Effect of molt stage and hypoxia on osmoregulatory capacity in the peneid shrimp Penaeus vannamei |
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| Institution: | 1. Universidad de Sonora, Departamento de Ciencias Químico-Biológicas y Agropecuarias, Universidad de Sonora Unidad Regional Sur, Apartado Postal 85880, Navojoa, Sonora, México;2. School of Natural Sciences, University of California Merced, 5200 N Lake Road, Merced, CA 95343, USA;3. Centro de Investigación en Alimentación y Desarrollo (CIAD), Carretera a la Victoria KM. 0.6. Hermosillo, Sonora, C.P. 83304, México;1. Campus Universitário de Iturama, Universidade Federal do Triângulo Mineiro, Iturama, MG, Brasil;2. Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil;3. Departamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil;4. Centro de Biologia Marinha, Universidade de São Paulo, São Sebastião, SP, Brasil;5. Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil;1. Laboratory of Aquaculture & Artemia Reference Center, Ghent University, Ghent 9000, Belgium;2. Research Institute for Aquaculture No.2, Ho Chi Minh City 71007, Viet Nam;3. Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium;4. Department of Biology, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada |
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| Abstract: | The osmoregulatory capacity (OC) was used to study the effects of hypoxia in Penaeus vannamei. Since OC varied with molt stages with a tendency for animals to show a reduced OC before and after ecdysis, only shrimps at stages C-D0 were consequently used. Hyper-OC and hypo-OC, respectively, measured at low salinity and in seawater, were both depressed after 1–2 days exposure to low oxygen tension (PO2) ranging from 4 to 8 kPa. Low PO2 effect was time-dependent. OC recovered fully after 24 h in an O2 saturated medium. OC measurement is confirmed as a convenient tool to monitor the physiological condition and the effect of stress in crustaceans. |
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