Total: 124

Layer from MMWebber, 8 years, 5 months ago

Sea_scallops is a REGIONS dataset and contains distribution information for sea scallop (Placopectin magellanicus) for the coast of Maine . Polygons are based on locations indicated by town officials, harvesters, Harbormasters, DMR biologists, DMR specialists or DMR scientists from February 2008 to May 2009. POLYGON codes include: Town, County, Species, NOAA_Chart, Updated, Shape, ACRES, OBJECTID, SHAPE_AREA, SHAPE_LEN, and Source. A COMMENT field indicates sea scallop locations obtained from DMR sea scallop tow survey data generated during 2005 - 2007.

Download Keywords: molluscan , 40000 , biology , commodities , sea scallop , marine environment monitoring , coastal , marine biology , shellfish

Layer from KReardon, 18 years, 5 months ago

eelgrass97 is a POLYGON coverage that represents Maine's eelgrass meadows, which form an important aquatic habitat for the state, suitable for mapping at 1:24,000 scale. These meadows provide shelter for juvenile fish, and invertebrates. In certain locations they also help stabilize unconsolidated sediments and shorelines. As a continuing project, sections of the coast have been flown and photographed using Kodak 2448 film at a scale of 1:12000. This photography has been supplemented in the Penobscot Bay region by 1992 flights using Kodak 2445 film. The Penobscot Bay flights were contracted by the Maine Department of Transportation and interpreted by Dr. Fred Short of University of New Hampshire. Areas in the present study were flown in the July to October period during 1993 to 1997. When possible, photography was at the time of extreme low tides, low wind velocity, good water clarity, and maximum biomass of eelgrass. These factors aid in the detection of the subtidal portion a bed. Transparencies from the 1993-1997 flights were oriented beneath and eelgrass bed locations compiled on stable-base manuscripts containing the coastline and other basemap features from the 1:24000 scale USGS topographic maps. Polygons delineating stands of eelgrass were digitized and coded using a four category scale of percent cover. Verification has been carried out by boat, on foot, and by plane. Though dense patches of eelgrass approximately 6 meters in diameter and less can be identified under good conditions, a conservative estimate of the minimum mapping unit is 150 square meters. This represents a stand of approximately 14 meters in diameter.

Download Keywords: economy , environment , oceans , biota

Layer from MMWebber, 8 years, 5 months ago

Razor_clams is a REGIONS dataset and contains distribution information for razor clam (Ensis directus) for the coast of Maine . Polygons are based on locations indicated by town officials, harvesters, Harbormasters, DMR biologists, DMR specialists or DMR scientists from February 2008 to May 2009. POLYGON codes include: Town, County, Species, NOAA_Chart, Updated, Shape, ACRES, OBJECTID, SHAPE_AREA, SHAPE_LEN, and Source.

Download Keywords: razor clam , molluscan , 40000 , biology , commodities , marine environment monitoring , coastal , marine biology , shellfish

Layer from MMWebber, 8 years, 5 months ago

Softshell_clams is a REGIONS dataset and contains distribution information for softshell clams (Mya arenaria) for the coast of Maine . Polygons are based on locations indicated by town officials, harvesters, Harbormasters, DMR biologists, DMR specialists or DMR scientists from February 2008 to May 2009. POLYGON codes include: Town, County, Species, NOAA_Chart, Updated, Shape, ACRES, OBJECTID, SHAPE_AREA, SHAPE_LEN, and Source.

Download Keywords: molluscan , 40000 , softshell clam , biology , commodities , marine environment monitoring , coastal , marine biology , shellfish