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Annual macrofauna production in a Venus community
Warwick, R.M.; George, C.L.; Davies, J.R. (1978). Annual macrofauna production in a Venus community. Estuar. Coast. Mar. Sci. 7: 215-241
In: Estuarine and Coastal Marine Science. Academic Press: London. ISSN 0302-3254, more
Peer reviewed article  

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Keywords
    Biological production; Biomass; Community composition; Zoobenthos; Astropecten irregularis (Pennant, 1777) [WoRMS]; Bivalvia [WoRMS]; Donax vittatus (da Costa, 1778) [WoRMS]; Echinocardium cordatum (Pennant, 1777) [WoRMS]; Echinodermata [WoRMS]; Ensis siliqua (Linnaeus, 1758) [WoRMS]; Glycera alba (O.F. Müller, 1776) [WoRMS]; Lumbrineris latreilli Audouin & Milne Edwards, 1834 [WoRMS]; Magelona papillicornis McIntosh, 1878 non F. Müller, 1858 [WoRMS]; Magelona papillicornis F. Müller, 1858 [WoRMS]; Nephtys hombergii Savigny in Lamarck, 1818 [WoRMS]; Ophiura texturata Lamarck, 1816 [WoRMS]; Pharus legumen (Linnaeus, 1758) [WoRMS]; Sigalion mathildae Audouin & Milne Edwards in Cuvier, 1830 [WoRMS]; Spiophanes bombyx (Claparède, 1870) [WoRMS]; Tellina fabula Gmelin, 1791 [WoRMS]; Tharyx marioni (Saint-Joseph, 1894) [WoRMS]; Venus Linnaeus, 1758 [WoRMS]; Venus striatula da Costa, 1778 [WoRMS]; Marine

Authors  Top 
  • Warwick, R.M., more
  • George, C.L.
  • Davies, J.R.

Abstract
    A station representative of the Venus community in Carmarthen Bay, S. Wales, has been sampled regularly between February 1974 and March 1975 with a Knudsen sampler, Day grab and naturalist's dredge. Estimates of annual production of the 15 most important macrofauna species in the community have been made using the techniques of cohort growth analysis. Annual production, mean annual biomass (g ash-free dry wt./m2 ) and the P/B ratio for each species were as follows: Pharus legumen; P = 16 . 119, B = 28 . 816, P/B = 0 . 56. Spiophanes bombyx; P = 3 . 345, B = 0 . 688, P/B = 4 . 86. Ensis siliqua; P = 1 . 372, B = 5 . 100, P/B = 0 . 27. Nephtys hombergi; P = 0 . 935, B = 0 . 492, P/B = 1 . 90. Donax vittatus; P = 0 . 721, B = 0 . 344, P/B = 2 . 10. Magelona papillicornis; P = 0 . 685, B = 0 . 625, P/B = 1 . 10. Venus striatula; P = 0 . 616, B = 1 . 496, P/B = 0 . 41. Ophiura texturata: P = 0 . 458, B = 0 . 672, P/B = 0 . 68. Tellina fabula; P = 0 . 292, B = 0 . 325, P/B = 0 . 90. Glycera alba; P = 0 . 281, B = 0 . 291, P/B = 0 . 97. Sigalion mathildae; P > 0 . 165, B = 0 . 376, P/B = 0 . 44. Lumbrineris latreilli; P = 0 . 120, B = 0 . 092, P/B = 1 . 30l Tharyx marioni- P = 0 . 015, B = 0 . 018, P /B = 0 . 79. Astropecten irregularis; P = 0 . 0004, B = 0 . 073, P/B = 0 . 005. Echinocardium cordatum; P = -0 . 012, B = 5 . 138, P/B = -0 . 02. The total annual production was 25 . 815 g m-2 year-1 and the mean biomass 45 . 793 g m-2 , giving an overall P/B for the community of 0 . 56. These values are discussed in relation to other communities for which comparable data are available.

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