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  • 1
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    Prey handling and salivary secretions in octopuses (1990)
    Aberdeen University Press
    In:  In: Trophic Relationships in the Marine Environment : Proceedings of the 24. European Marine Biology Symposium. , ed. by Barnes, M. and Gibson, R. N. Aberdeen University Press, Aberdeen, pp. 541-552.
    Details
    Publication Date: 2020-01-17
    Description: Octopuses are known to be highly efficient at the extraction of flesh from their crustacean prey. Experiments on capture and handling of crabs (Carcinus maenas) by the octopus Eledone cirrhosa show that paralysis of the crab invariably precedes hole boring of the carapace. The time course of feeding is described and it is shown that the ingestion of crab meat does not occur before about 40 min after capture for this specific predator-prey interaction although crabs are paralysed after 1-5 min. Comparative observations on hole-boring behaviour are given for Octopus vulgaris and O. dofleini. The results are discussed in relation to recent data on the biochemical composition of the secretions of the posterior salivary gland.
    Type: Book chapter , NonPeerReviewed
    Format: text
    Location Call Number Limitation Availability
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    OceanRep: Book chapter
  • 2
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    Sources of evidence for salmon in the diet of seals (1990)
    Elsevier
    In:  Fisheries Research, 10 (1-2). pp. 137-150.
    Details
    Publication Date: 2020-07-31
    Description: Feeding trials in which salmon was fed to captive seals are described and sources of evidence for the presence of salmon in the diet of seals are evaluated. In faecal samples, the recovery rate of salmon otoliths is too low and bony remains are too fragmented to be useful. Protein extracts from the faeces of salmon-fed captive seals will react with anti-salmon antisera, but the reaction is not strong enough for the methods to be presently applied to field samples. In the digestive tract samples from seals, the use of bony remains for the identification of salmon significantly increases the probability of recognising this species. Protein extracts from digestive tract contents will react positively with anti-salmon antisera and this shows that serological methods can provide evidence for the presence of Salmonidae in the diet of seals, in the absence of solid remains.
    Type: Article , PeerReviewed
    Format: text
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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