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Syngnathus Scovelli

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https://www.readbyqxmd.com/read/27485274/population-genomics-reveals-multiple-drivers-of-population-differentiation-in-a-sex-role-reversed-pipefish
#1
Sarah P Flanagan, Emily Rose, Adam G Jones
A major goal of molecular ecology is to identify the causes of genetic and phenotypic differentiation among populations. Population genomics is suitably poised to tackle these key questions by diagnosing the evolutionary mechanisms driving divergence in nature. Here, we set out to investigate the evolutionary processes underlying population differentiation in the Gulf pipefish, Syngnathus scovelli. We sampled approximately 50 fish from each of 12 populations distributed from the Gulf coast of Texas to the Atlantic coast of Florida and performed restriction-site-associated DNA sequencing to identify SNPs throughout the genome...
October 2016: Molecular Ecology
https://www.readbyqxmd.com/read/25292365/sexual-selection-on-female-ornaments-in-the-sex-role-reversed-gulf-pipefish-syngnathus-scovelli
#2
S P Flanagan, J B Johnson, E Rose, A G Jones
Understanding how selection acts on traits individually and in combination is an important step in deciphering the mechanisms driving evolutionary change, but for most species, and especially those in which sexual selection acts more strongly on females than on males, we have no estimates of selection coefficients pertaining to the multivariate sexually selected phenotype. Here, we use a laboratory-based mesocosm experiment to quantify pre- and post-mating selection on female secondary sexual traits in the Gulf pipefish (Syngnathus scovelli), a sexually dimorphic, sex-role-reversed species in which ornamented females compete for access to choosy males...
November 2014: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/24324861/functional-similarity-and-molecular-divergence-of-a-novel-reproductive-transcriptome-in-two-male-pregnant-syngnathus-pipefish-species
#3
Clayton M Small, April D Harlin-Cognato, Adam G Jones
Evolutionary studies have revealed that reproductive proteins in animals and plants often evolve more rapidly than the genome-wide average. The causes of this pattern, which may include relaxed purifying selection, sexual selection, sexual conflict, pathogen resistance, reinforcement, or gene duplication, remain elusive. Investigative expansions to additional taxa and reproductive tissues have the potential to shed new light on this unresolved problem. Here, we embark on such an expansion, in a comparison of the brood-pouch transcriptome between two male-pregnant species of the pipefish genus Syngnathus...
October 2013: Ecology and Evolution
https://www.readbyqxmd.com/read/20449996/the-description-of-gyrodactylus-corleonis-sp-n-and-g-neretum-sp-n-platyhelminthes-monogenea-with-comments-on-other-gyrodactylids-parasitising-pipefish-pisces-syngnathidae
#4
Giuseppe Paladini, Joanne Cable, Maria Letizia Fioravanti, Patricia J Faria, Andrew P Shinn
The current work describes two new species of Gyrodactylus von Nordmann, 1832 collected from pipefish Syngnathus scovelli (Evermann et Kendall) and Syngnathus typhle L. during two separate gyrodactylosis episodes on fish held in a public aquarium located in northern Italy. The gyrodactylids collected from the skin, fins and gills of pipefish were subjected to a morphological analysis of the attachment hooks and the morphometric data were compared to the four species of Gyrodactylus previously described from syngnathid hosts, namely G...
March 2010: Folia Parasitologica
https://www.readbyqxmd.com/read/20237568/post-copulatory-sexual-selection-and-sexual-conflict-in-the-evolution-of-male-pregnancy
#5
Kimberly A Paczolt, Adam G Jones
Male pregnancy in seahorses, pipefishes and sea dragons (family Syngnathidae) represents a striking reproductive adaptation that has shaped the evolution of behaviour and morphology in this group of fishes. In many syngnathid species, males brood their offspring in a specialized pouch, which presumably evolved to facilitate male parental care. However, an unexplored possibility is that brood pouch evolution was partly shaped by parent-offspring or sexual conflict, processes that would result in trade-offs between current and future pregnancies...
March 18, 2010: Nature
https://www.readbyqxmd.com/read/17398130/osmoregulatory-role-of-the-brood-pouch-in-the-euryhaline-gulf-pipefish-syngnathus-scovelli
#6
Charlyn Partridge, Judith Shardo, Anne Boettcher
Many species of pipefish exhibit a reversal of parental roles, in which females insert eggs into the brood pouch of the male where they are incubated until the end of embryonic development. While the significance of the male brood pouch has been examined for over a century, the role of the pouch is still unclear. One possible function is to aid in osmoregulation by buffering embryos from the external environment. To investigate this role, the euryhaline Gulf pipefish, Syngnathus scovelli, was collected and maintained in either a low salinity or a saltwater environment...
June 2007: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/16610331/male-pregnancy-and-the-evolution-of-body-segmentation-in-seahorses-and-pipefishes
#7
Eric A Hoffman, Kenyon B Mobley, Adam G Jones
The evolution of complex traits, which are specified by the interplay of multiple genetic loci and environmental effects, is a topic of central importance in evolutionary biology. Here, we show that body and tail vertebral numbers in fishes of the pipefish and seahorse family (Syngnathidae) can serve as a model for studies of quantitative trait evolution. A quantitative genetic analysis of body and tail vertebrae from field-collected families of the Gulf pipefish, Syngnathus scovelli, shows that both traits exhibit significantly positive additive genetic variance, with heritabilities of 0...
February 2006: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/16158862/effects-of-an-environmental-estrogen-on-male-gulf-pipefish-syngnathus-scovelli-evermann-and-kendall-a-male-brooding-teleost
#8
N Ueda, C Partridge, J Bolland, J Hemming, T Sherman, A Boettcher
No abstract text is available yet for this article.
June 2005: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/11749706/genetic-evidence-for-extreme-polyandry-and-extraordinary-sex-role-reversal-in-a-pipefish
#9
A G Jones, D Walker, J C Avise
Due to the phenomenon of male pregnancy, the fish family Syngnathidae (seahorses and pipefishes) has historically been considered an archetypal example of a group in which sexual selection should act more strongly on females than on males. However, more recent work has called into question the idea that all species with male pregnancy are sex-role reversed with respect to the intensity of sexual selection. Furthermore, no studies have formally quantified the opportunity for sexual selection in any natural breeding assemblage of pipefishes or seahorses in order to demonstrate conclusively that sexual selection acts most strongly on females...
December 22, 2001: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/9076975/microsatellite-analysis-of-maternity-and-the-mating-system-in-the-gulf-pipefish-syngnathus-scovelli-a-species-with-male-pregnancy-and-sex-role-reversal
#10
A G Jones, J C Avise
Highly variable microsatellite loci were employed to study the mating system of the sexually dimorphic Gulf pipefish Syngnathus scovelli. In this species, like others in the family Syngnathidae, 'pregnant' males provide all parental care. Gulf pipefish were collected from one locale in the northern Gulf of Mexico, and internally carried broods of 40 pregnant males were analysed genetically. By comparing multilocus microsatellite fingerprints for the inferred mothers against expected genotypic distributions from the population sample, it was determined that: (i) only one male had received eggs from more than a single female; and (ii) on two separate occasions, two different males had received eggs from the same female...
March 1997: Molecular Ecology
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