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William Erby Yue Zhang Thursday 5:20 – 6:10 pm EEOB 3310 9/15/14

Annotated Bibliography Topic: The evolution of sexual role reversal in seahorses, specifically the male brood pouch.

A.B. Wilson, A. Vincent, I. Ahnesjo, and A. Meyer. “ Male Pregnancy in Seahorses and Pipefishes ( Family Syngnathidae): Rapid Diversification of Paternal Brood Pouch Morphology Inferred From a Molecular Phylogeny.” J Hered (2001) 92; 159- 166. Journal of Heredity. Online

This article describes the process of mating in seahorse species and other syngnathid species. It states the female transfers her eggs to a specialized structure on the male, usually on the abdomen or the tail called a brooding structure. The article demonstrates the combined cytochrome b-. 12S r DNA and 16S r DNA is responsible for the brooding structure.

A.G. Jones and J. C. Avise. “Mating Systems and Sexual Selection in Male-Pregnant Pipfishes and Seahorses: Insight from Microsatellite-Based Studies of Maternity.” J Hered (2001) 92: 150- 158. Online

This article test the relationship between sexual role reversal and the presence of microsatellite polymorphism in species that demonstrate sexual role reversal. Evidence of the allele showed 9 – 44 per locus.

Angela Bahr and Anthony B. Wilson. “ The impact of sex-role reversal on the diversity of the major histocompatibility complex: Insights from the seahorse (Hippocampus abdominalis.” Biomedicalcenteal (2011) Online.

This article, sex role reversal is hypothesized as a result of the histocompatibility complex (MHC/MH). It is found that the MH class II beta-chain gene and it’s variation in male seahorses is responsible for the brood pouch. Kimberly A. Paczol and Adam G. Jones. “Post-copulatory sexual selection and sexual conflct in the evolution of male pregnancy.” Nature 464, 401- 404 (March 2011). Online

This article questions whether the brood pouch was shaped by parent offspring, sexual conflict, and processes affecting pregnancies. The experiment tested male breeding strategies to record behavioral effects on brooch development. Kai N. Stolting and Anthony B. Wilson. “Male pregnancy in seahorses and pipefish: beyond the mammalian model.” BioEssays vol 29, Issue 9, (Aug 2007). Online.

In this article, inspect the specialized reproductive system in syngnathid fishes. The authors review the similarities between seahorses and mammals to understand how male pregnancy has evolved in syngnathid species.