Parasitic dinoflagellates in the genus Hematodinium are important parasites of marine Crustacea. Outbreaks of these parasites have damaged commercial stocks of Norway lobster Nephrops norvegicus, snow crab Chionoecetes opilio, Tanner crab C. bairdi, American blue crab Callinectes sapidus, and velvet swimming crab Necora puber. Species of Hematodinium can reach high enough levels to regulate the...

The blue crab, Callinectes sapidus, is a keystone species which plays an integral ecological, economic, and sociological role in Chesapeake Bay. The blue crab functions as both predator and prey in the Bay’s complex estuarine foodweb and occupies a variety of critical habitats impacted by human activity. Blue crabs exhibit a complex life history, disperse between estuarine and marine habitats, ...

The blue crab, Callinectes sapidus, is a keystone species which plays an integral ecological, economic, and sociological role in Chesapeake Bay. The blue crab functions as both predator and prey in the Bay’s complex estuarine foodweb and occupies a variety of critical habitats impacted by human activity. Blue crabs exhibit a complex life history, disperse between estuarine and marine habitats, ...

The National Marine Fisheries Service's Alaska Fisheries Science Center uses the NOAA Technical Memorandum series to issue informal scientific and technical publications when complete formal review and editorial processing are not appropriate or feasible. Documents within this series reflect sound professional work and may be referenced in the formal scientific and technical literature. Use of ...

If approved by the Secretary, proposed Amendment 108 to the BSAI FMP, proposed Amendment 100 to the GOA FMP, and proposed Amendment 46 to the Crab FMP would correct the omissions in each FMP by adding ‘‘or equal to’’ to the length limits. Specifically, these FMP amendments would add vessels 26 ft (7.9 m) LOA in the GOA and vessels 32 ft (9.8 m) LOA in the BSAI, including BSAI Crab, to the LLP e...

The role of predation in structuring soft-sediment communities varies as a function of the number and composition of predators that co-occur in a given habitat. In Bonne Bay, Newfoundland, contrasting abundances or predators in different areas of the bay may contribute to different regulatory roles of predators on infauna. To test this hypothesis, results from a field exclusion experiment were ...

Size selection in commercial snow crab (Chionoecetes opilio) pot fisheries is important for reducing on-board sorting and unintended mortality of undersized individuals. In this paper, we tested whether various sizes geometrically could pass through diamond meshes different opening angles, to estimate a model predicting the effect mesh size angle on selectivity. The was able explain results fro...