scholarly journals Comparison of ages determined by using an Eberbach projector and a microscope to read scales from Atlantic menhaden (Brevoortia tyrannus) and Gulf menhaden (B. patronus): suppl. figs. 1-6

2021 ◽  
Vol 119 (1) ◽  
Author(s):  
Amy M. Schueller
Keyword(s):  
Atlantic Menhaden ◽  
Brevoortia Tyrannus

A new method to measure the terminal velocity of small particles: A demonstration using ascending eggs of the Atlantic menhaden (Brevoortia tyrannus)

1998 ◽  
Vol 43 (7) ◽  
pp. 1722-1727 ◽  
Author(s):  
John J. Cambalik ◽  
David M. Checkley ◽  
Daniel Kamykowski
Keyword(s):  
Terminal Velocity ◽  
Atlantic Menhaden ◽  
New Method ◽  
Small Particles ◽  
Brevoortia Tyrannus

Chronic Inflammatory Cells with Epithelial Cell Characteristics in Teleost Fishes

1989 ◽  
Vol 26 (5) ◽  
pp. 429-437 ◽  
Author(s):  
E. J. Noga ◽  
M. J. Dykstra ◽  
J. F. Wright
Keyword(s):  
Epithelial Cells ◽  
Inflammatory Cells ◽  
Oreochromis Mossambicus ◽  
Atlantic Menhaden ◽  
Cytoskeletal Protein ◽  
Teleost Fishes ◽  
Epithelioid Cells ◽  
Brevoortia Tyrannus ◽  
Chronic Inflammatory Response ◽  
High Metabolic Activity

Certain cells that participate in the chronic inflammatory response of teleost fishes have many features typical of epithelioid cells of mammals. Such features include high metabolic activity, frequent phagolysosomes, and cytoplasmic interdigitations between adjacent cells; however, the epithelioid granulomas formed in response to certain diseases in teleost fishes also have several features associated with epithelial cells. Cases of ulcerative mycosis or acid-fast bacterial infection in Atlantic menhaden ( Brevoortia tyrannus), fungal infection in silver perch ( Bairdiella chrysoura), and mycobacteriosis in Mozambique tilapia ( Oreochromis mossambicus) had epithelioid cells that were joined together by well-formed desmosomes with tonofilaments. “Mature granulomas” of the ulcerative mycosis-infected menhaden stained positively for cytokeratin, a cytoskeletal protein that is considered to be highly specific for epithelial cells. The consistent presence of these heretofore unrecognized epithelial features suggest that they may be characteristic of certain types of cells participating in piscine chronic inflammation.

Conservation, Ecology, and Management of Catfish: The Second International Symposium

2011 ◽  
Keyword(s):  
Chesapeake Bay ◽  
Fork Length ◽  
Atlantic Menhaden ◽  
Tidal River ◽  
Human Consumption ◽  
Apex Predators ◽  
Blue Catfish ◽  
Brevoortia Tyrannus ◽  
Conflicting Demands ◽  
Peak Abundance

<em>Abstract</em>.—Rapid increase in abundance and expanded distribution of introduced blue catfish <em>Ictalurus furcatus</em> populations in the Chesapeake Bay watershed have raised regional management concerns. This study uses information from multiple surveys to examine expansion of blue catfish populations and document their role in tidal river communities. Originally stocked in the James, York, and Rappahannock River systems for development of commercial and recreational fisheries, blue catfish have now been documented in adjacent rivers and have expanded their within-river distribution to oligo- and mesohaline environments. Range expansions coincided with periods of peak abundance in 1996 and 2003 and with the concurrent decline in abundance of native white catfish <em>I. catus</em>. Blue catfish in these systems use a diverse prey base; various amphipod species typically dominate the diet of smaller individuals (<300 mm fork length [FL]), and fishes are common prey for larger blue catfish (>300 mm FL). Recent studies based on stable isotope analyses suggest that adult blue catfish in these systems are apex predators that feed extensively on important fishery resources, including anadromous shads and herrings Alosa spp. and juvenile Atlantic menhaden <em>Brevoortia tyrannus</em>. Minimizing effects on Chesapeake Bay communities by controlling high densities of blue catfish populations is a primary goal of management, but conflicting demands of the commercial and recreational sectors must be resolved. Further, low market demand and human consumption concerns associated with purported accumulation of contaminants in blue catfish pose additional complications for regulating these fisheries.

scholarly journals Viable gut passage of cyanobacteria through the filter-feeding fish Atlantic menhaden, Brevoortia tyrannus

2005 ◽  
Vol 27 (7) ◽  
pp. 715-718 ◽  
Author(s):  
Kevin D. Friedland ◽  
Dean W. Ahrenholz ◽  
Leonard W. Haas
Keyword(s):  
Atlantic Menhaden ◽  
Filter Feeding ◽  
Brevoortia Tyrannus ◽  
Gut Passage ◽  
Viable Gut Passage

scholarly journals Factors affecting the abundance of age-0 Atlantic menhaden (Brevoortia tyrannus) in Chesapeake Bay

2016 ◽  
Vol 73 (9) ◽  
pp. 2238-2251 ◽  
Author(s):  
Edward D. Houde ◽  
Eric R. Annis ◽  
Lawrence W. Harding ◽  
Michael E. Mallonee ◽  
Michael J. Wilberg
Keyword(s):  
Environmental Factors ◽  
Primary Production ◽  
Chesapeake Bay ◽  
Primary Productivity ◽  
Atlantic Menhaden ◽  
Strongly Correlated ◽  
Brevoortia Tyrannus ◽  
Factors Affecting ◽  
Chl A ◽  
Low Levels

Abstract The abundance of prerecruit, age-0 Atlantic menhaden (Brevoortia tyrannus), declined to low levels in Chesapeake Bay in the 1990s, after two decades of high abundances in the 1970s–1980s. Environmental factors and trophodynamics were hypothesized to control age-0 menhaden abundance. Data on age-0 menhaden abundance from seine and trawl surveys were analysed with respect to primary productivity, chlorophyll a (Chl a), and environmental variables. Abundance from 1989 to 2004 was strongly correlated with metrics of primary production and euphotic-layer Chl a, especially during spring months when larval menhaden transform into filter-feeding, phytoplanktivorous juveniles. Correlation, principal components, and multiple regression analyses were conducted that identified factors associated with age-0 menhaden abundance. Primary production, Chl a, and variables associated with freshwater flow, e.g. Secchi disk depth and zooplankton assemblages, were correlated with age-0 menhaden abundance. Lengths of age-0 menhaden were positively related to mean levels of annual primary production. However, lengths were negatively related to age-0 menhaden abundance, indicating that growth may be density-dependent. The identified relationships suggest that numbers of menhaden larvae ingressing to Chesapeake Bay and environmental factors that subsequently control primary productivity and food for juveniles within the Bay may control recruitment levels of Atlantic menhaden.

Diets of Juvenile Atlantic Menhaden (Brevoortia tyrannus) in Three Estuarine Habitats as Determined from Fatty Acid Composition of Gut Contents

1975 ◽  
Vol 32 (5) ◽  
pp. 587-592 ◽  
Author(s):  
H. Perry Jeffries
Keyword(s):  
Fatty Acids ◽  
Organic Matter ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Particulate Organic Matter ◽  
Alimentary Canal ◽  
Atlantic Menhaden ◽  
Gut Contents ◽  
Brevoortia Tyrannus ◽  
Fatty Acid Compositions

Juvenile Atlantic menhaden (Brevoortia tyrannus) feed on zooplankton and particulate organic matter, but the importance of each material in the diet cannot be visually determined, because food is ground to an amorphous paste in the fish’s gizzard-like stomach. During early digestion in the anterior alimentary canal, fatty acids do not appear to change significantly, at least with respect to relative concentrations of saturated and unsaturated groups. Because zooplankton and particulate organic matter have markedly different fatty acid compositions, a hypothetical mixture of the two components can be calculated that best accounts for the observed fatty acid distributions of gut contents. Decreasing reliance on zooplankton, from bay through river to marsh, probably reflects resource abundances in three habitats and demonstrates adaptability of juvenile menhaden to different food supplies.

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