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Pertanika J. Trop. Agric. Sc. 42 (1): 209 - 223 (2019) TROPICAL AGRICULTURAL SCIENCE Journal homepage: http://www.pertanika.upm.edu.my/ Length-weight and Morphometric Analysis of Mud Lobster, Thalassina anomala from Sarawak, Malaysia Zakaria Nur-Nadiah1, Masnindah Malahubban1, Sharida Fakurazi2, Sie Chuong Wong3 and Amy Halimah Rajaee1* 1Department of Animal Science and Fishery, Faculty of Agriculture and Food Sciences, Universiti Putra Malaysia Bintulu Sarawak Campus, 97008 Bintulu, Sarawak, Malaysia 2Department of Human Anatomy, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia 3Department of Basic Science and Engineering, Faculty of Agriculture and Food Sciences, Universiti Putra Malaysia Bintulu Sarawak Campus, 97008 Bintulu, Sarawak, Malaysia ABSTRACT Mud lobsters (Thalassina spp.) are nocturnal organisms, belong to Order Decapoda which are lesser known and least studied although their presence were widely distributed across the Indo-West Pacific Region. Mud lobster is considered as an important organism in the mangrove ecosystem for its burrowing activities and the role of its mounds or burrows as home to other animals. All mud lobster samples collected from four distinct regions in Sarawak (Kuala Tatau, Kuala Balingian, Sarikei and Lingga) were identified asThalassina anomala based on the morphological characteristics. Morphometric variations between sexes of T. anomala were examined. Sexual dimorphism can be observed where males had significantly longer carapace length, left chelae propodus length and larger left chelae propodus width compared to females (p<0.05). Meanwhile, sexual dimorphism can also be seen in the abdominal width, in which it was significantly larger in females, for both absolute values (p<0.01) and also the relative values (p<0.001). The length-weight relationship of T. anomala were analysed between sexes by regression analysis. Results showed that males had isometric growth rate for carapace ARTICLE INFO Article history: length-weight (CL/W), total length-weight Received: 30 May 2018 Accepted: 08 October 2018 (TL/W) and abdominal length-weight Published: 26 February 2019 (ABL/W) relationships. However, females E-mail addresses: [email protected] (Zakaria Nur-Nadiah) had negative allometric growth in CL/W and [email protected] (Masnindah Malahubban) ABL/W relationship and isometric growth [email protected] (Sharida Fakurazi) [email protected] (Sie Chuong Wong) in TL/W relationship. Data from this study [email protected] (Amy Halimah Rajaee) * Corresponding author is able to provide baseline information ISSN: 1511-3701 e-ISSN: 2231-8542 © Universiti Putra Malaysia Press Zakaria Nur-Nadiah, Masnindah Malahubban, Sharida Fakurazi, Sie Chuong Wong and Amy Halimah Rajaee which are useful for future reference on mud kelanang by Moh and Chong (2009) and lobster resource management in Sarawak, T. spinirostris by Ngoc-Ho and de Saint Malaysia. Laurent (2009). Thalassina anomala is the Keywords: Length-weight, morphology, most abundant species, not only in Malaysia but also in the Indo-West Pacific region morphometric, mud lobster, Sarawak, Thalassina (Ngoc-Ho & de Saint Laurent, 2009). anomala Species identification based on INTRODUCTION morphology has been described extensively Mud lobsters (Thalassina spp.) are nocturnal in Ngoc-Ho and de Saint Laurent (2009) organisms known for their burrowing whilst verification of four species using activities. They are rarely seen and difficult morphology and molecular approach has to catch due to their habitats which are been carried out by Moh et al. (2013). far underneath the ground. They are Although there are many studies on acknowledged as an important organism morphological characteristics of the mud in mangrove ecosystem due to the role lobster, most of it are focused on species differentiation. of their volcano-like mounds as home to Morphological characteristics such as other animals. The studies of mud lobster body length and weight are an essential are still scarce, however eleven species tool in scientific studies. The length-weight of Thalassina were discovered distributed relationships are beneficial to understand across Indo-West Pacific region, namely biology and ecology of species (Kumar Thalassina anomala Herbst, 1804 (as cited in et al., 2018), estimation of growth rate Ngoc-Ho & de Saint Laurent, 2009, p. 121), (da Rocha et al., 2015), size at maturity T. emerii Bell, 1844 (as cited in Ngoc-Ho & (Waiho et al., 2016) and male-female de Saint Laurent, 2009, p. 121), T. gracilis differentiation (Wang et al., 2011). On Dana, 1852 (as cited in Ngoc-Ho & de Saint the other hand, morphometric analysis Laurent, 2009, p. 121), T. squamifera De has been widely conducted for studies on Man, 1915 (as cited in Ngoc-Ho & de Saint relative growth (Vasileva et al., 2017). Laurent, 2009, p. 121), T. kelanang (Moh This study reported on length-weight & Chong, 2009), T. krempfi (Ngoc-Ho & de relationships and morphometric analysis of Saint Laurent, 2009), T. spinirostris (Ngoc- T. anomala collected from four locations Ho & de Saint Laurent, 2009), T. spinosa in Sarawak, Malaysia namely Kuala Tatau (Ngoc-Ho & de Saint Laurent, 2009), T. (Bintulu), Kuala Balingian (Mukah), australiensis (Sakai & Türkay, 2012), T. Sarikei and Lingga (Sri Aman). Given the saetichelis (Sakai & Türkay, 2012) and T. difficulty in obtaining substantial number of pratas (Lin et al., 2016). In Malaysia, four organisms per sampling location, samples species of Thalassina have been reported from all locations were pooled in order to which are Thalassina anomala by De Man determine length-weight relationships and (1928), T. gracilis by Sasekumar (1974), T. morphometric analyses. 210 Pertanika J. Trop. Agric. Sc. 42 (1): 209 - 223 (2019) Length-weight and Morphometric Analysis of Mud Lobster MATERIALS AND METHODS Balingian, Mukah (3o 00’36.9”N, o Sample Collections 112 35’26.0”E), 6 samples from Lingga, Sri Aman (1o14’01.2”N, 111o27’49.5”E) A total of 70 samples (37 males and 33 and 2 samples from Sarikei (2o07’55.5”N, females) were purchased from local people 111o30’59.8”E). All samples were weighed from four distinct locations in Sarawak with a digital weight and measured with a from March 2016 until May 2017 (Figure digital caliper with a precision of 0.01mm. 1). Fifty four samples were collected Samples were kept in ice during transport to from Kuala Tatau, Bintulu (3o05’42.8”N, laboratory prior to further analyses. 112o51’56.0”E), 8 samples from Kuala Figure 1. Sampling locations of mud lobster in Sarawak, Malaysia Species and Sex Identification to location of the gonopores. For male, Species identification was carried out using gonopores were located on inner ventral morphological characteristics as explain surface of coxa of pereopod 5, meanwhile in Moh and Chong (2009) and Moh et al. for females of the pereopod 3. Females (2013). Focus were made to certain features also have longer pleopods, with pleopod to differentiate the species such as carapace, 2-5 being biramous bearing long setae for rostrum and abdominal somite (Figure 2). carrying eggs during breeding season. Sex identification was determined according Pertanika J. Trop. Agric. Sc. 42 (1): 209 - 223 (2019) 211 Zakaria Nur-Nadiah, Masnindah Malahubban, Sharida Fakurazi, Sie Chuong Wong and Amy Halimah Rajaee Figure 2. Thalassina anomala, female (TL/CL, 252.09/82.70mm). (a) = Dorsal view of carapace, (b) = Dorsal view of cephalothorax, (c) = Dorsal view of first abdominal somite. Scale bars, (a) = 30mm, (b) = 10mm, (c) = 10mm Morphometric Analysis ABL and ABW, while Figure 3b showed Each individual sample was measured for 9 measurements of CPL, CPH and CPW. morphological characteristics; total length CPL (TL), carapace length (CL), carapace width (CW), abdomen length (ABL), abdomen CPH width (ABW), chelae propodus length CPW (CPL), chelae propodus height (CPH), chelae propodus width (CPW) and wet weight (WW). Specimens with damaged or missing cheliped were not used for any propodus measurements. Figure 3a Figure 3b. Morphometric measurements of cheliped mud lobster. CPL = chelae propodus length, CPH = showed measurements of TL, CL, CW, chelae propodus height, CPW = chelae propodus width Figure 3a. Morphometric measurements of mud lobster. TL = total length, CL = carapace length, CW = carapace width, ABL = abdomen length, ABW = abdomen width 212 Pertanika J. Trop. Agric. Sc. 42 (1): 209 - 223 (2019) Length-weight and Morphometric Analysis of Mud Lobster Data Analysis Positive allometry means weight is The relative values of variables CL, CW, gaining faster than length. All statistical tests ABL, ABW, WW, CPL, CPW and CPH were carried out using Microsoft Excel 2013 were calculated on the basis of their absolute and IBM SPSS version 20 software (SPSS values versus total length. Comparisons Inc., Chicago, USA). between sexes were analysed by means of a Student’s t-test where the degree of RESULTS AND DISCUSSION probability was p<0.05*, p<0.01** or Species Identification p<0.001***. Based on the morphological characteristics, A linear regression analysis was used all 70 samples were identified asThalassina to analyse length-weight relationship of the anomala. Rostrum for all samples were specimens between sexes. The analysis was triangular in shape, with a shallow median based on the allometric equation: sulcus (groove) that did not extend beyond W = aLb (1) the adostrals, identical to T. anomala and T. squamifera. In T. kelanang, the rostrum (Hartnoll, 1978). The log transformed is waisted with an acute tip and a deep data was calculated using the formula: median sulcus (groove) that reaches behind the adostrals. In addition, tergite of first Log W = b log L + log a (2) abdominal somite of all samples has two petaloid depressions in the form of an where a = intercept, b = slope of inverted V which is also in agreement with regression line, W = wet weight of the morphology of T. anomala. Other species specimens (g) and L = total length (mm). such as T. kelanang and T. squamifera The b values obtained from all the samples have an inverted Y groove instead (Moh were compared using t-test to investigate & Chong, 2009).
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  • Taxonomy, Biology and Distribution of Lobsters

    Taxonomy, Biology and Distribution of Lobsters

    Taxonomy, Biology and Distribution of Lobsters 15 Rekha Devi Chakraborty and E.V.Radhakrishnan Crustacean Fisheries Division, Central Marine Fisheries Research Institute, Kochi-682 018 Lobsters are among the most prized of fisheries resources and of significant commercial interest in many countries. Because of their high value and esteemed culinary worth, much attention has been paid to lobsters in biological, fisheries, and systematic literature. They have a great demand in the domestic market as a delicacy and is a foreign exchange earner for the country. Taxonomic status Phylum: Arthropoda Subphylum: Crustacea Class: Malacostraca Subclass: Eumalacostraca Superorder: Eucarida Order: Decapoda Suborder: Macrura Reptantia The suborder Macrura Reptantia consists of three infraorders: Astacidea (Marine lobsters and freshwater crayfishes), Palinuridea (Spiny lobsters and slipper lobsters) and Thalassinidea (mud lobsters). The infraorder Astacidea Summer School on Recent Advances in Marine Biodiversity Conservation and Management 100 Rekha Devi Chakraborty and E.V.Radhakrishnan contains three superfamilies of which only one (the Infraorder Palinuridea, Superfamily Eryonoidea, Family Nephropoidea) is considered here. The remaining two Polychelidae superfamilies (Astacoidea and parastacoidea) contain the 1b. Third pereiopod never with a true chela,in most groups freshwater crayfishes. The superfamily Nephropoidea (40 chelae also absent from first and second pereiopods species) consists almost entirely of commercial or potentially 3a Antennal flagellum reduced to a single broad and flat commercial species. segment, similar to the other antennal segments ..... Infraorder Palinuridea, Superfamily Palinuroidea, The infraorder Palinuridea also contains three superfamilies Family Scyllaridae (Eryonoidea, Glypheoidea and Palinuroidea) all of which are 3b Antennal flagellum long, multi-articulate, flexible, whip- marine. The Eryonoidea are deepwater species of insignificant like, or more rigid commercial interest.