环境对受上升流影响的沿海泻湖中太平洋牡蛎(Crassostrea gigas)整个养殖周期的摄食和生物沉积率的影响

IF 2.3 3区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
G. Samperio-Ramos, C. Vidal-Nieves, Z. García-Esquivel, S. Z. Herzka, J. M. Sandoval-Gil, V. F. Camacho-Ibar
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引用次数: 0

摘要

悬浮牡蛎采用生理策略,根据可用的食物资源调整其新陈代谢需求。利用生物沉积法,我们在圣金廷湾(墨西哥)沿海泻湖对四个不同上升流强度的时期(2016 年 5 月、7 月、10 月和 12 月)进行了实地研究,调查了太平洋牡蛎(Crassostrea gigas)的摄食和加工行为。我们计算了整个养殖周期的生理摄食反应,包括清除率(CR)、过滤率(FR)、净有机物摄取率(NOIR)、净有机物吸收率(NOAR)、净有机物选择效率、净吸收效率和氨排泄率(AER)。膳食质量预测因子在总颗粒物质、淤泥的有机成分和叶绿素浓度方面显示出较大的波动。与抽水活动不同的是,FR、NOIR 和 NOAR 与上升流条件有关,与上升流弱的时期相比,在上升流旺季,大吉藻去除的有机悬浮物质多 2 倍,摄取的多 4 倍,同化的多 5 倍。在强烈上升流活动期间,大菱鲆有可能向沉积物沉积近两倍的有机生物沉积物。7月和10月的AER最高,表明季节性温度变化是调节氮代谢的最重要外源因素,即使在亚热带环境中也是如此。此外,我们还建立了一个机理模型,将食物质量预测因子纳入到千头鳕的摄食和加工反应函数中。我们的结论是,沿岸上升流对牡蛎的摄食和加工活动起着重要的自下而上的控制作用,我们的研究结果有助于进一步研究受东部边界流系统影响的海湾的承载能力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Environmental Influence on Feeding and Biodeposition Rates of Pacific Oysters (Crassostrea gigas) Throughout Its Culture Cycle in a Coastal Lagoon with Upwelling Influence

Environmental Influence on Feeding and Biodeposition Rates of Pacific Oysters (Crassostrea gigas) Throughout Its Culture Cycle in a Coastal Lagoon with Upwelling Influence

Suspended oysters employ physiological strategies to adjust their metabolic needs with the available food resources. Using the biodeposition method, the feeding and processing behavior of Pacific oysters (Crassostrea gigas) was investigated with a field study comparing four periods (May, July, October, and December 2016) with different upwelling intensities in the coastal lagoon of San Quintin Bay (Mexico). We calculated physiological feeding responses throughout the culture cycle, including the clearance rate (CR), filtration rate (FR), net organic ingestion rate (NOIR), net organic absorption rate (NOAR), net organic selection efficiency, net absorption efficiency, and the ammonium excretion rate (AER). The dietary quality predictors showed large fluctuations in terms of total particulate material, organic fraction of seston, and chlorophyll concentration. Unlike the pumping activity, FR, NOIR, and NOAR were related to upwelling conditions, and C. gigas removed twofold, ingested fourfold, and assimilated fivefold more of the organic suspended material during the upwelling season compared with periods of weak upwelling. C. gigas showed the potential of depositing nearly twice the organic biodeposits to the sediments during the intense upwelling events. The highest AER was recorded in July and October, suggesting that seasonal temperature variation is the most important exogenous factor regulating nitrogen metabolism, even in a subtropical environment. Also, mechanistic models incorporating dietary quality predictors to the feeding and processing response functions of C. gigas were performed. We conclude that coastal upwelling plays an important bottom-up control on oysters’ feeding and processing activity, and our results facilitate further studies of the carrying capacity of embayments influenced by eastern boundary current systems.

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来源期刊
Estuaries and Coasts
Estuaries and Coasts 环境科学-海洋与淡水生物学
CiteScore
5.60
自引率
11.10%
发文量
107
审稿时长
12-24 weeks
期刊介绍: Estuaries and Coasts is the journal of the Coastal and Estuarine Research Federation (CERF). Begun in 1977 as Chesapeake Science, the journal has gradually expanded its scope and circulation. Today, the journal publishes scholarly manuscripts on estuarine and near coastal ecosystems at the interface between the land and the sea where there are tidal fluctuations or sea water is diluted by fresh water. The interface is broadly defined to include estuaries and nearshore coastal waters including lagoons, wetlands, tidal fresh water, shores and beaches, but not the continental shelf. The journal covers research on physical, chemical, geological or biological processes, as well as applications to management of estuaries and coasts. The journal publishes original research findings, reviews and perspectives, techniques, comments, and management applications. Estuaries and Coasts will consider properly carried out studies that present inconclusive findings or document a failed replication of previously published work. Submissions that are primarily descriptive, strongly place-based, or only report on development of models or new methods without detailing their applications fall outside the scope of the journal.
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