${session.getAttribute("locale")} 5 Some life-history parameters of the non-native amphipod Platorchestia platensis (Talitridae) in a warm temperate South African estuary Wed 06 Nov 2019 12:09:40 SAST ]]> Seasonality, behaviour and philopatry of spotted ragged tooth sharks Carcharias taurus in Eastern Cape nursery areas, South Africa Wed 06 Nov 2019 09:52:51 SAST ]]> A comparison of three techniques for fluorochrome marking of juvenile Clarias gariepinus otoliths Tue 29 Oct 2019 12:18:16 SAST ]]> A histological description of ovarian recrudescence in two Labeo victorianus populations Tue 29 Oct 2019 12:11:17 SAST ]]> A description of gametogenesis in the panga Pterogymnus laniarius (Pisces: Sparidae) with comments on changes in maturity patterns over the past two decades Tue 29 Oct 2019 12:11:14 SAST ]]> A qualitative ecological risk assessment of the invasive Nile tilapia, Oreochromis niloticus in a sub-tropical African river system (Limpopo River, South Africa) Tue 29 Oct 2019 12:04:20 SAST ]]> Adult African sharptooth catfish, Clarias gariepinus, population dynamics in a small invaded warm-temperate impoundment 150 cm TL, >30 kg; Bruton 1976), long-lived (validated to at least 15 years, Weyl & Booth 2008) and fast-growing (Bruton & Allanson 1980; Quick & Bruton 1984; Richardson et al. 2009) fish that attains sexual maturity within two years of age (de Moor & Bruton 1988). It is eurythermic (80–35°C), mesohalic (0–10 ppt) and has the ability to airbreathe. These attributes predispose it to surviving in all but the most adverse of conditions and have directly contributed to its wide use as an aquaculture species. These attributes have also contributed to its ability to invade waterbodies beyond its natural range (de Moor & Bruton 1988) and after inadvertent introductions such as by escape from aquaculture facilities or through water transfer schemes, C. gariepinus has established populations in many non-native environments. Such invasions include the Philippines (Mercene 1997), Bangladesh (Arthur & Ahmed 2002), Thailand (Vidthayanon 2005), India (Bhakta & Bandyopadhyay 2007) and Brazil (Cambray 2005; Vitule et al. 2006; Rocha & Schiavetti 2007). In South Africa, C. gariepinus invaded the temperate Great Fish River catchment after the species was translocated from the Orange River through a Interbasin Water Transfer (IBWT) scheme (Laurenson et al. 1989). Potential threats include predation of and competition with indigenous species, habitat degradation, and the spread of diseases and parasites (Dudgeon et al. 2006).]]> Tue 29 Oct 2019 12:04:18 SAST ]]> An assessment of a light-attraction fishery in southern Lake Malawi Tue 29 Oct 2019 11:57:17 SAST ]]> Age validation, growth, mortality, and demographic modeling of spotted gully shark (Triakis megalopterus) from the southeast coast of South Africa 0.05), and von Bertalanffy growth model parameters for combined sexes were estimated to be L∞=1711.07 mm TL, k=0.11/yr and t0= –2.43 yr (n=86). Natural mortality was estimated at 0.17/yr. Age at maturity was estimated at 11 years for males and 15 years for females. Results of the demographic analysis showed that the population, in the absence of fishing mortality, was stable and not significantly different from zero and particularly sensitive to overfishing. At the current age at first capture and natural mortality rate, the fishing mortality rate required to result in negative population growth was low at F>0.004/ yr. Elasticity analysis revealed that juvenile survival was the principal factor in explaining variability in population growth rate.]]> Tue 29 Oct 2019 11:57:14 SAST ]]> An endangered seahorse selectively chooses an artificial structure Tue 29 Oct 2019 11:50:21 SAST ]]> An invader within an altered landscape: one catfish, two rivers and an inter-basin water transfer scheme Tue 29 Oct 2019 11:50:19 SAST ]]> Aspects of the reproductive biology of monkfish Lophius vomerinus off Namibia 50cm total length was strongly biased towards females. There was reproductive activity throughout the year, peaking slightly between autumn and spring.]]> Tue 29 Oct 2019 11:43:15 SAST ]]> Aspects of the biology and life history of largespot pompano, Trachinotus botla, in South Africa Tue 29 Oct 2019 11:43:15 SAST ]]> Assessment of the monkfish Lophius vomerinus resource off Namibia Tue 29 Oct 2019 11:43:14 SAST ]]> Computer-aided identification of coelacanths, latimeria chalumnae, using scale patterns Tue 29 Oct 2019 10:26:15 SAST ]]> Detecting impacts of invasive non-native sharptooth catfish, Clarias gariepinus, within invaded and non-invaded rivers. Tue 29 Oct 2019 10:19:14 SAST ]]> Ecological niche modeling of the invasive potential of Nile tilapia Oreochromis niloticus in African river systems: concerns and implications for the conservation of indigenous congenerics Tue 29 Oct 2019 09:58:14 SAST ]]> Effect of turbidity on the foraging success of Glossogobius callidus (Teleostei: Gobiidae) Tue 29 Oct 2019 09:51:14 SAST ]]> Reproductive and feeding biology of the Natal mountain catfish, Amphilius natalensis (Siluriformes: Amphiliidae) Tue 12 May 2020 15:57:12 SAST ]]> Quantifying the annual fish harvest from South Africa’s largest freshwater reservoir Tue 12 May 2020 11:36:37 SAST ]]> Reproductive biology of a riverine cyprinid, Labeo umbratus (Teleostei: Cyprinidae), in small South African reservoirs Tue 05 Nov 2019 11:34:52 SAST ]]> Pessimistic assessment of white shark population status in South Africa: comment on Andreotti et al.(2016) Thu 31 Oct 2019 15:19:10 SAST ]]> On the life history of the lesser gurnard (Scorpaeniformes: Triglidae) inhabiting the Agulhas Bank, South Africa Thu 31 Oct 2019 12:32:05 SAST ]]> On the life history of a cyprinid fish, Labeo cylindricus Thu 31 Oct 2019 12:21:48 SAST ]]> Movement patterns and habitat selection of invasive African sharptooth catfish Thu 31 Oct 2019 09:49:45 SAST ]]> Ocean warming, a rapid distributional shift, and the hybridization of a coastal fish species Thu 14 May 2020 16:23:51 SAST ]]> Predictor variables for moggel (Labeo umbratus) biomass and production in small South African reservoirs Sat 02 Nov 2019 15:32:15 SAST ]]> Environmental niche patterns of native and non-native fishes within an invaded African river system Mon 28 Oct 2019 16:02:00 SAST ]]> Establishment of translocated populations of smallmouth yellowfish, Labeobarbus aeneus (Pisces: Cyprinidae), in lentic and lotic habitats in the Great Fish River system, South Africa Mon 28 Oct 2019 16:01:59 SAST ]]> Estuarine use by spotted grunter Pomadasys commersonnii in a South African estuary, as determined by acoustic telemetry Mon 28 Oct 2019 15:54:59 SAST ]]> Factors affecting recapture rates of raggedtooth sharks Carcharias taurus tagged off the east coast of South Africa Mon 28 Oct 2019 15:19:59 SAST ]]> Growth and longevity of Exosphaeroma hylocoetes (Isopoda) under varying conditions of salinity and temperature Mon 28 Oct 2019 14:45:04 SAST ]]> Histological validation of gonadal macroscopic staging criteria for Labeo cylindricus (Pisces: Cyprinidae) Mon 28 Oct 2019 14:38:04 SAST ]]> Growth, reproduction and population structure of Diplotaxodon limnothrissa in the southeast arm of Lake Malawi Mon 28 Oct 2019 14:38:04 SAST ]]> Indicators of sustainable fishing for South African sardine Sardinops sagax and anchovy Engraulis encrasicolus Mon 28 Oct 2019 13:07:04 SAST ]]> Induced ovulation, spawning, egg incubation, and hatching of the cyprinid fish Labeo victorianus in captivity Mon 28 Oct 2019 13:00:06 SAST ]]> Incorporating the spatial component of fisheries data into stock assessment models Mon 28 Oct 2019 13:00:03 SAST ]]> Integrating stomach content and stable isotope analyses to elucidate the feeding habits of non-native sharptooth catfish Clarias gariepinus Mon 28 Oct 2019 12:46:00 SAST ]]> Inter-seasonal persistence and size-structuring of two minnow species within headwater streams in the Eastern Cape, South Africa Mon 28 Oct 2019 12:45:59 SAST ]]> Life history and population dynamics of invasive common carp, Cyprinus carpio, within a large turbid African impoundment Mon 28 Oct 2019 12:31:58 SAST ]]> Life-history characteristics of an age-validated established invasive African sharptooth catfish, Clarias gariepinus, population in a warm–temperate African impoundment Mon 28 Oct 2019 12:25:02 SAST ]]> Long-term catch and effort trends in Eastern Cape Angling Week competitions Mon 28 Oct 2019 12:25:00 SAST ]]> Life history strategy and population characteristics of an unexploited riverine cyprinid, Labeo capensis, in the largest impoundment in the Orange River Basin Mon 28 Oct 2019 12:24:59 SAST ]]> Marine Reserves: a guide to science, design, and use Mon 28 Oct 2019 12:17:58 SAST ]]> Retrospective stock assessment of the Emperor red snapper (Lutjanus sebae) on the Seychelles Bank between 1977 and 2006 Mon 04 Nov 2019 11:54:21 SAST ]]> Reproductive biology of ningu, Labeo victorianus (pisces: cyprinidae), in the kagera and Sio rivers, Uganda Mon 04 Nov 2019 11:15:16 SAST ]]> Rapid biological assessment of the fishery potential of Xonxa Dam, near Queenstown, South Africa Fri 01 Nov 2019 15:01:30 SAST ]]> Quantifying commercial catch and effort of monkfish Lophius vomerinus and L. vaillanti off Namibia Fri 01 Nov 2019 14:45:27 SAST ]]> Preliminary observations of tag shedding, tag reporting, tag wounds, and tag biofouling for raggedtooth sharks (Carcharias taurus) tagged off the east coast of South Africa Fri 01 Nov 2019 14:32:43 SAST ]]>