Memorial University DAI: Assessment of the biology, ecology and genetic structure of the sea cucumber Cucumaria frondosa for management of the fishery in the Newfoundland and Labrador region

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Title	Assessment of the biology, ecology and genetic structure of the sea cucumber Cucumaria frondosa for management of the fishery in the Newfoundland and Labrador region
Author	So, Justin James.
Description	Thesis (M.Sc.)--Memorial University of Newfoundland, 2009. Biology
Date	2009
Pagination	1 v. (various foliations) : ill., maps (chiefly col.)
Subject	Fishery management--Newfoundland and Labrador; Sea cucumbers--Ecology--Newfoundland and Labrador; Sea cucumbers--Newfoundland and Labrador--Genetics; Trepang fisheries--Newfoundland and Labrador
Degree	M.Sc.
Degree Grantor	Memorial University of Newfoundland. Dept. of Biology
Discipline	Biology
Language	Eng
Spatial Coverage	Canada--Newfoundland and Labrador
Notes	Includes bibliographical references (leaves 3.26-3.38)
Abstract	The biological traits of the sea cucumber Cucumaria frondosa relevant from both ecological and resource management perspectives were investigated; including distribution, growth and predation on juveniles and adults, and population genetics. Natural densities were mainly dependent on substrate type and location. Spawning occurred from March to May in response to increasing phytoplankton abundance and larvae settled in ca. 5 weeks. Growth of juveniles and adults was slow (indicating ca. 25 years to reach market size) with seasonal patterns correlated with food supply. Juveniles of S. endeca fed upon post-metamorphic sea cucumbers, whereas adult feeding rates were modulated by temperature and biased towards small and injured sea cucumbers, suggesting that trawling may exacerbate predation pressure. Population genetic parameters are consistent with persistence in refugia through the last glacial maximum and local genetic patchiness is likely due to variations in recruitment. A precautionary management approach is advisable to ensure the sustainability of the fishery.
Type	Text
Resource Type	Electronic thesis or dissertation
Format	Image/jpeg; Application/pdf
Source	Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries
Local Identifier	a3243839
Rights	The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission.
Collection	Electronic Theses and Dissertations
Scanning Status	Completed
PDF File	(20.86 MB) -- http://collections.mun.ca/PDFs/theses/So_JustinJ.pdf
CONTENTdm file name	43612.cpd