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Closed Access item Daily activity patterns of the mud shrimp Solenocera membranacea (Decapoda: Penaeoidea: Solenoceridae) in the western Mediterranean: a Comparison by Depth and Season
Company, Joan B.
García, José A.
|Publisher:||Rosenstiel School of Marine and Atmospheric Science|
|Citation:||Bulletin of Marine Science 79(2):353-364 (2006)|
|Abstract:||The diel catchability patterns of the western Mediterranean warm and temperate
water mud shrimp Solenocera membranacea (Risso, 1816) were studied as a proxy of
its behavioral activity in relation to depth and season. Animals were sampled with
an epibenthic trawl during four continuous 24-hr cycles of trawl hauls made on the
continental shelf (100–110 m) and slope (400–430 m) in October (autumn equinox)
and June (summer solstice). Density estimates of animals present on the bottom at
the time of the haul were computed from captures. Time series revealed marked
rhythmic behavioral on-bottom activity. In both seasons, activity was nocturnal on
the continental shelf. A less marked diurnal rhythm was present on the slope with
emergence phased in the afternoon. Emergence patterns at both depths showed a
regulation with seasonal variations in photoperiod length. Analysis of the catch size
structure did not reveal significant differences between depths and seasons, indicating
that behavioral performance is not affected by sexual maturity.|
|Description:||12 pages,6 figures,1 table|
|Appears in Collections:||(ICM) Artículos|
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