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  1. Article ; Online: Specialized acquisition behaviors maintain reliable environmental transmission in an insect-microbial mutualism.

    Villa, Scott M / Chen, Jason Z / Kwong, Zeeyong / Acosta, Alice / Vega, Nicole M / Gerardo, Nicole M

    Current biology : CB

    2023  Volume 33, Issue 13, Page(s) 2830–2838.e4

    Abstract: Understanding how horizontally transmitted mutualisms are maintained is a major focus of symbiosis research. ...

    Abstract Understanding how horizontally transmitted mutualisms are maintained is a major focus of symbiosis research.
    MeSH term(s) Animals ; Symbiosis ; Plants ; Feces ; Heteroptera ; Bacteria
    Language English
    Publishing date 2023-06-28
    Publishing country England
    Document type Journal Article ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 1071731-6
    ISSN 1879-0445 ; 0960-9822
    ISSN (online) 1879-0445
    ISSN 0960-9822
    DOI 10.1016/j.cub.2023.05.062
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    Zs.A 3208: Show issues Location:
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  2. Article ; Online: EXPERIMENTAL INFECTION WITH A NATURALLY OCCURRING PROTOZOAN PARASITE REDUCES MONARCH BUTTERFLY (

    Babalola, Tolulope S / de Roode, Jacobus C / Villa, Scott M

    The Journal of parasitology

    2022  Volume 108, Issue 3, Page(s) 289–300

    Abstract: Parasitic infection is known to drive sexual selection in persuasive mating systems, where parasites influence the secondary sexual characteristics that underlie mate choice. However, comparatively little is known about their effects on animals that use ... ...

    Abstract Parasitic infection is known to drive sexual selection in persuasive mating systems, where parasites influence the secondary sexual characteristics that underlie mate choice. However, comparatively little is known about their effects on animals that use coercive mating behavior. We use a tractable system consisting of monarch butterflies and their naturally occurring parasite
    MeSH term(s) Animals ; Apicomplexa ; Butterflies ; Female ; Host-Parasite Interactions ; Male ; Parasites ; Reproduction
    Language English
    Publishing date 2022-06-27
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, N.I.H., Extramural
    ZDB-ID 300870-8
    ISSN 1937-2345 ; 0022-3395
    ISSN (online) 1937-2345
    ISSN 0022-3395
    DOI 10.1645/21-121
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  3. Article: Crowding does not affect monarch butterflies' resistance to a protozoan parasite.

    Alaidrous, Wajd / Villa, Scott M / de Roode, Jacobus C / Majewska, Ania A

    Ecology and evolution

    2022  Volume 12, Issue 4, Page(s) e8791

    Abstract: Host density is an important factor when it comes to parasite transmission and host resistance. Increased host density can increase contact rate between individuals and thus parasite transmission. Host density can also cause physiological changes in the ... ...

    Abstract Host density is an important factor when it comes to parasite transmission and host resistance. Increased host density can increase contact rate between individuals and thus parasite transmission. Host density can also cause physiological changes in the host, which can affect host resistance. Yet, the direction in which host density affects host resistance remains unresolved. It is also unclear whether food limitation plays a role in this effect. We investigated the effect of larval density in monarch butterflies,
    Language English
    Publishing date 2022-04-06
    Publishing country England
    Document type Journal Article
    ZDB-ID 2635675-2
    ISSN 2045-7758
    ISSN 2045-7758
    DOI 10.1002/ece3.8791
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  4. Article ; Online: Lack of inbreeding avoidance during mate selection in migratory monarch butterflies.

    Villa, Scott M / Kelly, Kieran P / Hollimon, Miles G / Protil, Karl J / de Roode, Jacobus C

    Behavioural processes

    2022  Volume 198, Page(s) 104630

    Abstract: Inbreeding is generally thought to have negative consequences for organismal health. However, despite the potential fitness effects, it remains surprisingly common among wild populations. In many cases, the complex factors that underlie mating dynamics ... ...

    Abstract Inbreeding is generally thought to have negative consequences for organismal health. However, despite the potential fitness effects, it remains surprisingly common among wild populations. In many cases, the complex factors that underlie mating dynamics make predicting whether individuals should or do avoid inbreeding quite challenging. One reason inbreeding may persist among species is that the likelihood of encountering relatives can be rare. Thus, even if inbreeding has severe consequences, selection to avoid mating with kin will be weak in species that are highly dispersed. Here we investigated if migratory monarch butterflies (Danaus plexippus), which are famous for their dispersal ability, actively avoid inbreeding. We found that neither female nor male monarchs choose mates based on relatedness. These results support the hypothesis that movement ecology can mask the deleterious effects of inbreeding and relax selection for active inbreeding avoidance behaviors. Overall, our data add to the growing list of studies showing that inbreeding avoidance is not the behavioral "default" for most species. We also highlight the implications that inbreeding may have on the declining populations of this iconic butterfly.
    MeSH term(s) Animals ; Butterflies/genetics ; Female ; Humans ; Inbreeding ; Male ; Marriage ; Reproduction
    Language English
    Publishing date 2022-04-02
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 196999-7
    ISSN 1872-8308 ; 0376-6357
    ISSN (online) 1872-8308
    ISSN 0376-6357
    DOI 10.1016/j.beproc.2022.104630
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    Zs.A 4104: Show issues Location:
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  5. Article ; Online: Pityriasis rubra pilaris: a bibliometric analysis.

    Villa, Natalie M / Seivright, Justine R / Worswick, Scott D / Shi, Vivian Y / Hsiao, Jennifer L

    International journal of dermatology

    2021  Volume 60, Issue 8, Page(s) e326–e331

    MeSH term(s) Bibliometrics ; Humans ; Pityriasis Rubra Pilaris
    Language English
    Publishing date 2021-02-20
    Publishing country England
    Document type Letter
    ZDB-ID 412254-9
    ISSN 1365-4632 ; 0011-9059 ; 1461-1244
    ISSN (online) 1365-4632
    ISSN 0011-9059 ; 1461-1244
    DOI 10.1111/ijd.15434
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  6. Article ; Online: Population-level impact of ibrutinib for chronic lymphocytic leukemia in British Columbia, Canada.

    Khelifi, Rania S / Huang, Steven J / Savage, Kerry J / Villa, Diego / Scott, David W / Ramadan, Khaled / Connors, Joseph M / Sehn, Laurie H / Toze, Cynthia L / Gerrie, Alina S

    Leukemia & lymphoma

    2023  Volume 64, Issue 6, Page(s) 1129–1138

    Abstract: Ibrutinib has dramatically changed the treatment landscape for chronic lymphocytic leukemia (CLL) since its availability in British Columbia (BC), Canada in 2014. We analyzed patterns of use and real-world survival outcomes in 370 patients who received ... ...

    Abstract Ibrutinib has dramatically changed the treatment landscape for chronic lymphocytic leukemia (CLL) since its availability in British Columbia (BC), Canada in 2014. We analyzed patterns of use and real-world survival outcomes in 370 patients who received ibrutinib for first-line (1 L,
    MeSH term(s) Humans ; Leukemia, Lymphocytic, Chronic, B-Cell/diagnosis ; Leukemia, Lymphocytic, Chronic, B-Cell/drug therapy ; Leukemia, Lymphocytic, Chronic, B-Cell/epidemiology ; British Columbia/epidemiology ; Piperidines/therapeutic use ; Adenine
    Chemical Substances ibrutinib (1X70OSD4VX) ; Piperidines ; Adenine (JAC85A2161)
    Language English
    Publishing date 2023-04-22
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1042374-6
    ISSN 1029-2403 ; 1042-8194
    ISSN (online) 1029-2403
    ISSN 1042-8194
    DOI 10.1080/10428194.2023.2199340
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    Zs.A 2997: Show issues Location:
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  7. Article ; Online: Frontline therapy with bendamustine rituximab (BR) and rituximab cyclophosphamide vincristine prednisone (RCVP) confers similar long-term outcomes in patients with treatment naïve Waldenström macroglobulinemia in a real-world setting: a population-based analysis.

    Kim, Jowon Laura / Gerrie, Alina S / Savage, Kerry Joane / Villa, Diego / Scott, David / Craig, Jeffrey W / Farinha, Pedro / Skinnider, Brian / Slack, Graham / Connors, Joseph M / Sehn, Laurie H / Venner, Christopher / Freeman, Ciara L

    Leukemia & lymphoma

    2023  Volume 65, Issue 3, Page(s) 346–352

    Abstract: We report on outcomes of 111 patients with treatment naïve Waldenström macroglobulinemia (TN WM) treated with frontline bendamustine-rituximab (BR) ( ...

    Abstract We report on outcomes of 111 patients with treatment naïve Waldenström macroglobulinemia (TN WM) treated with frontline bendamustine-rituximab (BR) (
    MeSH term(s) Humans ; Rituximab/adverse effects ; Waldenstrom Macroglobulinemia/diagnosis ; Waldenstrom Macroglobulinemia/drug therapy ; Waldenstrom Macroglobulinemia/etiology ; Bendamustine Hydrochloride/adverse effects ; Vincristine/adverse effects ; Prednisone/adverse effects ; Cyclophosphamide/adverse effects ; Antineoplastic Combined Chemotherapy Protocols/adverse effects
    Chemical Substances Rituximab (4F4X42SYQ6) ; Bendamustine Hydrochloride (981Y8SX18M) ; Vincristine (5J49Q6B70F) ; Prednisone (VB0R961HZT) ; Cyclophosphamide (8N3DW7272P)
    Language English
    Publishing date 2023-12-29
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1042374-6
    ISSN 1029-2403 ; 1042-8194
    ISSN (online) 1029-2403
    ISSN 1042-8194
    DOI 10.1080/10428194.2023.2290466
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    Zs.A 2997: Show issues Location:
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  8. Article ; Online: Crowding does not affect monarch butterflies’ resistance to a protozoan parasite

    Wajd Alaidrous / Scott M. Villa / Jacobus C. de Roode / Ania A. Majewska

    Ecology and Evolution, Vol 12, Iss 4, Pp n/a-n/a (2022)

    2022  

    Abstract: Abstract Host density is an important factor when it comes to parasite transmission and host resistance. Increased host density can increase contact rate between individuals and thus parasite transmission. Host density can also cause physiological ... ...

    Abstract Abstract Host density is an important factor when it comes to parasite transmission and host resistance. Increased host density can increase contact rate between individuals and thus parasite transmission. Host density can also cause physiological changes in the host, which can affect host resistance. Yet, the direction in which host density affects host resistance remains unresolved. It is also unclear whether food limitation plays a role in this effect. We investigated the effect of larval density in monarch butterflies, Danaus plexippus, on the resistance to their natural protozoan parasite Ophryocystis elektroscirrha under both unlimited and limited food conditions. We exposed monarchs to various density treatments as larvae to mimic high densities observed in sedentary populations. Data on infection and parasite spore load were collected as well as development time, survival, wing size, and melanization. Disease susceptibility under either food condition or across density treatments was similar. However, we found high larval density impacted development time, adult survival, and wing morphology when food was limited. This study aids our understanding of the dynamics of environmental parasite transmission in monarch populations, which can help explain the increased prevalence of parasites in sedentary monarch populations compared to migratory populations.
    Keywords density‐dependent transmission ; environmental transmission ; host population density ; host–parasite interaction ; larval density ; Ecology ; QH540-549.5
    Subject code 630
    Language English
    Publishing date 2022-04-01T00:00:00Z
    Publisher Wiley
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article: The resilience of reproductive interference

    Villa, Scott M. / Han, Diane D. / Jordan, Malichai E. / Gerardo, Nicole M.

    Evolutionary ecology. 2021 Aug., v. 35, no. 4

    2021  

    Abstract: Mating with the wrong species is surprisingly common in nature. Interspecific mating can lead to reproductive interference, where wasted time, energy, nutrients, or gametes reduces the fitness of one or both of the interacting species. However, the ... ...

    Abstract Mating with the wrong species is surprisingly common in nature. Interspecific mating can lead to reproductive interference, where wasted time, energy, nutrients, or gametes reduces the fitness of one or both of the interacting species. However, the ecological and evolutionary forces that maintain this seemingly maladaptive behavior remain poorly understood, in part because the natural complexity of heterospecific encounters is often not considered experimentally. The goal of this study was to directly test if the negative effects of heterospecific mating can be mitigated by conspecific mating. We used two closely related species of squash bug, Anasa tristis and Anasa andresii, which are known to readily mate with each other despite clear negative fitness consequences. We gave all females opportunities to mate with conspecific males before and after encountering heterospecific males. We found that A. tristis females can alleviate temporary bouts of heterospecific interference when given opportunities to mate with conspecifics. However, we found the opposite for A. andresii females. Mating with conspecifics did not shelter female A. andresii from the consequences of heterospecific mating. Our study reveals the complex dynamics of reproductive interference and highlights scenarios where mating with the wrong species can have either minimal or long-lasting effects on fitness. We emphasize the benefit of assessing reproductive interference using experiments that not only vary heterospecific encounter rates, but that also quantify lifetime measures of fitness. Our study adds to the growing body of research highlighting the importance of reproductive interference and sheds light on why this seemingly paradoxical behavior continues to persist.
    Keywords Anasa andresii ; Anasa tristis ; abnormal behavior ; conspecificity ; energy ; females
    Language English
    Dates of publication 2021-08
    Size p. 537-553.
    Publishing place Springer International Publishing
    Document type Article
    ZDB-ID 15919-0
    ISSN 1573-8477 ; 0269-7653
    ISSN (online) 1573-8477
    ISSN 0269-7653
    DOI 10.1007/s10682-021-10120-1
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  10. Article: Lack of inbreeding avoidance during mate selection in migratory monarch butterflies

    Villa, Scott M. / Kelly, Kieran P. / Hollimon, Miles G. / Protil, Karl J. / de Roode, Jacobus C.

    Behavioural processes. 2022 May, v. 198

    2022  

    Abstract: Inbreeding is generally thought to have negative consequences for organismal health. However, despite the potential fitness effects, it remains surprisingly common among wild populations. In many cases, the complex factors that underlie mating dynamics ... ...

    Abstract Inbreeding is generally thought to have negative consequences for organismal health. However, despite the potential fitness effects, it remains surprisingly common among wild populations. In many cases, the complex factors that underlie mating dynamics make predicting whether individuals should or do avoid inbreeding quite challenging. One reason inbreeding may persist among species is that the likelihood of encountering relatives can be rare. Thus, even if inbreeding has severe consequences, selection to avoid mating with kin will be weak in species that are highly dispersed. Here we investigated if migratory monarch butterflies (Danaus plexippus), which are famous for their dispersal ability, actively avoid inbreeding. We found that neither female nor male monarchs choose mates based on relatedness. These results support the hypothesis that movement ecology can mask the deleterious effects of inbreeding and relax selection for active inbreeding avoidance behaviors. Overall, our data add to the growing list of studies showing that inbreeding avoidance is not the behavioral “default” for most species. We also highlight the implications that inbreeding may have on the declining populations of this iconic butterfly.
    Keywords Danaus plexippus ; butterflies ; females ; males ; mating behavior ; migratory behavior
    Language English
    Dates of publication 2022-05
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 196999-7
    ISSN 1872-8308 ; 0376-6357
    ISSN (online) 1872-8308
    ISSN 0376-6357
    DOI 10.1016/j.beproc.2022.104630
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