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Some aspects of the ecology of Peloscolex benedeni Udekem (Oligochaeta: Tubificidae) in the Thames estuary
Hunter, J.; Arthur, D.R. (1978). Some aspects of the ecology of Peloscolex benedeni Udekem (Oligochaeta: Tubificidae) in the Thames estuary. Estuar. Coast. Mar. Sci. 6(2): 197-208. https://dx.doi.org/10.1016/0302-3524(78)90101-9
In: Estuarine and Coastal Marine Science. Academic Press: London. ISSN 0302-3254; e-ISSN 1878-3023, meer
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoorden
    Abundance
    Cycles > Life cycle
    Ecology
    Temporal variations > Periodic variations > Seasonal variations
    Oligochaeta [WoRMS]; Tubificoides benedii (d'Udekem, 1855) [WoRMS]
    Brak water
Author keywords
    intertidal mud habitat; Vertical migration; oxygen tolerance; Thames estuary
Auteurs  Top 
  • Hunter, J.
  • Arthur, D.R.
Abstract
    Although Peloscolex benedeni is one of the commonest marine and estuarine tubificids, little has been published on the ecology of this species. P. benedeni is the dominant littoral species in the Cliffe region of the lower Thames estuary, reaching densities of up to 142 × 103 m−2 in association with Tubifex costatus Claparède and Caulleriella sp. The stages in the reproductive cycle are described. The highest proportion of mature worms in the population occurs in late winter and spring and the peak of breeding worms in early summer. These stages precede the main peak in cocoon density. The proportion of breeding worms and the density of cocoons are greater in the deeper sediment layers than in the superficial layer. Experiments showed that P. benedeni tolerated oxygen concentrations as low as 7·2% of air saturation with negligible mortality over 7 days; at the lowest level tested (1·2% of air saturation) 37% of adult worms and 52% of newlyhatched worms died.
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