東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Climate Change and an Evolving Fishe...

Ascher, Alexander J.

Linked to FindBook

Google Book

Amazon

博客來

Climate Change and an Evolving Fishery: Do Declining Maternal Size and Planktonic Foods Affect Lobster Larval Survival in the Gulf of Maine?

Record Type:	Electronic resources : Monograph/item
Title/Author:	Climate Change and an Evolving Fishery: Do Declining Maternal Size and Planktonic Foods Affect Lobster Larval Survival in the Gulf of Maine?/
Author:	Ascher, Alexander J.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2023,
Description:	178 p.
Notes:	Source: Dissertations Abstracts International, Volume: 85-04, Section: A.
Contained By:	Dissertations Abstracts International85-04A.
Subject:	Plankton. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30667073
ISBN:	9798380488716

Climate Change and an Evolving Fishery: Do Declining Maternal Size and Planktonic Foods Affect Lobster Larval Survival in the Gulf of Maine?
Ascher, Alexander J.

Climate Change and an Evolving Fishery: Do Declining Maternal Size and Planktonic Foods Affect Lobster Larval Survival in the Gulf of Maine? - Ann Arbor : ProQuest Dissertations & Theses, 2023 - 178 p.

Source: Dissertations Abstracts International, Volume: 85-04, Section: A.

Thesis (Ph.D.)--The University of Maine, 2023.

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

Many marine organisms exhibit bipartite life-cycles whereby reproductive adults dwell on the benthos while the larvae are pelagic. The pelagic stage is subject to mortality rates which far exceed those experienced by the organism during its benthic existence. The larval phase therefore represents an important bottleneck to larval recruitment. Small changes to survivorship in the plankton can have large consequences for subsequent year-class strength. Understanding the factors influencing successful larval recruitment is an important step towards predicting future stock abundances and maintaining healthy fisheries.The American lobster (Homarus americanus) is a large benthic crustacean which is economically and culturally important in the Gulf of Maine. In the past few decades lobster broodstock abundance and egg production has soared, but young-of-year recruitment to benthic nurseries has declined. This suggests a breakdown in the spawner-recruit relationship due to changes in the factors that control larval survival and recruitment success. In this dissertation, I have investigated potential intrinsic and extrinsic sources of variation to larval survival, which may be responsible for declining lobster benthic recruitment.Body size is an important intrinsic trait that affects both larval production and survival. Ongoing warming within the Gulf of Maine has led to earlier maturation of female lobsters at smaller sizes. Smaller females were found to produce fewer, lower quality larvae. Meanwhile, food-limitation is an important extrinsic source of larval mortality. Warming-induced changes to zooplankton regimes could put planktivorous lobster larvae at increased risk of food-limitation, as suggested by recent correlative evidence. Results presented here suggest that risk of foodlimitation coupled with declining maternal size interact to lead to lower recruitment success for lobster larvae.Larval ecology is frequently termed a 'black box' due to the difficulties associated with studying small dispersive larvae. This dissertation seeks to surmount these difficulties through the use of mixed-methodologies and a combination of laboratory and field-based approaches. The overarching goal of this research is to further understanding of lobster larval recruitment and ecology while demonstrating the efficacy of new tools that, when paired with traditional approaches, help to shine a brighter light on the larval 'black box.

ISBN: 9798380488716Subjects--Topical Terms:

1299572
Plankton.

Climate Change and an Evolving Fishery: Do Declining Maternal Size and Planktonic Foods Affect Lobster Larval Survival in the Gulf of Maine?
LDR:03735nmm a2200409 4500 001 2393384
005 20240315085552.5
006 m o d
007 cr#unu||||||||
008 251215s2023 ||||||||||||||||| ||eng d
020 $a 9798380488716
035 $a (MiAaPQ)AAI30667073
035 $a (MiAaPQ)U_Maine4838
035 $a AAI30667073
040 $a MiAaPQ $c MiAaPQ
100 1 $a Ascher, Alexander J. $3 3762841
245 1 0 $a Climate Change and an Evolving Fishery: Do Declining Maternal Size and Planktonic Foods Affect Lobster Larval Survival in the Gulf of Maine?
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2023
300 $a 178 p.
500 $a Source: Dissertations Abstracts International, Volume: 85-04, Section: A.
500 $a Advisor: Wahle, Richard A.;Fields, David M.
502 $a Thesis (Ph.D.)--The University of Maine, 2023.
506 $a This item must not be sold to any third party vendors.
520 $a Many marine organisms exhibit bipartite life-cycles whereby reproductive adults dwell on the benthos while the larvae are pelagic. The pelagic stage is subject to mortality rates which far exceed those experienced by the organism during its benthic existence. The larval phase therefore represents an important bottleneck to larval recruitment. Small changes to survivorship in the plankton can have large consequences for subsequent year-class strength. Understanding the factors influencing successful larval recruitment is an important step towards predicting future stock abundances and maintaining healthy fisheries.The American lobster (Homarus americanus) is a large benthic crustacean which is economically and culturally important in the Gulf of Maine. In the past few decades lobster broodstock abundance and egg production has soared, but young-of-year recruitment to benthic nurseries has declined. This suggests a breakdown in the spawner-recruit relationship due to changes in the factors that control larval survival and recruitment success. In this dissertation, I have investigated potential intrinsic and extrinsic sources of variation to larval survival, which may be responsible for declining lobster benthic recruitment.Body size is an important intrinsic trait that affects both larval production and survival. Ongoing warming within the Gulf of Maine has led to earlier maturation of female lobsters at smaller sizes. Smaller females were found to produce fewer, lower quality larvae. Meanwhile, food-limitation is an important extrinsic source of larval mortality. Warming-induced changes to zooplankton regimes could put planktivorous lobster larvae at increased risk of food-limitation, as suggested by recent correlative evidence. Results presented here suggest that risk of foodlimitation coupled with declining maternal size interact to lead to lower recruitment success for lobster larvae.Larval ecology is frequently termed a 'black box' due to the difficulties associated with studying small dispersive larvae. This dissertation seeks to surmount these difficulties through the use of mixed-methodologies and a combination of laboratory and field-based approaches. The overarching goal of this research is to further understanding of lobster larval recruitment and ecology while demonstrating the efficacy of new tools that, when paired with traditional approaches, help to shine a brighter light on the larval 'black box.
590 $a School code: 0113.
650 4 $a Plankton. $3 1299572
650 4 $a Food. $3 551593
650 4 $a Investments. $3 566987
650 4 $a Success. $3 518195
650 4 $a Fatty acids. $3 897910
650 4 $a Diet. $3 626002
650 4 $a Metabolism. $3 541349
650 4 $a Lipids. $3 558980
650 4 $a Climate change. $2 bicssc $3 2079509
650 4 $a Predation. $3 3562921
650 4 $a Endangered & extinct species. $3 3560222
650 4 $a Shellfish. $3 2147548
650 4 $a Invertebrates. $3 600655
650 4 $a Taxonomy. $3 3556303
650 4 $a Crustaceans. $3 3548330
650 4 $a Fishing. $3 566322
650 4 $a Fisheries management. $3 3558781
650 4 $a Extinction. $3 3685255
650 4 $a Fish. $3 3564374
650 4 $a Animal reproduction. $3 3680772
650 4 $a Animal sciences. $3 3174829
650 4 $a Aquatic sciences. $3 3174300
650 4 $a Biological oceanography. $3 2122748
650 4 $a Microbiology. $3 536250
650 4 $a Recreation. $3 535376
650 4 $a Wildlife conservation. $2 fast $3 542165
690 $a 0404
690 $a 0475
690 $a 0792
690 $a 0416
690 $a 0474
690 $a 0410
690 $a 0814
690 $a 0284
710 2 $a The University of Maine. $3 1029373
773 0 $t Dissertations Abstracts International $g 85-04A.
790 $a 0113
791 $a Ph.D.
792 $a 2023
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30667073