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Thermal preference, tolerance and temperature-dependent respiration in the California sea hare <i>Aplysia californica</i>

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Agricultural Sciences 2013年第6期4卷 46-52页

作者： Ana Denisse Re Fernando Díaz Alfredo Salas-Garza Marco Gonzalez Victor Cordero Clara E. Galindo-Sanchez Edna Sanchez-Castrejon Adolfo Sánchez Zamora alexei licea-navarro Instituto de Investigaciones Oceanológicas Universidad Autónoma de Baja California Ensenada Baja California México Laboratorio de Biología Celular y Molecular Departamento de Biotecnología Marina Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE) Ensenada Baja California México Laboratorio de Ecofisiología de Organismos Acuáticos Departamento de Biotecnología Marina Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE) Ensenada Baja California México Laboratorio de Ecofisiología de Organismos Acuáticos Departamento de Biotecnología Marina Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE) Ensenada Baja California México Laboratorio de Genómica Funcional Departamento de Biotecnología Marina Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE) Ensenada Baja California México Unidad Multidisciplinaria de Docencia e Investigación Facultad de Ciencias Universidad Autónoma de México Sisal México

The thermoregulatory behavior of sea hare Aplysia californica was determined in a horizontal thermal gradient;with a preferred temperature (PT) of 18.3°C for the day cycle and 20.8°C for the night cycle. The displacement velocity demonstrated an initial rate of 30 cm·hˉ1 and gradually the velocity diminished to 18 cm·hˉ1 with several fluctuations mainly at 02:00 am. Critical Temperature Maxima (CTMax refers to the temperature point where at least 50% of the experimental group have a loss of attachment) was measured at three acclimation temperatures (16°C, 19°C and 22°C). At the lowest acclimation temperature (16°C), 50% of the experimental group had an attachment loss at CTMax 32.7°C, and in a higher acclimation temperature (22°C) CTMax was 36.2°C. The Oxygen Consumption Rate (OCR) was closely correlated to acclimation temperature, and at 16°C and 19°C sea hare had a relatively stable metabolic rate, with OCR increasing to 9 mg O2 hˉ1·kgˉ1 w.w. in a higher acclimation temperature.

关键词： Thermoregulatory Behavior CTMax Oxygen Consumption Aplysia californica

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Litopenaeus vannamei immunestimulated with Macrocystis pyrifera extract:improving the immune response against Vibrio campbellii

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Journal of Coastal Life Medicine 2014年第8期 617-624页

作者： Liliana Noemi Sánchez Campos Fernando Díaz Herrera Ana Denisse Re Araujo Ricardo Alberto Gonzalez Sánchez Marcial Leonardo Lizárraga Partida Manuel de Jesús Acosta Ruiz alexei Fedorovish licea navarro Molecular Immunology Laboratory Marine Biotechnology DepartmentCenter for Scientific Research and Higher Education of Ensenada(CICESE)3918 Ensenada Tijuana Road Ensenada Baja CaliforniaMexico Ecophysiology of Aquatic Organisms Laboratory Marine Biotechnology DepartmentCenter of Scientific Research and High Education of Ensenada Baja California3918 Ensenada Tijuana Road Ensenada Baja CaliforniaMexico Molecular Ecology Laboratory Marine Biotechnology DepartmentCenter of Scientific Research and High Education of Ensenada Baja California3918 Ensenada Tijuana Road Ensenada Baja CaliforniaMexico Functional Nutrition Laboratory Marine Biotechnology DepartmentCenter of Scientific Research and High Education of Ensenada Baja California3918 Ensenada Tijuana Road Ensenada Baja CaliforniaMexico

Objective:To examine the immune responses of Litopenaeus vannamei after different treatments with a hot water extract of Macrocystis pyrifera(***)and a subsequent challenge with Vibrio campbellii(***).Methods:A total of 184 adult white shrimp that were infected with ***(1×10^(6) CFU/shrimp)were immunostimulate by the hot-water extract from *** via either injection(10μg)or immersion(350 mg/L),the experimental controls were injected with either saline solution or ***(1×10^(6) CFU/shrimp).The bacterial DNA depuration rate,antimicrobial activity and total hemocyte count were evaluated in hemolymph samples at 2,6,12,24,48 and 72 h ***:Injected shrimp(10μg *** extract)demonstrated the best clearance of bacterial infection,with 82%survival at 72 h post-infection(cellular response).Hemolymph from the immersed organisms had the best antimicrobial activity against Escherichia coli growth;specifically,the most efficient antimicrobial activity was observed at 24 h *** types of immunostimulated shrimp had similar total hemocyte counts at 24 h post-infection(1.63-1.59 million/mL);however,after 72 h,injected shrimp had higher total hemocyte counts than immersed animals(2.59 v.s.0.56 million/mL).Conclusions:The injection of the *** hot-water extract facilitated a more efficient response to *** infection due to the stimulation of the hemocytes of the *** other words,the cellular immune response was more efficient to eliminate bacterial infection than the humoral response in shrimp.

关键词： Immune stimulation Hot-water extract Clearance rate Antimicrobial activity Seaweed Vibrio campbellii Litopenaeus vannamei Macrocystis pyrifera PCR

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