Relationships between invertebrate detritivores and gut bacteria in marine systems

Simple item page
dc.contributor.advisorLucas, Michael Ien_ZA
dc.contributor.advisorBranch, George Men_ZA
dc.contributor.authorHarris, Jean Maryen_ZA
dc.date.accessioned2016-03-28T14:43:21Z
dc.date.available2016-03-28T14:43:21Z
dc.date.issued1992en_ZA
dc.description.abstractAspects of the feeding strategies and digestive invertebrate-microbial interactions of two saltmarsh thalassinid detritivores, the mudprawn Upogebia africana (Ortmann) and the sandprawn Callianassa kraussi Stebbing were examined. Resources available in their respective habitats were investigated together with the feeding apparatus, diet and digestive enzymes necessary for hydrolysis of refractory compounds of detritus. U. africana inhabits the upper reaches of Langebaan lagoon (Geelbek),. while C. kraussi was sampled near the mouth (Oesterwal). Both species occur intertidally. Physical characteristics of sediment and water fluctuate more widely at Geelbek than at Oesterwal. Geelbek also has higher mud and clay content in the sediment, and greater particulate load in the water. The resources available in both sediment and water from Geelbek were of greater quality (assessed by proportion of living component, C:N ratio) and quantity. In terms of distribution ofthe resource, quality was highest in surface sediments, while quality was greatest at burrow linings. The mode of feeding, gut structure and diet of the two prawn species differ, although gut throughput rates are similar (ca. 6h). U. africana is a filter feeder which non-selectively ingests small particles which are further sorted in the modified filtertype gastric mill into larger particles which enter the midgut, and smaller particles which are channeled into the hepatopancreas. U. africana has a relatively large throughput gut (fore, mid, hind) allowing large meals to be taken. This may be related to its reliance on vascular plant detritus for both carbon and nitrogen requirements, as shown by stable isotope analyses. By contrast, C. kraussi feeds by a combination of deposit feeding and filter feeding.en_ZA
dc.identifier.apacitationHarris, J. M. (1992). <i>Relationships between invertebrate detritivores and gut bacteria in marine systems</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/18326en_ZA
dc.identifier.chicagocitationHarris, Jean Mary. <i>"Relationships between invertebrate detritivores and gut bacteria in marine systems."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1992. http://hdl.handle.net/11427/18326en_ZA
dc.identifier.citationHarris, J. 1992. Relationships between invertebrate detritivores and gut bacteria in marine systems. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Harris, Jean Mary AB - Aspects of the feeding strategies and digestive invertebrate-microbial interactions of two saltmarsh thalassinid detritivores, the mudprawn Upogebia africana (Ortmann) and the sandprawn Callianassa kraussi Stebbing were examined. Resources available in their respective habitats were investigated together with the feeding apparatus, diet and digestive enzymes necessary for hydrolysis of refractory compounds of detritus. U. africana inhabits the upper reaches of Langebaan lagoon (Geelbek),. while C. kraussi was sampled near the mouth (Oesterwal). Both species occur intertidally. Physical characteristics of sediment and water fluctuate more widely at Geelbek than at Oesterwal. Geelbek also has higher mud and clay content in the sediment, and greater particulate load in the water. The resources available in both sediment and water from Geelbek were of greater quality (assessed by proportion of living component, C:N ratio) and quantity. In terms of distribution ofthe resource, quality was highest in surface sediments, while quality was greatest at burrow linings. The mode of feeding, gut structure and diet of the two prawn species differ, although gut throughput rates are similar (ca. 6h). U. africana is a filter feeder which non-selectively ingests small particles which are further sorted in the modified filtertype gastric mill into larger particles which enter the midgut, and smaller particles which are channeled into the hepatopancreas. U. africana has a relatively large throughput gut (fore, mid, hind) allowing large meals to be taken. This may be related to its reliance on vascular plant detritus for both carbon and nitrogen requirements, as shown by stable isotope analyses. By contrast, C. kraussi feeds by a combination of deposit feeding and filter feeding. DA - 1992 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1992 T1 - Relationships between invertebrate detritivores and gut bacteria in marine systems TI - Relationships between invertebrate detritivores and gut bacteria in marine systems UR - http://hdl.handle.net/11427/18326 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/18326
dc.identifier.vancouvercitationHarris JM. Relationships between invertebrate detritivores and gut bacteria in marine systems. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1992 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18326en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Biological Sciencesen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherZoologyen_ZA
dc.titleRelationships between invertebrate detritivores and gut bacteria in marine systemsen_ZA
dc.typeDoctoral Thesis
dc.type.qualificationlevelDoctoral
dc.type.qualificationnamePhDen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
thesis_sci_1992_harris_jean_mary.pdf
Size:
8.28 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
PhD / Doctoral