rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Postcopulatory sexual selection and the evolution of male pregnancy in the Gulf pipefish
  name:
    name part: Paczolt, Kimberly.
    role:
      role term: creator
  name:
    name part: Jones, Adam G.
    role:
      role term: thesis advisor.
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: txu
    date issued: 2012
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: remote
    extent: 1 online resource.
  abstract: Male pregnancy is a complex and energetically costly form of male parental care found exclusively in the fish family Syngathidae, which includes pipefishes, seahorses, and seadragons. The novelty of the male brood pouch raises questions about how this trait evolved and what role it plays in sexual selection. One possibility is that brood pouch evolution was partially shaped by postcopulatory sexual selection. We used the sexually dimorphic Gulf pipefish, Syngnathus scovelli, to test for postcopulatory sexual selection within broods and tradeoffs between successive male pregnancies as a function of female attractiveness. Offspring survivorship within a pregnancy was affected by the size of a male's mate, the number of eggs transferred, and the male's mating history. These results indicate the males invest more resources into broods from large, attractive mates to the detriment of future broods. Next, we investigated the effects of food limitation on male parental care strategies. Our data suggests that male Gulf pipefish sacrifice investment in future reproduction, via somatic growth, in favor of current reproduction. A positive relationship between number of failed eggs and male growth rate in our low-food treatments suggests that males may derive an energetic benefit from unsuccessful eggs in the brood pouch. Finally, we used a paired design, to investigate the effect of perceived female attractiveness on offspring survivorship. We found that, in general, males prefer the largest female available. Within a replicate, we found that the male that preferred their mate more, regardless of stimulus female size, also had higher offspring survivorship in the resulting brood. This result is exciting because it shows not only that cryptic male choice affects offspring survivorship in Gulf pipefish but also that mate preference can have a prolonged effect on an individual̕ s reproductive success. Ultimately, our data suggests that the evolution of the brood pouch has produce…
  note: by Kimberly Paczolt.
  note: "Major Subject: Zoology"
  note: Electronic resource.
  note: Doctor of Philosophy Texas A&M University 2012 http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10854
  note: Includes bibliographical references.
  note: Text (Dissertation)
  subject:
    topic: Major Zoology
  subject:
    topic: brood reduction
  subject:
    topic: postcopulatory sexual selection
  subject:
    topic: parental care
  subject:
    topic: male pregnancy
  subject:
    topic: differential allocation
  identifier: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10854
  record info:
    record content source: TXA
    record creation date: 121017
    record change date: 20150922124443.0
    record identifier: in00002754909