Andrea K. Johnson

ORCID: 0000-0001-7642-983X
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About
Contact & Profiles
Research Areas
  • Reproductive biology and impacts on aquatic species
  • Marine and fisheries research
  • Fish Ecology and Management Studies
  • Aquaculture Nutrition and Growth
  • Marine Bivalve and Aquaculture Studies
  • Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
  • Marine and coastal ecosystems
  • Water Quality Monitoring Technologies
  • Eicosanoids and Hypertension Pharmacology
  • Mercury impact and mitigation studies
  • Drug-Induced Hepatotoxicity and Protection
  • Isotope Analysis in Ecology
  • Metabolomics and Mass Spectrometry Studies
  • Advances in Oncology and Radiotherapy
  • Identification and Quantification in Food
  • Nursing Education, Practice, and Leadership
  • Aquatic Ecosystems and Biodiversity
  • Geology and Paleoclimatology Research
  • Fish Biology and Ecology Studies
  • Heavy Metal Exposure and Toxicity
  • Heavy metals in environment

University of Maryland Eastern Shore
2006-2018

Minnesota Sea Grant
2016

University of Minnesota, Duluth
2016

Rensselaer Polytechnic Institute
2016

Zhejiang Ocean University
2016

Zhejiang University
2016

University of Hyogo
2016

U.S. National Science Foundation
2016

University of Rhode Island
2016

University of Southern California Sea Grant
2016

In a field population of the protogynous red grouper Epinephelus morio in eastern Gulf Mexico, females with oocytes at all stages development were collected during spawning season suggesting that several batches may be released over period. Plasma oestradiol (E2) levels highest ripe whose gonads contained both cortical alveoli and vitellogenic breeding season. Males still spermiating as late August, although androgens 11-ketotestosterone (11-KT) testosterone (T) had declined from their peaks...

10.1006/jfbi.1997.0598 article EN Journal of Fish Biology 1998-03-01

The absolute light sensitivities, temporal properties, and spectral sensitivities of the visual systems three mid-Atlantic temperate reef fishes (Atlantic spadefish [Ephippidae: Chaetodipterus faber], tautog [Labridae: Tautoga onitis], black sea bass [Serranidae: Centropristis striata]) were studied via electroretinography (ERG). Pelagic Atlantic exhibited higher resolution but a narrower dynamic range than two more demersal foragers. luminous similar to other benthic coastal fishes. Flicker...

10.1242/bio.20136825 article EN cc-by Biology Open 2013-11-06

Abstract Johnson, A. K., Richards, R. A., Cullen, D. W., and Sutherland, S. J. 2008. Growth, reproduction, feeding of large monkfish, Lophius americanus. – ICES Journal Marine Science, 65: 1306–1315. The American americanus, supports important commercial fisheries in the Northwest Atlantic. Although life history information is available for smaller L. biology monkfish (>70 cm) poorly understood because relatively few fish are caught standard resource surveys. Between 2006 2008, 699...

10.1093/icesjms/fsn138 article EN ICES Journal of Marine Science 2008-09-08

To improve knowledge of goosefish Lophius americanus' reproductive biology, females were collected during 2009-2012 from the Mid-Atlantic Bight shelf region U.S. east coast. Batch fecundity increased with total length (LT ), 229 100 to 2 243 300 mature oocytes per female range: 55·5-112 cm; n = 54). This estimate at LT is lower than one derived a sample 1982-1985. Examination whole oocyte diameters in different months indicated that L. americanus serial spawner, releasing more egg veil...

10.1111/jfb.13272 article EN Journal of Fish Biology 2017-02-23

ASLO is very fortunate in that we have a high (>30%) contingent of “young” (by career stage) members, which part the reason has such tremendous fidelity. One ASLO's core missions to foster professional development our members at range stages and this goal permeates new strategic plan, with key goals including professionalization vitality. The board been supportive both student EC funds travel awards workshops, amongst other opportunities. Student Early Career are outstanding participants...

10.1002/lob.10052 article EN Limnology and Oceanography Bulletin 2015-07-29

Abstract Histological examination of ovarian morphology was conducted on the monkfish, Lophius americanus . The ovary is cystovarian type, that is, with a lumen. However, quite unique, compared to other fishes, in lamellae only originate along ventral wall rather than around periphery. They may branch at their base, but are otherwise unbranching. Furthermore, germinal epithelium site germ cell production, described for first time L. uniquely restricted base each being distributed lamellar...

10.1002/jmor.20910 article EN Journal of Morphology 2018-11-15

ABSTRACT We previously reported that splenic extract from lipopolysaccharide (LPS)‐challenged guinea pigs inhibits the exaggerated febrile response of splenectomized pigs, suggesting spleen generates an inhibitory factor. Earlier results indicate factor is a lipid. In effort to identify this factor, lipid fractions, isolated extracts control and LPS‐challenged were analyzed with emphasis on identifying quantifying prostanoids, which according current knowledge are likely bioactive factors....

10.1002/bmc.2789 article EN Biomedical Chromatography 2012-09-12

ASLO provides numerous workshops and networking opportunities for early career student members at its meetings. With strong support from the Board, Early Career Committee helps promote professional development of (i.e., within 10 yr Ph.D. completion) by developing hosting developmental tailored to aspirations (Menden-Deuer et al. 2015). Workshop convened during 2016 Summer Meeting on 6 June in Santa Fe, NM, USA. Panelists included (seated left right) Linda Duguay (University Southern...

10.1002/lob.10143 article EN Limnology and Oceanography Bulletin 2016-09-15
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