Last updated on 31 August 2016
An updated population assessment of Summer Flounder using data through 2008 showed that Summer Flounder were not overfished and overfishing was not occurring. The mortality associated with fishing was below the target reference point and the spawning stock biomass (SSB) was about 77% of the target reference point (NMFS 2008). The SSB maximum sustainable yield target reference point is 60,074 mt (NMFS 2008). The year classes from 1982 and 1983 are the largest in the assessment and the year class from 1988 was the smallest, while the 2008 year class was estimated to be the largest to recruit to the stock since 1986 (NMFS 2008).
The assessment update published in October 2011, indicated that the summer flounder stock was not overfished or subject to overfishing in 2010 (NMFS 2011; Terceiro 2011), relative to the reference points established in the SAW 47 assessment. The October stock assessment update indicated that fishing mortality (F) for 2010 was estimated to be 0.216, below the reference point FMSY = 0.310. Spawning Stock Biomass (SSB) was estimated to be 132.72 million lb, above SSBMSY = 132.40 million lb. Thus, the stock is rebuilt and no longer subject to the formal rebuilding program in place since 2000.
Last updated on 31 August 2016
The summer flounder stock was not overfished and overfishing was not occurring in 2010 relative to the biological reference points established in the 2008 SAW 47 assessment (NMFS 2011; Terceiro 2011). The fishing mortality rate was estimated to be 0.216 in 2010, below the threshold fishing mortality reference point = FMSY = F35% = 0.310. SSB was estimated to be 60,238 mt (132.802 million lbs) in 2010, just above the biomass target reference point = SSBMSY = SSB35% = 60,074 mt (132.440 million lbs). Therefore, the summer flounder stock is considered to have reached the biomass target in 2010 (NMFS 2011; Terceiro 2011).
Last updated on 31 Aug 2016
The population is declining over a generational time scale (as indicated by biomass estimates or standardized CPUE). Trends from the Northeast Fisheries Science Center (NEFSC) spring trawl surveys indicated that the total population biomass last peaked from 1976 to 1977 (NMFS 2008). Estimates were high in 2007 but dropped by half in 2008 (NMFS 2008).
Abundances from the NEFSC autumn trawl surveys were the highest in 1995 (NMFS 2008). Abundances from the NEFSC winter trawl survey have fluctuated over the years and in recent years (2004-2007) have been lower (NMFS 2008). Abundance indices from 2004 to 2007 surveys from the Connecticut Department of Environmental Protection have been low compared to earlier years (NMFS 2008). The New Jersey Bureau of Marine Fisheries has estimated that most year classes have been around or below average since 1998 and the Delaware Division of Fish and Wildlife and Maryland Department of Natural Resources abundance indices have varied over the years (NMFS 2008). Recruitment indices from the Virginia Institute of Marine Science surveys have been below average since 1990 (NMFS 2008).
- Age, size or sex distribution is skewed relative to the natural condition (e.g., truncated size/age structure or anomalous sex distribution).
- P dentatus is listed as "overfished", as "depleted", "endangered", or "threatened" by recognized national or international bodies.
- Current levels of abundance are likely to jeopardize the availability of food for other species or cause substantial change in the structure of the associated food web.