Retrospective eDNA assessment of potentially harmful algae in historical ship ballast tank and marine port sediments
نویسندگان
چکیده
منابع مشابه
Harmful Algae and Marine Aquaculture in the Northeastern United States
water quality (e.g. low dissolved oxygen; Brunson et al., 1994), interfering with feeding in bivalves (Aureococcus anophagefferens, Tracey, 1988), mechanical injury (Chaetoceros spp., Bruno et al. 1989) and marketability losses due to off-flavors (Tucker, 2000), or toxicity. Toxic algae result in major losses in aquaculture causing mortality in finfish and shellfish operations as a consequence ...
متن کاملHigh colonization and propagule pressure by ship ballast as a vector for the diatom genus Pseudo-nitzschia
Most harmful diatoms belong to the marine, planktonic genus Pseudo-nitzschia and are responsible for amnesic shellfish poisoning through the production of domoic acid. Fifteen Pseudo-nitzschia species, nine of them toxigenic (approximately 60% of the species found in our samples) were recovered from 185 ship ballast tanks (water and sediment) destined for Canadian ports. Our results demonstrate...
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testing plays a vital role in any language teaching program. it allows teachers and stakeholders, including program administrators, parents, admissions officers and prospective employers to be assured that the learners are progressing according to an accepted standard (douglas, 2010). the problems currently facing language testers have both practical and theoretical implications but the first i...
a fundamental study of "histiriographic metafiction", and "literary genres", as introduced in "new historical philosophy", and tracing them in the works of julian barnes.
abstract a fundamental study of “historio-graphic metafiction” and “literary genres”, as introduced in “new historical philosophy”, and tracing them in the works of julian barnes having studied the two novels, the porcupine and arthur & george, by julian barnes, the researcher has applied linda hutcheon’s historio-graphic metafictional theories to them. the thesis is divided into five cha...
15 صفحه اولpatterns and variations in native and non-native interlanguage pragmatic rating: effects of rater training, intercultural proficiency, and self-assessment
although there are studies on pragmatic assessment, to date, literature has been almost silent about native and non-native english raters’ criteria for the assessment of efl learners’ pragmatic performance. focusing on this topic, this study pursued four purposes. the first one was to find criteria for rating the speech acts of apology and refusal in l2 by native and non-native english teachers...
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ژورنال
عنوان ژورنال: Molecular Ecology
سال: 2019
ISSN: 0962-1083,1365-294X
DOI: 10.1111/mec.15055