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Behavioural and physiological responses of juvenile geoduck (Panopea zelandica) following acute thermal stress
This study focused on characterising animal behaviour, haemocyte characteristics, and heat shock protein (HSP70 & HSP90) mRNA expression following exposure to elevated temperatures, such as those encountered during marine heatwaves around 20 °C and an extreme scenario of 25 °C, contrasted to an ambient temperature of 17 °C. After 24 h of heat challenge, P. zelandica were found to be significantly influenced by the thermal changes, as there were differences recorded in all the responses examined. With increasing temperatures, juvenile geoducks were observed to fully emerge from the sediment a behaviour that has not p...
Source: Comparative biochemistry and physiology. Part B, Biochemistry and molecular biology. - August 13, 2023 Category: Biochemistry Authors: Shaneel S Sharma Leonie Venter Emily J Frost Andrea C Alfaro Norman L C Ragg Leonardo N Zamora Source Type: research

Sequence identification and expression characterization of leptin in the spotted scat, Scatophagus argus
Comp Biochem Physiol B Biochem Mol Biol. 2023 Aug 8:110882. doi: 10.1016/j.cbpb.2023.110882. Online ahead of print.ABSTRACTScatophagus argus is an important marine culture fish in South and South-East Asia, including Southeast coastal areas of China. Artificial propagation technology for S. argus is not optimum; thus further studies on its reproduction biology are required. Although previous studies have shown that leptin (Lep) can regulate fish reproduction, the role of lep genes in S. argus is unknown. Herein, in silico analysis showed that S. argus has two lep genes (lepa and lepb). Protein 3D-structure prediction showe...
Source: Comparative biochemistry and physiology. Part B, Biochemistry and molecular biology. - August 10, 2023 Category: Biochemistry Authors: Wan-Xin Li Li-Ting Cai Yan-Ping Huang Yuan-Qing Huang Shu-Hui Pan Zhi-Long Liu Charles Brighton Ndandala Gang Shi Si-Ping Deng Hong-Juan Shi Guang-Li Li Dong-Neng Jiang Source Type: research

pH evaluation in the digestive tract of the pygmy octopus, Paractopus digueti
In conclusion, the pygmy octopus has an acidic pH in its digestive tract under fasting and feeding conditions.PMID:37541336 | DOI:10.1016/j.cbpb.2023.110881 (Source: Comparative biochemistry and physiology. Part B, Biochemistry and molecular biology.)
Source: Comparative biochemistry and physiology. Part B, Biochemistry and molecular biology. - August 4, 2023 Category: Biochemistry Authors: N Perales-Garc ía D Tovar-Ram írez M G Mart ínez-Morales B P Ceballos-V ázquez D A Corona-Rojas M A Salcedo-Meza A Garrido-Mora F Vega-Villasante H Nolasco-Soria Source Type: research

A kinetic characterization of the gill V(H < sup > + < /sup > )-ATPase from two hololimnetic populations of the Amazon River shrimp Macrobrachium amazonicum
Comp Biochem Physiol B Biochem Mol Biol. 2023 Jul 28;268:110880. doi: 10.1016/j.cbpb.2023.110880. Online ahead of print.ABSTRACTThis investigation examines the kinetic characteristics and effect of acclimation to a brackish medium (21 ‰S) on gill V(H+)-ATPase activity in two hololimnetic populations of M. amazonicum. We also investigate the cellular immunolocalization of the enzyme. Immunofluorescence findings demonstrate that the V(H+)-ATPase c-subunit is distributed in the apical pillar cells of shrimps in fresh water but is absent after acclimation to 21 ‰S for 10 days. V(H+)-ATPase activity from the Tietê River po...
Source: Comparative biochemistry and physiology. Part B, Biochemistry and molecular biology. - July 30, 2023 Category: Biochemistry Authors: Leonardo M Fabri Daniela P Gar çon Cintya M Moraes Marcelo R Pinto John C McNamara Francisco A Leone Source Type: research

A kinetic characterization of the gill V(H < sup > + < /sup > )-ATPase from two hololimnetic populations of the Amazon River shrimp Macrobrachium amazonicum
Comp Biochem Physiol B Biochem Mol Biol. 2023 Jul 28:110880. doi: 10.1016/j.cbpb.2023.110880. Online ahead of print.ABSTRACTThis investigation examines the kinetic characteristics and effect of acclimation to a brackish medium (21 ‰S) on gill V(H+)-ATPase activity in two hololimnetic populations of M. amazonicum. We also investigate the cellular immunolocalization of the enzyme. Immunofluorescence findings demonstrate that the V(H+)-ATPase c-subunit is distributed in the apical pillar cells of shrimps in fresh water but is absent after acclimation to 21 ‰S for 10 days. V(H+)-ATPase activity from the Tietê River popula...
Source: Comparative biochemistry and physiology. Part B, Biochemistry and molecular biology. - July 30, 2023 Category: Biochemistry Authors: Leonardo M Fabri Daniela P Gar çon Cintya M Moraes Marcelo R Pinto John C McNamara Francisco A Leone Source Type: research