Vertical distribution and population structure of the necrophagous amphipod Eurythenes gryllus in the West European Basin
Christiansen, B.; Pfannkuche, O.; Thiel, H. (1990). Vertical distribution and population structure of the necrophagous amphipod Eurythenes gryllus in the West European Basin. Mar. Ecol. Prog. Ser. 66(1-2): 35-45. https://dx.doi.org/10.3354/meps066035
In: Marine Ecology Progress Series. Inter-Research: Oldendorf/Luhe. ISSN 0171-8630; e-ISSN 1616-1599, more
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| Keywords |
Aquatic communities > Nekton
Body size
Developmental stages > Juveniles
Population characteristics > Population structure
Population characteristics > Population structure > Sex ratio
Properties > Biological properties > Sexual maturity
Amphipoda [WoRMS]; Eurythenes gryllus (Lichtenstein in Mandt, 1822) [WoRMS]
Marine/Coastal |
| Authors | | Top |
- Christiansen, B.
- Pfannkuche, O.
- Thiel, H.
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| Abstract |
During 3 cruises to the West European Basin benthopelagic nekton was captured by use of an acoustically released vertical array of 8 to 10 baited traps. The traps were exposed from 5 to 1000 m above the bottom. Nearly all of the 1962 amphipods trapped in total during 18 deployments were identified as the lysianassid amphipod Eurythenes gryllus . Most individuals were recovered from traps deployed 15 m above the sea floor. Above 30 m, catch rates decreased significantly. However, the vertical distribution differed by age and sex: indeterminate juveniles and adult females were only trapped up to 50 m above the bottom. Catch rates of juvenile males and females decreased with increasing distance from the bottom, whereas adult males showed a bimodal distribution with maxima at 15 and at 300 m above the sea floor. Males were prevalent in all but 2 deployments. |
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