Short Communication: Biological aspects of Charybdis anisodon (De Haan, 1850) in Lasongko Bay, Central Buton, Southeast Sulawesi, Indonesia

Abstract

Hamid A, Wardiatno Y. 2018. Short Communication: Biological aspects of Charybdis anisodon (De Haan, 1850) in Lasongko Bay, Central Buton, Southeast Sulawesi, Indonesia. Biodiversitas 19: 1755-1762. Data on the biological aspects of Charybdis anisodon (De Haan, 1850) were still very limited. This study was aimed to determine the distribution of size, growth type, sex ratio and spawning season of C. anisodon in Lasongko Bay, Central Buton, Southeast Sulawesi. Crab collection was conducted from May 2013 to March 2014 using a crab gillnet. The carapace width of males and females C. anisodon ranged between 3.05-7.61 cm and 3.45-7.98 cm, respectively. Mann-Whitney test showed that width and length of carapace of males and females were significantly different (p<0.05). Type of growth of carapace width-body weight male and female were both allometric negative. Carapace length-body weight relationships of the males was isometric, but it was allometric negative for females. Spatially and temporally, the sex ratio of C. anisodon showed a variation, and the total sex ratio was 1: 0.38. The spawning season of C. anisodon tend to occur throughout the year.

eDNA metabarcoding of decapod crustaceans across Indonesian seas has implications for biodiversity conservation and fisheries sustainability

“…This distribution makes it likely that C. japonica is native to the Java Sea, including Probolinggo, the site in East Java where this species was identified. As a commercial fisheries species, C. anisodon is considered of lower economic value than P. pelagicus (Hamid & Wardiatno, 2018) but is frequently caught in fisheries targeting P. pelagicus in areas as far apart as Southeast Sulawesi, Indonesia (Hamid et al, 2020) and Tanzania (Chande & Mgaya, 2003). Widespread globally and within Indonesia, predominantly freshwater decapods of the genus Macrobrachium include several obligate or landlocked species as well as amphidromous species with a marine larval stage (Wowor et al, 2009) and some fully marine species (Liu et al, 2007).…”

Habitat and Biological Aspects of Sentinel Crab, Podophthalmus vigil (Fabricus 1798) in Lasongko Bay, Southeast Sulawesi

“…Rasio kelamin P. vigil dinyatakan sebagai rasio jumlah betina terhadap jumlah jantan yang tertangkap pada setiap stasiun dan pengambilan data. Rasio kelamin P. vigil dianalisis berdasarkan stasiun dan periode pengambilan data serta dihitung dengan persamaan Hamid & Wardiatno (2018) seperti berikut:…”

“…Rasio kelamin P. vigil yang ditemukan pada penelitian ini cenderung bervariasi baik secara spasial maupun temporal (Tabel 5 dan 6), dan pola yang sama juga terjadi pada rasio kelamin rajungan (Hamid 2015;Hamid et al 2016a) dan Charybdis anisodan (Hamid & Wardiatno 2018) di Teluk Lasongko. Adanya variasi rasio kelamin tersebut disebabkan oleh jumlah jantan atau betina P.vigil cukup menonjol pada stasiun atau bulan tertentu (Tabel 5 dan 6).…”

“…P. vigil termasuk anggota famili Portunidae, yang mana musim pemijahan famili ini umumnya berlangsung sepanjang tahun, sehingga pola pemijahan P. vigil di Teluk Lasongko masih perlu dikaji lebih lanjut. Musim pemijahan rajungan dan C. anisodan di Teluk Lasongko berlangsung sepanjang tahun (Hamid et al 2015(Hamid et al , 2016aHamid & Wardiatno 2018). Puncak musim pemijahan rajungan di Teluk Lasongko terjadi pada bulan Agustus dan November (Hamid et al 2015(Hamid et al , 2016a dan C. anisodan terjadi pada bulan Februari, Juni, dan November (Hamid & Wardiatno 2018).…”

“…Musim pemijahan rajungan dan C. anisodan di Teluk Lasongko berlangsung sepanjang tahun (Hamid et al 2015(Hamid et al , 2016aHamid & Wardiatno 2018). Puncak musim pemijahan rajungan di Teluk Lasongko terjadi pada bulan Agustus dan November (Hamid et al 2015(Hamid et al , 2016a dan C. anisodan terjadi pada bulan Februari, Juni, dan November (Hamid & Wardiatno 2018). Charybdis natator juga memijah sepanjang tahun (Sumpton 1990;Sallam & Gab-Alla 2010;Vidhya 2016), demikian juga C. feriatus (Dineshbabu 2011;Nieves et al 2015b) dan C. hellerii (Bolanos et al 2012;Sant'Anna et al 2012).…”