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Prosomal-width-to-weight relationships in American horseshoe crabs (Limulus polyphemus): examining conversion factors used to estimate landings

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dc.contributorVirginia Techen
dc.contributor.authorGraham, Larissa Joyen
dc.contributor.authorBotton, Mark L.en
dc.contributor.authorHata, Daviden
dc.contributor.authorLoveland, Robert E.en
dc.contributor.authorMurphy, Brian R.en
dc.contributor.departmentFish and Wildlife Conservationen
dc.date.accessed2014-05-12en
dc.date.accessioned2014-05-14T14:36:49Zen
dc.date.available2014-05-14T14:36:49Zen
dc.date.issued2009-04en
dc.description.abstractHorseshoe crabs (Limulus polyphemus) are valued by many stakeholders, including the commercial fishing industry, biomedical companies, and environmental interest groups. We designed a study to test the accuracy of the conversion factors that were used by NOAA Fisheries and state agencies to estimate horseshoe crab landings before mandatory reporting that began in 1998. Our results indicate that the NOAA Fisheries conversion factor consistently overestimates the weight of male horseshoe crabs, particularly those from New England populations. Because of the inaccuracy of this and other conversion factors, states are now mandated to report the number (not biomass) and sex of landed horseshoe crabs. However, accurate estimates of biomass are still necessary for use in prediction models that are being developed to better manage the horseshoe crab fishery. We recommend that managers use the conversion factors presented in this study to convert current landing data from numbers to biomass of harvested horseshoe crabs for future assessments.en
dc.identifier.citationGraham, Larissa J. and Botton, Mark L. and Hata, David and Loveland, Robert E. and Murphy, Brian R. (2009). "Prosomal-width-to-weight relationships in American horseshoe crabs (Limulus polyphemus): examining conversion factors used to estimate landings," Fishery Bulletin, 107(2), pp. 235-243. http://fishbull.noaa.gov/1072/graham.pdfen
dc.identifier.issn0090-0656en
dc.identifier.urihttp://hdl.handle.net/10919/48013en
dc.identifier.urlhttp://fishbull.noaa.gov/1072/graham.pdfen
dc.language.isoen_USen
dc.publisherNational Marine Fisheries Service Scientific Publication Officeen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectdelaware bayen
dc.subjectcape-coden
dc.subjectmovement patternsen
dc.subjectmassachusettsen
dc.subjecteggsen
dc.subjectpopulationsen
dc.subjectmortalityen
dc.subjectblooden
dc.subjectusaen
dc.subjectfisheriesen
dc.titleProsomal-width-to-weight relationships in American horseshoe crabs (Limulus polyphemus): examining conversion factors used to estimate landingsen
dc.title.serialFishery Bulletinen
dc.typeArticleen

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