Brooding fathers, not siblings, take up nutrients from embryos

Sagebakken, Gry; Ahnesjö, Ingrid; Mobley, Kenyon B.; Gonçalves, Inês Braga; Kvarnemo, Charlotta

doi:10.1098/rspb.2009.1767

Cited by 48 publications

(32 citation statements)

References 54 publications

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“…Although the current study found no effect of male size on the uptake of either nutrient, this might be due to large males receiving a lower dose relative to their body size. The value of amino acids is further indicated by a paternal ability to take up such nutrients of maternal origin from eggs in the brood pouch (Sagebakken et al , 2010).…”

Section: Discussionmentioning

confidence: 99%

Evidence of paternal nutrient provisioning to embryos in broad‐nosed pipefish Syngnathus typhle

Kvarnemo

Mobley

Partridge

et al. 2011

Journal of Fish Biology

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In two experiments, radioactively labelled nutrients (either (3)H-labelled amino-acid mixture or (14)C-labelled glucose) were tube-fed to brooding male Syngnathus typhle. Both nutrients were taken up by the males and radioactivity generally increased in the brood pouch tissue with time. Furthermore, a low but significant increase of (3)H-labelled amino acids in embryos was found over the experimental interval (48 h), whereas in the (14)C-glucose experiment the radioactivity was taken up by the embryos but did not increase over the experimental time (320 min). Uptake of radioisotopes per embryo did not differ with embryo size. A higher uptake mg(-1) tissue of both (3)H-labelled amino acids and (14)C-labelled glucose was found in smaller embryos, possibly due to a higher relative metabolic rate or to a higher surface-area-to-volume ratio compared to larger embryos. Uptake in embryos was not influenced by male size, embryonic developmental advancement or position in the brood pouch. It is concluded that brooding males provide amino acids, and probably also glucose, to the developing embryos in the brood pouch.

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Section: Discussionmentioning

confidence: 99%

Evidence of paternal nutrient provisioning to embryos in broad‐nosed pipefish Syngnathus typhle

Kvarnemo

Mobley

Partridge

et al. 2011

Journal of Fish Biology

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“…A preference for MHCcompatible mates, associated with the lack of detectable visual cues associated with heat-killed Vibrio infection, may mask or override a preference for uninfected females in our experiment. Furthermore, because males are in control over egg development and can actively abort and absorb eggs of unattractive females (Paczolt and Jones 2010;Sagebakken et al 2010), post-copulatory processes can correct male mate decisions. Therefore, mate preference patterns identified here may not reflect the whole complexity of mate choice behavior.…”

Section: Mate Preference Of Unchallenged Fishmentioning

confidence: 99%

Female pipefish can detect the immune status of their mates

Landis¹,

Sundin

Rosenqvist

et al. 2015

Behav Ecol Sociobiol

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Given the ubiquity of the parasites and their important fitness consequences on mate and offspring condition, selection for the ability to distinguish healthy from parasitized potential mates is a key process to enhance Darwinian fitness. In this study, we experimentally evaluated how the immunological experience of two potential partners influences mate choice, using the sex-role-reversed pipefish Syngnathus typhle. We exposed S. typhle to immune challenges with heat-killed Vibrio bacteria and investigated whether the activation of the immune system determined mate preferences. Our results demonstrate that the immune status of the potential partners influenced female mate preference, such that females that were exposed to an immune challenge became choosy and favored unchallenged males. Males, however, did not show any preferences for female immune status. In this context, we discuss mate choice decisions and behavioral plasticity as a complex result of immune challenge, severity of infection, as well as trans-generational effects.

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“…Recent studies that focused on various aspects of post‐copulatory sexual selection in syngnathids indicate that interesting phenomena are occurring after mating. For example, males in S. typhle have the ability to absorb nutrients from the embryos in their pouches, which sets the stage for sexual conflict (Sagebakken et al , 2010). Results from an experiment in S. scovelli further suggest that post‐copulatory sexual selection and sexual conflict may be occurring (Paczolt & Jones, 2010).…”

Section: Parentage Sexual Selection and Mating Behaviour In Syngnathmentioning

confidence: 99%

The genetics and genomics of Syngnathidae: pipefishes, seahorses and seadragons

Mobley

Small

Jones

2011

Journal of Fish Biology

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The goal of this review was to provide a historical overview of how molecular techniques have increased the understanding of the ecology and evolution of the family Syngnathidae (pipefishes, seahorses and seadragons). Molecular studies based primarily on mitochondrial DNA markers have proved their worth by elucidating complex phylogenetic relationships within the family. Phylogeographic studies, which have revealed how life-history traits and past climatic events shape geographic distributions and patterns of genetic variation within syngnathid species, also provide interesting case studies for the conservation and management of threatened species. The application of microsatellite DNA markers has opened a floodgate of studies concerned with the breeding biology of these fishes, which are interesting due to their unique reproductive mode of male pregnancy. Research in this area has contributed significantly to the understanding of mating patterns and sexual selection. Molecular markers may also be employed in studies of demography, migration and local breeding population sizes. Genomic studies have identified genes that are probably involved in male pregnancy and promise additional insights into various aspects of syngnathid biology at the level of the gene. Despite these advances, much more remains to be explored. Goals for future research should include: (1) a more inclusive phylogeny to resolve outstanding issues concerning the relationships within the family and higher order taxa, (2) a broader use of molecular studies to aid management and conservation efforts, (3) the inclusion of more genera in comparative behavioural studies and (4) the continued development of genomic resources for syngnathids to facilitate comparative genomic work.

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Brooding fathers, not siblings, take up nutrients from embryos

Cited by 48 publications

References 54 publications

Evidence of paternal nutrient provisioning to embryos in broad‐nosed pipefish Syngnathus typhle

Evidence of paternal nutrient provisioning to embryos in broad‐nosed pipefish Syngnathus typhle

Female pipefish can detect the immune status of their mates

The genetics and genomics of Syngnathidae: pipefishes, seahorses and seadragons

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