Brachyraphis Fish Morphological Behavior When Faced With Competition
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Competition, Live-Bearing Fish, Evolution, Sympatry
The evolutionary process of speciation occurs when a population is separated biologically. Speciation can develop in either a non-overlapping or overlapping geographical area which is called an allopatric or sympatric speciation event, respectively.
We have discovered a novel phenomenon where two different species of fish in the tropical genus Brachyrahaphis, B. rhabdophora and B. terrabensis, coexist in the same population. B. terrabensis has been found to also coexists with another species, B. roseni (Ingley 2014), making this a unique system with multiple combinations of different closely-related species cooccurring.
We hypothesized that sympatric populations would diverge from allopatric populations due to competition. We used geometric morphometrics, the measurement of the fusiform body shape of fish, to quantify shape variation between allopatric and sympatric populations which will allow us to determine if and how competition is working on these species.
BYU ScholarsArchive Citation
Chamberlain, Lexie; Williams, Trevor J.; Duffy, Alli G.; and Johnson, Jerald B., "Brachyraphis Fish Morphological Behavior When Faced With Competition" (2021). Library/Life Sciences Undergraduate Poster Competition 2021. 31.
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