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

Resilience Across Generations: Explo...

Genovese, Caitlyn.

Linked to FindBook

Google Book

Amazon

博客來

Resilience Across Generations: Exploring Transgenerational and Larval Acclimation to Thermal Stress in the Marine Annelid Hydroides elegans.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Resilience Across Generations: Exploring Transgenerational and Larval Acclimation to Thermal Stress in the Marine Annelid Hydroides elegans./
Author:	Genovese, Caitlyn.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2024,
Description:	128 p.
Notes:	Source: Dissertations Abstracts International, Volume: 85-12, Section: B.
Contained By:	Dissertations Abstracts International85-12B.
Subject:	Zoology. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31235613
ISBN:	9798383111659

Resilience Across Generations: Exploring Transgenerational and Larval Acclimation to Thermal Stress in the Marine Annelid Hydroides elegans.
Genovese, Caitlyn.

Resilience Across Generations: Exploring Transgenerational and Larval Acclimation to Thermal Stress in the Marine Annelid Hydroides elegans. - Ann Arbor : ProQuest Dissertations & Theses, 2024 - 128 p.

Source: Dissertations Abstracts International, Volume: 85-12, Section: B.

Thesis (Ph.D.)--University of Hawai'i at Manoa, 2024.

Temperature can have profound impacts on the reproductive and developmental aspects of marine ectotherms. I examined how varying temperatures impact egg size, energy content, larval survival, and settlement dynamics across generations in the marine annelid Hydroides elegans. This work aimed to highlight the adaptive mechanisms marine invertebrates may employ to cope with rapidly changing oceanic temperatures. Through a series of interconnected studies, I explored the phenotypic plasticity of egg characteristics, thermal tolerance of larvae, settlement, and oxygen consumption rates, focusing on the significance of transgenerational and within-generation thermal responses. My first study investigated the effects of maternal rearing temperature on egg size, fecundity, and energy content in the marine annelid Hydroides elegans, a free-spawning benthic annelid invasive to Hawai'i. Results demonstrated that parental rearing temperature significantly affects egg size and fecundity, with cooler temperatures favoring larger eggs and higher fecundity. Interestingly, while egg size typically decreased with increasing temperature, the energy content of the eggs exhibited an inverse relationship, with smaller eggs from warmer temperatures containing more energy as well as higher energy densities This finding challenges the common assumption that larger eggs contain more energy, suggesting that temperature-driven changes in egg size may not align with adaptive responses but rather represent physiological constraints. My second study explored the thermal tolerance and survival strategies in larval stages of the marine annelid Hydroides elegans under varying thermal conditions. We investigated the roles of larval acclimation and maternal effects at different rearing temperatures to understand potential adaptive responses to thermal stress. We found significant effects of larval rearing temperature on thermal tolerance, with higher rearing temperatures generally corresponding to lower LT50 values, suggesting decreased thermal tolerance in larvae that were raised at the highest temperature. Maternal rearing temperature and the interaction between larval and maternal temperatures showed less consistent impacts on larval survival, inconsistent with the hypothesis that transgenerational plasticity significantly enhances thermal tolerance in this species. My final study investigated the influence of transgenerational and larval environmental temperatures on the settlement dynamics and metabolic rates of Hydroides elegans larvae. Conducted across a temperature gradient of 21°C, 25°C, and 29°C, this study examines whether parental exposure to elevated temperatures affects settlement rates and oxygen consumption (proxy for metabolic rate) of offspring. Results indicate day post fertilization was the only factor affecting settlement rate but that larval rearing temperature significantly affects metabolic rates, with larvae at 29°C displaying higher oxygen consumption, suggesting an increase in energy expenditure per unit time. Conversely, parental temperature showed only a marginal influence on larval settlement, with no significant transgenerational effects on metabolic rates.

ISBN: 9798383111659Subjects--Topical Terms:

518878
Zoology.
Subjects--Index Terms:

Egg size

Resilience Across Generations: Exploring Transgenerational and Larval Acclimation to Thermal Stress in the Marine Annelid Hydroides elegans.
LDR:04465nmm a2200409 4500 001 2402088
005 20241028114751.5
006 m o d
007 cr#unu||||||||
008 251215s2024 ||||||||||||||||| ||eng d
020 $a 9798383111659
035 $a (MiAaPQ)AAI31235613
035 $a AAI31235613
035 $a 2402088
040 $a MiAaPQ $c MiAaPQ
100 1 $a Genovese, Caitlyn. $0 (orcid)0009-0009-1352-4798 $3 3772305
245 1 0 $a Resilience Across Generations: Exploring Transgenerational and Larval Acclimation to Thermal Stress in the Marine Annelid Hydroides elegans.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2024
300 $a 128 p.
500 $a Source: Dissertations Abstracts International, Volume: 85-12, Section: B.
500 $a Advisor: Moran, Amy.
502 $a Thesis (Ph.D.)--University of Hawai'i at Manoa, 2024.
520 $a Temperature can have profound impacts on the reproductive and developmental aspects of marine ectotherms. I examined how varying temperatures impact egg size, energy content, larval survival, and settlement dynamics across generations in the marine annelid Hydroides elegans. This work aimed to highlight the adaptive mechanisms marine invertebrates may employ to cope with rapidly changing oceanic temperatures. Through a series of interconnected studies, I explored the phenotypic plasticity of egg characteristics, thermal tolerance of larvae, settlement, and oxygen consumption rates, focusing on the significance of transgenerational and within-generation thermal responses. My first study investigated the effects of maternal rearing temperature on egg size, fecundity, and energy content in the marine annelid Hydroides elegans, a free-spawning benthic annelid invasive to Hawai'i. Results demonstrated that parental rearing temperature significantly affects egg size and fecundity, with cooler temperatures favoring larger eggs and higher fecundity. Interestingly, while egg size typically decreased with increasing temperature, the energy content of the eggs exhibited an inverse relationship, with smaller eggs from warmer temperatures containing more energy as well as higher energy densities This finding challenges the common assumption that larger eggs contain more energy, suggesting that temperature-driven changes in egg size may not align with adaptive responses but rather represent physiological constraints. My second study explored the thermal tolerance and survival strategies in larval stages of the marine annelid Hydroides elegans under varying thermal conditions. We investigated the roles of larval acclimation and maternal effects at different rearing temperatures to understand potential adaptive responses to thermal stress. We found significant effects of larval rearing temperature on thermal tolerance, with higher rearing temperatures generally corresponding to lower LT50 values, suggesting decreased thermal tolerance in larvae that were raised at the highest temperature. Maternal rearing temperature and the interaction between larval and maternal temperatures showed less consistent impacts on larval survival, inconsistent with the hypothesis that transgenerational plasticity significantly enhances thermal tolerance in this species. My final study investigated the influence of transgenerational and larval environmental temperatures on the settlement dynamics and metabolic rates of Hydroides elegans larvae. Conducted across a temperature gradient of 21°C, 25°C, and 29°C, this study examines whether parental exposure to elevated temperatures affects settlement rates and oxygen consumption (proxy for metabolic rate) of offspring. Results indicate day post fertilization was the only factor affecting settlement rate but that larval rearing temperature significantly affects metabolic rates, with larvae at 29°C displaying higher oxygen consumption, suggesting an increase in energy expenditure per unit time. Conversely, parental temperature showed only a marginal influence on larval settlement, with no significant transgenerational effects on metabolic rates.
590 $a School code: 0085.
650 4 $a Zoology. $3 518878
650 4 $a Aquatic sciences. $3 3174300
650 4 $a Biological oceanography. $3 2122748
653 $a Egg size
653 $a Egg energy
653 $a Larval survival
653 $a Oxygen consumption
653 $a Settlement
653 $a Temperature
690 $a 0472
690 $a 0416
690 $a 0792
710 2 $a University of Hawai'i at Manoa. $b Zoology. $3 3284923
773 0 $t Dissertations Abstracts International $g 85-12B.
790 $a 0085
791 $a Ph.D.
792 $a 2024
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31235613