BEGIN:VCALENDAR VERSION:2.0 X-WR-CALNAME:EventsCalendar PRODID:-//hacksw/handcal//NONSGML v1.0//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:America/New_York LAST-MODIFIED:20240422T053451Z TZURL:https://www.tzurl.org/zoneinfo-outlook/America/New_York X-LIC-LOCATION:America/New_York BEGIN:DAYLIGHT TZNAME:EDT TZOFFSETFROM:-0500 TZOFFSETTO:-0400 DTSTART:19700308T020000 RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU END:DAYLIGHT BEGIN:STANDARD TZNAME:EST TZOFFSETFROM:-0400 TZOFFSETTO:-0500 DTSTART:19701101T020000 RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU END:STANDARD END:VTIMEZONE BEGIN:VEVENT CATEGORIES:College of Arts and Sciences,Thesis/Dissertations DESCRIPTION:Advisor: Dr. Robert Drew Committee Members: Dr. Robert Drew, D r. Kenneth Oliveira and Dr. Whitney Hable Abstract: The American eel (Ang uilla rostrata) is a widely distributed catadromous species that undergoes a final metamorphosis from the yellow to silver phase prior to its spawni ng migration to the Sargasso Sea. This silver metamorphosis involves subst antial morphological and physiological changes, yet the life history cues initiating this transition remain uncertain. In this study, age, total len gth, body composition, and energy reserves were examined in yellow and sil ver phase eels from four rivers in Southeastern Massachusetts (Paskamanset t, Acushnet, Mill, and Jones rivers). Percent dry weight was strongly corr elated with energy density across sexes and life stages, and composition o f a standardized body section reliably predicted whole-fish values, indica ting an efficient proxy for energetic assessment. Females migrated at olde r ages and larger sizes than males. Lipid content exceeded protein content at migration for both males and females, suggesting lipid reserves may be important at the onset of silver metamorphosis. Mean minimum lipid conten t was 16.09% for females and 15.03% for males, while energy density did no t differ between sexes. These results suggest that energetic thresholds, p articularly lipid reserves, may play a greater role in triggering silver m etamorphosis than age, sex, or location in southeastern Massachusetts popu lations.\nEvent page: https://www.umassd.edu/events/cms/biology-master-the sis-defense-by-karissa-collins.php X-ALT-DESC;FMTTYPE=text/html:

Advisor: Dr. R obert Drew

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Committee Members: Dr. Robert Drew\, Dr. Kenneth Oliveira and Dr. Whitney Hable

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Abstract: The American eel (Anguilla rostrata) is a widely distributed catadrom ous species that undergoes a final metamorphosis from the yellow to silver phase prior to its spawning migration to the Sargasso Sea. This silver me tamorphosis involves substantial morphological and physiological changes\, yet the life history cues initiating this transition remain uncertain. In this study\, age\, total length\, body composition\, and energy reserves were examined in yellow and silver phase eels from four rivers in Southeas tern Massachusetts (Paskamansett\, Acushnet\, Mill\, and Jones rivers). Pe rcent dry weight was strongly correlated with energy density across sexes and life stages\, and composition of a standardized body section reliably predicted whole-fish values\, indicating an efficient proxy for energetic assessment. Females migrated at older ages and larger sizes than males. Li pid content exceeded protein content at migration for both males and femal es\, suggesting lipid reserves may be important at the onset of silver met amorphosis. Mean minimum lipid content was 16.09% for females and 15.03% f or males\, while energy density did not differ between sexes. These result s suggest that energetic thresholds\, particularly lipid reserves\, may pl ay a greater role in triggering silver metamorphosis than age\, sex\, or l ocation in southeastern Massachusetts populations.

Event page: https://www.umassd.edu/events/cms/biology-master-thesis- defense-by-karissa-collins.php

DTSTAMP:20260406T151556 DTSTART;TZID=America/New_York:20260317T100000 DTEND;TZID=America/New_York:20260317T110000 LOCATION:SENG Bldg., Rm. 305 SUMMARY;LANGUAGE=en-us:Biology Master Thesis Defense by Karissa Collins UID:d07c2f4f66fb14ae4caa44b54c91d225@www.umassd.edu END:VEVENT END:VCALENDAR