scholarly journals Modelling community structure and species co-occurrence using fishery observer data

2016 ◽  
Vol 73 (7) ◽  
pp. 1750-1763 ◽  
Author(s):  
Jeffrey Robert Pulver ◽  
Hui Liu ◽  
Elizabeth Scott-Denton
Keyword(s):  
Cluster Analysis ◽  
Community Structure ◽  
Gulf Of Mexico ◽  
Reef Fish ◽  
Efficient Method ◽  
Probabilistic Models ◽  
Distinct Species ◽  
Common Species ◽  
Species Relationships ◽  
Correlation Measure

Abstract In this study, we modelled fishery observer data to compare methods of identifying community structure using cluster analyses to determine stratifications and probabilistic models for examining species co-occurrence in the Gulf of Mexico deepwater reef fish fishery. Comparing cluster analysis methods, the correlation measure of dissimilarity in combination with average agglomerative linkage was the most efficient method for determining species relationships using simulated random species as a comparison tool. Cluster analysis revealed distinct species stratifications and in combination with multiscale bootstrapping generated probabilities indicating the strength of stratifications in the fishery. A more parsimonious approach with probabilistic models was also developed to quantify pairwise species co-occurrence as random, positive, or negative based on the observed vs. expected fishing sets with co-occurrence. For the most common species captured, the probabilistic models predicted positive or negative co-occurrence between 84.2% of the pairwise combinations examined. These methods provide fishery managers tools for determining multispecies quota allocations and offer insights into other bycatch species of interest.

scholarly journals Helminth Parasites of Scorpaena brasiliensis and S. plumieri (Perciformes: Scorpaenidae) from reefs of Veracruz, Mexico, Southern Gulf of Mexico

2018 ◽  
Author(s):  
Jesus Montoya-Mendoza ◽  
Sandra Edith Badillo-López ◽  
Isabel Araceli Amaro-Espejo ◽  
María del Refugio Castañeda-Chávez ◽  
Fabiola Lango-Reynoso ◽  
...  
Keyword(s):  
Community Structure ◽  
Gulf Of Mexico ◽  
Parasite Community ◽  
Common Species ◽  
Shannon Index ◽  
Helminth Parasites ◽  
Helminth Community ◽  
Parasitic Helminths ◽  
Southern Gulf Of Mexico ◽  
Community Component

Both S. brasiliensis and S. plumieri are relevant species in reef systems, but little is known about their parasitic helminths and community structure. This work describes such community in terms of species richness and diversity. A helminthological study was conducted on 33 specimens of S. brasiliensis and 36 of S. plumieri, captured in the Pájaros and Cabezo Reefs, in the Veracruz Reef System National Park (VRSNP), Ver., Mexico. The helminth community structure was analyzed in both hosts. A total of 10 parasitic species was registered for S. brasiliensis (trematodes, 5; nematodes, 3; cestodes, 1; acanthocephals, 1). S. plumieri hosted 11 species (trematodes, 4; nematodes, 4; monogeneans, 1; cestodes, 1; acanthocephals, 1), with 8 common species. Overall, parasites had prevalences < 20%, as Pseudocapillaria (Icthyocapillaria) sp., with 18.2% and 19.4% in S. brasiliensis and S. plumieri, respectively. Community component richness for S. brasiliensis was S=10, with Shannon index diversity value of H’=2.08. For S. plumieri, such values were of S=11 and H’=1.91. The richness and diversity in the components community and infracommunity of parasitic helminths for both hosts are lower than in other parasite community of marine fish Southern Gulf of Mexico.

scholarly journals Helminth Parasites of Scorpaena brasiliensis and S. plumieri (Perciformes: Scorpaenidae) from reefs of Veracruz, Mexico, Southern Gulf of Mexico

2018 ◽  
Author(s):  
Jesus Montoya-Mendoza ◽  
Sandra Edith Badillo-López ◽  
Isabel Araceli Amaro-Espejo ◽  
María del Refugio Castañeda-Chávez ◽  
Fabiola Lango-Reynoso ◽  
...  
Keyword(s):  
Community Structure ◽  
Gulf Of Mexico ◽  
Parasite Community ◽  
Common Species ◽  
Shannon Index ◽  
Helminth Parasites ◽  
Helminth Community ◽  
Parasitic Helminths ◽  
Southern Gulf Of Mexico ◽  
Community Component

Both S. brasiliensis and S. plumieri are relevant species in reef systems, but little is known about their parasitic helminths and community structure. This work describes such community in terms of species richness and diversity. A helminthological study was conducted on 33 specimens of S. brasiliensis and 36 of S. plumieri, captured in the Pájaros and Cabezo Reefs, in the Veracruz Reef System National Park (VRSNP), Ver., Mexico. The helminth community structure was analyzed in both hosts. A total of 10 parasitic species was registered for S. brasiliensis (trematodes, 5; nematodes, 3; cestodes, 1; acanthocephals, 1). S. plumieri hosted 11 species (trematodes, 4; nematodes, 4; monogeneans, 1; cestodes, 1; acanthocephals, 1), with 8 common species. Overall, parasites had prevalences < 20%, as Pseudocapillaria (Icthyocapillaria) sp., with 18.2% and 19.4% in S. brasiliensis and S. plumieri, respectively. Community component richness for S. brasiliensis was S=10, with Shannon index diversity value of H’=2.08. For S. plumieri, such values were of S=11 and H’=1.91. The richness and diversity in the components community and infracommunity of parasitic helminths for both hosts are lower than in other parasite community of marine fish Southern Gulf of Mexico.

scholarly journals An Analysis of Artificial Reef Fish Community Structure along the Northwestern Gulf of Mexico Shelf: Potential Impacts of “Rigs-to-Reefs” Programs

PLoS ONE ◽  
2015 ◽  
Vol 10 (5) ◽  
pp. e0126354 ◽  
Author(s):  
Matthew J. Ajemian ◽  
Jennifer J. Wetz ◽  
Brooke Shipley-Lozano ◽  
J. Dale Shively ◽  
Gregory W. Stunz
Keyword(s):  
Community Structure ◽  
Gulf Of Mexico ◽  
Reef Fish ◽  
Fish Community ◽  
Artificial Reef ◽  
Fish Community Structure ◽  
Reef Fish Community

scholarly journals Ant community structure and response to disturbances on coastal dunes of Gulf of Mexico

2014 ◽  
Vol 19 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Xuan Chen ◽  
Benjamin Adams ◽  
Cody Bergeron ◽  
Alexander Sabo ◽  
Linda Hooper-Bùi
Keyword(s):  
Community Structure ◽  
Gulf Of Mexico ◽  
Coastal Dunes ◽  
Ant Community ◽  
Ant Community Structure

Gulf of Mexico hydrocarbon seep communities: VI. Patterns in community structure and habitat

1990 ◽  
Vol 10 (4) ◽  
pp. 244-252 ◽  
Author(s):  
I. Rosman MacDonald ◽  
Norman L. Guinasso ◽  
James F. Reilly ◽  
James M. Brooks ◽  
W. Russell Callender ◽  
...  
Keyword(s):  
Community Structure ◽  
Gulf Of Mexico ◽  
Hydrocarbon Seep

scholarly journals Diversity and Community Structure of Oribatid Mites (Acari, Oribatei) at Memorial Complexes of a Megapolis

2013 ◽  
Vol 47 (4) ◽  
pp. 291-297
Author(s):  
L. A. Kolodochka ◽  
O. S. Shevchenko
Keyword(s):  
Community Structure ◽  
Species Diversity ◽  
Species Complex ◽  
Common Species ◽  
Oribatid Mites ◽  
Direct Relation ◽  
City Center ◽  
Degree Of Dominance ◽  
Different Types ◽  
The City

Abstract In different types of substrate (soil, litter, lichens and mosses) collected at three memorial complexes (cemeteries) of Kyiv (Ukraine), 70 species from 57 genera, 34 families of oribatid mites were found. A few eurytopic species capable of tolerance to different types of pollution make up an essential part in each species complex. The species diversity and complexity of oribatid community structure at researched areas increased with distance from the city center. There was no direct relation between the degree of dominance of most common species and the cemetery’s relative remoteness from the center of the city.

Lessons learned from data-limited evaluations of data-rich reef fish species in the Gulf of Mexico: implications for providing fisheries management advice for data-poor stocks

2019 ◽  
Vol 76 (9) ◽  
pp. 1624-1639 ◽  
Author(s):  
Skyler R. Sagarese ◽  
William J. Harford ◽  
John F. Walter ◽  
Meaghan D. Bryan ◽  
J. Jeffery Isely ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Reef Fish ◽  
Fish Species ◽  
Stock Assessment ◽  
Lessons Learned ◽  
Management Objectives ◽  
Trade Offs ◽  
Data Limitations ◽  
Management Procedures ◽  
Reef Fish Species

Specifying annual catch limits for artisanal fisheries, low economic value stocks, or bycatch species is problematic due to data limitations. Many empirical management procedures (MPs) have been developed that provide catch advice based on achieving a stable catch or a historical target (i.e., instead of maximum sustainable yield). However, a thorough comparison of derived yield streams between empirical MPs and stock assessment models has not been explored. We first evaluate trade-offs in conservation and yield metrics for data-limited approaches through management strategy evaluation (MSE) of seven data-rich reef fish species in the Gulf of Mexico. We then apply data-limited approaches for each species and compare how catch advice differs from current age-based assessment models. MSEs identified empirical MPs (e.g., using relative abundance) as a compromise between data requirements and the ability to consistently achieve management objectives (e.g., prevent overfishing). Catch advice differed greatly among data-limited approaches and current assessments, likely due to data inputs and assumptions. Adaptive MPs become clearly viable options that can achieve management objectives while incorporating auxiliary data beyond catch-only approaches.

scholarly journals Distribution of naked amoebae in the soils of the steppe zone of Ukraine

2020 ◽  
pp. 159-166
Author(s):  
M. Patsyuk ◽  
Keyword(s):  
Cluster Analysis ◽  
Multidimensional Scaling ◽  
Species Complex ◽  
Steppe Zone ◽  
Common Species ◽  
Molecular Clusters ◽  
The Other ◽  
Steppe Region ◽  
Species Complexes ◽  
Naked Amoebae

As a result of the study, in the steppe zone of Ukraine (Odessa, Mykolaiv, Kirovohrad region), 12 species of naked amoebas were identified, which according to the modern Eukaryot system belong to three molecular clusters Tubulinea Smirnov et al., 2005, Discosea Cavalier-Smith, 2004., Discoba Simpson and Hampl et al., 2009. This species Vahlkampfia sp. (1), Vahlkampfia sp. (2), Deuteramoeba mycophaga Page, 1988, Saccamoeba stagnicola Page, 1974, Vexillifera sp., Vannella sp. Ripellaplatypodia Smirnov, Nassonova, Chao et Cavalier-Smith, 2007, Cochliopodium sp. (1), Mayorella sp., Thecamoeba striata Penard, 1890, Stenamoeba stenopodia (Page, 1969) Smirnov et al., 2007, Acanthamoeba sp. (1). In the studied steppe soils, the most common were Vahlkampfia sp. (2), S. stenopodia, Vahlkampfia sp. (1), Vexillifera sp., Cochliopodium sp. (1); the least common – R. platypodia, D. mycophaga, T. striata, Mayorella sp. As a result of the cluster analysis, it was found that the largest share of common species is observed between Mykolaiv and Kirovograd regions (0.71) and Odessa and Kirovograd regions (0.53); the smallest is between the Odessa and Mykolaiv regions (0.43). According to the results of cluster analysis, the faunistic complexes of soil species of amoebae of the steppe region of Ukraine are united into two clusters: one of them being complexes characteristic of the Odessa region, and the other complexes of the Mykolaiv and Kirovograd regions. According to the results of nonparametric multidimensional scaling, it is established that the species complex of soil amoebae in the Kirovograd and Mykolaiv regions is determined by the increased soil temperature and acidity, compared to the Odessa region. As for moisture, this factor has little effect on the species complexes amoebae steppe region of Ukraine.

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