survey_name               year_begin  year_end  survey_mos                      ecosystem     avg_tow_area  best_avail_biomass_flag  avg_tow_duration  avg_tow_speed  mensuration  data_type             gear                                                                                                                           
Long_Island_Trawl_Survey  1984        2009      April-June_&_September-October  LI            0.0302942752  1                        30_min            3.5_knots      nd           Abundance_&_Biomass   14_m_otter_trawl_w/_51_mm_codend                                                                                               
VIMS_Longline_Survey      1974        2009      "May;_Jun;_Jul;_Aug;_Sep"       CB            NA            nd                       NA                N/A            NA           NONE                  Longline                                                                                                                       
VIMS_Juvenile_Trawl       1988        2010      "Jan_thru_Dec"                  CB_and_Tribs  NA            nd                       5_min             2-3_knots      NA           NONE                  "30_ft_(9.14m)_semi-balloon_otter_trawl;_1.5_in_(38.1mm)_stretched_mesh;_0.25_in_(6.35mm)_cod-end_liner"                       
ChesMMAP                  2002        2010      "Mar;May;Jul;Sep;Nov"           CB            13674_m2      nd                       17.4_min          3.2_knots      7.92_m       Biomass               "13.7_m_(headrope_length);_two-bridle;_four-seam_bottom_trawl.__Panels_are_15.2_cm_stretch_mesh;_codend_is_7.6cm_stretch_mesh."  
NMFS_Bottom_Trawl_Survey  1963        2009      nd                              GB            nd            nd                       nd                nd             nd           Biomass               nd                                                                                                                             
NMFS_Bottom_Trawl_Survey  1963        2009      nd                              GoM           nd            nd                       nd                nd             nd           Biomass               nd                                                                                                                             
NMFS_Bottom_Trawl_Survey  1963        2009      nd                              MAB           nd            nd                       nd                nd             nd           Biomass               nd                                                                                                                             
NMFS_Bottom_Trawl_Survey  1963        2009      nd                              SNE           nd            nd                       nd                nd             nd           Biomass               nd                                                                                                                             
Delaware                  nd          nd        nd                              DEL           nd            nd                       nd                nd             nd           Abundance_&_Biomass   nd                                                                                                                             
Rhode_Island              nd          nd        nd                              RI            nd            nd                       nd                nd             nd           NONE                  nd