Talks

Lucas Jones presents his Masters Thesis research!

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Lucas and Hannes celebrating the successful thesis presentation

Monday, November 22nd 2021. Big and heartfelt congratulations to Lucas Jones, who presented his Master thesis to his peers at the institute and colleagues national and international. Well done, Lucas!

A link to his recorded presentation will be posted here soon.


The UConn Department of Marine Sciences

Presents a Master’s Thesis Presentation by

Lucas Jones

B.A., University of Connecticut, 2018

4:00 p.m., Monday, November 22, 2021

Marine Sciences Building, Seminar Room 103

 

Using Low-Coverage, Whole Genome Sequencing to Study Northern Sand Lance (Ammodytes dubius) Population Connectivity in the Northwest Atlantic

 Northern sand lance (Ammodytes dubius) are key forage fish in Northwest Atlantic (NWA) shelf ecosystems, where they exclusively occur on coarse-grain, offshore sand banks. This patchy occurrence may result in genetically more fragmented, less connected populations, but traditional morphological or genomic approaches have so far been unsuccessful in fully resolving the species’ population structure and connectivity. My study pursued an alternative genomic approach, using low-coverage, whole genome sequencing (LcWGS) to address these important questions. I extracted DNA from 273 A.dubius specimens collected by collaborators from sevenregions across the species geographical range, from Greenland to New Jersey, USA. From LcWGS data, I identified 11,558,126 single nucleotide polymorphisms (SNPs) that allowed quantifying genetic differentiation between populations (FST), thereby revealing the genetic structuring of populations throughout the NWA. Despite the potentially homogenizing influence of the general north to south ocean circulation, I found a clear genetic break around Nova Scotia that delineated a northern from a southern A. dubius supergroup. Only within the southern supergroup, genetic distances increased with the geographic distance between sample sites. At the focal site of Stellwagen Bank (southern Gulf of Maine), A. dubius samples collected over several years (2014 – 2019) revealed small but significant temporal genetic differences that imply varying occupation of this offshore habitat by genetically different sand lance contingents. Inclusion of samples from the inshore congener A. americanus confirmed the clear genetic separation between both species and further determined that all sand lance caught on Stellwagen Bank are exclusively A. dubius. Overall, my work suggests the existence of two spatially distinct A. dubius populations with little ‘realized’ connectivity, which is critical knowledge to aid protection and management of offshore marine resources.

 

Major Advisor:                   Hannes Baumann

Associate Advisor:            Nina Overgaard Therkildsen

Associate Advisor:            Senjie Lin

44th Larval Fish Conference held virtually 24-26 June

Groton, CT 24-26 June 2021. The long awaited and anxiously prepared virtual 44th Larval Fish Conference was held, featuring more than 240 participants from 28 countries. 58 scientific talks, including 3 keynote lectures were given via Cisco’s WebEx platform, whereas networking activities such as poster presentations, ‘Meet the Speaker’ events, and Mentor hours used the innovative Gatherly platform. The technology was working out well, the preparation paid off, and delegates were overall enthusiastic about this virtual alternative, which was forced on us by Covid-19, but may have shown us new ways and concepts to broaden the societies reach and equality.

The post-conference website is housed at https://lfc44.marinesciences.uconn.edu

Special thanks go to the scientific steering committee Eric Schultz, Jacqueline Webb, and Paul Anderson. Lauren Schaller, Anne Hill, Harley Erickson, and Kate Copeland from UConn’s conference services did a great job as well preparing and running parts of the events. Support came from NOAA’s Northeast Fisheries Science Center.


‘Hooked on OA’ – Hannes talks about fish CO2 sensitivity to recreational anglers

25 February 2021. The Mid-Atlantic Ocean Acidification Network (MACAN) organized a four-part webinar series on Ocean Acidification geared specifically towards recreational anglers and shellfish collectors in the Mid-Atlantic region. The series is called “Hooked on OA” and invited Hannes on this February Thursday to explain the state of OA science particularly for fishes. A big thanks to the organizers and the more than 50 people who participated in this webinar.

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If you missed it and are still interested, you can watch the Zoom webinar here:

[Lab news] Hannes & colleagues organize a Virtual Town Hall

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23 June 2020. It’s been a remarkable day. A remarkable few months of preparation. But on this Tuesday in June, more than 250 people from all over the world logged in to a UConn WebEx Event organized by Hannes Baumann, Eric Schultz, Jacqueline Webb, Paul Anderson and Jon Hare. The event, billed as the “1st Virtual Larval Fish Science Town Hall” was of course a product of the strange and challenging times we live in right now. A consequence of almost a year of painstaking preparations for the 44th Larval Fish Conference in Mystic, CT … eclipsed by the COVID-19 pandemic that made having a physical science conference impossible.


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Number of attendees per minute throughout the day. Science sessions were followed by 120-170 attendees worldwide.
Network Mentors

The Virtual Town Hall gave 16 speakers from around the world the opportunity to communicate their science, while providing a forum for the community to interact. The Early Career Committee of the AFS Early Life History Section contributed as well, organizing a round table discussion led by Kelsey Swieca with Chris Chambers, Jackie Webb, and Peter Konstantidinis. Individual networking meetings – although hobbled initially by technology – were held after the meeting between senior and early career researchers.

And best of all – more than 40 people participated in a picture contest, contributing stunning images of larval fish or larval fish science.

For more information, speaker bios’s, talk titles, abstracts and even some video please visit the event website lfc44.uconn.edu


Some of our personal favorites among the best larval fish picture submissions

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Mike Bartick | Ribbon fish
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Irene Middleton | A diver checks out a juvenile flying fish at the Poor Knights Islands in New Zealand
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Suzan Meldonian | Cyclopsetta fimbriata, photographed in situ along Gulf Stream Current, SE Florida
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Winner – Kerryn Parkinson | Mola sp – a larval sunfish collected off New South Wales, Australia.
A23---Monteiro---Tilefish_CNamiki
Gabriel Monteiro | Caulolatilus chrysops larvae cleared and stained. This specimen belongs to ColBIO USP biological collection.
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Harvey Walsh | Bothus larvae sorted at sea from a bongo net tow collected during the summer of 2017 aboard the NOAA Ship Gordon Gunter.
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Chris Murray | Wild Pacific herring spawn from Skagit Bay, WA (~72 h old). Note the flat edge of the egg where it was adhered to sea grass.
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Henrique Grande | Post-larval reef fish Acanthurus coeruleus Bloch & Schneider, 1801 collected in 2015 using light traps in the Bay of Tamandaré, Brazil.

[Presentation] Callie presents research at the Graduate Climate Conference

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Callie presenting her poster to other graduate students
November 8, 2019. Callie Concannon joined other graduate students of the Department of Marine Sciences to present her thesis research at the Graduate Climate Conference in Woods Hole, MA. She presented a poster entitled “Long-term CO2 and temperature effects on fecundity and oocyte recruitment in the Atlantic silverside
Her preliminary findings can be summarized as:

Warmer, more acidic environments impact reproductive output in the Atlantic silverside


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The participants of the Graduate Climate Change conference in November 2019

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[Lab news] Hannes, Chris and Emma at the 43rd Larval Fish Conference!

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Chris, Hannes, and Emma

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Beautiful view from Mallorca’s most northern point, Cap Formentor

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Peter Gronkjaer, Dominique Robert, Arild Folkvord, Hannes during the conference tour
25 May 2019. Hannes, Chris and Emma attended this years 43rd Annual Larval Fish Conference in Palma de Mallorca, Spain. The event was hosted by IMEDEA’s Ignacio Catalan and colleagues and was attended by more than 140 participants. As usual, the small but international make-up of the meeting and made it into a memorable event of science, networking and seed for potential future collaborations. While Chris reported on our past experiments on factorial CO2 by O2 effects on Atlantic silverside early life stages, Emma presented the latest findings on our silverside experiments using computer-controlled CO2 and O2 co-fluctuations.

Before and after the conference, there was also some time to explore the beautiful island of Mallorca with its breathtaking mountain scenery and turquoise coves.


Chris and Emma’s presented:

  • Murray, C.S., Cross, E.L., and Baumann H. A factorial evaluation of the combined effects of acidification and hypoxia in Atlantic silverside offspring. Talk.
  • Cross, E.L., Murray, C.S. and Baumann H.Diel and tidal cycles of CO2 and dissolved oxygen conditions provide physiological refuge to a coastal forage fish, Menidia menidia under acidification and hypoxia. Talk.

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A special thanks to Lucas and Callie for holding the fort at home!

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Cala des Moro

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Martha Moyano and Hannes
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Valdemossa

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Cap Formentor

[Lab news] Chris defends his dissertation!

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Chris smiling after his committee congratulated him on his dissertation defense (f.l.t.r: Chris Chamber, Chris Gobler (via Skype), Eric Schultz, Hans Dam, Chris Murray)
6 December 2018. Today, the whole Baumann lab is congratulating Chris Murray today on his great day of defending his PhD. Chris presented the essence of his research on climate change effects on coastal marine fish to a packed audience in the seminar room, fielded an array of questions, and showed his deep knowledge of the subject during the subsequent discussion with his committee.
Well done, Dr. Murray! We are all so very proud of you!

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The bubbly is opened in the Rankin Lab in true experimenter fashion!
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Chris Murray and Chris Chambers in front of the sand lance tank in the Rankin Lab

[Lab news] Baumann and Dam labs at the Gordon Research Conference

GRC2018


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The beautiful venue of the Waterville Valley Hotel in New Hampshire

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Hannes introduced the Ocean Variability Hypothesis

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Phil Munday and Hannes chatting along the beautiful hike of Cascade Path
19 July 2018. Members of the Baumann and Dam labs cherished the opportunity to participate in the Ocean Global Change Biology Gordon Research Conference in Waterville Valley, NH.

The particularly intimate format of the Gordon Research Conference was wonderfully conducive to listening to groundbreaking science in form of keynote lectures and posters and to network with colleagues from all over the world. While Hannes gave a keynote lecture about experimental progress in assessing fish sensitivity to marine climate change, Chris, Emma, Jimmy and Hans presented their research all throughout the week during the poster sessions. The beautiful setting of the conference in New Hampshire’s White Mountains and the relaxed atmosphere were all contributing to one of the most unique conference experiences all year.


Talks and posters presented:

  • Baumann H. Using experiments to assess the sensitivity of fish to marine climate change: progress and knowledge gaps. Invited keynote talk.
  • Murray, C.S., Wiley, D., and Baumann H. Sand lance offspring (Ammodytes dubius) show high sensitivity to combined climate stressors. Poster.
  • Cross, E.L., Peck, L., and Harper, E. Brachiopod resilience: thicker shells offset dissolution under future ocean acidification and warming. Poster.
  • Dam, H.G., DeMayo, J.A., Park, G., He, X., Finiguerra, M., Baumann H., and Pespeni, M. Rapid adaptation of a marine copepod to a greenhouse world. Poster.
  • DeMayo, J.A., Park, G., Norton, L., Finiguerra, M., Baumann H., and Dam, H.G. Costs of adaptation to a greenhouse world for the copepod, Acartia tonsa. Poster.

GRC-posters


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The Baumann & Dam lab at the GRC hike
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[Lab news] Baumann lab attends the Larval Fish Conference in Victoria

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Holding the fort at the Rankin lab were Emma and Sydney, who did an excellent job. Thank you guys!

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The Delta Victoria Ocean Pointe Resort was the conference venue

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Before the conference, we all attended a workshop on larval fish identification

https://www.fishersci.com/shop/products/fisherbrand-class-a-clear-glass-threaded-vials-attached-caps-pe-poly-seal-cone-liner-8/14955326
Whale-watching with Corinne, Julie & Chris
Here is how Julie experienced her first LFC:

Ever since attending the American Fisheries Society conference in 2014, I’ve wanted to go to another fish-focused conference. I was lucky enough to attend the 42nd annual Larval Fish Conference this year in Victoria, British Columbia, and it surpassed all my expectations. The week started off with a larval fish identification workshop where we got to learn techniques from renowned larval fish experts (and see some really cool fish larvae!). The talks were impressive and thought-provoking, providing many new ideas for research and how to give an engaging talk. My favorite part was meeting all the larval fish ecologists whose publications I’ve been reading for my thesis. I spent most of my evenings exploring Victoria with other grad students attending the conference and left with many new friends from institutes all over the world! The trip ended with a whale watch, where we saw a pod of 5 Orcas. Overall, the Larval Fish Conference was a great experience that I hope to someday attend again!


Oral presentations:

  • Pringle, J. and Baumann, H. Sex-specific growth and mortality patterns in juvenile Atlantic silversides (Menidia menidia) from Connecticut waters. Talk. 42nd Larval Fish Conference, Victoria, BC, Canada 24-28 June 2018
  • Murray, C.S., Wiley, D., and Baumann, H. Early life stages of the northern sand lance Ammodytes dubius show high sensitivity to acidification and warming in a CO2 × temperature factorial experiment. Talk. 42nd Larval Fish Conference, Victoria, BC, Canada 24-28 June 2018

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Water taxi in Victoria

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Old Victoria
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Beyond this point …
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Orca whale
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Harbor front with Parliament building
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Local celebrity, the one eyed seal

[Lab news] Baumann lab at OSM2018 and the OA-PI meeting

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Members of the Baumann lab attended two back-to-back meetings in Portland, OR, in February. From 11-16 February, we participated in 2018 Ocean Sciences Meeting, while from 17-19 February we all took part in the 4th Ocean Acidification Principal Investigators meeting.

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Holding the fort at the Rankin lab were Julie and Charles, who did an excellent job. Thank you guys!

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At OSM, Hannes chaired a large session (OC51, OC52) titled “Multiple Stressors and Multiple Disciplines: Understanding the Consequences of Global Ocean Change for Marine Species” together with colleagues from Bermuda Institute of Ocean Sciences (BIOS, Amy Maas), the Virgina Institute of Marine Sciences (VIMS, Emily Rivest), and the University of South Carolina (Catherine Davis). The line-up of speakers was impressive and included our very own Emma Cross (speaking on brachiopod resistance to CO2) and Hans Dam (presenting our findings of multigenerational CO2 effects on the copepod Acartia tonsa).

At the OA PI meeting, Hannes gave an summary talk of key advances in the field of experimental OA approaches, while all of us worked in small synthesis groups on synthesizing products and projects.

Portland, albeit rainy, was as usual a great city to come to.


OSM2018 sessions OC51, OC52 (Baumann, Maas, Rivest, Davis)
Multiple Stressors and Multiple Disciplines: Understanding the Consequences of Global Ocean Change for Marine Species

    Session 1

  • Zimmerman et al. Modeling the Impacts of Water Quality and Climate Change on Submerged Aquatic Vegetation in the Chesapeake Bay
  • Frieder et al. Advancements in Quantifying Energy Costs for Organisms to Respond to Ocean Change
  • Hofmann et al. Who’s Your Mommy? Transgenerational Effects in Purple Sea Urchins from Nearshore Kelp Forests in California
  • Waldbusser et al. Understanding the multi-stressor impacts of ocean acidification on marine calcifiers: What controls biocalcification? Saturation state or substrate inhibitor ratio
  • Silbiger et al. Nutrient addition disrupts dependence of calcification on aragonite saturation state
  • Cross et al. A 120-year record of resilience to environmental change in brachiopods
  • Dam et al. The copepod Acartia tonsa in a greenhouse world: Transgenerational plasticity of life history traits
  • McLaskey et al. Ocean Acidification Driven Changes to Food Quality are Transferred Unpredictably Across Trophic Levels
    Session 2

  • Palmer et al. Recent Fossil Record Provides Unique Insight into Impacts of Multiple Stressors on Community Ecology
  • Krumhardt et al. Coccolithophore growth and calcification under future oceanic conditions
  • Rivest et al. Multiple stressors elicit unique responses in animal and algal partners: the potential for physiological plasticity in symbiotic coral larvae under global ocean change
  • Cornwall et al. Impacts of pH Variability and Past pH History on Coral and Coralline Algal Calcification: a Mechanistic and Multi-generational Approach
  • Eagle et al. Combining microelectrode and geochemical approaches to study the impact of pCO2 and temperature changes on the internal pH and carbonate chemistry of corals and their relation to growth responses
  • Weinnig et al. Physiological Response of a Cold-Water Coral (Lophelia pertusa) to the Combined Stressors of Climate Change and Hydrocarbon Influence
  • Bednarsek et al. Interactive effects of temperature and acidification on pteropod distributions in the California Current Large Marine Ecosystem
  • Davis et al. Juvenile Rockfish Recruits Show Resilience to CO2-Acidification and Hypoxia across Biological Scales