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Showing 1 to 12 of 12 for “"horseshoe crabs"”.
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Selection of Spawning Habitats by Horseshoe Crabs (Limulus polyphemus) along the Complex Connecticut Coast
<p>The Atlantic horseshoe crab (<em>Limulus polyphemus</em>) is a multiple-use resource that has recently come under environmental conflict. This research focused on the Long Island Sound population of horseshoe crabs and aimed to characterize the coastal habitats of Connecticut by various traits …
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Reducing post-bleeding mortality of horseshoe crabs (Limulus polyphemus) used in the biomedical industry
… effects of blood extraction on the survival of horseshoe crabs and performed a preliminary investigation into amebocyte maintenance in vitro. Hemolymph volume of L. polyphemus was estimated over a representative size range of adults. Hemolymph volume expressed as a percentage of wet body weight …
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A mid-Atlantic study of the movement patterns and population distribution of the American horseshoe crab (Limulus polyphemus)
… with Cambrex, a biomedical company that utilizes horseshoe crabs for the production of Limulus Amoebocyte Lysate (LAL), a study was conducted to investigate movement patterns and population distributions of horseshoe crabs to increase understanding of mid-Atlantic horseshoe crab populations. In …
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A Horseshoe Crab (Limulus polyphemus) Demographic Study
We examined various aspects of horseshoe crab populations in conjunction with BioWhittaker, a biomedical company that bleeds horseshoe crabs (Limulus polyphemus) and utilizes their blood for biomedical purposes. We examined mortality rates of bled and unbled crabs by holding crabs in tanks for …
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Bycatch associated with a horseshoe crab (Limulus polyphemus) trawl survey: identifying species composition and distribution
Horseshoe crabs (Limulus polyphemus) have been harvested along the east coast of the United States since the 1800s, however a Fishery Management Plan (FMP) was only recently created for this species. To date, there have not been any studies that have attempted to identify or quantify bycatch in the …
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Homeobox gene and microRNA duplication in Chelicerata
… evidence of WGDs in the lineages of Xiphosura (horseshoe crabs) and Arachnopulmonata (spiders, scorpions). To gain further support and insights to these possible WGD events, homeobox genes and microRNAs (miRNAs) were systematically identified and characterised in chelicerates with evidence for …
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KEY DEVELOPMENTAL EVENTS IN THE ORIBATID MITE, ARCHEGOZETES LONGISETOSUS, AND THE EVOLUTION OF CHELICERATE BODY PLANS.
… (e.g., spiders, mites, scorpions, harvestmen and horseshoe crabs) are oneof the oldest arthropod clades, arising in the Cambrian. The chelicerates display a conserved body plan comprising of an anterior prosoma and a posterior opisthosoma. The prosoma comprises the segments bearing the chelicerae, …
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Head and protocerebral patterning in the spider Parasteatoda tepidariorum
Chelicerates (including spiders, scorpions, horseshoe crabs, mites and ticks) diverged from other mandibulate arthropods (insects, crustaceans, centipedes and millipedes) around 500 million years ago, making them good models to study whether traits and mechanisms of development are ancestral or …
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Design and Model-based Approaches for Estimating Abundance of American Horseshoe Crab
The American horseshoe crab (HSC), Limulus polyphemus, is one of four species of horseshoe crabs found throughout the world, and the only one found in North America. It is an economically and ecologically important species throughout its native range from Maine to the Yucatan Peninsula. Harvested …
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Transport of terrigenous sediment and horseshoe crab eggs in the swash zone of an estuarine foreshore in Delaware Bay, New Jersey, USA
… and South America to feed on nutrient rich horseshoe crab eggs during their peak spawning season. Eggs laid at depth by horseshoe crabs are exhumed and transported by bioturbation, wave and swash processes and made available to foraging shorebirds. The objectives of this dissertation are to: …
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Investigating the evolution and function of Wnt ligands
… as spiders and scorpions have lost Wnt10. In horseshoe crabs, spiders and scorpions, duplications of Wnt7 and Wnt11 were observed. Taking some of the results from this broad evolutionary analysis, it would be interesting to understand on a finer scale how the expression or function of Wnt …
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Bayesian Hierarchical Methods and the Use of Ecological Thresholds and Changepoints for Habitat Selection Models
… a complex data set containing information about horseshoe crab spawning habitat preferences in the Delaware Bay over a five-year period. These data epitomize some of the difficult issues inherent to studying habitat preferences. The data are collected over time at many sites, have missing …