A study of the feeding biology of deep-sea echinoids from the North Atlantic
A study of the feeding biology of deep-sea echinoids from the North Atlantic
The seasonal downward flux of phytodetrital material to the deep-sea floor is now becoming recognized as a significant pathway of nutrient energy to the bottom-dwelling biota. The diet of two deep-sea echinoids was investigated in order to evaluate the effect of this food input on their life history: Phormosoma placenta Wyville Thomson, a non-seasonal breeder; and Echinus affinis Mortensen, a seasonal breeder; both collected during two major deep-sea investigations including both temporal and depth related sampling programmes in the NE Atlantic. During a cruise to the Bahamas from May 25 to June 7, 1989 fresh samples of regular echinoids were also examined: Cidaris blakei, Stylocidaris lineata, Aspidodiadema jacobyi and P. placenta.
Morphological observations, transmission electron microscopy and histological analysis of the gut wall, particle-size distribution and chemical analyses of the gut content were undertaken in the laboratory. The gut content of specimens of each species were identified in detail using a scanning electron microscope.
Nonlinear regression and 'lack of fit' analysis have resulted in the identification of a number of seasonal fluctuations in the organ and gut content indices of both P. placenta and E. affinis (NE Atlantic).
University of Southampton
Campos-Creasey, Lúcia de Siqueira
1801b35e-54b4-4baf-88f8-9ca81aecdab4
1992
Campos-Creasey, Lúcia de Siqueira
1801b35e-54b4-4baf-88f8-9ca81aecdab4
Campos-Creasey, Lúcia de Siqueira
(1992)
A study of the feeding biology of deep-sea echinoids from the North Atlantic.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
The seasonal downward flux of phytodetrital material to the deep-sea floor is now becoming recognized as a significant pathway of nutrient energy to the bottom-dwelling biota. The diet of two deep-sea echinoids was investigated in order to evaluate the effect of this food input on their life history: Phormosoma placenta Wyville Thomson, a non-seasonal breeder; and Echinus affinis Mortensen, a seasonal breeder; both collected during two major deep-sea investigations including both temporal and depth related sampling programmes in the NE Atlantic. During a cruise to the Bahamas from May 25 to June 7, 1989 fresh samples of regular echinoids were also examined: Cidaris blakei, Stylocidaris lineata, Aspidodiadema jacobyi and P. placenta.
Morphological observations, transmission electron microscopy and histological analysis of the gut wall, particle-size distribution and chemical analyses of the gut content were undertaken in the laboratory. The gut content of specimens of each species were identified in detail using a scanning electron microscope.
Nonlinear regression and 'lack of fit' analysis have resulted in the identification of a number of seasonal fluctuations in the organ and gut content indices of both P. placenta and E. affinis (NE Atlantic).
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Published date: 1992
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Local EPrints ID: 461725
URI: http://eprints.soton.ac.uk/id/eprint/461725
PURE UUID: cddae8ca-e4c5-4c49-b72b-69b38abaf754
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Date deposited: 04 Jul 2022 18:52
Last modified: 16 Mar 2024 18:50
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Author:
Lúcia de Siqueira Campos-Creasey
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