Topic
Spisula
About: Spisula is a research topic. Over the lifetime, 182 publications have been published within this topic receiving 4189 citations.
Papers published on a yearly basis
1 / 2
Papers
TL;DR: This is a critical review of the global distribution, sources of variation in toxicity, anatomical partitioning, metabolism, and detoxification kinetics of paralytic shellfish poisoning (PSP) toxins (carbamate, TV-sulfocarbamoyl, and decarbamoysl saxitoxin derivatives) in bivalve molluscs.
Abstract: This is a critical review of the global distribution, sources of variation in toxicity, anatomical partitioning, metabolism, and detoxification kinetics of paralytic shellfish poisoning (PSP) toxins (carbamate, TV-sulfocarbamoyl, and decarbamoyl saxitoxin derivatives) in bivalve molluscs. Marked interspecific differences in toxin accumulation are related to differences in toxin sensitivity, determined from neurological, physiological, and behavioral responses. Toxicity also varies considerably with body size, immersion time, off-bottom position, and over distances ≤1 km. Bivalve species can be broadly classified as rapid (e.g., Mytilus eduJis) or slow detoxifiers (e.g., Placopecten mageJJanicus). The former takes weeks to detoxify to the regulatory level (up to 15% toxin loss day−1); the latter takes months to years to detoxify (≤3% loss day−1). Toxin biotransformation, which may lead to changes in net toxicity, varies greatly among species. A few clam species, such as Protothaca staminea and Spisula soli...
508 citations
TL;DR: The influence of various changes in environmental conditions has been investigated and the results correlated with the function of the cortical region of the cytoplasm during the first four or five minutes immediately following stimulation.
Abstract: 1. The present study is a preliminary survey of fertilization and artificial activation in the egg of the surf-clam, Spisula solidissima (Dillwyn).2. The structure of the egg, optimal conditions for fertilization, and normal early development of fertilized and artificially activated eggs are described.3. The results of treatment by various parthenogenetic agents are discussed with particular reference to possible similarities and differences in their mode of action and pattern of response initiated. Among the agents discussed are: ultraviolet irradiation, potassium, sodium, ammonia, osmotic stimuli, heat, cold, urea, and protamine (clupein).4. The influence of various changes in environmental conditions has been investigated and the results correlated with the function of the cortical region of the cytoplasm during the first four or five minutes immediately following stimulation. Monovalent cations, temperature shock, and stimulation in the cold all increase excitability. Divalent ions, stimulation at sli...
202 citations
TL;DR: Serotonin induced spawning in six bivalve species using individual spawning techniques without any additional stimuli is shown to stimulate bivalves to spawn within 15 min.
175 citations
TL;DR: Comparison of the growth curves made for New Jersey clams with other published curves revealed a close correspondence to a curve which was based on a study of growth over a 5-year period.
Abstract: Marked and recovered surf clams, Spisula solidissima Dillwyn, from Virginia (USA) deposited one internal growth line during a period of 11/2 years, probably in response to spawning during late summer. We have used these annual growth lines to make growth curves for two samples of New Jersey (USA) clams, one from inshore (1.8 km from shore, 15 m deep), the other from offshore (17.5 km from shore, 28 m deep) waters. The offshore and inshore clams grow at approximately the same rate until Age 3 years, after which time the growth rates differ, as does the ultimate lifespan; the offshore clams grow more rapidly and attain a greater age — up to 31 years. Comparison of our growth curves with other published curves revealed a close correspondence to a curve which was based on a study of growth over a 5-year period. Curves based on external growth lines probably underestimate growth rate in early life and overestimate it in later years.
125 citations
TL;DR: Stable isotope records across annual growth increments in specimens of the surf clam Spisula solidissima from the mid-Atlantic Bight shelf from 10 m and 45 m depths reflect the changes in temperature and nutrient concentrations on the shelf over the year.
Abstract: Stable isotope records across annual growth increments in specimens of the surf clam Spisula solidissima from the mid-Atlantic Bight shelf from 10 m and 45 m depths reflect the changes in temperature and nutrient concentrations on the shelf over the year. The δ 18 O and δ 13 C records from clams at the two depths record well-mixed conditions in the water column during the winter months and the development of a thermocline during the summer. Spring high productivity and a transient salinity excursion in surface waters are also recorded. Reconstructing the paleoceanography of late Cenozoic temperate continental shelves may be possible using stable isotope records from fossil Spisula solidissima and other bivalves.
115 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 2 |
| 2020 | 2 |
| 2019 | 3 |
| 2018 | 2 |
| 2017 | 2 |
| 2016 | 3 |