Consulta: subjectFacets:"Pelagic"
Registros recuperados: 15
Data/hora: 06/06/2024 01:17:31

The known and unknown about Marine Biodiversity in Ecuador (Continental and Insular)
Provedor de dados: 72
Autores: Cruz,Manuel; Gabor,Nikita; Mora,Elba; Jiménez,Roberto; Mair,James.
Ecuador has a high diversity of ecosystems in its coastal and marine territory with beaches, bays, estuaries, cliffs, coastal lagoons and rocky coasts being the most representative. So far, 1,859 marine species have been identified in Ecuador. Of these, 1380 species of non-commercial marine invertebrates and vertebrates, belonging to 8 Phyla and distributed in 25 groups or classes, occur along the coast of Ecuador. These are: Protozoans, 9 groups: Oceanic and estuarine Diatoms, Cyanophyta, Chlorophyta, Dinoflagellates, Coccolithophorida, Silicoflagellates, Euglenophyta, Tintinnids and planktonic and benthic Foraminifera; Cnidaria, 2 classes: Hydromedusae and Scyphomedusae; Mollusca, 5 classes: Wood-boring molluscs and rock-boring and benthic bivalves;...
Tipo: Journal article
Palavras-chave: Biodiversity; Pelagic; Demersal; Benthic; Gulf of Guayaquil.
Ano: 2003
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382003000200010

Physical-Chemical processes and Patterns of Diversity of the chilean eastern boundary pelagic and benthic marine ecosystems: An overview
Provedor de dados: 72
Autores: Escribano,Rubén; Fernández,Miriam; Aranís,Antonio.
The biological diversity of the Chilean marine ecosystem (CME) has recently become an issue of interest to Chilean scientists and authorities concerned about the impact of human activities and ongoing climate change on the structure, functioning, and sustainable use of this large marine region, recognized as one of the most productive ecosystems of the world`s is oceans. In this paper, the available information is examined in order to describe the major environmental characteristics of the CME and its associated flora and fauna, both in the benthic and pelagic systems, with the main goal of identifying environmental discontinuities and boundaries which may serve to define biogeographical units and characterize their biodiversity patterns. Physical and...
Tipo: Journal article
Palavras-chave: Biodiversity; Benthic; Chilean marine ecosystem; Conservation; Pelagic.
Ano: 2003
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382003000200008

Acoustic observations in the Bay of Biscay: Schooling, vertical distribution, species assemblages and behaviour
Provedor de dados: 5
Autores: Masse, Jacques.
Eight acoustic surveys were carried our in the Bay of Biscay, during 1989-94, to study the distribution and abundance of anchovy (Engraulis encrasicolus, L.) in that area. Acoustic data were stored using the INES/MOVIES acquisition and processing system. Species-specific distribution patterns were confirmed through complementary sampling with a mid-water trawl. This paper summarises the combination of technical procedures used for acoustic assessments, and the results of acoustic surveys in the Bay of Biscay that pertain to the dynamics of this stock. Information is presented on the distribution and abundance of anchovy and co-occuring species, and on the movement patterns detected within the pelagic fish community, in relation to environmental conditions....
Tipo: Text
Palavras-chave: Acoustic; Anchovy; Engraulis encrasicolus; Schooling; Pelagic; Behaviour; Bay of Biscay.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00191/30265/28719.pdf

Direct assessment of anchovy by the PELGAS04 acoustic survey
Provedor de dados: 5
Autores: Masse, Jacques; Beillois, Pierre; Duhamel, Erwan.
An acoustic survey was carried out in the bay of Biscay from April 27th to May 25th on board the French research vessel Thalassa. The objective of PELGAS04 survey was to study the abundance and distribution of pelagic fish in the Bay of Biscay. The target species were mainly sardine and anchovy but had to be considered in a multi-specific context. The results have to be used during ICES working groups in charge of the assessment of sardine, anchovy, mackerel and horse mackerel and in the frame of the Ifremer fisheries ecology program "resources variability".
Tipo: Text
Palavras-chave: Pelagic; FOREVAR; Bay of Biscay; Anchovy; Acoustic; Survey; ICES; PELGAS; Pélagique; FOREVAR; Golfe Gascogne; Anchois; Acoustique; Campagne océanographique; CIEM; PELGAS.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/acte-2295.pdf

Towards an Autonomous Pelagic Observatory: Experiences from Monitoring Fish Communities around Drifting FADs
Provedor de dados: 5
Autores: Brehmer, Patrice; Sancho, Gorka; Trygonis, Vasilis; Itano, David; Dalen, John; Fuchs, Ariel; Faraj, Abdelmalek; Taquet, Marc.
This work presents a methodological synthesis for the in situ monitoring of fish aggregating devices (FADs) using a combination of optical, echosounder and SCUBA observations conducted in the vicinity of drifting FADs. The acoustic methods allowed, according to the devices used, the description of the spatial organisation and dynamics of biotic scattering layers, individual fishes, schools, shoals and mammals, while visual, photographic and video observations permitted species identification within a range of 0 to ~ 25 m. Based on these results, we elaborate on the interest to combine acoustic and visual methods, and present an autonomous instrumented drifting buoy for remotely monitoring fish diversity and abundance in the pelagic ecosystems. The...
Tipo: Text
Palavras-chave: Optical; Census; Acoustics; Buoy; Seaorbiter; Biomonitoring; Conservation; Environmental monitoring; Fish; Pelagic.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00461/57252/59265.pdf

Remote Predictions of Mahi-Mahi (Coryphaena hippurus) Spawning in the Open Ocean Using Summarized Accelerometry Data
Provedor de dados: 5
Autores: Schlenker, Lela S.; Faillettaz, Robin; Stieglitz, John D.; Lam, Chi Hin; Hoenig, Ronald H.; Cox, Georgina K.; Heuer, Rachael M.; Pasparakis, Christina; Benetti, Daniel D.; Paris, Claire B.; Grosell, Martin.
Identifying complex behaviors such as spawning and fine-scale activity is extremely challenging in highly migratory fish species and is becoming increasingly critical knowledge for fisheries management in a warming ocean. Habitat use and migratory pathways have been extensively studied in marine animals using pop-up satellite archival tags (PSATs), but high-frequency data collected on the reproductive and swimming behaviors of marine fishes has been limited by the inability to remotely transmit these large datasets. Here, we present the first application of remotely transmitted acceleration data to predict spawning and discover drivers of high activity in a wild and highly migratory pelagic fish, the mahi-mahi (Coryphaena hippurus). Spawning events were...
Tipo: Text
Palavras-chave: Reproductive ecology; Pop-up satellite archival tag (PSAT); Pelagic; Spawning; Migration.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00683/79511/82225.pdf

CEAMARC, the Collaborative East Antarctic Marine Census for the Census of Antarctic Marine Life (IPY # 53): An overview
Provedor de dados: 5
Autores: Hosie, Graham; Koubbi, Philippe; Riddle, Martin; Ozouf-costaz, Catherine; Moteki, Masato; Fukuchi, Mitsuo; Ameziane, Nadia; Ishimaru, Takashi; Goffart, Anne.
The Census for Antarctic Marine Life (CAML, IPY Project 53) aimed to investigate the distribution and abundance of Antarctic marine biodiversity and how it will be affected by climate change. It was a major ship-based research programme in the austral summer of 2007-2008 involving scientists from 30 countries and 19 vessels. The Collaborative East Antarctic Marine Census (CEAMARC) was a multinational contribution to CAML involving scientists and students from several nations using three ships from Australia, Japan and France surveying the one area. This collaboration was a highly coordinated and comprehensive survey of the plankton, fish, benthos, oceanography and geophysical conditions of the waters north of Terre Adelie and George V Land of Eastern...
Tipo: Text
Palavras-chave: CEAMARC; CAML; Marine biodiversity; Pelagic; Benthos.
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00227/33827/32466.pdf

Technical mitigation measures for sharks and rays in fisheries   for tuna and tuna-like species: turning possibility into reality
Provedor de dados: 5
Autores: Poisson, Francois; Abascal Crespo, Francisco; Ellis, Jim R.; Chavance, Pierre; Pascal, Bach; Santos, Miguel. N.; Seret, Bernard; Korta, Maria; Coelho, Rui; Ariz, Javier; Murua, Hilario.
Tuna fisheries have been identified as one of the major threats to populations of other marine vertebrates, including sea turtles, sharks, seabirds and marine mammals. The development of technical mitigation measures (MM) in fisheries is part of the code of conduct for responsible fisheries. An in-depth analysis of the available literature regarding bycatch mitigation in tuna fisheries with special reference to elasmobranchs was undertaken. Studies highlighting promising MMs were reviewed for four tuna fisheries (longline, purse seine, driftnets and gillnet, and rod and line – including recreational fisheries). The advantages and disadvantages of different MMs are discussed and assessed based on current scientific knowledge. Current management measures for...
Tipo: Text
Palavras-chave: Mitigation; Elasmobranch; Bycatch; Pelagic; Mortality; Tuna regional fishery management organizations.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00364/47474/47493.pdf

Analyse des petits pelagiques, sardine et anchois, dans le golfe de Gascogne
Provedor de dados: 5
Autores: Coiffec, Gaelle; Duhamel, Erwan; Biseau, Alain; Danzart, Marc.
Since 1993 the yearly amounts of sardine landings for the Bay of Biscay fishing ports have experienced a constant increase (10,000 tonnes in 1993); on that account sardine is the first species landed in the fishing ports of the Bay of Biscay (15,000 tonnes in 2003). It is sold 0.54 € / kg (constant price over ten years) which means a 8,100 k€ turnover in 2003 and the 12th rank in value landed in the fishing ports of Bay of Biscay. Though anchovy landings have decreased over the last ten years, especially since 2001, this species occupies the 3rd rank of the highest landings (7,300 tonnes) of the Atlantic shoreline in 2003.The decrease of anchovy landings over the last ten years may account for the high increase of its constant sale price of 1.5 € / kg from...
Tipo: Text
Palavras-chave: Purse seiner; Midwater pair  trawler; Sardine; Anchovy; Pelagic; Bay of Biscay; Recrutement; Senneur; Chalutier pelagique; Bolincheur; Sardine; Anchois; Pelagique; Golge de Gascogne.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-2287.pdf

Competition or cooperation in transboundary fish stocks management: Insight from a dynamical model
Provedor de dados: 5
Autores: Nguyen-trong, Hieu; Brochier, Timothee; Auger, Pierre; Trinh, Viet Duoc; Brehmer, Patrice.
An idealized system of a shared fish stock associated with different exclusive economic zones (EEZ) is modelled. Parameters were estimated for the case of the small pelagic fisheries shared between Southern Morocco, Mauritania and the Senegambia. Two models of fishing effort distribution were explored. The first one considers independent national fisheries in each EEZ, with a cost per unit of fishing effort that depends on local fishery policy. The second one considers the case of a fully cooperative fishery performed by an international fleet freely moving across the borders. Both models are based on a set of six ordinary differential equations describing the time evolution of the fish biomass and the fishing effort. We take advantage of the two time...
Tipo: Text
Palavras-chave: Shared fish stock; Aggregation of variables; ODE; Pelagic; Fisheries management; West Africa.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00442/55310/72108.pdf

Ecosystem spatial structure revealed by integrated survey data
Provedor de dados: 5
Autores: Petitgas, Pierre; Huret, Martin; Dupuy, Christine; Spitz, Jerome; Authier, Matthieu; Romagnan, Jean-baptiste; Doray, Mathieu.
Integrated marine survey series such as PELGAS provide comprehensive geo-referenced data over large sea areas in major ecosystem components with defined biological resolution and spatio-temporal sampling scale. These data enable to develop product at different levels of biological organization and spatial scale that are useful for ecosystem integrated assessments. Using the PELGAS integrated data series, we applied a generic procedure made of several steps to identify and map ecologically coherent ecosystem spatial units in the Bay of Biscay. First, the data were interpolated on a common spatial grid and organized as a time series of matrices containing at each time the variables as columns and the grid cell values as rows. The multi-table analysis method...
Tipo: Text
Palavras-chave: Integrated surveys; Ecosystems; Spatial structure; Multi-factor analysis; Bay of Biscay; Pelagic.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00403/51402/51977.pdf

Detection of the elusive Dwarf sperm whale (     Kogia sima     ) using environmental DNA at Malpelo island (Eastern Pacific, Colombia)
Provedor de dados: 5
Autores: Juhel, Jean‐baptiste; Marques, Virginie; Polanco Fernández, Andrea; Borrero‐pérez, Giomar H.; Mutis Martinezguerra, Maria; Valentini, Alice; Dejean, Tony; Manel, Stéphanie; Loiseau, Nicolas; Velez, Laure; Hocdé, Régis; Letessier, Tom B.; Richards, Eilísh; Hadjadj, Florine; Bessudo, Sandra; Ladino, Felipe; Albouy, Camille; Mouillot, David; Pellissier, Loïc.
Monitoring large marine mammals is challenging due to their low abundances in general, an ability to move over large distances and wide geographical range sizes. The distribution of the pygmy (Kogia breviceps) and dwarf (Kogia sima) sperm whales is informed by relatively rare sightings, which does not permit accurate estimates of their distribution ranges. Hence, their conservation status has long remained Data Deficient (DD) in the Red list of the International Union for Conservation of Nature (IUCN), which prevent appropriate conservation measures. Environmental DNA (eDNA) metabarcoding uses DNA traces left by organisms in their environments to detect the presence of targeted taxon, and is here proved to be useful to increase our knowledge on the...
Tipo: Text
Palavras-chave: EDNA; Megafauna; Mobile species; Pelagic.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00683/79484/82076.pdf

A biosystematic basis for pelagic biodiversity
Provedor de dados: 16
Autores: Spoel, S. van der.
Biodiversity can be considered to be a human appreciation of the biological entity diversity. Diversity can be expressed numerically on the basis of taxa found, but it can also be expressed as the contribution of a specimen to the diversity, for which a formula is proposed. Diversity is the sum of the taxonomic or numerical diversity, and the ecological, genetical, historical, and phylogenetic diversity. Moreover, each group, or larger taxon, has its own characteristic diversity. These types of diversity are considered separately. One formula is tentatively proposed to calculate the overall diversity. Diversity in nature is variable, which is demonstrated in a diagram for comparison with societyinduced diversity changes. Diversity in the pelagic fluctuates...
Tipo: Article / Letter to the editor
Palavras-chave: Biodiversity; Diversity calculation; Ecology; Pelagic; Phylogeny.
Ano: 1994
URL: http://www.repository.naturalis.nl/record/504018

Reproduction of Brevoortia aurea (Spix &amp;amp; Agassiz, 1829) (Actinopterygii: Clupeidae) in the Mar Chiquita Coastal Lagoon, Buenos Aires, Argentina
Provedor de dados: 83
Autores: Lajud,Nicolás Agustín; Astarloa,Juan Martín Díaz de; González-Castro,Mariano.
ABSTRACT Reproductive biology of the Brazilian menhaden, Brevoortia aurea (Clupeiformes), was studied in Mar Chiquita Coastal Lagoon. Its abundance was analysed in relation to environmental variables, and the main biological-reproductive parameters were estimated: size at first maturity, batch and relative fecundity, frequency distribution of oocyte diameters and gonadosomatic index (GSI). Moreover, its reproductive cycle was analysed histologically. Samples were collected from May 2012 to April 2013. Once the spawning period was detected, extra samples were added (October and November 2013). The specimens were caught with gillnets, at a distance of 2,300 meters from the mouth of the lagoon. The highest abundances were observed in the months of October and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Clupeiformes; Multiple spawner; Pelagic; Reproduction.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000100222

Geographic distribution and description of four pelagic barnacles along the south east Pacific coast of Chile - a zoogeographical approximation
Provedor de dados: 97
Autores: HINOJOSA,IVÁN; BOLTAÑA,SEBASTIÁN; LANCELLOTTI,DOMINGO; MACAYA,ERASMO; UGALDE,PABLA; VALDIVIA,NELSON; VÁSQUEZ,NELSON; NEWMAN,WILLIAM A; THIEL,MARTIN.
The majority of zoogeographic studies along the Chilean Pacific coast have focused on benthic organisms and oceanographic conditions are considered the main factors influencing their distributions. Herein we examined the geographic distribution of pelagic barnacles of the family Lepadidae collected from floating macroalgae at seven sampling areas between 23 and 50° S. Four species were encountered and they are briefly described herein. The most abundant northern species was Lepas anatifera, and it diminished in abundance towards the south (33° S). Moreover, this species was not found in waters with a sea surface temperature (SST) of less than ~18 °C. Lepas australis, primarily a circumpolar West Wind Drift species, diminished in abundance towards the north...
Tipo: Journal article
Palavras-chave: Zoogeography; Lepas; Oceanography; Pelagic; Cirripedia.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2006000100002