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Induction of ovulation and spawning in the Mediterranean red porgy, Pagrus pagrus, by controlled delivery and acute injection of GnRHa

2005Journal article Open access
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dc.contributor.authorKokokiris, L.
dc.contributor.authorCanario, Adelino V. M.
dc.contributor.authorMylonas, Constantinos C.
dc.contributor.authorPavlidis, M.
dc.contributor.authorKentouri, M.
dc.contributor.authorDivanach, P.
dc.date.accessioned2014-05-15T13:33:26Z
dc.date.available2014-05-15T13:33:26Z
dc.date.issued2005
dc.date.updated2014-05-13T10:02:47Z
dc.description.abstractGonadotropin-releasing hormone analogue (GnRHa) in the form of saline injections or sustained-release microspheres was used to induce oocyte maturation, ovulation, and spawning in captive red porgy (Pagrus pagrus). Individually tagged vitellogenic females (n = 9 or 10) were treated at the beginning of the spawning season (March) with 20 μg/kg body weight (bw) GnRHa-loaded microspheres, a single injection of 20 μg/kg bw dissolved in saline, or physiological saline (control). Females were placed in tanks (one tank per treatment) connected to overflow egg collectors and monitored for 11 days. In addition to the eggs collected from the tank overflow, eggs were stripped from the fish on a daily basis. Only one spawn was obtained from the control fish, probably from a single female, given the small relative fecundity (700 eggs/kg bw). On the contrary, treatment with a GnRHa injection produced two spawns (9 and 11 days after treatment) and 50% of the fish ovulated. Treatment with GnRHa microspheres induced seven spawns (3 and 6-11 days after treatment) and 100% of the females ovulated. Females did not spawn all the eggs ovulated on a particular day, evident from the significant number of eggs obtained by manual stripping. Egg quality did not significantly differ among treatments, whereas number of spawned eggs and total relative fecundity were significantly higher in fish treated with GnRHa microspheres (ANOVA, p<0.05). The results demonstrate the potential of GnRHaloaded microspheres to induce spawning in red porgy, as a method of overcoming spawning failures in commercial hatcheries.por
dc.identifier.citationKokokiris, L.; Canario, A. V. M.; Mylonas, C.C; Pavlidis, M.; Kentouri, M.; Divanach, P. Induction of ovulation and spawning in the Mediterranean red porgy, Pagrus pagrus, by controlled delivery and acute injection of GnRHa,, 57, 4, 223-230, 2005.por
dc.identifier.issn0792 - 156X
dc.identifier.otherAUT: ACA00258;
dc.identifier.urihttp://hdl.handle.net/10400.1/3960
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherThe Society of Israeli Aquaculture and Marine Biotechnology (SIAMB)por
dc.relation.publisherversionhttp://www.aquaculturehub.orgpor
dc.subjectGnRHapor
dc.subjectPagruspor
dc.subjectRed porgypor
dc.subjectMicrospherespor
dc.subjectInduced spawningpor
dc.titleInduction of ovulation and spawning in the Mediterranean red porgy, Pagrus pagrus, by controlled delivery and acute injection of GnRHapor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage223por
oaire.citation.issue4por
oaire.citation.startPage230por
oaire.citation.titleIsraeli Journal of Aquaculture-Bamidgehpor
oaire.citation.volume57por
person.familyNameCanario
person.givenNameAdelino
person.identifier143624
person.identifier.ciencia-id1F1E-D3B3-F804
person.identifier.orcid0000-0002-6244-6468
person.identifier.ridC-7942-2009
person.identifier.scopus-author-id56568523700
rcaap.rightsopenAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication5f6e51ee-9113-469e-8b9e-f30f2d452521
relation.isAuthorOfPublication.latestForDiscovery5f6e51ee-9113-469e-8b9e-f30f2d452521

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