Introgressive Hybridization and the Evolution of Lake-Adapted Catostomid Fishes.

Hybridization has been identified as a significant factor in the evolution of plants as groups of interbreeding species retain their phenotypic integrity despite gene exchange among forms. Recent studies have identified similar interactions in animals; however, the role of hybridization in the evolution of animals has been contested. Here we examine patterns of gene flow among four species of catostomid fishes from the Klamath and Rogue rivers using molecular and morphological traits. Catostomus rimiculus from the Rogue and Klamath basins represent a monophyletic group for nuclear and morphological traits; however, the Klamath form shares mtDNA lineages with other Klamath Basin species (C. snyderi, Chasmistes brevirostris, Deltistes luxatus). Within other Klamath Basin taxa, D. luxatus was largely fixed for alternate nuclear alleles relative to C. rimiculus, while Ch. brevirostris and C. snyderi exhibited a mixture of these alleles. Deltistes luxatus was the only Klamath Basin species that exhibited consistent covariation of nuclear and mitochondrial traits and was the primary source of mismatched mtDNA in Ch. brevirostris and C. snyderi, suggesting asymmetrical introgression into the latter species. In Upper Klamath Lake, D. luxatus spawning was more likely to overlap spatially and temporally with C. snyderi and Ch. brevirostris than either of those two with each other. The latter two species could not be distinguished with any molecular markers but were morphologically diagnosable in Upper Klamath Lake, where they were largely spatially and temporally segregated during spawning. We examine parallel evolution and syngameon hypotheses and conclude that observed patterns are most easily explained by introgressive hybridization among Klamath Basin catostomids

The Ursinus Weekly, November 11, 1957

Sasha Siemal, big game hunter, to speak at Forum November 13 • Braille award to Ursinus graduate • Cannes prize film given on Nov. 14-16 • Dr. Staiger presents paper to Chemical Society • Girls sign bids; Sororities welcome 55 new sisters • Becker, Schumaker Ruby business managers • Rehearsals for Fall play begin; Ten little Indians a thriller • Founders Day ceremonies held; Dr. S. E. Mackey delivers address: 3 get bachelor, 5 get honorary degrees; Paisley, Beardwood, Stauffer are dedicated • Oriental dance proves successful • Dorms dedicated on Founders Day • Chi Alpha to hear talk on ministerial problems • Editorial: In appreciation • Par la Queue • It ain\u27t what, but who you know! • Letters to the editor • Bears lose third to Haverford; Dickerson makes lone touchdown • Soccermen fight back as Delaware and Drexel win • Belles win 4-3 over Gwynedd; Tie E. Stroudsburg • Miller discusses Asiatic religion at Nov. 6th Forum • SEAP to show film • Discipline, banquet at Xmas, topics of MSGA meeting • CAC plans for ice skating • Four profs elected in Collegeville and Schwenksvillehttps://digitalcommons.ursinus.edu/weekly/1393/thumbnail.jp

The Ursinus Weekly, December 9, 1957

Catherine Drinker Bowen to speak at Forum, Dec. 11th • Knight of nights senior ball to be held December 13 • Thirteen U.C. seniors to be included in 1958 Who\u27s who • French Club hears talk by member of resistance • Profs Dolman and Jones at registrars meeting • Sig Nu informal initiation • Messiah at Ursinus celebrates twentieth anniversary, Dec. 12th • UC to host group of area colleges • Ursinus poets included in college poetry anthology • Delta Pi holds formal initiation • Newman Club holds breakfast • Grads at Katherine Gibbs • Editorial: Congratulations! • Play review: Cyrano and The shirkers • Roland speaking • Fall play review: Ten little Indians • Girls\u27 swimming team begins practice for season • UC belles close hockey season with 4-0 victory • Bears bow in last game to Indians; Rogers makes t-d • Courtmen blast Rutgers, 67 to 52; Lose to P.C.P. in last minutes • Placement Office has job openings • Dr. Blumberger to address pre-medical society Dec. 9 • Seniors hear heads of business at banquet-discussion, Nov. 25th • Marine OCS for mid-year UC graduates announced • IRC meetings give armchair travels • Chi Alpha to hear Dr. Moss • Talk on faith healinghttps://digitalcommons.ursinus.edu/weekly/1395/thumbnail.jp

The Ursinus Weekly, March 24, 1958

F. Glauser new editor; Begins duties April 1st • Spring a myth as snow hits area • Naval officer to visit campus Tues. • Student-prof show climaxes Campus Chest drive Mar. 14 • Debaters defeat Villanova, Mar. 13 • Second Y Forum on art features talk on sculpture • Al Wilson elected SEAP president for SE Penna. • Committees and participants are named for \u2758 May Day pageant • Catherine Drinker Bowen to speak at Forum Wednesday • \u2759 Ruby editors name new staff • Mr. Walker to be panelist at teachers\u27 convention • Rowe candidate for scholarship • Editorial: Last but not least • Letters to the editor • Two Easter sonnets for our times • Badminton team wins five: To play Bryn Mawr Tues. • Ursinus baseball nine to open season April 10 • Tennis outlook fair; Clinics held • Belle\u27s basketball roundup: Tally 6 wins and 3 losses • Intramural b\u27ball won by Curtis I • MSGA reviews rules and penalties for infractionshttps://digitalcommons.ursinus.edu/weekly/1403/thumbnail.jp

The Ursinus Weekly, November 11, 1957

Sasha Siemal, big game hunter, to speak at Forum November 13 • Braille award to Ursinus graduate • Cannes prize film given on Nov. 14-16 • Dr. Staiger presents paper to Chemical Society • Girls sign bids; Sororities welcome 55 new sisters • Becker, Schumaker Ruby business managers • Rehearsals for Fall play begin; Ten little Indians a thriller • Founders Day ceremonies held; Dr. S. E. Mackey delivers address: 3 get bachelor, 5 get honorary degrees; Paisley, Beardwood, Stauffer are dedicated • Oriental dance proves successful • Dorms dedicated on Founders Day • Chi Alpha to hear talk on ministerial problems • Editorial: In appreciation • Par la Queue • It ain\u27t what, but who you know! • Letters to the editor • Bears lose third to Haverford; Dickerson makes lone touchdown • Soccermen fight back as Delaware and Drexel win • Belles win 4-3 over Gwynedd; Tie E. Stroudsburg • Miller discusses Asiatic religion at Nov. 6th Forum • SEAP to show film • Discipline, banquet at Xmas, topics of MSGA meeting • CAC plans for ice skating • Four profs elected in Collegeville and Schwenksvillehttps://digitalcommons.ursinus.edu/weekly/1393/thumbnail.jp

The Ursinus Weekly, November 18, 1957

Committees busy as Indians as Fall play opening nears • Final seminar on religions, Nov. 20 • Group production of homicidal thriller, Nov. 26 • Detweiler, Heckler elected to MSGA • Trip for pre-medders • Talk on South America • Seniors to hear business heads at ACES banquet, November 25th • 20th anniversary of Messiah, Dec. 12 • IRC hears hitch-hiking student speak of travels • Frenchman to tell of experiences in World War II, Tue. • Football finale • KDK welcomes new sisters • Editorial: Time for thought • Thanksgiving verses for our times • Her first and last try • Letters to the editor • Bears lose to Dutchmen 13 to 7; UC scores with 91 yard pass-run • UC wins two as girls top Beaver and Gettysburg • Lehigh bows to Ursinus 3-2; Bears break tie in the 4th • Four UC girls place on all-Phila. hockey team • Knight of nights to be theme of senior ball • S. Siemal speaks at Forum on jungle babies • Y to hear Dr. Moss speak at Forum on December 11 • American biographer to speak at Forum Dec. 11https://digitalcommons.ursinus.edu/weekly/1394/thumbnail.jp

The Ursinus Weekly, December 9, 1957

Catherine Drinker Bowen to speak at Forum, Dec. 11th • Knight of nights senior ball to be held December 13 • Thirteen U.C. seniors to be included in 1958 Who\u27s who • French Club hears talk by member of resistance • Profs Dolman and Jones at registrars meeting • Sig Nu informal initiation • Messiah at Ursinus celebrates twentieth anniversary, Dec. 12th • UC to host group of area colleges • Ursinus poets included in college poetry anthology • Delta Pi holds formal initiation • Newman Club holds breakfast • Grads at Katherine Gibbs • Editorial: Congratulations! • Play review: Cyrano and The shirkers • Roland speaking • Fall play review: Ten little Indians • Girls\u27 swimming team begins practice for season • UC belles close hockey season with 4-0 victory • Bears bow in last game to Indians; Rogers makes t-d • Courtmen blast Rutgers, 67 to 52; Lose to P.C.P. in last minutes • Placement Office has job openings • Dr. Blumberger to address pre-medical society Dec. 9 • Seniors hear heads of business at banquet-discussion, Nov. 25th • Marine OCS for mid-year UC graduates announced • IRC meetings give armchair travels • Chi Alpha to hear Dr. Moss • Talk on faith healinghttps://digitalcommons.ursinus.edu/weekly/1395/thumbnail.jp

The Ursinus Weekly, December 16, 1957

Banquet, dance and caroling highlight Ursinus yuletide • 20th anniversary Messiah thrills capacity audience • MSGA makes plans for next semester • Chi Alpha holds annual candlelight communion • Pi Nu Epsilon initiates three new members • Y commission hears talk by Dr. Moss at meeting • Bennignus, Martin reign over Knight of nights • Mrs. Rice talks on Swedish Christmas • Rosicrucians change name, rules and constitution • Sig Nu and Delta Pi hold annual Christmas party • Mardi Gras to be theme of Beta Sig dance Jan. 11 • Christmas spirit • Editorial: First Christmas • For the kiddies • What I have learned in college • Wrestling season opens January 11; Prutzman to lead • Soccer, football player statistics • Bears bow to Nat. Aggies, Crusaders in two thrillers • Soccer roundup for 1957 shows 3 wins, 9 losses • Library catalogs 50,000th volume • Marine officers to hold interviews • Campus problems topic at SCM conference week-end • Alpha Psi Omega to hold initiation ceremonyhttps://digitalcommons.ursinus.edu/weekly/1396/thumbnail.jp

The Ursinus Weekly, February 17, 1958

Sophomore, MSGA elections this Wednesday, Feb. 19th • March and April Forum speakers • Campus Chest to begin \u2758 drive • UC colors to be given freshman women, Feb. 20 • Sponsors Lenten service • Annual show by students, faculty set for March 14 • First speaker in art series, Feb. 26 • Eisenhower and rockets, subject of UC Forum speaker • Appeal received from Korean university officials for books • Lorelei features Bob Dale at Sunnybrook Friday night • Storm hits area; With snow drifting • Kupid-Kapers held Sat.; Snow affects Ape\u27s dance • Senior class to present play Gold in the hills • Chem. society makes trip • Frosh dance Tues. night • U.C. grad at duPont Co. • Editorial: Do unto others • Wasted hours • BPL progress report • Grapplers beat E\u27towners; Lose to Delaware Hens • UC belles splash Temple 43 to 23; Bow to W. Chester • Courtmen lose to Drexel, Haverford and Delaware • Badminton team opens season with winner, 5-0 • Belles gain experience in loss of opener Feb. 12 • Library lists new accessions • Red Cross bloodmobile coming here February 25 • Temple Univ. offers teachers\u27 art coursehttps://digitalcommons.ursinus.edu/weekly/1399/thumbnail.jp

The Ursinus Weekly, October 21, 1957

Presbyterian Society honors Dr. Armstrong • MSGA meeting; Complaints heard • Student teachers begin assignments Tues., Oct. 8 • SWC seminars on religions of world • Sputnik theme of soph dance • Dance, Ruby editors subject of junior meeting • Sig Nu holds luncheon • Omega Chi homecoming • \u2757 Homecoming bring grads back to Ursinus: Gayle Livingston \u2757 queen; Walker trophy to Famous • Infirmary busy as Ursinians battle flu infection • Faith healing discussion • Editorial: Medical staff salute • Was ist das? • About sophomore psychology • Ridiculing the fad • Letters to the editor • Speedball • Peterson named to All-East team for outstanding work • Rutgers nip UC; Booters beat grads in annual game • Famous receives Walker trophy at Wilkes game • First defeat for Ursinus as Colonels tame Bears 39 to 0 • Job opportunities announced by the Placement Bureau • KDK Homecoming banquet • Delta Pi Sigma banquethttps://digitalcommons.ursinus.edu/weekly/1391/thumbnail.jp