https://commons.ru.ac.za/vital/access/manager/Index ${session.getAttribute("locale")} 5 The trophic position and isotopic niche of a cryptogenic tube-building polychaete in a protected clear-water estuarine bay https://commons.ru.ac.za/vital/access/manager/Repository/vital:75341 Wed 11 Sep 2024 11:58:36 SAST ]]> The relative importance of autochthony along the longitudinal gradient of a small South African river influenced by agricultural activities https://commons.ru.ac.za/vital/access/manager/Repository/vital:75340 Wed 11 Sep 2024 11:54:12 SAST ]]> Spatial and temporal variability in the nutritional quality of basal resources along a temperate river/estuary continuum https://commons.ru.ac.za/vital/access/manager/Repository/vital:75339 Wed 11 Sep 2024 11:49:14 SAST ]]> Fatty acid analyses provide novel insights on hippo defecation and consequences for aquatic food webs https://commons.ru.ac.za/vital/access/manager/Repository/vital:75337 Wed 11 Sep 2024 11:42:13 SAST ]]> Cross boundary fluxes: Basal resource use by aquatic invertebrates matches fatty acid transfers from river to land https://commons.ru.ac.za/vital/access/manager/Repository/vital:75334 Wed 11 Sep 2024 11:29:41 SAST ]]> The role of macrophytes as a refuge and food source for the estuarine isopod Exosphaeroma hylocoetes () https://commons.ru.ac.za/vital/access/manager/Repository/vital:75735 90%), even in absence of fish. The predatory fish had varying success in finding isopods within the vegetation. Isopod mortality ranged from 2% (R. holubi) to a maximum of 87% (C. cottoides) within vegetation, depending on the fish predator present. Stable isotope and fatty acid analyses ruled out the submerged macrophyte Ruppia maritima and inundated fringing grasses as direct food sources, but highlighted the epiphytic biota (mainly diatoms) found on the submerged vegetation and sediments as more likely food sources. These findings are consistent with gut content analyses. The results suggest that the close association of E. hylocoetes with R. maritima is the result of the vegetation providing the isopod with a refuge against fish predation as well as areas of increased food availability.]]> Wed 09 Oct 2024 12:00:53 SAST ]]> Trophic ecology of adult male O donata. II. D ietary contributions of aquatic food sources https://commons.ru.ac.za/vital/access/manager/Repository/vital:75510 80% of total diet in some cases) indicat-ed that cross‐boundary trophic linkages via odonates are strong in the Kowie River.]]> Tue 17 Sep 2024 11:18:14 SAST ]]> Trophic ecology of adult male Odonata. I. Dietary niche metrics by foraging guild, species, body size, and location https://commons.ru.ac.za/vital/access/manager/Repository/vital:75508 Tue 17 Sep 2024 11:09:18 SAST ]]> The effect of different dietary microalgae on the fatty acid profile, fecundity and population development of the calanoid copepod Pseudodiaptomus hessei (Copepoda: Calanoida) https://commons.ru.ac.za/vital/access/manager/Repository/vital:75502 Tue 17 Sep 2024 10:43:55 SAST ]]> Macroinvertebrate functional organisation along the longitudinal gradient of an austral temperate river https://commons.ru.ac.za/vital/access/manager/Repository/vital:75499 Tue 17 Sep 2024 10:20:13 SAST ]]> Effects of temperature and food quality on isotopic turnover and discrimination in a cladoceran https://commons.ru.ac.za/vital/access/manager/Repository/vital:75494 Tue 17 Sep 2024 09:56:36 SAST ]]> Characterisation of the dietary relationships of two sympatric hake species, Merluccius capensis and M. paradoxus, in the northern Benguela region using fatty acid profiles https://commons.ru.ac.za/vital/access/manager/Repository/vital:75475 Tue 17 Sep 2024 08:34:06 SAST ]]> Depth and habitat determine assemblage structure of South Africa’s warm-temperate reef fish https://commons.ru.ac.za/vital/access/manager/Repository/vital:75477 Tue 17 Sep 2024 08:34:05 SAST ]]> Trophic ecology of zooplankton at a frontal transition zone: fatty acid signatures at the subtropical convergence, Southern Ocean https://commons.ru.ac.za/vital/access/manager/Repository/vital:75711 Tue 08 Oct 2024 08:54:18 SAST ]]> Trophic ecology of grey-headed albatrosses from Marion Island, Southern Ocean: insights from stomach contents and diet tracers https://commons.ru.ac.za/vital/access/manager/Repository/vital:75710 1‰ in chicks. The combined FA, stable isotopes and stomach contents analyses suggest clear differences in diet quality between adults and chicks, with chicks feeding at a higher trophic position through feeding more on highly nutritious fish and adults keeping much of the less nutritious zooplankton for themselves.]]> Tue 08 Oct 2024 08:49:26 SAST ]]> Trophic relationships of hake (Merluccius capensis and M. paradoxus) and sharks (Centrophorus squamosus, Deania calcea and D. profundorum) in the Northern (Namibia) Benguela Current region https://commons.ru.ac.za/vital/access/manager/Repository/vital:75636 Tue 01 Oct 2024 10:27:56 SAST ]]> Fatty acids reveal the importance of autochthonous non-vascular plant inputs to an austral river food web https://commons.ru.ac.za/vital/access/manager/Repository/vital:75542 Thu 19 Sep 2024 10:38:32 SAST ]]> Dietary tracers and stomach contents reveal pronounced alimentary flexibility in the freshwater mullet (Myxus capensis, Mugilidae) concomitant with ontogenetic shifts in habitat use and seasonal food availability https://commons.ru.ac.za/vital/access/manager/Repository/vital:75493 Thu 19 Sep 2024 09:35:04 SAST ]]> Impact of an introduced predator (Micropterus salmoides, Centrarchidae) on native estuarine fish elucidated through fatty acid analyses https://commons.ru.ac.za/vital/access/manager/Repository/vital:75496 Thu 19 Sep 2024 09:32:06 SAST ]]> Seasonal population dynamics and energy consumption by waterbirds in a small temperate estuary https://commons.ru.ac.za/vital/access/manager/Repository/vital:75501 Thu 19 Sep 2024 09:30:23 SAST ]]> Tide-induced variations in the fatty acid composition of estuarine particulate organic matter https://commons.ru.ac.za/vital/access/manager/Repository/vital:75504 Thu 19 Sep 2024 09:30:23 SAST ]]> Trophic dynamics of the cape stumpnose (Rhabdosargus holubi, Sparidae) across three adjacent aquatic habitats https://commons.ru.ac.za/vital/access/manager/Repository/vital:75506 Thu 19 Sep 2024 09:25:20 SAST ]]> Dietary fatty acids of spiders reveal spatial and temporal variations in aquatic-terrestrial linkages https://commons.ru.ac.za/vital/access/manager/Repository/vital:75335 Thu 12 Sep 2024 08:27:08 SAST ]]> Agricultural disturbance affects taxonomic and functional diversity of Afrotropical macroinvertebrate composition in a South African river system https://commons.ru.ac.za/vital/access/manager/Repository/vital:75333 Thu 12 Sep 2024 08:23:34 SAST ]]> Exploring the community structure of Afrotropical macroinvertebrate traits and ecological preferences along an agricultural pollution gradient in the Kat River, Eastern Cape, South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:75336 10–20 mm), active swimming, possession of spiracles and haemoglobin, and adult aquatic life stage increasing with the pollution gradient. These traits were positively associated with nutrients (PO4+-P, NO2+-N, NH4+-N and NO3+-N), salinity, turbidity and temperature and were deemed tolerant of agricultural pollution. Shredding, crawling, and a preference for macrophytes as food showed strong positive associations with the least disturbed sites and were negatively associated with increasing nutrients, salinity, turbidity and water temperature. As such, these three traits were considered sensitive to agricultural pollution. The identified indicator traits can be used to predict the survival and distribution patterns of organisms under the impact of agriculture-induced stress.]]> Thu 12 Sep 2024 08:20:39 SAST ]]> Protected nearshore shallow and deep subtidal rocky reef communities differ in their trophic diversity but not their nutritional condition https://commons.ru.ac.za/vital/access/manager/Repository/vital:75338 Thu 12 Sep 2024 08:14:16 SAST ]]> Temporal variability in the isotopic niches of rocky shore grazers and suspension-feeders https://commons.ru.ac.za/vital/access/manager/Repository/vital:75627 Mon 30 Sep 2024 13:00:53 SAST ]]> Temporal shifts in the fatty acid profiles of rocky intertidal invertebrates https://commons.ru.ac.za/vital/access/manager/Repository/vital:75626 Mon 30 Sep 2024 12:56:39 SAST ]]> Stable isotope evidence of food web connectivity by a top predatory fish (Argyrosomus japonicus: Sciaenidae: Teleostei) in the Kowie Estuary, South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:75625 Mon 30 Sep 2024 12:53:28 SAST ]]> Spatial and temporal variations in stable carbon (δ13C) and nitrogen (δ15N) isotopic composition of symbiotic scleractinian corals https://commons.ru.ac.za/vital/access/manager/Repository/vital:75624 Mon 30 Sep 2024 12:49:37 SAST ]]> Spatial and temporal changes in estuarine food web structure: differential contributions of marsh grass detritus https://commons.ru.ac.za/vital/access/manager/Repository/vital:75623 Mon 30 Sep 2024 11:49:24 SAST ]]> Phytoplankton community diversity along a river-estuary continuum https://commons.ru.ac.za/vital/access/manager/Repository/vital:75622 Mon 30 Sep 2024 11:45:22 SAST ]]> Influence of an intermittent food supply on energy storage by the subpolar deposit feeder Yoldia hyperborea (Bivalvia: Nuculanidae) https://commons.ru.ac.za/vital/access/manager/Repository/vital:75621 Mon 30 Sep 2024 11:42:08 SAST ]]> Food preferences of the estuarine crab Sesarma catenata estimated through laboratory experiments https://commons.ru.ac.za/vital/access/manager/Repository/vital:75620 Mon 30 Sep 2024 11:38:45 SAST ]]> Evidence of spatial and temporal changes in sources of organic matter in estuarine sediments https://commons.ru.ac.za/vital/access/manager/Repository/vital:75619 Mon 30 Sep 2024 11:35:14 SAST ]]> Depth-related distribution patterns of subtidal macrobenthos in a well-established marine protected area https://commons.ru.ac.za/vital/access/manager/Repository/vital:75618 Mon 30 Sep 2024 11:30:27 SAST ]]> Culture environment and hatchery of origin influence growth, condition and feeding organ morphology in the Pacific oyster Crassostrea gigas in South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:75617 Mon 30 Sep 2024 11:25:50 SAST ]]> Preliminary survey of indigenous, non-indigenous and cryptogenic benthic invertebrates in Burrard Inlet, Vancover, British Columbia https://commons.ru.ac.za/vital/access/manager/Repository/vital:75705 Mon 07 Oct 2024 11:34:02 SAST ]]> Plankton trophodynamics at the subtropical convergence, Southern Ocean https://commons.ru.ac.za/vital/access/manager/Repository/vital:75704 Mon 07 Oct 2024 11:24:02 SAST ]]> Exploring trophodynamics in the Southern Ocean: applications of fatty acid biomarkers and stable isotope ratios https://commons.ru.ac.za/vital/access/manager/Repository/vital:75703 Mon 07 Oct 2024 11:16:15 SAST ]]> Determining spatial changes in the diet of nearshore suspension-feeders along the South African coastline: stable isotope and fatty acid signatures https://commons.ru.ac.za/vital/access/manager/Repository/vital:75697 Mon 07 Oct 2024 11:03:13 SAST ]]> Critical indirect effects of climate change on sub-A ntarctic ecosystem functioning https://commons.ru.ac.za/vital/access/manager/Repository/vital:75696 Mon 07 Oct 2024 10:52:42 SAST ]]> Assessment of spatial variation in carbon utilization by benthic and pelagic invertebrates in a temperate South African estuary using stable isotope signatures https://commons.ru.ac.za/vital/access/manager/Repository/vital:75695 Mon 07 Oct 2024 10:40:54 SAST ]]>