DOCSLIB.ORG

Chondrichthyes: Myliobatiformes: Dasyatididae) from the Northwest Coast of Costa Rica

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Chondrichthyes: Myliobatiformes: Dasyatididae) from the Northwest Coast of Costa Rica View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by DigitalCommons@University of Nebraska University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Faculty Publications from the Harold W. Manter Laboratory of Parasitology Parasitology, Harold W. Manter Laboratory of 4-1996 Two New Species of Tetraphyllidean Cestodes in Himantura pacifica (Chondrichthyes: Myliobatiformes: Dasyatididae) from the Northwest Coast of Costa Rica Fernando Marques University of Toronto Daniel R. Brooks University of Toronto, [email protected] Helena Molina Ureña Universidad de Costa Rica Follow this and additional works at: https://digitalcommons.unl.edu/parasitologyfacpubs Part of the Parasitology Commons Marques, Fernando; Brooks, Daniel R.; and Molina Ureña, Helena, "Two New Species of Tetraphyllidean Cestodes in Himantura pacifica (Chondrichthyes: Myliobatiformes: Dasyatididae) from the Northwest Coast of Costa Rica" (1996). Faculty Publications from the Harold W. Manter Laboratory of Parasitology. 273. https://digitalcommons.unl.edu/parasitologyfacpubs/273 This Article is brought to you for free and open access by the Parasitology, Harold W. Manter Laboratory of at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Faculty Publications from the Harold W. Manter Laboratory of Parasitology by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. J. Parasitol., 82(2), 1996, p. 302-306 ? American Society of Parasitologists 1996 TWO NEW SPECIES OF TETRAPHYLLIDEANCESTODES IN HIMANTURAPACIFICA (CHONDRICHTHYES: MYLIOBATIFORMES: DASYATIDIDAE)FROM THE NORTHWESTCOAST OF COSTA RICA Fernando Marques, Daniel R. Brooks, and Helena Molina Urefia* Department of Zoology, Universityof Toronto, Toronto, Ontario,Canada M5S 1A1 ABSTRACT: Two new species of tetraphyllideancestodes inhabitingHimantura pacifica from the northwestcoast of Costa Rica are apparentlymost closely relatedto species inhabitingHimantura schmardae from the Atlantic coast of Colombia.Acantho- bothroidespacificus n. sp. differsfrom Acanthobothroides thorsoni, the only otherspecies in the genus,primarily by havingsmaller lateral(98-123 ,umrather than 168-198 ,tm long) and medial (handles 92-116 Amrather than 162-168 ,umlong) hooks, and more testes (up to 125 ratherthan up to 97) per proglottis.The genericdiagnosis of Acanthobothroidesis modified to include the presenceof a small inner prong on the large medial bothridialhooks. Rhinebothriumgeminum n. sp. and Rhinebothrium magniphallumare the only 2 species in the genus possessingunusually long cirrussacs, extendingfrom the genitalatrium all the way to the ovarianisthmus; R. geminumaverages 12 (12-14) loculi perbothridium and 11 (9-12) testes,whereas R. magniphallum averages17 (16-18) loculi and 14 (10-16) testes per proglottis. The presence of sister species on each side of the Panama DESCRIPTION isthmus has been for sea reported octopods, urchins, pinnother- Acanthobothroides pacificus n. sp. id crabs of the genus Dissodactylus, and atherinid fishes (Voight, (Fig.1A-D) others. 1988; Lessios, 1979; Griffith, 1987; White, 1986) among Description(based on 2 completeand 2 incompletespecimens): Stro- However, studies referring to pairs of species on both side of bila craspedote,anapolytic, up to 65.3-122 mm long; composed of up the isthmus are scarce for helminths, restricted to Manter's (1940) to 409 proglottides.Scolex 719-954 (n = 2) long by 935-1,078 (n = 2) list of species pairs of digenetic trematodes inhabiting marine wide. Bothridia 630-814 (716 ? 67; n = 7) long by 324-445 (383 ? n = 394-464 ? n = fishes. Brooks (1977) described 6 new species of tetraphyllidean 38; 7) wide;anterior loculus (422 30; 7) long, middle loculus 140-197 (169 ? 19; n = 7), posteriorloculus 89-159 (124 ? cestodes inhabiting a species of marine stingray, Himantura 22; n = 7). Ratio of loculi lengths 1:0.4:0.3. Bothridialapical suckers schmardae (Werner), from the Caribbean coast of Colombia. 63-79 (70 ? 7; n = 6) in diameter,pads 173-198 (182 ? 12; n = 5). The present paper describes 2 new species of tetraphyllideans Medial bothridialhooks 100-131 (120 + 10; n = 6) long; handle 92- = inhabiting the putative sister species of H. schmardae, Himan- 116 (106 ? 9; n = 7) long, inner prong 41-54 (47 ? 4, n 7), outer prong66-82 (77 + 7, n = 7). Lateralbothridial hooks 98-123 (109 ? tura (Beebe and Tee-Van), from the Pacific coast of pacifica 11; n = 7) long; handle 64-79 (71 ? 4; n = 7), inner prong 43-57 (51 Costa Rica. + 5; n = 7), outerprong 59-71 (64 ? 4; n = 7). Cephalicpeduncle 5.8- 26.8 (16.0 ? 9.0; n = 4) mm long. Immatureproglottides wider than long. Mature proglottides394-604 (488 ? 61; n = 14) long by 1.28- MATERIALSAND METHODS 1.70 (1.53 + 0.15; n = 14) mm wide. Testes 80-125 (104 ? 13; n = 14) in number,43-101 (77 ? 11; n = 100) in diameter, 11-20 (15 ? In June 1992, 1 specimen of Himanturapacifica (Beebe and Tee- 3; n = 14) postporally,23-39 (33 ? 6; n = 14) preporally,46-69 (57 Van) was capturedat PlayaPanama, Guanacaste Province, Costa Rica, + 6; n = 14) antiporally.Cirrus sac near mid-proglottis,337-445 (401 using a beach seine. Wormswere removed from the spiralvalve, killed + 24; n = 41) long by 146-223 (188 + 20; n = 41) wide, contained with hot tap water,transferred immediately to AFA for 24-48 hr, and spined eversiblecirrus. Vagina anterior to cirrussac; vaginal sphincter then stored in 70%ethanol. Specimenswere stained with Mayer'she- a muscular-glandularthickening near genital pore. Proglottidesnot con- matoxylin and mounted in Canadabalsam for examinationas whole taining testes, but with sperm in the vas deferens 0.46-1.37 (0.85 ? mounts. Measurementsare in jzm unless otherwise stated; for some 0.26; n = 17) mm long by 0.67-1.62 (1.15 ? 0.27; n = 17) mm wide. ? 1 traits, rangesare given, followed in parenthesesby mean values Genitalpore 43-53% (46 + 3; n = 19) of proglottislength from anterior standarddeviation and the samplesize (n). Hook measurementsfollow end. Ovary follicular305-420 (373 ? 48; n = 7) long by 922-1,049 the formulaof Euzet (1956) modified as follows: For each parameter, (998 ? 46; n = 7) wide at isthmus. Isthmus 69-176 (115 ? 2; n = 12) mean value ? 1 standarddeviation is given, followed in parentheses long by 66-108 (99 ? 20; n = 12) wide. Vitelline follicles extending by its range.Figures were drawnwith the aid of cameralucida using a entirelength of proglottis,from level of ovarianisthmus to nearanterior BH-2 Olympus microscope.The tetralobednature of the ovaries was end. Uterus not observed. confirmedfrom lateralviews of unmountedspecimens and from whole mounts because sufficientmaterial for sectioning was not available. Taxonomic summary MNHG refersto the Museumof NaturalHistory, Geneva, Switzerland; USNPC refersto the U.S. NationalParasite Collection, Beltsville, Mary- Host: Himanturapacifica (Beebe and Tee-Van). land; UNSMHWML refers to the University of NebraskaState Mu- Site of infection: Spiralvalve. seum, HaroldW. ManterLaboratory, Division of Parasitology,Lincoln, Locality: PlayaPanama, Guanacaste, Costa Rica (10?15'N; 86?00'W). Nebraska,U.S.A. Holotype: MNHG no. INV 20585. Paratypes: MNHG no. INV 20586; UNSMHWMLno. 38742. Etymology: The species is named for the ocean from which it was first described. Remarks Received 10 July 1995;revised 30 October1995; accepted 30 October Acanthobothroideswas proposed by Brooks (1977) for A. thorsoni 1995. Brooks, 1977 collected in the spiral valve of H. schmardaefrom the * Escuelade Biologia,Universidad de CostaRica, SanJose, CostaRica. Atlantic coast of Colombia.Acanthobothroides thorsoni possessed sco- 302 MARQUESET AL.-TWO NEW CESTODESFROM COSTA RICANSTINGRAYS 303 A C A 500 im B 100 gim C 500 im D F D 150 gim E 500 (Jm F 500 gim E FIGURE 1. Acanthobothroides pacificus n. sp. and A. thorsoni. A. Scolex of A. pacificus n. sp. B. Medial and lateral hooks of A. pacificus n. sp. C. Medial hook of A. thorsoni (UNSMHWML no. 20259, paratype). D. Immature proglottis (dorsal lobe of ovary omitted) in A. pacificus n. sp. E. Mature proglottis with testes in A. pacificus n. sp. F. terminal proglottis without testes but with sperm in vas deferens in A. pacificus n. sp. 304 THE JOURNALOF PARASITOLOGY,VOL. 82, NO. 2, APRIL1996 <0'00 --0 /^c^ae_. t ,/.............:..* .-c'"ig^^ M t ! L : : ; ( : - : 9 y- z ; : - ' X . u i ' - ' E; ,? MARQUESET AL.-TWO NEW CESTODES FROM COSTA RICAN STINGRAYS 305 leces comprising4 triloculatebothridia each surmountedby an apical 63-113 (73 + 17;n = 9) wide, containedspined eversible cirrus. Vagina pad and suckerand armed with a pair of hooks. The lateralhook was anterior to cirrus sac; vaginal sphincter a glandularthickening near similar in shape to those exhibitedby species of AcanthobothriumVan genital pore. Genital pore 29-46% (37 + 4; n = 12) of proglottislength Beneden, 1849 and the medial hook describedas havinga singlerobust from anterior end. Ovary V-shaped near posterior end of proglottis, prong, thus distinct from other species of Acanthobothrium.Acantho- lobes fused posteriorly,X-shaped in cross section, 195-378 (263 + 54; bothroidespacificus is highly similar to A. thorsoni.Our specimensare n = 12) long by 60-94 (74 ? 11; n = 9) wide at isthmus. Ovarianlobes smaller (up to 122 mm long) than those of A. thorsoni(up to 400 mm symmetrical,extending anteriorly to 1 ovarianlength posterior to level long) and have fewer segments (approximately400 ratherthan 700). of genital pore, terminatingjust anteriorto posteriormargin of cirrus
Load more

Recommended publications
  • An Introduction to the Classification of Elasmobranchs
    An introduction to the classification of elasmobranchs 17 Rekha J. Nair and P.U Zacharia Central Marine Fisheries Research Institute, Kochi-682 018 Introduction eyed, stomachless, deep-sea creatures that possess an upper jaw which is fused to its cranium (unlike in sharks). The term Elasmobranchs or chondrichthyans refers to the The great majority of the commercially important species of group of marine organisms with a skeleton made of cartilage. chondrichthyans are elasmobranchs. The latter are named They include sharks, skates, rays and chimaeras. These for their plated gills which communicate to the exterior by organisms are characterised by and differ from their sister 5–7 openings. In total, there are about 869+ extant species group of bony fishes in the characteristics like cartilaginous of elasmobranchs, with about 400+ of those being sharks skeleton, absence of swim bladders and presence of five and the rest skates and rays. Taxonomy is also perhaps to seven pairs of naked gill slits that are not covered by an infamously known for its constant, yet essential, revisions operculum. The chondrichthyans which are placed in Class of the relationships and identity of different organisms. Elasmobranchii are grouped into two main subdivisions Classification of elasmobranchs certainly does not evade this Holocephalii (Chimaeras or ratfishes and elephant fishes) process, and species are sometimes lumped in with other with three families and approximately 37 species inhabiting species, or renamed, or assigned to different families and deep cool waters; and the Elasmobranchii, which is a large, other taxonomic groupings. It is certain, however, that such diverse group (sharks, skates and rays) with representatives revisions will clarify our view of the taxonomy and phylogeny in all types of environments, from fresh waters to the bottom (evolutionary relationships) of elasmobranchs, leading to a of marine trenches and from polar regions to warm tropical better understanding of how these creatures evolved.
    [Show full text]
  • A Systematic Revision of the South American Freshwater Stingrays (Chondrichthyes: Potamotrygonidae) (Batoidei, Myliobatiformes, Phylogeny, Biogeography)
    W&M ScholarWorks Dissertations, Theses, and Masters Projects Theses, Dissertations, & Master Projects 1985 A systematic revision of the South American freshwater stingrays (chondrichthyes: potamotrygonidae) (batoidei, myliobatiformes, phylogeny, biogeography) Ricardo de Souza Rosa College of William and Mary - Virginia Institute of Marine Science Follow this and additional works at: https://scholarworks.wm.edu/etd Part of the Fresh Water Studies Commons, Oceanography Commons, and the Zoology Commons Recommended Citation Rosa, Ricardo de Souza, "A systematic revision of the South American freshwater stingrays (chondrichthyes: potamotrygonidae) (batoidei, myliobatiformes, phylogeny, biogeography)" (1985). Dissertations, Theses, and Masters Projects. Paper 1539616831. https://dx.doi.org/doi:10.25773/v5-6ts0-6v68 This Dissertation is brought to you for free and open access by the Theses, Dissertations, & Master Projects at W&M ScholarWorks. It has been accepted for inclusion in Dissertations, Theses, and Masters Projects by an authorized administrator of W&M ScholarWorks. For more information, please contact [email protected]. INFORMATION TO USERS This reproduction was made from a copy of a document sent to us for microfilming. While the most advanced technology has been used to photograph and reproduce this document, the quality of the reproduction is heavily dependent upon the quality of the material submitted. The following explanation of techniques is provided to help clarify markings or notations which may appear on this reproduction. 1.The sign or “target” for pages apparently lacking from the document photographed is “Missing Pagefs)”. If it was possible to obtain the missing page(s) or section, they are spliced into the film along with adjacent pages. This may have necessitated cutting through an image and duplicating adjacent pages to assure complete continuity.
    [Show full text]
  • Paleogene Origin of Planktivory in the Batoidea
    Paleogene Origin Of Planktivory In The Batoidea CHARLIE J. UNDERWOOD, 1+ MATTHEW A. KOLMANN, 2 and DAVID J. WARD 3 1Department of Earth and Planetary Sciences, Birkbeck, University of London, UK, [email protected]; 2 Department of Ecology and Evolutionary Biology, University of Toronto, Canada, [email protected]; 3Department of Earth Sciences, Natural History Museum, London, UK, [email protected] +Corresponding author RH: UNDERWOOD ET AL.—ORIGIN OF PLANKTIVOROUS BATOIDS 1 ABSTRACT—The planktivorous mobulid rays are a sister group to, and descended from, rhinopterid and myliobatid rays which possess a dentition showing adaptations consistent with a specialized durophageous diet. Within the Paleocene and Eocene there are several taxa which display dentitions apparently transitional between these extreme trophic modality, in particular the genus Burnhamia. The holotype of Burnhamia daviesi was studied through X-ray computed tomography (CT) scanning. Digital renderings of this incomplete but articulated jaw and dentition revealed previously unrecognized characters regarding the jaw cartilages and teeth. In addition, the genus Sulcidens gen. nov. is erected for articulated dentitions from the Paleocene previously assigned to Myliobatis. Phylogenetic analyses confirm Burnhamia as a sister taxon to the mobulids, and the Mobulidae as a sister group to Rhinoptera. Shared dental characters between Burnhamia and Sulcidens likely represent independent origins of planktivory within the rhinopterid – myliobatid clade. The transition from highly-specialized durophagous feeding morphologies to the morphology of planktivores is perplexing, but was facilitated by a pelagic swimming mode in these rays and we propose through subsequent transition from either meiofauna-feeding or pelagic fish-feeding to pelagic planktivory.
    [Show full text]
  • Unravelling the Foraging Behavior of the Southern Stingray, Hypanus Americanus (Myliobatiformes: Dasyatidae) in a Southwestern Atlantic MPA
    Neotropical Ichthyology, 17(2): e180131, 2019 Journal homepage: www.scielo.br/ni DOI: 10.1590/1982-0224-20180131 Published online: 15 July 2019 (ISSN 1982-0224) Copyright © 2019 Sociedade Brasileira de Ictiologia Printed: 30 June 2019 (ISSN 1679-6225) Original article Unravelling the foraging behavior of the southern stingray, Hypanus americanus (Myliobatiformes: Dasyatidae) in a Southwestern Atlantic MPA Renato H. A. Freitas1, Aline A. Aguiar2, Ana Karina C. H. A. Freitas1, Sergio M. Q. Lima3 and Jean L. Valentin2 Previous study suggested that the southern stingray (Hypanus americanus) displays a marked ontogenetic shift in its habitat use in the Fernando de Noronha Archipelago (FNA), an attractive touristic spot in Brazil, that could be associated with changes in its feeding habits and foraging strategies. Here, we conducted underwater visual surveys (~100 h a 3 years’ study) at this site to describe the foraging behavior of the same species in details and to assess diel patterns in activity. We observed that H. americanus is capable of several complex and highly plastic behaviors (we described more than 21 of them) while foraging. The foraging events’ timing appears to be related to the size (as well as sex) of the stingrays, environment and depth. In addition, our results support a segregation of habitat mediated by the size and sex of the stingrays, but it is able to modulate its foraging repertoire based mainly on environmental stimulus. Finally, we found that H. americanus forage intermittently throughout the day and tidal cycle, yet are less active during non-crepuscular periods and at flood and ebb tides.
    [Show full text]
  • Rays and Skates (Batoidea) Conservation Profile Synopsis
    Rays and Skates (Batoidea) Conservation Profile Synopsis Status of Ray and Skate Populations IUCN Red List Total Species CR EN VU NT LC DD State of the Batoidea Superorder 539 14 28 65 62 114 256 Rays and skates belong to the Batoidea Superorder and consist of stingrays CR, Critically Endangered; EN, Endangered; VU, and related species (Order Myliobatiforme, 223 species), electric rays (Order Vulnerable; NT, Near Threatened; LC, Least Torpediniforme, 69 species), skates and related species (Order Rajiforme, Concern; DD, Data Deficient. 270 species), and sawfish (Order Pristiforme, 5-7 species). Most batoid species live on the sea floor and are found in a variety of ecosystems across CITES the planet: coastal, deep water (3,000 m), tropical, subtropical, temperate, Appendix 1:7 species cold-water, estuarine, marine, freshwater, and open seas. As opportunistic foragers in complex trophic webs, batoids can impact and alter ecosystems if Appendix II: 1 species 1,2 other top-predators are removed . AZA Subpopulation Several batoids are listed as endangered in US-waters for which smalltooth Marine Fishes Taxon Advisory Group sawfish have a designated critical habitat and recovery plan as of 2009. There Chair Beth Firchau is a high degree of uncertainty with respect to the status of ray and skate populations at the global level even though they are some of the world’s most vulnerable marine fishes3. Many populations are extinct, and many more are critically endangered particularly in coastal ecosystems. Primary Threats to the Species Batoids face extinction risks due to a variety of threats that include capture in nets from targeted and accidental catch.
    [Show full text]
  • A Review of Longnose Skates Zearaja Chilensisand Dipturus Trachyderma (Rajiformes: Rajidae)
    Univ. Sci. 2015, Vol. 20 (3): 321-359 doi: 10.11144/Javeriana.SC20-3.arol Freely available on line REVIEW ARTICLE A review of longnose skates Zearaja chilensis and Dipturus trachyderma (Rajiformes: Rajidae) Carolina Vargas-Caro1 , Carlos Bustamante1, Julio Lamilla2 , Michael B. Bennett1 Abstract Longnose skates may have a high intrinsic vulnerability among fishes due to their large body size, slow growth rates and relatively low fecundity, and their exploitation as fisheries target-species places their populations under considerable pressure. These skates are found circumglobally in subtropical and temperate coastal waters. Although longnose skates have been recorded for over 150 years in South America, the ability to assess the status of these species is still compromised by critical knowledge gaps. Based on a review of 185 publications, a comparative synthesis of the biology and ecology was conducted on two commercially important elasmobranchs in South American waters, the yellownose skate Zearaja chilensis and the roughskin skate Dipturus trachyderma; in order to examine and compare their taxonomy, distribution, fisheries, feeding habitats, reproduction, growth and longevity. There has been a marked increase in the number of published studies for both species since 2000, and especially after 2005, although some research topics remain poorly understood. Considering the external morphological similarities of longnose skates, especially when juvenile, and the potential niche overlap in both, depth and latitude it is recommended that reproductive seasonality, connectivity and population structure be assessed to ensure their long-term sustainability. Keywords: conservation biology; fishery; roughskin skate; South America; yellownose skate Introduction Edited by Juan Carlos Salcedo-Reyes & Andrés Felipe Navia Global threats to sharks, skates and rays have been 1.
    [Show full text]
  • Field Identification of Common Rays
    Field Identification of Rays and Some Common Flatfishes of India Rekha J. Nair 6 Demersal Fisheries Division ORDER Myliobatiformes This suborder includes all of the Eagle Rays (Myliobatidae), Cownose Rays (Rhinopteridae) and the Mobulid Rays and includes about 40 species which are characterized by diamond shaped bodies and wing-like pectoral fins which they use to propel themselves through open water. Eagle Rays and Cownose Rays feed on the seabed, using their mouths to dig amongst the substrate in search of buried molluscs and crustaceans, while the mobulid rays lead a complete pelagic life. The order has 8 families under it. Family Dasyatidae – Whip tail sting rays Dorsal fin totally absent or indistinct if when present. Tail long and whip-like. Most species with at least 1 long venomous spine on tail, which can cause excruciating pain to humans. Dasyatis kuhlii Dasyatis zugei Training Manual on Species Identification Himantura gerrardi Hypolophus sephen Cow tail sting ray A high lower caudal finfold present which is 2 to 3 times depth of tail but not reaching tail tip; no large thorns; 1 or 2 long stings on tail, further behind tail base. Urogymnus asperrimus – Porcupine ray - Protected under Wild Life Act, 1972 Himantura uarnak – Honey comb sting ray Tail with alternating black and white bands, tip mostly pale; skin folds pale at base with dark outer margin, disc with blue dots. Taeniura lymma (Forsskål, 1775) Identification of Common Rays and Flatfishes 89 Training Manual on Species Identification Taeniura meyeni Müller & Henle, 1841 Round ribbon tail ray Black blotches on a grey background Family Gymnuridae – Butterfly rays Disc broad, 1.5 times broader than long Dorsal fin and tail spines present Tail very slender and short (shorter than disc).
    [Show full text]
  • Reproductive Biology of Three Ray Species: Gymnura Micrura (Bloch
    Cah. Biol. Mar. (2007) 48 : 249-257 Reproductive biology of three ray species: Gymnura micrura (Bloch & Schneider, 1801), Dasyatis guttata (Bloch & Schneider, 1801) and Dasyatis marianae Gomes, Rosa & Gadig, 2000, caught by artisanal fisheries in Northeastern Brazil Leandro YOKOTA1* and Rosângela Paula LESSA2 (1,2) Postgraduate Program in Animal Biology – Department of Zoology – Federal University of Pernambuco (UFPE) Av. Prof. Moraes Rego, 1235, Cidade Universitária, Recife – PE, Brazil. CEP 50670-420 *Corresponding author: Rua D. Pedro II, 1916, Nova Americana, Americana – SP, Brazil CEP 13466-000. E-mail: [email protected]) (2) Laboratory of Marine Population Dynamics (DIMAR) – Department of Fisheries – Federal Rural University of Pernambuco (UFRPE) Av. D. Manoel de Medeiros, s/n, Dois Irmãos, Recife – PE, Brazil. CEP 52171-900. E-mail: [email protected] Abstract: Two hundred forty-eight specimens of Gymnura micrura, 154 Dasyatis guttata and 24 Dasyatis marianae were sampled. G. micrura and D. guttata juveniles represented 78 and 88% of the sample, respectively, whereas all D. marianae individuals were adults. The maturity size of G. micrura males and females was estimated from 27 to 30 cm disk width (DW) and 34 to 36 cm DW, respectively. The maturity size of D. guttata males and females was estimated from 41 to 46 cm DW and 50 to 55 cm DW, respectively. Birth size of G. micrura was estimated between 15 and 17.4 cm DW, the one of D. guttata between12.3 and 15.3 cm DW and the one of D. marianae between 13 and 14 cm DW. Female rays appeared to mature at larger sizes than males and reached a larger maximum size.
    [Show full text]
  • Bio-Ecological Features Update on Eleven Rare Cartilaginous Fish in the Central-Western Mediterranean Sea As a Contribution for Their Conservation
    life Article Bio-Ecological Features Update on Eleven Rare Cartilaginous Fish in the Central-Western Mediterranean Sea as a Contribution for Their Conservation Antonello Mulas 1,2,*,†, Andrea Bellodi 1,2,† , Pierluigi Carbonara 3 , Alessandro Cau 1,2 , Martina Francesca Marongiu 1,2 , Paola Pesci 1,2, Cristina Porcu 1,2 and Maria Cristina Follesa 1,2 1 Department of Life and Environmental Sciences, University of Cagliari, 09126 Cagliari, Italy; [email protected] (A.B.); [email protected] (A.C.); [email protected] (M.F.M.); [email protected] (P.P.); [email protected] (C.P.); [email protected] (M.C.F.) 2 CoNISMa Consorzio Nazionale Interuniversitario per le Scienze del Mare, 00196 Roma, Italy 3 COISPA Tecnologia & Ricerca, 70126 Bari, Italy; [email protected] * Correspondence: [email protected] † Authors contributed equally to this work and should be considered co-first authors. Abstract: Cartilaginous fish are commonly recognized as key species in marine ecosystems for their fundamental ecological role as top predators. Nevertheless, effective management plans for cartilagi- nous fish are still missing, due to the lack of knowledge on their abundance, distribution or even life-history. In this regard, this paper aims at providing new information on the life-history traits, such as age, maturity, reproductive period, in addition to diet characteristics of eleven rare cartilagi- Citation: Mulas, A.; Bellodi, A.; nous fish inhabiting the Central-Western Mediterranean Sea belonging to the orders Chimaeriformes Carbonara, P.; Cau, A.; (Chimaera monstrosa), Hexanchiformes (Heptranchias perlo and Hexanchus griseus), Myliobatiformes Marongiu, M.F.; Pesci, P.; Porcu, C.; Follesa, M.C. Bio-Ecological Features (Aetomylaeus bovinus and Myliobatis aquila), Rajiformes (Dipturus nidarosiensis and Leucoraja circu- Update on Eleven Rare Cartilaginous laris), Squaliformes (Centrophorus uyato, Dalatias licha and Oxynotus centrina) and Torpediniformes Fish in the Central-Western (Tetronarce nobiliana), useful for their assessment and for future management actions.
    [Show full text]
  • Myliobatiformes: Gymnuridae), with the Description of Two New Species
    W&M ScholarWorks Dissertations, Theses, and Masters Projects Theses, Dissertations, & Master Projects 2017 Age, Growth and Reproduction of Western North Atlantic Butterfly Rays (Myliobatiformes: Gymnuridae), with the Description of Two New Species Kristene Teal Parsons College of William and Mary - Virginia Institute of Marine Science, [email protected] Follow this and additional works at: https://scholarworks.wm.edu/etd Part of the Aquaculture and Fisheries Commons, Biology Commons, Marine Biology Commons, and the Zoology Commons Recommended Citation Parsons, Kristene Teal, "Age, Growth and Reproduction of Western North Atlantic Butterfly Rays (Myliobatiformes: Gymnuridae), with the Description of Two New Species" (2017). Dissertations, Theses, and Masters Projects. Paper 1516639565. http://dx.doi.org/doi:10.21220/V58T7S This Dissertation is brought to you for free and open access by the Theses, Dissertations, & Master Projects at W&M ScholarWorks. It has been accepted for inclusion in Dissertations, Theses, and Masters Projects by an authorized administrator of W&M ScholarWorks. For more information, please contact [email protected]. Age, Growth and Reproduction of Western North Atlantic Butterfly Rays (Myliobatiformes: Gymnuridae), with the Description of Two New Species A Dissertation Presented to The Faculty of the School of Marine Science The College of William and Mary in Virginia In Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy by Kristene Teal Parsons August 2017 APPROVAL PAGE This dissertation is submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy Kristene Teal Parsons Approved by the Committee, May 2017 Robert J. Latour, Ph.D. Committee Chair / Advisor Eric J.
    [Show full text]
  • Field Identification Guide to the Living Marine Resources in Kenya
    Batoid Fishes 68 BATOID FISHES The ‘‘Guide to Orders and Families’’, includes a total of 4 Orders and 7 Families. The latter are arranged by order using the classification adopted by Eschmeyer & Fricke (2011) which best reflects current use. Page numbers refer to those families that are treated in more detail in the species identification guide. The ‘‘Guide to Species’’, includes 19 species belonging to 7 families. TECHNICAL TERMS AND MEASUREMENTS pectoral fin alar spines (in males) thorns of median row 1st spiracle dorsal fin orbit nd pelvic fin, anterior lobe 2 dorsal fin alar thorns pelvic fin, posterior lobe caudal fin clasper of males lateral tail fold inner margin of length pelvic fin of snout, preorbital dorsal view axil of pectoral fin length of disc length of snout, mouth preoral anus width of disc nasal apertures length of tail ventral view gill slits Guide to Orders and Families GUIDE TO ORDERS AND FAMILIES 69 Order PRISTIFORMES – Sawfishes § Body shark–like with a saw–like elongated snout bearing a row of strong lateral teeth on each side. PRISTIDAE Page 72 Sawfishes § To 7.3 m. Demersal in shallow marine waters and estuaries, enters freshwaters. Two species are included in the Guide to Species. snout extremely prolonged, blade–like, armed with tooth–like structures Order TORPEDINIFORMES – Electric rays § § Pectoral fins greatly expanded and fused with head and trunk, forming a large oval disc; tail stout, without a spine. A large electric organ on each side of head, usually visible through the skin as a pattern of hexagonal markings. TORPEDINIDAE Page 72 Electric rays §§ To 1.3 m.
    [Show full text]
  • North Atlantic Batoids and Chimaeras Relevant to Fisheries Management a Pocket Guide Fao
    NORTH ATLANTIC BATOIDS AND CHIMAERAS RELEVANT TO FISHERIES MANAGEMENT A POCKET GUIDE FAO. North Atlantic Batoids and Chimaeras Relevant to Fisheries Management. A Pocket Guide. Rome, FAO. 2012. 84 cards. For feedback and questions contact: FishFinder Programme, Marine and Inland Fisheries Service (FIRF), Food and Agriculture Organization of the United Nations, Viale delle Terme di Caracalla, 00153 Rome, Italy. [email protected] Programme Manager: Johanne Fischer, FAO Rome, Italy Author: Matthias Stehmann, ICHTHYS, Hamburg, Germany Colour illustrations and cover: Emanuela D’Antoni, FAO Rome, Italy Scientific and technical revisers: Nicoletta De Angelis, Edoardo Mostarda, FAO Rome, Italy Digitization of distribution maps: Fabio Carocci, FAO Rome, Italy Page composition: Edoardo Mostarda, FAO Rome, Italy Produced with support of the EU. Reprint: August 2013 Thedesignations employed and the presentation of material in this information product do not imply the expression of any opinion whatsoever on the part of the Food and Agriculture Organization of the United Nations (FAO) concerning the legal or development status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. The mention of specific companies or products of manufacturers, whether or not these have been patented, does not imply that these have been endorsed or recommended by FAO in preference to others of a similar nature that are not mentioned. The views expressed in this information product are those of the author(s) and do not necessarily reflect the views or policies of FAO. ISBN 978-92-5-107365-0 (Print) E-ISBN 978-92-5-107883-9 (PDF) FAO 2012 FAO encourages the use, reproduction and dissemination of material in this information product.
    [Show full text]