Estimating the Maine green sea urchin stock biomass using a spatial statistics approach

Population Dynamics and Spatial Analysis of the Maine Green Sea Urchin (strongylocentrotus Droebachiensis) Fishery By

Fisheries research on the green sea urchin in Maine has been limited despite its importance to the state's fishing industry. The objective of this thesis was to generate critical information for the management and monitoring of the Maine green sea urchin fishery. In particular there are three main areas of interest: (1) an investigation of biological reference points; (2) spatial analysis and b...

A simulation framework for developing optimal sampling strategies for the Maine sea urchin stock

Acclimation and growth response of the green sea urchin Strongylocentrotus droebachiensis to fluctuating salinity

Sea urchins are osmoconformers and not typically found in euryhaline habitats. Yet the green sea urchin, Strongylocentrotus droebachiensis, is often found in areas periodically exposed to low salinity, e.g., near the mouths of rivers in the Gulf of Maine. These areas represent some of the most productive sea urchin fishing grounds in the northwestern Atlantic and are currently targeted for stoc...

Epiphytes mediate the trophic role of sea urchins in Thalassia testudinum seagrass beds

The trophic role of the sea urchin Lytechinus variegatus (Lamarck) and the importance of epiphytes as mediators of trophic interactions were evaluated in a Thalassia testudinum meadow, St. Joseph Bay, Florida, in fall 2010. Tethering experiments were deployed within the meadow to assess consumption rates, and food choice experiments, with combinations of different types of T. testudinum leaves,...

Estimating provincial Capital Stock in Iran Economy

  Investment and capital stock variables are considered as critical data requirements in economic policy making. In this context, having access to the statistics and performance of these variables is regarded as one of the requirements in economic planning. It will be more important especially at levels beyond the national level such as provincial level at which the data are not produced by na...