DOCSLIB.ORG

(Adult Lateolabrax Latus) on a Temperate-Subtropical Rocky Shore

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
(Adult Lateolabrax Latus) on a Temperate-Subtropical Rocky Shore Foraging ecology of a large opportunistic predator (adult Lateolabrax latus) on a temperate-subtropical rocky shore Seiji Arakaki, Neil Hutchinson, Mutsunori Tokeshi Coastal Ecosystems, 2014, vol 1, 14-27 © 2014 Society for Coastal Ecosystems Studies - Asia Pacific Arakaki S et al. Foraging by a large opportunistic predator Regular Paper Foraging ecology of a large opportunistic predator (adult Lateolabrax latus) on a temperate-subtropical rocky shore Seiji Arakaki1, Neil Hutchinson1,2 and Mutsunori Tokeshi1 1AMBL, Kyushu University, Amakusa 863-2507, Japan 2JCU Singapore, TropWATER - Centre for Tropical Water & Aquatic Ecosystem Research, Centre for Tropical Water & Aquatic Ecosystem Research James Cook University, Singapore 57442 Corresponding author : S. Arakaki, e-mail: [email protected] Abstract Foraging ecology of a large opportunistic predator (adult Lateolabrax latus) was investigated through intensive, targeted sampling of the species on an exposed shallow rocky shore of south-western Japan. The abundance of L. latus increased in autumn and spring, whilst no individual occurred in summer when water temperatures were >24˚C. In spring larger sized individuals (>70 cm TL) tended to occur, resulting in a wide range of body sizes. L. latus consumed a wide variety of organisms, of which fishes and benthic crustaceans were particularly important. Overall, the relative importance of invertebrates as food increased in spring, which may be related to seasonal fluctuations of macro-algae and algae-associated faunas. The fact that a large number of adult fish was collected at high tide in intertidal areas and their guts contained intertidal organisms suggests that L. latus relies on the rocky intertidal habitat as a major foraging ground. This in turn points to the potential importance of large, highly mobile predators such as adult L. latus in the food web dynamics of shal- low-water (including the intertidal) assemblages. Keywords: diet, intertidal, piscivore, sea bass, seasonal occurrence, stomach contents assemblages of organisms. Whilst migration of fishes Introduction into intertidal habitats has been reported under various environmental settings (e.g., Burrows et al. 1994; Rangeley Shallow coastal areas are generally characterised by & Kramer 1995; Sheaves 2001; Faria & Almada 2006; high productivity and provide a large amount of resources Castellanos-Galindo, Krumme & Willis 2010), most studies to diverse marine organisms. In addition, shallow water dealt with juveniles or relatively small fishes and information habitats including intertidal zones constitute important on large-sized foragers is scarce. Intermittent use of nursery grounds for larval stages of marine taxa, generally intertidal areas as foraging sites is a potentially important being considered as ‘refugia’ with lowered risks of predation ecological topic that could link subtidal and intertidal (e.g. Blaber & Blaber 1980; Kneib 1987; McIvor & Odum ecosystems. Although some previous studies suggested 1988, Ruiz, Hines & Posey 1993). Therefore, shallow a possibility that migratory foraging may have a significant coastal areas play important ecological functions for different impact on intertidal communities (e.g. Edwards, Conover & © 2014 SCESAP - 14 - Coastal Ecosystems, 2014, Vol 1, 14-27 Arakaki S et al. Foraging by a large opportunistic predator Sutter 1982; Lubchenco et al. 1984; Castellanos-Galindo, Wong 2003; Islam & Tanaka 2006; Islam, Yamashita & Krumme & Willis 2010), our understanding of such situations Tanaka 2011), studies on L. latus have largely been limited is limited. Thus, the present study focused on the temperate to investigations of their early life stages in surf zones or sea bass, Lateolabrax latus, as one of the potentially estuaries and other soft-bottom environments (Fujita et al. important large predators in shallow rocky shore habitats of 1988; Kinoshita & Fujita 1988; Inoue, Suda & Sano 2005, south-western Japan. Yube et al. 2006). The apparent paucity of ecological Sea basses of the genus Lateolabrax are common information on adult L. latus is due mainly to the difficulty coastal fishes that constitute important elements of of specimen collection and observation on exposed rocky commercial and recreational fisheries in East Asia including shores where adult individuals are known to occur. In Japan, Korea and China. The blackfin sea bass, Lateolabrax order to build a more comprehensive understanding of the latus, is considered to have a relatively limited distribution, ecological roles of a predatory species in shallow coastal mainly occurring on rocky shores of southern Japan, while waters, it is vital to elucidate their patterns of resource a congener L. japonicus occurs widely in both open and utilisation, particularly at the adult stage when the level and inner coastal areas including estuaries, and occasionally in impacts of resource consumption are higher. rivers from northern Japan to southern coasts of the Korean The objective of the present study is to quantitatively Peninsula (Hatooka 2002). analyse the foraging ecology of adult L. latus on a While a good number of studies have dealt with temperate-subtropical rocky shore. We relied on intensive different ecological aspects of L. japonicus (e.g., Mito 1957; line-fishing surveys to obtain numerically adequate data on Hatanaka & Sekino 1962; Matsumiya, Mitani & Tanaka adult individuals. 1982; Matsumiya, Masumoto & Tanaka 1985; Nip, Ho & sizes of the artificial lure baits used, 70-140 mm in length, Materials and Methods meant that fish individuals targeted were skewed towards larger sizes (i.e. adult stage), as intended in the present Study site and fish collection study. Fish collection was conducted at least once in three weeks. Collection effort was raised once a fish was captured Fish samples were collected within a radius of 3 km of the or some responses (biting/chasing) were obtained and Amakusa Marine Biological Laboratory, Kyushu University discontinued when there was no sign of fish (with a minimum (32˚32'N, 130˚02'E), located in the north-western corner of effort of once in three weeks). Time of capture, total body the Amakusa-Shimoshima Island, south-western Japan. length (TL, to the nearest 0.5 cm) and body weight (to the This area has a variety of shore habitats at the scale of nearest 0.1 kg) were recorded. several kilometers with complex and occasionally strong currents at the entrance of the Ariake Bay facing the East Gut contents China Sea (Tokeshi and Arakaki 2011). The sampling sites were moderately exposed rocky shores with a gentle A total of 112 individuals of Lateolabrax latus (i.e. 60% slope and a tidal amplitude of about 3.5 m: the shores were of those captured in April 2004 - March 2007, size range exposed for a distance of about 80-120 m seaward at the 39.0 - 73.0 cm) were subjected to gut content analysis. low tide (Fig 1). The substrates were variable and consisted Samples were preserved in 10% formalin and gut contents mainly of rocks and boulders with patchy occurrence of were sorted and identified to broad taxonomic categories. seaweeds, especially in winter to spring season. Water Samples were rinsed in 70% ethanol before being labelled, temperature was monitored with a data logger (HOBO Water dried to constant weight at 60˚C. Preliminary observation Temp Pro v2, onset) at 7 m depth. Using this record, 3-day indicated that both ripe and spent gonads were observed mean temperature trends were worked out to determine the in March while no spent gonad was found before March. annual minimum and the maximum temperature with the Fish samples were therefore divided into two groups, “pre- period from the former to the latter being defined as the ‘rising’ spawning” (October to February, n = 53) and “post-spawning” period and the opposite as the ‘declining’ period. (March to July, n = 59) (see Supplementary Information). Lateolabrax latus individuals (Fig 1) were collected Mean sizes of fishes for gut contents analyses were not during daylight hours (including twilight) between January significantly different between the pre-spawning and the 2000 and March 2007 (except January-February 2006) by post-spawning group (Mann-Whitney U test, P > 0.05). line fishing from the shore using artificial lure baits. The The percentage occurrence of each prey item (%O) was © 2014 SCESAP - 15 - Coastal Ecosystems, 2014, Vol 1, 14-27 Arakaki S et al. Foraging by a large opportunistic predator Fig. 1 (a) Study site at low tide: a moderately-exposed shallow rocky shore, (b) Lateolabrax latus in the pre-spawning season (November), an individual with ‘average’ (common) body size (50 cm TL) in this study and (c) samples of a large (upper, 71 cm TL) and a small (lower, 38.5 cm TL) individual of Lateolabrax latus in the post-spawning season (April). © 2014 SCESAP - 16 - Coastal Ecosystems, 2014, Vol 1, 14-27 Arakaki S et al. Foraging by a large opportunistic predator calculated as the proportion of the total number of guts (of L. latus individuals) containing it, while abundance and Results dry weight data of prey were used to calculate the mean percentage number (%N) and weight (%W) of each prey Fish occurrence item in the guts. One way ANOSIM and nMDS were then used to identify A total of 409 individuals of Lateolabrax latus were collected differences in gut contents between the two sampling in the course of this study. There were two clear modes of seasons based on Bray-Curtis similarities with log(x+1) fish occurrence in spring and autumn, while no individual transformed
Load more

Recommended publications
  • R M , July1979 Rum, Jlilio1979
    FA0 Fisheriee Circular No. 706 FIR/C706 FA0 Cimulaire mur lee p8ohes No 706 FAO, CirouLerem de Pom~fbNo 706 SELECTED BIBLIOUUPHY ON PELAGIC FISH EGG AND LARVA SURVEYS BIBLIOWHIE SELECTIVE SUR LES PROSPECTIONS D'OEUFS ET DE LAFNFS DE POISSONS PELAGIQUES BIBLIOWA SELECCIONADA SOBRE RECONOCIMIEN'IQS DE HUEVOS Y LARVAS DE PECES PEZAOICOS Prepared by/Prdparge par/Preparada por Paul E. Smith Southwest Fisheries Center La Jolla, California, U.S.A. t /Y Sally L. Richardem Oregon State University Corvallis, Oregon, U.S.A. FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS ORGANISATION DES NATIONS UNIES POUR L'ALIMZNTATIW ET L'AaRICUL'NRE ORC;BFIZACI(YN DE LAS NACI- UNIDAS PAR4 LA AaRICUL"RA Y LA ALIMENTACION Rm, July1979 Ram, juillet 1979 Rum, jlilio1979 -1- 1. SCOPE, COVERAGE AND ORGAMI~TION This bibliography is intended to provide aocass to published information on ichthyo- plankton survey methods, identification of fish -,and larvae, and results of meyn thet have been carried out in the put. Although the bibliograpb in selective, its coverage in- cludes all published works through 1973, and it htu been extended by the addition of all papers resented at the Oban Symposium and publinhed in the eJwposiun proceedings (Blazter, J.H.S. red.) 1974. The early life history of firh. SpringarcVerlsg, Berlin). The fint five seotiau of this bibliomp4y list worh by name and drte anly aooordinn to subject category. Section 2 containe refer.noe8 on survey equipment and mothods. Section 3 includes descriptions of early life rtages organized by taxonomic group. Section 4 lists references on species identification of fish aggm and larva4 by region (specifically, by FA0 etatietical area).
    [Show full text]
  • Genetic Analysis of Whole Mitochondrial Genome of Lateolabrax Maculatus (Perciformes: Moronidae) Indicates the Presence of Two Populations Along the Chinese Coast
    ZOOLOGIA 37: e49046 ISSN 1984-4689 (online) zoologia.pensoft.net RESEARCH ARTICLE Genetic analysis of whole mitochondrial genome of Lateolabrax maculatus (Perciformes: Moronidae) indicates the presence of two populations along the Chinese coast Jie Gong 1,2, Baohua Chen 1,2, Bijun Li 1, Zhixiong Zhou 1, Yue Shi 1, Qiaozhen Ke 1,3, Dianchang Zhang 4, Peng Xu 1,2,3 1Fujian Key Laboratory of Genetics and Breeding of Marine Organisms, Xiamen University. 361000 Xiamen, China. 2Shenzhen Research Institute, Xiamen University. 518000 Shenzhen, China. 3State Key Laboratory of Large Yellow Croaker Breeding, Ningde Fufa Fisheries Company Limited. 352130 Ningde, China. 4South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences. 510300 Guangzhou, China. Corresponding author: Peng Xu ([email protected]) http://zoobank.org/B5BBA46C-7FC5-44C3-B9CE-19F8E93FAA1C ABSTRACT. The whole mitochondrial genome of Lateolabrax maculatus (Cuvier, 1828) was used to investigate the reasons for the observed patterns of genetic differentiation among 12 populations in northern and southern China. The haplotype diversity and nucleotide diversity of L. maculatus were 0.998 and 0.00169, respectively. Pairwise FST values between popula- tions ranged from 0.001 to 0.429, correlating positively with geographic distance. Genetic structure analysis and haplotype network analysis indicated that these populations were split into two groups, in agreement with geographic segregation and environment. Tajima’s D values, Fu’s Fs tests and Bayesian skyline plot (BSP) indicated that a demographic expansion event may have occurred in the history of L. maculatus. Through selection pressure analysis, we found evidence of significant negative selection at the ATP6, ND3, Cytb, COX3, COX2 and COX1 genes.
    [Show full text]
  • Differential Population Structuring and Demographic History of Two Closely
    Molecular Phylogenetics and Evolution 39 (2006) 799–811 www.elsevier.com/locate/ympev DiVerential population structuring and demographic history of two closely related Wsh species, Japanese sea bass (Lateolabrax japonicus) and spotted sea bass (Lateolabrax maculatus) in Northwestern PaciWc Jin-Xian Liu a,b,c,1, Tian-Xiang Gao b,1, Koji Yokogawa d, Ya-Ping Zhang a,c,¤ a Laboratory of Cellular and Molecular Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, China b The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, Shandong 266003, China c Laboratory for Conservation and Utilization of Bio-resource, Yunnan University, Kunming, Yunnan 650091, China d 13-5 Higashihama, Tadotsu-cho, Nakatado-gun Kagawa Pref., 764-0016, Japan Received 28 September 2005; revised 23 December 2005; accepted 6 January 2006 Available online 28 February 2006 Abstract The Quaternary cold periods in the Northwestern PaciWc are thought to have heavily inXuenced the amount and distribution of intra- speciWc genetic variation in marine Wshes. To estimate the demographic history and genetic structure of Lateolabrax maculatus and L. japonicus in the Northwestern PaciWc, 256 individuals were sampled from 19 localities throughout the distribution range of the two species. Mitochondrial DNA variation was analyzed using DNA sequence data from the cytochrome b gene and control region. Nucleo- tide diversity was much higher in L. japonicus (0.030) than in L. maculatus (0.012). The demographic history of the two species was exam- ined using neutrality tests and mismatch distribution analyses and results indicated Pleistocene population expansion in both species.
    [Show full text]
  • 5Th Indo-Pacific Fish Conference
    )tn Judo - Pacifi~ Fish Conference oun a - e II denia ( vernb ~ 3 - t 1997 A ST ACTS Organized by Under the aegis of L'Institut français Société de recherche scientifique Française pour le développement d'Ichtyologie en coopération ' FI Fish Conference Nouméa - New Caledonia November 3 - 8 th, 1997 ABSTRACTS LATE ARRIVAL ZOOLOGICAL CATALOG OF AUSTRALIAN FISHES HOESE D.F., PAXTON J. & G. ALLEN Australian Museum, Sydney, Australia Currently over 4000 species of fishes are known from Australia. An analysis ofdistribution patterns of 3800 species is presented. Over 20% of the species are endemic to Australia, with endemic species occuiring primarily in southern Australia. There is also a small component of the fauna which is found only in the southwestern Pacific (New Caledonia, Lord Howe Island, Norfolk Island and New Zealand). The majority of the other species are widely distributed in the western Pacific Ocean. AGE AND GROWTH OF TROPICAL TUNAS FROM THE WESTERN CENTRAL PACIFIC OCEAN, AS INDICATED BY DAILY GROWm INCREMENTS AND TAGGING DATA. LEROY B. South Pacific Commission, Nouméa, New Caledonia The Oceanic Fisheries Programme of the South Pacific Commission is currently pursuing a research project on age and growth of two tropical tuna species, yellowfm tuna (Thunnus albacares) and bigeye tuna (Thunnus obesus). The daily periodicity of microincrements forrned with the sagittal otoliths of these two spceies has been validated by oxytetracycline marking in previous studies. These validation studies have come from fishes within three regions of the Pacific (eastem, central and western tropical Pacific). Otolith microincrements are counted along transverse section with a light microscope.
    [Show full text]
  • A Molecular Phylogeny of the Sparidae (Perciformes: Percoidei)
    W&M ScholarWorks Dissertations, Theses, and Masters Projects Theses, Dissertations, & Master Projects 2000 A molecular phylogeny of the Sparidae (Perciformes: Percoidei) Thomas M. Orrell College of William and Mary - Virginia Institute of Marine Science Follow this and additional works at: https://scholarworks.wm.edu/etd Part of the Genetics Commons, and the Zoology Commons Recommended Citation Orrell, Thomas M., "A molecular phylogeny of the Sparidae (Perciformes: Percoidei)" (2000). Dissertations, Theses, and Masters Projects. Paper 1539616799. https://dx.doi.org/doi:10.25773/v5-x8gj-1114 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 manuscript has been reproduced from the microfilm master. UMI films the text directly from (he original or copy submitted. Thus, some thesis and dissertation copies are in typewriter face, while others may be from any type of computer printer. The quality of this reproduction is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bieedthrough, substandard margins, and improper alignment can adversely affect reproduction. In the unlikely event that the author did not send UMI a complete manuscript and there are missing pages, these will be noted. Also, if unauthorized copyright material had to be removed, a note will indicate the deletion. Oversize materials (e.g., maps, drawings, charts) are reproduced by sectioning the original, beginning at the upper left-hand comer and continuing from left to right in equal sections with small overlaps.
    [Show full text]
  • 1 Japanese Seabass
    JAPANESE SEABASS – Lateolabrax japonicus Lateolabrax japonicus is a coastal perch species found in brackish and marine waters in the Western Pacific, from Japan to the South China Sea. It is known commonly as Japanese sea bass, Japanese seaperch, or Suzuki in Japan. Two other species of “sea bass” native to Asia are also marketed under similar common names: the Asian sea bass or barramundi (Lates calcarifer), and the Korean sea bass or blackfin sea bass (Lateolabrax latus). Further, the spotted sea bass (Lateolabrax maculatus) is considered a sister species to Lateolabrax japonicus that was only formally recognized in 1996 (Yokogawa, 2019). General aspects of small (fingerling) and large (adult) individuals of Lateolabrax japonicus (A, B), L.maculatus (C, D) and L. latus (E, F) in fresh condition. (source: Yokogawa, 2019). Lateolabrax japonicus, the Japanese sea bass, is an important species to the region, providing for commercial fisheries, recreational opportunities, and aquaculture production. According to the FAO, Japan accounts for the largest wild capture fishery for Lateolabrax japonicus, followed by Korea, and Taiwan, amounting to a total of 8,146 tonnes of global marine landings in 2017. However, aquaculture production of this species far surpasses capture fisheries, with a total of 166,340 tonnes of L. japonicus global aquaculture production in 2017. The vast majority of this comes from China (approximately 94%), followed by Taiwan where much research has gone in to fry and fingerling production. Korea also produces a small amount of L. japonicus through aquaculture, largely for domestic consumption. Japanese Sea Bass farmed risk assessment November 2020 1 Farmed Lateolabrax japonicus is not listed on the Monterey Bay Aquarium’s Seafood Watch, FishChoice, or the Aquaculture Stewardship Council.
    [Show full text]
  • Taxonomy and Ecology of the Deep-Pelagic Fish Family Melamphaidae, with Emphasis on Interactions with a Mid- Ocean Ridge System
    TAXONOMY AND ECOLOGY OF THE DEEP-PELAGIC FISH FAMILY MELAMPHAIDAE, WITH EMPHASIS ON INTERACTIONS WITH A MID- OCEAN RIDGE SYSTEM by Kyle Allen Bartow A Dissertation Submitted to the Faculty of The Charles E. Schmidt College of Science in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy Florida Atlantic University Boca Raton, FL December 2010 Copyright by Kyle Bartow 2010 ii ACKNOWLEDGEMENTS The research in this dissertation is due to funding from Tracey Sutton from the U.S. National Science Foundation Ocean Sciences Division – Biological Oceanography Program (OCE 0623568). Funding for travel and tuition were received for various parts of this project from Florida Atlantic University and Virginia Institute of Marine Science. I am grateful to the crew of the RV G.O. Sars, MAR-ECO and the staff of the Bergen Museum for the collection and curation of samples. I would also like to thank the U.S. National Museum of Natural History - Division of Fishes for allowing me into their enormous collection of melamphaid fishes and being so flexible and accommodating during the largest blizzard I've ever been in. The final entity that I would like to thank is MAR-ECO, through whose association I have been afforded many of these opportunities. I would like to thank Tracey Sutton for initially believing in me and my interest in deep-sea fish and research. Tracey not only offered me a place to fulfill my goals, but offered much support and encouragement during many of my trials and tribulations. Thanks are also due to the members of my advisory committee: Edie Widder, Jon Moore, C.
    [Show full text]
  • The Evolution of the Immune System: Conservation and Diversification
    Title The Evolution of the Immune System Conservation and Diversification Page left intentionally blank The Evolution of the Immune System Conservation and Diversification Davide Malagoli Department of Life Sciences Biology Building, University of Modena and Reggio Emilia, Modena, Italy AMSTERDAM • BOSTON • HEIDELBERG • LONDON NEW YORK • OXFORD • PARIS • SAN DIEGO SAN FRANCISCO • SINGAPORE • SYDNEY • TOKYO Academic Press is an imprint of Elsevier Academic Press is an imprint of Elsevier 125 London Wall, London EC2Y 5AS, United Kingdom 525 B Street, Suite 1800, San Diego, CA 92101-4495, United States 50 Hampshire Street, 5th Floor, Cambridge, MA 02139, United States The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, UK Copyright © 2016 Elsevier Inc. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher. Details on how to seek per- mission, further information about the Publisher’s permissions policies and our arrangements with organizations such as the Copyright Clearance Center and the Copyright Licensing Agency, can be found at our website: www.elsevier.com/permissions. This book and the individual contributions contained in it are protected under copyright by the Publisher (other than as may be noted herein). Notices Knowledge and best practice in this field are constantly changing. As new research and experience broaden our understanding, changes in research methods, professional practices, or medical treatment may become necessary. Practitioners and researchers must always rely on their own experience and knowledge in evaluating and using any information, methods, compounds, or experiments described herein.
    [Show full text]
  • Cold Adaptation in Antarctic Notothenioids
    International Journal of Molecular Sciences Article Cold Adaptation in Antarctic Notothenioids: Comparative Transcriptomics Reveals Novel Insights in the Peculiar Role of Gills and Highlights Signatures of Cobalamin Deficiency Federico Ansaloni 1,2 , Marco Gerdol 1,* , Valentina Torboli 1, Nicola Reinaldo Fornaini 1,3, Samuele Greco 1 , Piero Giulio Giulianini 1 , Maria Rosaria Coscia 4, Andrea Miccoli 5 , Gianfranco Santovito 6 , Francesco Buonocore 5 , Giuseppe Scapigliati 5,† and Alberto Pallavicini 1,7,8,† 1 Department of Life Sciences, University of Trieste, 34127 Trieste, Italy; [email protected] (F.A.); [email protected] (V.T.); [email protected] (N.R.F.); [email protected] (S.G.); [email protected] (P.G.G.); [email protected] (A.P.) 2 International School for Advanced Studies, 34136 Trieste, Italy 3 Department of Cell Biology, Charles University, 12800 Prague, Czech Republic 4 Institute of Biochemistry and Cell Biology, National Research Council of Italy, 80131 Naples, Italy; [email protected] 5 Department for Innovation in Biological, Agro-Food and Forest Systems, University of Tuscia, 01100 Viterbo, Italy; [email protected] (A.M.); [email protected] (F.B.); [email protected] (G.S.) 6 Department of Biology, University of Padua, 35131 Padua, Italy; [email protected] 7 Anton Dohrn Zoological Station, 80122 Naples, Italy 8 National Institute of Oceanography and Experimental Geophysics, 34010 Trieste, Italy * Correspondence: [email protected] Citation: Ansaloni, F.; Gerdol, M.; † These authors contributed equally to this work. Torboli, V.; Fornaini, N.R.; Greco, S.; Giulianini, P.G.; Coscia, M.R.; Miccoli, A.; Santovito, G.; Buonocore, F.; et al.
    [Show full text]
  • Hermaphroditism in Fish
    Tesis doctoral Evolutionary transitions, environmental correlates and life-history traits associated with the distribution of the different forms of hermaphroditism in fish Susanna Pla Quirante Tesi presentada per a optar al títol de Doctor per la Universitat Autònoma de Barcelona, programa de doctorat en Aqüicultura, del Departament de Biologia Animal, de Biologia Vegetal i Ecologia. Director: Tutor: Dr. Francesc Piferrer Circuns Dr. Lluís Tort Bardolet Departament de Recursos Marins Renovables Departament de Biologia Cel·lular, Institut de Ciències del Mar Fisiologia i Immunologia Consell Superior d’Investigacions Científiques Universitat Autònoma de Barcelona La doctoranda: Susanna Pla Quirante Barcelona, Setembre de 2019 To my mother Agraïments / Acknowledgements / Agradecimientos Vull agrair a totes aquelles persones que han aportat els seus coneixements i dedicació a fer possible aquesta tesi, tant a nivell professional com personal. Per començar, vull agrair al meu director de tesi, el Dr. Francesc Piferrer, per haver-me donat aquesta oportunitat i per haver confiat en mi des del principi. Sempre admiraré i recordaré el teu entusiasme en la ciència i de la contínua formació rebuda, tant a nivell científic com personal. Des del primer dia, a través dels teus consells i coneixements, he experimentat un continu aprenentatge que sens dubte ha derivat a una gran evolució personal. Principalment he après a identificar les meves capacitats i les meves limitacions, i a ser resolutiva davant de qualsevol adversitat. Per tant, el meu més sincer agraïment, que mai oblidaré. During the thesis, I was able to meet incredible people from the scientific world. During my stay at the University of Manchester, where I learned the techniques of phylogenetic analysis, I had one of the best professional experiences with Dr.
    [Show full text]
  • Humane Slaughter of Finfish Farmed Around the World
    HSA report February 2018 Humane slaughter of finfish farmed around the world Summary Approximately 360 species of finfish are farmed worldwide and it has been estimated that at least tens of billions of individual farmed fish might be slaughtered every year, which is a far greater number than all the individuals of any other type of farmed vertebrate animal. Finfish are considered capable of experiencing fear and pain and legislation exists in some parts of the world (e.g. the EU) to protect their welfare. Unfortunately, the most common methods of slaughtering finfish (e.g. asphyxia in air or hypothermia in ice slurry) are likely to cause considerable distress. A minority of species (e.g. Atlantic salmon, rainbow trout) in a small number of, mostly European, countries are routinely stunned using higher-welfare methods but there is no one-size-fits-all set of stunning parameters for all species of fish. Funds are required for scientific research and technological development to refine, and to develop new (e.g. SPUC), humane methods of slaughter and to determine humane stunning parameters for a greater range of species of finfish, to suit their various rearing environments and to minimise handling and movement prior to death which can cause stress and chemical and physical deterioration in product quality. Funds are limited, as is legislation requiring stunning of fish at slaughter, and sophisticated stunning equipment is typically expensive, so applying scientific research to improve fish welfare in-practice will likely be a slow process, partly also because the majority of finfish are farmed in countries where the concept of how improved animal welfare can benefit product quality is in its infancy, so finfish species must be prioritised in terms of the greatest outcome.
    [Show full text]
  • Morphology and Evolution of Bioluminescent Organs in the Glowbellies (Percomorpha: Acropomatidae) with Comments on the Taxonomy and Phylogeny of Acropomatiformes
    Received: 5 July 2018 Revised: 9 August 2018 Accepted: 22 August 2018 DOI: 10.1002/jmor.20894 RESEARCH ARTICLE Morphology and evolution of bioluminescent organs in the glowbellies (Percomorpha: Acropomatidae) with comments on the taxonomy and phylogeny of Acropomatiformes Michael J. Ghedotti1 | Josephine N. Gruber1 | Ryan W. Barton1 | Matthew P. Davis2 | W. Leo Smith3 1Department of Biology, Regis University, Denver, Colorado Abstract 2Department of Biological Sciences, St. Cloud Bioluminescent organs have evolved many times within teleost fishes and exhibit a wide range State University, St. Cloud, Minnesota of complexity and anatomical derivation. Although some bioluminescent organs have been stud- 3Department of Ecology and Evolutionary ied in detail, the morphology of the bacterial light organs in glowbellies (Acropoma) is largely Biology and Biodiversity Institute, University unknown. This study describes the anatomy of the bioluminescent organs in Haneda's Glowbelly of Kansas, Lawrence, Kansas (Acropoma hanedai) and the Glowbelly (Acropoma japonicum) and places the evolution of this Correspondence Michael J. Ghedotti, Department of Biology, light-producing system in the context of a new phylogeny of glowbellies and their relatives. Regis University, 3333 Regis Boulevard, Gross and histological examination of the bioluminescent organs indicate that they are derived Denver, CO 80221-1099. from perianal ectodermal tissue, likely originating from the developmental proctodeum, contrary Email: [email protected] to at least one prior suggestion that the bioluminescent organ in Acropoma is of endodermal Funding information intestinal derivation. Additionally, anterior bioluminescent organ development in both species is Division of Environmental Biology, Grant/ Award Number: 12581411543654; Regis associated with lateral spreading of the bacteria-containing arms of the bioluminescent organ University Research and Scholarship Council, from an initial median structure.
    [Show full text]