DOCSLIB.ORG

Ecology of Midwater Zooplankton and Fishes Off Eastern Tasmania, Australia

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Ecology of Midwater Zooplankton and Fishes Off Eastern Tasmania, Australia JOCK YOUNG, Hippoly te Rock, S.E. Tasmania 1994, oil on linen, 61x121.Scm ECOLOGY OF MIDWATER ZOOPLANKTON AND FISHES OFF EASTERN TASMANIA, AUSTRALIA by Jock W. Young (BSc MSc) Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy University of Tasmania March 1998 DECLARATION AND AUTHORITY OF ACCESS I hereby declare that the material in this thesis is original except where due acknowledgment is given, and that the material has not been accepted for the award of any other degree or diploma. This thesis may be available for loan and limited copying in accordance with the Copyright Act 1968. Jock W. Young ii ABSTRACT This thesis examines the ecology of zooplankton, midwater fishes and top predators off the east coast of Tasmania in relation to the regional oceanography. This work was completed from small (<15 m) to large (60 + m) fishing and fisheries research vessels using nets ranging from fine-meshed plankton nets (100 µm) to large midwater trawls (cod end mesh size 10 mm). Further data was obtained from the Maria Island hydrographic station and the AFZ observer program. The study area was situated in and around the northern edge of the subtropical convergence zone. This zone separates the most southern edge of the East Australia Current from the broader subtropical convergence and subantarctic water to the south. The latitudinal position of this front depends not only on the time of year - in the summer it extends southward and retreats in winter - but also on interannual cycles such as the El Nino Southern Oscillation. On the shelf the distribution and biomass of the major zooplankton species, Nyctiphanes australis, was closely related to fluctuations in these water masses. This species is central to the shelf food web - it is, at times, the main prey for predators ranging in size from larval fishes (eg. those of jack mackerel Trachurus declivis) to large southern bluefin tuna (Thunnus maccoyii). In autumn, when its biomass is highest, schools of its main fish predator, jack mackerel form on the surface over the shelf where they are fished commercially. The central position of N. australis in the shelf food web was demonstrated in the summer of 1988/89 when warm waters from an anti El Nino event flushed the shelf resulting in the disappearance of the krill and the subsequent collapse of the jack mackerel fishery. Over the continental slope a suite of myctophid species dominated the water column. These lanternfish aggregate in dense schools over the slope in spring and summer, migrating to the surface at dusk and descending before dawn to depths bet~een 300- 500 m. Their horizontal distribution is restricted mainly to a thin band (-500 m wide) over the 300 m contour. One of these, Lampanyctodes hectoris, was central to the upper slope food web. Examination of the reproductive cycles of L. hectoris and other abundant lanternfish showed multiple spawning over winter. The winter spawning is presumably timed so that juveniles can take advantage of increased prey iii levels, mainly euphausiids, which are generated by the spring bloom. Growth in L. hectoris, which lives up to 3 years, is fastest at this time. In winter they are scarce over the slope. The reasons for this scarcity are not clear, but it is at least partly due to the massive predation on them. However, lack of feed - copepods are the main prey over winter - may limit the size of aggregations that can be sustained. The concentrations of lanternfishes during spring and summer form the basis of a food chain supporting larger fishes such as blue grenadier (Macruronus novaezelandiae) and jack mackerel, and during summer, other larger lanternfish such as Diaphus danae. Offshore, a more diverse community of midwater fishes was identified, which, although similar among the different water masses, was significantly different in the surface waters of the East Australia Current, the result of a relative increase in species of subtropical origin. Densities were an order of magnitude lower than that found for the slope lanternfish. The diets of lanternfish ~ffshore were dominated by calanoid copepods, particularly those of the genus Plueromamma. Non-myctophids within the same size range ate a wider range of prey. Some, such as the Stomiatoid genus Chauliodus, were entirely piscivorous on lanternfish. Estimation of the relative biomass of zooplankton and micronekton from the main geographic and oceanographic regions of the area showed that shelf biomass was significantly higher than that offshore. This increased biomass appears to be derived from a mixture of subtropical convergence water washing over the shelf and shelf­ break upwelling. The higher biomass over the shelf was reflected in the daily ration of shelf-caught southern bluefin tuna (Thunnus maccoyii), which fed mainly on jack mackerel and had rations -3 times that of offshore-caught tuna. I identified 10 trophic categories off eastern Tasmania across the shelf to the open sea. These were-large pelagic omnivores (eg. Thunnus maccoyii), pelagic omnivores (eg. Trachurus declivis), pelagic piscivores (eg. Brama brama), small mesopelagic omnivores (eg. Diaphus danae, Lampanyctus australis and Chauliodus sloanii), neritic planktivores (eg. Lampanyctodes hectoris), bathypelagic omnivores (eg. Hoplostethus atlanticus), squid (eg. Nototodarus gouldii), gelatinous zooplankton (eg. Pyrosoma pyrosoma), oceanic (eg. Pleuromamma spp. and Phronima sedentaria) and shelf (eg. Nyctiphanes australis) zooplankton. iv A common theme, which has run through many of these studies, was the link between inshore and offshore processes. Although the dominant zooplankton and micronekton species were usually restricted in their distributions (eg. Nyctiphanes australis with the shelf), their main predators moved freely between the inshore and offshore waters. I believe that the movements of these predators are determined largely by prey availability. Thus, prey availability, itself dependent upon seasonal and interannual cycles in the regional oceanography, appears to drive much of the seasonal and interannual patterns of abundance of larger fishes in the region. Two of these species, jack mackerel and southern bluefin tuna, are the focus of commercial fisheries. Their effective management therefore will need to consider (1) the I dependence of the tuna on the mackerel and (2) that both species in this area depend, either directly or indirectly on krill stocks, which in tum depend on the fluctuations of the regional oceanography. Finally, over the period of this study there have been a number of advances both in techniques and technologies in the study of midwater communities. I have therefore summarised those techniques and approaches to studying the midwater that I think have benefited this area of research. I have also identified some of the difficulties that need addressing. v ACKNOWLEDGMENTS This thesis is the result of work I have completed over ten years working as a marine biologist with CSIRO Division of Fisheries in Hobart, Tasmania (now Division of Marine Research). All of the work has resulted from trips to sea along the coast of Tasmania. By its very nature working at sea requires a good deal of teamwork and this thesis would not have been possible without the efforts of the many people involved, far too many to list here. However, there are some that need mention. I would like to thank the captains and crews of Fisheries Research Vessels Scottsman, Challenger, Soela and Southern Surveyor with a special thanks to the fishing master of Southern Surveyor, Roger Pepper. I would also like to thank Dr Steve Blaber who led the original "Southern Program" study; Drs Vincent Lyne and Graham Harris, Mr Brian Griffiths and Ms Leslie Clementson who helped me understand the complexities of the physical and biological oceanography of the area. Dr Bob Johannes started me on the krill project and Alan Jordan provided enthusiasm and expertise in that field. Special thanks to Tim Lamb and Russ Bradford for their contribution to the offshore component of the project, and Wade Whitelaw for his role in liaising with the AFZ Observers. The published papers were the result of many revisions and I am indebted for the initial guidance offered by Drs Roy Harden Jones (former chief of CSIRO Division of Fisheries) and Vivienne Mawson. I have taken care to include as co-authors all those people who have materially helped in the resulting publications, primarily technical staff and line managers but also people from other organizations with whom I have collaborated. The latter are Dr R. Rose, University of Tasmania; Messrs Alan Jordan and Grant Pullen, Tasmanian Department of Sea Fisheries. However, the results obtained and conclusions drawn are my own. Finally, I would like to thank Dr Barbara Nowak for supervising this thesis. vi CONTENTS Chapter 1 General Introduction ............................................................................. 1 Background ......................................................................................... 2 The Fisheries and Fauna off Eastern Tasmania .............................. 4 Biological Oceanography of Eastern Tasmania .............................. 5 The Study Area ........................................................................... 5 Seasonal and Interannual Changes .............................................. 7 Inshore/Offshore Processes ......................................................... 7 Aims and Structure of the Thesis .....................................................
Load more

Recommended publications
  • Redalyc.A Review of the Flatfish Fisheries of the South Atlantic Ocean
    Revista de Biología Marina y Oceanografía ISSN: 0717-3326 [email protected] Universidad de Valparaíso Chile Díaz de Astarloa, Juan M. A review of the flatfish fisheries of the south Atlantic Ocean Revista de Biología Marina y Oceanografía, vol. 37, núm. 2, diciembre, 2002, pp. 113-125 Universidad de Valparaíso Viña del Mar, Chile Available in: http://www.redalyc.org/articulo.oa?id=47937201 How to cite Complete issue Scientific Information System More information about this article Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Journal's homepage in redalyc.org Non-profit academic project, developed under the open access initiative Revista de Biología Marina y Oceanografía 37 (2): 113 - 125, diciembre de 2002 A review of the flatfish fisheries of the south Atlantic Ocean Una revisión de las pesquerías de lenguados del Océano Atlántico sur Juan M. Díaz de Astarloa1 2 1CONICET, Departamento de Ciencias Marinas, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Funes 3350, 7600 Mar del Plata, Argentina. [email protected] 2 Current address: Laboratory of Marine Stock-enhancement Biology, Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University, kitashirakawa-oiwakecho, sakyo-ku, Kyoto, 606-8502 Japan. [email protected] Resumen.- Se describen las pesquerías de lenguados del Abstract.- The flatfish fisheries of the South Atlantic Atlántico sur sobre la base de series de valores temporales de Ocean are described from time series of landings between desembarcos pesqueros entre los años 1950 y 1998, e 1950 and 1998 and available information on species life información disponible sobre características biológicas, flotas, history, fleets and gear characteristics, and economical artes de pesca e importancia económica de las especies importance of commercial species.
    [Show full text]
  • An Observation of Two Oceanic Salp Swarms in the Tasman Sea: Thetys Vagina and Cyclosalpa Affinis Natasha Henschke1,2,3*, Jason D
    Henschke et al. Marine Biodiversity Records (2016) 9:21 DOI 10.1186/s41200-016-0023-8 MARINE RECORD Open Access An observation of two oceanic salp swarms in the Tasman Sea: Thetys vagina and Cyclosalpa affinis Natasha Henschke1,2,3*, Jason D. Everett1,2,3 and Iain M. Suthers1,2,3 Abstract Background: Large oceanic salps are rarely encountered. The highest recorded biomasses of the salps Thetys vagina (852 g WW m−3)andCyclosalpa affinis (1149 g WW m−3) were observed in the Tasman Sea during January 2009. Results: Due to their fast sinking rates the carcasses and faecal pellets of these and other large salps play a significant role in carbon transport to the seafloor. We calculated that faecal pellets from these swarms could have contributed up to 67 % of the mean organic daily carbon flux in the area. This suggests that the flux of carbon from salp swarms are not accurately captured in current estimates. Conclusion: This study contributes information on salp abundance and biomass to a relatively understudied field, improving estimates for biogeochemical cycles. Background (Henschke et al., 2013) can increase the carbon flux in an The role of gelatinous zooplankton, such as salps, pyro- area up to ten-fold the daily average (Fischer et al., 1988) somes and cnidarians, in ocean food webs and biogeo- for a sustained period of time (Smith et al. 2014). chemical cycling has garnered increased attention in Due to their regular occurrence (Henschke et al., recent years (Lebrato et al., 2011; Henschke et al., 2013; 2014) and coastal dominance (Henschke et al 2011), Lebrato et al., 2013; Smith et al.
    [Show full text]
  • Salp Contributions to Vertical Carbon Flux in the Sargasso Sea
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by College of William & Mary: W&M Publish W&M ScholarWorks VIMS Articles Virginia Institute of Marine Science 2016 Salp contributions to vertical carbon flux in the Sargasso Sea JP Stone Virginia Institute of Marine Science Deborah K. Steinberg Virginia Institute of Marine Science Follow this and additional works at: https://scholarworks.wm.edu/vimsarticles Part of the Aquaculture and Fisheries Commons Recommended Citation Stone, JP and Steinberg, Deborah K., "Salp contributions to vertical carbon flux in the Sargasso Sea" (2016). VIMS Articles. 797. https://scholarworks.wm.edu/vimsarticles/797 This Article is brought to you for free and open access by the Virginia Institute of Marine Science at W&M ScholarWorks. It has been accepted for inclusion in VIMS Articles by an authorized administrator of W&M ScholarWorks. For more information, please contact [email protected]. 1 Salp contributions to vertical carbon flux in the Sargasso 2 Sea 3 4 5 Joshua P. Stonea,*, Deborah K. Steinberga 6 a Department of Biological Sciences, Virginia Institute of Marine Science, College of William & Mary, 7 PO Box 1346, Gloucester Point, VA 23062, USA 8 * Corresponding author. 9 E-mail addresses: [email protected] (J. Stone), [email protected] (D. Steinberg) 10 11 1 © 2016. This manuscript version is made available under the Elsevier user license http://www.elsevier.com/open-access/userlicense/1.0/ 12 Abstract 13 We developed a one-dimensional model to estimate salp contributions to vertical carbon flux at the 14 Bermuda Atlantic Time-series Study (BATS) site in the North Atlantic subtropical gyre for a 17-yr period 15 (April 1994 to December 2011).
    [Show full text]
  • Coastal and Marine Ecological Classification Standard (2012)
    FGDC-STD-018-2012 Coastal and Marine Ecological Classification Standard Marine and Coastal Spatial Data Subcommittee Federal Geographic Data Committee June, 2012 Federal Geographic Data Committee FGDC-STD-018-2012 Coastal and Marine Ecological Classification Standard, June 2012 ______________________________________________________________________________________ CONTENTS PAGE 1. Introduction ..................................................................................................................... 1 1.1 Objectives ................................................................................................................ 1 1.2 Need ......................................................................................................................... 2 1.3 Scope ........................................................................................................................ 2 1.4 Application ............................................................................................................... 3 1.5 Relationship to Previous FGDC Standards .............................................................. 4 1.6 Development Procedures ......................................................................................... 5 1.7 Guiding Principles ................................................................................................... 7 1.7.1 Build a Scientifically Sound Ecological Classification .................................... 7 1.7.2 Meet the Needs of a Wide Range of Users ......................................................
    [Show full text]
  • The Origins of Chordate Larvae Donald I Williamson* Marine Biology, University of Liverpool, Liverpool L69 7ZB, United Kingdom
    lopmen ve ta e l B Williamson, Cell Dev Biol 2012, 1:1 D io & l l o l g DOI: 10.4172/2168-9296.1000101 e y C Cell & Developmental Biology ISSN: 2168-9296 Research Article Open Access The Origins of Chordate Larvae Donald I Williamson* Marine Biology, University of Liverpool, Liverpool L69 7ZB, United Kingdom Abstract The larval transfer hypothesis states that larvae originated as adults in other taxa and their genomes were transferred by hybridization. It contests the view that larvae and corresponding adults evolved from common ancestors. The present paper reviews the life histories of chordates, and it interprets them in terms of the larval transfer hypothesis. It is the first paper to apply the hypothesis to craniates. I claim that the larvae of tunicates were acquired from adult larvaceans, the larvae of lampreys from adult cephalochordates, the larvae of lungfishes from adult craniate tadpoles, and the larvae of ray-finned fishes from other ray-finned fishes in different families. The occurrence of larvae in some fishes and their absence in others is correlated with reproductive behavior. Adult amphibians evolved from adult fishes, but larval amphibians did not evolve from either adult or larval fishes. I submit that [1] early amphibians had no larvae and that several families of urodeles and one subfamily of anurans have retained direct development, [2] the tadpole larvae of anurans and urodeles were acquired separately from different Mesozoic adult tadpoles, and [3] the post-tadpole larvae of salamanders were acquired from adults of other urodeles. Reptiles, birds and mammals probably evolved from amphibians that never acquired larvae.
    [Show full text]
  • Towards an Understanding of Salp Swarm Dynamics. ICES CM 2002/N
    CM 2002/ N:12 Towards an understanding of salp swarm dynamics by Patricia Kremer ABSTRACT Species of salps are characterized by intermittent blooms. Several studies have documented the importance of physical processes both in providing seed stocks of salps and creating an environment that is favorable for the rapid increase of salp populations. Although salps are typically oceanic, most observations of bloom dynamics have been made in more accessible inshore waters, so it is difficult to assess how frequent and widespread these swarms are. A review and comparison of existing data is helping to define geographic “hot spots” for salp blooms as well as the necessary physical and biological precursors. Although at this point, the review is far from complete, several generalities are emerging. The details of the physical forcing functions vary, but the overall physical regime seems to require a region of pulsed mixing of oceanic water that results in a relatively high standing stock of autotrophs. For a salp bloom to occur, there also needs to be an adequate seed population of salps and sufficient sustained primary production to support the biomass of the salp population as the bloom develops. As non-selective filter feeders, salps are able to remove a wide range of particulates from the water column, transforming the undigested portion into fast sinking feces. Therefore, when salps occur at high densities, the water is characterized by low abundance of other plankton, with obvious trophic implications. Patricia Kremer: Marine Sciences, University of Connecticut, Groton CT 06340-6097, USA [tel: +1 860 405 9140; fax: +1 860 405 9153; e-mail [email protected]] INTRODUCTION Salps are holoplanktonic grazers that have a life history, feeding biology, and population dynamics that contrasts sharply to copepods and other crustacean zooplankton (Madin and Deibel 1998).
    [Show full text]
  • Biomass of Zooplankton and Micronekton in the Southern Bluefin Tuna Fishing Grounds Off Eastern Tasmania, Australia
    -- MARINE ECOLOGY PROGRESS SERIES Vol. 138: 1-14, 1996 Published July 25 , Mar Ecol Prog Ser Biomass of zooplankton and micronekton in the southern bluefin tuna fishing grounds off eastern Tasmania, Australia J. W. Young*, R. W. Bradford, T. D. Lamb, V. D. Lyne CSIRO Marine Laboratories, Division of Fisheries. GPO Box 1538. Hobart 7001, Tasmania, Australia ABSTRACT: The southern bluefin tuna (SBT) supports a seasonal fishery off the east coast of Tasmania, Australia. The distribution of zooplankton biomass in this region was examined as a means of finding out why the SBT are attracted to this area. We examined whether there was a particular area or depth stratum that supported significantly greater amounts of potential feed, directly or indirectly, for SBT Samples of zooplankton and micronekton were collected during the winter SBT fishery seasons in 1992-94. Five net types (mouth opening 0 25 to -80 m') w~thcodend mesh sizes ranging from 100 to 1000 pm were used. Samples were collected from 4 main hydrographic areas: warm East Australian Current water, cool subantarctic water, the front separating them (the subtrop~calconvergence), and the adjacent shelf. Four depth strata (50, 150, 250 and 350 m) were also sampled. In contrast to our expectations, the biomass in the subtropical convergence was no greater than that in the 3 other areas. Rather, it was the shelf, albeit with some inconsistencies, that generally had the greatest biomass of both zooplankton and micronekton. Offshore, there was no s~gnificantdifference in the biomass of the depth strata sampled, although the biomass of gelatinous zooplankton in the surface waters increased during the study period.
    [Show full text]
  • New Perspectives on the Evolution of Protochordate Sensory and Locomotory Systems, and the Origin of Brains and Heads*
    doi 10.1098/rstb.2001.0974 New perspectives on the evolution of protochordate sensory and locomotory systems, and the origin of brains and heads* Thurston C. Lacalli Biology Department, University of Saskatchewan, Saskatoon, Saskatchewan, Canada, S7N 5E2 ([email protected]) Cladistic analyses generally place tunicates close to the base of the chordate lineage, consistent with the assumption that the tunicate tail is primitively simple, not secondarily reduced from a segmented trunk. Cephalochordates (i.e. amphioxus) are segmented and resemble vertebrates in having two distinct loco- motory modes, slow for distance swimming and fast for escape, that depend on separate sets of motor neurons and muscle cells. The sense organs of both amphioxus and tunicate larvae serve essentially as navigational aids and, despite some uncertainty as to homologies, current molecular and ultrastructural data imply a close relationship between them. There are far fewer signs of modi¢cation and reduction in the amphioxus central nervous system (CNS), however, so it is arguably the closer to the ancestral condi- tion. Similarities between amphioxus and tunicate sense organs are then most easily explained if distance swimming evolved before and escape behaviour after the two lineages diverged, leaving tunicates to adopt more passive means of avoiding predation. Neither group has the kind of sense organs or sensory integration centres an organism would need to monitor predators, yet mobile predators with eyes were probably important in the early Palaeozoic. For a predator, improvements in vision and locomotion are mutually reinforcing. Both features probably evolved rapidly and together, in an `arms race'of eyes, brains and segments that left protochordates behind, and ultimately produced the vertebrate head.
    [Show full text]
  • Climate Change and Southern Ocean Resilience
    No.No. 52 5 l l JuneMay 20202021 POLARKENNAN PERSPECTIVES CABLE Adélie penguins on top of an ice flow near the Antarctic Peninsula. © Jo Crebbin/Shutterstock Climate Change and Southern Ocean Resilience REPORT FROM AN INTERDISCIPLINARY SCIENTIFIC WORKSHOP, MARCH 30, 2021 Andrea Capurroi, Florence Colleoniii, Rachel Downeyiii, Evgeny Pakhomoviv, Ricardo Rourav, Anne Christiansonvi i. Boston University Frederick S. Pardee Center for the Study of the Longer-Range Future ii. Istituto Nazionale di Oceanografia e di Geofisica Sperimentale Antarctic and Southern Ocean Coalition iii. Australian National University iv. University of British Columbia v. Antarctic and Southern Ocean Coalition vi. The Pew Charitable Trusts CONTENTS I. INTRODUCTION BY EVAN T. BLOOM 3 II. EXECUTIVE SUMMARY 5 III. CLIMATE CHANGE AND SOUTHERN OCEAN RESILIENCE 7 A. CLIMATE CHANGE AND THE SOUTHERN OCEAN 7 B. CONNECTION OF REGIONAL SOUTHERN OCEAN PROCESS TO GLOBAL SYSTEMS 9 C. UNDERSTANDING PROCESS CHANGES IN THE SOUTHERN OCEAN 10 D. ANTARCTIC GOVERNANCE AND DECISION MAKING 15 E. CONCLUSION 18 F. REFERENCES 19 POLAR PERSPECTIVES 2 No. 5 l June 2021 I. INTRODUCTION BY EVAN T. BLOOM vii Fig 1: Southern Ocean regions proposed for protection A network of MPAs could allow for conservation of distinct areas, each representing unique ecosystems As the world prepares for the Glasgow Climate Change Conference in November 2021, there is considerable focus on the Southern Ocean. The international community has come to realize that the polar regions hold many of the keys to unlocking our understanding of climate-related phenomena - and thus polar science will influence policy decisions on which our collective futures depend.
    [Show full text]
  • Plaice (Pleuronectes Platessä) Contents
    1-group plaice (Pleuronectes platessä) Contents Acknowledgements:............................................................................................................ 1 Abstract:.............................................................................................................................3 Chapter 1: General introduction.....................................................................................................4 Chapter 2: Fin-ray count variation in 0-group flatfish: plaice (Pleuronectesplatessa (L.)) and flounder (Platichthys flesus ( L.)) on the west coast of Ireland..............................15 Chapter 3: Variation in the fin ray counts of 0-group turbot (Psetta maxima L.) and brill (Scophthalmus rhombus L.) on the west coast of Ireland: 2006-2009.......................... 28 Chapter 4: Annual and spatial variation in the abundance length and condition of turbot (.Psetta maxima L.) on nursery grounds on the west coast of Ireland: 2000-2007.........41 Chapter 5: Variability in the early life stages of juvenile plaice (.Pleuronectes platessa L.) on west of Ireland nursery grounds; 2000 - 2007........................................................64 Chapter 6: The early life history of turbot (Psetta maxima L.) on nursery grounds along the west coast of Ireland: 2007 -2009, as described by otolith microstructure.............85 Chapter 7: The feeding ecology of 0-group turbot (Psetta maxima L.) and brill (Scophthalmus rhombus L.) on Irish west coast nursery grounds.................................96 Chapter
    [Show full text]
  • Redalyc.Record of the Rare Oceanic Salp Helicosalpa Komaii
    Revista Mexicana de Biodiversidad ISSN: 1870-3453 [email protected] Universidad Nacional Autónoma de México México Hereu, Clara M.; Suárez-Morales, Eduardo; Lavaniegos, Bertha E. Record of the rare oceanic salp Helicosalpa komaii (Tunicata: Thaliacea: Salpida) in the Northeast Pacific Revista Mexicana de Biodiversidad, vol. 85, núm. 2, 2014, pp. 624-629 Universidad Nacional Autónoma de México Distrito Federal, México Disponible en: http://www.redalyc.org/articulo.oa?id=42531364021 Cómo citar el artículo Número completo Sistema de Información Científica Más información del artículo Red de Revistas Científicas de América Latina, el Caribe, España y Portugal Página de la revista en redalyc.org Proyecto académico sin fines de lucro, desarrollado bajo la iniciativa de acceso abierto Revista Mexicana de Biodiversidad 85: 624-629, 2014 624 Hereu et al.- New record of Helicosalpa komaiiDOI: in 10.7550/rmb.36638 Northeast Pacific Research note Record of the rare oceanic salp Helicosalpa komaii (Tunicata: Thaliacea: Salpida) in the Northeast Pacific Registro de una especie oceánica rara de salpa Helicosalpa komaii (Tunicata: Thaliacea: Salpida) en el Pacífico nororiental Clara M. Hereu1 , Eduardo Suárez-Morales2 and Bertha E. Lavaniegos3 1Facultad de Ciencias, Universidad Autónoma de Baja California. Carretera Tijuana-Ensenada, Km 103, 22860 Ensenada, Baja California, Mexico. 2Departamento de Ecología y Sistemática Acuática, El Colegio de la Frontera Sur. Av. Centenario, Km 5.5, 77014 Chetumal, Quintana Roo, Mexico. 3Departamento de Oceanografía Biológica, Centro de Investigación y de Educación Superior de Ensenada. Carretera Tijuana-Ensenada Km 107, 22860 Ensenada, Baja California, Mexico. [email protected] Abstract. We report for the first time the presence of a rare salp Helicosalpa komaii (Ihle and Ihle-Landenberg, 1936) on the west coast of Baja California peninsula (26°52.7’ N, 117°09.2’ W).
    [Show full text]
  • High Abundance of Salps in the Coastal Gulf of Alaska During 2011
    See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/301733881 High abundance of salps in the coastal Gulf of Alaska during 2011: A first record of bloom occurrence for the northern Gulf Article in Deep Sea Research Part II Topical Studies in Oceanography · April 2016 DOI: 10.1016/j.dsr2.2016.04.009 CITATION READS 1 33 4 authors, including: Ayla J. Doubleday Moira Galbraith University of Alaska System Institute of Ocean Sciences, Sidney, BC, Cana… 3 PUBLICATIONS 16 CITATIONS 28 PUBLICATIONS 670 CITATIONS SEE PROFILE SEE PROFILE Some of the authors of this publication are also working on these related projects: l. salmonis and c. clemensi attachment sites: chum salmon View project All content following this page was uploaded by Moira Galbraith on 10 June 2016. The user has requested enhancement of the downloaded file. All in-text references underlined in blue are added to the original document and are linked to publications on ResearchGate, letting you access and read them immediately. Deep-Sea Research II ∎ (∎∎∎∎) ∎∎∎–∎∎∎ Contents lists available at ScienceDirect Deep-Sea Research II journal homepage: www.elsevier.com/locate/dsr2 High abundance of salps in the coastal Gulf of Alaska during 2011: A first record of bloom occurrence for the northern Gulf Kaizhi Li a, Ayla J. Doubleday b, Moira D. Galbraith c, Russell R. Hopcroft b,n a Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China b Institute of Marine Science, University of Alaska, Fairbanks, AK 99775-7220, USA c Institute of Ocean Sciences, Fisheries and Oceans Canada, P.O.
    [Show full text]