Menidia menidia

[Lab news] Measuring juvenile silversides. Live.

10 October 2017. Today, Chris, Emma, and Julie measured over 400 juvenile Atlantic silversides for their length and weight. This time, however, we did not euthanize the fish before, but successfully measured them while still alive, only a little drowsy from the mild anesthetic we administered before.

Click on the video below to have a look for yourself.
Congratulations all, for a job well done!


[Lab news] Chris and Hannes attend ICES Annual Science conference

ASC 2017 poster

On 19-21 September 2017, Chris Murray and Hannes Baumann traveled to Fort Lauderdale, Florida, to attend the ICES (International Council for the Exploration of the Sea) Annual Science Conference in order to present our ongoing NSF and NOAA funded research on potential ocean acidification effects in Atlantic Silversides and Norther Sand lance. Due to Hurricane Irma, which had impacted all of Florida just a week earlier, it was a great relief that the conference could actually be successfully held.

Together with Chris Chambers (NOAA), Ian Bradbury (DFO, Canada), and Richard McBride (NOAA), Hannes convened a theme session titled “Patterns, sources, and consequences of intraspecific variation in responses of marine fauna to environmental stressors“.

Chris gave a talk and a poster during this session, which was well received and was a worthwhile exposure for Chris and our lab’s research.


  • Murray, C. S. and Baumann H. 2017. Growth costs of high CO2 environments in a marine fish: importance of feeding methodology. Talk.
  • Murray, C. S., Wiley, D., and Baumann H. 2017. A preliminary study testing the effects of high CO2 on the early life stages of the northern sand lance Ammodytes dubius. Poster.

[Lab news] Group effort – starting new silverside experiments in June 2017

It’s the beginning of June, and in the Baumann lab that means: high time for experimental research on the Atlantic Silverside, the famous forage fish and important model species! This year, we have several major objectives; our NSF-sponsored research examines the sensitivity of offspring to the individual and combined effects of high CO2 and low oxygen (Chris Murray), while in collaboration with our colleagues from Cornell University we rear several families for genetic and transcriptomic studies. Elle Parks, our REU student just started her work on the effects of CO2 and temperature on the starvation resistance of silverside larvae. As always, the days when new experiments start are a group effort, where everybody including many volunteers help. Thanks to Peter Morenus (UConn) for the coming down for documenting the activities!

This story is also featured on UConn Today.



[New publication] Long-term growth consequences of acidification in Atlantic silversides

October 10th 2016 was a special day for our still young lab here at the University of Connecticut, Today, the ICES Journal of Marine Science published the paper of Chris Murray et al., which is the first of hopefully many publications of our experimental findings originating out of our new laboratory facility here at UConn Avery Point.
Chris and his co-authors report on a large-scale, quantitative rearing experiment on Atlantic silversides eggs, larvae and juveniles under contrasting CO2 conditions that took place between May – September 2015. This novel experiment was designed to address three critical issues lacking in previous ocean acidification research on fish. First, the study spanned several ontogenetic stages. Second, it used very large numbers of individuals to robustly characterize not just potential shifts in mean responses, but also changes in the distribution of length, weight, and condition factor. Third, it provided food at standardized, non-excess levels to prevent that potential metabolic costs of high CO2 exposure could be compensated by survivors simply by eating more food.
Overall the study demonstrated seemingly small but significant growth reductions due to high CO2 and identified a small number of fatty acids that were of significantly different concentrations in high vs. control juveniles.

murray-etal-ijms2016_fig3
Distributions of condition factor per 2mm TL interval for juvenile M.menidia reared for 122dph at control (a) and high CO2 conditions (b). Thick and thin black lines correspond to the 10th/90th and 25th/75th percentiles, respectively, while the red line depicts the median. Data below the 10th and above the 90th percentiles are depicted by black dots. Underlying grey bars show relative frequencies for each 2 mm TL class. Black and grey numbers correspond to numbers of individuals measured for both TL and wW, or for TL only, respectively.
murray-etal-ijms2016_fig4
Cumulative frequency distributions of (a) total length (TL) and (b) wet weight (wW), in juvenile M. menidia reared for 122 dph at control and high CO2 conditions.


Murray, C.S.*, Fuiman, L., and Baumann, H. (2016)
Consequences of elevated CO2 exposure across multiple life stages in a coastal forage fish.
ICES Journal of Marine Science (published online 10 Oct 2016)

[Lab News] The new silverside generation is here!

Rafeed-Hussain
By Rafeed Hussain
On a balmy July 1st the lab returned to Mumford Cove excited at the prospect of seining without dawning waders for the first time this year! Chris and Rafeed conducted the first seine while Jake remained on the beach and photographed the experience. On the second seine, Hannes accompanied Rafeed while Chris weighed the first sample. As expected the species richness and diversity of the seines were less than that of previous excursions. The abundance of silversides was down, while their sex ratio was skewed towards females. Despite a decline in mature silversides, several juveniles were caught, indicating a budding cohort. Perhaps more young silversides will find their way into the lab’s net in the future. Only time will tell!

New-silverside
The first of 2016. On July 1st, the beach seine is catching a few 35 mm silversides – the new generation.

Chris-HB-Mumford-Cove
On 1st July 2016, Chris and Hannes look carefully through the bag of the beach seine to find the first juveniles of this year

[Talk] Chris & Jake present at the Feng Graduate Research Colloquium


On 12 May 2016, the Department of Marine Science hosted it’s 11th Biennial Feng Graduate Research Colloquium, during which graduate students of the department traditionally present findings of their thesis research and/or give a preview of their future plans.

This year, Chris presented the results of last years study on long-term changes in growth distributions in Atlantic silversides exposed to high CO2 conditions, whereas Jake presented a poster outlining his thesis research on long-term environmental and biological data collected by Project Oceanology.

In addition, Jake took his poster ‘on the road’ already and presented it at the 16th Long Island Sound Research Conference (13 May, Bridgeport, CT), while Chris will give his talk again at the 40th Larval Fish Conference in June 2016 (17-23 June, Chesapeake Biological Laboratory, Solomons MD).


Murray et al Feng LFC talk


Jake poster

[Outreach] A busy year in Mumford Cove

On 13 April, Hannes was invited to the board meeting of the Mumford Cove Association to present a brief update about our groups research activities in and around the cove. It is part of our commitment to public education and outreach to keep property owners informed and maintain good relationships with all parties involved.

The information material below contains graphical summaries of our activities, i.e., measuring water quality parameters continuously with a logging probe and conducting biweekly beach seine surveys for silversides.

To a productive year 2016 in the cove!

Mumford Cove Ass_probe
Mumford Cove Ass_silversides