https://vital.seals.ac.za/vital/access/manager/Index ${session.getAttribute("locale")} 5 https://vital.seals.ac.za/vital/access/manager/Repository/vital:1163 Wed 30 Mar 2022 14:38:05 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:9852 Wed 13 Mar 2024 10:42:24 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6947 Wed 12 May 2021 23:41:30 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:1204 Wed 12 May 2021 23:41:16 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:39624 Wed 12 May 2021 23:25:17 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4192 Wed 12 May 2021 23:18:25 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:3990 Wed 12 May 2021 22:59:27 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:2934 Wed 12 May 2021 22:46:10 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:965 Wed 12 May 2021 22:34:52 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:9261 Wed 12 May 2021 22:30:46 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6905 Wed 12 May 2021 22:27:17 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:817 Wed 12 May 2021 22:23:23 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:3964 0.05]. These results imply that differences in the biosynthetic pathways for biomass accumulation in sibling strains play a significant role in the intraspecific variation observed in pollutant sensitivity, pollutant degradation, and enzyme production. Categorical analysis of intraspecific differences was assessed according to four criterions. These included growth, extracellular peroxidase activities, tolerance to toxic pollutants and the biodegradation of model pollutants. Sibling strains showing the most variable responses in three or more of the selective criterion were recommended for further studies. These strains include P. chrysosporium ME446, BS 2.52, BS 13, BS 17, BS 18, and BS 24. Interestingly, BS 2.52 (a dikaryotic strain generating from the crossing of two haploid progeny) showed significantly lower degradation capabilities than the wildtype parent strain ME446. The inherited variability observed between sibling strains is to be further explored through proteome and transcriptome analysis and genetic linkage studies aimed at describing the mechanisms or pathways conferring tolerance to or degradation of environmental pollutants. In examining fewer organisms at this next level, the number of replicates examined can be increased and thus the power of detection of experimental procedures improved, enabling the detection of multigenic traits amongst genetically related organisms. Growth was shown to play a significant role in the intraspecific differences detected in pollutant sensitivity and degradation between sibling strains. Little is known about the mechanism of growth and differentiation, or the role of differentiation in regulating the lignolytic activity in this organism. The membrane gradostat bioreactor and a unique plug-flow membrane bioreactor were evaluated as novel tools with which to further explore the relationship between secondary metabolism, pollutant degradation and biofilm development in sibling strains. High yield MnP production at levels as high as 1478.8 U.l-1 was achieved using a laboratory scale membrane gradostat bioreactor. Furthermore, extensive mycelial differentiation and tissue formation are reported for P. chrysosporium in both the membrane gradostat bioreactor and plug-flow membrane bioreactor. Intraspecific differences in the extent of this differentiation were observed in strains ME446, BS 13, BS 17 and BS 26 cultured using the membrane gradostat bioreactor, highlighting the potential of these techniques as a platform for future strain improvement strategies.]]> Wed 12 May 2021 22:17:57 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:2936 Wed 12 May 2021 21:06:36 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4742 Wed 12 May 2021 20:27:36 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6634 Wed 12 May 2021 20:26:32 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:9732 Wed 12 May 2021 20:22:16 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5241 Wed 12 May 2021 20:14:05 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:8548 Wed 12 May 2021 20:02:32 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:11038 Wed 12 May 2021 19:53:03 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:8551 Wed 12 May 2021 19:51:08 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5698 Wed 12 May 2021 19:49:58 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:1034 Wed 12 May 2021 19:33:35 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:9486 Wed 12 May 2021 18:59:33 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6231 Wed 12 May 2021 18:59:00 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:8564 Wed 12 May 2021 18:54:59 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:9262 Wed 12 May 2021 18:51:13 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:2852 Wed 12 May 2021 18:13:30 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6917 Wed 12 May 2021 17:55:21 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:8549 Wed 12 May 2021 17:52:51 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:980 Wed 12 May 2021 17:40:13 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5243 1, it was asserted that both O. mossambicus and C. gariepinus were mortality-dominated and fairly heavily exploited. However, potential for sustainable exploitation existed since both species showed signs of resilience due short longevity and high rate of natural mortality. Given the limitation of simple exponential models of fish mortality and growth under the situation of seasonal fluctuation of water levels, a simple predictive hydroclimatic- fisheries model was developed. The model predicted the life-history and production parameters fairly accurately (0.53 ≤ r² ≥ 0.98, p ≤ 0.05), and showed that environmental and biological events in the floodplain significantly (0.43 ≤ r² ≥ 0.91, p ≤ 0.05) followed the periodic function of time (day-of-the-year), hence, strongly seasonal. In addition, the flood-pulse preceded all the major biological events, with predicted phase lags established at 55.6º for peak flood, 157.2º, 260.1º, 334.6º and 341.4º for condition factor for O. mossambicus, recruitment, spawning period for O. mossambicus and C. gariepinus, respectively. Therefore, it was recommended that water obstruction on the Shire River must ensure sufficient water flow during the peak flood and spawning period to allow flooding and inundation of the floodplain in order to create habitat favourable for spawning and feeding as well as improve recruitment.]]> Wed 12 May 2021 17:32:49 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:9609 Wed 12 May 2021 17:31:11 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6136 Wed 12 May 2021 17:13:12 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6229 Wed 12 May 2021 17:08:14 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:764 Wed 12 May 2021 17:04:04 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10925 Wed 12 May 2021 16:52:18 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:1170 Wed 12 May 2021 16:46:37 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6745 Wed 12 May 2021 16:46:12 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6679 Wed 12 May 2021 16:37:55 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:1127 Wed 12 May 2021 16:33:56 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:1947 Wed 12 May 2021 16:30:04 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:9380 Wed 12 May 2021 16:23:56 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:3416 Wed 12 May 2021 16:08:51 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:1650 Wed 12 May 2021 16:01:30 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6603 Wed 12 May 2021 15:51:42 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:42160 Wed 12 May 2021 15:06:04 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:40280 Wed 12 May 2021 14:40:27 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6569 Tue 18 Jul 2023 21:51:59 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6228 Thu 26 Aug 2021 15:05:38 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:43721 Thu 15 Jul 2021 19:24:36 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:8544 Thu 13 May 2021 13:15:23 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6359 Thu 13 May 2021 11:06:04 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6949 Thu 13 May 2021 08:48:13 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:3986 Thu 13 May 2021 08:03:28 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5328 Thu 13 May 2021 07:25:33 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:37966 Thu 13 May 2021 07:21:26 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6674 Thu 13 May 2021 07:19:13 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:3929 Thu 13 May 2021 07:14:41 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:948 Thu 13 May 2021 07:11:50 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:11017 Thu 13 May 2021 06:51:04 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:8536 Thu 13 May 2021 06:43:45 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:1315 Thu 13 May 2021 06:39:27 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:8539 Thu 13 May 2021 06:35:33 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:2938 Thu 13 May 2021 06:07:27 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6226 Thu 13 May 2021 06:06:32 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6230 Thu 13 May 2021 05:59:59 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10166 Thu 13 May 2021 05:42:36 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:9376 Thu 13 May 2021 05:41:58 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:8542 Thu 13 May 2021 05:06:39 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4746 Thu 13 May 2021 04:56:04 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:38185 Thu 13 May 2021 04:28:07 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5913 0.05). The multivariate analysis identified two interacting mechanisms controlling the distribution patterns, abundance and biomass of the various euphausiid species, namely (1) diel changes in abundance and biomass, (2) and restricted distribution patterns associated with the different water masses. Ingestion rates were determined for five euphausiid species. E. triacantha was found to have the highest daily ingestion rate ranging from 1 226.1 to 6 029.1 ng pigm ind⁻¹d⁻¹, while the lowest daily ingestion rates were observed in the juvenile Thysanoessa species (6.4 to 943.0 ng pigm ind⁻¹ d⁻¹). The total grazing impact of the selected euphausiids ranged from < 0.1 to 20.1 μg pigm m⁻²d⁻¹, corresponding to < 0.15 % of the areal chl-a biomass. The daily ration estimates of autotrophic carbon for the euphausiids suggested that phytoplankton represented a minor component in their diets, with only the sub-adult E. vallentini consuming sufficient phytoplankton to meet their daily carbon requirements. A cyclonic cold-core eddy spawned from the region of the APF located in the southwest Indian sector of the PFZ was the dominant feature during the 2005 survey. The total areal chl-a biomass throughout the region was low, ranging between 5.6 and 11.4 mg chl-a m⁻², and was significantly higher within the core of the eddy compared to the surrounding waters (p < 0.05). RMT-8 and WP-2 total euphausiid abundance and biomass estimates were high, and ranged from 0.004 to 0.36 ind m⁻³ and 0.065 to 1.21 mg dwt m⁻³, and from 0.01 to 18.2 ind m⁻³ and 0.01 to 15.7 mg dwt m⁻³, respectively. A distinct spatial pattern in the euphausiid community was evident with the Antarctic species, Euphausia frigida, E. triacantha and E. superba predominating within the core of the eddy, while the PFZ waters were characterized by the sub-Antarctic species, E. longirostris, Stylocheiron maximum, Nematoscelis megalops and Thysanoessa gregaria. The eddy edge acted as a transition zone where species from both regions co-occurred. Within the survey area the combined ingestion rate of the six numerically dominant euphausiid species ranged between 0.02 and 5.31 μg pigm m⁻²d¹, which corresponded to a loss of between < 0.001 and 0.11 % of the available chl-a biomass. E. triacantha and juvenile T. macura were identified as the dominant grazers. There was no apparent spatial pattern in the grazing activity of the euphausiids within the region of investigation. The average daily rations of the euphausiids examined were < 2 % of their body carbon. The low daily ration of the euphausiids could be ascribed to the predominance of small picophytoplankton in the region of investigation, which are too small to be grazed efficiently by larger zooplankton. The marked spatial patterns in species composition and the elevated abundance and biomass of euphausiids, suggest that the mesoscale eddies contribute to the spatial and temporal heterogeneity of the planktonic community of the PFZ and may represent important foraging regions for many of the apex predators within the region.]]> Thu 13 May 2021 04:21:56 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:3163 Thu 13 May 2021 04:18:50 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10764 Thu 13 May 2021 03:57:57 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6128 Thu 13 May 2021 03:19:14 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6100 Thu 13 May 2021 02:52:45 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:3247 Thu 13 May 2021 02:51:06 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:8537 Thu 13 May 2021 02:17:23 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:1634 Thu 13 May 2021 02:10:21 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4772 Thu 13 May 2021 02:09:29 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6337 Thu 13 May 2021 01:38:39 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:8550 Thu 13 May 2021 01:38:32 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:35714 Thu 13 May 2021 01:28:52 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:950 Thu 13 May 2021 01:22:17 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4188 Thu 13 May 2021 01:17:07 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:2769 Thu 13 May 2021 01:02:51 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:9487 Thu 13 May 2021 00:52:06 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5651 Thu 13 May 2021 00:19:52 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:1139 Thu 13 May 2021 00:12:51 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6491 Thu 11 Aug 2022 07:04:31 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:56242 Thu 08 Sep 2022 22:07:59 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:40623 Thu 01 Feb 2024 09:06:41 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:40621 Thu 01 Feb 2024 09:06:14 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6832 Mon 30 Aug 2021 14:45:03 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:56612 Mon 19 Sep 2022 21:37:27 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:43718 Mon 19 Jul 2021 09:22:42 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:56866 Mon 03 Oct 2022 13:02:57 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6948 Mon 03 Apr 2023 12:03:17 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6630 Fri 02 Jul 2021 09:09:29 SAST ]]>