Crustaceans are forced to fast during molting. Several physiological, metabolic and behavioral changes have been associated with starvation. Although some of these changes have been well studied, knowledge of the dynamics of fuel reserves during the molting process is limited. To understand the effects of short-term hunger stress on energy reserves, intermolt shrimpLitopenaeus vannameiwere star...

The present study describes the activity and some characteristics of proteinases in the hepatopancreas of red shrimp Pleoticus muelleri during the different stages of the molting cycle. Proteolytic activity was highest between pH 7.5 and 8. The hepatopancreatic protein content in the premolt stage was higher than in the other stages of the molting cycle (P<0.05). No significant differences were...

The present study was conducted to test the hypothesis that dietary arginine promotes digestion and absorption capacity, and, thus, enhances fish growth. This improvement might be related to the target of rapamycin (TOR) and eIF4E-binding protein (4E-BP). A total of 1200 juvenile Jian carp, Cyprinus carpio var. Jian, with an average initial weight of 6.33 (SE 0.03) g, were fed with diets contai...

ATP-dependent Ca2+ uptake was determined into inside-out basolateral membrane vesicles (BLMV) from intermolt crayfish (Procambarus clarkii) Ca2+-transporting epithelia: gill, hepatopancreas (liver), and antennal gland (kidney). Extravesicular (EV) ATP (5 mM) increased 45Ca2+ uptake (free Ca2+ 5 microM) by fivefold but was abolished by pretreatment with either vanadate or the ionophore A-23187. ...

The contamination and distribution of organochlorinated compounds were considered in three crustacean species (edible crab, Cancer pagurus; spider crab, Maja brachydactyla; velvet swimming crab, Necora puber) from five sites along the coasts of Brittany and Normandy (Western and North-Western France). PCBs (16 single congeners), pp'-DDE and HCB were measured in hepatopancreas, gonads and muscle...

5 Previous investigations on the military relevant metal, tungsten (W), have paved the way for further 6 exploration of its relevant environmental and biological pathways. This investigation presents the most 7 robust known trophic transfer study of W between plant and animal models. Steady state of W in 8 cabbage (Brassica oleracae) was reached at 114-days with a bioaccumulation factor (BAF) o...

Inhibitors of apoptosis proteins (IAPs) maintain a balance between cell growth and death by suppressing caspase activity modulating immunological responses. Here, two IAPs (EhIap1 EhIap2) were identified from Eriocheir hepuensis using RT-PCR technology characterized bioinformatics software. Sequence analysis showed that the open reading frames EhIap1 EhIap2 composed 1,839 bp 696 encoded 612 ami...

A multi-method approach was employed to compare the responses of Glutatione Transferases (GSTs) in the gills and hepatopancreas of Venerupis philippinarum to microcystins (MCs) toxicity. In this way, using the cytosolic fraction, the enzymatic activity of GSTs, superoxide dismutase (SOD), serine/threonine protein phosphatases (PPP2) along with the gene expression levels of four GST isoforms (pi...

Accumulation of cadmium in the hepatopancreas of the common prawn Palaemon serratus (Pennant) and ultrastructural changes m hepatopancreatic cells were examined after exposure to 3 cadmium concentrations (5, 25.50 ppm) for 44 h. Accumulation of cadmium Ions in 50 ppm solution was 800 % higher compared with control specimens. Absorptive and fibrillar cells (Rand F-cells) in the hepatopancreas we...