Hemocytes of the American lobster (Homarus americanus H. Milne Edwards) were classified after examination of Wright-Giemsa stained cytocentrifuge preparations by brightfield light microscopy. Eleven hemocyte types were identified using morphologic criteria. The classification system was then used to monitor changes in the differential hemocyte count (DHC) of lobsters infected with the Gram positive coccus Aerococcus viridans var. homari, etiologic agent of gaffkemia. The appearance of less mature hemocytes in the DHCs of lobsters in the late stages of infection was similar to the 'left shift' of vertebrate inflammation. Results from this study suggest that DHCs can be used to assess and characterize inflammation in H. americanus and possibly other crustaceans.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jip.2003.11.005 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Ocean warming and acidification alter calcification and innate immune system gene expression in juvenile American lobsters, Homarus americanus.
Comp Biochem Physiol Part D Genomics Proteomics
December 2024
School for the Environment, University of Massachusetts Boston, Boston, MA 02125, USA; Presidents Office, Ursinus College, Collegeville, PA 19426, USA.
Article Synopsis
- The Gulf of Maine is facing severe ocean warming and acidification, impacting the American lobster, with limited research on how these stressors interact specifically on gene expression.
- Two aquarium experiments were conducted that simulated future ocean conditions to assess the effects of these stressors on juvenile lobsters' gene expression, revealing complex responses in genes related to calcification and immune function.
- Findings indicate that elevated temperatures significantly affect gene expression, potentially leading to impaired normal development and increased vulnerability to disease due to these combined stressors.
Exposure of female lobsters to sediments spiked with emamectin benzoate: Effects on eggs and larvae early development.
Sci Total Environ
October 2024
Saint Andrews Biological Station, 125 Marine Science Drive, Saint Andrews, NB E5B 0E4, Canada. Electronic address:
The salmon aquaculture industry is an important economic activity established on both the west and east coast of Canada. To control sea lice infestations, in-feed products like emamectin benzoate (EMB) are widely used. Due to its low solubility and persistence EMB can accumulate in marine sediments and be potentially bioavailable to non-target organisms from months to years.
View Article and Find Full Text PDFRearing condition influences gene expression in postlarval American lobster (Homarus americanus).
PLoS One
July 2024
University of New England, School of Marine and Environmental Programs, Biddeford, Maine, United States of America.
The American lobster (Homarus americanus) is an economically important species in the western Atlantic and its climate-driven range shift northward along the east coast of the United States is well documented. The thermal tolerance of lab-reared postlarvae of this species has been extensively investigated to better understand settlement and recruitment dynamics. However, there have been few studies focused on wild-caught postlarvae, and even fewer that have analyzed lab-rearing conditions in context of diet.
View Article and Find Full Text PDFArticle Synopsis
- * Researchers measured heart and ventilation rates of lobsters in a controlled environment, finding that both rates increased with temperature, peaking at around 26.5 °C for heart rate and 27.4 °C for ventilation.
- * Results indicated discrepancies between heart rates of confined lobsters and those moving freely, highlighting that experimental methods can significantly influence physiological measurements in marine species studies.
Neuropeptidomics of the American Lobster .
J Proteome Res
May 2024
School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States.
The American lobster, , is not only of considerable economic importance but has also emerged as a premier model organism in neuroscience research. Neuropeptides, an important class of cell-to-cell signaling molecules, play crucial roles in a wide array of physiological and psychological processes. Leveraging the recently sequenced high-quality draft genome of the American lobster, our study sought to profile the neuropeptidome of this model organism.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!