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The Distribution of Horseshoe Crab E...

Bouchard, Elizabeth H.

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The Distribution of Horseshoe Crab Eggs and Marine Infauna Around Intertidal Oyster Farms in Delaware Bay.

Record Type:	Electronic resources : Monograph/item
Title/Author:	The Distribution of Horseshoe Crab Eggs and Marine Infauna Around Intertidal Oyster Farms in Delaware Bay./
Author:	Bouchard, Elizabeth H.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2023,
Description:	128 p.
Notes:	Source: Masters Abstracts International, Volume: 85-05.
Contained By:	Masters Abstracts International85-05.
Subject:	Ecology. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30688915
ISBN:	9798380846929

The Distribution of Horseshoe Crab Eggs and Marine Infauna Around Intertidal Oyster Farms in Delaware Bay.
Bouchard, Elizabeth H.

The Distribution of Horseshoe Crab Eggs and Marine Infauna Around Intertidal Oyster Farms in Delaware Bay. - Ann Arbor : ProQuest Dissertations & Theses, 2023 - 128 p.

Source: Masters Abstracts International, Volume: 85-05.

Thesis (M.S.)--Rutgers The State University of New Jersey, School of Graduate Studies, 2023.

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

To inform management decisions that support both industry and conservation priorities, it is important to understand how aquaculture influences local ecology. Understanding how farms interact with infauna is particularly important because they serve as food for numerous species. Delaware Bay hosts the world's largest spawning population of horseshoe crabs (Limulus polyphemus), and their abundant eggs are a critical food resource for many animals, including fish, gulls, and migratory shorebirds. Other marine infauna (e.g., bivalves, polychaete worms) are also important prey for these animals and the adult horseshoe crabs as well. The resurgent eastern oyster (Crassostrea virginica) aquaculture industry in the Cape Shore region of Delaware Bay may alter prey availability by influencing local infauna. Research shows that oyster farms do not impact horseshoe crab access to spawning beaches; however, they may impact the distribution of eggs or other infauna. In Spring 2021 and 2022, infauna surveys were conducted in four paired farm-control plots (90-m x 180-m) across a 3-km stretch of tidal flats in Delaware Bay. Sediment cores determined the relative abundance of surficial horseshoe crab eggsand other infauna across each plot.Ordination analyses (non-metric multidimensional scaling) clearly showed that infauna vary across the intertidal zone. Horseshoe crab eggs were most abundant overall. They were highly concentrated on the beach and rare across the tidal flats, whereas marine infauna (bivalves, gastropods, polychaete worms, isopods, and amphipods) were more abundant on the tidal flats than the beach. AICc model selection of generalized linear mixed effects models indicated that infauna abundances on the beach were similar in areas with and without oyster farms. Overall, oyster farms do not have a clear effect on the distribution and abundance of horseshoe crab eggs and infauna in the tidal flats. Given the current scale of oyster farming and its associated regulatory framework, intertidal oyster farms do not influence the abundance of horseshoe crab eggs and marine infauna (on the beach and tidal flats) in the Cape Shore region in Delaware Bay. This finding suggests that oyster farms may not impact food availability for horseshoe crabs, federally threatened shorebirds, and other predators.

ISBN: 9798380846929Subjects--Topical Terms:

516476
Ecology.
Subjects--Index Terms:

Aquaculture

The Distribution of Horseshoe Crab Eggs and Marine Infauna Around Intertidal Oyster Farms in Delaware Bay.
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245 1 0 $a The Distribution of Horseshoe Crab Eggs and Marine Infauna Around Intertidal Oyster Farms in Delaware Bay.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2023
300 $a 128 p.
500 $a Source: Masters Abstracts International, Volume: 85-05.
500 $a Advisor: Bushek, David.
502 $a Thesis (M.S.)--Rutgers The State University of New Jersey, School of Graduate Studies, 2023.
506 $a This item must not be sold to any third party vendors.
520 $a To inform management decisions that support both industry and conservation priorities, it is important to understand how aquaculture influences local ecology. Understanding how farms interact with infauna is particularly important because they serve as food for numerous species. Delaware Bay hosts the world's largest spawning population of horseshoe crabs (Limulus polyphemus), and their abundant eggs are a critical food resource for many animals, including fish, gulls, and migratory shorebirds. Other marine infauna (e.g., bivalves, polychaete worms) are also important prey for these animals and the adult horseshoe crabs as well. The resurgent eastern oyster (Crassostrea virginica) aquaculture industry in the Cape Shore region of Delaware Bay may alter prey availability by influencing local infauna. Research shows that oyster farms do not impact horseshoe crab access to spawning beaches; however, they may impact the distribution of eggs or other infauna. In Spring 2021 and 2022, infauna surveys were conducted in four paired farm-control plots (90-m x 180-m) across a 3-km stretch of tidal flats in Delaware Bay. Sediment cores determined the relative abundance of surficial horseshoe crab eggsand other infauna across each plot.Ordination analyses (non-metric multidimensional scaling) clearly showed that infauna vary across the intertidal zone. Horseshoe crab eggs were most abundant overall. They were highly concentrated on the beach and rare across the tidal flats, whereas marine infauna (bivalves, gastropods, polychaete worms, isopods, and amphipods) were more abundant on the tidal flats than the beach. AICc model selection of generalized linear mixed effects models indicated that infauna abundances on the beach were similar in areas with and without oyster farms. Overall, oyster farms do not have a clear effect on the distribution and abundance of horseshoe crab eggs and infauna in the tidal flats. Given the current scale of oyster farming and its associated regulatory framework, intertidal oyster farms do not influence the abundance of horseshoe crab eggs and marine infauna (on the beach and tidal flats) in the Cape Shore region in Delaware Bay. This finding suggests that oyster farms may not impact food availability for horseshoe crabs, federally threatened shorebirds, and other predators.
590 $a School code: 0190.
650 4 $a Ecology. $3 516476
650 4 $a Aquatic sciences. $3 3174300
650 4 $a Biological oceanography. $3 2122748
653 $a Aquaculture
653 $a Atlantic horseshoe crab (Limulus polyphemus)
653 $a Delaware Bay
653 $a Eastern oyster (Crassostrea virginica)
653 $a Intertidal zone
653 $a Marine infauna
690 $a 0329
690 $a 0792
690 $a 0416
710 2 $a Rutgers The State University of New Jersey, School of Graduate Studies. $b Ecology and Evolution. $3 3428820
773 0 $t Masters Abstracts International $g 85-05.
790 $a 0190
791 $a M.S.
792 $a 2023
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30688915