Ut project pisces
However, we still predicted differences among these months.įinally, we compared the life history of G. Had data for January, March, and April, which correspond to the dry WeĪlso tested for temporal variation in the life history of G. Located in a smaller river that has no inland contact with the other. In terms of life-history traits, compared to our third site, which is Located in the same river drainage would be more similar to each other, Therefore, we predicted that the two sites Separated by approximately 120 km (linear distance), were located within WeĬollected data from three sites over 3 months and tested for differences Life-history traits of the viviparous fish Gambusia vittata. In this paper we describe spatial and temporal variation in Particular emphasis on species for which no life-history data are Variation among multiple populations through both space and time, with a Histories within the family Poeciliidae we need thorough descriptions of However, for a complete understanding of the evolution of life Point in time (e.g., Johnson, 2002 Patimar et al., 2011 Gkenas et al.,Ģ012). Of those examined, several have life-historyĭescriptions based on a single site or for collections made at a single Terms of spatial and temporal variation in their life histories (JohnsonĪnd Bagley, 2011). Researchers have examined only a few species of poeciliid fishes in Must expand our knowledge to multiple species within the same family. Viviparous fishes and of the evolutionary causes of this diversity, we To gain a complete comprehension of the diversity of life cycles of Reznick et al., 2002 ZUniga-Vega et al., 2007). Population density (Reznick and Endler, 1982 Johnson and Belk, 2001 To the same environmental factors such as predation, stream velocity, or Reticulata, Gambusia affinis, Brachyrhaphis rhabdophora), the speciesĪnd populations evolved the same traits independently and as a response The few species that have been thoroughly studied (e.g., Poecilia Life-history traits (Johnson and Bagley, 2011). The study of life histories ofĭifferent populations in the same species can help us to recognize theĭriving forces behind the observed differences among populations in Traits of poeciliid fishes vary not only across species, but also across ThisĪbundance of species makes it easy for researchers to conductĬomparative studies and to find links between life-history evolution andĬauses of natural selection (Johnson and Bagley, 2011). NearlyĢ20 species of poeciliid fish are known (Pires et al., 2011). Viviparous fishes, such as those from the family Poeciliidae, areĮxcellent models for understanding the evolution of life cycles. Of our most fundamental questions in ecology and evolutionary biology. Hence, the study of life histories offers key insights into some
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By comparing populations and species withĭifferent life-history traits, we can also better understand theĮnvironmental factors that shape evolutionary diversification (RoffĢ002). Related to selection, adaptation, speciation, and physiologicalĬonstraints, which are all crucial in understanding the evolution of No other field of science gets closer to the traits that underpinįitness than the study of life histories.
#Ut project pisces free#
MLA style: "Life history of Gambusia vittata (Pisces: Poeciliidae)." The Free Library.