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Recent News, Publications and Hot Topics
|New Publication - 12/2013: Hohn, A.A., D.S. Rotstein, and B.L. Byrd. 2013. Unusual mortality events of harbor porpoise strandings in North Carolina, USA, 1997-2009. J. of Marine Biology Volume 2013 (2013), Article ID 289892, 13 pages. (Open access).
"Although harbor porpoise are generally a cold-water species, North Carolina is second only to Massachusetts along the east of the US for the number of harbor porpoise that strand. During 1999 and 2005, elevated numbers of strandings represented Unusual Mortality Events (UME). This paper describes the characteristics of strandings during UME and non-UME years. We were unable to determine the cause of the events, although it appears as though the 2005 was not due to disease factors."
|New Publication - 12/2013: Rossman, Sam, Nélio B. Barros, Peggy H. Ostrom, Craig A. Stricker, Aleta A. Hohn, Hasand Gandhi, Randall S. Wells. 2013. Retrospective analysis of bottlenose dolphin foraging: a legacy of anthropogenic ecosystem disturbance. Marine Mammal Science 29(4):705-718.
"Long-term data sets allowed us to evaluate the effects of changes in the ecosystem of Sarasota Bay, Florida, on changes in foraging in bottlenose dolphins from 1944-2007. We attributed a reduction in stable isotope ratios of carbon to a reduction in seagrass habitat available for foraging and an increase in stable isotopes of nitrogen to nutrient loading due to a rapidly increasing human population. This approach allowed for a retrospective analysis of anthropogenic disturbance on coastal food webs."
|New Publication - 12/2013: Ellin, R., Spiegler, S, Currin, C., Ellis, C., Fear, J., Hohn, A., Jenkins, W., Meyer, D., Miller, T.,
Price, C., Shein, K. 2013. North Carolina Sentinel Site Cooperative: Report on the Sea-Level
Rise Research and Monitoring Coordination Workshop. NOAA Technical Memorandum
NMFS-SEFSC650. 56 pp.
"The newly founded North Carolina Sentinel Site Cooperative held a workshop to identify priorities for research and monitoring priorities of sea-level rise and its effects. Seven priority gaps were identified and development of a citizen science program was encouraged. A copy of the report can be obtained at /oceanservice.noaa.gov/sentinelsites/
|New Publication - 07/2013: Bacheler, Nathan M., Z.H. Schobernd, D.J. Berrane, C.M. Schobernd, W.A. Mitchell, N.R. Geraldi. 2013. When a trap is not a trap: converging entry and exit rates and their effect on trap saturation of black sea bass (Centropristis striata). ICES Journal of Marine Science 70(4):873-882.
" Catch rates are often used to index the abundance of marine organisms, but catch saturation (i.e. declining catch rate as fishing time increases) can decouple catch and abundance. We used underwater video to document entries and exits of black sea bass from chevron traps, and showed that catch rates were nonlinear and asymptotic for most trap samples. However, many lines of evidence suggests black sea bass catch at saturation is positively related to true abundance."
|New Publication - 07/2013: Bacheler, Nathan M., Valerio Bertolino, and Marcel J.M. Reichert. 2013. Influence of soak time and fish accumulation on catches of reef fishes in a multispecies trap survey. Fishery Bulletin 111(3) 218-232.
" We used data from long-term trap surveys (1990–2011) in the southeastern U.S. Atlantic to show that catch rates of eight reef fish species saturated either across the range of soak times examined or the level of total catch in the trap. The authors recommend that future studies should standardize catch or catch rates with regression modeling approaches that incorporate soak time, total fish accumulation in the trap, and any other predictor variable that may ultimately influence catch."
|CRUISE NEWS - 07/2013:
"The SouthEast Fishery Independent Survey (SEFIS) recently completed a research cruise aboard the NOAA Ship Pisces off the East Coast of Florida. Over 16 days at-sea, SEFIS deployed 230 camera-trap arrays, mapped ~110 square kilometers of bottom, and successfully expanded sampling effort in this critical region. SEFIS thanks all cruise participants, the crew of the Pisces, and fishermen who provided hardbottom points."
|New Publication - 03/2013: Bacheler, Nathan M., C.M. Schobernd, Z.H. Schobernd, W.A. Mitchell, D.J. Berrane, G.T. Kellison,, and Marcel J.M. Reichert. 2013. Comparison of trap and underwater video gears for indexing reef fish presence and abundance in the southeast United States. Fisheries Research 143: 81-88.
"Our manuscript evaluates the effectiveness of both underwater video and chevron traps to index a variety of economically-important reef fish species, and shows that valuable information can be gained by affixing video cameras to fish traps in the Southeast."