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CR 72:111-127 (2017)  -  DOI:

Long-term climatic influences on the physiological condition of the red shrimp Aristeus antennatus in the Western Mediterranean Sea

Ana Carbonell1,*, Pere Joan Llompart2, Magdalena Gaza1, Arnau Mir2, Alberto Aparicio-González1, Diego Álvarez-Barastegui3, Rosa Balbín1, Joan Enric Cartes4

1Instituto Español de Oceanografía, Centro Oceanográfico de Baleares, Muelle de Poniente s/n, 07015 Palma de Mallorca, Islas Baleares, Spain
2Universitat de les Illes Balears, Carretera de Valldemossa, km 7.5. 07122 Palma de Mallorca, Islas Baleares, Spain
3SOCIB, Balearic Islands Coastal Observing and Forecasting System, Parc Bit, Norte, Bloc A 2op., pta. 3, 07121 Palma de Mallorca, Islas Baleares, Spain
4Institut de Cièncias del Mar (CMIMA_CSIC), Psg. Marítim de la Barceloneta 37-49, 08003 Barcelona, Spain
*Corresponding author:

ABSTRACT: Changes in the physiological condition (represented by Kn = body weight/length-predicted weight) of the deep-sea shrimp Aristeus antennatus associated with the warming and rising salinity trends in the western Mediterranean were analyzed to explore how deep-sea populations can reconfigure their biology to match the changes in ocean conditions. Two slope areas around the Balearic Islands (Western Mediterranean Sea) were analyzed using sampling data and generalized additive models. The 23 yr time series of monthly Kn estimates shows 2 different aspects of the life history of A. antennatus, corresponding to 2 different seasonal periods. The Kn series from June through September reflects the shrimps’ reproductive condition to the north of the Islands, while samples from October through May represent a period of low gonad weight and high hepatosomatic indices to the south of the Islands. Oceanographic variables used to construct models and seek relationships with changes in Kn were salinity, temperature, and dissolved oxygen in the Levantine Intermediate Water and Western Mediterranean Deep Water layers, and chlorophyll a satellite imagery data. The North Atlantic Oscillation and the Eastern Atlantic index were used as climatic indicators. Physiologic condition during the winter fattening periods decreased over the time series and was negatively correlated with increasing salinity. During the summer reproductive periods, the best-fitting models show a year-on-year effect and a significant probability of effects on condition from oligotrophication. These results suggest that increasing salinity at depth, which ultimately increases oligotrophy, may cause changes in physiological condition.

KEY WORDS: Aristeus antennatus · Physiological condition · Time series · Fisheries · Climate change · Western Mediterranean

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Cite this article as: Carbonell A, Llompart PJ, Gaza M, Mir A and others (2017) Long-term climatic influences on the physiological condition of the red shrimp Aristeus antennatus in the Western Mediterranean Sea. Clim Res 72:111-127.

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