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Gulf of Mexico

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Articles 121 - 150 of 171

Full-Text Articles in Marine Biology

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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Form Ia Rbcl Transcripts Associated With A Low Salinity/High Chlorophyll Plume ('Green River') In The Eastern Gulf Of Mexico, John H. Paul, Albin Alfreider, Jordan B. Kang, Roger A. Stokes, Dale Griffin, Lisa Campbell, Erla Ornolfsdottir Jun 2000

Form Ia Rbcl Transcripts Associated With A Low Salinity/High Chlorophyll Plume ('Green River') In The Eastern Gulf Of Mexico, John H. Paul, Albin Alfreider, Jordan B. Kang, Roger A. Stokes, Dale Griffin, Lisa Campbell, Erla Ornolfsdottir

Marine Science Faculty Publications

Coastal plumes of low salinity water that extend hundreds of kilometers offshore into oligotrophic waters are often found in the Gulf of Mexico. To characterize one such feature, a series of photoautotrophic activity and biomass parameters were measured at 2 stations in the eastern Gulf of Mexico, including pigments by high performance liquid chromatography (HPLC), autotrophic picoplankton abundance by flow cytometry, photoautotrophic 14C-HCO3- fixation, and Ribulose-1,5-diphosphate carboxylase large subunit gene (rbcL) transcriptional activity. One sampling site (Stn 4) was in a 15 m deep, low salinity (29.8 ppt) plume 242 km west of Tampa Bay. …

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Oceanic And Neritic Ichthyoplankton At The Edge Of The Continental Shelf In The Southern Gulf Of Mexico, Cesar Flores-Coto, Fernando Flores-Hernandez, Faustino Zavala-Garcia, Virgilio Arenas-Fuentes, Maria Adela Monreal-Gomez, David Alberto Salas-De-Leon Jan 2000

Oceanic And Neritic Ichthyoplankton At The Edge Of The Continental Shelf In The Southern Gulf Of Mexico, Cesar Flores-Coto, Fernando Flores-Hernandez, Faustino Zavala-Garcia, Virgilio Arenas-Fuentes, Maria Adela Monreal-Gomez, David Alberto Salas-De-Leon

Gulf and Caribbean Research

Oceanic and neritic ichthyoplankton were examined at a single sampling site at the edge of the continental shelf in the southern Gulf of Mexico. Double oblique tows were made with a 60 cm Bongo net fitted with 505 µm mesh netting. Collections were taken every 2 hours over a 24 h period during spring, summer and fall of 1992. Fish larvae were described as either oceanic or neritic depending upon adult lifestage habitat. The larvae of 59 taxa were collected in spring (50 oceanic, 9 neritic), 53 in summer (26 oceanic, 27 neritic) and 55 in fall (22 oceanic, 33 …

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Fecundity Of Litopenaeus Setiferus, Farfantepenaeus Aztecus And F. Duorarum, In The Southwestern Gulf Of Mexico, Martin Perez Velazquez, Adolfo Gracia Jan 2000

Fecundity Of Litopenaeus Setiferus, Farfantepenaeus Aztecus And F. Duorarum, In The Southwestern Gulf Of Mexico, Martin Perez Velazquez, Adolfo Gracia

Gulf and Caribbean Research

Fecundity of white shrimp, Litopenaeus setiferus, brown shrimp, Farfantepenaeus aztecus, and pink shrimp F. duorarum and relationships to gonad weights and total and carapace length were estimated. Ovigerous females were collected in the southern Gulf of Mexico in February, May, August and November 1993. Fecundity was estimated by means of a gravimetric method. The equations relating fecundity to total weight and fecundity to gonad weight were linear in the 3 species. However, an exponential relationship was found between fecundity and carapace length in L. setiferus and F. aztecus. Of the relationships examined, gonad weight was considered a …

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The South American Neritic Copepod Ctenocalanus Heronae Vega-Pérez And Bowman (Calanoida) In The Gulf Of Mexico, With Comments On The Taxonomy Of The Genus, E. Suarez-Morales, A. Leon-Oropeza Jan 2000

The South American Neritic Copepod Ctenocalanus Heronae Vega-Pérez And Bowman (Calanoida) In The Gulf Of Mexico, With Comments On The Taxonomy Of The Genus, E. Suarez-Morales, A. Leon-Oropeza

Gulf and Caribbean Research

A single adult female specimen of the calanoid copepod Ctenocalanus heronaeVega-Pérez and Bowman was collected during a zooplankton survey carried out in February 1997 in Campeche Sound, the central-southeastern portion of the Gulf of Mexico. The taxonomy of the genus Ctenocalanus Giesbrecht is still unclear. Characters used to separate the species have been considered rather subtle. In this paper the taxonomic illustrations of the specimen collected are accompanied by a revision of the taxonomic features commonly used to identify the species. New, previously overlooked characters such as the cephalosome/urosome ratio, the shape of the 5th legs and particularly the …

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Midwater Fishes And Shrimps As Competitors And Resource Partitioning In Low Latitude Oligotrophic Ecosystems, T. L. Hopkins, Tracey Sutton Apr 1998

Midwater Fishes And Shrimps As Competitors And Resource Partitioning In Low Latitude Oligotrophic Ecosystems, T. L. Hopkins, Tracey Sutton

Marine & Environmental Sciences Faculty Articles

Oligotrophic tropical-subtropical oceanic regimes constitute the largest and most ancient ecosystem on earth, with these enormous areas being characterized by high faunal diversity. The stability and age of the ecosystem have enabled the evolution of many similar species niches where there is considerable overlap in niche parameters such as food and space, resulting in high species packing, especially in the epi- and mesopelagic zones. Competition for limited resources undoubtedly exists and has been described by MacArthur (1972; Geographical ecology, Harper and Row, New York) as diffuse competition where each species is impacted by many other species sharing the environment. Most …

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Midwater Fishes And Shrimps As Competitors And Resource Partitioning In Low Latitude Oligotrophic Ecosystems, Thomas L. Hopkins, Tracey T. Sutton Apr 1998

Midwater Fishes And Shrimps As Competitors And Resource Partitioning In Low Latitude Oligotrophic Ecosystems, Thomas L. Hopkins, Tracey T. Sutton

Marine Science Faculty Publications

Oligotrophic tropical-subtropical oceanic regimes constitute the largest and most ancient ecosystem on earth, with these enormous areas being characterized by high faunal diversity. The stability and age of the ecosystem have enabled the evolution of many similar species niches where there is considerable overlap in niche parameters such as food and space, resulting in high species packing, especially in the epi-and mesopelagic zones. Competition for limited resources undoubtedly exists and has been described by MacArthur (1972; Geographical ecology, Harper and Row, New York) as diffuse competition where each species is impacted by many other species sharing the environment. Most studies …

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Trophic Diversity Of A Mesopelagic Fish Community., Tracey Sutton, Thomas L. Hopkins, Thomas M. Lancraft Apr 1998

Trophic Diversity Of A Mesopelagic Fish Community., Tracey Sutton, Thomas L. Hopkins, Thomas M. Lancraft

Marine & Environmental Sciences Faculty Proceedings, Presentations, Speeches, Lectures

To understand the character of prey partitioning in a low latitude oligotrophic region, a composite picture of the trophic structure of a mesopelagic fish community was made from the eastern Gulf of Mexico. Two hundred and twenty three species were collected in the area of which I61 species were abundant enough for analyses. Fifteen major categories of prey biomass are identified for diet analyses: viz. copepods, ostracods, amphipods, euphausiids, decapods, larvaceans, salps, coelenterates (primarily siphonophores), unidentified gelatinous prey, polychaetes, gastropods, cephalopods, chaetognaths, fish, other food. Prey partitioning is minimal across major prey categories as the vast majority of mesopelagic fishes …

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Prophage Induction Of Indigenous Marine Lysogenic Bacteria By Environmental Pollutants, Pamela K. Cochran, Christine A. Kellogg, John H. Paul Apr 1998

Prophage Induction Of Indigenous Marine Lysogenic Bacteria By Environmental Pollutants, Pamela K. Cochran, Christine A. Kellogg, John H. Paul

Marine Science Faculty Publications

Lysogenic bacteria may be abundant components of bacterial assemblages in marine waters. The tremendous number of viruses found in estuarine and other eutrophic environments may be the result in part of induction of prophages. Mitomycin C is the inducing agent of choice for prophage induction; however this is not naturally found in the marine environment. We determined the capability of environmentally important pollutants to effect prophage induction in natural populations of marine bacteria. We investigated Aroclor 1248, a PCB mixture, bunker C fuel oil #6, and a pesticide mixture as inducing agents for natural bacterial communities from the Gulf of …

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Feeding Of Sciaenid (Pisces: Sciaenidae) Larvae In Two Coastal Lagoons Of The Gulf Of Mexico, Alberto Ocana-Luna, Marina Sanchez-Ramirez Jan 1998

Feeding Of Sciaenid (Pisces: Sciaenidae) Larvae In Two Coastal Lagoons Of The Gulf Of Mexico, Alberto Ocana-Luna, Marina Sanchez-Ramirez

Gulf and Caribbean Research

Stomach contents analyses showed that Leiostomus xanthurus (8.50-12.90 mm SL) had a wide trophic spectrum (15 food categories) with copepods and eggs of invertebrates as main components. In contrast, Micropogonias undulutus (6.65-12.20 mm SL) ingested only six food categories (copepods, eggs of invertebrates, crustacean nauplii, bamacle nauplii, amphipods and other crustaceans). There is an overlap of 73.2 to 83.0% in the diet of these two species. Bairdiella chrysoura (1.17-1.92 mm SL) fed primarily on juvenile pelecypods, crustacean nauplii, eggs of invertebrates, including gasteropods and copepods. Cynoscion nebulosus (1.50-2.42 mm SL) ingested juvenile pelecypods, copepods, crustacean nauplii, eggs of invertebrates and …

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An Illustrated Record And Range Extension Of Caligus Chelifer (Copepoda, Siphonostomatoida) In The Gulf Of Mexico, E. Suarez-Morales, I. H. Kim, I. Lopez-Salgado Jan 1998

An Illustrated Record And Range Extension Of Caligus Chelifer (Copepoda, Siphonostomatoida) In The Gulf Of Mexico, E. Suarez-Morales, I. H. Kim, I. Lopez-Salgado

Gulf and Caribbean Research

A male specimen of the copepod Caligus chelifer Wilson, 1905, was collected during a plankton survey carried out during February 1994 off the Mexican coasts of the eastern Gulf of Mexico (Tamaulipas state). This is the first record of this species in Mexican waters and south of the 25ºN in the Northwestern Atlantic. Taxonomic illustrations of the specimen are provided.

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Observations Of Sea Turtles And Other Marine Life At The Explosive Removal Of Offshore Oil And Gas Structures In The Gulf Of Mexico, Gregg R. Gitschlag, Bryan A. Herczeg, Theresa R. Barcak Jan 1997

Observations Of Sea Turtles And Other Marine Life At The Explosive Removal Of Offshore Oil And Gas Structures In The Gulf Of Mexico, Gregg R. Gitschlag, Bryan A. Herczeg, Theresa R. Barcak

Gulf and Caribbean Research

Observers monitored the explosive removal of oil and gas structures in the Gulf of Mexico to protect sea turtles and marine mammals from adverse impacts. More than 7,000 monitoring hours at 131 structure removals were conducted during 1993. Sixteen individual sea turtles were observed including 6 loggerheads, 1 Kemp's ridley, 1 green, and 8 unidentified sea turtles. Aerial surveys were approximately ten times more effective in observing sea turtles than day or night surface surveys.

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Benthic-Pelagic Coupling In Northern Gulf Of Mexico Estuaries: Do Benthos Feed Directly On Phytoplankton?, Gary R. Gaston, Carol M. Cleveland, Steven S. Brown, Chet F. Rakocinski Jan 1997

Benthic-Pelagic Coupling In Northern Gulf Of Mexico Estuaries: Do Benthos Feed Directly On Phytoplankton?, Gary R. Gaston, Carol M. Cleveland, Steven S. Brown, Chet F. Rakocinski

Gulf and Caribbean Research

Few of the dominant benthic taxa of the northern Gulf of Mexico feed directly on phytoplankton. Rather, most of them feed on near-bottom seston and detritus. This is in contrast to models for Chesapeake Bay and San Francisco Bay. We found that detritivores represented over 80% of the macrobenthic organisms and over 90% of the biomass in Gulf of Mexico estuaries. The paucity of benthos that consumed phytoplankton led us to hypothesize that macrobenthos in Gulf of Mexico estuaries had less effect on plankton communities than was documented in U.S. east coast and west coast estuaries, where benthic communities consumed …

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Northern Record For The Zooxanthellate Scleractinian Coral Siderastrea Siderea (Ellis And Solander) From The Gulf Of Mexico, William W. Schroeder, Thomas S. Hopkins Jan 1997

Northern Record For The Zooxanthellate Scleractinian Coral Siderastrea Siderea (Ellis And Solander) From The Gulf Of Mexico, William W. Schroeder, Thomas S. Hopkins

Gulf and Caribbean Research

We report a northward range extension of the zooxanthellate scleractinian coral Siderastrea siderea (Ellis and Solander) in the Gulf of Mexico. Several small, living colonies of S. siderea have been obtained in dredge samples from a site located at 29º 55.5' N, 087º 28.4' W in the northeastern Gulf of Mexico. Prior to these collections the northernmost occurrence of S. siderea in the Gulf of Mexico was reported as 27º 54.5' N, 093º 35.8' W, on the East Flower Garden Bank, in the western Gulf of Mexico. In the eastern Gulf of Mexico, S. siderea is not reported occurring on …

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Gonadal Maturation In The Cobia, Rachycentron Canadum, From The Northcentral Gulf Of Mexico, Jeffrey M. Lotz, Robin M. Overstreet, James S. Franks Jan 1996

Gonadal Maturation In The Cobia, Rachycentron Canadum, From The Northcentral Gulf Of Mexico, Jeffrey M. Lotz, Robin M. Overstreet, James S. Franks

Gulf and Caribbean Research

Gonadal maturation of cobia, Rachycentron canadum, was evaluated by examining 508 specimens from its recreational fishery. Specimens were collected off southeast Louisiana to northwest Florida by hook-and-line during February through October 1987-1991. Fork lengths (FL) of these fish ranged from 580-1,530 mm, with corresponding weights of 2.0-43.5 kg. The female:male ratio was 1:0.37. Using a combination of oocyte size frequency and histological assessment of many of the fish, we determined that females were ripe from May through September, with atretic oocytes occurring in some fish from July through October. Degenerating hydrated oocytes in July and October and the presence …

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Food Of Cobia, Rachycentron Canadum, From The Northcentral Gulf Of Mexico, Gabriele H. Meyer, James S. Franks Jan 1996

Food Of Cobia, Rachycentron Canadum, From The Northcentral Gulf Of Mexico, Gabriele H. Meyer, James S. Franks

Gulf and Caribbean Research

The stomach contents of 403 cobia, Rachycentron canadum, caught in the northcentral Gulf of Mexico recreational fishery from April through October of 1987-1990 were examined. Cobia ranged from 373-1,530 mm in fork length. Of the 403 stomachs, 287 (71.2%) contained at least one identifiable prey taxon. Crustaceans, consisting primarily of portunid crabs, were the predominant food. Crustaceans occurred in 79.1% of the stomachs and comprised 77.6% of the total number of identifiable prey. The second most important prey category was fish which was dominated by hardhead catfish, Arius felis, and eels. Fish occurred in 58.5% of the stomachs …

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Distribution Of Loxothylacus Texanus (Cirripedia: Rhizocephala) Parasitizing Crabs Of The Genus Callinectes In The Southwestern Gulf Of Mexico, Fernando Alvarez, Jorge Calderon Jan 1996

Distribution Of Loxothylacus Texanus (Cirripedia: Rhizocephala) Parasitizing Crabs Of The Genus Callinectes In The Southwestern Gulf Of Mexico, Fernando Alvarez, Jorge Calderon

Gulf and Caribbean Research

A preliminary study on the interaction between the parasitic barnacle Loxothylacus texanus and two of its host species, the blue crab Callinectes sapidus and the dark blue crab C. rathbunae, in the Gulf of Mexico is presented. Data were obtained from 923 crabs, 162 C. sapidus and 761 C. rathbunae, deposited in the Colección de Crustáceos, Instituto de Biologia, Universidad Nacional Autónoma de México (UNAM), that were collected in 14 coastal lagoons and sites along the Mexican coast of the Gulf of Mexico. The distribution of L. texanus parasitizing each one of the host species, mean host size …

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Aricidea (Allia) Bryani, A New Species Of Polychaete (Polychaeta: Paraonidae) From The Northern Gulf Of Mexico, Gary R. Gaston, Jerry A. Mclelland Jan 1996

Aricidea (Allia) Bryani, A New Species Of Polychaete (Polychaeta: Paraonidae) From The Northern Gulf Of Mexico, Gary R. Gaston, Jerry A. Mclelland

Gulf and Caribbean Research

Aricidea bryani, a new species of polychaete (Polychaeta: Paraonidae) belonging to the subgenus Allia Strelzov 1973, is described from shallow subtidal sediments along the northern shore of Mississippi Sound, an estuary of the northern Gulf of Mexico. The new species is distinguished from other members of the subgenus by the presence of tuberculate neuropodial lobes in the anterior 15-20 setigers, a cirriform median antenna that extends posteriorly to setiger three, and by modified neuropodial setae that are abruptly tapered at mid-length, but lack terminal aristae.

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Pseudione Overstreeti, New Species (Isopoda: Epicaridea: Bopyridae), A Parasite Of Callichirus Islagrande (Decapoda: Anomura: Callianassidae) From The Gulf Of Mexico, Daniel L. Adkison, Richard W. Heard Jan 1995

Pseudione Overstreeti, New Species (Isopoda: Epicaridea: Bopyridae), A Parasite Of Callichirus Islagrande (Decapoda: Anomura: Callianassidae) From The Gulf Of Mexico, Daniel L. Adkison, Richard W. Heard

Gulf and Caribbean Research

Pseudione overstreeti, new species, is a common bopyrid that infests the branchial chamber of the beach ghost shrimp, Callichirus islagrande, occurring along beaches of the Gulf of Mexico from Cape San Blas, Florida to Paraiso, Tabasco, Mexico. Like other members of the genus Pseudione that infest callianassid shrimps, the female of P. overstreeti is characterized by biramous terminal appendages which result from the combination of uniramous uropods with the closely associated lateral plates of pleomere 6. From the other members of the genus Pseudione occurring on callianassid hosts, P. overstreeti is distinguished by the distinctive development of the …

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A Pugheaded Cobia (Rachycentron Canadum) From The Northcentral Gulf Of Mexico, James S. Franks Jan 1995

A Pugheaded Cobia (Rachycentron Canadum) From The Northcentral Gulf Of Mexico, James S. Franks

Gulf and Caribbean Research

A pugheaded cobia (Rachycentron canadum) captured in the northcentral Gulf of Mexico represents the first record of pugheadedness in cobia. The specimen, a 4-year-old gravid female, exhibited considerable distortion of the premaxillary and maxillary bones, with the length of the snout 46% shorter than that of a normal cobia of the same length. The anomaly had no apparent effect on feeding, since the stomach contained a substantial amount of food, and the fish was the same length expected of a normal 4-year-old cobia.

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A Note On Bycatch Associated With Deepwater Trapping Of Chaceon In The Northcentral Gulf Of Mexico, Harriet Perry, Richard Waller, Christine Trigg, James Mcbee, Robert Erdman, Norman Blake Jan 1995

A Note On Bycatch Associated With Deepwater Trapping Of Chaceon In The Northcentral Gulf Of Mexico, Harriet Perry, Richard Waller, Christine Trigg, James Mcbee, Robert Erdman, Norman Blake

Gulf and Caribbean Research

Bycatch associated with deepwater trapping of Chaceon is reported for outer shelf and slope waters of the northcentral Gulf of Mexico. Bycatch was dominated by the isopod, Bathynomus giganteus. Other crustacean megafauna consisted of the majid crab, Rochinia crassa, and the portunid crabs, Benthochascon schmitti and Bathynectes longispina. Finfish bycatch included hagfish, Eptatretus springeri, deepwater shark, Centrophorus uyato and hake, Urophycis cirrata.

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Estimates Of Harvest Potential And Distribution Of The Deep Sea Red Crab, Chaceon Quinquedens, In The North Central Gulf Of Mexico, Richard Waller, Harriet Perry, Christine Trigg, James Mcbee, Robert Erdman, Norman Blake Jan 1995

Estimates Of Harvest Potential And Distribution Of The Deep Sea Red Crab, Chaceon Quinquedens, In The North Central Gulf Of Mexico, Richard Waller, Harriet Perry, Christine Trigg, James Mcbee, Robert Erdman, Norman Blake

Gulf and Caribbean Research

Harvest potential, relative abundance, and geographic and bathymetric distribution are discussed for the red crab, Chaceon quinquedens, in the northcentral Gulf of Mexico. Harvest potential is expressed as the number of trapable crabs present on fishing grounds defined as depths ranging from 677 m to 1043 m between 87.5o and 88.5oW longitude. Using various estimates of the effective fishing area (EFA) of a trap, the number of trapable red crabs on the fishing grounds ranged from 3.7 x 106 to 10.7 x 106. Estimatesofcrabnumberssuggest there is a potential for commercial harvest in the …

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Survey And Reconnaissance Of Sea Turtles In The Northern Gulf Of Mexico, Larry Ogren Jan 1989

Survey And Reconnaissance Of Sea Turtles In The Northern Gulf Of Mexico, Larry Ogren

United States Department of Commerce: Staff Publications

This is a report on the results of an aerial survey of nesting beaches conducted during the period from May 16, 1977 to August 11, 1977. The area covered included the barrier beaches and offshore islands from the Florida-Alabama state line to the Rio Grande, Texas. Additional historical information is provided in order to compare current nesting activity with previous years as well as anecdotal observations on the occurrence of sea turtles in this region.

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Tanaidacea (Crustacea: Peracardia) Of The Gulf Of Mexico. Viii., Barbara J. Viskup, Richard W. Heard Jan 1989

Tanaidacea (Crustacea: Peracardia) Of The Gulf Of Mexico. Viii., Barbara J. Viskup, Richard W. Heard

Gulf and Caribbean Research

Pseudosphyrapus siegi, n. sp. is described from benthic samples collected in deep water (595-2400 m) from the northern Gulf of Mexico. Of the five currently recognized species of Pseudosphyrapus Cup, 1980, P. siegi is most closely related to P. dispar (Lang, 1968), a southwestem Pacific cognate and only other member of the genus having a squama on antenna 2. Pseudosphyrapus siegi is distinguished from P. dispar by: (1) a more triangular, but less acute, rostrum (2) the presence of two 4-pronged spines on the second maxilla (homologous spines on P. dispar are 3-pronged), and (3) the absence of a …

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Tanaidacea (Crustacea: Peracardia) Of The Gulf Of Mexico. Vii. Atlantapseudes Lindae, N. Sp. (Apseudidae) From The Continental Slope Of The Northern Gulf Of Mexico, Gabriele H. Meyer, Richard W. Heard Jan 1989

Tanaidacea (Crustacea: Peracardia) Of The Gulf Of Mexico. Vii. Atlantapseudes Lindae, N. Sp. (Apseudidae) From The Continental Slope Of The Northern Gulf Of Mexico, Gabriele H. Meyer, Richard W. Heard

Gulf and Caribbean Research

During 1983 through 1985, 53 specimens of Atlantapseudes lindae, new species, were collected in box core samples taken on the continental slope in the northern Gulf of Mexico. Atlantapseudes lindae can be distinguished from the only other member of the genus, A. nigrichela Băcescu, 1978 by several characters, including the length of the squama of antenna 2, which is no longer than the third peduncular segment, and the absence of anterolateral spines on pereonites 1-2 of females and 1-6 on males. The diagnosis for genus Atlantapseudes Băcescu, 1978 is amended to include the presence of sexually dimorphic chelae and …

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Tanaidacea (Crustacea: Peracardia) Of The Gulf Of Mexico. Vi. On The Genus Mesotanais Dollfus, 1897 With Descriptions Of Two New Species, M. Longisetosus And M. Vadicola, Jurgen Sieg, Richard W. Heard Jan 1989

Tanaidacea (Crustacea: Peracardia) Of The Gulf Of Mexico. Vi. On The Genus Mesotanais Dollfus, 1897 With Descriptions Of Two New Species, M. Longisetosus And M. Vadicola, Jurgen Sieg, Richard W. Heard

Gulf and Caribbean Research

Two new species of tanaidaceans belonging to the family Leptocheliidae were collected from the continental shelves and slopes of the eastem and Gulf coasts of the United States. Both of these species are assigned to the poorly known genus Mesotanais Dollfus, 1897. Mesotanais is unique within the Leptocheliidae because its members lack eyes. The second supposedly important generic character, uniramous uropods, reported in the original description is considered to be a misdiagnosis. The assumption of this error is supported by the rediscovery of the type-species, Mesotanais dubius Dollfus, 1897 (Sieg and Bird, in press). In the present study, the genus …

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Larval Distribution And Abundance Of Carangidae (Pisces), From The Southern Gulf Of Mexico, 1983-1984, Cesar Flores-Coto, Marina Sanchez-Ramirez Jan 1989

Larval Distribution And Abundance Of Carangidae (Pisces), From The Southern Gulf Of Mexico, 1983-1984, Cesar Flores-Coto, Marina Sanchez-Ramirez

Gulf and Caribbean Research

The larval distribution and abundance of several taxa of the carangids from the southem Gulf of Mexico are analyzed, based on data from four oceanographic cruises conducted between 1983 and 1984. The material was collected with a bongo net fished to maximum depths of 200 m. The species collected were Chloroscombrus chrysurus (54.2%), Decapterus punctatus (15.8%), Trachurus Iathami (11.8%), Selene setapinnis (6.1%), Selar crumenophthalmus (6.0), Caranx hipposllatus (0.9%), Caranx crysos (0.7%) and Selene sp. (0.3%). The higher frequency of occurrence and greater abundance of larvae of all species was found over the continental shelf, and in some cases, in the …

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Tanaidacea (Crustacea: Peracardia) Of The Gulf Of Mexico. Iv. On Nototanoides Trifurcatus Gen. Nov., Sp. Nov., With A Key To The Genera Of The Nototanaidae, Jurgen Sieg, Richard W. Heard Jan 1985

Tanaidacea (Crustacea: Peracardia) Of The Gulf Of Mexico. Iv. On Nototanoides Trifurcatus Gen. Nov., Sp. Nov., With A Key To The Genera Of The Nototanaidae, Jurgen Sieg, Richard W. Heard

Gulf and Caribbean Research

Nototanoides trifurcatus gen. nov., sp. nov. is described and illustrated from the Gulf of Mexico. Nototanoides differs from the other genera of the family by the male possessing a vestigial maxilliped. It most closely resembles the genera Nototanais and Androtanais. In addition to the differences of the maxillipeds the males of Nototanoides can be separated by the 4-segmented antenna 1 and the females are distinguished by the trifurcate spine on the second segment of the palp of the maxilliped. A key to known genera of the family Nototanaidae is presented.

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Notes On Barnacles (Cirripedia: Thoracica) From The Gulf Of Mexico, Stephen R. Gittings Jan 1985

Notes On Barnacles (Cirripedia: Thoracica) From The Gulf Of Mexico, Stephen R. Gittings

Gulf and Caribbean Research

Examination of several collections of barnacles from the northern and western Gulf of Mexico made over the last 30 years has improved our knowledge of the distributions of several taxa previously considered to be absent or rare in those regions. Conchoderma auritum (Linnaeus) and Heteralepas sp. aff. cornuta (Darwin) are recorded for the first time from the Gulf of Mexico. Conchoderma auritum, Conchoderma virgatum (Spengler), Heteralepas cornuta (Darwin), Balanus trigonus (Darwin), Balanus venustus Darwin, and Balanus amphitrite amphitrite Darwin have broad distributions outside the Gulf of Mexico. Tetraclita stalactifera stalactifera (Lamarck) is abundant in the intertidal zones of the …

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Distribution And Ecology Of The Synaphobranchidae Of The Gulf Of Mexico, Douglas M. Martin Jan 1984

Distribution And Ecology Of The Synaphobranchidae Of The Gulf Of Mexico, Douglas M. Martin

Gulf and Caribbean Research

Synaphobranchid eels of the Gulf of Mexico are an important part of the upper continental slope ichthyofauna, occurring most frequently between 500 and 1,500 m. Two of the four known genera (Histiobranchus and Diastobranchus) have not been reported from the Gulf. Synaphobranchidae tend to occur within a narrow range of temperatures compared to the North Atlantic synaphobranchid eels. However, distribution of these eels in the deeper parts of the Gulf appears to be correlated more to change in depth than to temperature, salinity, or dissolved oxygen. The distribution at the shallower limits of their depth range appear to …

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