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Morphology Of Rhogocytes In Megathura Crenulata And Their Synthesis Of Keyhole Limpet Hemocyanin., Alanna Martin, Gary Martin, Robert Butler
Morphology Of Rhogocytes In Megathura Crenulata And Their Synthesis Of Keyhole Limpet Hemocyanin., Alanna Martin, Gary Martin, Robert Butler
Gary Martin
Rhogocytes are morphologically distinct cells distributed throughout connective tissues of crustaceans and molluscs. Using light microscopy, rhogocytes of the vetigastropod Megathura crenulata were identified by their ovoid shape, and their cytoplasm filled with spherical inclusions which contained lysosomal enzymes, based on uptake of neutral red and staining with LysoTracker dye. Rhogocytes were most abundant in the digestive gland (2,824 rhogocytes/mm2), followed by the connective tissue layer surrounding the middle and posterior esophagus and intestine (1,431 rhogocytes/mm2, 872 rhogocytes/mm2, and 1,190 rhogocytes/mm2, respectively), and were lowest in abundance in the foot (154 rhogocytes/mm2). At the transmission electron microscopy level, characteristic features …
Impact Of Mineral Deposits On Shrimp Penaeus Monodon In A High Alkaline Water., A. Gopalakrishnan, M. Rajkumar, Jun Sun, Gary Martin, A. Parida
Impact Of Mineral Deposits On Shrimp Penaeus Monodon In A High Alkaline Water., A. Gopalakrishnan, M. Rajkumar, Jun Sun, Gary Martin, A. Parida
Gary Martin
This study compares water quality parameters, shrimp growth and mortality rates, and biomass at harvest in two ponds of equal size, seeded with the same density (7 m2) of White Spot Syndrome Virus (WSSV) and Monodon Baculo Virus (MBV) negative post-larvae (PL)-20 of shrimp, Penaeus monodon in the Vellar estuary of South India. The primary difference between the ponds was the water source; one was filled from the estuary and the second with water from bore wells with high alkalinity. Temperature in both ponds was similar and reached 320C after 185 days of culture. Dissolved oxygen (DO) levels were within …
Production Of Digestive Enzymes Along The Gut Of The Giant Keyhole Limpet Megathura Crenulata, Gary Martin, Alanna Martin, Whitney Tsai
Production Of Digestive Enzymes Along The Gut Of The Giant Keyhole Limpet Megathura Crenulata, Gary Martin, Alanna Martin, Whitney Tsai
Gary Martin
The esophagus and intestine form the longest regions of the digestive tract in the giant keyhole limpet and are lined by epithelial cells sharing a common morphology and releasing materials into the gut lumen by apocrine secretion. The purpose of this study was to determine if these morphologically similar regions release similar digestive enzymes and compare their contributions to digestive enzymes released from other regions of the gut. Principal component analysis of enzymes detected by the API ZYM system for 19 enzymes plus EnzChek assays for protease, α-amylase, lipase, cellulase, and lysozyme identify four distinct regions of the gut: 1) …