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Using Fish Population Metrics to Compare the Effects of Artificial Reef Density.

Froehlich CY, Kline RJ - PLoS ONE (2015)

Bottom Line: In the present study, the effects of reef density were assessed for fish communities and sizes of economically valuable Lutjanus campechanus 13 km off Port Mansfield, Texas, at a reef composed of more than 4000 concrete culverts.Fish communities did not significantly differ among density categories; however, highest species richness and total abundances were observed at intermediate culvert densities and at natural reefs.Whereas the abundance of L. campechanus did not differ among density categories, mean total lengths of L. campechanus were greatest at the lower density.

View Article: PubMed Central - PubMed

Affiliation: Department of Biological Sciences, University of Texas at Brownsville, Brownsville, Texas, United States of America.

ABSTRACT
Artificial reefs continue to be added as habitat throughout the world, yet questions remain about how reef design affects fish diversity and abundance. In the present study, the effects of reef density were assessed for fish communities and sizes of economically valuable Lutjanus campechanus 13 km off Port Mansfield, Texas, at a reef composed of more than 4000 concrete culverts. The study spanned from May to June in 2013 and 2014, and sites sampled included natural reefs, bare areas, and varying culvert patch density categories, ranging from 1-190 culverts. Abundances of adults and species evenness of juvenile populations differed between the years. Fish communities did not significantly differ among density categories; however, highest species richness and total abundances were observed at intermediate culvert densities and at natural reefs. Whereas the abundance of L. campechanus did not differ among density categories, mean total lengths of L. campechanus were greatest at the lower density. Our findings suggest that reefs should be deployed with intermediate patch density of 71-120 culverts in a 30-m radius to yield the highest fish abundances.

No MeSH data available.


(a) Age distributions of Lutjanus campechanus lengths-at-age data from the present study, calculated from the Syc (2011) Von Bertalanffy growth model. (b) Comparison of several growth models for L. campechanus in the Gulf of Mexico, with the data from the present study indicated by the solid oval.
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pone.0139444.g006: (a) Age distributions of Lutjanus campechanus lengths-at-age data from the present study, calculated from the Syc (2011) Von Bertalanffy growth model. (b) Comparison of several growth models for L. campechanus in the Gulf of Mexico, with the data from the present study indicated by the solid oval.

Mentions: Using the Syc (2011) Von Bertalanffy growth curve equation coefficients, L. campechanus age estimates in the present study ranged from 0.6 to 6.8 years old, with an average age of 1.95 ± 0.03 years (Fig 6a). When comparing the predicted age of fish in this study with two other growth models (Fig 6b), average age estimates of L. campechanus varied by 0.19 years [22,34].


Using Fish Population Metrics to Compare the Effects of Artificial Reef Density.

Froehlich CY, Kline RJ - PLoS ONE (2015)

(a) Age distributions of Lutjanus campechanus lengths-at-age data from the present study, calculated from the Syc (2011) Von Bertalanffy growth model. (b) Comparison of several growth models for L. campechanus in the Gulf of Mexico, with the data from the present study indicated by the solid oval.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4589336&req=5

pone.0139444.g006: (a) Age distributions of Lutjanus campechanus lengths-at-age data from the present study, calculated from the Syc (2011) Von Bertalanffy growth model. (b) Comparison of several growth models for L. campechanus in the Gulf of Mexico, with the data from the present study indicated by the solid oval.
Mentions: Using the Syc (2011) Von Bertalanffy growth curve equation coefficients, L. campechanus age estimates in the present study ranged from 0.6 to 6.8 years old, with an average age of 1.95 ± 0.03 years (Fig 6a). When comparing the predicted age of fish in this study with two other growth models (Fig 6b), average age estimates of L. campechanus varied by 0.19 years [22,34].

Bottom Line: In the present study, the effects of reef density were assessed for fish communities and sizes of economically valuable Lutjanus campechanus 13 km off Port Mansfield, Texas, at a reef composed of more than 4000 concrete culverts.Fish communities did not significantly differ among density categories; however, highest species richness and total abundances were observed at intermediate culvert densities and at natural reefs.Whereas the abundance of L. campechanus did not differ among density categories, mean total lengths of L. campechanus were greatest at the lower density.

View Article: PubMed Central - PubMed

Affiliation: Department of Biological Sciences, University of Texas at Brownsville, Brownsville, Texas, United States of America.

ABSTRACT
Artificial reefs continue to be added as habitat throughout the world, yet questions remain about how reef design affects fish diversity and abundance. In the present study, the effects of reef density were assessed for fish communities and sizes of economically valuable Lutjanus campechanus 13 km off Port Mansfield, Texas, at a reef composed of more than 4000 concrete culverts. The study spanned from May to June in 2013 and 2014, and sites sampled included natural reefs, bare areas, and varying culvert patch density categories, ranging from 1-190 culverts. Abundances of adults and species evenness of juvenile populations differed between the years. Fish communities did not significantly differ among density categories; however, highest species richness and total abundances were observed at intermediate culvert densities and at natural reefs. Whereas the abundance of L. campechanus did not differ among density categories, mean total lengths of L. campechanus were greatest at the lower density. Our findings suggest that reefs should be deployed with intermediate patch density of 71-120 culverts in a 30-m radius to yield the highest fish abundances.

No MeSH data available.