東華大學圖書館 |

Co-Occurring Hab Species and Phycotoxins : = Interactions with Oysters.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Co-Occurring Hab Species and Phycotoxins :/
其他題名:	Interactions with Oysters.
作者:	Pease, Sarah Krystal Desautels.
面頁冊數:	1 online resource (253 pages)
附註:	Source: Dissertations Abstracts International, Volume: 83-05, Section: B.
Contained By:	Dissertations Abstracts International83-05B.
標題:	Ecology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28773045click for full text (PQDT)
ISBN:	9798492744410

Co-Occurring Hab Species and Phycotoxins : = Interactions with Oysters.
Pease, Sarah Krystal Desautels.

Co-Occurring Hab Species and Phycotoxins :Interactions with Oysters. - 1 online resource (253 pages)

Source: Dissertations Abstracts International, Volume: 83-05, Section: B.

Thesis (Ph.D.)--The College of William and Mary, 2022.

Includes bibliographical references

Harmful algal bloom (HAB) events are generally marked by the over-abundance of one particular HAB species. Co-occurrence of multiple HAB species or HAB toxins, especially at low cell or toxin concentrations, is common. While much research has been dedicated to understanding the detrimental effects of individual HAB species and toxins on human health and the environment, implications of HAB co-occurrence for seafood safety and shellfish health are poorly understood.Oysters support economically-valuable fisheries and aquaculture worldwide, however, oysters encounter co-occurring HAB species and toxins in their environment. Some HAB species and toxins are harmful to oyster health, harming the immune system, reducing feeding rates, or causing mortalities. Additionally, oysters co-accumulate HAB toxins; some associated with human health syndromes, such as diarrhetic shellfish poisoning. To support productive and safe oyster industries, the effects of co-occurring HAB species and toxins on larval oyster health, and the bioaccumulation of multiple toxins in adult oysters in the Chesapeake Bay, were investigated.The health and survival of larval oysters is paramount to shellfish productivity. Individual and combined effects of co-occurring HAB species and toxins were assessed using multiple series of 96-h bioassays with larval oysters; larval inactivity and mortality were measured throughout. Karlodinium veneficum and Prorocentrum cordatum are co-occurring HAB species associated with shellfish health issues. Independently, low cell concentrations of either species caused larval inactivity. Additionally, K. veneficum swarmed larvae and caused significant larval mortalities. The co-occurrence of P. cordatum did not alter the larval effects of K. veneficum. Separate bioassays examined co-occurring Alexandrium catenella and Dinophysis acuminata, and associated toxins: saxitoxin (STX), okadaic acid (OA), and pectenotoxin-2 (PTX2). Exposure to live A. catenella caused larval inactivity, while exposure to either species caused larval mortalities. Exposure to D. acuminata lysate or PTX2 also caused larval mortalities, with A. catenella lysate, STX, and OA exhibiting no significant larval inactivity or mortalities. Larval effects during lysate or toxin co-exposure were driven by D. acuminata lysate or PTX2, respectively. In both bioassays, the observed larval effects of co-exposure were driven by one HAB species or toxin.To inform seafood safety management, baseline HAB toxin data from Chesapeake Bay adult oysters were collected over two years. Azaspiracids (AZA1, AZA2), domoic acid (DA), OA, dinophysistoxin-1 (DTX1), PTX2, karlotoxins (KmTx1-1, KmTx1-3), goniodomin A (GDA), and microcystins (MC-RR, MC-YR) were detected in oysters. Regulated toxins were well below seafood safety limits, however, the presence of hepatotoxic, freshwater MCs in estuarine oysters reflects an urgent need for regulation of these toxins in seafood. Co-accumulation of toxins was common. Furthermore, solid phase adsorption toxin tracking devices (SPATTs) were co-deployed with oysters to assess additional methods of toxin monitoring. SPATTs provided additional toxin data that complemented, but could not replace oyster toxin data.As HAB species ranges shift and the need for sustainable shellfish aquaculture increases, so too does the need for understanding combined effects of HABs on shellfish, and the potential for toxin co-accumulation within shellfish. Regional and species-specific studies like these can inform and enhance HAB monitoring, mitigation, and management strategies.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798492744410Subjects--Topical Terms:

516476
Ecology.
Subjects--Index Terms:

Chesapeake BayIndex Terms--Genre/Form:

542853
Electronic books.

Co-Occurring Hab Species and Phycotoxins : = Interactions with Oysters.
LDR:04994nmm a2200409K 4500 001 2354830
005 20230505090433.5
006 m o d
007 cr mn ---uuuuu
008 241011s2022 xx obm 000 0 eng d
020 $a 9798492744410
035 $a (MiAaPQ)AAI28773045
035 $a AAI28773045
040 $a MiAaPQ $b eng $c MiAaPQ $d NTU
100 1 $a Pease, Sarah Krystal Desautels. $3 3695204
245 1 0 $a Co-Occurring Hab Species and Phycotoxins : $b Interactions with Oysters.
264 0 $c 2022
300 $a 1 online resource (253 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertations Abstracts International, Volume: 83-05, Section: B.
500 $a Advisor: Smith, Juliette L.
502 $a Thesis (Ph.D.)--The College of William and Mary, 2022.
504 $a Includes bibliographical references
520 $a Harmful algal bloom (HAB) events are generally marked by the over-abundance of one particular HAB species. Co-occurrence of multiple HAB species or HAB toxins, especially at low cell or toxin concentrations, is common. While much research has been dedicated to understanding the detrimental effects of individual HAB species and toxins on human health and the environment, implications of HAB co-occurrence for seafood safety and shellfish health are poorly understood.Oysters support economically-valuable fisheries and aquaculture worldwide, however, oysters encounter co-occurring HAB species and toxins in their environment. Some HAB species and toxins are harmful to oyster health, harming the immune system, reducing feeding rates, or causing mortalities. Additionally, oysters co-accumulate HAB toxins; some associated with human health syndromes, such as diarrhetic shellfish poisoning. To support productive and safe oyster industries, the effects of co-occurring HAB species and toxins on larval oyster health, and the bioaccumulation of multiple toxins in adult oysters in the Chesapeake Bay, were investigated.The health and survival of larval oysters is paramount to shellfish productivity. Individual and combined effects of co-occurring HAB species and toxins were assessed using multiple series of 96-h bioassays with larval oysters; larval inactivity and mortality were measured throughout. Karlodinium veneficum and Prorocentrum cordatum are co-occurring HAB species associated with shellfish health issues. Independently, low cell concentrations of either species caused larval inactivity. Additionally, K. veneficum swarmed larvae and caused significant larval mortalities. The co-occurrence of P. cordatum did not alter the larval effects of K. veneficum. Separate bioassays examined co-occurring Alexandrium catenella and Dinophysis acuminata, and associated toxins: saxitoxin (STX), okadaic acid (OA), and pectenotoxin-2 (PTX2). Exposure to live A. catenella caused larval inactivity, while exposure to either species caused larval mortalities. Exposure to D. acuminata lysate or PTX2 also caused larval mortalities, with A. catenella lysate, STX, and OA exhibiting no significant larval inactivity or mortalities. Larval effects during lysate or toxin co-exposure were driven by D. acuminata lysate or PTX2, respectively. In both bioassays, the observed larval effects of co-exposure were driven by one HAB species or toxin.To inform seafood safety management, baseline HAB toxin data from Chesapeake Bay adult oysters were collected over two years. Azaspiracids (AZA1, AZA2), domoic acid (DA), OA, dinophysistoxin-1 (DTX1), PTX2, karlotoxins (KmTx1-1, KmTx1-3), goniodomin A (GDA), and microcystins (MC-RR, MC-YR) were detected in oysters. Regulated toxins were well below seafood safety limits, however, the presence of hepatotoxic, freshwater MCs in estuarine oysters reflects an urgent need for regulation of these toxins in seafood. Co-accumulation of toxins was common. Furthermore, solid phase adsorption toxin tracking devices (SPATTs) were co-deployed with oysters to assess additional methods of toxin monitoring. SPATTs provided additional toxin data that complemented, but could not replace oyster toxin data.As HAB species ranges shift and the need for sustainable shellfish aquaculture increases, so too does the need for understanding combined effects of HABs on shellfish, and the potential for toxin co-accumulation within shellfish. Regional and species-specific studies like these can inform and enhance HAB monitoring, mitigation, and management strategies.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
650 4 $a Ecology. $3 516476
650 4 $a Aquatic sciences. $3 3174300
650 4 $a Toxicology. $3 556884
653 $a Chesapeake Bay
653 $a Crassostrea virginica
653 $a Harmful algal bloom
653 $a Larvae
653 $a Oyster
653 $a Phycotoxin
655 7 $a Electronic books. $2 lcsh $3 542853
690 $a 0329
690 $a 0792
690 $a 0383
710 2 $a The College of William and Mary. $b School of Marine Science. $3 3281332
710 2 $a ProQuest Information and Learning Co. $3 783688
773 0 $t Dissertations Abstracts International $g 83-05B.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28773045 $z click for full text (PQDT)