Fisheries Publications by Prof Hecht

Hecht, T. 2006. Regional review of aquaculture development. 4. Sub-Saharan Africa – 2005. FAO Fisheries Circular. No. 1017/4. Rome, FAO. 2006. 96 pp.

Chimatiro, S.K., Hecht, T & Scholz, U. 1998 (Oral). Ecological characteristics of the Lower Shire Floodplain in Malawi, and its implications for fisheries management. International Conference, African Fish and Fisheries: Diversity and Utilisation, Grahamstown. September 1998.

GRIFFITHS, M.H. & HECHT, T. 1990. Western boundary current migrations: Their ecological significance and implications for fisheries management. (7th National Oceanographic Symposium, San Lemeer, June 1990).

Grandcourt, E. M., Hecht, T., Booth, A. J., and Robinson, J. 2008. Retrospective stock assessment of the Emperor red snapper (Lutjanus sebae) on the Seychelles Bank between 1977 and 2006. – ICES Journal of Marine Science, 65: 889–898.

Hecht, T. and Jones, C.L.W. 2009. Use of wild fish and other aquatic organisms as feed in aquaculture – a review of practices and implications in Africa and the Near East.

Potts, W., Hecht, T. & Andrew, T.G. 2008. Does reservoir trophic status influence the feeding and growth of the sharptooth catfish, Clarias gariepinus (Teleostei: Clariidae)? African Journal of Aquatic Science, 33 (2): 149-156.

Weyl, O.L.F & Hecht, T. 1998. The biology of Tilapia rendalli and Orechromis mossambicus in a subtropical lake in Mozambique. S. Afr. J. Zool. 33: 178 – 188.

Kriwet, J. and Hecht, T. 2008. A review of early gadiform evolution and diversification: first record of a rattail fish skull (Gadiformes, Macrouridae) from the Eocene of Antarctica, with otoliths preserved in situ. Naturwissenschaften 95:899–907.

Gray,M., Hecht, T. & Sauer, W.H.H. 2007. On the feasibility of a directed trap-fishery for panga Pterogymnus laniarius (Sparidae) in South Africa. African Journal of Marine Science, 29(3): 465–472

Thompson, E., Strydom, N, Hecht, T. 2007. larval development of Dagetichtys marginatus (Soleidae) obtained from hormone –induced spawning under atrtificial rearing conditions. Scientia Marina 71(3): 421-428.

Lockyear, J., Hecht, T., Kaiser, H., Teske,P.R. 2006. The distribution and abundance of the endangered Knysna seahorse Hippocampus capensis (Pisces: Syngnathidae) in South African estuaries. African Journal of Aquatic Science, 31(2): 275–283

Potts, W., Booth, A., Hecht, T., Andrew, T. 2006. The life history and fishery potential of Labeo umbratus (Teleostei:Cyprinidae) in five small South African reservoirs. Afr. J. Aquat. Sci. 31(2), 285-295.

Potts, W., Booth, A., Hecht, T., Andrew, T. 2006. Predictor variables for moggel (Labeo umbratus) biomass and production in small South African reservoirs. Afr. J. Aquat. Sci. 31: 107-118.

Kruitwagen, G., Hecht, T., Pratap, H.B. & Wendelaar Bonga, S.H. 2006. Changes in morphology and growth of the mudskipper (Periophthalmus argentilineatus) associated with coastal pollution. Marine Biology 149(2): 201-211.

Potts, W., Booth, A., Hecht, T., Andrew, T. 2005. Reproductive biology of a riverine cyprinid, Labeo umbratus (Teleostei: Cyprinidae), in small African reservoirs. Afr. J. Aquat. Sci. 30: 157-165

Kamukuru, A., Hecht, T & Mgaya, Y.D. 2005. Effects of exploitation on age, growth and mortality of the blackspot snapper, Lutjanus fulviflamma, at Mafia Island, Tanzania. Fisheries Management and Ecology, 12: 45-55.

Davis, J. Churchill, G. Hecht, T. & Sorgeloos, P. 2004. Spawning characteristics of the South African mudcrab Scylla serrata (Forskal) in captivity. J. World Aquaclt. Soc. 35: 121–132.

Hecht, T., Irish, A. and J. Sales 2003 — Effect of protein level and varying protein-lipid concentrations on growth characteristics of juvenile spotted grunter Pomadasys commersonnii (Haemulidae). S. Afr. J. mar. Sci. 25: 283-288.

Davis, J.A., Van Blerk, L.L., Kirby, R. & Hecht, T. 2003. Genetic variation in mud crab Scylla serrata (Forskal, 1775) (Crustacea : Portunidae) in South African estuaries. Afr. Zool. 38: 383 – 350.

Mann, BQ, McDonald, A.M, Sauer, W.H.H. & Hecht, T. 2003. Evaluation of participation in and management of the Transkei shore line fishery. Afr. J. Mar. Sci. 25: 79 – 98.

Hecht T. 2000. Considerations on African aquaculture. World Aquaculture Vol 31(1): 12 – 19.

Maartens, L., Booth, A.J. and Hecht, T. 1999. The growth of monkfish Lophius vomerinus in Namibian, waters, with a comparison of otolith and ilicia methods of ageing. Fisheries. Res. 44: 139 – 148.

Kaunda, E and Hecht, T. 1999. Natural diet of Dinotopterus nyassensis (Greenwood 1961) from Lake Malawi. Malawi J. Science 5: 33 – 39.

Hecht, T. and Heasman, K. 1999. The culture of Mytilus galloprovincialis in South Africa and the carrying capacity of Saldanha Bay. World Aquaculture. 30 (4): 50 – 56.

Booth, A.J., Brower, S.L. and Hecht, T. 1999. Considerations on the feasibility of a directed fishery for panga, Pterogymnus laniarius (Pisces:Sparidae). S. Afr. J. Mar. Sci. 21: 77 – 88

Weyl, O.L.F & Hecht, T. 1999. A successful population of largemouth bass, Micropterus salmoides in a subtropical lake in Mozambique. Env. Biol. Fish. 54: 53 – 66

Booth, A.J. & Hecht, T. 1998. Changes in the Eastern Cape demersal inshore trawl fishery between 1967 and 1995. S. Afr. J. Mar. Science. 19: 341 – 353.

Heasman, K. Pitcher, G., Mc McQuaid, C. & Hecht, T. 1998. Shellfish mariculture in the Benguela system: Raft culture of Mytilus galloprovincialis and the effect of rope spacing, on food extraction, growth rate, production and condition of mussels. J. Shellfish Res. 17: 33 – 39.

KAISER, H., WEYL, O. & HECHT, T. 1996. “Breath-holding” in Oreochromis mossambicus. S. Afr. J. Sience 92: 152 – 154.

HECHT, T. 1995. Situacion actual de la acuicultura en Sudafrica. Aqua Noticias International 27: 55 – 59.

CAMBRAY, J.A. & HECHT, T. 1995. Comparison of the growth of two closely related redfin minnows, Pseudobarbus afer and P.asper in the Gamtoos river system, South Africa. J. Afr. Zool. 109: 349 – 376.

GRIFFITHS, M.H. & HECHT, T. 1995. On the life history of Atractoscion aequidens, a migratory sciaenid off the east coast of southern Africa. J. Fish Biol. 47: 962 – 985.

SMALE, M.J., WATSON, G., HECHT, T. 1995. Otolith Atlas of Southern African Marine Fishes. Ichthyol. Monogr. JLB Smith Inst. Ichthyol. No. 1. xiv, 253 p, 149 plates.

DEACON, N. & HECHT, T. 1995. Observations on the thermoregulatory behaviour of spotted grunter Pomadasys commersonnii juveniles. J. Appl. Ichthyol. 11: 100-110.

KAISER, H., HECHT, T. & WEYL, O. 1995. The effect of density on the behaviour of Clarias gariepinus larvae. J. Appl. Ichthyol. 11: 25-36.

ANDREW, T.G., HECHT, T. HEEMSTRA, P.C. & LUTJEHARMS, J.R.E. 1995. The fishes of the Tristan da Cunha archipelago and Gough Island. Ichthyol. Bull. J.L.B. Smith Inst. Ichthyol. 66: 48p.

SCHOONBEE, H.J., HECHT, T., SAAYMAN, J.E., POLLING, L. 1995. Fish population assessment in a temperate lowveld impoundment of the Transvaal, South Africa. Water SA 21: 147 – 152.

KNAUER, J., HECHT, T., BRITZ, P. J. 1995. A note on the feeding behaviour and growth of juvenile South African abalone, Haliotis midae, fed on an artificial diet. S. Afr. J. Sci. 91: 91-93.

TILNEY, R.L. & HECHT, T. 1993. Early ontogeny of Galeich¬thys feliceps Valenciennes from the south east coast of South Africa. J. Fish Biol. 43: 183 – 212.

ANDREW, T. & HECHT, T. 1992. Feeding biology of Acanthola¬tris monodactylus (Pisces) at Tristan da Cunha and Gough Island, South Atlantic. S. Afr. J. Antarct. Res. 22: 41 – 49.

HECHT, T. & BRITZ, P.J. 1992. The current status, future pros¬pects and environmental implications of mariculture in South Africa. S. Afr. J. Science 88: 335 342.

HECHT, T. & VAN DER LINGEN, C.D. 1992. Turbidity induced changes in feeding strategies of fish in estuaries. S. Afr. J. Zool. 27(3): 95 107.

THORPE, P.S. & HECHT, T. 1992. Feeding frequency, daily ration and feed utilisation of an optimal dry diet for early juvenile Oreochromis mossambicus. Water SA 18: 53 56.

COOPER, J., CRAFFORD, J.E. & HECHT, T. 1992. Introduction and extinction of brown trout (Salmo trutta L.) in an impoverished subantarctic stream. Antarct. Science 4: 9 14.

HECHT, T. & McEWAN, A.G. 1992. Changes in gross protein and lipid requirements of rainbow trout, Oncorhynchus mykiss (Walbaum), at elevated temperatures. Aquacult. Fish. Managmt. 23: 133 148.

DIXON, M.G., HECHT, T. & BRANDT, C.R. 1991. Identification and treatment of a Clostridium and Vibrio infection in South African abalone, Haliotis midae L. J. Fish Diseases 14: 693 695.

HECHT, T, LUBLINKHOF,W. & KENMUIR, D. 1991. Induced spawning of the vundu Heterobranchus longifilis and embryo survival rates of pure and reciprocal clariid crosses. S. Afr. J. Wildl. Res. 21(4): 123 125.

NAISH, K A, HECHT, T. AND PAYNE, A.I.L. 1991. Growth of South African horse mackerel Trachurus trachurus capensis off South Africa. S. Afr. J. Mar. Science 10: 29 35.

HECHT, T. 1991. Otoliths: an introduction to their morphology and use in the identification of Southern Ocean fishes. pp. 64 69 (plus 112 descriptions and illustrations) In: Fishes of the Southern Ocean. Gon, O. and Heemstra, P.C. (Eds.). JLB Smith Institute, Grahamstown, 462 pp.

HECHT, T. 1990. On the life history of Cape horse mackerel, Trachurus trachurus capensis off the south east coast of South Africa. S. Afr. J. Mar. Science 9: 317 326.

TILNEY,R.L. and HECHT,T. 1990. The food and feeding of two co-occurring marine catfish, Galeichthys feliceps and G. ater (osteichthyes : Ariidae) along the south east coast of South Africa. J. Zool. Lond. 221: 171 193.

MAYEKISO, M. & HECHT, T. 1990. The feeding and reproductive biology of a South African anabantid fish, Sandelia bainsii. Rev. d’hydrobiol. Tropicale 23: (3): 219 230.

HECHT,T and TILNEY,R.L. 1989. The Port Alfred fishery: A descrip¬tion and preliminary evaluation of a commercial linefishery on the South African east coast. S. Afr. J. Mar. Sci. 8: 103 117.

BRITZ, P.J. and HECHT,T. 1989. The effect of salinity on the growth and survival of African sharptooth catfish, Clarias garie¬pinus larvae. J. Appl. Ichthyol. 5: 194 202.

VAN DAMME, P.,APPELBAUM,S and HECHT,T. 1989. Sibling cannibalism in Koi carp, Cyprinus carpio L. larvae and juveniles. J. Fish Biol. 34 (6): 855 864.

LAURENSON, L.J.B., HOCUTT, C.H. and HECHT,T. 1989. An evaluation of the success of invasive fish species of the Great Fish River. J. Appl. Ichthyol. 5 (1): 28 34.

UYS, W. and HECHT, T. 1988. Production and grow out. In: Hecht, T., Uys, W. and Britz, P.J. (Eds). A guide to the culture of the sharptooth catfish, Clarias gariepinus in southern Africa. South African National Scientific Programmes Report. (153): 62 72.

BRITZ, P.J. and HECHT, T. 1988. Artificial propagation and fry production. In: Hecht, T., Uys, W. and Britz, P.J. (Eds). A guide to the culture of the sharptooth catfish, Clarias gariepinus in southern Africa. South African National Scientific Pro¬grammes Report. (153): 36 46.

HECHT,T. 1988. An overview of the development of clariid catfish culture, with particular reference to southern Africa. In: Hecht, T., Uys, W. and Britz, P.J. (Eds) . A guide to the culture of the sharptooth catfish, Clarias gariepinus in southern Africa. South African National Scientific Programmes Report. (153): 12 26.

MAYEKISO, M. and HECHT, T. 1988. Age and growth of Sandelia bainsii (Pisces: Anabantidae). S. Afr. J. Zool. 23 (4): 295 300.

MAYEKISO, M and HECHT, T. 1988. Conservation status of the anabantid fish Sandelia bainsii in the Tyume River, South Africa. S. Afr. J. Wildl. Res. 18(3): 101 108.

HECHT, T. 1988. Aquaculture. de Jager Haum, Pretoria, 55 p.

DE MERONA, B., HECHT,T. and MOREAU,J. 1988. Growth of African freshwater fishes. In: The biology and ecology of African freshwater fishes : A synthesis. C. Leveque, M. N. Bruton and G. Ssentogo (Eds). ORSTOM, Paris. pp. 191 220.

HECHT,T. and APPELBAUM,S. 1988. Observations on intraspecific aggression and coeval sibling cannibalism by larval and juvenile Clarias gariepinus (Clariidae : Pisces) under controlled condi-tions. J. Zool. Lond. 214 (1): 21 44.

HECHT, T. 1987. A guide to the otoliths of southern ocean fishes. S. Afr. J. Ant. Res 17(1): 1 89.

UYS, W., HECHT, T. and WALTERS, M. 1987. Changes in digestive enzyme activities of Clarias gariepinus (Pisces : Clariidae) after feeding. Aquaculture. 63: 243 250.

UYS, W. and HECHT,T. 1987. Assays on the digestive enzymes of sharptooth catfish, Clarias gariepinus (Pisces : Clariidae). Aquaculture. 63: 301 313.

HECHT,T. and APPELBAUM,S. 1987. Notes on the growth of Israeli sharptooth catfish (Clarias gariepinus) during the primary nursing phase. Aquaculture. 63: 195 204.

BRITZ,P. and HECHT,T. 1987. Temperature preferences and optimum temperature for growth of African sharptooth catfish (Clarias gariepinus) larvae and post larvae. Aquaculture.

GRIFFITHS, M.H. and HECHT,T. 1986. Age and growth of the monkfish from the Agulhas Bank. S. Afr. J. Mar. Sci. 4: 51 60.

HECHT, T. and COOPER,J. 1986. Length/mass relationships, energetic content and the otoliths of Antarctic cod Paranotothenia magellanica (Nototheniidae : Pisces) at sub Antarctic Marion Island.S. Afr. J. Zool 21: 294 296.

HEEMSTRA, P.C. and HECHT,T. 1986. Dinopercidae, a new family for the percoid marine fish Genera Dinoperca Boulenger and Centrarchops Fowler (Pisces: Perciformes). Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology (51): 1 20.

LA COCK, G., HECHT,T. and KLAGES,N. 1984. The winter diet of Gentoo penguins (Pygoscelis papua) at Marion Island. Ostrich. 55 : 188 191.

McEWAN, A. and HECHT,T. 1984. Age and growth of the longfin eel Anguilla mossambica (Pisces : Anguillidae). S. Afr. J. Zool. 19 : 280 285.

HECHT, T. and ZWAY,P. 1984. On the stunted mozambique tilapia Oreochromis mossambicus (Pisces : Cichlidae) of the Matiovila hot spring, Kruger National Park. Koedoe 27: 25 38.

DUFFY, D.C. and HECHT, T. 1984. Ship followers and seabird counts: Observer’s distance from stern may affect counts. Cormorant 12: 44 48.

COOPER, J., HECHT,T., ENTICOTT,J.W. and KLAGES,N. 1984. Prey from three chinstrap penguins (Pygoscelis antarctica) at Bouvet Island, December 1982. S. A. J. Antarctic Res.14:32 33.

HECHT, T., POLLING,L. and MOKGALONG,N.M. 1983. The fishes of the Limpopo and Olifants river tributaries (Limpopo Drainage Basin, South Africa). Part IV. Annotated checklist of the fishes of the Nwanedi tributary of the Limpopo River. Univ. of the North Series A 29: 1 9.

HECHT, T. and SCHOLTZ,A.T.J. 1983. The fishes of the Limpopo and Olifants river tributaries (Limpopo Drainage Basin, South Africa). Part III. Annotated checklist of the fishes of the Steelpoort tributary of the Olifants River. Univ. of the North Series A 28 : 1 11.

HECHT, T. 1982. On the enigmatic otoliths and the systematic position of the teleostean genera Adioryx, Holocentrus and Flammeo (Holocentridae : Beryciformes). Israel J. Zoology 31 (1 2) : 39 46.

HECHT, T., SAAYMAN,J.E. and POLLING,L. 1982. Further observations on the induced spawning of the sharptooth catfish, Clarias gariepinus (Clariidae : Pisces). Water S.A. 8 (2) : 101 107.

HECHT, T. 1982. New distributional record of Glossogobius giuris (Pisces : Gobiidae) in the Limpopo River. S. Afr. J. Sci. 78 : 295.

HECHT, T. 1982. Intensive rearing of sharptooth catfish larvae (Clarias gariepinus, Clariidae : Pisces). S. Afr. J. Wildl. Res. 12 (3) : 101 105.

HECHT, T. and VILJOEN, J.H. 1982. The suitability of various dry feeds for the commercial rearing of common carp larvae Cyprinus carpio. Water S.A. 8 (1) : 58 65.

HECHT, T. and APPELBAUM, S. 1982. The morphology and taxonomic significance of the otoliths of some bathypelagic Anguilloidei and Saccopharyngoidei (Pisces : Anguilliformes) from the Sargasso Sea. Helgoländer Meeresunters. 35 : 301 308.

HECHT, T. and HECHT, A. 1981. A descriptive systematic study of the otoliths of the Neopterygean marine fishes of South Africa. Part IV. Siluriformes and Myctophiformes. Trans. roy. Soc. S. Afr. 44 : 401 440.

HECHT, T., POLLING, L. and SAAYMAN, J.E. 1981. First record of the snake catfish Clarias theodorae (Weber, 1898) (Clariidae : Pisces) from the Transvaal, South Africa. J. Limnol. Soc. sthn. Afr. 7 (2) : 57 58.

HECHT, T. and MASHEGO,S.N. 1981. The fishes of the Limpopo and Olifants river tributaries (Limpopo drainage basin, South Africa). Part II. Annotated checklist of the fishes of the Mohlapitse tributary of the Olifants River. Univ. of the North Series A 26 : 1 10.

HECHT, T. and SAAYMAN, J.E. 1981. The fishes of the Limpopo and Olifants river tributaries (Limpopo drainage basin, South Africa). Part I. Introduction. Univ. of the North series A 25 : 1 5.

SCHOONBEE, H.J., HECHT,T., POLLING,L. and SAAYMAN,J.E. 1980. Induced spawning of and hatchery techniques with the sharptooth catfish Clarias gariepinus (Clariidae: Pisces). S. Afr. J. Sci. 76 : 364 368.

HECHT, T. 1980. Age, growth and reproduction and mortality of the butter catfish, Eutropius depressirostris (Schilbeidae : Pisces) in the Luphephe/Nwanedzi Impoundment, Venda (Southern Africa). J. Limnol. Soc. sthn. Afr. 6 : 39 45.

HECHT, T. 1980. A comparison of the otolith and scale methods of ageing and the growth of Sarotherodon mossambicus (Pisces : Cichlidae) in a Venda impoundment (Southern Africa). S. Afr. J. Zool. 15 : 222 228.

HECHT, T. 1979. The value of otoliths in fresh water fisheries biology and taxonomy. Univ. of the North Series A 19 : 1 17.

HECHT, T. and HECHT, A. 1979. A descriptive systematic study of the otoliths of the Neopterygean marine fishes of South Africa. Part III. Elopiformes, Gonorhynchiformes, Clupeiformes and Salmoniformes. Trans. roy. Soc. S. Afr. 44 : 73 95.

HECHT, T. and APPELBAUM, S. 1978. Otolith length/fish length relationship of leptocephali, elvers and reared subadult eels (Anguilla anguilla). Env. Biol. Fish. 3 : 245 247.

HECHT, T. and HECHT, A. 1978. A descriptive systematic study of the otoliths of the Neopterygean fishes of South Africa. Part II. The delimination of teleost orders, some systematic notes and a provisional new phyletic order sequence. Trans. roy. Soc. S. Afr. 43: 199 218.

HECHT, T. 1978. A descriptive systematic study of the otoliths of the Neopterygean marine fishes of South Africa. Part I. Introduction. Trans. roy. Soc. S. Afr. 43: 191 197.

POST, A. and HECHT,T. 1977. Results of the research cruises of the FRV Walther Herwig to South America XLIX. The otoliths of Diretmus species. Mitt. Hamburg Zool. Mus. Inst. 74: 165 170.

HECHT, T. 1977. The trawl fishery of the eastern Cape coast. S. A. Shipp. News Fish. Ind. Rev. 32 (5) : 47 51

.

HECHT, T. 1977 A note on photographing otoliths. Zool. Afr. 12 : 497.

HECHT, T. and BAIRD,D. 1977. Contributions to the biology of the panga Pterogymnus laniarius (Pisces : Sparidae) : Age, growth and reproduction. Zool. Afr. 12: 363 372.

HECHT, T. 1977. Contributions to the biology of the gurnard, Trigla capensis (Pisces: Triglidae) : Age, growth and repro¬duction. Zool. Afr. 12 : 373 382.

HECHT, T. 1975. Blood calcium values of Sesarma catenata (Ort.) (Crustacea : Brachyura) during the moulting cycle. S. Afr. J. Sci. 71: 281 – 281.

PUBLISHED BOOKS AND CHAPTERS IN BOOKS

HECHT, T. et.al. 1996. South African Water Quality Guidelines (2nd edition). Vol. 6. Agricultural Water Use: Aquaculture. Dept. of Water Affairs and Forestry, Pretoria. 193p.

HECHT, T. 1991. Otoliths: an introduction to their morphology and use in the identification of Southern Ocean fishes. pp. 64 69 (plus 112 descriptions and illustrations) In: Fishes of the Southern Ocean. Gon, O. and Heemstra, P.C. (Eds.). JLB Smith Institute, Grahamstown, 462 pp.

DE MERONA, B., HECHT, T. & MOREAU, J. 1988. Growth of African freshwater fish. In: Leveque, C., Bruton, M.N. & Ssentongo, G.W., Biology and Ecology of African Freshwater Fishes. pp. 191 – 221. ORSTOM, Paris.

HECHT, T., UYS, W. and BRITZ, P.J. (EDS). 1988. A guide to the culture of the sharptooth catfish in southern Africa. South African National Scientific Programmes Report. (153): 1 106.

HECHT,T. 1988. An overview of the development of clariid catfish culture, with particular reference to southern Africa. In: Hecht, T., Uys, W. and Britz, P.J. (Eds) . A guide to the culture of the sharptooth catfish, Clarias gariepinus in southern Africa. South African National Scientific Programmes Report. (153): 12 26.

UYS, W. and HECHT, T. 1988. Production and grow out. In: Hecht, T., Uys, W. and Britz, P.J. (Eds). A guide to the culture of the sharptooth catfish, Clarias gariepinus in southern Africa. South African National Scientific Programmes Report. (153): 62 72.

BRITZ, P.J. and HECHT, T. 1988. Artificial propagation and fry production. In: Hecht, T., Uys, W. and Britz, P.J. (Eds). A guide to the culture of the sharptooth catfish, Clarias gariepinus in southern Africa. South African National Scientific Pro¬grammes Report. (153): 36 46.

EDITED CONFERENCE AND WORKSHOP PROCEEDINGS

BOOTH, A.J and HECHT, T. 2000. Utilisation of South Africa’s living marine resources. In: Summary Marine Biodiversity Status Report for South Africa. Durham, B.D. & Pauw, J.C. (eds). Pp. 57 – 67. National Research Foundation, Pretoria.

HECHT, T. et.al. 1996. South African Water Quality Guidelines (2nd edition). Vol. 6. Agricultural Water Use: Aquaculture. Dept. of Water Affairs and Forestry, Pretoria. 193p.

HECHT, T. & SMALE, M.J. (EDS) 1986. Proceedings of a workshop on age determination and growth modelling of South African Marine Linefish. JLB Smith Institute of Ichthyology Invest. Rep. 21: 40 pp.

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CONFERENCE PRESENTATIONS

Hecht, T. 2010. Overview of mariculture activities in South Africa. Presented at the WIOMSA, IFS workshop on “Mariculture in WIO region – Challenges and Prospects”, Zanzibar, 30 Nov to 3 Dec 2009.

Bernatzeder, A.K., Cowley, P.D. and T. Hecht. 2008. Salinity induced physiological responses in dusky kob, (Pisces: Sciaenidae). South African Marine Science Symposium, Cape Town, South Africa.

Donovan, B., Hecht, T and Weyl, O. 2008. Towards greater accuracy in the estimation of time-based nominal effort for a small-scale, boat based linefishery. South African Marine Science Symposium, Cape Town, South Africa.

Southern African Marine Science Symposium July 2002, Swakopmund Namibia

Hecht, T. and Mperdempes, J. 2002. Cage culture of kob, Argyrosomus japonicus. Southern African Marine Science Symposium July, 2002. Swakopmund Namibia

Mather, D, Btitz, P. Sauer, W. Hecht, T. & Oellermann, L.K. 2002. Economic and sectoral study of the South African Fishing Industry. Southern African Marine Science Symposium, Swakopmund, Namibia. 1-5 July 2002.

Chimatiro, S.K., Hecht, T & Scholz, U. 1998 (Oral). Ecological characteristics of the Lower Shire Floodplain in Malawi, and its implications for fisheries management. International Conference, African Fish and Fisheries: Diversity and Utilisation, Grahamstown. September 1998. *,***

Kaunda, E. & Hecht, T. 1998 (Poster). On the feeding biology of Dinotoperus nyassensis in Lake Malawi. International Conference, African Fish and Fisheries: Diversity and Utilisation, Grahamstown. September 1998.*, ***

Scott, L. & Hecht, T. 1998 (Poster). The effect of light wavelength on the growth rate, food conversion ratio and condition of juvenile spotted grunter, Pomadasys commersonnii. International Conference, African Fish and Fisheries: Diversity and Utilisation, Grahamstown. September 1998.*, ***

Nthimo, M. & Hecht, T. 1998 (Poster). The development of a subsistence fishery on Khatse reservoir, Lesotho. International Conference, African Fish and Fisheries: Diversity and Utilisation, Grahamstown. September 1998.*,***

Vine, N.G. & Hecht, T. 1998 (Oral). Aspects of the biology of the doublesash butterfly, Chaetodon marleyi (Chaetontidae). International Conference, African Fish and Fisheries: Diversity and Utilisation, Grahamstown. September 1998.*, ***

GRIFFITHS, M.H. & HECHT, T. 1993 *. Two South African Argyrosomus species: Implications for management. Oceanogr. Res. Inst. Spec. Publ. (2): 19 – 22. (Second National Marine Linefish Symposium, Oceanographic Research Institute, Durban, October 1991)

HECHT, T & BUXTON, C.D. 1993 *. Trends in the Transkei commer¬cial linefishery. Oceanogr. Res. Inst. Spec. Publ. (2): 127 – 133. (Second National Marine Linefish Symposium, Oceanographic Research Institute, Durban, October 1991)

HECHT, T. 1990 *. The status of the East Cape linefishery. In: Marine Recreational Fishing: Resource Usage, management and research. Ed. R.P. van der Elst. S. Afr. Nat. Sci. Prog. Rep. 167: 31 38. (First National Marine Linefish Symosium, East London Museum, October 1989)

HECHT, T. 1990 *. Is reseeding a viable linefish management option? In: Marine Recreational Fishing: Resource Usage, manage¬ment and research. Ed. R.P. van der Elst. S. Afr. Nat. Sci. Prog. Rep. 167: 98 102. (First National Marine Linefish Symosium, East London Museum, October 1989)

HECHT,T. 1990 *. Fundamentals of marine linefish research. In: Marine Recreational Fishing: Resource Usage, management and research. Ed. R.P. van der Elst. S. Afr. Nat. Sci. Prog. Rep. 167: 75 81. (First National Marine Linefish Symosium, East London Museum, October 1989)

TILNEY, R.L. & HECHT, T. 1990. Commercial vs. recreational utilisation of the linefish resource: a case study. (7th National Oceanographic Symposium, San Lemeer, June 1990)

GRIFFITHS, M.H. & HECHT, T. 1990. Western boundary current migrations: Their ecological significance and implications for fisheries management. (7th National Oceanographic Symposium, San Lemeer, June 1990)

HECHT,T. 1988. Characteristics of the Australian freshwater crayfish, Cherax tenuimanus. In:Walmsley, D. (Ed). An overview of marron farming and its potential in South Africa. NRF, CSIR. Ecosyst. Prog. Occ. Rep. (29): 2 10. (CSIR Ecosystems Workshop on marron culture, Stellenbosch, August 1987)

HECHT, T. & SMALE, M.J. 1987. Age and growth of South African marine linefish: recent perspectives. (6th National Oceanographic Symposium, Stellenbosch, July 1987).

HECHT, T. & TILNEY, R.L. 1987. The Port Alfred Linefishery: functional dynamics and management. (6th National Oceanographic Symposium, Stellenbosch, July 1987).

HECHT, T. 1987 *,***. Cannibalism: An alternative life history style. (International Symposium: Alternative life history styles of fishes and other living organisms, Grahamstown, July 1987).

HECHT, T. 1983. An atlas of Antarctic Fish Otoliths. (Fourth International Symposium on Antarctic Biology, Wilderness, September 1983)

HECHT, T. 1982 *. Otoliths; A critical appraisal of their systematic value. (Fourth Congress of European Ichthyologists, Hamburg, September 1982)