The Primary Producers of the Inshore Regions of the Benguela

Jarman, N. G.; Carter, R. A.

doi:10.1080/00359198109520577

Cited by 24 publications

(16 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Growth of suspension feeding bivalves is related to food availability (Jensen, 1992(Jensen, , 1993Nair, Dalal, & Ansari, 1978;Nakaoka, 1992;Peterson, 1982;Sastre, 1984;Wade, 1968), which can get limited at exposed sandy beaches (Defeo, Ortiz, & Castilla, 1992;Lima, Brazeiro, & Defeo, 2000). Consequently, the high (Jarman & Carter, 1981;Walsh, 1981) and year-round (Schulz, 1982;Weeks & Shillington, 1994) primary production in upwelling areas might be the major cause for the observed higher OGP of upwelling donacids. Another reason may be the narrower annual temperature range of permanent coastal upwelling areas (about 10 C) compared with boreal regions (about 30 C), which facilitates settlement of stenothermic species (e.g.…”

Section: Growth Data and Growthmentioning

confidence: 99%

Population structure, growth and production of the surf clam Donax serra (Bivalvia, Donacidae) on two Namibian sandy beaches

Laudien

Brey

Arntz

2003

Estuarine, Coastal and Shelf Science

View full text Add to dashboard Cite

Population structure, growth and production of the surf clam Donax serra (Bivalvia, Donacidae), inhabiting highly exposed sandy beaches of Namibia, were investigated between November 1997 and December 1999. From length-frequency distribution and tagging-recapture data, a von Bertalanffy growth function with an asymptotic length (L 1 ) of 82 mm and a growth constant (K) of 0.274 yr ÿ1 was established. Regarding growth performance of Donacidae, D. serra fits in a group of species inhabiting cold temperate and upwelling regions. The intertidal biomass of the studied population ranged between 141 and 546 g ash-free dry mass (AFDM) m ÿ2 yr ÿ1 . Individual production was maximal at 56.5 mm shell length (0.83 g AFDM ind. ÿ1 yr ÿ1 ), and annual production ranged between 167 and 637 g AFDM m ÿ2 yr ÿ1 , resulting in productivity values ðP=B Þ between 1.167 and 1.589 yr ÿ1 . These data underline the importance of D. serra for the beach/surf ecosystem. Further, the findings of this study are crucial to support future aquaculture or exploitation activities and management.

show abstract

Section: Growth Data and Growthmentioning

confidence: 99%

Population structure, growth and production of the surf clam Donax serra (Bivalvia, Donacidae) on two Namibian sandy beaches

Laudien

Brey

Arntz

2003

Estuarine, Coastal and Shelf Science

View full text Add to dashboard Cite

show abstract

“…1979, Bolton and Levitt 1985, Probyn and McQuaid 1985, Bolton and Anderson 1987, J oska and Bolton 1987, their alginate content (Yon Holdt et al 1955, Hay et al 1983, and their role in the inshore food web (Field et al 1977, 1980a, 1980b, Yelimirov et al 1977, Yelimirov and Griffiths 1979, Mazure and Field 1980, Newell et at. 1980, Allen and Griffiths 1981, Jarman and Carter 1981.…”

Section: Brown Seaweeds (Phaeophyceae)mentioning

confidence: 99%

“…Field et at. (1980a) estimated the biomasses of E. maxima in six kelp beds between Cape Agulhas and Saldanha Bay, and Jarman and Carter (1981) used some of these data to estimate the total wet biomass of the species between Cape Columbine and Cape Point at about 550 000 tons (72 000 tons dry). Between Cape Point and Cape Agulhas, aerial surveys and sample-on-site measurements in selected line-transects can be combined to give a wet biomass of 114000 tons (14820 tons dry).…”

Section: Brown Seaweeds (Phaeophyceae)mentioning

confidence: 99%

Commercial seaweeds in southern Africa: a review of utilization and research

Anderson¹,

Simons²,

Jarman³

1989

South African Journal of Marine Science

Self Cite

View full text Add to dashboard Cite

“…J . Ag., is estimated at 1.17 kg C m-' yr-' (Jarman and Carter, 1982). Phytoplankton production estimates for water offshore of the kelp bed in the Southern Benguela upwelling plume range from 0.8 to 1.4 kg C m-2 yr-' (Brown, 1980(Brown, , 1982.…”

Section: Introductionmentioning

confidence: 99%

Phytoplankton Biomass and Production in a Southern Benguela Kelp Bed System

Carter¹

1982

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Seasonal variation in phytoplankton biomass and production in the vicinity of a Southern Benguela kelp bed is studied in relation to the upwelling cycle. Mean phytoplankton biomass was estimated as 56 mg chl a m -2 and phytoplankton production as 1.13 kg C m-'yr-' The top 10 m of the 20 m deep water column monitored contained 83 % of the b~omass and 76.5% of the production. Daily and seasonal variations in phytoplankton are described.

show abstract

The Primary Producers of the Inshore Regions of the Benguela

Cited by 24 publications

References 8 publications

Population structure, growth and production of the surf clam Donax serra (Bivalvia, Donacidae) on two Namibian sandy beaches

Population structure, growth and production of the surf clam Donax serra (Bivalvia, Donacidae) on two Namibian sandy beaches

Commercial seaweeds in southern Africa: a review of utilization and research

Phytoplankton Biomass and Production in a Southern Benguela Kelp Bed System

Contact Info

Product

Resources

About