A prelimenary study on the population estimation of the periwinkles Tympanotonus fuscatus (Linnaeus, 1758) and Pachymelania aurita (Muller) at the Rumuolumeni mangrove swamp creek, Niger Delta, Nigeria

Bob-Manuel, Fayeofori G.

doi:10.5251/abjna.2012.3.5.265.270

Cited by 12 publications

(13 citation statements)

References 6 publications

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“…The periwinkle is widely consumed in seafood consommés by coastal populations. Because of its vulnerability to organic pollutants, pesticide runoff, and bio-accumulation of toxins, several studies utilize the periwinkle as a bio-indicator of mangrove ecosystem health (Adebayo-Tayo et al 2006;Bob-Manuel 2012). Another significant edible shellfish of the study area is the Hexaplex sea snail, which clings to the rock outcrops that appear in the lower portion of mangrove estuaries and along the Atlantic coast (Figure 4, left).…”

Section: Resultsmentioning

confidence: 99%

“…Studies in western Africa have demonstrated their potential as bioindicators for pollution assessment while drawing attention to the risks that estuary contamination poses for shellfish populations and human consumption of marine organisms (Adebayo-Tayo et al 2006;Bob-Manuel 2012;Bodin et al 2011). Shellfish can serve as proxy species for monitoring the effects of ocean acidification on biologically important calcium carbonate minerals.…”

Section: The Threatened Mangrove Biomementioning

confidence: 99%

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Shellfish Collection in Senegambian Mangroves: A Female Knowledge System in a Priority Conservation Region

Carney¹

2017

Journal of Ethnobiology

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Shellfish collected in the West African mangrove ecosystem of Senegambia provide a crucial source of dietary protein, but the species harvested for household consumption have received little attention in conservation and socioeconomic research. This study examines the edible mollusks, gastropods, and crustaceans that figure prominently in a mangrove ecosystem that has emerged as a global conservation priority. Based on interviews and field observations, the species that are consumed are identified, as well as the locations within the ecosystem where they are harvested. Attention is also drawn to the gendered practices that inform collection and preservation. Edible shellfish hold considerable potential for monitoring mangrove ecosystem health, which is increasingly affected by deforestation and rising and acidifying seas. This paper highlights the importance of collaborating with local peoples who have cultural and economic ties to mangrove forests and ethnobiological knowledge about the management of these resources, which are essential for the development of effective conservation strategies.

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Section: Resultsmentioning

confidence: 99%

Section: The Threatened Mangrove Biomementioning

confidence: 99%

Shellfish Collection in Senegambian Mangroves: A Female Knowledge System in a Priority Conservation Region

Carney¹

2017

Journal of Ethnobiology

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“…This species also has some medicinal values. For instance, because of its high iodine content, it has been used for the treatment of endemic goitre [10].…”

Section: Introductionmentioning

confidence: 99%

“…Millions of T. fuscatus are transported in jute bags on a daily basis to the markets for sale. It is a relatively cheap source of animal protein and its shell is commonly used as source of calcium and phosphate in livestock feed and as ornaments [7][8][9][10]. This species also has some medicinal values.…”

Section: Introductionmentioning

confidence: 99%

Assessment of length-weight relationship and condition factor of periwinkle (Tympanotonus fuscatus, Linnaeus 1758) from okrika estuary, niger-delta area of nigeria.

Solomon¹,

Ahmed²,

Kunzmann³

2017

Environ Risk Assess Remediat

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Assessment of length-weight relationship and condition factor of a commercially important mollusc species, Periwinkle, Tympanotonus fuscatus, from Okrika estuary was conducted from October, 2015 to February, 2016. A total of 120 samples of the species were hand-picked from the mangrove ecosystem of Okrika. The results obtained showed that the gastropod species had negative allometric growth patterns with a growth exponent, b value of 2.18. This value was confirmed as negative allometric, because it was significantly different (p<0.05) from 3 when a t-test was carried out. The mean condition factor, K of the species was 18.9, which indicated that they were in good condition during the sampling period.This study recommends that further research needs to be conducted because the sampling duration (4 months) might be too small to make a valid, rigid and concrete conclusion. Also efforts should be undertaken to reduce the pollution load in order to safe-guard this valuable resource for the local population. AbstractAssessment of length-weight relationship and condition factor of periwinkle (Tympanotonus fuscatus, Linnaeus 1758) from okrika estuary, niger-delta area of nigeria.

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“…Periwinkles are a typical example of shelled fish which is found predominantly in the littoral region of the marine and estuarine habitats having mangrove plants. [1][2][3][4] Periwinkles predominantly belong to three genus including Tympanotonus, Pachymelania and Merceneria. 1 Of the three genera, species of periwinkle that belong to the Tympanotonus and Pachymelania genera are predominant in the Niger Delta region of Nigeria.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of heavy metals in tissue of Tympanotonus fuscatus sold in some markets in port harcourt metropolis, Nigeria

Izah¹

2018

MOJT

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Tympanotonus fuscatus is found in mangrove swamps of the coastal region of the Niger Delta Nigeria. It is a source of protein, Hence it is used in the preparation of delicacies. This study evaluated the level of heavy metals in tissues of Tympanotonus fuscatus sold in some markets in Port Harcourt, Rivers state, Nigeria. Triplicate samples of Tympanotonus fuscatus was purchased from seven different markets within Port Harcourt metropolis. The samples were digested and analyzed using a Flame atomic absorption spectrometer. Results showed that the concentration of the heavy metals ranged from 0.76-1.56mg/kg (nickel), 22.36-29.28mg/kg (zinc), 185.07-921.49mg/kg (iron), 0.05-0.56mg/kg (lead), 80.96-102.62 mg/kg (cobalt) and 19.04-69.45 mg/kg (manganese). Moisture and organic matter contents ranged from 78.88-85.87% and 86.06-92.23% respectively. Analysis of variance showed that there is significant difference (P<0.05) in most of the locations for each of the parameters. The variation that exists could be due to differences in the pollution load of the aquatic habitats from which the samples were harvested. Based on permissible limit, the heavy metals concentration were within allowable limit for fish-food specified by Food and Agricultural Organization/World Health Organization, Median International Standard and European Union except for iron, manganese and copper. The high level of iron, manganese and copper suggests potential health effects.

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A prelimenary study on the population estimation of the periwinkles Tympanotonus fuscatus (Linnaeus, 1758) and Pachymelania aurita (Muller) at the Rumuolumeni mangrove swamp creek, Niger Delta, Nigeria

Cited by 12 publications

References 6 publications

Shellfish Collection in Senegambian Mangroves: A Female Knowledge System in a Priority Conservation Region

Shellfish Collection in Senegambian Mangroves: A Female Knowledge System in a Priority Conservation Region

Assessment of length-weight relationship and condition factor of periwinkle (Tympanotonus fuscatus, Linnaeus 1758) from okrika estuary, niger-delta area of nigeria.

Evaluation of heavy metals in tissue of Tympanotonus fuscatus sold in some markets in port harcourt metropolis, Nigeria

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