Population parameters and exploitation rate of Sarotherodon melanotheron melanotheron rüppell, 1852 (Cichlidae) in Lake Toho, Benin

Paper Details

Research Paper 01/02/2015
Views (238) Download (10)
current_issue_feature_image
publication_file

Population parameters and exploitation rate of Sarotherodon melanotheron melanotheron rüppell, 1852 (Cichlidae) in Lake Toho, Benin

Djiman Lederoun, Antoine Chikou, Emmanuel Vreven, Jos Snoeks, Jacques Moreau, Pierre Vandewalle, Philippe Lalèyè
J. Bio. Env. Sci.6( 2), 259-271, February 2015.
Certificate: JBES 2015 [Generate Certificate]

Abstract

Aspects of the population dynamics of Sarotherodon melanotheron melanotheron, which is a commercially important fish species in Lake Toho, were described based on 1558 specimens collected monthly between January and December 2012 from artisanal captures. The size at first maturity was estimated at 6.9 cm for males and 7.7 cm for females. The asymptotic length obtained by analyzing frequency data with FiSATII software (FAO-ICLARM) has been estimated at 21.5 cm. Further, the von Bertalanffy growth coefficient was 0.58 year-1 and the overall growth performance index was 2.43. The estimates of the total, natural and fishing mortalities were 1.95, 1.37 and 0.58 year -1 respectively. The current exploitation rate was 0.30 and as such, remains below the maximum exploitation rate which was 0.55 according to the selection ogive procedure. However, this value is superior to the exploitation rate at 50% of its unexploited biomass (E0.5 = 0.27). Therefore, a reduction of the current exploitation rate is needed by, at least, 10% to maintain a sufficient biomass. The size at first capture was estimated at 6.7 cm which is lower than the size at first maturity for both sexes, but especially for females. These parameters clearly reflect a current trend of overexploitation.

VIEWS 11

Al-Barwani SM, Arshad A, Nurul Amin SM, Japar SB, Siraj SS, Yap CK. 2007. Population dynamics of the green mussel Perna viridis from the high spat-fall coastal water of Malacca, Peninsular Malaysia. Fisheries Research 84, 147-152.

Alhassan EH, Armah AK. 2011. Population Dynamics of the African River Prawn, Macrobrachium vollenhovenii, in Dawhenya Impoundment. Turkish Journal of Fisheries and Aquatic Sciences 11, 113-119.

Amoussou E. 2010. Variabilité pluviométrique et dynamique hydro-sédimentaire du bassin-versant du complexe fluvio-lagunaire Mono-Ahémé-Couffo (Afrique de l’Ouest). Thèse présentée pour l’obtention du doctorat en Géographie-Spécialité: Géographie physique appliquée, Université de Bourgogne, Paris, 1-315.

Baijot E, Moreau J, Bouda S. 1994. Aspects hydrobiologiques et piscicoles des retenues en zone soudano-sahélienne. CTA, Wageningen, p. 1-250.

Baijot E, Moreau J. 1997. Biology and demographic status of the main fish species in the reservoirs of Burkina Faso. In: Baijot E, Moreau J, Bouda S, Ed. Hydrological Aspects of Fisheries in Small Resersoirs in the Sahel Region, Wageningen, Netherlands: Technical Centre for Agricultural and Rural Cooperation, p. 79-109.

Barry JP, Tegner MJ. 1989. Inferring demographic processes from size-frequency distributions: simple models indicate specific patterns of growth and mortality. Fishery Bulletin 88, 13-19.

Beverton RJH, Holt SJ. 1957. On the dynamics of exploited fish populations. Ministry of Agriculture, Fisheries and Food, Fisheries Investigation, London. Series 2, p. 1-533.

Beverton RJH, Holt SJ. 1966. Manual of methods for fish stock assessment: Part II. Tables of yield function. FAO Fisheries Biology Technical Paper, p. 1-67.

Beverton RJH. 1992. Patterns of reproductive strategy parameters in some marine teleosts fishes. Journal of Fish Biology, 41, 137-160.

Caddy JF, Mahon R. 1995. Reference points for fisheries management. Roma: FAO, p.1- 83.

Dadebo E, Ahlgren G, Ahlgren I. 2003. Aspects of reproductive biology of Labeo horie Heckel (Pisces: Cyprinidae) in Lake Chamo, Ethiopia African Journal of Ecology 41, 31-38.

Diouf PS. 1996. Les peuplements de poissons des milieux estuariens de l’Afrique de l’Ouest: L’exemple de l’estuaire hyperhalin du Sine-Saloum, Université de Montpellier II. Thèses et Documents Microfiches. ORSTOM, Paris, 1-267.

Eckmann R, Gaedke U, Wetzlar HJ. 1988. Effects of climatic and density-dependent factors on year-class strength of Coregonus lavaretus in Lake Constance. Canadian Journal of Fisheries and Aquatic Sciences 45, 1088-1093.

Fagade SO. 1974. Age determination in Tilapia melanotheron (Rüppel) in the Lagos Lagoon, Lagos, Nigeria, with a discussion of the environmental and physiological basis of growth markings in the tropics. In: Bagenal TB, Ed. The ageing of fish, Unwin Brothers Ltd, Old Woking, Surrey, England, p. 71-77.

Fröese R. 2004. Keep it simple: three indicators to deal with overfishing. Fish and Fisheries 5, 86-91.

Gayanilo FC, Jr Sparre P, Pauly D. 1996. FAO-ICLARM stock assessment tools (FiSAT). User’s Guide. FAO computerized information series (Fisheries). FAO, Rome.

Koné T, Teugels GG. 1999. Données sur la reproduction d’un tilapia estuarien (Sarotherodon melanotheron) isolé dans un lac de barrage ouest africain. Aquatic Living Resources 12, 289-293.

Laë R. 1992. Les pêcheries artisanales lagunaires ouest-africaines : échantillonnage et dynamique de la ressource et de l’exploitation. Thèse de Doctorat, Editions ORSTOM, Paris, 1-201.

Lalèyè P, Philippart J-C, Heymans J-C. 1995a. Cycle annuel de l’indice gonadosomatique et de la condition chez deux espèces de Chrysichthys (Siluriformes, Bagridae) au lac Nokoué et à la lagune de Porto-Novo au Bénin. Cybium 19, 131-142.

Lalèyè P, Philippart J-C, Poncin P. 1995b. Biologie de la reproduction de deux espèces de Chrysichthys (Siluriformes, Bagridae) du lac Nokoué et de la lagune de Porto-Novo au Bénin. Journal of African Zoology 109, 213-224.

Le Cren ED. 1951. The length-weight relationship and seasonal cycle in gonad weight and condition in Perch (Perca fluviatilis). Journal of Animal Ecology 20, 201-219.

Legendre M. 1983. Observations préliminaires sur la croissance et le comportement en élevage de Sarotherodon melanotheron (Ruppel, 1852) et de Tilapia guineensis en lagune Ebrié (Côte d’Ivoire). Document Scientifique Centre de Recherche Océanographique, Abidjan 14, 1-36.

Leonardis I, Sinis A. 1998. Reproductive strategy of Aphanius fasciatus Nardo, 1827 (Pisces: Cyprinodontidae) in the Mesolongi and Etolikon lagoons (W. Greece). Fisheries Research 35, 171-181.

Lowe-McConnell RH. 1987. Ecological studies in tropical fish communities, Cambridge University Press, p. 1-382.

Lowe-McConnell RH. 1999. Estudos EcolÓgicos de Communidades de Peixes Tropicais. Edusp, São Paulo.

Moreau J, Cuende FX. 1991. On improving the resolution of the recruitment patterns of fishes. Fishbyte 9, 45-46.

Moreau J, Bambino C, Pauly D. 1986. A comparison of four indices of overall growth performance based on 100 tilapia populations (Fam. Cichlidae). In: Maclean J, Dizon LB, Hosillo LV, Ed. The first Asian fisheries forum, Asian Fisheries Society, Manila, 201-206.

Niyonkuru C. 2007. Etude comparée de l’exploitation et de la démographie des poissons Cichlidés dans les lacs Nokoué et Ahémé au Bénin. Thèse de Doctorat en Gestion de l’Environnement, Université d’Abomey-Calavi, Bénin, 1-199.

Panfili J, Mbow A, Durand JD, Diop K, Diouf K, Thior D, Ndiaye P, Laë R. 2004. Influence on the life-history traits of the West African black-chinned tilapia (Sarotherodon melanotheron): Comparison between the Gambia and the Saloum estuaries. Aquatic Living Resources 17, 65-74.

Plisnier PD. 1990. Ecologie comparée et exploitation rationnelle de deux populations d’Haplochromis spp. (Teleostei, Cichlidae) des lacs Ihema et Muhazi (Rwanda). Thèse de doctorat Sciences Agronomiques, Université Catholique de Louvain, 1-300.

Pauly D. 1976. The biology, fishery and potential for aquaculture of Tilapia melanotheron in a small West African lagoon. Aquaculture 7, 33-49.

Pauly, D. 1978. A preliminary compilation of fish length growth parameters. Berichte des Institut für. Meereskunde an der Christian-Albrechtc Universität Kiel 55, p 1-200.

Pauly, D. 1979. Theory and management of tropical multispecies stocks: a review with emphasis on the Southeast Asian demersal fisheries. ICLARM Sudies Review 1.

Pauly D. 1980. On the interrelationships between natural mortality, growth parameters and mean environmental temperature in 175 fish stocks. Journal du Conseil Inernational pour l’Exploration de la Mer 39, 175-192.

Pauly D. 1983. Length-converted catch curve: a powerful tool for fisheries research in the tropics (Part I). Fishbyte 1, 9-13.

Pauly D. 1984. Length-converted catch curve: a powerful tool for fisheries research in the tropics (Part II). Fishbyte 2, 17-19.

Pauly D, Munro JL. 1984. Once more on the comparison of growth in fish and invertebrates. Fishbyte 2, 21-22.

Pauly D, Soriano ML. 1986. Some practical extensions to Beverton and Holt’s relative yield-per-recruit model. In: Maclean J, Dizon LB, Hosillo LV, ed. The first Asian fisheries forum, Asian Fisheries Society, Manila, 491-496.

Pauly D. 1990. Length-converted catch curves and the seasonal growth of fishes. Fishbyte 8, 33-38.

Pauly D. 1991. Growth performance in fishes: rigorous description of patterns as a basis for understanding causal mechanisms. Aquabyte 4, 3-6.

Pauly D. 1994. Quantitative analysis of published data on the growth, metabolism, food consumption, and related features of the red-bellied piranha, Serrasalmus nattereri (Characidae). Environmental Biology of Fishes 41, 423-437.

Pauly D, Moreau J, Abad N. 1995. Comparison of age-structured and length-converted catch curves of brown trout Salmo trutta in two French rivers. Fisheries Research 22, 197-204.

Pauly D, Moreau J. 1997. Méthodes pour l’évaluation des ressources halieutiques. Cépaduès Editions: Toulouse, 1-281.

Peixer J, Catella AC, Petrere Júnior M. 2007. Yield per recruit of the pacu Piaractus mesopotamicus (Holmberg, 1887) in the pantanal of Mato Grosso do Sul, Brazil. Brazilian Journal of Biology 67, 561-567.

Sparre P, Venema SC. 1997. Introdução á avaliação de mananciais de peixes tropicais. Parte 1-Manual. FAO Documento Técnico sobre as Pescas, 306/1, Ver. 2, p. 1-404.

Sokal R, Rohlf F. 1987. Introduction to Biostatistics. Freeman, New York, USA.

Taylor CC. 1962. Growth equations with metabolic parameters. Journal du Conseil Permanent International pour l’Exploration de la Mer 26, 270-280.

Teugels GG,    Thys van den Audenaerde DFE. 2003. Cichlidae. In: Paugy D, Lévêque C, Teugels GG, ed. Faune des Poissons d’Eaux douces et saumâtres de l’Afrique de l’Ouest, Vol. II. Collection Faune et Flore Tropicales n°40. Tervuren: Musée Royale de l’Afrique Centrale; Paris (France): Muséum National d’Histoire Naturelle; Paris (France): Institut de Recherche pour le Développement, p. 520-600.

Villanueva MCS. 2004. Biodiversité et relations trophiques dans quelques milieux estuariens et lagunaires de l’Afrique de l’Ouest: Adaptations aux ressources  environnementales.  Thèse  de  doctorat Sciences Agronomiques, Institut national Polytechnique de Toulouse, 1-194.

Welcomme RL. 2001.  Inland  Fisheries.  Ecology and  Management.  FAO  and  Fishing  News  Books, Blackwell Science Ltd, Oxford, p. 1-358.