Distribution, biomass, recruitment and productivity of Anadara senilis (L.) (Mollusca: Bivalvia) on the banc d'Arguin, Mauritania

Wolff, W.J.; Gueye, Abou; Meijboom, A.; Piersma, Theunis; Sall, Mamadou Alassane

doi:10.1016/0077-7579(87)90016-0

Cited by 29 publications

(32 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We arrive at 8 .1 g AFDW M -2 for Anadara and 8 .9 g for all other species in February-April 1986 . As already explained by Wolff et al (1987) our Anadara value of 8 .1 g pertains only to the area of flats we sampled ; when recalculated for the entire area of tidal flats of the Banc d'Arguin its biomass will be about 5 .5 g AFDW m -2 , which is close to the value by Piersma (1982) . For all other species taken together Piersma (1982 : Table 4 .6) presents biomass values per habitat type similar to ours (Table 6) except for the habitat type of `muddy Zostera' .…”

Section: Discussionsupporting

confidence: 85%

“…Wolff et al (1987) arrived at a value of 0.02 y -' for the large bivalve Anadara senilis at the Banc d'Arguin, but they also concluded that this is an aberrant species . The other fauna largely consists of small species with probably short lifecycles as well as small individuals of large species (see also Piersma, 1982) and hence probably has fairly high P/B ratios (Robertson, 1979 ;Banse & Mosher, 1980) .…”

Section: Discussionmentioning

confidence: 99%

“…To this value about 5 .5 g AFDW m -2 has to be added for the large bivalve A . senilis (Wolff et al, 1987).…”

Section: Discussionmentioning

confidence: 99%

“…Before the boat was left the number of paces to the station was estimated and this distance was walked over the flats . At the sampling station the very large bivalve Anadara senilis was sampled by hand using ranked sets sampling by means of 0 .25 m2 quadrats (Wolff et al, 1987). All other species were sampled with a corer of 10 cm internal diameter which was pushed into the sediment to a depth of about 40-45 cm .…”

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Biomass of macrobenthic tidal flat fauna of the Banc d'Arguin, Mauritania

Wolff

Duiven

et al. 1993

Hydrobiologia

Self Cite

View full text Add to dashboard Cite

The biomass of the benthic macrofauna of the tidal flats of the Banc d'Arguin, Mauritania, retained by a sieve of 0 .6 mm, has been estimated . The total biomass amounts to about 17 .0 g ash-free dry weight (AFDW) m -2 in the area sampled (about 300 km 2 ). The large bivalve Anadara senilis is responsible for 8.1 g AFDW m -2, over 100 other species for another 8 .9 g m -2 . The largest biomasses are found near the continental shore ; at the offshore tidal flats benthic filter-feeders are lacking . Seagrass beds, which occupy the larger part of the tidal flats, have an under average biomass . Sebkhas, extremely saline flats above mean high-water mark, contain no live animals . To sustain the consumption of benthic prey by the very abundant wintering shorebirds relatively low P/B ratios are sufficient . 151

show abstract

Section: Discussionsupporting

confidence: 85%

Section: Discussionmentioning

confidence: 99%

“…To this value about 5 .5 g AFDW m -2 has to be added for the large bivalve A . senilis (Wolff et al, 1987).…”

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Biomass of macrobenthic tidal flat fauna of the Banc d'Arguin, Mauritania

Wolff

Duiven

et al. 1993

Hydrobiologia

Self Cite

View full text Add to dashboard Cite

show abstract

“…Now that the phytopigment profiles of sediment samples indicate that on the Banc d'Arguin phytobenthos stocks are possibly not that different from that in nutrient-rich temperate waters, we may have to reconsider the above earlier conclusions. The increase in densities and biomass of A. senilis warrant explanations in terms of reproduction, the recent series of wet years may have triggered successful recruitment (Wolff et al, 1987) and growth. If so, which primary products supported the growing stocks?…”

Section: Molluscan Assemblages and The Benthic Food Chainmentioning

confidence: 98%

Molluscan assemblages of seagrass-covered and bare intertidal flats on the Banc d'Arguin, Mauritania, in relation to characteristics of sediment and organic matter

Honkoop

Berghuis

Holthuijsen

et al. 2008

Journal of Sea Research

View full text Add to dashboard Cite

Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. The Banc d'Arguin, a non-estuarine area of shallows and intertidal flats off the tropical Saharan coast of Mauritania, is characterised by extensive intertidal and subtidal seagrass beds. We examined the characteristics of intertidal seagrass (Zostera noltii) meadows and bare areas in terms of the presence and abundance of molluscs (gastropods and bivalves). To explain observed differences between molluscan assemblages in seagrass and bare patches, some aspects of the feeding habitat (top-5 mm of the sediment) and of food (organic materials) of molluscs were examined. The novelty of this study is that phytopigments were measured and identified to assess source and level of decay (freshness) of organic material in the sediment and to study their importance as an explanatory variable for the distribution of molluscs. Over an area of 36 km 2 of intertidal flats, at 12 sites, paired comparisons were made between seagrass-covered and nearby bare patches. Within seagrass meadows, dry mass of living seagrass was large and amounted to 180 ± 10 g AFDM m − 2 (range 75-240). Containing twice the amount of silt per unit dry sediment mass, seagrass sediments were muddier than bare areas; the relative amount of organic material was also larger. The total number of species of bivalves and gastropods amounted to 27, 14 of which were found only in seagrass areas, 4 only in bare and 9 in both types of habitat. Among the three numerically most abundant species, the bivalves Anadara senilis, Dosinia hepatica and Loripes lacteus, the first was numerically most abundant in bare and the other two in seagrass-covered areas. Bare intertidal areas had greater mean total biomass of molluscs (80.5 g AFDM m ). In both habitats, the bulk of the biomass was made up by A. senilis. Excluding this species, bare mudflats contained on average only 3.1 g AFDM m − 2 and seagrass meadows 6.9 g AFDM m − 2. As compared to previous surveys in 1980-1986, the biomass of A. senilis had increased almost 10-fold and D. hepatica, previously found in very small numbers, had become the most numerous species. However, the total biomass excluding that of A. senilis was similar. Concentrations of phytopigments were similar to those observed at temperate mudflats, indicating that the Banc d'Arguin might not be as oligotrophic as previously thought. Per unit of dry sediment mass, smaller amounts of phytopigments were found in bare than in seagrass areas. Per unit of dry organic material, bare sediments contained most (fresh) phytopigments. This suggests that in seagrass-covered meadows the organic material is more degraded than in bare sediments. Overall, the composition of phytopigments, quite surprisingly, indicated a benthic-diatom-dominated trophic system. Multivariate statistics revealed that patterns of zoobenthic assemblages were correlated with patterns of a combination of fou...

show abstract

Development of Human Impact on Suspension-Feeding Bivalves in Coastal Soft-Bottom Ecosystems

Wolff

NATO Science Series IV: Earth and Environmental Series

View full text Add to dashboard Cite

Distribution, biomass, recruitment and productivity of Anadara senilis (L.) (Mollusca: Bivalvia) on the banc d'Arguin, Mauritania

Cited by 29 publications

References 5 publications

Biomass of macrobenthic tidal flat fauna of the Banc d'Arguin, Mauritania

Biomass of macrobenthic tidal flat fauna of the Banc d'Arguin, Mauritania

Molluscan assemblages of seagrass-covered and bare intertidal flats on the Banc d'Arguin, Mauritania, in relation to characteristics of sediment and organic matter

Development of Human Impact on Suspension-Feeding Bivalves in Coastal Soft-Bottom Ecosystems

Contact Info

Product

Resources

About