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dc.contributor.authorDenusta, Pastor Jones
dc.contributor.authorDe Jesus-Ayson, Evelyn Grace
dc.contributor.authorLaron, Manuel
dc.contributor.authorAya, Frolan
dc.contributor.authorGarcia, Luis Maria
dc.coverage.spatialPhilippinesen
dc.coverage.spatialTaal, Lakeen
dc.date.accessioned2023-11-10T03:41:55Z
dc.date.available2023-11-10T03:41:55Z
dc.date.issued2019-04-19
dc.identifier.citationDenusta, P. J. T., De Jesus‐Ayson, E. G., Laron, M. A., Aya, F. A., & Garcia, L. M. B. (2019). Gonad development and size‐at‐maturity of silver therapon Leiopotherapon plumbeus (Kner 1864; Teleostei: Terapontidae) in tropical volcanic lakes in south Luzon, Philippines. Journal of Applied Ichthyology, 35(4), 933-943. https://doi.org/10.1111/jai.13915en
dc.identifier.issn0175-8659
dc.identifier.urihttps://hdl.handle.net/20.500.14353/302
dc.description.abstractGonad development of the silver therapon Leiopotherapon plumbeus in two volcanic crater lake habitats (Sampaloc Lake, Taal Lake) in south Luzon, Philippines was examined during the annual reproductive cycle. The minimum body size-at-maturity of fish in these two lake habitats was also compared. Four gonad development stages were characterized as basis for the classification of ovarian (immature, maturing, mature, spawned) and testicular maturation (immature, maturing, mature) phases. The occurrence of all development stages in individual gonads suggest an asynchronous development whereby advanced stages are recruited continuously from a pool of younger stage germ cells to result in elevated female and male GSI throughout the annual cycle due to active gonadogenesis. Together with the increasing occurrence of advanced stage oocytes and spermatozoa from March until October, the elevated GSI of fish may indicate peak gonadal growth during the onset of the dry season (December–January) for eventual spawning from the beginning (May–June) until the end of the wet season (October–November). In both lake habitats, male fish were smaller than females but, regardless of sex, the minimum size-at-maturity of fish in Sampaloc Lake was significantly smaller than fish in Taal Lake. Overall, asynchronous development during oogenesis and spermatogenesis allows for year-round reproduction of silver therapon, with elevated gonad growth in the dry season in preparation for spawning during the wet season. Compared with fish in Taal Lake, a smaller size-at-maturity of fish in Sampaloc Lake may be a response of the wild fishery stock to long-term high fishing mortality and degradation of the lake habitat.en
dc.description.sponsorshipThe authors thank the fund support provided by UP NSRI (Project BIO-09-2-06), SEAFDEC/AQD (Project Br-02-F2009B), and the Accelerated Science and Technology Human Resource Development Program of the Philippine Department of Science and Technology. This paper is part of a doctoral dissertation of PJTD submitted to the UP Institute of Biology. Field and laboratory assistance was provided by Ms. Rieziel Ann Bernal. Sampling and processing of specimens comply with existing regulations in the Philippines. There are no sources of conflict of interest by any of the authors of this manuscript.en
dc.language.isoenen
dc.publisherBlackwell Publishing Ltd.en
dc.subjectfish oogenesisen
dc.subjectgonad developmenten
dc.subjectsilver theraponen
dc.subjectsize-at-maturityen
dc.subjectspermatogenesisen
dc.subjectvolcanic lakeen
dc.subject.lcshCrater lakesen
dc.subject.lcshOogenesisen
dc.subject.lcshGonadsen
dc.subject.lcshSpermatogenesis in animalsen
dc.subject.lcshTeraponidaeen
dc.titleGonad development and size-at-maturity of silver therapon Leiopotherapon plumbeus (Kner 1864; Teleostei:Terapontidae) in tropical volcanic lakes in south Luzon, Philippinesen
dc.typeArticleen
dcterms.accessRightsLimited public accessen
dc.citation.journaltitleJournal of Applied Ichthyologyen
dc.citation.volume35en
dc.citation.issue4en
dc.citation.firstpage933en
dc.citation.lastpage943en
local.subject.scientificnameLeiopotherapon plumbeusen
local.subject.scientificnameTerapontidaeen
local.subject.scientificnameTeleosteien
dc.identifier.doi10.1111/jai.13915
local.isIndexedByISIen
local.isIndexedByScopusen


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