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Journal

The University of Southern Mississippi

2001

Articles 1 - 10 of 10

Full-Text Articles in Life Sciences

The Stomatopod Alachosquilla Floridensis (Manning, 1962) (Crustacea, Stomatopoda, Nannosquillidae) Reported From Guana Island, British Virgin Islands, With Observations On Color, Joel W. Martin, Todd L. Zimmerman Jan 2001

The Stomatopod Alachosquilla Floridensis (Manning, 1962) (Crustacea, Stomatopoda, Nannosquillidae) Reported From Guana Island, British Virgin Islands, With Observations On Color, Joel W. Martin, Todd L. Zimmerman

Gulf and Caribbean Research

Although color pattern can vary among and within species of the Crustacea, it can also be a conservative feature that can be very helpful in field identifications. This is often the case in the Crustacea Decapoda, where sibling species can be detected by subtle differences in color (e.g., Williams and Felder 1989, Zimmerman and Felder 1991, Knowlton and Mills 1992). Stomatopods are among the most colorful crustaceans when living. Many species show a great deal of variability (Manning 1969, Camp 1973), and knowledge of this coloration is often key to their identification in the field and in the lab (Schotte …

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Utilization Of Saltmarsh Shorelines By Newly Settled Sciaenids In A Texas Estuary, Bert W. Geary, Jay R. Rooker, James W. Webb Jan 2001

Utilization Of Saltmarsh Shorelines By Newly Settled Sciaenids In A Texas Estuary, Bert W. Geary, Jay R. Rooker, James W. Webb

Gulf and Caribbean Research

Post-settlement patterns of habitat use along saltmarsh shorelines of Galveston Bay, Texas were examined for three sciaenids; spotted seatrout (Cynoscion nebulosus), red drum (Sciaenops ocellatus), and Atlantic croaker (Micropogonias undulatus). Collections were made summer through fall of 1997 and 1998 using a 1.5-m beam trawl hand-towed along the outside edge of salt marshes. Sciaenids were collected from tidal pass, bay, and remote tidal creek areas to assess large-scale (bay-wide) patterns of distribution and abundance. Cynoscion nebulosus were smaller and most numerous at bay stations, with densities peaking in June. Conversely, S. ocellatus were collected …

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The Chaetognatha Of The Southwestern Gulf Of Mexico During April-May, 1986, Silvia Mille-Pagaza, Jorge Carrillo-Laguna Jan 2001

The Chaetognatha Of The Southwestern Gulf Of Mexico During April-May, 1986, Silvia Mille-Pagaza, Jorge Carrillo-Laguna

Gulf and Caribbean Research

An analysis of the distribution and abundance of Chaetognatha species from the Gulf of Mexico during April–May 1986 is presented. Zooplankton samples were collected at 43 stations from the southwestern and eastern regions of Mexico’s Exclusive Economic Zone in the Gulf of Mexico. Species richness and abundance were higher in the southwestern stations located at the platform slope. The rank of Importance Value (IV) shows 3 groups of species; the first group included Flaccisagitta enflata, Mesosagitta minima, Serratosagitta serratodentata, Krohnitta subtilis, Pterosagitta draco, Sagitta bipunctata, and Krohnitta pacifica which were the most widely distributed …

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Tanaidacea (Crustacea: Peracardia) Of The Gulf Of Mexico. Ix. Geographical Occurrence Of Apseudes Olimpiae Gutu, 1986 With A Review Of Previous Records For The Genus Apseudes In The Gulf, Tom Hansknecht, Richard W. Heard Jan 2001

Tanaidacea (Crustacea: Peracardia) Of The Gulf Of Mexico. Ix. Geographical Occurrence Of Apseudes Olimpiae Gutu, 1986 With A Review Of Previous Records For The Genus Apseudes In The Gulf, Tom Hansknecht, Richard W. Heard

Gulf and Caribbean Research

Examination of tanaidacean specimens collected from shelf waters of the eastern Gulf of Mexico (Gulf) revealed the presence of the apseudomorph Apseudes olimpiaeGutu, 1986, whose type locality was unknown, but suspected to be Bermuda. It is now determined that the type material actually came from the northeastern Gulf. Although the specific station locality information for the type material has been lost; records indicate that specimens from the Gulf were sent to Romania for study by M. Băcescu and apparently became mixed with material from Bermuda. Based on additional material from the present study, new locality records are established for …

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Effects Of Salinity On Development In The Ghost Shrimp Callichirus Islagrande And Two Populations Of C. Major (Crustacea: Decapoda: Thalassinidea), K.M. Strasser, D.L. Felder Jan 2001

Effects Of Salinity On Development In The Ghost Shrimp Callichirus Islagrande And Two Populations Of C. Major (Crustacea: Decapoda: Thalassinidea), K.M. Strasser, D.L. Felder

Gulf and Caribbean Research

Salinity (S) was abruptly decreased from 35‰ to 25‰ at either the 4th zoeal (ZIV) or decapodid stage (D) in Callichirus islagrande (Schmitt) and 2 populations of C. major (Say). Other larvae were maintained at stable 35‰ or 25‰ S throughout development. In C. islagrande, duration of ZIV did not vary among the stable salinities. However, a decrease of salinity at ZIV reduced the duration of this stage, suggesting that the S decrease could be a possible cue for acceleration of larval development. In the Gulf population of C. major duration of ZIV was significantly longer at stable 35‰ …

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Growth Of Captive Juvenile Tripletail Lobotes Surinamensis, James S. Franks, John T. Ogle, J. Read Hendon, Donald N. Barnes, L. Casey Nicholson Jan 2001

Growth Of Captive Juvenile Tripletail Lobotes Surinamensis, James S. Franks, John T. Ogle, J. Read Hendon, Donald N. Barnes, L. Casey Nicholson

Gulf and Caribbean Research

Early-juvenile tripletail Lobotes surinamensis (n = 27; range 45–115 mm TL, 0 = 73.0 mm; range 3.2–34.7 g TW, 0 = 12.9 g) captured in pelagic Sargassum algae off coastal Mississippi in mid-July 1999 were reared in a recirculating seawater system for 210 days. Fish were maintained on a natural light-dark cycle and fed to satiation 3 times per day. Water temperature ranged from 25.2° to 29.0° C and salinity was 28.0‰. All fish were measured for length and weight on days 1, 60, 135 and 210 of the study. Between these dates, mean daily TL growth rates were 2.2 …

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Gulf Estuarine Research Society Fall 2000 Meeting Abstracts Jan 2001

Gulf Estuarine Research Society Fall 2000 Meeting Abstracts

Gulf and Caribbean Research

The Fall 2000 meeting of the Gulf Estuarine Research Society (GERS) was held at the Holiday Inn in Hammond, Louisiana on Monday and Tuesday, November 13 and 14, 2000. Local arrangements were organized by Denise J. Reed (University of New Orleans) and Robert W. Hastings (Southeastern Louisiana University) with significant support from Carolyn Woosley and Dr. Gary P. Shaffer. The Scientific Program was organized by Mark S. Peterson (The University of Southern Mississippi).

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Accurate 3-D Morphological Measurement Using A Structured-Light Range Sensor, Robert L. Cromwell, Stuart G. Poss Jan 2001

Accurate 3-D Morphological Measurement Using A Structured-Light Range Sensor, Robert L. Cromwell, Stuart G. Poss

Gulf and Caribbean Research

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 << 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.

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Gastropod Larvae And Zooplankton In Reef-Related Areas Of The Western Caribbean Sea, Alberto De Jesus-Navarrete, Jose Juan Oliva-Rivera Jan 2001

Gastropod Larvae And Zooplankton In Reef-Related Areas Of The Western Caribbean Sea, Alberto De Jesus-Navarrete, Jose Juan Oliva-Rivera

Gulf and Caribbean Research

In order to estimate the composition, distribution and abundance of zooplankton in 3 areas off the western Caribbean, samples were collected in 15 stations at South Coast and Chinchorro Bank, Mexico, and Hol-Chan Belize, from April to December 1996. Duplicate samples (2.5 m3) were collected bimonthly using a submersible pump. The pumped water was filtered through a 202 μm mesh net yielding a total of 20 zooplankton groups. Chinchorro Bank had 19 groups, South Coast had 15 groups, and Hol-Chan had 14 groups. The most abundant groups were copepods (43.1%), fish eggs (29.0%), foraminifera (12.0%), decapod larvae (5.7%) …

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Morphology Of The First Zoeal Stage Of Platypodiella Spectabilis (Herbst, 1794) (Decapoda, Brachyura, Xanthidae) Obtained In The Laboratory, Adilson Fransozo, Maria Lucia Negreiros-Fransozo, Joel W. Martin, Sandra E. Trautwein Jan 2001

Morphology Of The First Zoeal Stage Of Platypodiella Spectabilis (Herbst, 1794) (Decapoda, Brachyura, Xanthidae) Obtained In The Laboratory, Adilson Fransozo, Maria Lucia Negreiros-Fransozo, Joel W. Martin, Sandra E. Trautwein

Gulf and Caribbean Research

Ovigerous females of the xanthid crab Platypodiella spectabilis (Herbst, 1794) were obtained from 2 widely separated localities: the Ubatuba coast (Félix Beach, São Paulo) of Brazil and Guana Island in the British Virgin Islands (BVI). First stage zoea larvae were obtained from females at both locations. Those from Brazil are described and illustrated. The first zoea bears dorsal, rostral, and lateral carapace spines, plus a well-developed and spinose antennal protopod that bears a greatly reduced exopod with 2 minute setae. This antennal morphology, along with other characters, places the species among the “Group I” xanthid zoeas of Rice (1980) and …

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