Shoaling preferences in decapod crustacea

  title={Shoaling preferences in decapod crustacea},
  author={S. R. Evans and Malcolm Finnie and Andrea Manica},
  journal={Animal Behaviour},
Fish odour triggers conspecific attraction behaviour in an aquatic invertebrate
Without fish odour, the gammarids showed no significant tendency to aggregate, but in fish-conditioned water, they significantly preferred to stay close to conspecifics and Predation risk can, thus, influence gammarid social behaviour.
Evidence of self-organization in a gregarious land-dwelling crustacean (Isopoda: Oniscidea)
This study provides the first evidence of self-organization in a gregarious crustacean, similar as has been widely emphasized in g Regarious insects and eusocial insects.
Population distribution and group structure of the invasive shrimp Palaemon macrodactylus (Caridea: Palaemonidae) living in a fouling community
The results show that P. macrodactylus, inhabiting in the fouling community, are in groups of up to 20 individuals, without sex or size structure and that a positive correlation exists with the goby fish, which suggests a gregarious behaviour, and tolerance to other species using the same area, at least in an environment with high availability of refuges.
Seasonal changes in migratory and predatory activity of two species of gadoid preying on inshore northern shrimp Pandalus borealis.
The cooling in winter may have driven the gadoids to the outer parts of the fjord, which in turn may have aided in the dispersal of the shrimp stock in the following months.
Effects of predation and habitat structure on the abundance and population structure of the rock shrimp Rhynchocinetes typus (Caridea) on temperate rocky reefs
Direct effects of predation on shrimp densities and population structure were weak, but indirect effects on shrimp distribution within reefs appear to have been mediated through behavioural responses, highlighting the need to assess both numerical and behavioural responses of prey to determine the effects of predator loss on mesoconsumer populations.
Winter is cool: spatio-temporal patterns of the squat lobster Munida gregaria and the Fuegian sprat Sprattus fuegensis in a sub-Antarctic estuarine environment
Spatio-temporal patterns of the relative abundance, distribution and potential areas of overlapping of M. gregaria and S. fuegensis in the Beagle Channel are estimated to understand processes in a context of possible opening of fisheries targeting these two species that have key ecological roles in this sub-Antarctic ecosystem.
arasite-induced suppression of aggregation under predation risk in freshwater amphipod ociality of infected amphipods
Testing whether infection with the fish acanthocephalan Pomphorhynchus laevis alters attraction to conspecifics in the amphipod intermediate host Gammarus pulex found it may dilute the probability of transmission for the parasite using fish as definitive hosts.
An Antarctic krill (Euphausia superba) hotspot: population characteristics, abundance and vertical structure explored from a krill fishing vessel
A fishing vessel during regular operation was used for collection of krill demographic and acoustic data on the shelf northwest of South Orkney Islands, and results show a decrease in the proportion of subadult males, partly reflected in an increase in mature adult males.


Fish shoal composition: mechanisms and constraints
  • J. Krause, D. Hoare, R. James
  • Environmental Science
    Proceedings of the Royal Society of London. Series B: Biological Sciences
  • 2000
It is suggested that fish density acts as a constraint on shoal choice, influencing both shoal size and composition, and has implications for studies on information transfer and reciprocal altruism within populations.
Size-segregative behaviour in minnow shoals
The experiment shows that asymmetrical pay-offs in foraging and in response to predator threat are the probable reasons for size-segregation behaviours, and supports the views of earlier workers that mechanical sorting by swimming speed is not an important factor in size segregation in shoals.
Size-assortative shoaling in fish: the effect of oddity on foraging behaviour
  • N. Peuhkuri
  • Environmental Science, Psychology
    Animal Behaviour
  • 1997
The results suggest that the oddity effect is likely to prevent larger sticklebacks from joining shoals of smaller individuals and that factors other than theoddity effect, potentially food competition, may be more important in leading individuals to avoid the company of larger ones and prefer shoaling with matching conspecifics.
Body length assortative shoaling in the European minnow, Phoxinus phoxinus
Collection of free-ranging fish shoals at the study site showed a within-shoal variation of body length consistent with the preference behaviour observed in the laboratory, and the importance of this work in the context of bodylength distributions in free- ranging shoals is discussed.
Social Aggregation in Pelagic Invertebrates
  • D. Ritz
  • Biology, Environmental Science
  • 1994
Further evidence for size‐assortative schooling in sticklebacks
While no interspecific differences were found in responses to school selection, body size and predator presence did affect selection of school-type and in both species, small fish tended to show a stronger preference for matching schools.
Behavioral mechanisms underlying the refuge value of benthic habitat structure for two flatfishes with differing anti-predator strategies
These experiments support an accumulating body of evidence that emergent structure, in otherwise low-relief benthic habitats, may play an important role in the ecology of some juvenile flatfishes.
Phenotypic Variability within and between Fish Shoals
Fish at the study site exhibited a significant association with conspecifics and with individuals of similar body size (within and across species); that is, shoals were assorted by species and by individual body size.
Assortative schooling in three-spined sticklebacks?
It is suggested that, when schooling, it pays for small sticklebacks to group with small fish, as well as a large stickleback, which seems to do better in association with smaller fish than in schools of uniformly large fish.
Age-and sex-dependent patterns of aggregation in the tropical gastropod Strombus luhuanus
It is concluded that intraspecific attraction must be an important factor which maintains the spatial structure of all aggregations, although habitat specificity sets the larger area in which they move.