The Scientific Publications of Charles Eric Dawson (1948-1990)

By the time Charles Eric Dawson died on February 11, 1993, he had produced a total of 150 published papers. His contributions represent an important chapter in the ichthyological investigations of marine fishes. His work on fishes of the Americas and on the taxonomy of pipe fishes will long be remembered as two of his most significant and outstanding achievements. Although tribute to this Canadian-American Ichthyologist and longtime Senior Ichthyologist and curator of the ichthyological research collection at the Gulf Coast Research Laboratory is presented elsewhere (Overstreet and Poss, Copeia 1993(3):921-925), it is appropriate that the extensive bibliography of one of GCRL\u27s most productive scientists is compiled and made available to other researchers who will follow in his footsteps. These publications are listed chronologically

The Scientific Publications of Charles Eric Dawson (1948-1990)

By the time Charles Eric Dawson died on February 11, 1993, he had produced a total of 150 published papers. His contributions represent an important chapter in the ichthyological investigations of marine fishes. His work on fishes of the Americas and on the taxonomy of pipe fishes will long be remembered as two of his most significant and outstanding achievements. Although tribute to this Canadian-American Ichthyologist and longtime Senior Ichthyologist and curator of the ichthyological research collection at the Gulf Coast Research Laboratory is presented elsewhere (Overstreet and Poss, Copeia 1993(3):921-925), it is appropriate that the extensive bibliography of one of GCRL\u27s most productive scientists is compiled and made available to other researchers who will follow in his footsteps. These publications are listed chronologically

Accurate 3-D Morphological Measurement Using a Structured-Light Range Sensor

A single-plane structured light range-sensor was tested to establish its usefulness in acquiring 3-D measurements of fish skulls. Twenty-one distances among 22 landmark points for each of 12 neurocrania of the scorpaenid fish Neomerinthe hemingway were taken with digital calipers, with a video-based 2-D imaging system widely used in systematic studies, and with a single-plane structured-light range sensor of inexpensive and simple design. Measures taken by 3-D sensor are highly correlated with those obtained from caliper measurement (r = 0.9995, P \u3c\u3c 0.001 ), with a precision ranging from 0.08–0.43 mm. Like caliper-based measurements, they are less strongly correlated with measurements derived from projected video-imaging. Most skulls were scanned in just over 3 minutes each. Range maps, typically establishing the (x,y,z) coordinates of more than 75,000 points per scan, can be obtained in about 40–50 CPU seconds using software running on multiple platforms. Sensor data taken from different views can be merged to build a more complete 3-D reconstruction. System design, calibration, and use are discussed. By eliminating error due to perspective effects inherent in measuring from projected video images, such sensors hold considerable promise in quantifying biological shape in 3-D for comparative and functional studies

Charles Eric Chuck Dawson, 1922-1993 [in Memoriam]

Obituary of Charles Eric Chuck Dawson, 1922-1993, American marine ichthyologist

Eschmeyer nexus, a new genus and species of scorpaenid fish from Fiji

Volume: 96Start Page: 309End Page: 31

Redescription of the Indo-Pacific Scorpionfish Scorpaenopsis fowleri and Reallocation to the Genus Sebastapistes

The wide-ranging Indo-Pacific scorpionfish Scorpaenodes fowleri (Pietschmann), long placed in the genus Scorpaenopsis (largely because it lacks palatine teeth), is reclassified in the genus Sebastapistes. It is distinct from the species of Scorpaenopsis in several features: eye not extending above the dorsal profile of the head, large pores of the cephalic lateralis system, nasal pore above and adjacent to posterior nostril with a very small retrorse nasal spine (may be absent) on its upper edge, low ridgelike spines dorsally on the head, preocular spine usually embedded, sphenotic and postorbital spines absent or embedded; posterior lacrimal spine projecting slightly anteriorly, and a single spine posteriorly on the suborbital ridge with a pore-associated spine just below the ridge under the posterior third of the eye. Also significant is its very small size, the smallest of the Scorpaenidae (largest specimen, 37 mm SL; smallest mature female, 18 mm SL). The loss of palatine teeth appears to have occurred independently from the species of Scorpaenopsis. Sebastapistes fowleri is closest to S. strongia, the type species of the genus. In addition to having palatine teeth, S. strongia differs in the strongly retrorse posterior lacrimal spine and in having two spines on the suborbital ridge. The limits of Sebastapistes need reevaluation