Changes in Phenotype and Genotype of Austrian Salmo trutta Populations during the Last Century

Lahnsteiner, Franz; Jagsch, Albert

doi:10.1007/s10641-005-4420-9

Cited by 15 publications

(18 citation statements)

References 24 publications

(31 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These procedures cause shrinkage of the specimens (Fox, 1996). Because all specimens were treated in a similar manner and the morphometric parameters were transformed in relation to SL, this method of conservation did not influence the investigation (Lahnsteiner and Jagsch, 2005).…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Morphological differentiation within the population of Siah Mahi,Capoeta capoeta gracilis, (Cyprinidae, Teleostei) in a river of the south Caspian Sea basin: a pilot study

Samaee

Patzner

Mansour

2009

Journal of Applied Ichthyology

View full text Add to dashboard Cite

Siah Mahi, Capoeta capoeta gracilis, is a predominant fish in the river systems of the south Caspian Sea basin. Although there is evidence of the geographical divergence of this taxon, no information is available on morphological differences within the subspecies populations. The study was designed to evaluate this differentiation in the Shirud River system of the south Caspian Sea basin in Iran. A total of 120 fish specimens ( ‡ 180 mm) were collected from the Shirud River; 33 morphometric and 10 meristic characteristics were recorded for each specimen. The standardized data were subjected to a principal component analysis (PCA) and variables with eigenvector ‡ 0.74 used as input for analysis of clustering, which grouped the 120 fish specimens into five distinct clusters. The overall random assignment of individuals into their original groups was high (86.7%), indicating that these specimens are highly divergent from each other. The proportion of individuals correctly classified into their original groups was 90, 81.8, 85.7, 100 and 76% for groups 1, 2, 3, 4 and 5, respectively. There were significant differences in nine morphometic characteristics among the five multivariate groups. Pectoral-anal length was the only characteristic that, based on all possible pair combinations of the five groups, could be individually distinguishable. With regard to meristic characteristics, a Kruskal-Wallis test showed that there were no significant differences among medians of the five multivariate groups.

show abstract

Section: Methodsmentioning

confidence: 99%

“…To keep the morphological error constant, all measurements were applied by the same investigator. Widths of the pectoral, ventral, and anal fins were evaluated after they had been spread to their maximal extension as recommended by Lahnsteiner and Jagsch (2005).…”

Section: Methodsmentioning

confidence: 99%

Morphological differentiation within the population of Siah Mahi,Capoeta capoeta gracilis, (Cyprinidae, Teleostei) in a river of the south Caspian Sea basin: a pilot study

Samaee

Patzner

Mansour

2009

Journal of Applied Ichthyology

View full text Add to dashboard Cite

show abstract

“…Most of these, however, have sought to distinguish between distinct subpopulations or subspecies, as the species is highly variable across its range (e.g. Ferguson & Taggart 1991; Lahnsteiner & Jagsch 2005; Simonović et al. 2007; Hermida et al.…”

Section: Introductionmentioning

confidence: 99%

Morphological variability of Atlantic salmon Salmo salar and brown trout Salmo trutta in different river environments

Drinan

McGinnity

Coughlan

et al. 2012

Ecology of Freshwater Fish

View full text Add to dashboard Cite

– The morphologies of sympatric juvenile Atlantic salmon Salmo salar parr and brown trout Salmo trutta parr were compared between Irish rivers with contrasting hydraulic environments – a high‐gradient and a low‐gradient tributary from the River Barrow catchment, south‐east Ireland and a high‐gradient river from the Burrishoole catchment, west of Ireland. The two catchments differ markedly in mean annual precipitation (849.0 mm year−1 and 1370.3 mm year−1 for the Barrow and Burrishoole catchments, respectively). Parr of both species demonstrated morphological variation between and within catchments. Changes in metrics such as pectoral fin length, body depth and body length between and within catchments suggest that hydraulic forces were a major determinant of morphological variation. Both species from the Burrishoole catchment had relatively larger pectoral fins, longer heads, larger eyes and shallower bodies than conspecifics from the Barrow catchment. In rivers subject to frequent rainfall‐driven high discharges, such as those in the Burrishoole catchment, a more fusiform body and head shape coupled with larger pectoral fins may reduce the energetic cost of maintaining position in the water column, as well as increase stability and manoeuvrability. The larger eyes in both parr species in the Burrishoole catchment could further be a response to the lower visibility of the more turbid and peat‐stained waters or to the reduced prey availability. The results of this study demonstrate that local adaptation to flow conditions can yield morphologically distinct populations and that multiple species can exhibit parallel phenotypic responses to changing environmental conditions.

show abstract

“…All the measurements were carried out using ImageJ 1.x (Schneider et al, 2012). To remove the effect of fish size on the data, all of the measurements were standardized as a function of the urohyal length (Lahnsteiner & Jagsch, 2005). Therefore, the values of selected measured morphometric parameters (=Mmp) were standardized by using the urohyal length (i.e.…”

Section: Urohyal Bone Description and Measurementmentioning

confidence: 99%

Comparative morphology of urohyal bone in brackish water species of the genus Aphanius Nardo, 1827 in the Persian Gulf and Southeastern Mediterranean Sea basins (Teleostei: Aphaniidae)

2018

View full text Add to dashboard Cite

Among the skeletal elements in fishes, the urohyal bone which lies in the lower part of the head - the central part of the mandibular skeleton- has proved to be of special significance in fish systematics. The urohyal bone is considered to be a synapomorphic structure in teleostean fish. The urohyal bone of six brackish water Aphanius species (i.e., Aphanius hormuzensis, A. stoliczkanus, A. furcatus, A. ginaonis, A. mento, A. sirhani) was compared using morphological description and linear measurements to explore the effectiveness of urohyal bone morphology in the separation of the Aphanius species. Description of the urohyal bones and their morphological variation allowed identification of the A. furcatus, A. mento and A. sirhani from their relatives. Moreover, the UH.UL separates significantly A. dispar and A. ginaonis, and the MH.UL discriminates significantly A. mento from others studied relatives. Discriminant function analysis (DFA) separated the studied species with high classification success (overall mean 94.7%). These results suggest the power of urohyal bone morphology in separating of the Aphanius species analyzed, and highlighting the taxonomic value of the urohyal bone. By considering the phylogenetic relationships among the studied species, it can be concluded that the observed variation in their urohyal morphology is largely consistent with their phylogeny. This indicated that at least some morphological characters in the shape of urohyal bone in Aphanius are encoded probably by genetic factors, which can be used for species discrimination.

show abstract

Changes in Phenotype and Genotype of Austrian Salmo trutta Populations during the Last Century

Cited by 15 publications

References 24 publications

Morphological differentiation within the population of Siah Mahi,Capoeta capoeta gracilis, (Cyprinidae, Teleostei) in a river of the south Caspian Sea basin: a pilot study

Morphological differentiation within the population of Siah Mahi,Capoeta capoeta gracilis, (Cyprinidae, Teleostei) in a river of the south Caspian Sea basin: a pilot study

Morphological variability of Atlantic salmon Salmo salar and brown trout Salmo trutta in different river environments

Comparative morphology of urohyal bone in brackish water species of the genus Aphanius Nardo, 1827 in the Persian Gulf and Southeastern Mediterranean Sea basins (Teleostei: Aphaniidae)

Contact Info

Product

Resources

About