Developing a growth-transition matrix for the stock assessment of the green sea urchin (Strongylocentrotus droebachiensis) off Maine.

Fishery Bulletin | October 1, 2003| | Copyright

Abstract--The green sea urchin (Strongylocentrotus droebachiensis) is important to the economy of Maine. It is the state's fourth largest fishery by value. The fishery has experienced a continuous decline in landings since 1992 because of decreasing stock abundance. Because determining the age of sea urchins is often difficult, a formal stock assessment demands the development of a size-structured population dynamic model. One of the most important components in a size-structured model is a growth-transition matrix. We developed an approach for estimating the ...

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