Rusdi Hasan
Program Studi Pendidikan Biologi Universitas Muhammadiyah Bengkulu, Indonesia Jalan Bali 118 Kota Bengkulu 38119

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Journal : Prosiding Seminar Biologi

MORFOMETRI DAN ALOMETRI KEPITING BIOLA UCA PERPLEXA YANG TERDAPAT PADA VEGETASI MANGROVE DI PULAU BAAI, BENGKULU Hasan, Rusdi
Prosiding Seminar Biologi Vol 11, No 1 (2014): Seminar Nasional XI Pendidikan Biologi
Publisher : Prodi Pendidikan Biologi FKIP UNS

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Abstract

The study of mophology, morphometry and alometry of Uca perplexa, one of fiddler crabs that dominated at mangrove vegetation in Pulau Baii of Bengkulu have been conducted. We measured morphometric characters including body weight and sizes of carapace, abdomen, chelae, frontal, eyebrow and eye stalk. The result showed Uca perplexa live at sandy mud substrate and made burrow around mangrove roots. Uca perplexa have back carapace with some horizontal white strips. Carapace was acute and straight at anteriolateral part and rounded at dorsolateral. Their foot color usually brown although some of them were grey, were also found. The male (2.4±0.96 g) has higher of body weight than female (0.77±0.23 g) caused by dimorphism of chelae in male. Carapace width of male and female were 14.74±4.42 mm and 10.42±3.24 mm, respectively. As for abdomen width of male was 5.16±1.61 mm and of female was 6.58±1.38 mm. The length of major chelae was 44.66±9.22 mm as minor chelae was 10.50±0.49 mm. The frontal length of male was 3.44± 0.44 mm as for female was 2.83±0.69 mm. The eyebrows were narrow with eye stalks length for male and female were 6.50±2.46 and 4.20±0.92, respectively. Alometric analysis showed that Uca perplexa either male or female has growth pattern with negative alometry (b<3). It suggest the increase of body weight in Uca perplexa is slower than the increase of size of its carapace, abdomen and chelae. Keywords : Uca perplexa, fiddler carb, morphometry, alometry, bengkulu
Population and Microhabitat of Uca spp. in Mangrove Conservation Area of Pantai Panjang, Bengkulu Hasan, Rusdi
Prosiding Seminar Biologi Vol 12, No 1 (2015): Seminar Nasional XII Pendidikan Biologi
Publisher : Prodi Pendidikan Biologi FKIP UNS

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Abstract

Fiddler crabs (Uca spp.) are distributed widely in tropical and subtropical areas in the world. They live in the sandy and muddy bay habitats of intertidal zone. This study aimed to find species abundance, microhabitat and population density of fiddler crabs in mangrove conservation area of Pantai Panjang, Bengkulu.  The sampling was conducted for three months started from December 2013 to February 2014. Sampling locations were decided purposively on the area consist of four microhabitats, i.e. sandy, muddy, muddy around decay plant roots and around mangrove roots. Samples of Uca were collected from 1x1 m of sixty quadrants.   The results found seven species of fiddler crabs i.e. U. perplexa, U. lactea, U. jocelynae, U. forcipata, U. triangularis, U. rosea, and U. dussumieri. They were distributed at four microhabitats. The microhabitats of U. perplexa, U. lactea, U. jocelynae, U. forcipata, U. triangularis, U. rosea, and U. dussumieri were around mangrove roots and sandy, around mangrove roots, muddy, muddy, muddy around decay plants, muddy and sandy areas, respectively. Among those species, U. perplexa was the most abundant population whereas U. dussumieri was the less one. Popolation density of fiddler crabs were U. perplexa  5.48  ind/m2, U. lactea 4.25 ind/m2, U. jocelynae , 1.47 ind/m2, U. forcipata 0.28 ind/m2,  U.triangularis 0.18 ind/m2,  U. rosea 2.17 ind/m2 and U. dussumieri 0.12 ind/m2.Key words: Mangrove, microhabitat, population, Uca spp.