PERTUMBUHAN DAN PENDUGAAN UKURAN PERTAMA KALI MATANG GONAD KEPITING KELAPA (Birgus latro) DI PULAU UTA PROPINSI MALUKU UTARA

Supyan Supyan, Sulistiono Sulistiono, Aras Syazili

Abstract


Coconut crab (B. latro) is one of crustacea species which has high economic value, but it is considered rare and
classified into vulnerable category by the International Union for Conservation of Nature (IUCN). In Indonesia,
the status of this animal population has been not exactly identified, but it has tended to decline because of local
people consumption and its habitat quality degradation. Regarding importance of the species resources, thus
undestanding its biology and ecology aspects can be applied as the proper stock management and effort of
preservation. The purpose of this study was to assess the growth and estimating the size of coconut crab at the
first gonads mature. The study was held in Uta Island from May to September 2013, sampling crab survey
conducted by cruising. The parameters that were examined to understrand the growth of these animal were
gonadal morphology and maturity level to estimate the size of the first mature gonads. The observation showed
that the male did not found in TKG I condition but the female can be found on May (30%) and September (25%)
of catch. TKG II was mostly found on male which catched on May in South Station (65%), TKG III was mostly
found on female which catched on September in West Station (25%) of catched individu. TKG IV (100%) both
male and female where mostly found on July. . The result analysis showed that the relation of Length – Weight
of male crab is W = 1,93 (CP + r)
1,17
, while the female is W = 1,97 (CP + r)
0,97
. Each of those sexual species has
allometric growth characteristics. Based on the analysis, the size of the smallest female crabs in this gonads
mature were found in length (CP+r) 65,44 mm and 93,71 mm for the male crabs.
Keywords : Birgus latro, growth, gonadal maturation, Uta island


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