Morphological Variability Between Wild Populations and Inbred Stocks of a Chinese Minnow, Gobiocypris rarus

Shao, Yan; Wang, Jianwei; Qiao, Yunfeng; He, Yongtao; Cao, Weiguo

doi:10.2108/zsj.24.1094

Cited by 22 publications

(14 citation statements)

References 55 publications

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“…In addition to the eventualities of unfit generations, the inbred populations might further experience genetic drift which might influence the phonotypic traits and hence shape variations. Shao et al (2007) reported significant morphological variation in inbred stocks of Chinese Minnow, Gobiocypris rarus. It should be noted that, although overfishing crosscuts in EA water bodies, significant fish overexploitation and accumulation of heavy metals (copper, zinc, cobalt and nickel) have been reported in L. George (Kamanyi 1996;Lowe-McConnell 2010) and (Swaibuh Lwanga et al 2003) respectively.…”

Section: Discussionmentioning

confidence: 99%

Anthropogenic impacts on the contextual morphological diversification and adaptation of Nile tilapia (Oreochromis niloticus, L. 1758) in East Africa

et al. 2018

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Nile tilapia occurs naturally in East Africa where it's an economically important species. Many of the natural populations of Nile tilapia have been affected by anthropogenic activities including translocations, associated with programmes aimed at enhancing capture fisheries and aquaculture productivity. Using geometric morphometric analyses, we tested the hypothesis that such anthropogenic activities have augmented admixture among natural populations of Nile tilapia and influenced the geographical distribution of morphological variation within the species. Our expectation was that Nile tilapia shape divergent might be consistent with reportedly anthropogenic activities in nonnative environments. To test this hypothesis, we analyzed the shapes of 490 individuals from thirteen populations; three farms, six natives and four nonnative natural populations. Our analysis revealed that the most pronounced shape diversification was observed in seven populations; three nonnatives (Victoria, Kyoga and Sindi farm) and four natives (Albert, River Nile, George and Turkana). The features responsible for the observed morphotypes were mainly related to the orientation of the anterior region of the fish and may be due to diversifying selection in response to new environmental pressures (for nonnative populations), admixture or drift. Shape change in the nonnative high-altitude populations was unexpectedly conserved, suggesting recent introductions which may have not resulted in admixture or there was strong selection against change in the traits measured. On the other hand, the recorded morphotypic clusters explained the possible genetic link to their putative ancestral home. Our results were partially consistent with our prediction that the nonnative populations exhibited divergent morphotypes. We recommend further investigations with molecular genetics for followup of these findings.

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Section: Discussionmentioning

confidence: 99%

Anthropogenic impacts on the contextual morphological diversification and adaptation of Nile tilapia (Oreochromis niloticus, L. 1758) in East Africa

et al. 2018

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“…Image analysis systems played a major role in the development of morphometric techniques, boosting the utility of morphometric research. The characteristics may be more applicable for studying short term, environmentally induced disparities, stock identification [9,10], species differences, practical morphology and improved fisheries management [11].…”

Section: Methodsmentioning

confidence: 99%

“…(Properly calibrated coordinates of morphometric locations, or landmarks', are generally more efficient and precise than manual distance measurements. Truss networks' of distances between landmarks coordinates provide more comprehensive coverage of form for greater discriminating power [9,10]. Image analysis systems also allow more advanced geometric morphometrics, which include outline methods and landmark methods [29].…”

Section: Image Analysis Morphormetric Methodsmentioning

confidence: 99%

Advanced Techniques for Morphometric Analysis in Fish

To¹,

Anumudu²

2015

J Aquac Res Development

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Information on the biology and population structure of any species is a prerequisite for developing management and conservation strategies. Morphometric characters of fish are the measurable characters common to all fishes. Some arbitrarily selected points on a fish body known as landmarks help the individual fish shape to be analyzed. A landmark is a point of correspondence on an object that matches between and within populations. Advanced techniques for morphometric analysis offers more efficient and powerful tools in identify differences between fish populations, detecting differences among groups and to differentiate between species of similar shape. Morphometric methods such as univariate comparisons, bivariate analyses of relative growth pattern and a series of multivariate methods have been developed and applied to discriminate stocks. The use of multivariate techniques such as principal components and discriminant analyses to quantify morphometric variables are also receiving increased attention in stock identification. Some of the advanced techniques developed for morphometric analysis in fish population are Truss network measurement, Image analysis-Univarite, Bivariate, and Multivariate, Principal Component Analysis (PCA).

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“…In freshwater fishes, the contribution of environment to morphological variation through phenotypic plasticity can be significant (Svanback & Eklov, 2002; Binning & Chapman, 2010) and has been demonstrated by comparing wild and inbred stocks (Shao et al , 2007) as well as by rearing wild individuals in different habitats or with different types of prey (Robinson & Wilson, 1996; Mittelbach et al , 1999; Peres‐Neto & Magnan, 2004). It has been hypothesized that morphological plasticity can explain differences among native and introduced populations (Bhagat et al , 2006; Vila‐Gispert et al , 2007).…”

Section: Introductionmentioning

confidence: 99%

Morphological variation between non‐native lake‐ and stream‐dwelling pumpkinseed Lepomis gibbosusin the Iberian Peninsula

Naspleda

Vila‐Gispert

Fox

et al. 2012

Journal of Fish Biology

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The objective of this study was to test if morphological differences in pumpkinseed Lepomis gibbosus found in their native range (eastern North America) that are linked to feeding regime, competition with other species, hydrodynamic forces and habitat were also found among stream- and lake- or reservoir-dwelling fish in Iberian systems. The species has been introduced into these systems, expanding its range, and is presumably well adapted to freshwater Iberian Peninsula ecosystems. The results show a consistent pattern for size of lateral fins, with L. gibbosus that inhabit streams in the Iberian Peninsula having longer lateral fins than those inhabiting reservoirs or lakes. Differences in fin placement, body depth and caudal peduncle dimensions do not differentiate populations of L. gibbosus from lentic and lotic water bodies and, therefore, are not consistent with functional expectations. Lepomis gibbosus from lotic and lentic habitats also do not show a consistent pattern of internal morphological differentiation, probably due to the lack of lotic-lentic differences in prey type. Overall, the univariate and multivariate analyses show that most of the external and internal morphological characters that vary among populations do not differentiate lotic from lentic Iberian populations. The lack of expected differences may be a consequence of the high seasonal flow variation in Mediterranean streams, and the resultant low- or no-flow conditions during periods of summer drought.

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Morphological Variability Between Wild Populations and Inbred Stocks of a Chinese Minnow, Gobiocypris rarus

Cited by 22 publications

References 55 publications

Anthropogenic impacts on the contextual morphological diversification and adaptation of Nile tilapia (Oreochromis niloticus, L. 1758) in East Africa

Anthropogenic impacts on the contextual morphological diversification and adaptation of Nile tilapia (Oreochromis niloticus, L. 1758) in East Africa

Advanced Techniques for Morphometric Analysis in Fish

Morphological variation between non‐native lake‐ and stream‐dwelling pumpkinseed Lepomis gibbosusin the Iberian Peninsula

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