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Understanding the Effects of Tempera...

Trainer, Sivanna Quinn,

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Understanding the Effects of Temperature Stress and Disease on Bay Scallop Argopecten irradians Health and Physiology /

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Understanding the Effects of Temperature Stress and Disease on Bay Scallop Argopecten irradians Health and Physiology // Sivanna Quinn Trainer.
作者:	Trainer, Sivanna Quinn,
面頁冊數:	1 electronic resource (89 pages)
附註:	Source: Masters Abstracts International, Volume: 85-12.
Contained By:	Masters Abstracts International85-12.
標題:	Ecology. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31297131
ISBN:	9798382837192

Understanding the Effects of Temperature Stress and Disease on Bay Scallop Argopecten irradians Health and Physiology /
Trainer, Sivanna Quinn,

Understanding the Effects of Temperature Stress and Disease on Bay Scallop Argopecten irradians Health and Physiology /Sivanna Quinn Trainer. - 1 electronic resource (89 pages)

Source: Masters Abstracts International, Volume: 85-12.

Scallops are ecologically and economically important bivalves facing increasing threats from warming and disease outbreaks related to climate change. Mass mortality events of adult northern bay scallop, Argopecten irradians irradians, have been reported in New York every summer since 2019. These events are attributed to heavy infection by an apicomplexan parasite dubbed Bay Scallop Marosporida (BSM) occurring in conjunction with warm temperature anomalies. The purpose of this study was to further understand the link between temperature and disease stress on Argopecten irradians physiology, health, and survival. Additionally, the work explored how these traits vary between scallop lines from different origins and exposed to different environmental conditions.First, lab experiments were implemented to examine the relationship between seasonal temperatures, disease progression and scallop survival. Scallops were exposed to different temperature regimes including natural seasonal (January-July) fluctuations of temperatures as well as moderate warming or cooling of seawater to capture past (-2.5ºC) and future (+2.5ºC) temperature conditions.Throughout this period, scallops were monitored for a minimum of three months spanning late spring and early summer to assess mortality and disease. Water and biodeposit samples were also collected to understand the impact of temperature on parasite release into the surrounding environment, if any. Parasite loads in scallop tissues were found to peak in early June in the hot treatment, followed by the ambient treatment, and the cold treatment that peaked at the end of June. Peaks in parasite loads were closely linked to increased mortality in all treatments. Under warming conditions scallops had significantly lower survivorship, while the cold treatment displayed the lowest mortality. These results suggest that warm temperature anomalies during spring and early summer represent a major factor regulating parasite development, and consequently disease and mortality outbreaks in Peconic Bay scallops. Additionally, the positive relationship between BSM infection in the scallop kidney and the environmental samples may indicate periods of parasite release. To complement these investigations, comparative studies on scallop physiology were proposed to determine how heat stress impacts scallops derived from different geographical origins ranging from Massachusetts to Virginia. Results suggested scallops from all origins were impacted by heat stress in one or more physiological responses. Massachusetts scallops were most severely impacted, and Virginia scallops exhibited less severe effects, highlighting regional differences in adaptation to warm conditions. Our findings underline the need for comprehensive research efforts and management strategies to better understand local adaptations, and disease and stress tolerance, to protect and enhance scallop populations in the face of ongoing climate change and disease pressure.

English

ISBN: 9798382837192Subjects--Topical Terms:

516476
Ecology.
Subjects--Index Terms:

Bay Scallop Marosporida

Understanding the Effects of Temperature Stress and Disease on Bay Scallop Argopecten irradians Health and Physiology /
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520 $a Scallops are ecologically and economically important bivalves facing increasing threats from warming and disease outbreaks related to climate change. Mass mortality events of adult northern bay scallop, Argopecten irradians irradians, have been reported in New York every summer since 2019. These events are attributed to heavy infection by an apicomplexan parasite dubbed Bay Scallop Marosporida (BSM) occurring in conjunction with warm temperature anomalies. The purpose of this study was to further understand the link between temperature and disease stress on Argopecten irradians physiology, health, and survival. Additionally, the work explored how these traits vary between scallop lines from different origins and exposed to different environmental conditions.First, lab experiments were implemented to examine the relationship between seasonal temperatures, disease progression and scallop survival. Scallops were exposed to different temperature regimes including natural seasonal (January-July) fluctuations of temperatures as well as moderate warming or cooling of seawater to capture past (-2.5ºC) and future (+2.5ºC) temperature conditions.Throughout this period, scallops were monitored for a minimum of three months spanning late spring and early summer to assess mortality and disease. Water and biodeposit samples were also collected to understand the impact of temperature on parasite release into the surrounding environment, if any. Parasite loads in scallop tissues were found to peak in early June in the hot treatment, followed by the ambient treatment, and the cold treatment that peaked at the end of June. Peaks in parasite loads were closely linked to increased mortality in all treatments. Under warming conditions scallops had significantly lower survivorship, while the cold treatment displayed the lowest mortality. These results suggest that warm temperature anomalies during spring and early summer represent a major factor regulating parasite development, and consequently disease and mortality outbreaks in Peconic Bay scallops. Additionally, the positive relationship between BSM infection in the scallop kidney and the environmental samples may indicate periods of parasite release. To complement these investigations, comparative studies on scallop physiology were proposed to determine how heat stress impacts scallops derived from different geographical origins ranging from Massachusetts to Virginia. Results suggested scallops from all origins were impacted by heat stress in one or more physiological responses. Massachusetts scallops were most severely impacted, and Virginia scallops exhibited less severe effects, highlighting regional differences in adaptation to warm conditions. Our findings underline the need for comprehensive research efforts and management strategies to better understand local adaptations, and disease and stress tolerance, to protect and enhance scallop populations in the face of ongoing climate change and disease pressure.
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