DOCSLIB.ORG

Comparative Taxonomic Evaluation of Thais Species (Order: Gastropoda; Family: Muricidae) of Mollusca from Maharashtra Coast of India

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Comparative Taxonomic Evaluation of Thais Species (Order: Gastropoda; Family: Muricidae) of Mollusca from Maharashtra Coast of India Indian Journal of Geo Marine Sciences Vol. 46 (06), June 2017, pp. 1098-1104 Comparative taxonomic evaluation of Thais species (Order: Gastropoda; Family: Muricidae) of Mollusca from Maharashtra coast of India Ravi Kumar1, A.K. Jaiswar1, S. Jahageerdar1, S.K. Chakraborty1, A. Pavan Kumar1 & Laxmi Prasad2 1Central Institute of Fisheries Education (ICAR), Mumbai, Maharashtra - 400061, India 2Narendra Dev University of Agriculture & Technology, Kumarganj, Faizabad, U.P. -224229, India [Email- [email protected]] Received 17 December 2014 ; revised 15 November 2016 Based on shell morphology alone, it was difficult to differentiate the species belonging to genus Thais because of large amount of plasticity, observed in the shell characters. The colour of the shells was poorly defined as species identifying character in Thais species. The morphometric and meristic characters of the shell along with radular characters can solve the taxonomic ambiguities in Thais species (Thais lacera; T. blanfordi; T. tissoti; T. rudolphi; T. bufo and T. subnodulosa). The radular morphology was found to be different in each species except in T. rudolphi and T. blanfordi and hence these two species were differentiated based on radular morphology where the first denticle on outer base of the lateral cusp was smaller than other five denticles in T. rudolphi but in T. blanfordi, all were same in size. A deep ‘V’ shaped notch was present between inner denticle base of lateral cusp and central cusp in T. blanfordi, which was found to be a species specific character. [Keywords: Thais, Muricidae, Gastropods, Mollusca, radular] Introduction 5 Molluscs have been evolved about 500 of phylogeny for Thaidid gastropods . In India million years ago during the Cambrian period1. molluscan fishery is contributing significantly in Among the classes of Mollusca, Gastropoda is total marine fishery. They form an important part most diverse group consisting of 80 per cent of all of food of coastal population, in preparation of the molluscs numbering to around 80,000-100,000 decorative items and in lime industry, and are species. Appukuttan, reported 3271 species important link in marine food web. However, the belonging to 220 families and 591 genera, previous studies did not explain in detail including 1900 species of gastropods, 1100 taxonomy for majority of Thaidids, which aid to pelecypods, 210 cephalopods, 41 polyplacophores differentiate them easily. In view of this, the and 20 scaphopods from India2. Among the present study attempted to describe the gastropods, muricids shell exhibits highest degree identification of six Thais species occurring along of variations with regards to shell morphology and the Maharashtra coast of India based on shell sculptural patterns, which demonstrate its morphology and radular structure. 3 evolutionary importance . Materials and Methods Taxonomic studies of the gastropods have For the present study, a total of 177 specimens been carried out by researchers using shell belonging to six different species of Thais morphology, sculpture, micro-structure, radula comprising of Thais lacera (41); T. blanfordi (50); and anatomical characters, operculum structure T. tissoti (50); T. rudolphi (20); T. bufo (10) and and meristic counts. In Thais species the radula T. subnodulosa (6) were collected from different is stenoglossan (rachiglossan) type and usually coastal areas, Juhu Kolivada, Bandstand, Aksa has three cusps and smaller denticles. Radular beach, Versova beach, Shrivardhan, Alibaug and characters have also been widely used in species Ratnagiri along the Maharashtra coast of India. diagnosis4,and, considered as valid indicators The species were identified by using identification INDIAN J. MAR. SCI., VOL. 46, NO. 06, JUNE 2017 1099 keys and publications1, 2-10. A total of seven removal of animal out of shell without any morphometric characters, shell length (SL), shell damage. In case of any difficulty to draw out the width (SW), body whorl length (BWL), aperture animal from shell, the shells were kept in deep length (APL), aperture width (APW), shell weight freeze at -200C for 24 hours resulting in shrinkage (SWT) and animal weight (AWT) were measured of muscle part. It is necessary to thaw them for from the collected specimens. Similarly, four 15-20 minutes in tap water before pulling out meristic traits like number of whorls (NW), animal from frozen shells. Subsequently the number of primary spiral cords bearing extracted animals were washed and cleaned nodules/tubercles on body whorl (NPBW), thoroughly; an incision was made on dorsal number of ridges or teeth inside of outer lip of the surface of the head with the help of scalpel and aperture (NRL) and number of tubercles in first scissor, a few millimetres away from the base of spiral row on shoulder of body whorl bearing tentacles or mouth opening to expose out radular nodules/tubercles (NT) were counted. The length sac. The sac was lifted out carefully with the help (mm) variables were measured using digital of forceps and transferred to 20% NaOH solution. Vernier callipers and weight (g) with a digital Later the solution was boiled for 5-8 minutes at weighing balance. 1000C in order to dissolve the attached tissue that resulted in release of radula into the solution. The radula was picked up from solution with the help of forceps and washed in distilled water and absolute alcohol for 2-3 times to dehydrate and clean the radula. For further examination, the radulae were mounted on a clean glass slide with a drop of glycerine and examined under compound microscope. The radula was photographed by fixing the target at maximum resolution with provided zooming power (10X & 40X) followed by fixing the lens of digital camera on the eyepiece of compound microscope. Fig 1. (A). T. Lacera (i). six whorls, (ii). two spiral ridges on body whorl bearing strong triangular tubercles. (B) (i). two grooved sulcus instead of anal sulcus, (ii). Well developed umbilical chink; (2). T. rudolphi (C) (i).five whorls, (ii). Five primary spiral cords on body whorl, (D) (i).primary spiral cords bearing alternate brown and white nodules; (3). T. subnodulosa (E) (i).six whorls, (ii). A white spiral strip between third and fourth spiral cords on body whorl (F) (i). four Fig. 2 Characteristics of radula, 1. T. blanfordi, 2.T. bufo, 3. T. lacera, 4. T. rudolphi, 5. T. subnodulosa and, 6. T. tissoti ridges or teeth inside of outer lip of the aperture; (4). T. tissoti (G) (i).five whorls, (ii). secondary grooved spiral cords in between of the cc- central cusp, lc- lateral cusp, idlc- inner each primary spiral cord on body whorl, (H) (i). four primary spiral denticle on lateral cusp, mc-marginal cusp, d- cords, (ii). five ridges or teeth inside of outer lip of the aperture; (5). denticles between marginal and lateral cusp. T. bufo (I) (i).five whorls, (ii).two primary spiral cords bearing blunt tubercles; (6). T. blanfordi (J) (i).five whorls, (K) (i). ). six ridges or teeth inside of outer lip of the aperture. Statistical analysis PROC MEANS procedure (SAS Institute, Extraction of radula 2012) was used to estimate the descriptive Live specimens were anesthetized by injecting statistics. PROC FREQ procedure was used to 7.5% of MgCl2 to relax, loosen the muscles create frequency and cross-tabulation tables for attached to the inner shell surface, facilitated easy meristic traits. 1100 KUMAR et al.: COMPARATIVE TAXONOMIC EVALUATION OF THAIS Table.1: Descriptive statistics of the morphometric traits Species Statistics Variable T. subnodulosa T. tissoti T. lacera T. rudolphi T. blanfordi T. bufo SL 18.25±1.306 18.15±0.400 41.82±1.367 45.18±3.134 26.03±0.373 38.64±3.893 BWL 12.23±0.745 9.84±0.282 29.99±1.043 37.08±2.481 18.22±0.281 32.22±3.723 SW 9.27±0.769 11.31±0.189 26.65±1.006 28.45±1.752 15.42±0.207 27.16±3.413 Mean±SE OPL 10.49±0.637 9.40±0.299 24.97±0.713 33.60±2.209 15.55±0.207 29.52±3.417 OPW 3.46±0.279 5.12±0.128 11.33±0.364 14.09±0.887 6.76±0.118 12.97±1.641 SWT 1.78±0.401 1.12±0.088 13.19±1.0458 13.49±2.035 3.09±0.125 12.71±4.588 AWT 0.19±0.030 0.16±0.011 2.17±0.154 3.68±0.682 0.36±0.015 3.31±1.620 SL 14.23 10.84 25.55 27.14 19.11 27.14 BWL 9.92 6.86 18.75 20.91 14.58 20.91 SW 6.85 7.14 17.02 17.04 12.18 17.04 Minimum OPL 8.42 6.31 17.19 19.49 12.75 19.49 OPW 2.66 3.67 7.42 6.62 5.06 6.62 SWT 0.63 0.21 2.58 2.94 1.35 2.94 AWT 0.10 0.06 0.87 0.59 0.14 0.59 SL 21.78 26.27 58.76 70.57 29.83 60.85 BWL 13.97 14.97 41.54 53.07 21.96 53.89 SW 11.41 15.92 39.68 41.58 19.05 47.56 Maximum APL 12.19 14.75 32.91 47.65 18.45 47.61 APW 4.31 7.39 15.72 20.07 8.32 22.49 SWT 3.19 3.59 22.43 35.92 4.59 47.31 AWT 0.27 0.39 4.07 8.83 0.56 15.91 Where, SL (Shell Length), SW (Shell Width), BWL (Body Whorl Length), APL (Aperture Length), APW (Aperture Width), SWT (Shell Weight) and AWT (Animal Weight) Table 2.
Load more

Recommended publications
  • REVISED Marine Molluscs in Nearshore Habitats of the United
    1 REVISED 2 3 Marine Molluscs in Nearshore Habitats of the United Arab Emirates: 4 Decadal Changes and Species of Public Health Significance 5 6 Raymond E. Grizzle1*, V. Monica Bricelj2, Rashid M. AlShihi3, Krystin M. Ward1, and 7 Donald M. Anderson4 8 9 1Jackson Estuarine Laboratory 10 University of New Hampshire 11 Durham, NH 03824, U.S.A. 12 [email protected] 13 14 2Department of Marine and Coastal Sciences 15 Haskin Shellfish Laboratory, Rutgers University, NJ 08349, U.S.A. 16 17 3Ministry of Climate Change and Environment 18 Marine Environment Research Centre, Umm Al Quwain, U.A.E. 19 20 4Biology Department, Woods Hole Oceanographic Institution 21 Woods Hole, MA 02543, U.S.A. 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 LRH: Grizzle, Bricelj, AlShihi, Ward, Anderson 41 42 RRH: Marine Molluscs in the United Arab Emirates 43 44 45 46 1 47 ABSTRACT 48 49 This paper describes the results of three qualitative surveys of marine molluscs conducted in 50 December 2010 and May 2011 and 2012 in nearshore benthic habitats along the Arabian Gulf and 51 Gulf of Oman coasts of the United Arab Emirates. Findings are compared to historical studies, 52 focusing on extensive surveys from the 1960s and 1970s. Molluscan species of public health 53 significance are identified based on their potential as vectors of algal toxins in light of the recent 54 occurrence of harmful algal blooms (HABs) in the region. Habitats sampled included intertidal 55 sand or gravel beaches, rocks and jetties, sheltered soft-sediment flats and mangroves, and shallow 56 subtidal coral reefs.
    [Show full text]
  • The Gastropod Thais Haemastoma in Georgia: T. H. Floridana Or T. H
    Gulf and Caribbean Research Volume 7 Issue 2 January 1982 The Gastropod Thais haemastoma in Georgia: T. h. floridana or T. h. canaliculata? Randal L. Walker Skidaway Institute of Oceanography Follow this and additional works at: https://aquila.usm.edu/gcr Part of the Marine Biology Commons Recommended Citation Walker, R. L. 1982. The Gastropod Thais haemastoma in Georgia: T. h. floridana or T. h. canaliculata?. Gulf Research Reports 7 (2): 183-184. Retrieved from https://aquila.usm.edu/gcr/vol7/iss2/15 DOI: https://doi.org/10.18785/grr.0702.15 This Short Communication is brought to you for free and open access by The Aquila Digital Community. It has been accepted for inclusion in Gulf and Caribbean Research by an authorized editor of The Aquila Digital Community. For more information, please contact [email protected]. GulfResearch Reports, Vol. 7, No. 2,183-184.1982 THE GASTROPOD THAIS HAEMASTOMA IN GEORGIA: T. H. FLORIDANA OR T. H. CANALICULATA? RANDALL. WALKER Skidaway Institute of Oceanography Savannah, Georgia 31406 ABSTRACT In the southeastern United States, the snail Thais haemastoma has traditionally been subdivided into two subspecies according to the snail‘s locale, size of shell, number and size of spines, and depth of suture. Only Thais haemastoma floridana is supposed to occur in Georgia; since Thais haemastoma canalicukta is supposedly restricted to the Gulf of Mexico region. In Georgia, specimens fitting the description of both subspecies are common. The author concurs with the conclusions of Butler (1953) and Cunter (1979) in that the subspecies nomenclature is invalid and that they are merely ecological variants.
    [Show full text]
  • Carter Li and Rachel Collin
    Imposex in One of the World’s Busiest Shipping Zones Carter Li and Rachel Collin ABSTRACT. Tributyltin pollution from antifouling paint is well known to disrupt the en- docrine system in female marine gastropods. The masculinization of females, including the aberrant growth of a penis and vas deferens and occlusion of the capsule gland, has been reported primarily in neogastropods and is particularly well documented in muricids. Com- pared to temperate areas, few studies of imposex have been undertaken in the tropics, and there are few studies in general on non-neogastropods. Here we report a high frequency of imposex near the Pacifi c mouth of the Panama Canal in two species of muricids and two species of calyptraeids. The frequency of imposex declined rapidly with distance away from the canal, and several species appeared to be mostly normal less than 10 km from the en- trance. This is the fi rst report of imposex in Acanthais brevidentata, Thaisella kiosquiformis, Bostrycapulus calyptraeformis, Crepidula cf. nivea, and Anachis fl uctuata. Because imposex has not previously been reported for the Calyptraeidae, a family of protandrous gastropods, a laboratory study was conducted to verify that imposex was not simply retention of the penis after sex change. The 2007 ratifi cation of the International Maritime Organization’s convention on antifouling systems should reduce the levels of TBT worldwide, but the persis- tence of this compound in sediments suggests that imposex may continue to be a problem at the mouth of the canal as routine dredging and large tides frequently resuspend sediment. INTRODUCTION Tributyltin (TBT) is well known to be a highly effective antifouling agent, used primarily on ship hulls, but it has numerous detrimental effects on a wide variety of non-target taxa.
    [Show full text]
  • Checklist of Marine Gastropods Around Tarapur Atomic Power Station (TAPS), West Coast of India Ambekar AA1*, Priti Kubal1, Sivaperumal P2 and Chandra Prakash1
    www.symbiosisonline.org Symbiosis www.symbiosisonlinepublishing.com ISSN Online: 2475-4706 Research Article International Journal of Marine Biology and Research Open Access Checklist of Marine Gastropods around Tarapur Atomic Power Station (TAPS), West Coast of India Ambekar AA1*, Priti Kubal1, Sivaperumal P2 and Chandra Prakash1 1ICAR-Central Institute of Fisheries Education, Panch Marg, Off Yari Road, Versova, Andheri West, Mumbai - 400061 2Center for Environmental Nuclear Research, Directorate of Research SRM Institute of Science and Technology, Kattankulathur-603 203 Received: July 30, 2018; Accepted: August 10, 2018; Published: September 04, 2018 *Corresponding author: Ambekar AA, Senior Research Fellow, ICAR-Central Institute of Fisheries Education, Off Yari Road, Versova, Andheri West, Mumbai-400061, Maharashtra, India, E-mail: [email protected] The change in spatial scale often supposed to alter the Abstract The present study was carried out to assess the marine gastropods checklist around ecologically importance area of Tarapur atomic diversity pattern, in the sense that an increased in scale could power station intertidal area. In three tidal zone areas, quadrate provide more resources to species and that promote an increased sampling method was adopted and the intertidal marine gastropods arein diversity interlinks [9]. for Inthe case study of invertebratesof morphological the secondand ecological largest group on earth is Mollusc [7]. Intertidal molluscan communities parameters of water and sediments are also done. A total of 51 were collected and identified up to species level. Physico chemical convergence between geographically and temporally isolated family dominant it composed 20% followed by Neritidae (12%), intertidal gastropods species were identified; among them Muricidae communities [13].
    [Show full text]
  • Do Singapore's Seawalls Host Non-Native Marine Molluscs?
    Aquatic Invasions (2018) Volume 13, Issue 3: 365–378 DOI: https://doi.org/10.3391/ai.2018.13.3.05 Open Access © 2018 The Author(s). Journal compilation © 2018 REABIC Research Article Do Singapore’s seawalls host non-native marine molluscs? Wen Ting Tan1, Lynette H.L. Loke1, Darren C.J. Yeo2, Siong Kiat Tan3 and Peter A. Todd1,* 1Experimental Marine Ecology Laboratory, Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Block S3, #02-05, Singapore 117543 2Freshwater & Invasion Biology Laboratory, Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Block S3, #02-05, Singapore 117543 3Lee Kong Chian Natural History Museum, Faculty of Science, National University of Singapore, 2 Conservatory Drive, Singapore 117377 *Corresponding author E-mail: [email protected] Received: 9 March 2018 / Accepted: 8 August 2018 / Published online: 17 September 2018 Handling editor: Cynthia McKenzie Abstract Marine urbanization and the construction of artificial coastal structures such as seawalls have been implicated in the spread of non-native marine species for a variety of reasons, the most common being that seawalls provide unoccupied niches for alien colonisation. If urbanisation is accompanied by a concomitant increase in shipping then this may also be a factor, i.e. increased propagule pressure of non-native species due to translocation beyond their native range via the hulls of ships and/or in ballast water. Singapore is potentially highly vulnerable to invasion by non-native marine species as its coastline comprises over 60% seawall and it is one of the world’s busiest ports. The aim of this study is to investigate the native, non-native, and cryptogenic molluscs found on Singapore’s seawalls.
    [Show full text]
  • Imposex in Thaisella Chocolata (Duclos, 1832) (Gastropoda: Muricidae) Caldera Bay, Chile
    Lat. Am. J. Aquat. Res., 44(4): 825-834, 2016 Imposex syndrome of female Thaisella chocolata 825 DOI: 10.3856/vol44-issue4-fulltext-18 Research Article Imposex in Thaisella chocolata (Duclos, 1832) (Gastropoda: Muricidae) Caldera Bay, Chile Yasna Mattos1 & María Soledad Romero1 1Departamento de Biología Marina, Facultad de Ciencias del Mar Universidad Católica del Norte Coquimbo, Chile Corresponding author: Yasna Mattos ([email protected]) ABSTRACT. Imposex syndrome is the superimposition of a pseudopenis and vas deferens in the reproductive system of female gastropods. This anomalous virilization is attributed to a hormonal imbalance induced by tributyltin (TBT), an organotin compound, present in antifouling paints. This study analyzes the severity, extent, degree and indices of imposex in a population of Thaisella chocolata from Caldera Bay, Atacama Region, Chile. Sex was determined by biopsy of the gonad from 180 specimens and imposex by the concurrence of ovarian, capsule gland, vas deferens and pseudopenis in abnormal females. The proportion of females affected with imposex was estimated using the formula described by Gibbs et al. (1987). The degree of the syndrome progress was classified using five scales of imposex and Vas Deferens Sequence Index (VDSI), Relative Penis Index (RPSI) and Relative Penis Size Index (RPSI) were calculated. Results show that 100% of the females of T. chocolata from Caldera Bay suffer imposex. Macroscopic analysis revealed atrophy of the vagina and femenine glands. Some females lacked ingestive gland and seminal receptacle. Cytological disorders as modification of internal epithelium, occurrence of acellular areas, lack of basal lamina and presence of pyknotic nuclei, and overlapping of prostate tissue in the three females’ glands were found.
    [Show full text]
  • Are the Traditional Medical Uses of Muricidae Molluscs Substantiated by Their Pharmacological Properties and Bioactive Compounds?
    Mar. Drugs 2015, 13, 5237-5275; doi:10.3390/md13085237 OPEN ACCESS marine drugs ISSN 1660-3397 www.mdpi.com/journal/marinedrugs Review Are the Traditional Medical Uses of Muricidae Molluscs Substantiated by Their Pharmacological Properties and Bioactive Compounds? Kirsten Benkendorff 1,*, David Rudd 2, Bijayalakshmi Devi Nongmaithem 1, Lei Liu 3, Fiona Young 4,5, Vicki Edwards 4,5, Cathy Avila 6 and Catherine A. Abbott 2,5 1 Marine Ecology Research Centre, School of Environment, Science and Engineering, Southern Cross University, G.P.O. Box 157, Lismore, NSW 2480, Australia; E-Mail: [email protected] 2 School of Biological Sciences, Flinders University, G.P.O. Box 2100, Adelaide 5001, Australia; E-Mails: [email protected] (D.R.); [email protected] (C.A.A.) 3 Southern Cross Plant Science, Southern Cross University, G.P.O. Box 157, Lismore, NSW 2480, Australia; E-Mail: [email protected] 4 Medical Biotechnology, Flinders University, G.P.O. Box 2100, Adelaide 5001, Australia; E-Mails: [email protected] (F.Y.); [email protected] (V.E.) 5 Flinders Centre for Innovation in Cancer, Flinders University, G.P.O. Box 2100, Adelaide 5001, Australia 6 School of Health Science, Southern Cross University, G.P.O. Box 157, Lismore, NSW 2480, Australia; E-Mail: [email protected] * Author to whom correspondence should be addressed; E-Mail: [email protected]; Tel.: +61-2-8201-3577. Academic Editor: Peer B. Jacobson Received: 2 July 2015 / Accepted: 7 August 2015 / Published: 18 August 2015 Abstract: Marine molluscs from the family Muricidae hold great potential for development as a source of therapeutically useful compounds.
    [Show full text]
  • Chec List Marine and Coastal Biodiversity of Oaxaca, Mexico
    Check List 9(2): 329–390, 2013 © 2013 Check List and Authors Chec List ISSN 1809-127X (available at www.checklist.org.br) Journal of species lists and distribution ǡ PECIES * S ǤǦ ǡÀ ÀǦǡ Ǧ ǡ OF ×±×Ǧ±ǡ ÀǦǡ Ǧ ǡ ISTS María Torres-Huerta, Alberto Montoya-Márquez and Norma A. Barrientos-Luján L ǡ ǡǡǡǤͶ͹ǡ͹ͲͻͲʹǡǡ ǡ ȗ ǤǦǣ[email protected] ćĘęėĆĈęǣ ϐ Ǣ ǡǡ ϐǤǡ ǤǣͳȌ ǢʹȌ Ǥͳͻͺ ǯϐ ʹǡͳͷ͹ ǡͳͷ ȋǡȌǤǡϐ ǡ Ǥǡϐ Ǣ ǡʹͶʹȋͳͳǤʹΨȌ ǡ groups (annelids, crustaceans and mollusks) represent about 44.0% (949 species) of all species recorded, while the ͹͸ʹ ȋ͵ͷǤ͵ΨȌǤǡ not yet been recorded on the Oaxaca coast, including some platyhelminthes, rotifers, nematodes, oligochaetes, sipunculids, echiurans, tardigrades, pycnogonids, some crustaceans, brachiopods, chaetognaths, ascidians and cephalochordates. The ϐϐǢ Ǥ ēęėĔĉĚĈęĎĔē Madrigal and Andreu-Sánchez 2010; Jarquín-González The state of Oaxaca in southern Mexico (Figure 1) is and García-Madrigal 2010), mollusks (Rodríguez-Palacios known to harbor the highest continental faunistic and et al. 1988; Holguín-Quiñones and González-Pedraza ϐ ȋ Ǧ± et al. 1989; de León-Herrera 2000; Ramírez-González and ʹͲͲͶȌǤ Ǧ Barrientos-Luján 2007; Zamorano et al. 2008, 2010; Ríos- ǡ Jara et al. 2009; Reyes-Gómez et al. 2010), echinoderms (Benítez-Villalobos 2001; Zamorano et al. 2006; Benítez- ϐ Villalobos et alǤʹͲͲͺȌǡϐȋͳͻ͹ͻǢǦ Ǥ ǡ 1982; Tapia-García et alǤ ͳͻͻͷǢ ͳͻͻͺǢ Ǧ ϐ (cf. García-Mendoza et al. 2004). ǡ ǡ studies among taxonomic groups are not homogeneous: longer than others. Some of the main taxonomic groups ȋ ÀʹͲͲʹǢǦʹͲͲ͵ǢǦet al.
    [Show full text]
  • Mollusca, Neogastropoda: Muricidae) Da Costa Brasileira, Baseado Em Anatomia Comparada
    UNIVERSIDADE DE SÃO PAULO MUSEU DE ZOOLOGIA NATAN CARVALHO PEDRO Estudo taxonômico do gênero Thaisella Clench, 1947 (Mollusca, Neogastropoda: Muricidae) da costa brasileira, baseado em anatomia comparada Taxonomic study of the genus Thaisella Clench, 1947 (Mollusca, Neogastropoda: Muricidae) from the Brazilian coast, based on comparative anatomy v.1 São Paulo 2020 NATAN CARVALHO PEDRO Estudo taxonômico do gênero Thaisella Clench, 1947 (Mollusca, Neogastropoda: Muricidae) da costa brasileira, baseado em anatomia comparada Taxonomic study of the genus Thaisella Clench, 1947 (Mollusca, Neogastropoda: Muricidae) from the Brazilian coast, based on comparative anatomy v.1 Versão Corrigida Dissertação submetida ao Programa de Pós- Graduação do Museu de Zoologia da Universidade de São Paulo em cumprimento parcial aos requisitos para a obtenção do título de Mestre em Ciências (Sistemática, Taxonomia Animal e Biodiversidade). Orientador: Prof. Dr. Luiz Ricardo Lopes de Simone São Paulo 2020 Não autorizo a reprodução e divulgação total ou parcial deste trabalho, por qualquer meio convencional ou eletrônico. Catalogação na Publicação Serviço de Biblioteca e Documentação Museu de Zoologia da Universidade de São Paulo Pedro, Natan Carvalho Estudo taxonômico do gênero Thaisella Clench, 1947 (Mollusca Neogastropoda: Muricidae) da costa brasileira, baseado em anatomia comparada.= Taxonomic study of the genus Thaisella Clench, 1947 (Mollusca Neogastropoda: Muricidae) from the Brazilian coast, based on comparative anatomy/ Natan Carvalho Pedro; orientador Luiz Ricardo Lopes de Simone. São Paulo, 2020. 136p. Dissertação de Mestrado – Programa de Pós-Graduação em Sistemática, Taxonômia e Biodiversidade, Museu de Zoologia, Universidade de São Paulo, 2020. Versão original 1. Mollusca - Neogastropoda. 2. Muricidae - Costa brasileira. 3. Muricidae – Mollusca – Anatomia comparada . I.
    [Show full text]
  • Imposex En Crassilabrum Crassilabrum (Neogastropoda: Muricidae) En La Costa Central Del Perú
    Rev Inv Vet Perú 2017; 28(4): 834-842 http://dx.doi.org/10.15381/rivep.v28i4.13873 Imposex en Crassilabrum crassilabrum (Neogastropoda: Muricidae) en la Costa Central del Perú IMPOSEX IN CRASSILABRUM CRASSILABRUM (NEOGASTROPODA: MURICIDAE) IN THE PERUVIAN CENTRAL COAST Rolf Rivas1, Renzo Pradel1, Soledad Hurtado1, Dayanne Cornelio1, Jorge Mendoza1, Angélica Guabloche1, José Iannacone2,3, Lorena Alvariño1, Luz Castañeda1 RESUMEN El imposex es un fenómeno que consiste en el desarrollo de caracteres sexuales masculinos sobre el sistema reproductivo de las hembras de caracoles gasterópodos por la contaminación por compuestos organoestañosos (OTs), como el tributil estaño (TBT). En el presente trabajo se evaluó el imposex en Crassilabrum crassilabrum Sowerby, 1834 (Neogastropoda: Muricidae) proveniente de la costa central del Perú, para lo cual se analizaron individuos colectados de la zona intermareal de Pucusana y Ancón, Lima. Se tomaron medidas biométricas y se calcularon los índices de imposex. El porcentaje de imposex en Ancón fue del 98% y en Pucusana de 100%. El índice de la longitud relativa del pene (RPLI) fue de 52.3% y 44.5% para Pucusana y Ancón, respectivamente. Una relación significativa fue encontrada entre la longitud de la conchilla y la longitud del pene en machos en ambas playas, pero no así en las hembras. Crassilabrum crassilabrum es un molusco con aplicación para emplearse como un bioindicador de componentes OTs en la costa central del Perú y en el Pacífico sudamericano. Palabras clave: Crassilabrum crassilabrum; imposex; organoestañosos; Pacífico Sur; Perú; caracol ABSTRACT The imposex is a phenomenon that consists in the development of masculine sexual characteristics on the reproductive system of the gastropod female snails by organotin compounds (OTs), like tributyl tin (TBT).
    [Show full text]
  • Note DNA Barcoding of Thais Species (Family: Muricidae) from West Coast
    See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/279524315 DNA barcoding of Thais species (Family: Muricidae) from west coast of India Article in Indian Journal of Fisheries · July 2015 CITATION READS 1 525 6 authors, including: Ravi Kumar Gautam A. K. Jaiswar Indian Council of Agricultural Research ICAR- Central Institute of Fisheries Education 15 PUBLICATIONS 22 CITATIONS 244 PUBLICATIONS 781 CITATIONS SEE PROFILE SEE PROFILE Annam Pavan Kumar S. K. Chakraborty Central Institute of Fisheries Education Central Institute of Fisheries Education 98 PUBLICATIONS 374 CITATIONS 254 PUBLICATIONS 1,455 CITATIONS SEE PROFILE SEE PROFILE Some of the authors of this publication are also working on these related projects: UPCST Project View project Fisheries Resource Management View project All content following this page was uploaded by Annam Pavan Kumar on 02 July 2015. The user has requested enhancement of the downloaded file. Indian J. Fish., 62(2): 92-97, 2015 92 Note DNA barcoding of Thais species (Family: Muricidae) from west coast of India RAVI KUMAR, A. K. JAISWAR, A. PAVAN-KUMAR. A, S. K. CHAKRABORTY S. JAHAGEERDAR AND W. S. LAKRA Central Institute of Fisheries Education (Deemed University), Versova, Andheri West, Mumbai - 400 061 Maharashtra, India e-mail: [email protected] ABSTRACT Accurate species identification is essential for defining biological entities for sustainable management and conservation. Species identification under the genus Thais (Mollusca: Neogastropoda: Muricidae) based on shell morphology often mystify due to the phenotype plasticity. In this study, efficiency of DNA barcodes (mitochondrial cytochrome c oxidase subunit I gene – COI gene) was tested to discriminate six species of Thais from west coast of India.
    [Show full text]
  • Jurnal Hubungan Ukuran Partikel Dan Bahan Organik
    0 JURNAL HUBUNGAN UKURAN PARTIKEL DAN BAHAN ORGANIK SEDIMEN DENGAN KELIMPAHAN MAKROZOOBENTHOS DI PERAIRAN MEDANG KAMPAI KOTA DUMAI OLEH NOVHITASARI SIMBOLON 1504120388 FAKULTAS PERIKANAN DAN KELAUTAN UNIVERSITAS RIAU PEKANBARU 2019 1 THE CORRELATION OF SIZE AND SEDIMENT ORGANIC MATTER WITH MAKROZOOBENTHOS ABUNDANCE IN MEDANG KAMPAI DUMAI CITY By Novhitasari Simbolon1), Afrizal Tanjung2), Elizal2) Departement of Marine Science, Faculty Of Fisheries and Marine Science Universitas Riau, Pekanbaru, Indonesia [email protected] ABSTRACT This research was conducted in March 2019 at Medang Kampai Waters of Dumai City. This study aims to determine the relationship between particle size and sediment organic matter with abundance of macrozoobenthos in Medang Kampai waters. The method used is survey. Determination of stations using purposive sampling method. Sampling was carried out in the field and then taken to the Marine Chemistry Laboratory for analysis of sediment and organic material fractions. The identification of macrozoobenthos was carried out at the Marine Biology Laboratory. The results of the study of sediment fractions showed different types of sediments, namely sandy mud, gravel sand, and mud. Particle size and density of silt sediments (4.90 - 7.30 Ø). The content of organic ingredients is 3.37% - 19.40%. And the abundance of macrozoobenthos ranges from 1.11 ind / m2 - 3.56 ind / m2 with 16 numbers of species found from the dominating class of gastropods. The relationship of sediment particle size (Mz) to the abundance of macrozoobenthos has a value (r) = 0.0721 a very weak relationship (H0.1 is accepted). The relationship between the total organic matter content of sediments and the abundance of macrozoobenthos has a value (r) = 0.1044 which means it has a very weak relationship (H1.1 is accepted).
    [Show full text]