Analysis of Morphology and Asymmetry in Bluegill Sunfish (Lepomis macrochirus) in the Southeastern United States

Felley, James D.

doi:10.2307/1444130

Cited by 62 publications

(59 citation statements)

References 27 publications

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“…The FA observed in both the gill rakers and filaments of L. ogunensis agreed with earlier studies involving fish species from different water bodies (Felley 1980, Bengtsson et al 1985, Graham et al 1993, Sowunmi 2004 where varying degrees of FA were observed in response to environmental stress. Our results were able to compare asymmetry in two structures: gill rakers and filaments, on the same bilateral organ.…”

Section: Discussionsupporting

confidence: 90%

“…Fluctuating asymmetry reflects the inability of the organism to perfectly control its development and this has been proposed as a measure of developmental stability (Van Valen 1962, Felley 1980. The FA observed in both the gill rakers and filaments of L. ogunensis agreed with earlier studies involving fish species from different water bodies (Felley 1980, Bengtsson et al 1985, Graham et al 1993, Sowunmi 2004 where varying degrees of FA were observed in response to environmental stress.…”

Section: Discussionsupporting

confidence: 73%

“…Our results were able to compare asymmetry in two structures: gill rakers and filaments, on the same bilateral organ. This differs greatly from the common practice, of similar organs at different parts of the body as observed in studies using fins (Felley 1980, Bengtsson et al 1985.…”

Section: Discussionmentioning

confidence: 70%

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Gill asymmetry in <i>Labeo ogunensis from Ogun river, Southwest Nigeria

Ayoade

Sowunmi

Nwachukwu

2014

RBT

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Fluctuating asymmetry (FA), often used as indicator of environmental stress, was evaluated in gill rakers and filaments of Labeo ogunensis from Ogun river, Southwest Nigeria. Mean length and weight of 13.68+1.28 cm and 59.40+17.48 g were respectively recorded. The gill rakers (t = -0.919) and filaments (t = -1.150) from both sides were not significantly different. The gill filaments recorded (0.31+2.42) higher incidence of fluctuating asymmetry (FA) compared with the gill rakers (0.21+1.58), signifying developmental interference in the population. Fish size and sex were observed to exert minimal influence on FA.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 73%

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Gill asymmetry in <i>Labeo ogunensis from Ogun river, Southwest Nigeria

Ayoade

Sowunmi

Nwachukwu

2014

RBT

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“…Actual studies have given conflicting results. As an example, Felley (1980) investigated a zone of secondary species contact in blue gill sunfish and found no evidence of lowered developmental homeostasis, but Graham and Felley (1985) found that more recently introgressed populations of centrarchids had higher FA levels than either of the parental populations.…”

Section: Introductionmentioning

confidence: 99%

Lopsided Fish in the Snake River Basin — Fluctuating Asymmetry as a way of Assessing Impact of Hatchery Supplementation in Chinook Salmon, Oncorhynchus tshawytscha

Johnson

Neely

Waples

2004

Environmental Biology of Fishes

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SynopsisThe use of developmental instability (an individual's failure to produce a consistent phenotype in a given environment) was evaluated to detect the effects of outplanting hatchery fish on wild salmon. Juvenile chinook salmon were collected in 1989, 1990, and 1991 from five drainages in the Snake River Basin. In each drainage we attempted to collect fish from streams with no hatchery supplementation (wild), naturally spawning fish from streams with hatchery supplementation (natural), and fish collected at a hatchery. Forty fish were collected per site and the number of elements in bilateral characters were counted on each side of the fish. Indices of fluctuating asymmetry (FA), a measure of minor, random deviations in perfect symmetry of bilateral counts, were calculated as an estimator of developmental instability. Analysis of character counts from seven paired characters revealed normal distributions. Only one of the characters displayed counts that were statistically larger on one side than the other, indicating that directional asymmetry (DA) or antisymmetry was not a major bias of FA. However, the means of all individual characters revealed a non-statistically significant left side bias. We analyzed our data using two indices of FA (FA1 and FA5) with different levels of sensitivity to DA. Differences in both FA indices were found among years, with collection sites in 1989 having significantly larger FA values than in 1991 (FA p < 0.01). Levels of FA among wild, natural, and hatchery fish were comparatively small (FA1 p = 0.17). This suggests developmental conditions were different in the first year of the study than in the last. The cause of these differences may be linked to either genetic or environmental variation or to gene-environment interactions, but the general population declines of salmon that occurred during this time obscures more specific conclusions.

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“…Such hybridization studies have shown both increased (Zakharov, 1981;Graham and Felley, 1985;Leary et aI., 1985) and decreased (Mather, 1953;Reeve, 1960;Leamy, 1984;Ferguson, 1986) levels of FA in F 1 hybrids when compared with parental strains. Others have shown no consistent pattern (Thoday, 1955;Jackson, 1973;Felley, 1980).…”

mentioning

confidence: 97%

THE GENETIC BASIS OF DEVELOPMENTAL STABILITY INAPIS MELLIFERA:HETEROZYGOSITY VERSUS GENIC BALANCE

1992

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Abstract. -The genetic basis for developmental stability in the haplo-diploid honeybee Apis mellifera was determined by comparing the level of asymmetry between diploid females and haploid males both among and within inbreeding levels. There was no significant relationship between the level ofinbreeding and the level offluctuating asymmetry for both females and males. It is therefore argued that the general level of genomic heterozygosity is not an important factor for the determination and maintenance of developmental stability in this system, but rather that the balance of genes within chromosomes plays the major role. The observation that males were generally more asymmetric than females suggests that developmental stability in females may also be influenced by additional factors such as gene dosage, sex-limited genes or cytoplasmic elements.

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Analysis of Morphology and Asymmetry in Bluegill Sunfish (Lepomis macrochirus) in the Southeastern United States

Cited by 62 publications

References 27 publications

Gill asymmetry in <i>Labeo ogunensis from Ogun river, Southwest Nigeria

Gill asymmetry in <i>Labeo ogunensis from Ogun river, Southwest Nigeria

Lopsided Fish in the Snake River Basin — Fluctuating Asymmetry as a way of Assessing Impact of Hatchery Supplementation in Chinook Salmon, Oncorhynchus tshawytscha

THE GENETIC BASIS OF DEVELOPMENTAL STABILITY INAPIS MELLIFERA:HETEROZYGOSITY VERSUS GENIC BALANCE

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