Using Applied Statistics for Accurate Size Classification of the Endangered Tachypleus tridentatus Horseshoe Crab

• Autorzy: Mohamed Rozihan , Paul Nur Alisa , Isa Nor Syuhaida , Damanhuri Joni Haryadi , Shahimi Salwa , Pati Siddhartha , John Akbar , Nelson Bryan Raveen

Identyfikatory

DOI

10.12911/22998993/132432

• Języki publikacji: EN

Abstrakty

EN

The Tachypleus tridentatus (Chelicerata: Xiphosura) is an arthropod that usually displays high site fidelity by restricting its distribution to natal vicinities. Briefly, shore perturbation from boating (Kudat), electric, cyanide and bombing (Kunak) and tourism (Semporna) in Sabah can impair the T. tridentatus growth and produce sexually mature adults with unusual size. The 8-point morphometry of Tachypleus tridentatus from Kudat (Sulu Sea), Kunak and Semporna (Celebes Sea), produces the final output constituting accurate size classification for the species. Meanwhile, T. tridentatus are sexually dimorphic (p = 0.968–0.989), where male T. tridentatus (from Kudat) has prosoma width (27.75 ± 2.68 cm) and weight (1050 ± 610 g) in smaller ranges when compared to the female (33.27 ± 4.68 cm; 3020 ± 1480 g) using the same comparison. In addition, the T. tridentatus populations from Kunak (prosoma width: male = 28.91 ± 1.48 cm, female = 29.44 ± 5.47 cm; weight: male = 800 ± 275 g; female = 2550 ± 155 g) and Semporna (prosoma width: male = 21.73 ± 1.34 cm, female = 24.42 ± 1.36 cm; weight: male = 485 ± 306 g, female = 1320 ± 640 g) differed site-wise. The descriptive statistics (average and standard deviation) relate 7.1–23.0% of T. tridentatus with negative size class. However, the applied statistics using stepwise analysis and regression curve (r2 = 0.566–0.833), relates 30.4% of T. tridentatus with negative size class. Considering weight to produce 100% T. tridentatus with positive size class, it is biased because some crabs are gravid with eggs and if attained unpaired (male and female), they may have recently fed. Therefore, the prosoma (male), interorbit (female) and telson lengths are identified as most appropriate for the size classification of T. tridentatus. Thus, the findings provide a novel baseline for conservation studies that monitor symmetrical and unusual growth in the T. Tridentatus wild stocks.

Słowa kluczowe

EN

conservation; fishery; indicator; horseshoe crab; ecology; wild stock

• Wydawca: Polskie Towarzystwo Inżynierii Ekologicznej ; Lublin University of Technology
• Czasopismo: Journal of Ecological Engineering
• Rocznik: 2021
• Tom: Vol. 22, nr 4
• Strony: 273--282
• Opis fizyczny: Bibliogr. 55 poz., rys., tab.

Twórcy

autor

Mohamed Rozihan

• Department of Aquaculture, Faculty of Agriculture University Putra Malaysia, 43400, Serdang Selangor, Malaysia

autor

Paul Nur Alisa

• Department of Aquaculture, Faculty of Agriculture University Putra Malaysia, 43400, Serdang Selangor, Malaysia

autor

Isa Nor Syuhaida

• Department of Aquaculture, Faculty of Agriculture University Putra Malaysia, 43400, Serdang Selangor, Malaysia

autor

Damanhuri Joni Haryadi

• Research and Development Centre for Aquaculture, Marine and Fisheries Research and Development, Jakarta Selatan 12540, Jakarta, Indonesia

autor

Shahimi Salwa

• Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu

autor

Pati Siddhartha

• Association for Biodiversity Conservation and Research, Devine Colony, Balasore, 756001 Odisha, India
• Centre of Excellence, Khallikote University, Berhampur, 761008 Ganjam, Odisha, India

autor

John Akbar

• Institute of Oceanography and Maritime Studies, Kulliyyah of Science, International Islamic University Malaysia, 25200 Kuantan, Pahang, Malaysia

autor

Nelson Bryan Raveen

• Association for Biodiversity Conservation and Research, Devine Colony, Balasore, 756001 Odisha, India
• Institute of Tropical Biodiversity and Sustainable Development, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu

• https://orcid.org/0000-0002-2461-5347

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).