POPULATION STRUCTURE AND MORPHOMETRY OF HORSESHOE CRAB Carcinoscorpius rotundicauda, Latreille 1802 IN KAMPUNG GISI COASTAL AREA OF BINTAN BAY OF RIAU ISLANDS PROVINCE

Anggraini, Rika; Bengen, Dietriech G.; Natih, Nyoman Metta N.

doi:10.28930/jitkt.v9i1.17934

Cited by 5 publications

(7 citation statements)

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“…The males C. rotundicauda had prosomal width between 10 and 13 cm while the female had prosomal width between 10 and 15 cm. These prosomal widths were larger in size than C. rotundicauda found in Bintan Bay of Riau Islands Province (Anggraini et al, 2017). The body weight for both males and females ranged 85 -165 grams and 72 -285 grams, respectively.…”

Section: Methodsmentioning

confidence: 63%

“…This hypothesis is in line with the previous studies results that these horseshoe crabs were a discarded catch by the trammel net fishing in Banyuasin Coastal Waters (Fauziyah et al, 2018). In Indonesia waters, C. rotundicauda was found in the coastal area of Bintan Bay, Riau Islands Province (Anggraini et al, 2017), T. gigas was found in coastal waters of Northern Java Island (Meilana et al, 2016), meanwhile the three Asian horseshoe crabs were found in Muara Badak Waters, Kutai Kartanegara Regency, East Kalimantan Province (Ahmad et al, 2017). In the eastern Indonesian Waters (Dolejš and Vaňousová, 2015), the horseshoe crabs were reported in Maluku waters in 1898.…”

Section: Introductionmentioning

confidence: 99%

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The first investigation record of threatened horseshoe crabs in the Banyuasin estuarine, South Sumatra, Indonesia

et al. 2019

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The first investigation of the Asian horseshoe crabs in the Banyuasin Estuarine (Indonesia) was carried out during July 16-31, 2019. Sampling was conducted together with local fishermen using a trammel net. Two species of the Asian horseshoe crabs have been identified from 52 obtained specimens, namely Carcinoscorpius rotundicauda (♂ = 18, ♀ = 27) and Tachypleus gigas (♂ = 5, ♀ = 6). The prosoma width for the two species was 100-150 mm and 115-210 mm respectively, with body weights of 72- 285 grams and 99- 918 grams, respectively. All specimens of C. rotundicauda were adults (their prosomal width ≥ 8 cm). Female was larger in size than male for both species. Its geographical distribution was from the waters near mangroves up to 4.2 km towards the sea. These results indicated that Banyuasin Waters was included in the geographical distribution coverage for both species. Further studies were needed to assess population structure, abundance, spawning ground, spawning activity, growth aspects as well as morphometric and DNA studies.

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Section: Methodsmentioning

confidence: 63%

Section: Introductionmentioning

confidence: 99%

The first investigation record of threatened horseshoe crabs in the Banyuasin estuarine, South Sumatra, Indonesia

et al. 2019

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“…Our findings support the claim that Beibu Gulf is the most suitable habitat for T. tridentatus , as six out of 14 nursery grounds in the northern Beibu Gulf had higher population densities (> 2.0 individuals/100 m 2 , Table ) than recorded in Hong Kong (Kwan et al, ; Lee & Morton, ). Our findings, however, could not be further compared with the available datasets from Taiwan, Singapore, the Philippines (Almendral & Schoppe, ; Kaiser & Schoppe, ), and Indonesia (Anggraini, Bengen, & Natih, ) which utilised different sampling methods.…”

Section: Discussionmentioning

confidence: 72%

“…To overcome this limitation, the identification of critical nursery and spawning habitats for the Asian horseshoe crabs, therefore, can be considered as the first important step (International Union for Conservation of Nature, 2012). To date, territorial-wide investigations have been conducted in Hong Kong (Kwan et al, 2016;Lee & Morton, 2016;Shin et al, 2009), Taiwan (Chen, Yeh, & Lin, 2004; (Anggraini, Bengen, & Natih, 2017) which utilised different sampling methods.…”

Section: Resultsmentioning

confidence: 99%

Nursery habitat for Asian horseshoe crabs along the northern Beibu Gulf, China: Implications for conservation management under baseline gaps

Xie

Wang

et al. 2019

Aquatic Conservation

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Identification, protection and enhancement of essential habitats are priority issues for management and restoration of exploited species. The shores utilized by Asian horseshoe crabs as nurseries were surveyed and the coastal habitat characteristics were described in the northern Beibu Gulf of China. Regression models were applied to explore species‐habitat relationships. Fourteen and ten nursery sites were identified for Tachypleus tridentatus and Carcinoscorpius rotundicauda populations, respectively. Xiacun and Jinhaiwan in the eastern region of the northern Beibu Gulf were the essential nurseries for T. tridentatus, whereas Shanxin and Jiaodong in the western part were the primary nursery shores for C. rotundicauda. These shores supported high densities (4–6 individuals/100 m2) of juvenile horseshoe crab populations. Mangrove and seagrass coverage area, coupled with sediment physico‐chemical parameters, particularly grain size, and the environmental heterogeneity of nursery habitats explained the distribution pattern of juvenile populations. Most juvenile populations were found along the outer fringe of mangroves in the small shallow estuary, particularly near outflows of tidal creeks with generally higher chlorophyll a and organic carbon contents. The distribution of high‐density juvenile populations of both species also overlapped with areas of seagrass patches. These findings highlight the importance of mangroves and seagrasses in the nursery habitat use of Asian horseshoe crabs. Preserving the estuarine habitats with these vegetation types and identifying the high‐use nursery sites should be prioritised in China and other Asian places to conserve the declining Asian horseshoe crab populations.

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“…The negative allometric growth in the PW-BW relationships also recorded in the West Coast of Peninsular Malaysia except for females in Merlimau expressed an isometric growth (Syuhaida et al, 2019). The female C. rotundicauda from Bintan Bay of Riau Islands Province indicated negative allometric growth in the CL-BW relationships but positive allometric growth for males (Anggraini et al, 2017). The differences in the relationship between body parameters for C. rotundicauda population could indirectly be affected by food availability, local environmental conditions, feeding efficiency, population density, and genetic effect (Le Cren, 1951;Jawahir et al, 2017;Panda and Naik, 2017;Srijaya et al, 2010;Vijayakumar et al, 2000).…”

Section: Discussionmentioning

confidence: 98%

The morphometric variability of the mangrove horseshoe crab (Carcinoscorpius rotundicauda) from Banyuasin estuarine of South Sumatra, Indonesia

et al. 2019

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The allometric analysis was applied to record the morphometric variability in different sex of the mangrove horseshoe crab (Carcinoscorpius rotundicauda) collected from Banyuasin estuarine of South Sumatra, Indonesia during July 2019. The body parameter measurement of body weight (BW), total length (TL), prosoma width (PW), carapace length (CL), and telson length (TL) were recorded then pooled refer to the sex. The differences in each body parameter between the males and females were observed through the Student's t-test. The length/width-weight relationship for both sexes was analyzed using the power equations while the width/length-length relationship was analyzed using the linear equations. The Student’s t-test was used to determine significant differences from the isometric value. The females of C. rotundicauda were significantly heavier and larger in size than males except for telson length (p < 0.05). Both sexes revealed a negative allometric growth for the TL/CL-BW relationships while the males indicated a negative allometric growth but the females indicated an isometric growth for the PW-BW relationships. Both sexes also indicated the isometric growth for the CL-PW relationship. The TL-PW/TEL relationship also revealed a negative allometric growth for both sexes. The study results were expected to be used as baseline data for the horseshoe crab management plan and action.

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POPULATION STRUCTURE AND MORPHOMETRY OF HORSESHOE CRAB Carcinoscorpius rotundicauda, Latreille 1802 IN KAMPUNG GISI COASTAL AREA OF BINTAN BAY OF RIAU ISLANDS PROVINCE

Abstract: ABSTRACT

Cited by 5 publications

References 5 publications

The first investigation record of threatened horseshoe crabs in the Banyuasin estuarine, South Sumatra, Indonesia

The first investigation record of threatened horseshoe crabs in the Banyuasin estuarine, South Sumatra, Indonesia

Nursery habitat for Asian horseshoe crabs along the northern Beibu Gulf, China: Implications for conservation management under baseline gaps

The morphometric variability of the mangrove horseshoe crab (Carcinoscorpius rotundicauda) from Banyuasin estuarine of South Sumatra, Indonesia

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