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Articles 1 - 11 of 11
Full-Text Articles in Life Sciences
Argulus From The Pascagoula River, Ms, Usa, With An Emphasis On Those Of The Threatened Gulf Sturgeon, Acipenser Oxyinchus Desotoi, Michael J. Andres, Jeremy M. Higgs, Paul O. Grammer, Mark S. Peterson
Argulus From The Pascagoula River, Ms, Usa, With An Emphasis On Those Of The Threatened Gulf Sturgeon, Acipenser Oxyinchus Desotoi, Michael J. Andres, Jeremy M. Higgs, Paul O. Grammer, Mark S. Peterson
Faculty Publications
Species of Argulus (Branchiura Thorell, 1864) are common ectoparasites of freshwater, estuarine, and marine fishes. Argulid identification and taxonomy is often confusing because many species are reported to parasitize multiple host species, have similar morphological characters, and come from various salinity regimes. Gulf sturgeon is an anadromous fish natal to drainages in the north-central Gulf of Mexico, and as with many endangered species, has a poorly documented parasite community. During Gulf sturgeon tagging and monitoring studies (2016–2019) in the Pascagoula River, MS, USA, species of Argulus were collected from Gulf sturgeon as well as other incidentally captured fishes. Argulus flavescens …
Prospects For The Sustainable Management Of Public Oyster Resources, Thomas M. Soniat, Nathan A. Cooper, Eric N. Powell
Prospects For The Sustainable Management Of Public Oyster Resources, Thomas M. Soniat, Nathan A. Cooper, Eric N. Powell
Faculty Publications
Common-pool resources such as public oyster grounds are especially vulnerable to overexploitation and habitat loss. Like those elsewhere, oyster populations and habitat of Louisiana public grounds are in decline. To maintain reef habitat and increase oyster abundance, a sustainable harvest model is applied, which allows harvest above that required to maintain reef cultch stasis. The model is restrained to promote shell gain by limiting fishing by area, type (sack versus seed), effort, and season. Harvest quotas and cultch removal rates derived from shell-budget–based modeling are a foundation for sustainable management of public oyster resources.
Comparison Of Age And Growth Parameters Of Invasive Red Lionfish (Pterois Volitans) Across The Northern Gulf Of Mexico, Alexander Q. Fogg, Joseph T. Evans, Mark S. Peterson, Nancy Brown-Peterson, Eric R. Hoffmayer, G. Walter Ingram Jr.
Comparison Of Age And Growth Parameters Of Invasive Red Lionfish (Pterois Volitans) Across The Northern Gulf Of Mexico, Alexander Q. Fogg, Joseph T. Evans, Mark S. Peterson, Nancy Brown-Peterson, Eric R. Hoffmayer, G. Walter Ingram Jr.
Faculty Publications
Invasive red lionfish (Pterois volitans) have spread rapidly throughout the northern Gulf of Mexico (GOM) partly because of their high growth rate. Red lionfish were collected from the northern GOM across 3 ecological regions from 2012 through 2015. For male and female red lionfish, relationships between weight and total length (TL) were differnt by ecological region. Males acheives a greater mean weight adjusted for TL (333.6 g [standar errer (SE) 3.6]) than females (195.1 g [SE 3.7]). A subsample of 1607 pairs of sagittal otoliths (from 744 males, 716 females, and 147 fish of unknown or undetermined sex) …
In Situ Observations Of Fish Larvae Encased Within A Pelagic Gelatinous Matrix, Adam T. Greer, Luciano M. Chiaverano, James G. Ditty, Frank J. Hernandez
In Situ Observations Of Fish Larvae Encased Within A Pelagic Gelatinous Matrix, Adam T. Greer, Luciano M. Chiaverano, James G. Ditty, Frank J. Hernandez
Faculty Publications
The degree to which marine fish larvae aggregate (i.e. patchiness) is predominantly determined by the physical oceanographic environment. Biological traits, however, can also influence spatial distributions and have adaptive value for larvae (e.g. favorable transport or reducing predation mortality). Although several fish families are known to release eggs within a gelatinous matrix, hatched larvae have not been found inside this type of structure. We present observations of hatched, preflexion yolk-sac larvae encased within a pelagic gelatinous matrix (mass). Two different masses (40-60 mm in length) containing free swimming, elongate larvae were imaged in the northern Gulf of Mexico (nGOM) near …
Sex-Specific Growth And Reproductive Dynamics Of Red Drum In The Northern Gulf Of Mexico, Corbin F. Bennetts, Robert T. Leaf, Nancy J. Brown-Peterson
Sex-Specific Growth And Reproductive Dynamics Of Red Drum In The Northern Gulf Of Mexico, Corbin F. Bennetts, Robert T. Leaf, Nancy J. Brown-Peterson
Faculty Publications
The Red Drum Sciaenops ocellatus stock is heavily targeted in the Gulf of Mexico (GOM) by recreational fishers and supports a small commercial fishery in Mississippi. Despite their popularity, little recent work has been done to describe their life history. In this work, we describe sex‐specific growth and reproductive dynamics of Red Drum collected from the northern GOM from September 2016 through October 2017. We evaluated seven candidate growth models and found that the three‐parameter von Bertalanffy growth function (VBGF) was the best candidate length‐at‐age model. No significant difference in growth between sexes was observed with the three‐parameter VBGF, despite …
Age And Growth Of Gray Triggerfish (Balistes Capriscus) From A North-Central Gulf Of Mexico Artifical Reef Zone, Amanda E. Jefferson, Robert J. Allman, Ashley E. Pacicco, James S. Franks, Frank J. Hernandez, Mark A. Albins, Sean P. Powers, Robert L. Shipp, J. Marcus Drymon
Age And Growth Of Gray Triggerfish (Balistes Capriscus) From A North-Central Gulf Of Mexico Artifical Reef Zone, Amanda E. Jefferson, Robert J. Allman, Ashley E. Pacicco, James S. Franks, Frank J. Hernandez, Mark A. Albins, Sean P. Powers, Robert L. Shipp, J. Marcus Drymon
Faculty Publications
The overexploitation of many traditionally targeted reef fishes such as red snapper (Lutjanus campechanus, Poey 1860), alongside the implementation of increasingly restrictive management measures on those species, has led to increased targeting of conventionally discarded Gulf of Mexico gray triggerfish (Balistes capriscus, Gmelin 1789) commercially and recreationally. The goal of this study was to assess age and growth of gray triggerfish from the Alabama Artificial Reef Zone in the north-central Gulf of Mexico. Gray triggerfish (n = 1135) were collected predominantly from artificial habitat during 1999 – 2017. Specimens were sexed macroscopically and ages were assigned …
Importance Of Weak Trophic Interactions In The Structure Of The Food Web In La Paz Bay, Southern Gulf Of California: A Topological Approach, Andrés F. Navia, Sergio R. Maciel-Zapata, Adrián F. González-Acosta, Robert T. Leaf, Victor H. Cruz-Escalona
Importance Of Weak Trophic Interactions In The Structure Of The Food Web In La Paz Bay, Southern Gulf Of California: A Topological Approach, Andrés F. Navia, Sergio R. Maciel-Zapata, Adrián F. González-Acosta, Robert T. Leaf, Victor H. Cruz-Escalona
Faculty Publications
Here, we describe the trophic structure of the La Paz Bay, Baja California Sur, Mexico, and evaluate the role of weak trophic interactions in the ecosystem using a suite of topological indices. We used information derived from published and unpublished stomach contents analysis studies from the region to construct an unweighted and directional trophic network (comprising 250 nodes and 1528 associated interactions) to assess the impact of predators in three scenarios. Each scenario simulated the removal of weak interactions corresponding to removal of those nodes with trophic contributions less than 5%, 10%, and 15%. In each removal scenario, the nodes …
White Spot Syndrome Virus (Wssv) In Cultured Juvenile Blue Crabs Callinectes Sapidus: Oral Versus Injection Exposure, And Feeding Frequency Effects, Reginald B. Blaylock, Stephen S. Curran, Jeffrey M. Lotz
White Spot Syndrome Virus (Wssv) In Cultured Juvenile Blue Crabs Callinectes Sapidus: Oral Versus Injection Exposure, And Feeding Frequency Effects, Reginald B. Blaylock, Stephen S. Curran, Jeffrey M. Lotz
Faculty Publications
The efficacy of oral versus injection exposure and the effect of feeding frequency on the transmission of white spot syndrome virus (WSSV) in cultured juvenile blue crabs Callinectes sapidus were investigated. Crabs in Group 1 (G-1, n = 48) were exposed once orally to 100 mg of WSSV-infected shrimp tissue mg-1 of body weight (BW). The oral inoculum contained 2.6 × 109 WSSV genome copies mg-1 tissue. Group 2 (G-2, n = 46) received the same dosage once weekly for 5 wk. Group 3 (G-3, n = 12) was injected with 0.01 ml (2.6 × 107 …
Population Connectivity Of Pelagic Megafauna In The Cuba-Mexico-United States Triangle, Jay R. Rooker, Michael A. Dance, R.J. David Wells, Matthew J. Ajemian, Barbara A. Block, Michael R. Castleton, J. Marcus Drymon, Brett J. Falterman, James S. Franks, Neil Hammerschlag, Jill M. Hendon, Eric R. Hoffmayer, Richard T. Kraus, Jennifer A. Mckinney, David H. Secor, Gregory W. Stunz, John F. Walter
Population Connectivity Of Pelagic Megafauna In The Cuba-Mexico-United States Triangle, Jay R. Rooker, Michael A. Dance, R.J. David Wells, Matthew J. Ajemian, Barbara A. Block, Michael R. Castleton, J. Marcus Drymon, Brett J. Falterman, James S. Franks, Neil Hammerschlag, Jill M. Hendon, Eric R. Hoffmayer, Richard T. Kraus, Jennifer A. Mckinney, David H. Secor, Gregory W. Stunz, John F. Walter
Faculty Publications
The timing and extent of international crossings by billfishes, tunas, and sharks in the Cuba-Mexico-United States (U.S.) triangle was investigated using electronic tagging data from eight species that resulted in >22,000 tracking days. Transnational movements of these highly mobile marine predators were pronounced with varying levels of bi- or tri-national population connectivity displayed by each species. Billfishes and tunas moved throughout the Gulf of Mexico and all species investigated (blue marlin, white marlin, Atlantic bluefin tuna, yellowfin tuna) frequently crossed international boundaries and entered the territorial waters of Cuba and/or Mexico. Certain sharks (tiger shark, scalloped hammerhead) displayed prolonged periods …
Retrieval Of Phytoplankton Pigments From Underway Spectrophotometry In The Fram Strait, Yangyang Liu, Emmanuel Boss, Alison Chase, Hongyan Xi, Xiaodong Zhang, Rüdiger Röttgers, Yanqun Pan, Astrid Bracher
Retrieval Of Phytoplankton Pigments From Underway Spectrophotometry In The Fram Strait, Yangyang Liu, Emmanuel Boss, Alison Chase, Hongyan Xi, Xiaodong Zhang, Rüdiger Röttgers, Yanqun Pan, Astrid Bracher
Faculty Publications
Phytoplankton in the ocean are extremely diverse. The abundance of various intracellular pigments are often used to study phytoplankton physiology and ecology, and identify and quantify different phytoplankton groups. In this study, phytoplankton absorption spectra (αph(λ)) derived from underway flow-through AC-S measurements in the Fram Strait are combined with phytoplankton pigment measurements analyzed by high-performance liquid chromatography (HPLC) to evaluate the retrieval of various pigment concentrations at high spatial resolution. The performances of two approaches, Gaussian decomposition and the matrix inversion technique are investigated and compared. Our study is the first to apply the matrix inversion …
A Scientific Name For Pacific Oysters, Brian Bayne, Marc Anglès D'Auriac, Thierry Backeljau, Peter Beninger, Pierre Boudry, Ryan B. Carnegie, Jonathan P. Davis, Ximing Guo, Dennis Hedgecock, Maureen Krause, Chris Langdon, Sylvie Lapègue, Donal Manahan, Roger Mann, Eric Powell, Sandra Shumway
A Scientific Name For Pacific Oysters, Brian Bayne, Marc Anglès D'Auriac, Thierry Backeljau, Peter Beninger, Pierre Boudry, Ryan B. Carnegie, Jonathan P. Davis, Ximing Guo, Dennis Hedgecock, Maureen Krause, Chris Langdon, Sylvie Lapègue, Donal Manahan, Roger Mann, Eric Powell, Sandra Shumway
Faculty Publications
No abstract provided.