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Conditioning of broodstock of tiger grouper, Epinephelus fuscoguttatus,in a recirculating aquaculture system

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Closing the cycle of commercial species of fish in a recirculating aquaculture system is gaining impor-tance for a number of practical advantages. Founder broodstock originating from the wild population isconditioned to live in hatchery tanks under suitable environmental and feeding conditions and is inducedto breed. The juveniles are grown to maturity and facilitated to spawn in captivity to close the life cycle inthe hatchery. This experiment was carried out on tiger grouper (Epinephelus fuscoguttatus). After prelim-inary observations, it was possible to identify appropriate environmental conditions in terms of waterquality parameters, volume of broodstock tanks and ration. Growth was nearly isometric (growth expo-nent = 2.9185) and the condition factor = 1.86. This reflected good management conditions. Cues thattrigger sex reversal in this protogynous fish in the hatchery were different from those that operate innature. It appears that the differentiation of some individuals of a cohort into male sex is linked to socio-demographic cues as well as internal condition of the fish because it related to age and physiologicalcondition. This view was reinforced by a lack of response in young fish to similar cues. The informa-tion generated through this study defines what is required for optimum conditioning of tiger grouperbroodstock and explains the cues involved in sex differentiation.

Keywords:Tiger grouperBroodstockConditioningSocio-demographic cuesIntrinsic factorsSex reversala

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Ketersediaan

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Informasi Detail

Judul Seri

Aquaculture Reports

No. Panggil

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Penerbit

: Elsevier., 2015

Deskripsi Fisik

Aquaculture Reports 2 (2015) 117–119

Bahasa

English

ISBN/ISSN

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Klasifikasi

NONE

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

2 (2015)

Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

Wati/Agus

Versi lain/terkait

Lampiran Berkas

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