ECOLOGICAL FACTORS IN SPECIATION OF <i>PEROMYSCUS</i>

Blair, W. Frank

doi:10.1111/j.1558-5646.1950.tb01396.x

Cited by 75 publications

(47 citation statements)

References 32 publications

(26 reference statements)

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“…Conversely, arboreal adaptations in P. m. bairdi, usually found where little woody vegetation is present, are not as strongly developed. The woodland subspecies P. m. gracilis is similar to P. leucopus, and has the same arboreal adaptations, long tail and large feet, and a greater tail to body length ratio (Blair 1950).…”

Section: Discussionmentioning

confidence: 99%

Mensular discrimination between sympatric Peromyscus leucopodus and Peromyscus maniculatus in southern Illinois

Sternburg¹,

Feldhamer²

1997

Acta Theriol.

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. 1997. Mensural discrimination between sympatric Peromyscus leucopus and P. maniculatus in southern Illinois. Acta Theriologica 42: 1-13.A total of 383 Peromyscus was collected from southern Illinois to determine morphological characteristics useful in identifying individuals as either P. leucopus (Rafinesque, 1818) or P. maniculatus (Wagner, 1845). Polyacrylamide gel electrophoresis of salivary amylase was used to positively identify all specimens. No univariate morphological character accurately discriminated between the two species because of a high degree of intraspecific variation. Stepwise discriminant function analysis of external characters correctly classified 97.9% of subadults to species. The most important external character was the tail length/body length ratio. This ratio was also the most important factor in discrimination of adults; the function correctly classified 98.6% of individuals. Considering skull measurements of adults, 9 cranial characters were needed to differentiate between the two species, with a correct classification of 98.9%. For old adults, all specimens were classified correctly using 5 cranial characters. There was no fast, easy, accurate method to discriminate between these species 100% of the time in the field.

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Section: Discussionmentioning

confidence: 99%

Mensular discrimination between sympatric Peromyscus leucopodus and Peromyscus maniculatus in southern Illinois

Sternburg¹,

Feldhamer²

1997

Acta Theriol.

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“…Its subspecific taxonomy is complex (Schwartz, 1954;Bowen, 1968), with very pale forms on the Gulf beaches to dark-gray types inland. A number of theories concerning the origin and subsequent evolution of P. polionotus have been proposed (Blair, 1950;Bow en , 1968), and the species has been used as a classic illustration of various evolutionary processes (Sumner, 1929;D ice. 1940;H aldane, 1948).…”

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confidence: 99%

Chromosomal polymorphism in <i>Peromyscus polionotus</i>

Te¹,

Dawson²

1971

Cytogenet Genome Res

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Twenty-three oldfield mice, Peromyscus polionotus, representing six sources, were karyotyped. A structural polymorphism involving a moderately small pair of auto-somes was detected. This pair may be either acrocentric or bi-armed, resulting in karyograms showing 12, 12½, and 13 acrocentric pairs. The variation could be attributed to a single inversion widely distributed in the species. Minor structural variations in other autosomes also occurred. The karyotype of the F₁ interspecific hybrid of P. maniculatus x P. polionotus was examined. The hybrid had an acro-centric:bi-armed chromosome ratio intermediate to the parent species.

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“…Bowen (1968) has suggested that P. maniculatus bairdii gave rise to P. polionotus, whereas P. melanotis is morphologically more similar to P. maniculatus rufinus (Bowers, 1974). Blair (1950) and Lawlor (1974) also interpreted the origins of melanotis and polionotus from maniculatus as separate events. Additionally, electrophoretic data (Avise, pers.…”

Section: Discussionmentioning

confidence: 99%

“…Blair (1950), based on general ecological, morphological, and physiological characters, concluded that P. maniculatus represents the evolutionary stock from which the species melanotis, polionotus, sitkensis, selvini and sejugis were derived via peripheral isolation. To this list of peripheral species a sixth, oreas, is sometimes recognized (Lawlor, 1974).…”

Section: Discussionmentioning

confidence: 99%

“…This study was designed to yield additional data on the cytogenetics of three species of this complex in order to evaluate the "centrifugal speciation" model as a viable explanation of the evolutionary origin of the complex.Peromyscus melanotis and P. polionotus are believed to be peripheral isolates from the stock that evolved into the species P. maniculatus (Blair, 1950, Bowers et al, 1973. P. maniculatus is a widespread species occurring in a variety of habitats, whereas P. melanotis is a high montane species found in coniferous forest and P. polionotus is a deep sand species found in grassy fields at lower elevations near sea level (see Hooper, 1968, for general distribution of these three species).…”

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confidence: 99%

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CHROMOSOMAL EVOLUTION AND THE MODE OF SPECIATION IN THREE SPECIES OF PEROMYSCUS

1978

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The possibility that the Peromyscus maniculatus complex of deer mice arose via the process described as "centrifugal speciation" (Brown, 1957) has been discussed by Bowers et al., 1973, Lawlor, 1974, Baker et al., 1975, and Greenbaum et al., 1978. This study was designed to yield additional data on the cytogenetics of three species of this complex in order to evaluate the "centrifugal speciation" model as a viable explanation of the evolutionary origin of the complex.Peromyscus melanotis and P. polionotus are believed to be peripheral isolates from the stock that evolved into the species P. maniculatus (Blair, 1950, Bowers et al., 1973. P. maniculatus is a widespread species occurring in a variety of habitats, whereas P. melanotis is a high montane species found in coniferous forest and P. polionotus is a deep sand species found in grassy fields at lower elevations near sea level (see Hooper, 1968, for general distribution of these three species). It is probable that P. melanotis and P. polionotus are more closely related to P. maniculatus than they are to each other. Based on gross chromosome morphology, the karyotypes of P. polionotus and P. melanotis are more like each other than either is like the karyotypes of P. man iculatus. We have examined the G-banding and C-banding pattern of P. polionotus and compared it to the banding patterns of P. maniculatus and P. metanotis (Greenbaum et al., 1978) to determine whether this similarity in karyotype is reflected in homologous banding patterns or is a product of convergent evolution. If the chromosomal data for the species complex are to fit the centrifugal speciation model then the karyotypes of P. polionotus and P. melanotis must be most like the primitive condition and the karyotype of P. maniculatus must be the most derived. Additionally, the centrifugal speciation model would predict more chromosomal polymorphism and geographic variation in the "central stock" (P. maniculatus) and less in the peripheral isolates (P. polionotus and P. melanotis). Our study is designed to determine the chromosomal homologies in these species and thereby test the hypothesis that this group is the result of centrifugal speciation.

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ECOLOGICAL FACTORS IN SPECIATION OF PEROMYSCUS

Cited by 75 publications

References 32 publications

Mensular discrimination between sympatric Peromyscus leucopodus and Peromyscus maniculatus in southern Illinois

Mensular discrimination between sympatric Peromyscus leucopodus and Peromyscus maniculatus in southern Illinois

Chromosomal polymorphism in <i>Peromyscus polionotus</i>

CHROMOSOMAL EVOLUTION AND THE MODE OF SPECIATION IN THREE SPECIES OF PEROMYSCUS

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