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Physical And Biological Observations Of The Northern Rim Of The De Soto Canyon Made From A Research Submersible, Robert L. Shipp, Thomas S. Hopkins

Gulf of Mexico Science

During June 1978, the research submersible DIAPHUS completed 27 dives in the north central Gulf of Mexico. Fourteen of these were concentrated on and around the high relief, northern ledge or rim of the De Soto Canyon, located at depths of 50-60 m, and approximately 25 km S of Navarre, Florida.

The ledge is composed of limestone outcroppings. The invertebrate fauna is characterized as two principle assemblages, one associated with a sand-shell-coraline-algae slope and the other with a limestone block ledge. The ichthyofauna is dominated by deep water reef species, thirty of which are identified and their habitat and abundance …

Occurrence Of Vaucheria Adela, V. Lii And V. Nasuta (Xanthophyceae) In Brackish Marshes Of The Northern Gulf Of Mexico, Richard A. Pecora

Gulf of Mexico Science

No abstract provided.

Cymothoid Isopods Of Some Marine Fishes From The Northern Gulf Of Mexico, Ernest H. Williams Jr., Lucy B. Williams

Gulf of Mexico Science

No abstract provided.

A Method For Tagging Immature Blue Crabs (Callinectes Sapidus Rathbun), Marion T. Fannaly

Gulf of Mexico Science

No abstract provided.

Food Habits Of The Bay Anchovy, Anchoa Mitchilli, In Apalachicola Bay, Florida, Peter F. Sheridan

Gulf of Mexico Science

No abstract provided.

Hypothermal Mortality In Marine Fishes Of South-Central Florida, January, 1977, R. Grant Gilmore, Lewis H. Bullock, Frederick H. Berry

Gulf of Mexico Science

Comparable climatic conditions on both coasts of central Florida resulted in cold induced fish mortalities from 19 January to 13 February 1977. Lethal temperatures, the species killed and their relative numbers killed are compared for the Indian River lagoon, Tampa Bay and Sanibel Island estuarine systems. Fifty-six species were killed in the Indian River area, 36 in the Tampa Bay area, while 19 died at Sanibel Island. The higher species mortality in the Indian River lagoon may be attributed to local hydrological and topographical conditions-and a richer ichthyofauna. Cold-induced mortality was noted in both juvenile and adult tropical fishes. Some …

A New Species Of Poeciliid Fish Of The Genus Poecilia From Hispaniola, With Reinstatement And Redescription Of P. Dominicensis (Evermann And Clark), Luis R. Rivas

Gulf of Mexico Science

Exploration of the streams and lakes of Hispaniola and available collections of poeciliid fishes from that island are discussed, followed by the taxonomic history and generic status of the two species described. The genera Limia and Mollienesia were synonymized with Poecilia by Rosen and Bailey (1963) and the former Mollienesia dominicensis of Evermann and Clark (1906) became a junior homonym of Limia dominicensis of Valenciennes (1846). Rosen and Bailey, therefore, renamed M. dominicensis of Evermann and Clark as Poecilia montana. Because Mollienesia is herein retained as a synonym of Poecilia but Limia is reinstated as a valid genus, Poecilia …

First Records Of Blue Fish Larvae, Pomatomus Saltatrix, In The Gulf Of Mexico, Lyman E. Barger, L. Alan Collins, John H. Finucane

Gulf of Mexico Science

No abstract provided.

First North American Continental Record Of Gobionellus Pseudofasciatus (Pisces: Gobiidae), Philip A. Hastings

Gulf of Mexico Science

No abstract provided.

Spawning Of The Striped Mullet, Mugil Cephalus, In The Northwestern Gulf Of Mexico, John H. Finucane, L. Alan Collins, Lyman E. Barger

Gulf of Mexico Science

No abstract provided.

Feeding Habits And Food Of The Longspined Porgy, Stenotomus Caprinus Bean, Terry Henwood, Paul Johnson, Richard W. Heard

Gulf of Mexico Science

No abstract provided.

A New Species Of Tilefish (Pisces: Branchiostegidae) From The Bahama Islands, Frederick H. Berry

Gulf of Mexico Science

A new species of tilefish, Caulolatilus dooleyi (family Branchiostegidae), is described and distinguished from its nine congeners by a combination of external morphological characters. The description is based on three specimens caught bottom fishing in depths of 219 to 256 meters at three locations on the slopes of the Bahama Islands.

Benthic Invertebrates Inhabiting The Swash Zone Of Panama City Beach, Florida, Carl H. Saloman, Steven P. Naughton

Gulf of Mexico Science

No abstract provided.

Xanthochromism In Epinephelus Drummondhayi (Pisces: Serranidae) Caught Off North Carolina, Frank J. Schwartz

Gulf of Mexico Science

No abstract provided.

Effects Of A Lignosulfonate-Type Drilling Mud On Development Of Experimental Estuarine Macrobenthic Communities, M.E. Tagatz, J.M. Ivey, H.K. Lehman, J.L. Oglesby

Gulf of Mexico Science

Drilling mud, as used in exploratory drilling for oil offshore, affected the composition of estuarine communities that developed from planktonic larvae in aquaria containing sand and flowing estuarine water. Aquaria contained: sand only; a mixture (by volume) of 1 part mud and 10 parts sand; 1 part mud and 5 parts sand; or sand covered by 0.2 CIU mud. For all environments, annelids, mollusks, arthropods, and coelenterates were the numerically dominant phyla collected in a 1 mm mesh sieve after eift weeks exposure; a total of 1,025 animals, representing 45 species, was collected. Annelids and coelenterates were significantly fewer (a=0.05) …

First Gulf Of Mexico Coast Record Of Manayunkia Speciosa (Polychaete: Sabellidae), Walter T. Brehm

Gulf of Mexico Science

No abstract provided.

Biology And Ecology Of The Atlantic Stingray, Dasyatis Sabina (Pisces: Dasyatidae) In North Carolina And Georgia, Frank J. Schwartz, Michael D. Dahlberg

Gulf of Mexico Science

The seasonality, distribution, ecology, movements, catch per unit effort, breeding season, and length-weight relationships for the Atlantic stingray, Dasyatis sabina, trawled in North Carolina (1973 through 1976) and Georgia (1967 through 1969) are compared and discussed. Occurrences in relation to water temperature, salinity, and oxygen content are also reported and compared with previous literature. Dispelling popular belief, D. sabina throughout its range is a minor numerical component of the fish faunas studied.

Fishes Of The Nearshore Zone Of St. Andrew Bay, Florida And Adjacent Coast, Steven P. Naughton, Carl H. Saloman

Gulf of Mexico Science

The catch of fish by beach seine at 17 stations in the nearshore zone of St. Andrew Bay and adjacent coast during 1974 and 1975 was studied. A total of 99,579 individuals representing 88 species and 41 families was collected. The bay system and adjacent coast were divided into four areas based upon salinity, turbidity, amount of attached vegetation, and bottom type. The central bay (Area I) had the largest catches by weight (211.3 kg), number of individuals (52,322), standing crop (37.5 kg/ha) and species (61). This area was dominated by four species (Menidia beryllina, Lagodon rhomboides, …

Clapper Rail (Rallus Longirostris) Studies In Alabama, Dan C. Holliman

Gulf of Mexico Science

The habitat and distribution of the clapper rail Rallus longirostris saturatus in salt and brackish-mixed marshes of Alabama is described. A total of 4,490 hectares of habitat is mapped. Smaller units of vegetation are characterized in selected study areas. A comparison of these plant communities and call count data is shown for each locality. Concentrations of clapper rails generally occurred in those habitats with the higher percentage of Spartina alterniflora. A census technique utilizing taped calls is described. Trapping procedures are given for drift fences and funnel traps. Life history data are presented including an early date of April …

Ecology And Life History Of The Speckled Madtom, Noturus Leptacanthus (Ictaluridae), Kathleen E. Clark

Master's Theses

This research represents an effort to understand the life history, strategy, and ecological relationships of Noturus leptacanthus. In particular I have tried to compare the combination of low fecundity, large egg size, parental car , and marked sexual dimorphism in leptacanthus with the patterns of these parameters in other ictalurid species.

Marine Maladies? Worms, Germs, And Other Symbionts From The Northern Gulf Of Mexico, Robin M. Overstreet

GCRL Publications

No abstract provided.

Children's Book Festival, Karen Rowell, University Of Southern Mississippi

Fay B. Kaigler Children's Book Festival Programs

The eleventh annual Children's Book Festival held on the campus of The University of Southern Mississippi in Hattiesburg, Mississippi in 1978.

Amphilochidae (Crustacea: Amphipoda) From The Western Gulf Of Mexico And Caribbean Sea, L.D. Mckinney

Gulf and Caribbean Research

Two new species of Amphilochus, Amphilochus casahoya and Amphilochus delacaya, and one new species of Gitanopsis, Gitanopsis laguna, are described. Relationships within these genera, particularly Amphilochus, are difficult to determine. The new species, however, are similar to some eastern Pacific forms. One known species, Amphilochus neapolitanus is also reported as occurring in both the Gulf and Caribbean.

A Bibliography Of The Rhizocephala (Crustacea: Cirripedia), Adrian R. Lawler, Steven L. Shepard

Gulf and Caribbean Research

A bibliography of parasitic barnacles of the suborder Rhizocephala, including 490 titles, is presented. Scientific works from 1787 to present are listed.

Silica And Ash In The Salt Marsh Rush, Juncus Roemerianus, F.C. Lanning, Lionel N. Eleuterius

Gulf and Caribbean Research

Silica content of living rhizomes from the perennial salt marsh rush Juncus roemerianushad values of 0.34, 0.20, and 0.60% of dry weight in three morphologically distinct populations along the Mississippi coast and was directly related to available silica content of the soil (29.7, 17.0, 169.6 mg/100g soil, respectively). On the other hand, living leaves had about the same average silica content (0.93, 0.87, 0.9070 or dry weight). The silica content of living leaves varied from 0.142% in younger leaves to 1.520% in older ones. Similarly, rhizomes also increased in silica content with age, varying from 0.137% in younger portions …

Procedures For Eradication Of Hydrozoan Pests In Closed-System Mysid Culture, Adrian R. Lawler, Steven L. Shepard

Gulf and Caribbean Research

An unidentified species of hydrozoan in the family Eirenidae was inadvertently transported to the Laboratory with a stock of Mysidopsis bahia. The hydrozoan competed for food, ate the young mysids, and subsequently reproduced extensively. Hermit crabs provided minimal control. A detailed transfer procedure for the mysids eliminated the hydrozoans from cultures; hydrozoans were eradicated from tanks after removal of mysids by using 1:1200 formalin, hot water, and Clorox.

New Hosts For Lymphocystis, Adrian W. Lawler, John T. Ogle, Chad Donnes

Gulf and Caribbean Research

Lymphocystis disease is reported for the first time from the Koran angelfish, Pomacanthus semicirculatus; the Moorish idol, Zanclus canescens; the foureye butterflyfish, Chaetodon capistratus; and the orbiculate bat fish, Platax orbicularis. Also, lymphocystis is reported the second time from the queen angelfish, Holacanthus ciliaris. All hosts are commercially important exotic aquarium fishes.

Food Of The Atlantic Croaker, Micropogonias Undulatus, From Mississippi Sound And The Gulf Of Mexico, Robin M. Overstreet, Richard W. Heard

Gulf and Caribbean Research

The diet of the Atlantic croaker from Mississippi Sound has been examined for the first time. Over 83 taxa were encountered, or more than were reported from croaker in any other region. We also found 60 taxa, 36 of which overlapped with the above, in croaker from various offshore stations in the Gulf of Mexico. In Mississippi Sound the frequency of occurrence of items revealed primarily crustaceans followed by polychaetes, molluscs, fishes, and less common items, and, in the open Gulf, molluscs appeared slightly more often than in inshore croaker and than polychaetes in offshore fish. The diets were assessed …

Classification Of Mississippi Sound As To Estuary Hydrological Type, Charles K. Eleuterius

Gulf and Caribbean Research

Mississippi Sound is classified as to estuary hydrological type by the method of Pritchard (1955). Differences in salinity between surface and near-bottom water were calculated from 2,401 pairs of observations made at 90 stations from 4 April 1973 to 12 April 1977. Frequency distribution tables, constructed by tallying the vertical salinity differences into three classes corresponding to three of Pritchard's estuary types (A, stratified; B, partially mixed; D, well mixed) were used to assess salinity structure of the water column. The greatest variation as to type occurred from January through June. From July through December, the water column becomes predominately …

An Improved, Conceptually Simple Technique For Estimating The Productivity Of Marsh Vascular Flora, Courtney T. Hackney, Olga P. Hackney

Gulf and Caribbean Research

The estimation of the net primary productivity of marsh communities with a periodic maximum-minimum (PMM) technique has certain advantages over the long used maximum-minimum standing stock technique, but still retains the same conceptual simplicity. The final productivity estimate with PMM is based an the entire data set rather than just two points. Direct statistical comparisons between any two communities can be made. An estimate of the productivity by minor species in the community can also be made. The periodic model permits statistical comparisons about other variables in community growth such as the timing of the maximurn standing crop. With certain …