Life Sciences Commons^™

Interactive Effects Of Tidal Height And Predator Exclusion On Growth And Survival Of Wild And Cultured Juveniles Of The Soft-Shell Clam, Mya Arenaria L., At Two Intertidal Flats In Southern Maine, Brian F. Beal

Maine Sea Grant Publications

A comparative field experiment was initiated at two intertidal flats in southern Maine (Wells – Webhannet River; Portland – Fore River) in May 2014 to examine the interactive effects of tidal height and predator exclusion on the growth and survival of cultured individuals of the soft-shell clam, Mya arenaria L. (x_{Shell length} = 12.95 ± 0.20 mm). Experimental units (0.018 m²) were placed near the upper and lower intertidal and filled with ambient sediments at both sites. Clams were added to units at a density of 660 ind. m^-2. Predator exclusion included five treatments: 1) …

Population Ecology And Epidemiology Of Sea Lice In Canadian Waters, Sonja M. Saksida, Ian Bricknell, Shawn M. C. Robinson, Simon Jones

Maine Sea Grant Publications

Sea lice are found on farmed and wild fish on both the west coast and east coast of Canada. The predominant species on both coasts is referred to as Lepeophtheirus salmonis but indications are that the two groups are genetically different. Caligus species are also found on both coasts, these too are different species: Caligus clemensi and C. elongatus, respectively. There has been extensive work on sea lice on both wild and farmed fish over the last decade. Research indicates that L. salmonis, commonly referred to as the salmon louse; may have a broader host range than commonly …

From Wealth To Poverty: The Rise And Fall Of Cod Around Mount Desert Island, Natalie Springuel, Bill Leavenworth, Karen Alexander

Maine Sea Grant Publications

The history of cod fishing in the Gulf of Maine, particularly around Mount Desert Island and the Down East coast, begins with a tremendous diversity and volume of fish and ends in a marine ecological tragedy. It is a story of decline that cannot be told in isolation from farming and timber harvesting or from other fisheries. But it is also a story of people. Many thousands of people around Mount Desert Island in the last four hundred years have built their lives around cod and other fish. Cod drew settlers to the region, provided work in the fishery and …

The American Lobster Settlement Index: An Early Warning System?, Maine Sea Grant College Program

Maine Sea Grant Publications

The harvest of American lobsters is the Gulf of Maine’s largest, most valuable, and most iconic fishery. The catch has never been higher, but how long will it last? Fishing communities in eastern Maine and southern Nova Scotia are seeing historically high landings, some five times higher than the 1980s. At the same time, the lobster fishery south of Cape Cod has all but collapsed, plagued by shell disease and stressfully warm summers. It has never been more important to monitor this vital fishery. The American Lobster Settlement Index measures the annual pulse of baby lobsters to rocky nurseries some …

21st Century Marine Science For Maine People: Maine Sea Grant Strategic Plan 2014-2017, Maine Sea Grant College Program

Maine Sea Grant Publications

Maine’s coastal communities were founded on natural resources, from fish and shellfish to stone, salt, and wood. Many communities continue to depend on marine resources, and some are experiencing demographic, economic, political, and environmental changes that create conflict and have the potential to erode Maine’s unique natural and cultural heritage. Maine Sea Grant envisions a future in which Maine’s coastal communities are resilient to challenges and changes—resilient communities continually gather the necessary skills, knowledge, and resources (human and physical) to plan for, cope with, and thrive in the face of both predicted and unexpected change.

The University of Maine is …

Mud Blister Worms And Oyster Aquaculture, Dana L. Morse, Paul D. Rawson, John N. Kraeuter

Maine Sea Grant Publications

The mud blister worm, Polydora websteri Hartman (Loosanoff and Engle 1943), burrows into the shells of bivalve mollusks, including Eastern oysters (Crassostrea virginica), sea scallops (Placopecten magellanicus) and blue mussels (Mytilus edulis).

This report is for oyster producers interested in controlling mud blister worms, which when present in large numbers can reduce the value of oysters sold to the half-shell market. Although other species of blister-causing worms occur in several genera including Polydora, Pseudopolydora, and Boccardia, this report focuses specifically on Polydora websteri.