Effects of Allometry, Sex, and River Location on Morphological Variation of Freshwater Drum Aplodinotus grunniens in the Wabash River, USA

Copeia ◽  
2013 ◽  
Vol 2013 (4) ◽  
pp. 740-749 ◽  
Author(s):  
Stephen J. Jacquemin ◽  
Mark Pyron
Keyword(s):  
Morphological Variation ◽  
Wabash River ◽  
Aplodinotus Grunniens ◽  
Freshwater Drum

Wabash River Freshwater Drum Aplodinotus grunniens Diet: Effects of Body Size, Sex, and River Gradient

2013 ◽  
Vol 5 (1) ◽  
pp. 133-140 ◽  
Author(s):  
Stephen J. Jacquemin ◽  
Mark Pyron ◽  
Michael Allen ◽  
Lucas Etchison
Keyword(s):  
Body Size ◽  
Generalized Linear Model ◽  
Longitudinal Gradient ◽  
Diet Diversity ◽  
Diet Specialization ◽  
Wabash River ◽  
Aplodinotus Grunniens ◽  
Caddisfly Larvae ◽  
Freshwater Drum ◽  
Prey Items

Abstract The objectives of this study were to describe the diets of freshwater drum Aplodinotus grunniens in the Wabash River in the Midwestern United States. We used a multivariate ordination approach (nonmetric multidimensional scaling) to describe drum diets combined with a generalized linear model to test for covariation of diet with body size, sex, and longitudinal river gradient. Hydropsychidae (trichoptera, caddisfly larvae), pleuroceridae (gastropoda), and heptageniidae (ephemeroptera, mayfly larvae) were the most consumed prey items (∼75% of overall diets). Among all freshwater drum, hydropsychidae, pleuroceridae, and heptageniidae were present in 69%, 23%, and 38% of stomachs, respectively. Freshwater drum diets were similar along an upstream–downstream river gradient spanning 350 river km, but varied with body size and sex. Small- and medium-sized fish tended to consume more diptera and annelids compared with the largest individuals, which fed on mollusks and crayfish. With control for body size, the diets of male individuals were composed of more diptera (chironomidae) and annelid prey items compared with female individuals, whose diets included more molluscs and crayfish. Overall, we interpret the lack of diet diversity in freshwater drum with Wabash River longitudinal gradient as evidence of diet specialization. Alternatively, we propose that a potential dietary–river-gradient signal may be diluted as a function of increased freshwater drum longitudinal movements.

External morphology and internal anatomical characters of juveniles of the freshwater drum Aplodinotus grunniens

2018 ◽  
Vol 25 (6) ◽  
pp. 1161
Author(s):  
Haibo WEN ◽  
Xueyan MA ◽  
Pao XU ◽  
Bingqing ZHENG ◽  
Xinhua YUAN ◽  
...  
Keyword(s):  
External Morphology ◽  
Aplodinotus Grunniens ◽  
Anatomical Characters ◽  
Freshwater Drum

scholarly journals Reproductive biology of the freshwater drum Aplodinotus grunniens in Tabasco, Mexico

2017 ◽  
Vol 4 (11) ◽  
pp. 317
Author(s):  
Raúl Enrique Hernández-Gómez ◽  
Wilfrido Miguel Contreras-Sánchez ◽  
Martha Alicia Perera-García
Keyword(s):  
Reproductive Biology ◽  
Aplodinotus Grunniens ◽  
Freshwater Drum

The occurrence of Diplostomum spathaceum metacercariae in the freshwater drum, Aplodinotus grunniens

1989 ◽  
Vol 67 (11) ◽  
pp. 2853-2856 ◽  
Author(s):  
Gregory H. Leno ◽  
Harry L. Holloway Jr.
Keyword(s):  
Worm Burden ◽  
Infection Intensity ◽  
Female Fish ◽  
Body Width ◽  
Aplodinotus Grunniens ◽  
The North ◽  
Diplostomum Spathaceum ◽  
Significant Difference ◽  
Left And Right ◽  
Freshwater Drum

Strigeoid metacercariae from the lenses of freshwater drum, Aplodinotus grunniens, were morphometrically analyzed and compared with those of the North American subspecies of Diplostomum spathaceum: Diplostomum spathaceum indistinctum and Diplostomum spathaceum huronense. The metacercariae resembled D. s. indistinctum in mean body length, mean body width, oral sucker size, and holdfast size. Prevalence of infection in drum was 99% and intensity ranged from 0 to 260 worms per fish (mean ± SD = 35 ± 32). A significant difference (P < 0.05) in mean intensity between male and female fish was observed, with females harboring a greater worm burden (i.e., 43 in females versus 24 in males). Differences in infection intensity between left and right lenses from all fish were not significant (P > 0.05); however, the degree of asymmetry between left and right lenses of individual fish was highly significant (P < 0.005) according to heterogeneity χ2 analysis. In this case, neither left nor right lenses were consistently favored.

Dynamics and Species Interactions in the Commercial Fishery of the Red lakes, Minnesota

1992 ◽  
Vol 49 (2) ◽  
pp. 293-302 ◽  
Author(s):  
Donald L. Pereira ◽  
Yosef Cohen ◽  
George R. Spangler
Keyword(s):  
Species Interactions ◽  
Yellow Perch ◽  
Animal Feed ◽  
Age Distribution ◽  
Power Spectra ◽  
Commercial Fishery ◽  
Catch Per Unit Effort ◽  
Commercial Catch ◽  
Aplodinotus Grunniens ◽  
Freshwater Drum

The Red Lakes, Minnesota, have supported a commercial fishery for walleye (Stizostedion vitreum vitreum) and yellow perch (Perca flavescens) since 1917. Since 1972, harvests indicate increased variance in recruitment of percids and an increase in biomass of freshwater drum (Aplodinotus grunniens). We subjected commercial catch-per-unit-effort (CPUE) records of walleye, yellow perch, and animal feed (composed primarily of drum) to spectral analysis. Estimated power spectra displayed peaks at 8.5, 10, and 17 yr for walleye, yellow perch, and animal feed, respectively. Walleye and yellow perch CPUE time series were significantly coherent at periods ranging from 5to 10 yr, confirming the predator–prey relationship and common recruitment patterns of these two species. Interpretation of coherency between drum and the two percid species required knowledge of the age distribution of freshwater drum. The apparent exponential increase in drum biomass as indicated by commercial CPUE is primarily due to strong year classes in 1955, 1970, and 1983. While drum recruitment and growth are consistent with the periodicity in the autospectrum, we find little evidence from coherencies that drum recruitment is related to the dynamics of wlleye or perch populations.

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