Relevant bibliographies by topics / Loligo fisheries – South Africa

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  2. Dissertations / Theses
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Academic literature on the topic 'Loligo fisheries – South Africa'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 February 2022

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Journal articles on the topic "Loligo fisheries – South Africa"

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Branch, G. M. "Subsistence fisheries in South Africa: a Preface." South African Journal of Marine Science 24, no. 1 (June 2002): 403–4. http://dx.doi.org/10.2989/025776102784528655.

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Cockcroft, Andrew C., and Andrew IL Payne. "A cautious fisheries management policy in South Africa: the fisheries for rock lobster." Marine Policy 23, no. 6 (November 1999): 587–600. http://dx.doi.org/10.1016/s0308-597x(98)00045-1.

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Lipiński, M. R. "Food and feeding of Loligo vulgaris reynaudii from St Francis Bay, South Africa." South African Journal of Marine Science 5, no. 1 (June 1, 1987): 557–64. http://dx.doi.org/10.2989/025776187784522513.

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Wickens, P. A., D. W. Japp, P. A. Shelton, F. Kriel, P. C. Goosen, B. Rose, C. J. Augustyn, C. A. R. Bross, A. J. Penney, and R. G. Krohn. "Seals and fisheries in South Africa — competition and conflict." South African Journal of Marine Science 12, no. 1 (June 1992): 773–89. http://dx.doi.org/10.2989/02577619209504741.

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Mather, Charles. "Sustainability and Fisheries Reform in Post-Apartheid South Africa." Geography 92, no. 3 (November 1, 2007): 221–30. http://dx.doi.org/10.1080/00167487.2007.12094202.

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Harris, J. M., G. M. Branch, B. M. Clark, A. C. Cockcroft, C. Coetzee, A. H. Dye, M. Hauck, et al. "Recommendations for the management of subsistence fisheries in South Africa." South African Journal of Marine Science 24, no. 1 (June 2002): 503–23. http://dx.doi.org/10.2989/025776102784528420.

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Plagányi, Éva E., Rebecca A. Rademeyer, Doug S. Butterworth, Carryn L. Cunningham, and Susan J. Johnston. "Making management procedures operational—innovations implemented in South Africa." ICES Journal of Marine Science 64, no. 4 (May 1, 2007): 626–32. http://dx.doi.org/10.1093/icesjms/fsm043.

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Abstract Plagányi, É. E., Rademeyer, R. A., Butterworth, D. S., Cunningham, C. L., and Johnston, S. J. 2007. Making management procedures operational — innovations implemented in South Africa. – ICES Journal of Marine Science, 64: 626–632. Operational management procedures (OMPs) have become an indispensable fisheries management tool in South Africa in light of their ability to consider the consequences of the main sources of assessment uncertainty. An overview is provided of the MP approaches applied to the major South African fisheries for hake, sardine and anchovy, and west coast rock lobster. As these are among the first OMPs to be implemented worldwide, some for periods longer than 10 y, they provide useful examples of some of the successes and problems encountered with the approach. Particular emphasis is given to some recent innovations and adaptations. These include moves to (i) joint two-species OMPs for the hake and sardine/anchovy resources; (ii) a reference set of weighted operating models for primary testing and tuning in preference to a single model; (iii) consideration of a “research-conditional” approach for hake to allow greater catches in the short term, conditional on research being implemented to resolve a key uncertainty; and (iv) incorporation of some ecosystem considerations by developing appropriate robustness tests (which link with moves towards an ecosystem approach to fisheries). Key lessons gained from experience over the past decade of OMP implementation in South Africa are summarized.
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Sauer, W. H. H., Y. C. Melo, and W. de Wet. "Fecundity of the chokka squid Loligo vulgaris reynaudii on the southeastern coast of South Africa." Marine Biology 135, no. 2 (November 5, 1999): 315–19. http://dx.doi.org/10.1007/s002270050629.

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Smale, Malcolm J., Warwick H. H. Sauer, and Roger T. Hanlon. "Attempted Ambush Predation on Spawning Squids LoligoVulgaris Reynaudii by Benthic Pyjama Sharks, PorodermaAfricanum, off South Africa." Journal of the Marine Biological Association of the United Kingdom 75, no. 3 (August 1995): 739–42. http://dx.doi.org/10.1017/s002531540003914x.

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This first description of behavioural interactions between benthic pyjama sharks Poroderma africanum (Chondrichthyes: Scyliorhinidae) and spawning squids Loligo vulgaris reynaudii (Cephalopoda: Loliginidae) was made from underwater video recordings. The behaviours are described and illustrated to show that the sharks searched for squids in egg beds, then rested there partially hidden and immobile. The pyjama sharks at-tempted to ambush the squids when they approached to lay their eggs after they had apparently habituated to the predators. Although normally nocturnal, the pyjama sharks had emerged by day from caves and cracks in the rocky reef to attack the spawning squids, thereby benefiting from an occasionally available resource.
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Singh, Rishan. "The progresses in fishery sciences and fisheries in South Africa and overseas." Bulletin of Pure & Applied Sciences- Zoology 37a, no. 1 (2018): 39. http://dx.doi.org/10.5958/2320-3188.2018.00004.9.

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Dissertations / Theses on the topic "Loligo fisheries – South Africa"

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Schön, Pieter-Jan. "An investigation into the influence of the environment on spawning aggregations and jig catches of chokka squid Loligo Vulgaris reynaudii off the south coast of South Africa." Thesis, Rhodes University, 2000. http://hdl.handle.net/10962/d1016369.

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Erratic and highly variable catches in the South African chokka squid Loligo vulgaris reynaudii fishery, cause socio-economic hardship for the industry and uncertainty for resource managers. Catch forecasting can reduce this problem as it is believed that catch variability is strongly influenced by environmental factors. In this study, data were collected at varying temporal and spatial scales. Data for the hourly time-scale study were collected from 1996-1998, aboard commercial vessels, whilst for the longer time-scales, data were extracted for Kromme Bay (a single fishing area) from existing databases (1991-1998) that were comprised of compulsory catch returns and oceanographic data. The environment-catch relationship for chokka squid on the inshore spawning grounds was then investigated using multiple correlation and regression analysis, analysis of variance, contingency table analysis and cross-correlation statistical techniques. This simple, direct, 'black box' statistical approach was relatively successful in developing a predictive capability. On a short time-scale (hourly), the regression model accounted for 32% of the variability in catch, with turbidity the main determinant (13%). On a daily monthly time-scale, the best prediction model was on a monthly scale, accounting for 40% of the variability in catch. The principal determinant, bottom temperature anomaly (11 %), was found to lag one month forward. Seasonal and diel catch variations induced changes in the relative importance of turbidity, water temperature and wind direction on catches. A strong, positive relationship was found between easterly winds (which cause upwelling) and catch, particularly in summer. Catch rates, however, decreased with an increase in turbidity. The correlation between temperature and catch was generally negative, however, higher catches were associated with a temperature range of 13-18°C. Highest catch rates were associated with easterly winds, zero turbidity conditions and sea surface temperatures from 15.0-16.9°C. Selected case studies (in situ observations) suggested that upwelling and turbidity events act as environmental triggers for the initiation or termination of the spawning process, respectively. A holistic approach is required to improve predictive capability of chokka squid abundance. Although short-term predictability remains essential (i.e. hourly-scale), future research should concentrate on long-term prediction models (e.g., monthly time-scales) involving greater spatial variation, which are the most important for management.
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Downey, Nicola Jean. "The role of the deep spawning grounds in chokka squid (Loligo reynaudi d'orbigny, 1845) recruitment." Thesis, Rhodes University, 2014. http://hdl.handle.net/10962/d1011867.

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It was previously thought that the South African chokka squid Loligo reynaudi is exclusively an inshore, shallow water spawner. Although spawning mostly within shallow bays (<60 m) the presence of squid eggs in trawls at depths up to 130 m indicates this species frequently makes use of deeper spawning areas on the mid-shelf. The extent of mid-shelf spawning (referred to as deep spawning) and the contribution to recruitment has yet to be assessed. Studies have shown mid-shelf bottom temperature to vary considerably from those inshore, suggesting chokka squid spawn in two very different oceanographic environments. Considering these apparent environmental differences, what leads to the mid-shelf environment becoming a suitable spawning habitat? Does a suitable benthic habitat, required for the attachment of egg pods, occur on the mid-shelf? These questions are not only important for determining the extent of deep spawning, but also to the understanding of factors “driving” deep spawning. The fate of deep spawned hatchlings is another unknown. It has been proposed that the main chokka squid inshore spawning grounds are positioned to exploit the net westward currents on the Eastern Agulhas Bank, i.e. paralarvae would be transported west from the hatching site to the cold ridge, an area of high primary and secondary productivity on the Central Agulhas Bank. This concept has come to be known as the Western Transport Hypothesis. Lagrangian ROMS-IBMs (regional ocean model system – individual-based model) predict the net westward transport of paralarvae from both the inshore and deep spawning grounds, to the cold ridge. These simulations were used to investigate the transport of hatchlings to the cold ridge feeding grounds before the exhaustion of yolk reserves. The fate of paralarvae on reaching the feeding grounds has not yet been investigated. This work has contributed new knowledge to our understanding of deep spawning and its role in recruitment. Specific aims of this study were to (1) determine the extent, range and importance of the deep spawning grounds relative to those inshore; (2) investigate the deep spawning ground habitat (Agulhas Bank mid-shelf) morphology and oceanographic environment; (3) determine the transport and survival of deep spawned hatchlings; and (4) investigate the origin and distribution of chokka squid paralarvae on the Agulhas Bank. The extent, depth range and importance of the deep spawning grounds, relative to those inshore was assessed using 23 years of demersal trawl survey data. Data for both the west and south coasts of South Africa were examined for egg capsules. No spawning was found on the west coast. Data showed that chokka squid preferred the Eastern Agulhas Bank for spawning. Spawning occurred not only inshore but also on the mid-shelf extending to depths of 270 m near the shelf edge. The majority of deep spawned eggs however, were found in the depth range 71-130 m. Squid egg density markedly decreased beyond 70 m, suggesting delineation between the inshore and deep spawning grounds. Total egg biomass calculations for depths shallower and deeper than 70 m indicated the coastal area to be strongly favoured, i.e. 82 vs. 18%. These results contest the commonly accepted notion that chokka squid is an inshore spawner and redefine the spawning grounds to extend across the shelf. Apart from an initial study investigating bottom temperature on the mid-shelf, very little is known about the deep spawning habitat. St Francis Bay, a commonly used spawning location, was chosen as a demonstration area for further study. The deep spawning grounds (71-130 m) were mapped and benthic habitat described from underwater video footage. A study investigating cross-shelf bottom conditions was undertaken off Thys Bay. CTD data were used to compare seasonal bottom temperature and oxygen on the St Francis Bay inshore and deep spawning grounds. Squid movement between the two spawning habitats was assessed using filament tagging. Predation and fishing pressure across the spawning grounds was reviewed. The mid-shelf benthic habitat was found to be similar to that inshore and available for spawning. Despite the generally colder bottom temperatures on the mid-shelf, this study showed that bottom temperature in deeper waters can at times be warmer than inshore. Although mid-shelf warming events lasted from a few hours to a number of days, they resulted in similar conditions to those on the inshore spawning grounds. It is likely these events act to expand or shift spawning habitat. The movement of squid between the two spawning habitats makes it possible for them to seek patches of warm bottom water with appropiate substrate. This suggests they are spawning habitat opportunists. Predation and fishing pressure appear to be higher on the inshore spawning grounds. It is feasible that this also forces spawners to seek out more favourable habitat offshore. An individual-based model was used to predict the fate of mid-shelf and inshore hatched paralarvae. Within the model, both the highly productive cold ridge and inshore spawning grounds were considered feeding or nursery areas. Paralarvae were released from six inshore and six deep spawning sites, spanning the coast between Port Alfred and Knysna. All paralarvae not reaching the feeding areas before the exhaustion of yolk-reserves (≤5 days), not retained within the feeding grounds (≥14 days), and not retained on the Agulhas Bank after exiting the feeding grounds were considered lost. This work illustrated the dependence of paralarval transport success on both spawning location and time of hatching, as established in earlier studies. The current IBM has expanded on initial work, emphasizing the importance of the cold ridge and inshore spawning grounds as nursery areas for deep and inshore spawned paralarvae, respectively. This work has highlighted the complex interactions between processes influencing recruitment variability for chokka squid. Possible relationships between periods of highest recruitment success and spawning peaks were identified for both spawning habitats. Based on the likely autumn increase in deep spawning off Tsitsikamma, and the beneficial currents during this period, it can be concluded deep spawning may at times contribute significantly to recruitment. This is particularly true for years where the cold ridge persists into winter. Data on chokka squid paralarval distribution are scarce. Paralarval distribution and abundance, in relation to Agulhas Bank oceanography, was investigated using bongo caught paralarvae and corresponding oceanographic data. Individual-based models (IBMs) were used to predict the origin or spawning site of the wild caught paralarvae, with reference to inshore versus deep spawning. Although failing to predict realistic points of origin, this study provided evidence to support a number of scenarios previously assumed to influence chokka squid recruitment. First is the possible influence of coastal upwelling on the retention, and hence spatial distribution, of paralarvae on the inshore spawning grounds. The second factor thought to impact recruitment is the loss of paralarvae from the Agulhas Bank ecosystem. This study confirmed the removal of paralarvae from the Eastern Agulhas Bank due to Agulhas Current boundary phenomena and resultant offshelf leakage. In addition, data suggested that the formation of the cold ridge could enhance retention on the Central Agulhas Bank, and so prevent offshelf leakage from the Central and Western Agulhas Bank. A synthesis of the main conclusions is presented. Implications of the findings and directions for future research are discussed.
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McCafferty, James Ross. "An assessment of inland fisheries in South Africa using fisheries-dependent and fisheries-independent data sources." Thesis, Rhodes University, 2012. http://hdl.handle.net/10962/d1005072.

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The role of inland fisheries as contributors to local and national economies in developing African countries is well documented. In South Africa, there is increasing interest in inland fisheries as vehicles for achieving national policy objectives including food security, livelihoods provision, poverty alleviation and economic development but there is surprisingly little literature on the history, current status, and potential of inland fishery resources. This lack of knowledge constrains the development of management strategies for ensuring the biological sustainability of these resources and the economic and social sustainability of the people that are dependent on them. In order to contribute to the knowledge base of inland fisheries in South Africa this thesis: (1) presents an exhaustive review of the available literature on inland fisheries in South Africa; (2) describes the organisation of recreational anglers (the primary users of the resource); (3) compiles recreational angling catch records and scientific gill net survey data, and assesses the applicability of these data for providing estimates of fish abundance (catch-per-unit effort [CPUE]); and finally, (4) determines the potential for models of fish abundance using morphometric, edaphic, and climatic factors. The literature review highlighted the data-poor nature of South African inland fisheries. In particular information on harvest rates was lacking. A lack of knowledge regarding different inland fishery sectors, governance systems, and potential user conflicts was also found. Recreational anglers were identified as the dominant user group and catch data from this sector were identified as potential sources of fish abundance and harvest information. Formal freshwater recreational angling in South Africa is a highly organised, multi-faceted activity which is based primarily on angling for non-native species, particularly common carp Cyprinus carpio and largemouth bass Micropterus salmoides. Bank anglers constituted the largest number of formal participants (5 309 anglers affiliated to formal angling organisations) followed by bass anglers (1 184 anglers affiliated to formal angling organisations). The highly structured nature of organised recreational angling and dominant utilisation of inland fisheries resources by this sector illustrated not only the vested interest of anglers in the management and development of inland fisheries but also the role that anglers may play in future decision-making and monitoring through the dissemination of catch data from organised angling events. Generalised linear models (GLMs) and generalised additive models (GAMs) were used to standardise CPUE estimates from bass- and bank angling catch records, which provided the most suitable data, and to determine environmental variables which most influenced capture probabilities and CPUE. Capture probabilities and CPUE for bass were influenced primarily by altitude and conductivity and multiple regression analysis revealed that predictive models incorporating altitude, conductivity, surface area and capacity explained significant (p<0.05) amounts of variability in CPUE (53%), probability of capture (49%) and probability of limit bag (74%). Bank angling CPUE was influenced by conductivity, surface area and rainfall although an insignificant (p>0.05) amount of variability (63%) was explained by a predictive model incorporating these variables as investigations were constrained by small sample sizes and aggregated catch information. Scientific survey data provided multi-species information and highlighted the high proportion of non-native fish species in Eastern Cape impoundments. Gillnet catches were influenced primarily by species composition and were less subject to fluctuations induced by environmental factors. Overall standardised gillnet CPUE was influenced by surface area, conductivity and age of impoundment. Although the model fit was not significant at the p<0.05 level, 23% of the variability in the data was explained by a predictive model incorporating these variables. The presence of species which could be effectively targeted by gillnets was hypothesised to represent the most important factor influencing catch rates. Investigation of factors influencing CPUE in impoundments dominated by Clarias gariepinus and native cyprinids indicated that warmer, younger impoundments and smaller, colder impoundments produced higher catches of C. gariepinus and native cyprinids respectively. A predictive model for C. gariepinus abundance explained a significant amount of variability (77%) in CPUE although the small sample size of impoundments suggests that predictions from this model may not be robust. CPUE of native cyprinids was influenced primarily by the presence of Labeo umbratus and constrained by small sample size of impoundments and the model did not adequately explain the variability in the data (r² = 0.31, p>0.05). These results indicate that angling catch- and scientific survey data can be useful in providing predictions of fish abundance that are biologically realistic. However, more data over a greater spatial scale would allow for more robust predictions of catch rates. This could be achieved through increased monitoring of existing resource users, the creation of a centralised database for catch records from angling competitions, and increased scientific surveys of South African impoundments conducted by a dedicated governmental function.
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Van, der Vyver Johan Samuel Frederik. "The geographic stock structure of chokka squid, Loligo Reynaudi, and its implications for management of the fishery." Thesis, Rhodes University, 2014. http://hdl.handle.net/10962/d1012973.

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It is currently hypothesised that the chokka squid (Loligo reynaudi) consist of a single stock. This was tested through a spatial comparison of the morphology of this species. Forty three morphometric characters were measured from 1079 chokka squid collected from three regions: the south coast of South Africa, the west coast of South Africa, and southern Angola. While no significant differences were found for the hard body parts, results from discriminant function analyses showed the soft body morphometric characters from each of the three regions differed, with an overall correct classification rate of 100% for males and 99% for females in all three regions. Due to the existing model being used to assess the resource currently being updated it was not feasible to apply this model to the area-disaggregated data from this study. Rather, the CPUE trends and catches from the area-disaggregated data were compared against those of the area-aggregated data, as a first attempt to discern any appreciable differences which would suggest the use of disaggregated data in future assessments. Both the trawl and jig CPUE trends from the area-disaggregated analysis differed only slightly from those of the area-aggregated data. Similarly, the spring and autumn biomass trends for the main spawning area (east of 22°E) followed the same trends as for the full area. It is therefore concluded that there is currently no need to assess the resource on an area-disaggregated basis.
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Downey, Nicola Jean. "The effect of temperature and turbidity on spawning chokka squid, loligo reynaudii, in Eastern Cape waters." Thesis, Nelson Mandela Metropolitan University, 2009. http://hdl.handle.net/10948/945.

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Several studies suggest the environment influences chokka squid catches which are mostly based on the successful formation of inshore spawning aggregations. None of the evidence, however, is direct observation. Acoustic telemetry offers a means to determine the response of spawners to changes in the environment and insight into the behaviour of spawning squid. A hexagonal array of VR2 receivers deployed 500 m apart was deemed to be ideal to monitor the movement patterns of squid on the spawning sites. In isothermic conditions, an area up to 1.28 km2 could be monitored as there was an approximate 50 m overlap in individual VR2 receiver range. In thermocline conditions however, “acoustic dead zones” as wide as 350 m may have existed between VR2 receivers, limiting the performance of this configuration. Similarly benthic turbidity events would also decrease detection range and limit performance. A hexagonal array of VR2 receivers was moored in Kromme Bay on and around active spawning aggregations during the squid fishery closed seasons of November 2003, 2004, 2005 and 2006. Squid were caught on jigs and tagged with V9 acoustic pressure telemetry transmitters. A total of 45 animals were tagged. Presence-absence analysis identified three general behaviours: (1) arrival at dawn and departure after dusk, (2) a continuous and uninterrupted presence for a number of days and (3) presence interrupted by frequent but short periods of absence. Overall, the data suggests frequent migrations between spawning aggregations and offshore feeding grounds. The pressure sensor data showed both males and females stayed persistently near the seabed during the day, but at night, this pattern was broken with common activity higher up in the water column. The squid did not remain exclusively in the water column and regularly made excursions to the seabed. CTD and temperature data indicated the intrusion of a cold bottom layer due to upwelling at the monitored spawning sites on a number of occasions. The formation of spawning aggregations appears to be triggered by upwelling events and spawning behaviour, once initiated, disrupted by upwelling events with a rapid onset, possibly due to an inability to adapt physiologically over such a short time period.
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Mbane, Nontuthuzelo Nosisa. "The South African marine fisheries policy since 1994." Thesis, Cape Technikon, 2004. http://hdl.handle.net/20.500.11838/1664.

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Dissertation (MTech( Public Management))--Cape Technikon, Cape Town, 2004
Marine resources play a major role in sustaining the economy and social development of the nation and contribute to national economy, to employment and security of the local community. The South African fisheries management was conducted largel)' with political default. This denied most fishers access to marine resources. Since the democratic election of 1994, the government was left with the challenge to re-allocate rights in a way that would ensure that the under-presentation of historical disadvantaged individuals (HDl's) in the fishing industry would be corrected. The laws and regulations related to marine fisheries were also revised. The Marine Living Resources Act, No. 18 of 1998 attempted transformation in the fishing industry but lacked clear guidelines which led to litigation and crises in the fishing industry as many fishers were unhappy with the whole process. Marine fisheries policy was established and published in 1997 to address those historical imbalances by introducing the fishing right system of allocating rights to represent the national demographics of the country. This report seeks to describe the theory of the South African fishing industry, policy developments and the current status of permit allocation in South Africa. It will also examine the effectiveness in the implementation of the marine fisheries policy for South Africa. It will focus on the distribution of marine resources for commercial fishing purposes.
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Mather, Diarmid John. "Fishing rights, redistribution and policy : the South African commercial T.A.C. fisheries." Thesis, Rhodes University, 2005. http://hdl.handle.net/10962/d1007531.

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The main objective of this thesis is to provide an analysis of the economic logic behind fisheries policy and redistribution in South African. An examination of the institutional and organizational evolution reveals that South African fisheries policy followed the world trend in the movement toward quota management systems. However, it is argued that due to the peculiarities of the Apartheid political system, South Africa developed a unique and persistent structure of individual fishing rights that resulted in a transfer of power from the fisher to monopsonistic, and subsequently vertically integrated, fish processing companies. Problems, however, arose with the need to redistribute fishing rights to previously repressed racial groups. It is proposed that, within a specific form (TAC), the structure of individual fishing rights can be decomposed into four operational rules, namely, the right of participation, asset size, tradability and duration of term. Policy design is restricted to a feasible set of rules that impact on the flexibility of the system, the incentives facing private fishing companies and fishers, the efficiency of the fisheries management plan and finally the effect it has on a redistribution strategy. Within this analytical framework, South Africa's policy yields a very flexible system favourable to monopsonistic industrial organisation. However, by adding a redistribution constraint, this structure has a number of important effects. First, as new quota holders are added the information costs for effective fisheries management increase exponentially. Second, the transaction costs to private fishing companies are increased. Third, only the resource rent is redistributed (weak redistribution). Next, the micro to small vessel fisheries, the medium vessel fisheries and the large vessel fisheries are examined separately. The major aim is to determine, within the available data, the effect that a weak redistribution policy (redistribution of the resource rent), has on strong redistribution (redistribution of fishing capital and skills). The evidence definitely supports the analytical framework and suggests that fundamentally the structure of individual fishing rights, which evolved in response to a monopsonistic industrial organisation during the apartheid era in South Africa, works against strong redistribution. Also, that different fisheries face different constraints and that these should in certain instances be treated separately.
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Brouwer, Stephen Leonard. "An assessment of the South African east coast linefishery from Kei Mouth to Stil Bay." Thesis, Rhodes University, 1998. http://hdl.handle.net/10962/d1005076.

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During the period April 1994 and February 1996 as part of an investigation into the national Iinefishery, the east coast shore fishery and the recreational and commercial ski-boat fisheries were surveyed, at eight sites between Kei Mouth in the East and Stil Bay in the West. Roving creel, access point and aerial surveys were used. A questionnaire was developed for each sector to gather data on catch and effort, fisher demographics, economics, fisher attitudes towards, and knowledge of, the current management regulations and assess the efficacy of the fisheries inspectorate. During the access point survey the catch of 3273 fishers was inspected and 1556 interviews were conducted. Questionnaires were conducted on 118 recreational ski-boaters and the catch of 165 boats was inspected. 96 commercial skippers were interviewed and 230 had their catch inspected. Three aerial surveys of the entire area were conducted during which a total of 1067 shore fishers were counted giving a shore fisher density of 0.39 fishers.km⁻¹. The majority (99%) of participants in all sectors of the linefishery were male. The greatest number of participants were white, shore fishery 77% recreational ski-boat 98% commercial skiboat 89%, followed by coloured, asian and black people. To a large extent this reflects the income of various racial groups. Most fishers supported the current linefish management plan. However, when tested on their knowledge of the size limits, bag limits and closed seasons of their target species many shore fishers (59%) did not know them and a high proportion of fishers in all sectors had disobeyed at least one of the regulations (shore 50%, recreational ski-boat 70%, commercial ski-boat 56%). When compared to historical data the present catch per unit effort (CPUE) in all sectors has decreased. Most interviewees in the various sectors did not accept responsibility for the decline in CPUE, but attributed it to three principal reasons vis their perceived direct competitors, trawling and pollution. Analysis of the catch revealed that all sectors were multispecies fisheries, with each sector being characterised by a small number of target species. Catch composition differed significantly between the shore and ski-boat sectors, but there was significant overlap between the two skiboat sectors. Analysis of the catch in comparison to that reported to the National Marine Linefish System (NMLS) revealed that there was a substantial degree of under-reporting. There was little seasonal difference in effort in the shore fishery while the recreational ski-boat effort was highest in the summer and the commercial ski-boat effort was high in the winter. Effort in the shore and recreational ski-boat fisheries was concentrated over weekends while the commercial ski-boat effort was highest during weekdays. Total effort for the entire area was estimated at 903 186 (±1913) fisher days per annum in the shore fishery, 24 357 (±685) recreational ski-boat fisher days and 64 266 (±1686) commercial ski-boat fisher days. Expenditure and capital investment in the various sectors was calculated, as were earnings of the participants in the commercial ski-boat sector. The linefishery in the Eastern Cape was estimated to have a minimum capital investment in excess of R210 million and more than R32 million is spent annually on running costs. The commercial ski-boat fishery directly employed an estimated 3184 people. The economic implications of changes in CPUE for the commercial ski-boat fishery are considered, as are the benefits of a recreational angling licence. Management of the linefishery is discussed in relation to the findings of this study.
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Japp, David William. "An assessment of the South African longline fishery with emphasis on stock integrity of kingklip, Genypterus capensis (Pisces : ophidiidae)." Thesis, Rhodes University, 1989. http://hdl.handle.net/10962/d1004660.

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The South African demersal longline experiment is assessed with emphasis on the target species, kingklip Genypterus capensis. The hypothesis that kingklip on the South African coast comprise a unit stock is tested. Recommendations for the management of the fishery are made. Longlining was found to be commercially viable. Techniques have been developed to target on either kingklip or the Cape hakes, Herluccius capensis and H. paradoxus. Longline fishermen exploit the kingklip spawner stock from August to No v ember by taking advantage of prespawning aggregations on the South-East Coast . Effort switches to the West Coast in late summer and early winter where kingklip are less abundant and a larger proportion of hake is caught. Catch rates of kingklip on the South Coast have declined sharply and the resource there has been exploited at a rate greater than that required to retain 50% of the unexploited biomass . There is a 17,6% probability that the spawner biomass on the South Coast has already been depleted below its pristine level. On the West Coast the catch rates of kingklip are lower than on the South Coast and have not changed significantly, although within the 95% confidence limits there is a possibility that the resource there has also been depleted below 50% of its pristine level. Genypterus capensis on the South African coast comprise a unit stock. Comparison of kingklip morphology using multivariate and discriminant function analysis and of otolith morphology using univariate statistics shows that there are no significant differences between the fish on the West and South Coasts. They are a slow growing species and were aged up to 25 years. Kingklip on the West Coast are smaller and have a lower L~ than those on the South Coast, but this is not a characteristic of discrete stocks. Kingklip on the South Coast mature earlier than those on the West Coast and aggregate to spawn on the South - East Coast in spring. There is no obvious spawning period on the West Coast. It is hypothesized that kingklip spawning on the South-East Coast is in response to favourable environmental conditions that enhances the survival of their eggs and larvae. It is recommended that demersal longlining be established as a permanent kingklip-directed fishery but that effort should not be allowed to increase. The West and South Coasts should be managed .separately. A TAC of 5 OOOt for kingklip should be introduced for 1989 of which 2 OOOt should be allocated to the West Coast and 3 OOOt to the South Coast . A closed season for kingklip from 1 August to 30 September on the South-East Coast is recommended. Hake-directed longlining should not be allowed as its effect on the hake spawner stocks are unknown and could be a potential threat to the stability of the demersal trawl fishery.
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10

Ngqongwa, Abongile. "Small-scale fisheries governance in South Africa using information management systems." Master's thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/15586.

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Conventional management approaches, focused primarily on stock status and top-down driven regulatory measures, such as are employed in many commercial fisheries across the globe, have proven to be inadequate in managing small-scale fisheries and have contributed to marginalisation of this sector. In South Africa, small-scale fisheries have been increasingly recognised since the abolishment of Apartheid and the advent of democracy in 1994. Nevertheless, the management approaches implemented have been largely top-down, natural science-driven and single-species approach. South Africa's fishery sector is currently going through a historic moment where all small-scale fishers are awaiting implementation of a new Small-Scale Fisheries Policy that will see it endorsing the holistic, multi-species and people-centred approach and the recognition of local and indigenous knowledge of fisheries and addressing the complex socio-economic needs of the fishers. However, in order to implement this policy using a co-management and EAF approach, Government and fishing communities will need to set up the required information-gathering and monitoring tool that would be in line with the principles and objectives of the South African Small-Scale Fisheries Policy as careful assessment of social and economic outcomes of fisheries policies is required to support and sustain livelihoods of these fishers. A proper information management system (IMS) would further ensure that the new approaches to small-scale fisheries management are practical and effective in managing this sector. In investigating the small-scale fisheries information management system, the researcher conceptualised and designed an IMS and further conducted case studies by analysing and work-shopping results of analysed catch data recorded by an independent service provider to Doringbaai small-scale fishers, and analysed catch data of East Coast Rock Lobster in the Eastern Cape of South Africa. Based on the results of the conceptualised and designed IMS and that of the analysed catch data, it is clear that there is a need for the IMS to be converted into a web-based system and further accommodate more indicators that would assist in equipping fishers and fisheries authorities with relevant decision-making. It is also clear that there is a need for an urgent overhaul in how catch data is gathered and packaged as there were numerous errors in the data that could affect how small-scale fisheries should be managed. One of the interventions urgently needed is implementation of an electronic data capturing and instant synchronisation of data into the IMS which would present live data through a web interface customised per user type. Such tool would improve the current management measures and further contribute to improving governance of small-scale fisheries when the Small-Scale Fisheries Policy is implemented.
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Books on the topic "Loligo fisheries – South Africa"

1

Sizani, Richard Khaliphile. Selected aspects of the South African fisheries policy. [Cape Town]: Institute of Marine Law, University of Cape Town, 1991.

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Mohamed, Najma. Co-governing natural resources in southern Africa: Lessons from fisheries co-management, Malawi & conservation co-management, South Africa. [Harare]: Centre for Applied Social Sciences, University of Zimbabwe, 2001.

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C. J. de B. Beyers. The biology, availability, and exploitation of rock lobster Jasus lalandii, off South West Africa/Namibia, 1970-1980. Cape Town: Sea Fisheries Research Institute, 1990.

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(Firm), Synergie. Evaluation study on private initiative in artisanal fisheries projects in Africa south of the Sahara: Final report, August 1992. Antwerp: Synergie, 1992.

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Regional Workshop on Networking for Improved Access to Fisheries and Aquaculture Information in Africa (2003 Grahamstown, South Africa). Report of and papers presented at the Regional Workshop on Networking for Improved Access to Fisheries and Aquaculture Information in Africa: Grahamstown, South Africa, 3-7 November 2003 = Rapport de et documents présentés à l'atelier régional sur le renforcement du réseau pour l'accès à l'information sur la pêche et l'aquaculture en Afrique : Grahamstown, Afrique du Sud, 3-7 novembre 2003. Rome, Italy: Food and Agriculture Organization of the United Nations, 2003.

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Technical Consultation on Legal Frameworks and Economic Policy Instruments for Sustainable Commercial Aquaculture in Africa South of the Sahara (2001 Arusha, United Republic of Tanzania). Report of the technical consultation on legal frameworks and economic policy instruments for sustainable commercial aquaculture in Africa south of the Sahara =: Rapport de la consultation technique sur les cadres juridiques et les instruments de politique économique à adopter pour promouvoir une aquaculture comerciale durable en afrique subsaharienne : Arusha, United Republic of Tanzania, 4-7 December 2001. Rome: Food and Agriculture Organization of the United Nations, 2002.

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(Editor), Maria Hauck, and Merle Sowman (Editor), eds. Waves of Change: Coastal and Fisheries Co-Management in South Africa. Juta Academic, 2004.

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Book chapters on the topic "Loligo fisheries – South Africa"

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Augustyn, Johann, Andrew Cockcroft, Sven Kerwath, Stephen Lamberth, Jean Githaiga-Mwicigi, Grant Pitcher, Michael Roberts, Carl van der Lingen, and Lutz Auerswald. "South Africa." In Climate Change Impacts on Fisheries and Aquaculture, 479–522. Chichester, UK: John Wiley & Sons, Ltd, 2017. http://dx.doi.org/10.1002/9781119154051.ch15.

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Cochrane, Kevern L., and Andrew I. L. Payne. "People, purses and power: developing fisheries policy for the new South Africa." In Reinventing Fisheries Management, 73–99. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-4433-9_5.

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Isaacs, Moenieba. "Creating Action Space: Small-Scale Fisheries Policy Reform in South Africa." In Poverty Mosaics: Realities and Prospects in Small-Scale Fisheries, 359–82. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-1582-0_16.

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Glazewski, Jan. "Challenges Concerning ‘Development’: A Case-Study on Subsistence and Small-Scale Fisheries in South Africa." In Kobe University Monograph Series in Social Science Research, 191–207. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-9423-2_11.

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Sunde, Jackie. "Expressions of Tenure in South Africa in the Context of the Small-Scale Fisheries Guidelines." In MARE Publication Series, 139–63. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-55074-9_8.

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Næsje, Tor F., Amber-Robyn Childs, Paul D. Cowley, Warren M. Potts, Eva B. Thorstad, and Finn Økland. "Movements of undersized spotted grunter (Pomadasys commersonnii) in the Great Fish Estuary, South Africa: implications for fisheries management." In Developments in Fish Telemetry, 25–34. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-6237-7_4.

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Isaacs, Moenieba. "The Governability of Small-Scale Fisheries Food System in South Africa – The Case of Snoek and West Coast Rock Lobster." In MARE Publication Series, 245–62. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-17034-3_13.

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Van Sittert, Lance. "Leviathan Bound: Fisheries Reform in South Africa, 1994-2001." In Geography and Economy in South Africa and its Neighbours, 45–62. Routledge, 2017. http://dx.doi.org/10.4324/9781315254463-3.

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Atkinson, L. J., A. Jarre, L. J. Shannon, and J. G. Field. "Evidence for Shifts in Demersal Fish Populations on the West Coast of South Africa: 1986 to 2009." In Global Progress in Ecosystem-Based Fisheries Management, 45–64. Alaska Sea Grant, University of Alaska Fairbanks, 2012. http://dx.doi.org/10.4027/gpebfm.2012.03.

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van Sittert, Lance. "The South African Fisheries: A Preliminary Survey of Historical Sources." In The Exploited Seas, 167–80. Liverpool University Press, 2001. http://dx.doi.org/10.5949/liverpool/9780973007312.003.0008.

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Lance van Sittert explores the historical records concerning the exploitation of marine resources along the West Coast of Africa, using them to provide evidence of the commerical importance of the West Coast over the East or South. The date demonstrates a boom-bust cycle along the West Coast, pertaining to whales, snoek, guano, rock lobster, hake, and pilchard.
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Conference papers on the topic "Loligo fisheries – South Africa"

1

Toral-Granda, M. V., C. L. Moloney, J. M. Harris, and B. Q. Mann. "Ecosystem Impacts of the KwaZulu-Natal Reef Fishery, South Africa: An Exploratory Model." In Ecosystem Approaches for Fisheries Management. Alaska Sea Grant, University of Alaska Fairbanks, 1999. http://dx.doi.org/10.4027/eafm.1999.19.

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