Assessment of the African river prawn Macrobrachium vollenhovenii (Herklots, 1857) in some lentic and lotic enviroments in Nigeria

Bello-Olusoji, Oluayo A.

doi:10.1111/j.1365-2028.1997.046-89046.x

Cited by 10 publications

(6 citation statements)

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“…Gabche & Hockey (1995) reported its growth and mortality in Cameroon, while Bello-Olusoji & Somers (1997) studied its distribution in Western Nigeria. Etim & Sankare (1998) studied the population dynamics of the species in Fahe River, Côte d'Ivoire.…”

Section: Macrobrachium Vollenhoveniimentioning

confidence: 99%

Population dynamics of the Giant African River prawn Macrobrachium vollenhovenii Herklots 1857 (Crustacea, Palaemonidae) in the Cross River Estuary, Nigeria

Nwosu¹,

Wolfi²

2009

West African Journal of Applied Ecology

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Growth, mortality, recruitment, yield-per-recruit and present rate of exploitation of the African river prawn Macrobrachium vollenhovenii were studied in the Cross River Estuary, Nigeria. The research was based on length-frequency data collected between January 1997 and June 1998, and FAO-ICLARM Software (FiSAT) routine runs. Growth parameters obtained from the seasonalized von Bertalanffy growth function were L∞ 213.63 and 198.99 mm, K = 1.24/year and 1.24/year; C = 0.95 and 0.95; WP = 0.6 and 0.45, for M. vollenovenii males and females, respectively. Using the seasonalized length-converted catch curves, the instantaneous rate of total mortality Z was estimated as 3.93/year and 6.85/year for males and females. Natural mortality M, fishing mortality F, and exploitation rate E of both sexes were 2.21/year and 2.27/year, 1.72/year and 4.58/year, and 0.44 and 0.67, respectively. The length at first capture L c estimated from the probability of capture routine was 44.25 mm and 73.41 mm for males and females. One recruitment peak was observed for males, and two of unequal strength for females. Length-weight relationship gave 'b' values of 3.483 and 3.329 for males and females, respectively. The relative yield-per-recruit analysis predicted maximum exploitation rates (E max ) of 0.42 and 0.47 as against current exploitation rates of 0.44 and 0.67 for males and females and suggest that only female M. vollenhovenii are being over-exploited. Hence, it is proposed that fishing on females during the reproductive season is reduced, and that the return of egg-bearing females into the waters is enforced.

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Section: Macrobrachium Vollenhoveniimentioning

confidence: 99%

Population dynamics of the Giant African River prawn Macrobrachium vollenhovenii Herklots 1857 (Crustacea, Palaemonidae) in the Cross River Estuary, Nigeria

Nwosu¹,

Wolfi²

2009

West African Journal of Applied Ecology

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“…After transferring the larvae to tank groups B (B4 and B5) and C (C4 to C7), the number of larvae obtained by hatching was estimated as larval density (LD) per liter as (Makombu et al, 2014) [10] :…”

Section: Breeding Larvae Of M Vollenhoveniimentioning

confidence: 99%

“…The few studies carried out on this species have focused mainly on its biology and ecology (Savaya et al, 2014;Konan et al, 2010;Bello-Olusoji, 1997;Anetekhai, 1986;Marioghae, 1982) [8][9][10][11][12] . Specific breeding techniques for M. vollenhovenii are poorly studied around the world (Niass et al, 2015;Makombu et al, 2014;Willführ-Nast et al, 1993;Anetekhai et al, 1987) [13][14][15][16] .…”

Section: Introductionmentioning

confidence: 99%

Breeding and larval rearing in hatchery of Macrobrachium vollenhovenii (Herklots, 1857) in a perspective of biological control against human Schistosomiasis in tropical area

Ndao¹,

Kantoussan

Seck

et al. 2019

JMBA

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As part of an effort to use biological control against human schistosomiasis, post-larval production of the prawn Macrobrachium vollenhovenii was carried out in a hatchery. This species is a freshwater native and is fond of mollusks, intermediate hosts of schistosomes that transmit human diseases in the wild. The larval production of this species occurred in six (06) tanks -two 200 L and four 600 L. The management of brood stock took place in fresh water, with a ratio of one male to four females. Each fertilized female produced thousands of eggs attached to the abdomen until hatching about two weeks later. The larvae resulting from this reproduction were raised to the post-larval stage in brackish water at a salinity of 15 ppt. The larvae must undergo a molt between each stage. We identified 15 morphological stages between stage 1 and the post-larval stage. The duration from stage 1 until onset of the first post-larval stage in the six (06) tanks was on average 54 days after hatching. The success of larvi culture is defined by the rate of metamorphosis of the larvae into post-larvae, which, in our case, varied between 0.17% and 3.08%, depending on the production tanks, with an average of 2.8%. These results show that the production of M. vollenhovenii in hatchery is possible, presenting a possibility for aquaculture production of this species as well as for biological control against schistosomiasis in a tropical area.

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“…As a consequence, this species is abundant in rivers that are directly or remotely connected to the ocean. Surprisingly, studies on the biology and ecology of Macrobrachium in West Africa are mainly focused on coastal and estuarine populations (Bello-Olusoji & Somers 1997;Nwosu & Wolfi 2006;Nwosu et al 2007;Falaye & Abohweyere 2008).…”

Section: Introductionmentioning

confidence: 97%

Artisanal Fishery of the Exploited Population of Macrobrachium vollenhovenii Herklot 1857 (Crustacea; Palaemonidae) in the Asu River, Southeast Nigeria

Okogwu

Ajuogu

Nwani

2010

Acta Zoologica Lituanica

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River prawn in Nigeria sustains viable commercial fisheries, which, however, are poorly studied. In this study we evaluated the migrant prawn fishery in the Asu River and the relevance of length-frequency data to the estimation of Macrobrachium vollenhovenii population dynamics using the data collected monthly from January 2007 to December 2008. The length-frequency data were analysed using the FAO-ICLARM stock assessment tool. Over 80% of captured prawns were M. vollenhovenii with peak catches attained in July. Growth parameters of L ∞ = 23.65 cm, K = 1.14 year -1 and (t 0 ) = -1.45, were estimated. The estimated longevity of 2.10 years and the growth performance index (Φ') of 2.80 compared favourably with the available information on the species, authenticating reliability of our results. The instantaneous rate of total mortality estimated from the length-converted catch curve was 6.47years -1 . Natural and fishing mortality were 2.14 years -1 and 4.33 years -1 respectively, which yielded the exploitation rate of 0.67. This exploitation rate is higher than values from other parts of Africa and indicates that the migrant stock is over exploited. It is even more worrisome as indicators show that exploitation rate is going to increase in the foreseeable future. We therefore cautioned that if an effective management policy is not implemented soon, the stock may be grossly depleted and natural recruitment may be impaired, which may also affect prawn fishery in the Cross River estuary.

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Assessment of the African river prawn Macrobrachium vollenhovenii (Herklots, 1857) in some lentic and lotic enviroments in Nigeria

Cited by 10 publications

References 0 publications

Population dynamics of the Giant African River prawn <i>Macrobrachium vollenhovenii</i> Herklots 1857 (Crustacea, Palaemonidae) in the Cross River Estuary, Nigeria

Population dynamics of the Giant African River prawn <i>Macrobrachium vollenhovenii</i> Herklots 1857 (Crustacea, Palaemonidae) in the Cross River Estuary, Nigeria

Breeding and larval rearing in hatchery of Macrobrachium vollenhovenii (Herklots, 1857) in a perspective of biological control against human Schistosomiasis in tropical area

Artisanal Fishery of the Exploited Population of Macrobrachium vollenhovenii Herklot 1857 (Crustacea; Palaemonidae) in the Asu River, Southeast Nigeria

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