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

Jacquemin, Stephen J.; Pyron, Mark

doi:10.1643/ci-13-022

Cited by 7 publications

(6 citation statements)

References 42 publications

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“…Sexual dimorphism between male and female individuals provides an additional source of morphological variation. Although not necessarily independent of ontogenic changes, as many species do not diverge in morphology until reaching sexual maturity (Jacquemin & Pyron 2013), sexual dimorphism is widespread among many organisms and suggests that variation between sexes is a result of adaptation (Shine 1989). Describing shape variation between male and female individuals can provide valuable information on the mechanisms present in reproductive processes.…”

Section: Introductionmentioning

confidence: 99%

Evidence of morphological and functional variation among BluegillLepomis macrochiruspopulations across Grand Lake St Mary's watershed area

Bell

Jacquemin

2017

Journal of Freshwater Ecology

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A myriad of factors have been shown to influence the morphology of freshwater fish. However, studies that parse out where variation is coming from (e.g. body size, sex, and habitat) as well as what potential these changes have to influence function (e.g. swimming performance) are understudied. Therefore, the objectives of this study were to describe morphological variation of Bluegill Lepomis macrochirus across the Grand Lake St Mary's watershed area (northwest OH, USA) and test for covariation of morphology with size, sex, and habitat as well as to assess swimming performance to discern whether any differences in habitat (and morphology) correspond with functional aspects related to critical swimming velocity. Geometric morphometric methods were used to assess shape variation among individuals and general linear models were used to test for covariation of morphology with size, sex, and habitat. Analyses indicated that body size was the strongest driver of morphological variation followed by sex, habitat, and interactionsindicating the presence of allometry, sexual dimorphism, and the potential for habitat induced plasticity. In general, more robust morphologies tended to correspond with larger individuals, males, and/or individuals from lentic habitats. Swimming performance trials supported functional differences as individuals from lotic habitats demonstrated significantly higher U crit swimming performance values (»+20%) than lentic individuals. Broader applications of these findings can link to evolutionary ecology, management, and conservation.

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Section: Introductionmentioning

confidence: 99%

Evidence of morphological and functional variation among BluegillLepomis macrochiruspopulations across Grand Lake St Mary's watershed area

Bell

Jacquemin

2017

Journal of Freshwater Ecology

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“…The same results were observed by Vasiliou & Economidis (2005) in similar species: B. peloponesius (Valenciennes, 1842) and B. cyclolepis (Heckel, 1837). The larger body and greater abdominal region are likely a result of selection for increased fecundity in females (Jacquemin & Pyron, 2014). Sexual dimorphism may also arise due to natural selection operating differentially on the sexes (Lostrom et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

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Radojković¹,

Marinović²,

Milošković³

et al. 2019

Turk. J. Fish. Aquat. Sci.

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In the present study, landmark-based geometric morphometrics was applied to compare and visualize the overall size and shape variation, sexual size and shape dimorphism of the species Barbus balcanicus Kotlík, Tsigenopoulos, Ráb & Berrebi from different fragmented localities. The body shape of the fish was significantly different both for sex and locality. Also, body size significantly differed between sexes, with females being generally larger than males. This study also proved significant differences in body shape between populations from different localities. Considering that the environmental conditions of the localities were not greatly different from each other, the morphological divergence that was observed may be partly attributed to stream damming, which acts as a stressor, permanently altering the systems and shifting them into new ecological frameworks.

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“…The species is widely distributed in North America, from southern Canada, through USA and Mexico up to Guatemala, in Central America (Chao, 2002;Sluss & Harrel, 2006). In spite of its wide distribution, only A. grunniens from northernmost populations inhabiting temperate zones have been subject of study, resulting in several studies about a range of topics such as diet, re-__________________ Corresponding editor: Enrique Dupré production, sexual dimorphism, growth, age and morphological variations among river ecosystems (Daiber, 1952;Rypel, et al, 2006;Rypel, 2007;Davis-Foust et al, 2009;Jacquemin & Pyron, 2013;Jacquemin et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Reproductive cycle of Aplodinotus grunniens females (Rafinesque, 1819) in the Usumacinta River, Mexico

Hernández-Gómez

Contreras-Sánchez

Hernández‐Franyutti

et al. 2019

LAJAR

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The freshwater drum Aplodinotus grunniens is a species widely distributed in North America. In the Mexican southeast, this species occurs in the Usumacinta River, where it supports an artisanal fishery. In this regard, the present study was conducted to supply detailed information on the female reproductive cycle of this species. Calculations of gonadosomatic (GSI) and hepatosomatic (HSI) indexes, histological and visual staging of ovaries as well as the staging of oocyte development were applied together to determine the reproductive changes during an annual cycle. The histological analysis revealed the presence of spawning capable females throughout the year, and the distribution frequencies of oocyte diameters displayed the continuous occurrence of mature oocytes, with great data dispersion and different modal groups. These observations were further corroborated by the presence of alternating peaks and drops in the GSI and HSIs, which were correlated with the occurrence of maturing and spawned females. These data, taken together, reveal that A. grunniens from the Usumacinta River is a partial spawner with asynchronous ovarian development and undetermined fecundity that reproduces year-round, but with spawning occurring preferably during the rainfallflooding season (June to November). The Usumacinta River seems to be a permanently favorable environment for sheltering, feeding and growth of A. grunniens broods, especially during the flooding season. The information generated in this study will be useful for the development of management strategies in the wild as well as for the exploration of A. grunniens as a potential species for aquaculture production in southern Mexico.

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

Cited by 7 publications

References 42 publications

Evidence of morphological and functional variation among BluegillLepomis macrochiruspopulations across Grand Lake St Mary's watershed area

Evidence of morphological and functional variation among BluegillLepomis macrochiruspopulations across Grand Lake St Mary's watershed area

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Reproductive cycle of Aplodinotus grunniens females (Rafinesque, 1819) in the Usumacinta River, Mexico

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