Exploitation Status of Two Species of Horseshoe Crabs from Subang, West Java, Indonesia

Meilana, Lusita; Fang, Qinhua; Hakim, Lukman; Ugochukwu, Okoli Moses; Wardiatno, Yusli

doi:10.1007/978-3-030-82315-3_30

Cited by 1 publication

(1 citation statement)

References 28 publications

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“…At Pulau Bedukang, C. rotundicauda was more abundant (57.1%; 40/70) than T. gigas (40%; 28/70). Local variation in the relative abundances of these species has been observed in other studies (Meilana 2015;Fairuz-Fozi et al 2018;Zauki et al 2019), as well as for C. rotundicauda and T. tridentatus (Kwan et al 2016), and likely relates to the idiosyncratic nature of habitat distribution.…”

Section: Discussionsupporting

confidence: 57%

Population and spatial ecology of horseshoe crabs (Limulidae) in a nursery ground at Pulau Bedukang, Brunei Bay, Borneo

ROZAINI,

LAURIE,

MARSHALL

2023

Biodiversitas

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Abstract. Rozaini AF, Laurie KH, Marshall DJ. 2023. Population and spatial ecology of horseshoe crabs (Limulidae) in a nursery ground at Pulau Bedukang, Brunei Bay, Borneo. Biodiversitas 24: 4485-4492. Suitable nursery habitat to support populations of juvenile horseshoe crabs is becoming threatened globally. There are currently no formal studies on juvenile populations of the horseshoe crabs (Limulidae) for Brunei Darussalam (Brunei, Borneo). We investigated body size structure, population cohort and ecological distribution of juvenile horseshoe crabs associated with a mudflat on Pulau Bedukang, in Brunei Bay. Seventy juveniles were retrieved during four sampling days covering two seasons and four study sites. Carcinoscorpius rotundicauda and Tachypleus gigas were common, whereas only two individuals of Tachypleus tridentatus were found. Carapace width (size) was similar in the common species and there was no difference in juvenile size between the seasons and study sites. Body weight to carapace width relationships showed that the species grew at similar rates, although C. rotundicauda developed faster, producing 14 compared to the eight pre-migration mudflat instars produced by T. gigas. Species densities were similar, and there was no spatial separation of species or juvenile size across the mudflat or in relation to the mangrove forest edge. Nearest-neighbor (NN) analysis showed that individual crabs were generally dispersed. Their mudflat cohabitation suggests physiological and behavioral plesiomorphies for common optimal developmental salinity and temperature conditions. This study provides baseline information for comparison with other regional studies and for local conservation planning.

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