Species composition of local riffle beetle (Coleoptera: Elmidae) assemblages in small coastal streams of the Gulf of Mexico: the influences of local and regional factors

2014 ◽  
Vol 48 (2) ◽  
pp. 127-141 ◽  
Author(s):  
John W. McCreadie ◽  
Chris Bedwell
Keyword(s):  
Gulf Of Mexico ◽  
Species Composition ◽  
Coastal Streams ◽  
Regional Factors

Free-living marine planktonic unarmoured dinoflagellates from the Gulf of Mexico and the Mexican Pacific

2015 ◽  
Vol 58 (1) ◽  
Author(s):  
Sergio Escobar-Morales ◽  
David U. Hernández-Becerril
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Gulf Of Mexico ◽  
Species Composition ◽  
New Records ◽  
Morphological Characters ◽  
Phylogenetic Group ◽  
Free Living ◽  
Mexican Pacific ◽  
Scanning Electron

AbstractThe so-called unarmoured dinoflagellates are not a “natural” (phylogenetic) group but they lack thecal plates, share fragility and possess relatively few morphological characters that can be positively identified. This study depicts the species composition of unarmoured dinoflagellates collected from sites along the coasts of the Gulf of Mexico and the Mexican Pacific and includes their descriptions and illustrations. We identified a total of 25 species belonging to 13 genera and six families that were studied through various techniques using light and scanning electron microscopy. Seven new records for the Mexican Pacific are annotated here that include

scholarly journals Variation in Species Composition, Size and Fitness of Two Multi-Species Sea Turtle Assemblages Using Different Neritic Habitats

2021 ◽  
Vol 7 ◽  
Author(s):  
Margaret M. Lamont ◽  
Darren Johnson
Keyword(s):  
Gulf Of Mexico ◽  
Species Composition ◽  
Body Condition ◽  
Sea Turtles ◽  
Condition Index ◽  
Sea Turtle ◽  
Body Condition Index ◽  
Turtle Species ◽  
Green Turtles ◽  
Sand Bottom

The neritic environment is rich in resources and as such plays a crucial role as foraging habitat for multi-species marine assemblages, including sea turtles. However, this habitat also experiences a wide array of anthropogenic threats. To prioritize conservation funds, targeting areas that support multi-species assemblages is ideal. This is particularly important in the Gulf of Mexico where restoration actions are currently ongoing following the Deepwater Horizon oil spill. To better understand these areas in the Gulf of Mexico, we characterized two multi-species aggregations of sea turtles captured in different neritic habitats. We described species composition and size classes of turtles, and calculated body condition index for 642 individuals of three species captured from 2011 to 2019: 13.6% loggerheads (Caretta caretta), 44.9% Kemp’s ridleys (Lepidochelys kempii) and 41.4% green turtles (Chelonia mydas). Species composition differed between the two sites with more loggerheads captured in seagrass and a greater proportion of green turtles captured in sand bottom. Turtles in sand bottom were smaller and weighed less than those captured in seagrass. Although small and large turtles were captured at both sites, the proportions differed between sites. Body condition index of green turtles was lower in sand habitat than seagrass habitat; there was no difference for Kemp’s ridleys or loggerheads. In general, smaller green turtles had a higher body condition index than larger green turtles. We have identified another habitat type used by juvenile sea turtle species in the northern Gulf of Mexico. In addition, we highlight the importance of habitat selection by immature turtles recruiting from the oceanic to the neritic environment, particularly for green turtles.

Seasonal and spatial variation in the abundance and size distribution of fishes associated with a petroleum platform in the northern Gulf of Mexico

1997 ◽  
Vol 54 (5) ◽  
pp. 1166-1176 ◽  
Author(s):  
D R Stanley ◽  
C A Wilson
Keyword(s):  
Coral Reef ◽  
Gulf Of Mexico ◽  
Species Composition ◽  
Target Strength ◽  
Lutjanus Campechanus ◽  
Point Count ◽  
Northern Gulf Of Mexico ◽  
Current Vector ◽  
Dual Beam ◽  
Balistes Capriscus

Stationary dual-beam hydroacoustics and visual point count surveys were used in tandem to measure the density, target strength, and species composition of fishes associated with a petroleum platform in the northern Gulf of Mexico. Fish densities ranged from 0 to 10.5 fish · m-3 during monthly sampling trips from January 1991 to May 1992. Density and target strength were spatially and temporally variable. Target strengths varied significantly with side of the platform, month, and east and north current vectors. Density varied significantly with platform side, month, east current vector, and depth. Density and target strength did not change over 24 h periods or with water temperature. Fish densities were highest adjacent to the platform and decreased significantly beyond 16 m. Approximately 1990 - 28<|>100 fish were associated with the platform depending on the month. A total of 19 species were observed at the platform, with Chaetodipterus faber, Caranx fusus, Seriola dumerili, Balistes capriscus,Lutjanus campechanus, andArchosargus probatocephalus constituting 97% of observed fishes. Based on our results, we conclude that the fishes associated with a petroleum platform conform with the open nonequilibrium hypothesis proposed for fishes in coral reef habitats.

Method for estimating relative abundance and species composition around oil and gas platforms in the northern Gulf of Mexico, U.S.A.

2018 ◽  
Vol 201 ◽  
pp. 44-55 ◽  
Author(s):  
Emily M. Reynolds ◽  
James H. Cowan ◽  
Kristy A. Lewis ◽  
Kirsten A. Simonsen
Keyword(s):  
Gulf Of Mexico ◽  
Species Composition ◽  
Relative Abundance ◽  
Oil And Gas ◽  
Northern Gulf Of Mexico

scholarly journals Changes in Seagrass Species Composition in Northwestern Gulf of Mexico Estuaries: Effects on Associated Seagrass Fauna

PLoS ONE ◽  
2014 ◽  
Vol 9 (9) ◽  
pp. e107751 ◽  
Author(s):  
Brandon R. Ray ◽  
Matthew W. Johnson ◽  
Kirk Cammarata ◽  
Delbert L. Smee
Keyword(s):  
Gulf Of Mexico ◽  
Species Composition ◽  
Seagrass Species

Species composition and distributions of mesopelagic fishes over the slope of the north-central Gulf of Mexico

2010 ◽  
Vol 57 (21-23) ◽  
pp. 1926-1956 ◽  
Author(s):  
Steve W. Ross ◽  
Andrea M. Quattrini ◽  
Adela Y. Roa-Varón ◽  
Jennifer P. McClain
Keyword(s):  
Gulf Of Mexico ◽  
Species Composition ◽  
North Central ◽  
The North

scholarly journals Comparative Abundance, Species Composition, and Demographics of Continental Shelf Fish Assemblages throughout the Gulf of Mexico

2018 ◽  
Vol 10 (3) ◽  
pp. 325-346 ◽  
Author(s):  
Steven A. Murawski ◽  
Ernst B. Peebles ◽  
Adolfo Gracia ◽  
John W. Tunnell ◽  
Maickel Armenteros
Keyword(s):  
Gulf Of Mexico ◽  
Species Composition ◽  
Continental Shelf ◽  
Fish Assemblages
Sign in / Sign up

Export Citation Format

Share Document