Population dynamics of the red shrimp Aristeus antennatus in the Balearic Islands (western Mediterranean): Short spatio-temporal differences and influence of environmental factors

摘要: Abstract The red shrimp Aristeus antennatus is one of the target species bottom trawl fishery Balearic Islands. objective present paper to study short spatial and temporal differences this important economic resource between two different locations off Mallorca (Cabrera: CA; Soller: SO), where a fleet mobility pattern has been detected, influence environmental conditions on species. Six simultaneous bottom-trawl oceanographic surveys were carried out at these in order collect data from demersal species, hydrography (temperature salinity), trophic resources sediment characteristics. commercial both was monitored by monthly on-board sampling, log-books daily landings obtained sales slips. Additional other fishing surveys. Short have detected locations. population CA more demographically homogeneous, while that SO showed variations, like high abundance juveniles recruiting grounds autumn–winter large females during summer. Several also found biology locations, such as males abundant than CA. Also, reproductive period started sooner CA, condition pre-spawning better SO. percentage total lipids hepatopancreas minimal spawning period, showing their importance reserve energy for ovary ripening. Water masses could play an role differences, characteristics water being stable Red adult seemed be correlated with warmer saline Levantine Intermediate Waters, (males females) colder Western Mediterranean Deep only autumn–winter. Two hypothesis patterns are discussed relation observed differences.