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Sourcing and Evaluating the Use of D...

Both, Adrianus.

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Sourcing and Evaluating the Use of Detritus as a Supplementary Diet for Bivalve Aquaculture Using Stable Isotopes and Fatty Acid Biomarkers.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Sourcing and Evaluating the Use of Detritus as a Supplementary Diet for Bivalve Aquaculture Using Stable Isotopes and Fatty Acid Biomarkers./
作者:	Both, Adrianus.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
面頁冊數:	141 p.
附註:	Source: Dissertations Abstracts International, Volume: 82-02, Section: B.
Contained By:	Dissertations Abstracts International82-02B.
標題:	Aquatic sciences. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28064094
ISBN:	9798662426962

Sourcing and Evaluating the Use of Detritus as a Supplementary Diet for Bivalve Aquaculture Using Stable Isotopes and Fatty Acid Biomarkers.
Both, Adrianus.

Sourcing and Evaluating the Use of Detritus as a Supplementary Diet for Bivalve Aquaculture Using Stable Isotopes and Fatty Acid Biomarkers. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 141 p.

Source: Dissertations Abstracts International, Volume: 82-02, Section: B.

Thesis (Ph.D.)--The University of Maine, 2020.

This item must not be sold to any third party vendors.

Detritus is a ubiquitous component of ecosystems and an important fuel for secondary production. Due to the extractive nature of bivalve aquaculture, detritus is often incorporated into carrying capacity and growth models for cultured bivalves. However, despite the complexity and difficulty in obtaining direct measurements, detritus is often treated as a homogeneous food source in models. Further understanding the role detritus plays in the diet of cultured bivalves could lead to more comprehensive and accurate models as well as more informed site selection for growers. The purpose of this study was to assess the abundance, bioavailability, and contribution of detritus to the diet of a commercially important bivalve (Mytilus edulis) in a northern temperate bay (Saco Bay, ME USA) using a combination of lipid fatty acid biomarkers and stable isotopes (δ13C and δ15N). Both macroalgal (6.9 ± 0.1%) and vascular plant (4.8 ± 0.1%) detritus contributed to the particulate organic matter of Saco Bay and could supplement essential fatty acids (FA) or their precursors to consumers able to digest them. Mussels in Saco Bay may have been limited by the availability of the essential fatty acid 20:5ω3 (EPA) and incorporated macroalgal detritus as a small part (5 to 11%) of their diet. Macroalgae contained large proportions of the essential FAs 20:4ω6 (7 to 18%) and 20:5ω3 (8 to 25%) which may supplement the dietary needs of mussels. The original source of primary production had more influence on the bioavailability of lipid and FAs than the state of decay. The bioavailability of lipid and FAs from Ascophyllum nodosum (9 ± 3%) was significantly lower than that of Spartina alterniflora (56 ± 19%) and Isochrysis galbana (48 ± 2%), likely due to the presence of polyphenols and structural alginates that interfered with lipid solubilization. Although it contains essential FAs and its contribution into the diet of M. edulis suggest macroalgae could be a good supplemental diet for bivalve aquaculture, the concentration of secondary metabolites (>3% wt/wt) and alginates needs to be considered due to their anti-nutritional effects.

ISBN: 9798662426962Subjects--Topical Terms:

3174300
Aquatic sciences.
Subjects--Index Terms:

Detritus

Sourcing and Evaluating the Use of Detritus as a Supplementary Diet for Bivalve Aquaculture Using Stable Isotopes and Fatty Acid Biomarkers.
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520 $a Detritus is a ubiquitous component of ecosystems and an important fuel for secondary production. Due to the extractive nature of bivalve aquaculture, detritus is often incorporated into carrying capacity and growth models for cultured bivalves. However, despite the complexity and difficulty in obtaining direct measurements, detritus is often treated as a homogeneous food source in models. Further understanding the role detritus plays in the diet of cultured bivalves could lead to more comprehensive and accurate models as well as more informed site selection for growers. The purpose of this study was to assess the abundance, bioavailability, and contribution of detritus to the diet of a commercially important bivalve (Mytilus edulis) in a northern temperate bay (Saco Bay, ME USA) using a combination of lipid fatty acid biomarkers and stable isotopes (δ13C and δ15N). Both macroalgal (6.9 ± 0.1%) and vascular plant (4.8 ± 0.1%) detritus contributed to the particulate organic matter of Saco Bay and could supplement essential fatty acids (FA) or their precursors to consumers able to digest them. Mussels in Saco Bay may have been limited by the availability of the essential fatty acid 20:5ω3 (EPA) and incorporated macroalgal detritus as a small part (5 to 11%) of their diet. Macroalgae contained large proportions of the essential FAs 20:4ω6 (7 to 18%) and 20:5ω3 (8 to 25%) which may supplement the dietary needs of mussels. The original source of primary production had more influence on the bioavailability of lipid and FAs than the state of decay. The bioavailability of lipid and FAs from Ascophyllum nodosum (9 ± 3%) was significantly lower than that of Spartina alterniflora (56 ± 19%) and Isochrysis galbana (48 ± 2%), likely due to the presence of polyphenols and structural alginates that interfered with lipid solubilization. Although it contains essential FAs and its contribution into the diet of M. edulis suggest macroalgae could be a good supplemental diet for bivalve aquaculture, the concentration of secondary metabolites (>3% wt/wt) and alginates needs to be considered due to their anti-nutritional effects.
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