THE ROLE OF EXPERIENCE IN MATING PREFERENCES OF THE UNISEXUAL AMAZON MOLLY

Behaviour ◽  
1999 ◽  
Vol 136 (2) ◽  
pp. 257-268 ◽  
Author(s):  
Jakob Parzefall ◽  
Ole Lutjens ◽  
Ingo Schlupp ◽  
Kay Korner

AbstractThe all-female fish Poecilia formosa uses sperm of Poecilia latipinna or P. mexicana for its gynogenetic reproduction. Normally, P. formosa lives in sympatry with only one of these species. Near Tampico, Mexico, one population of P. formosa is living in sympatry with both sperm-donor species. In the present study, using animated videos as stimuli, we examined whether P. formosa from Tampico show a sexual preference for males of one of the two species. We raised P. formosa females with males of P. latipinna or P. mexicana only, and as a control with males of both species simultaneously. We found that previous experience affects mating preferences in P. formosa. Females tend to prefer males of the species they were raised with.

2013 ◽  
Vol 97 (8) ◽  
pp. 875-880 ◽  
Author(s):  
Laura Alberici da Barbiano ◽  
Reginald J. Robinson ◽  
Michael Tobler ◽  
Andrea S. Aspbury ◽  
Caitlin R. Gabor

2008 ◽  
Vol 4 (3) ◽  
pp. 266-269 ◽  
Author(s):  
Rüdiger Riesch ◽  
Ingo Schlupp ◽  
Martin Plath

In sperm-dependent sexual/asexual mating systems, male mate choice is critical for understanding the mechanisms behind apparent stability observed in natural populations. The gynogenetic Amazon molly ( Poecilia formosa ) requires sperm from sexual males (e.g. Poecilia latipinna ) to trigger embryogenesis, but inheritance is strictly maternal. Consequently, males should try to avoid or reduce the cost of mating with asexuals. We investigated male mate choice by documenting the presence of sperm in natural populations and found that a higher proportion of sexual females had sperm than asexuals. In addition, among those females that had sperm, sexuals had more sperm than asexuals. Our results hint at a role for male mate choice as a stabilizing factor in such systems.


2008 ◽  
Vol 363 (1505) ◽  
pp. 2901-2909 ◽  
Author(s):  
K.P Lampert ◽  
M Schartl

Clonal reproduction in vertebrates can always be traced back to hybridization events as all known unisexual vertebrates are hybrids between recognized species or genetically defined races. Interestingly, clonal vertebrates often also rely on interspecific matings for their reproduction because gynogenesis (sperm-dependent parthenogenesis) and hybridogenesis are common modes of propagation. While in most cases these hybridization events leave no hereditary traces in the offspring, occasionally the genome exclusion mechanism fails and either small parts of male genetic material remain inside the oocyte in the form of microchromosomes, or fusion of the sperm nucleus with the oocyte nucleus leads to polyploid individuals. In this review, we highlight the important role of hybridization for the origin and evolution of a unisexual hybrid: the Amazon molly, Poecilia formosa .


2021 ◽  
pp. 002214652110444
Author(s):  
Orlaith Heymann ◽  
Tamika Odum ◽  
Alison H. Norris ◽  
Danielle Bessett

Recent shifts in the abortion provision landscape have generated increased concern about how people find abortion care as regulations make abortion less accessible and clinics close. Few studies examine the reasons that people select particular facilities in such constrained contexts. Drawing from interviews with 41 Ohio residents, we find that people’s clinic selections are influenced by the risks they associate with abortion care. Participants’ strategies for selecting an abortion clinic included: drawing on previous experience with clinics, consulting others online, discerning reputation through name recognition and clinic type, and considering location, especially perceptions about place (privacy, legality, safety). We argue that social myths inform the risks people anticipate when seeking health care facilities, shaping care seeking in ways that are both abortion-specific and more general. These findings can also inform research in other health care contexts where patients increasingly find their options constrained by rising costs, consolidation, and facility closure.


2009 ◽  
Vol 58 (4) ◽  
pp. 672-687 ◽  
Author(s):  
Yannick Stephan ◽  
Thomas Deroche ◽  
Britton W. Brewer ◽  
Johan Caudroit ◽  
Christine Le Scanff

2008 ◽  
Vol 17 (24) ◽  
pp. 5220-5230 ◽  
Author(s):  
HELMUT SCHASCHL ◽  
MICHAEL TOBLER ◽  
MARTIN PLATH ◽  
DUSTIN J. PENN ◽  
INGO SCHLUPP

2016 ◽  
Author(s):  
◽  
Sheila O'Hare

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] This exploratory study applied models of human information behavior and health information acquisition to the acquisition of legal information by the public. A mixed methods approach, consisting of two sequential phases, was utilized. First, an online survey consisting of 45 multiple-choice questions was administered to a Qualtrics panel of 385 individuals without formal legal training who were at least 18 years of age. In the second phase, eleven individuals who met the same screening criteria were interviewed in order to provide additional elaboration upon and clarification of the survey data. In phase 1, frequency of legal information searching and incidental discovery of legal information (information encountering, or IE) was assessed for relationships with personal, affective, contextual, and environmental factors. Findings indicate that individuals who search and encounter legal information more frequently share certain demographic and affective characteristics with their counterparts in the acquisition of health information. Age, income, and previous experience with the legal system were associated with greater legal search frequency. Age, race, and previous experience with the legal system were associated with greater frequency of legal IE. Self-efficacy and vigilance were both associated with frequency of search and IE, though perception of the legal system was not. Subjects searched and encountered more frequently because of curiosity than other situational factors. The role of risk in search and encounter frequency could not be determined. Both exposure to multiple information sources and to multiple mass media sources were associated with greater frequency of legal search and IE. In phase 2, subjects were asked about their searches and IE experiences with legal information, and the role of legal information in their everyday lives, especially as compared to health information acquisition. Findings indicate that members of the public define legal information quite narrowly as tied to lawyers and courts, rather than rights and duties (even provided with a more inclusive definition), and often fail to relate routine encounters with the law to their larger understanding of the legal system. Survey findings were corroborated in terms of source choices, the roles of previous experience, self-efficacy, and avoidance-vigilance. The increased availability of legal information sources through the internet has made it easier for people to find codes and regulations, but has not made it easier to find the information necessary to assess more complex legal issues. Other emergent themes identified in phase 2 included the detrimental effect of attorney advertising and the perception of legal information as disruptive, in contrast to the embeddedness of health information in everyday life.


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