Koichi Sekiguchi, Carl N. Shuster Jr. (auth.), John T.'s Biology and Conservation of Horseshoe Crabs PDF

By Koichi Sekiguchi, Carl N. Shuster Jr. (auth.), John T. Tanacredi, Mark L. Botton, David Smith (eds.)

Biology and Conservation of Horseshoe Crabs, edited through Dr. John T. Tanacredi, Dr. Mark L. Botton, and Dr. David R. Smith, deals court cases from a ground-breaking 2007 overseas symposium at Dowling collage at the technology and conservation of the horseshoe crab. Horseshoe crabs are famous as "living fossils" with a geological heritage masking 1000's of thousands of years and an ancestry achieving again 455 million years to your doorstep of the Cambrian. even so sturdiness, every one species now faces universal and transforming into threats. lack of crucial spawning habitat as a result of erosion and coastline improvement, coastal toxins, and overfishing all threaten horseshoe crab populations. Symposium individuals from around the globe amassed to percentage wisdom, current study effects, and establish conservation demanding situations dealing with horseshoe crabs. This shared overseas wisdom and adventure is gifted the following as a starting in our collective efforts to preserve the world’s horseshoe crab species. during the ebook, the reader will locate result of new reports, and authoritative stories at the technology and conservation of all 4 of the world’s horseshoe crab species.

About the editors:

Dr. John T. Tanacredi is Chair and Professor of Earth and Marine Sciences at Dowling collage. he's a examine affiliate within the Invertebrate Zoology division on the American Museum of usual heritage.

Dr. Mark L. Botton is a Professor of Biology at Fordham collage.

Dr. David R. Smith is a study organic Statistician for the U.S. Geological Survey.

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Additional resources for Biology and Conservation of Horseshoe Crabs

Sample text

Limits on the Global Distribution of Horseshoe Crabs (Limulacea) 13 Fig. 7 Populations of Limulus polyphemus are morphometrically discrete (Shuster 1955, 1979). Graphic representation of the prosomal widths of adults in millimeters (after technique of Hubbs and Hubbs 1953): range in prosomal width (horizontal line); mean (vertical spike), one standard deviation (wide bar); two standard errors of the mean (white portion of each bar); the female dimensions are greater than those of the males. SRB = Sarasota Bay, Florida (278300 N); OKB = Ochlockonee Bay, FL; SHS = St.

But when did horseshoe crabs begin to use the beaches? It is tempting to surmise that beach egg-laying was less likely until the opisthosomal segments fused and a deep vault was formed during the Devonian some 380 million or so years ago. This created a chamber in which the book gills could retain moisture for a few hours. However, small-sized species such as Paleolimulus and Euproops probably laid their eggs in superficial surface materials such as matted plant debris. Probably it was not until the larger-sized crabs evolved that beaches came into their own as incubators.

In: Tanacredi JT (ed) Limulus in the Limelight. Kluwer Academic/ Plenum, New York, pp 17–40 Shuster CN Jr, Anderson LI (2003) A history of skeletal structure: clues to relationships among species. In: Shuster CN Jr, Barlow RB, Brockman HJ (eds) The American Horseshoe Crab. Harvard University Press, Cambridge, pp 154–188 Sokoloff A (1978) Observations on populations of the horseshoe crab Limulus (=Xiphosura) polyphemus. Res Popul Ecol 19:222–236 Spraker H, Austin HM (1997) Diel feeding periodicity of Atlantic silverside, Menidia menidia, in the York River, Chesapeake Bay, Virginia.

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