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Appendix 17
Sample Brochure
SUPERVISORY COMMITTEE
Programme for the Final Oral Examination Dr. Ray Thompson
and Defence of Thesis Professor (Research)
for the Degree of Ocean Sciences Centre
Doctor of Philosophy
Dr. Don Deibel
J. Roberto Jaramillo, B.Sc., M.Sc. Associate Professor (Research)
Department of Biology Ocean Sciences Centre
10:00 a.m. Dr. Paul Snelgrove
Monday, August 20th, 2001 Associate Chair
Fisheries Conservation Chair
Room ER-4002 Fisheries and Marine Institute
Alexander Murray Building
The Effect of a Seasonal Pulse of Sinking Phytodetritus on the Reproduction of
EXAMINATION CHAIR Two Benthic Deposit-Feeding Species, Yoldia Hyperborea and Ctenodiscus
Crispatus
Dr. Karen Mearow
Associate Professor Abstract
Faculty of Medicine Reproductive cycle of mollusc species have been exhaustively studied.
Many of these demonstrated that fluctuating environmental factors affect the
EXAMINATION BOARD length of the spawning period and timing of reproduction.
Dr. Paul Tyler Species inhabiting unstable environments generally have a seasonal
School of Ocean and Earth Science reproductive cycle whereas species living in more stable environments
University of Southampton
generally reproduce continuously. Recent studies suggest that many stable
Southampton Oceanography Centre
environments, such as the deep sea, are not as stable as previously thought,
Southampton, United Kingdom since many sublittoral and deep sea areas experience seasonal phytodetritus
sinking which may affect the reproductive activity of some species.
Dr. Margaret Burton
Associate Professor In Conception Bay, Newfoundland, there is a deposition of phytodetritus
Department of Biology which reaches the bottom at 240 m depth shortly after the spring and fall
Memorial University of Newfoundland phytoplankton blooms. However, the reproductive response of the benthic
community to this seasonal input is completely unknown.
Dr. Pat Dabinett
Associate Professor In order to examine the reproductive response to a seasonal input of food
Department of Biology in the benthic community in Conception Bay, two common deposit feeders
Memorial University of Newfoundland
were selected, Yoldia hyperborea and Ctenodiscus crispatus. This study provides new data on the role of phytodetritus deposition in the reproduction
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of these species and on the ecological significance of a seasonally-pulsed 1996-2001 Canadian International Development Agency /
food supply on the deposit feeding community inhabiting Conception Bay. Memorial University of Newfoundland Scholarship
Yoldia hyperborea had a larval development through a lecithotrophic TEACHING POSITIONS AND LECTURESHIPS
pericalymma larva which is restricted to protobranch species. Spawning
occurred during the winter-spring period coincident or following phytodetrital 1986 Assist.Professor, Instituto Profesional de Osorno, Chile
deposition. Laboratory feeding experiments showed that frequent addition of 1990-1996 Assist.Professor, Universidad Austral de Chile, Valdivia, Chile
phytodetritus stimulates production of eggs, supporting field observations 1999-Present Assist.Professor, Universidad Austral de Chile, Valdivia, Chile
suggesting that gamete production of Y. hyperborea is dependent on food
availability. Laboratory experiments using 14C labelled Thalassiosira MEMBERSHIPS IN ACADEMIC AND PROFESSIONAL SOCIETIES
nordenskioldii demonstrated incorporation of cell contents into the gonad. Sociedad Chilena de Ciencias del Mar
Ctenodiscus crispatus eggs develop through a lecithotrophic larvae. Publications
Reproduction occurred continuously throughout the year, although
fecundity was higher in spring due to seasonal phytodetritus sinking. Jaramillo, R., Garrido, O. and Jorquera, B. Ultraestructural Analysis of
Spermiogenesis and Sperm Morphology in Chorus giganteus (Lesson, 1829)
The reproductive cycle of both deposit feeders was affected by (Prosobranchia: Muricidae). The Veliger 29 (2):217- 25. 1986.
fluctuations in food availability. Individual fecundity was maximal
coincident with or just following the seasonal peak in phytodetritus Jaramillo, R. and Garrido, O. Estudio del Ciclo Reproductivo de Chorus
deposition. Energy provided by resuspension events appeared to be giganteus en Isla del Rey, Valdivia Biol. Pesq. 19:49-53. 1990.
utilized for gametogenesis as in Yoldia hyperborea and in Ctenodiscus
crispatus. Jaramillo, R. Female Genital System of Chorus giganteus. (Prosobranchia:
Muricidae) The Veliger 34 (3):297-301. 1991.
BIOGRAPHICAL INFORMATION
Jaramillo, R., J., Winter., J., Valencia. and A. Rivera. Gametogenic cycle of the
1960 Born, Valdivia, Chile Chiloé Scallop Chlamys amandi. Journal of Shellfish Research.
12(1): 59 - 64. 1993
1986 B.Sc., Universidad Austral de Chile - Valdivia, Chile
Navarro, J. and Jaramillo, R. Evaluación de la oferta alimentaria natural
1986 M. Sc. Universidad Austral de Chile - Valdivia, Chile disponible a organísmos filtradores de la Bahía de Yaldad ( 43/ 08'S; 73/ 44'W)
Sur de Chile. Rev. Biol. Mar. Valpo. 29(1).57-75. 1994
Thesis Title:
Jaramillo, R. and Navarro, J. Reproductive cycle of the Chilean ribbed mussel
Estudio del Ciclo Reproductivo, Gametogénesis y Morfología Aulacomya ater. Journal of Shellfish Research. 14(1):165-171. 1995
Espermática de Chorus giganteus (Lesson, 1829) en Puerto
Claro, Isla del Rey, Valdivia
1996-Present Ph.D. Candidate, Memorial University of Newfoundland,
St. John’s, Newfoundland
SCHOLARSHIPS AND AWARDS
1992 Fundacion Andes - International Cell Research Organization
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