management strategies that 
address transboundary threats to an Important Marine Mammal Area.

This work builds on the Irrawaddy dolphin habitat models for the Kien Giang 
Biosphere Reserve/Kep Archipelago border region previously mapped by:

  *   Verutes, Gregory M., et al. "Using GIS and stakeholder involvement to 
innovate marine mammal bycatch risk assessment in data-limited fisheries." PloS 
one 15.8 (2020): e0237835.
  *   Hines, Ellen, et al. "Getting to the bottom of bycatch: a GIS-based 
toolbox to assess the risk of marine mammal bycatch." Endangered Species 
Research 42 (2020): 37-57.

Regards,
Gregg
___
MARMAM mailing list
MARMAM@lists.uvic.ca
https://lists.uvic.ca/mailman/listinfo/marmam

[MARMAM] New paper

[Susanna Blackwell]

Hello all,
My co-authors and I are pleased to announce the publication of our paper on
cue rates (calling rates) in migrating bowhead whales:

Blackwell SB, AM Thode, AS Conrad, MC Ferguson, CL Berchok, KM Stafford, TA
Marques, and KH Kim.  2021.  Estimating acoustic cue rates in bowhead
whales, *Balaena mysticetus*, during their fall migration through the
Alaskan Beaufort Sea.  Journal of the Acoustical Society of America,
149(5):3611-3625.

Abstract:  Eight years of passive acoustic data (2007–2014) from the
Beaufort Sea were used to estimate the mean cue rate (calling rate) of
individual bowhead whales (*Balaena mysticetus*) during their fall
migration along the North Slope of Alaska.  Calls detected on directional
acoustic recorders (DASARs) were triangulated to provide estimates of
locations at times of call production, which were then translated into call
densities (calls/hour/km2).  Various assumptions were used to convert call
density into animal cue rates, including the time for whales to cross the
arrays of acoustic recorders, the population size, the fraction of the
migration corridor missed by the localizing array system, and the fraction
of the seasonal migration missed because recorders were retrieved before
the end of the migration.  Taking these uncertainties into account in
various combinations yielded up to 351 cue rate estimates, which summarize
to a median of 1.3 calls/whale/h and an interquartile range of 0.5–5.4
calls/whale/h.

The paper can be obtained at the following link:
https://asa.scitation.org/doi/full/10.1121/10.0005043

Or by email request:
susa...@greeneridge.com or apoflav2w...@gmail.com

Best,
Susanna

Susanna B. Blackwell, Ph.D.
Senior Scientist, Greeneridge Sciences, Inc.
Research Associate, UC Santa Cruz
___
MARMAM mailing list
MARMAM@lists.uvic.ca
https://lists.uvic.ca/mailman/listinfo/marmam

[MARMAM] New publication: Source Levels of 20 Hz Fin Whale Notes measured from Ocean-Bottom Seismometers

[Andreia Pereira]

Dear MARMAM community,
On behalf of my co-authors, I am pleased to inform you on the publication of 
our open-access article:

Pereira, A.; Romagosa, M.; Corela, C.; Silva, M.A.; Matias, L. "Source Levels 
of 20 Hz Fin Whale Notes Measured as Sound Pressure and Particle Velocity from 
Ocean-Bottom Seismometers in the North Atlantic" J. Mar. Sci. Eng. 2021, 9, 646.

ABSTRACT:
Source level is one factor that determines the effectiveness of animal signal 
transmissions and their acoustic communication active space. Ocean-bottom 
seismometers (OBS) are platforms of opportunity to monitor marine species 
because they record data as pressure fluctuations in the water using a 
hydrophone and/or as particle velocity of the seabed using a seismometer. This 
study estimates source levels of 20 Hz fin whale notes recorded simultaneously 
in these two OBS channels and in two areas of the North Atlantic (Azores and 
southwest Portugal). It also discusses factors contributing to the variability 
of the estimates, namely geographical (deployment areas), instrumental 
(recording channels and sample size), and temporal factors (month of detected 
notes, inter-note interval, and diving duration). The average source level was 
196.9 dB re 1 µPa m for the seismometer (derived from particle velocity 
measurements) and 186.7 dB re 1 µPa m for the hydrophone. Variability was 
associated with sample size, instrumental characteristics, acoustic 
propagation, and month of recordings. Source level estimates were very 
consistent throughout sequences, and there was no indication of geographical 
differences. Understanding what causes variation in animal sound source levels 
provides insights into the function of sounds and helps to assess the potential 
effects of increasing anthropogenic noise.

The full article is available here:
https://doi.org/10.3390/jmse9060646

The article was published in a special issue of the Journal of Marine Science 
and Engineering titled "Ocean Noise: From Science to 
Management".


Kind regards,
Andreia Pereira



--
Andreia Pereira

Research Fellow

IDL - Instituto Dom Luiz
Faculty of Sciences of the University of Lisbon
Edifício C8 - Room 8.3.20 | Campo Grande | 1749-016 Lisboa | Portugal | 
+351966321466

ECCO Ocean
https://ecco-ocean.com/

Associação para as Ciências do Mar
https://cienciasmar.wixsite.com/associacao
___
MARMAM mailing list
MARMAM@lists.uvic.ca
https://lists.uvic.ca/mailman/listinfo/marmam

[MARMAM] New Publication on gray seal isotopic niches

[Keith Hernandez]

Hello MARMAM community,

On behalf of my coauthors, I am excited to share our latest publication in
*Marine** Ecology Progress Series*.

Keith M. Hernandez, Wendy Blay Puryear, Jonathan A. Runstadler, Michael J.
Polito (2021) Little interannual variability in gray seal (*Halichoerus
grypus*) trophic niches during pregnancy despite variable environmental
conditions. Marine Ecology Progress Series 667: 207-217. DOI:
https://doi.org/meps/10.3354/meps13702

ABSTRACT: The successful recruitment of juveniles into a population is
often dependent on receiving sufficient nutrition pre- and
post-parturition. Thus, variation in maternal foraging ecology during
pregnancy, whether due to prey choice, prey availability or fluctuations in
environmental conditions, can impact offspring fitness in the subsequent
breeding season. As many pinnipeds spend the majority of the gestation
period at sea, past studies have used the biogeochemical analysis of pup
tissues to infer female diets during this critical period. The objective of
our study was to examine the trophic niches of a population of pregnant
female gray seals *Halichoerus grypus* over a 4 yr period in coastal
Massachusetts, USA by analyzing the stable carbon (δ13C) and nitrogen (δ15N)
values of pup lanugo. In addition, we sought to determine if individual and
inter-annual variation in pup body condition could be explained by
differences in female trophic niches, prey availability, or environmental
conditions. Stable isotope-based metrics of trophic niche position, width,
and overlap indicated little to no interannual variability in female
foraging ecology at the population level despite variation in environmental
conditions and prey availability in the fall on Georges Bank. Model
selection indicated a positive relationship between pup body condition and δ
13C values, which is indicative of pregnant females foraging on benthic,
demersal, or nearshore prey species during the fall prior to parturition.
This indicates that individual variation in female foraging ecology during
pregnancy has a carry-over effect on offspring condition with possible
implications for first-year survival, and ultimately recruitment to the
adult population.

The article can be found at the link here
, or you can reach
me at keith.hernandez2...@gmail.com for a PDF copy or with any questions or
feedback.

Best,
Keith
-- 
Keith M. Hernandez, PhD | he/him/his
Postdoctoral Scholar-Employee
Ecology and Evolutionary Biology Department/Institute of Marine Sciences
University of California Santa Cruz
Santa Cruz, CA
Google Scholar

|
ResearchGate 
___
MARMAM mailing list
MARMAM@lists.uvic.ca
https://lists.uvic.ca/mailman/listinfo/marmam