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Feeding ecology and life-history strategy of nesting males in a fish with long parental care, Lusitanian toadfish (Halobatrachus didactylus, Batrachoididae)

2015Journal article Restricted access
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dc.contributor.authorFélix, Pedro M.
dc.contributor.authorAmorim, Maria Clara Pessoa
dc.contributor.authorPereira, Tadeu José
dc.contributor.authorFonseca, Paulo Jorge
dc.contributor.authorSantos, Carla Sousa
dc.contributor.authorCosta, José Lino
dc.date.accessioned2016-11-07T20:28:33Z
dc.date.available2016-11-07T20:28:33Z
dc.date.issued2015
dc.description.abstractThe Lusitanian toadfish, Halobatrachus didactylus, like other batrachoidids, is a benthic fish species with nesting behaviour during the breeding season. During this prolonged period it engages in mating activities and remains in the nest providing parental care. It is not known whether males feed while providing parental care but it is likely that their limited mobility may restrict their diet and influence their fitness. As a consequence, egg cannibalism could occur as a life-history strategy. The aim of the present study is to ascertain the feeding behaviour of nesting males, in comparison to mature non-nesting males, and to identify potential life-history traits related to egg cannibalism. Nest-holders were sampled from artificial nests placed in an intertidal area of the Tagus estuary, only exposed during spring low tides. The diet of nest-holders was compared with that of non-nesting mature males from the same area, captured by otter trawl. The present study demonstrates that despite their constrained mobility nest-holders feed during the breeding season, although in a more opportunistic fashion than non-nesting males. Nest-holders showed a generalist feeding behaviour, with a more heterogeneous diet. Egg cannibalism was not related to male condition, paternity or brood size but showed a higher incidence early in the season when water temperatures were lower. The results suggest a possible seasonal trade-off strategy between care and energy recovery, triggered by environmental factors, where under unfavourable conditions to sustain viable eggs the male may recover energy by eating eggs, thus benefiting future reproductive success, later in the season.pt_PT
dc.description.sponsorshipFundação para a Ciência e a Tecnologia (FCT)pt_PT
dc.identifier.citationJournal of the Marine Biological Association of the UK, 1-9. Doi: 10.1017/S0025315415001022pt_PT
dc.identifier.doi10.1017/S0025315415001022pt_PT
dc.identifier.issn0025-3154
dc.identifier.urihttp://hdl.handle.net/10400.12/5035
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.relationRole of acoustic signals in mate choice and male-male assessment in a strongly-vocal fish, Halobatrachus didactylus
dc.relation.publisherversionhttps://www.cambridge.org/core/journals/journal-of-the-marine-biological-association-of-the-united-kingdom/article/feeding-ecology-and-life-history-strategy-of-nesting-males-in-a-fish-with-long-parental-care-lusitanian-toadfish-halobatrachus-didactylus-batrachoididae/176E13C0AFCE60628550BE53E14033F2pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectStomach contentspt_PT
dc.subjectOpportunistic feedingpt_PT
dc.subjectNest-holderspt_PT
dc.subjectBreeding seasonpt_PT
dc.subjectEgg cannibalismpt_PT
dc.subjectEnergy trade-offpt_PT
dc.subjectTemperature influencept_PT
dc.subjectRainfall influencept_PT
dc.subjectTagus estuarypt_PT
dc.titleFeeding ecology and life-history strategy of nesting males in a fish with long parental care, Lusitanian toadfish (Halobatrachus didactylus, Batrachoididae)pt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleRole of acoustic signals in mate choice and male-male assessment in a strongly-vocal fish, Halobatrachus didactylus
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FMAR%2F118767%2F2010/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/PEst-OE%2FMAR%2FUI0199%2F2014/PT
oaire.citation.conferencePlaceUnited Kingdompt_PT
oaire.citation.endPage9pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleJournal of the Marine Biological Association of the UKpt_PT
oaire.fundingStream3599-PPCDT
oaire.fundingStream5876
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isProjectOfPublication4f07b64d-ac56-4cf9-92e0-09a654d25e31
relation.isProjectOfPublication33f102c8-13e5-4780-b961-b0d465712dcb
relation.isProjectOfPublication.latestForDiscovery4f07b64d-ac56-4cf9-92e0-09a654d25e31

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