https://commons.ru.ac.za/vital/access/manager/Index en-us 5 https://commons.ru.ac.za/vital/access/manager/Repository/vital:26750 Wed 20 Jul 2022 08:42:27 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:28628 Wed 12 May 2021 23:09:26 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:26562 0.6), and in the remaining species there was no significant trophic niche overlap. Amietia angolensis showed a larger trophic niche (Levin’s measure; B = 7.7 and Bst = 0.84 downstream, and upstream B = 7.6 (Bst = 0.82) compared to the other species. The gut content analyses showed that frogs feed on a variety of prey items that constitutes food sources from both aquatic and terrestrial habitats. Stable isotopes indicated that aquatic derived sources contributed significantly more towards the diets of X. laevis, A. angolensis tadpoles and S. grayii tadpoles compared with the other anurans, whereas aquatic and terrestrial derived food sources contributed equally to the diets of A. angolensis and S. grayii. Increased trophic positions in A. angolensis and S. grayii occurred throughout their development. The four different species had similar fatty acid profiles in the upstream region, and fairly similar δ13C values, suggesting that they probably consumed similar food. Fatty acid profiles of anurans in the downstream region showed distinct separations among the species. Tadpoles had high levels of diatom-associated fatty acids (20:5ω3; A. angolensis tadpole – 8.4 %, S. grayii tadpole – 9.4 % upstream and downstream; 9.1 and 6.1 % total fatty acids (TFA), respectively). All four species had substantial contributions from bacterial fatty acids, and large proportions of saturated fatty acids (30.6 - 50.0 %) including those with 14 and 18 carbons, indicating that bacterial and detritus food sources played an important role in their diets. The fatty acid profiles revealed high proportions of polyunsaturated fatty acids (PUFAs) and essential fatty acids (EFAs) in all species, indicating a good quality of food and that the quality of food consumed was similar among species. The results demonstrated the usefulness of a combination of traditional techniques (gut content techniques) and biochemical techniques (stable isotopes and fatty acid analysis) for assessing consumption and assimilation. The amphibian assemblages examined derived much of their energy from terrestrial and aquatic sources. This information will allow more precise and comprehensive assessments of trophic interactions in freshwater habitats, along with aiding in future amphibian conservation and management efforts.]]> Wed 12 May 2021 19:28:40 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:28591 Wed 12 May 2021 19:06:38 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:28594 Wed 12 May 2021 19:05:02 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:26568 Wed 12 May 2021 18:17:07 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:26752 Wed 12 May 2021 17:42:52 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:26610 Wed 12 May 2021 17:04:13 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:26753 Wed 12 May 2021 16:45:09 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:26769 Wed 12 May 2021 16:25:40 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:26563 50 %) in the upper to middle reaches (river), but low (< 20 %) in the lower reaches (estuary). The current investigation represents the first attempt to assess the validity of the River Continuum Concept (RCC) in a southern African temperate river. The phytoplankton and phytobenthos communities, and chl-a concentration followed a trend similar to that proposed for the river continuum concept (RCC). The middle reaches based on the phytobenthos or phytoplankton communities and chl-a concentrations which were employed as proxies for primary production, were the most productive, while the upper reaches were the least primary productive. The evaluation of organic matter contributions to the SPM and detritus along the river–estuary continuum provided a baseline assessment of the nature and sources of potential food for consumers inhabiting different locations during different times of the year. Incorporating such spatio-temporal variations in SPM and detritus into food web studies will improve our understanding of the flow of carbon through aquatic systems.]]> Wed 12 May 2021 15:56:40 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5988 Thu 13 May 2021 12:06:19 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:26611 Thu 13 May 2021 06:32:02 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:26602 Thu 13 May 2021 06:31:38 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:26608 Thu 13 May 2021 06:09:48 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:27439 Thu 13 May 2021 06:06:15 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:28522 Thu 13 May 2021 05:29:11 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:26767 Thu 13 May 2021 04:17:25 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:26740 Thu 13 May 2021 04:01:16 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:28608 Thu 13 May 2021 03:49:57 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:26583 Thu 13 May 2021 03:30:11 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:26588 Thu 13 May 2021 03:30:04 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:26600 Thu 13 May 2021 02:49:04 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:26764 Thu 13 May 2021 02:18:22 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:26569 Thu 13 May 2021 02:17:49 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:26566 Thu 13 May 2021 02:13:25 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:28607 Thu 13 May 2021 01:16:43 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:26601 5% w/v led to a reduction in DLC and EE and an increase in PS with minimal impact on the ZP. Stability studies conducted at 25°C/65% RH and 40°C/75% RH for up to 30 days following manufacture revealed that batch SLM 15 manufactured using 10% w/v Labrafil® M2130 CS, 5% w/v KTZ and a combination of 4% w/v Pluronic® F-68, 2% w/v Tween 80 and 1% w/v sodium cholate produced the most stable dosage form when stored at 25°C/65% RH for up to 30 days. However, storage at 40°C/75% RH resulted in instability of the formulation. An aqueous dispersion of KTZ-loaded SLM has been developed and assessed and may offer an alternative to extemporaneous preparations used for KTZ therapy in paediatric and immuno-compromised patients.]]> Thu 13 May 2021 01:07:54 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:28593 Thu 13 May 2021 00:58:01 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:28596 Thu 01 Feb 2024 09:56:38 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:26596 Fri 09 Jun 2023 15:34:31 SAST ]]>