https://commons.ru.ac.za/vital/access/manager/Index en-us 5 https://commons.ru.ac.za/vital/access/manager/Repository/vital:5267 Wed 12 May 2021 23:08:08 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5209 Wed 12 May 2021 20:48:32 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5337 Wed 12 May 2021 20:26:41 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5273 Wed 12 May 2021 20:22:17 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5224 0.05). The length-frequency distribution analysis revealed that the three species had the same growth rate regardless of habitat type. However, females grew faster than males. An investigation of reproductive biology showed that the three species have low fecundity and they are asynchronous spawners, with a breeding peak during August and September period. Furthermore, the length-fecundity relationships for L. ''pinkhead'', and 0. argyrosoma "red" indicated that fecundity was more closely related to length in the south eastern side than in the south western side. Based on the above characteristics of L. ''pinkhead'', 0. argyrosoma "red" and C. cf virginalis, and the substrate types, it was strongly suggested that the existing sanctuary (lightly fished) in the south eastern side of the lake could immediately be enlarged to conserve the fish stocks, favourable substratum and aquatic animals that may be of tourists concern.]]> Wed 12 May 2021 20:03:44 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5219 Wed 12 May 2021 19:45:13 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5195 Wed 12 May 2021 19:21:00 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5238 Wed 12 May 2021 19:13:28 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5226 Wed 12 May 2021 19:02:54 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5233 Wed 12 May 2021 18:40:31 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5250 Wed 12 May 2021 17:37:53 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5318 Wed 12 May 2021 17:10:01 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5275 Wed 12 May 2021 16:51:30 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5236 Wed 12 May 2021 16:33:21 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5232 Thu 13 May 2021 10:47:23 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5197 0.05) in the specific growth rates, feed efficiencies and body composition were recorded for fish fed 2, 3 and 4 times a day. Feed intake was used to calculate an optimal daily ration and feeding two meals a day resulted in an optimal daily ration of 4% BW/day. A gut evacuation time of 7.25 hours indicates that fish fed twice a day probably had sufficient time to digest their food and evacuate their guts, resulting in the same daily feed intake as fish given 3 and 4 meals a day. Results conclude that under the present experimental conditions, a minimum daily ration of 4% BW/day, fed twice a day (in the morning and evening) is required for optimal growth (SGR= 1.33± 0.1), feed efficiency (FCR= 1.96± 0.4; PER= 1.44± 0.2) and body composition in juvenile dusky kob.]]> Thu 13 May 2021 08:53:20 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5276 Thu 13 May 2021 07:02:09 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5292 Thu 13 May 2021 04:43:08 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5216 Thu 13 May 2021 03:59:10 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5293 Thu 13 May 2021 03:51:38 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5320 Thu 13 May 2021 03:49:06 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5316 Thu 13 May 2021 01:48:14 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5274 Thu 13 May 2021 01:47:33 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5244 7,0), or on nitrate or calcium levels, and did not conclusively increase the redox potential of the water. Residual ozone concentrations up to 0,04 mg/l in a sixhour treatment had no harmful effects on rainbow trout, and there were no signs of gas-bubble disease arising from supersaturation of the water with oxygen. Activated carbon filters were effective at removing residual ozone from the water after treatment. Treatment of the water with oxygen alone had no effect on nitrite concentrations.]]> Thu 13 May 2021 00:46:52 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5196 Thu 13 May 2021 00:11:20 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5270 Sun 16 Jun 2024 07:30:41 SAST ]]>