Depth-range distribution and diversity patterns of a polychaete (Annelida) community in the continental shelf of the Southern Gulf of Mexico

2022 ◽  
pp. 107739
Author(s):  
Benjamín Quiroz-Martínez ◽  
Pablo Hernández-Alcántara ◽  
David Alberto Salas-de León ◽  
Vivianne Solís-Weiss ◽  
María Adela Monreal-Gómez
Keyword(s):  
Gulf Of Mexico ◽  
Continental Shelf ◽  
Depth Range ◽  
Diversity Patterns ◽  
Range Distribution ◽  
Southern Gulf Of Mexico

scholarly journals BIOAVAILABLE AND TOTAL COPPER AND LEAD IN TERRIGENOUS SEDIMENTS IN THE INNER CONTINENTAL SHELF OFF VERACRUZ, SOUTHERN GULF OF MEXICO

2021 ◽  
Author(s):  
Guillermo Horta-Puga ◽  
Rafael Andrés Cabral-Tena ◽  
Alejandro Córdova ◽  
Jhoan Gutiérrez-Martínez ◽  
Francisco López-Galindo ◽  
...  
Keyword(s):  
Trace Metals ◽  
Gulf Of Mexico ◽  
Continental Shelf ◽  
Primary Source ◽  
Total Content ◽  
Terrigenous Sediments ◽  
Fine Sediments ◽  
Southern Gulf Of Mexico ◽  
High Concentrations ◽  
Inner Continental Shelf

The inner continental shelf adjacent to the city and port of Veracruz (ICSV) in the southern Gulf of Mexico, which is influenced by the Jamapa River, has been considered to be polluted. Moderate to high Cu and Pb concentrations have previously been reported in the shelf’s terrigenous sediments. These elements are derived from deposition of materials from mainland sources via river transport and may threaten marine life in the coastal area. Because Cu and Pb bioavailability has not been previously assessed in the region, the aim of this study was to determine (i) bioavailability and total concentrations of these elements in the terrigenous sediments of the ICSV, (ii) if concentrations of these elements in sediments are associated with distances from primary sources, and (iii) if concentrations differ during dry and rainy seasons. Bioavailable general average concentrations were 0.21 µg/g for Cu, and 0.24 µg/g for Pb, which accounted for 4.4-4.9 % of the total content. The bioavailable concentrations were higher during the rainy season, and in the fluvial plume of the Jamapa River. The total content of Cu and Pb was significantly associated with fine sediments and exhibited high concentrations in the new port facilities area. Hence, it is concluded that the Jamapa River is a primary source of trace metals to the ICSV. Finally, as concentrations of trace metals are lower than previous records for sediments in the southern Gulf of Mexico and lower than background levels and maximum permissible limits, the ICSV is presently not contaminated by Cu or Pb.

scholarly journals Ichthyofaunal list of the continental slope of the southern Gulf of Mexico

ZooKeys ◽  
2019 ◽  
Vol 846 ◽  
pp. 117-132
Author(s):  
José Martín Ramírez ◽  
Ana Rosa Vázquez-Bader ◽  
Adolfo Gracia
Keyword(s):  
Gulf Of Mexico ◽  
Continental Slope ◽  
Fish Species ◽  
Depth Distribution ◽  
Abundant Species ◽  
Depth Range ◽  
Vertical Zonation ◽  
Southern Gulf Of Mexico ◽  
Depth Ranges ◽  
Swept Area

Four oceanographic cruises were carried out between April 2011 and May 2013 on the continental slope of the southern Gulf of Mexico (GoM) in a depth range of 290 to 1200 m on board the R/V JUSTO SIERRA. A total of 91 trawls covered a total swept area of 170.49 hectares. We recorded 177 fish species belonging to 80 families. Fifteen species extended their distribution into the south of the gulf and 37 increased their depth ranges. Five species could have commercial importance: Aphanopuscarbo Lowe, 1839; Hydrolagusmirabilis (Collett, 1904); Helicolenusdactylopterus (Delaroche, 1809); Lophiusgastrophysus Miranda Ribeiro, 1915, and Merlucciusalbidus (Mitchill, 1818). The most abundant species were Polymixialowei Günther, 1859; Parasudistruculenta (Goode & Bean, 1896); M.albidus, Chlorophthalmusagassizi Bonaparte, 1840; Dibranchusatlanticus Peters, 1876; Nezumiaaequalis (Günther, 1878); Yarrellablackfordi Goode & Bean, 1896; and Laemonemabarbatulum Goode & Bean, 1883. High values of fish species richness, diversity, and evenness were registered throughout the study area. A high percentage of the fish species (97%) collected during this project are distributed in the entire GoM. Most of the species showed a wide depth distribution; however, a vertical zonation of species can be observed.

scholarly journals Reproductive Strategy of a Continental Shelf Lane Snapper Population from the Southern Gulf of Mexico

2021 ◽  
Vol 13 (2) ◽  
pp. 140-156
Author(s):  
Jorge Trejo‐Martínez ◽  
Thierry Brulé ◽  
Natalia Morales‐López ◽  
Teresa Colás‐Marrufo ◽  
Manuel Sánchez‐Crespo
Keyword(s):  
Gulf Of Mexico ◽  
Continental Shelf ◽  
Reproductive Strategy ◽  
Southern Gulf Of Mexico

scholarly journals Oceanic and Neritic Ichthyoplankton at the Edge of the Continental Shelf in the Southern Gulf of Mexico

2000 ◽  
Vol 12 ◽  
Author(s):  
Cesar Flores-Coto ◽  
Fernando Flores-Hernandez ◽  
Faustino Zavala-Garcia ◽  
Virgilio Arenas-Fuentes ◽  
Maria Adela Monreal-Gomez ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Continental Shelf ◽  
Southern Gulf Of Mexico

scholarly journals Polychaete (Annelida) Diversity Patterns in Southern Gulf of Mexico: The Influence of Spatial Structure and Environmental Variables

Diversity ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 425
Author(s):  
Benjamín Quiroz-Martínez ◽  
Pablo Hernández-Alcántara ◽  
David Alberto Salas-de-León ◽  
Vivianne Solís-Weiss
Keyword(s):  
Gulf Of Mexico ◽  
Spatial Structure ◽  
Environmental Variables ◽  
Variation Partitioning ◽  
Spatial Diversity ◽  
Relative Importance ◽  
Polychaete Species ◽  
Significance Level ◽  
Diversity Patterns ◽  
Southern Gulf Of Mexico

A comprehensive database was built to examine the spatial diversity patterns of polychaete species from the continental shelf in Southern Gulf of Mexico. Using Cluster and nMDS analysis we found the composition of polychaete species to be different between the terrigenous and carbonate regions of the Gulf. To test the relative importance of spatial and environmental components in the polychaetae community structure in the Southern Gulf of Mexico, we examined the spatial relationships between polychaetae assemblages and environmental variables over broad geographical scales. A distance-based redundancy analysis (dbRDA) and variation partitioning was used to quantify the relative importance of these explanatory variables on the spatial variations of species richness and composition. Variation partitioning is an important tool to investigate the importance of spatial structure to species distribution in communities, but it has not yet been used in marine ecosystems. The significance level of spatial and environmental components to the distribution of polychaete species showed that the combined effect of spatial processes and sediment characteristics explained a higher percentage of variance than those parameters could alone.

Isotopic characterization of lifetime movement by two demersal fishes from the northeastern Gulf of Mexico

2021 ◽  
Vol 657 ◽  
pp. 161-172
Author(s):  
JL Vecchio ◽  
JL Ostroff ◽  
EB Peebles
Keyword(s):  
Gulf Of Mexico ◽  
Continental Shelf ◽  
Life Histories ◽  
Linear Mixed Model ◽  
Trophic Position ◽  
Eye Lens ◽  
Outer Continental Shelf ◽  
Red Grouper ◽  
Lens Diameter ◽  
Isotopic Characterization

An understanding of lifetime trophic changes and ontogenetic habitat shifts is essential to the preservation of marine fish species. We used carbon and nitrogen stable isotope values (δ13C and δ15N) recorded within the laminar structure of fish eye lenses, reflecting both diet and location over time, to compare the lifetime trends of 2 demersal mesopredators. Tilefish Lopholatilus chamaeleonticeps inhabit burrows on the outer continental shelf, which results in exceptional site fidelity. Red grouper Epinephelus morio are spawned on the middle to outer continental shelf, move to the inner shelf for the juvenile period, and return offshore upon sexual maturity. Both species inhabit the eastern Gulf of Mexico, a region with a distinctive offshore-inshore gradient in background δ13C values. Within individual tilefish (n = 36), sequences of δ13C values and δ15N values had strong, positive correlations with eye-lens diameter, and strong correlations between the 2 isotopes (mean Spearman r = 0.86), reflecting an increase in trophic position with growth and little lifetime movement. In red grouper (n = 30), δ15N values positively correlated with eye-lens diameter, but correlations between δ15N and δ13C were weak (mean Spearman r = 0.29), suggesting cross-shelf ontogenetic movements. Linear mixed model results indicated strong relationships between δ15N and δ13C values in tilefish eye lenses but no convergence in the red grouper model. Collectively, these results are consistent with previously established differences in the life histories of the 2 species, demonstrating the potential utility of eye-lens isotope records, particularly for investigating the life histories of lesser-known species.

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