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  • Aberdeen University Press  (1)
  • InterResearch  (1)
  • Oxford Univ. Press  (1)
  • 1
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    Multiple paternity within the brood of single females of Loligo forbesi (Cephalopoda:Loliginidae), demonstrated with microsatellite DNA markers (1997)
    InterResearch
    In:  Marine Ecology Progress Series, 160 . pp. 279-282.
    Details
    Publication Date: 2021-04-21
    Description: Microsatellite DNA markers developed for the squid Loligo forbesi were used to determine the genotype of a series of embryos obtained from egg strings of individual females. The results demonstrate that at least 2 males had been successful in fertilizing the eggs of a single female. The findings are compatible with observations of male competition at mating in other species of loliginid squid. They are discussed in relation to interpretation of specific questions of cephalopod ecology.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.3354/meps160279
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
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    Resolution of multiple cohorts in the Loligo forbesi population from the west of Scotland (1999)
    Oxford Univ. Press
    In:  ICES Journal of Marine Science, 56 (4). pp. 500-509.
    Details
    Publication Date: 2021-06-17
    Description: Length–frequency analysis was employed to resolve multiple cohorts in the Loligo forbesi population from coastal waters to the west of Scotland. In both male and female squid two principal cohorts were identified, recruiting to the fished population in April and November. Both cohorts spawned during the winter months (November to April), producing a single extended spawning season, with the April recruits of larger size at spawning than the November recruits. In the males the April recruits appeared to separate into two cohorts of different growth rates, thus producing three rather than two sizes at maturity. The abundance of L. forbesi was low during the summer months, indicating that the squid had moved outside the range of the fishery, perhaps into deeper water. Abundance declined during the spawning season, which is interpreted as post-spawning mortality. Abundance declined earlier in the males than females, producing a female biased sex ratio during most of the spawning season. The two periods of recruitment are not compatible with a 1 year life cycle and single extended spawning season and explanations of this are discussed.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1006/jmsc.1999.0485
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 3
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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
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    OceanRep: Book chapter
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