Consulta: subjectFacets:"Migrations"
Registros recuperados: 28
Data/hora: 06/06/2024 09:21:49

Anchovies of the Sea of Azov and The Black Sea: Regularities of wintering migrations (Brief review)
Provedor de dados: 13
Autores: Shulman, G. E.
Close relation between internal (level of fat stores) and external (temperature fall) impulses of wintering migration of Azov and Black Sea anchovies Engraulis encrasicolus maeoticus and E. e. ponticus (“dosage principle”) was revealed. Schools with high fatness begin migration at more high temperature than that ones with low fatness. Intensity of migration also correlates with level of fatness. Regularities obtained may be used for study of wintering migration of other truly marine fishes.
Tipo: Journal Contribution
Palavras-chave: Anchovy; Migrations; Fat; Temperature; Анчоус; Миграции; Жир; Температура.
Ano: 2002
URL: http://repository.ibss.org.ua/dspace/handle/99011/143

Contribution a l'etude de la biologie du crabe-tourteau Cancer pagurus sur les cotes de Bretagne sud.
Provedor de dados: 5
Autores: Le Foll, Anne.
The study of the crab Cancer pagurus , along the Brittany coast, has revealed new information about its movements, growth and reproduction. The 1439 crab tagging has been effected either on land using the Edwards technique "suture-tag" or onboard using a similar technique to the Gundersen method of "toggle-tag". The results confirm that males are relatively sedentary, the females migrate more. To estimate growth, the author used the "capture-recapture" method and the results from crab rearing. It appeared that the molt increment is not constant and generally, so the molt frequency, it percentage decreases when the size increases.
Tipo: Text
Palavras-chave: Marine crustaceans; Sexual reproduction; Tagging; Growth; Migrations.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/publication-1785.pdf

Identification biogéographique des principaux stocks exploités en Manche, relations avec ceux des régions voisines
Provedor de dados: 5
Autores: Bennet, D; Casey, J; Dare, P; Dawson, W; Flatman, S; Hulme, T; Macer, C; Millner, R; Pickett, G; Vince, M; Lorance, Pascal; Souplet, A; Giret, M; Morin, Jocelyne; Berthou, A; Latrouite, Daniel; Morizur, Yvon; Bossy, S; Ozanne, S.
At present, the majority of fisheries are monitored and regulated in areas which are delineated by arbitrary ICES boundaries which do not necessarily have logical or consistent relationships with biological processes or fish movements. The biogeographical identification of Channel stocks is, therefore, an important step towards developing a rational strategy for the management of their fisheries. This synthesis is based on the wide available knowledge which has not been yet entirely exploited with the purpose of stock identification, for 25 commercially important species in the Channel. In addition, principal technics for stock identification are reviewed likewise environmental characteristics of the Channel, which represent fundamental components in...
Tipo: Text
Palavras-chave: Environnement physico chimique; Méthodes d'identification; Migrations; Zones de ponte; Distribution géographique; Espèces exploitées; Identité de stock; Manche; Physical environment; Identification methods; Migrations; Spawning areas; Geographical distribution; Exploited species; Stock identification; Channel.
Ano: 1993
URL: https://archimer.ifremer.fr/doc/1993/rapport-719.pdf

Do FADs influence the geographical distribution of dolphinfish (Coryphaena hippurus)?
Provedor de dados: 5
Autores: Taquet, Marc; Reynal, Lionel; Laurans, Martial.
For most fisheries, increasing the local production of pelagic fish is the main objective of Fish Aggregating Devices (fads). This does not rule out the existence of a larger-scale impact, especially on the migratory behaviour of fish. The analysis of data collected during 25 experimental fishing surveys around Martinique between 1995 and 1997 has led to the hypothesis that fads influence the migratory behaviour of young dolphinfish. Unlike recent studies of dolphinfish migration in the Caribbean, which tend to show an annual migration pattern with a seasonal passage through the French West Indies, the experimental fishing surveys done over more than a year on a monthly basis on a single cohort, show that the migratory pattern of part of the regional stock...
Tipo: Text
Palavras-chave: Attracting techniques; Geographical distribution; Migrations; Migratory species; Pelagic fisheries; Tuna fisheries; Coryphaena hippurus.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00042/15321/12635.pdf

Donnees nouvelles sur le germon Thunnus alalunga Bonnaterre 1788 dans le Nord-Est Atlantic. 2eme partie. Les populations de germons Thunnus alalunga dans le Nord-Est Atlantique.
Provedor de dados: 5
Autores: Aloncle, Henri; Delaporte, Francis.
In this, the 2nd part of a study of Thunnus alalunga in the north-east Atlantic, populations and migrations are considered. The term 'population' is defined. The utilization of H. fusca as a biological 'marker' is considered and tagging experiments are described. Modal classes are examined: summary analysis, detailed analysis of fisheries. Internal temps and regulation are studied. The types of watering are defined and described and a statistical analysis as a function of the watering is made. An attempt at synthesis is made: Azorian, standard. Migratory determinism is examined.
Tipo: Text
Palavras-chave: ANE; Thunnus alalunga; Population structure; Tagging; Migrations; Ecological distribution.
Ano: 1974
URL: http://archimer.ifremer.fr/doc/1974/publication-2043.pdf

La biologie de la lamproie marine (Petromyzon marinus Linne 1758) de la côte atlantique française
Provedor de dados: 5
Autores: Grellier, Patrick.
Vertebrate Cyclostome, the european sea lamprey is a sea spawning migrator amphihaline species, which is a parasite during its growing phase at sea. After the spawning migration, lampreys couple in the upper reach of water courses, they lay their eggs, then die from physiological misery. The eggs develop sheltered into a nest until hatching of small larvae, the ammocoetes. Morphologically very different from the adults, the ammocoetes spend a several years sedentary life, being burried into the sediment. Then, they metamorphose into young lampreys which undertake their downstream migration. As soon as they enter sea water, they continue growing at the expense of several species of fishes.
Tipo: Text
Palavras-chave: Morphologie; Cycle Biologique; Migrations; Reproduction.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00085/19616/17256.pdf

Role of steroid hormones and external factors in the control of pituitary gonadotropic activity of female European eel (Anguilla anguilla ).
Provedor de dados: 5
Autores: Leloup, H; Fontaine, Y; Dufour, S; Querat, B.
Gonadotropic activity is relatively low in the female freshwater (FW) eel (A. anguilla ): pituitary GTH was about 15 ng equivalent cGTH/mg fresh tissue. Plasma GTH was always less than 1 ng equivalent cGTH/ml and often undetectable (&lt; 0.2 ng equivalent cGTH/ml). Ovarian steroidogenesis in FW fish is similarly low; plasma concentration of both free testosterone (T) and free estradiol (E sub(2)) were less than 0.3 ng/ml as measured by RIA. Treatment with E sub(2) in FW fish caused a great increase in pituitary GTH, up to 1000 times control values, without changing plasma GTH. Stimulation of gonadotropic activity and ovarian development occur during the eel's migration to the Sargasso Sea. Adaptation to seawater (SW) caused a great increase of plasma E...
Tipo: Text
Palavras-chave: Anguilla anguilla; Anguillidae; Pisces; Migrations; Salinity; Environmental factors; Pituitary gland; Sexual reproduction; Ovaries; Sexual maturity; Steroids; Sex hormones; Facteurs externes; Steroids sexuels; Gonadotropine; Anguille.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1217.pdf

Tagging Atlantic bluefin tuna from a Mediterranean spawning ground using a purse seiner
Provedor de dados: 5
Autores: Rouyer, Tristan; Bonhommeau, Sylvain; Giordano, Nicolas; Giordano, François; Ellul, Saviour; Ellul, Giovanni; Deguara, Simeon; Wendling, Bertrand; Bernard, Serge; Kerzerho, Vincent.
Atlantic bluefin tuna, Thunnus thynnus, is as an emblematic and commercially valuable large pelagic species. In the past ten years, the purse seine fishery in the Mediterranean represents more than 50 % of the catch. Nowadays, purse seines target large fish and operate during the spawning season in the spawning grounds. Electronic tagging has shed a considerable amount of light on the ecology and behaviour of bluefin tuna over the past twenty years. However, such technique has rarely been applied on large bluefin tunas caught by the Mediterranean purse seine fishery despite its major importance. The logistical constraints related to this specific fishery, combined with the timing of migration of the fish and the requirements related to the handling of big...
Tipo: Text
Palavras-chave: Large Atlantic bluefin tuna; Eastern Atlantic and Mediterranean stock; Electronic tagging; Purse seine; Migrations.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00607/71876/70622.pdf

Phytotherapies in motion: French Guiana as a case study for cross-cultural ethnobotanical hybridization
Provedor de dados: 5
Autores: Tareau, M.-a.; Bonnefond, A.; Palisse, M.; Odonne, G.
Background French Guiana is characterized by a very multicultural population, made up of formerly settled groups (Amerindians, Maroons, Creoles) and more recent migrants (mostly from Latin America and the Caribbean). It is the ideal place to try to understand the influence of intercultural exchanges on the composition of medicinal floras and the evolution of phytotherapies under the effect of cross-culturalism. Methods A combination of qualitative and quantitative methods was used. Semi-directive interviews were conducted in 12 localities of French Guiana’s coast between January 2016 and June 2017, and the responses to all closed questions collected during the survey were computerized in an Excel spreadsheet to facilitate quantitative processing. Herbarium...
Tipo: Text
Palavras-chave: Cultural keystone species; Indicator species; Exchange networks; Migrations.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00652/76384/77395.pdf

Migrations, admixture and genetic diversity in Central Argentinian Patagonia: analysis of autosomal Alu polymorphisms
Provedor de dados: 46
Autores: Parolin,M.L; Zanetti,D; Calò,C.M; Esteban,E; Avena,S; Carnese,F.R; Moral,P.
This study aimed to analyze autosomal Alu insertions in three localities from Patagonia Argentina belonging to the Andes region and the coast of the Chubut province. Knowledge of the genetic diversity of these populations, along with the genealogical data, will contribute to better understand historical information, differential migration process and bio-demographic composition of the Central Patagonia region. In order to achieve this objective, 16 autosomal Alu insertion polymorphisms were genotyped: ACE, APO-A1, TPA25, FXIIIB, A25, HS4.32, D1, HS4.69, HS2.43, Sb19.12, Yb8NBC120, Sb19.3, Yb8NBC125, Ya5NBC221, DM, and CD4. Our results showed that the Central Patagonia region presents a complex continental genetic admixture with marked Native American roots...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alu insertion polymorphisms; Argentina Central Patagonia; Admixture; Migrations.
Ano: 2017
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332017000300004

Rapport national sur l'état de l'environnement marin et côtier
Provedor de dados: 20
Le domaine maritime sénégalais s’étend de 18°00 N, -20°00 W, -16°30 E, 12°15 S ; la presqu’île du Cap-Vert située entre 14°30 N et 15°00 N le divise en deux zones aux caractéristiques topographiques distinctes. Au nord, le plateau continental est peu étendu vers le large et orienté Nord-Nord/Est. Au sud de la presqu’île, le plateau s’élargit et le talus continental est orienté nord-sud. L’embouchure du fleuve Sénégal au Sénégal au Nord de la presqu’île du Cap-Vert et celles de la Gambie et de la Casamance au Sud constituent également un trait marquant de cette région. Les travaux réalisés au Sénégal en océanographie ont montré : - l’existence de deux saisons marines aux caractéristiques très différentes qui se succèdent : une saison chaude de juillet à...
Tipo: Report
Palavras-chave: Deltas; Ecosystems; Mangroves; Coastal erosion; Marine environment; Marine mammals; Shark fisheries; Turtle fisheries; Aquatic birds; Fishermen; Migrations; Flora; Fisheries; Marine pollution; Fishing nets; Climatic changes; Deltas; Ecosystems; Marine environment; Aquatic birds; Fishermen; Fisheries; Mangroves; Coastal erosion; Flora; Fishing nets; Http://aims.fao.org/aos/agrovoc/c_2170; Http://aims.fao.org/aos/agrovoc/c_2482; Http://aims.fao.org/aos/agrovoc/c_4610; Http://aims.fao.org/aos/agrovoc/c_8898; Http://aims.fao.org/aos/agrovoc/c_2936; Http://aims.fao.org/aos/agrovoc/c_2934; Http://aims.fao.org/aos/agrovoc/c_16190; Http://aims.fao.org/aos/agrovoc/c_9949; Http://aims.fao.org/aos/agrovoc/c_2983; Http://aims.fao.org/aos/agrovoc/c_2951.
Ano: 1922
URL: http://hdl.handle.net/1834/2884

Rapport national sur l'état de l'environnement marin et côtier
Provedor de dados: 20
Le domaine maritime sénégalais s’étend de 18°00 N, -20°00 W, -16°30 E, 12°15 S ; la presqu’île du Cap-Vert située entre 14°30 N et 15°00 N le divise en deux zones aux caractéristiques topographiques distinctes. Au nord, le plateau continental est peu étendu vers le large et orienté Nord-Nord/Est. Au sud de la presqu’île, le plateau s’élargit et le talus continental est orienté nord-sud. L’embouchure du fleuve Sénégal au Sénégal au Nord de la presqu’île du Cap-Vert et celles de la Gambie et de la Casamance au Sud constituent également un trait marquant de cette région. Les travaux réalisés au Sénégal en océanographie ont montré : - l’existence de deux saisons marines aux caractéristiques très différentes qui se succèdent : une saison chaude de juillet à...
Tipo: Report
Palavras-chave: Deltas; Ecosystems; Mangroves; Coastal erosion; Marine environment; Marine mammals; Shark fisheries; Turtle fisheries; Aquatic birds; Fishermen; Migrations; Flora; Fisheries; Marine pollution; Fishing nets; Climatic changes; Deltas; Ecosystems; Marine environment; Aquatic birds; Fishermen; Fisheries; Mangroves; Coastal erosion; Flora; Fishing nets.
Ano: 2002
URL: http://hdl.handle.net/1834/2884

Eléments sur la pêche artisanale mauritanienne
Provedor de dados: 20
Autores: Chaboud, C.; Kébé, M.; Diop, H.; Lawal, H.S.
Le Centre National de Recherches Oceanographiques et des Pêches de Nouadhibou (CNROP) entreprend chaque semestre un recensement exhaustif des unités de pêche artisanale opérant sur le littoral mauritanien. En juillet 1987 une enquête socio- 6conomique a été effectuée. Les informations recueillies portent sur les pirogues en état de prendre la mer, les migrations de pêcheurs, l'emploi et l'activité au cours des trois derniers mois,le capital technique, les équipages et l'organisation sociogconomique des unités de pêche. La pêche artisanale mauritanienne compte actuellement 735 embarcations réparties sur 22 points de débarquement. Elle génère 3302 emplois directs.
Tipo: Journal Contribution
Palavras-chave: Artisanal fishing; Migrations.
Ano: 1988
URL: http://hdl.handle.net/1834/4672

Migrants ouest-africains: miséreux, aventuriers ou notables ?
Provedor de dados: 20
Autores: Sall, A.; Morand, P.
CERI-Sciences Po-CNRS, Paris (France); Centre d'Etudes d'Afrique, Bordeaux (France); Centre d' Etudes des Mondes Africains, Paris (France)
Tipo: Journal Contribution
Palavras-chave: Artisanal fishing; Migrations; Fishermen; Canoe fisheries; Fishermen; Http://aims.fao.org/aos/agrovoc/c_2936.
Ano: 2008
URL: http://hdl.handle.net/1834/3673

Sur la présence de la phanérogame marine &lt;Halophila stipulacea&gt; (Forsskål) dans le golfe de Gabes
Provedor de dados: 20
Autores: Mahjoub, S.; Missaoui, H.; Chalghaf, M.
حول ظهور النبات الزهري البحري &lt;Halophila stipulacea&gt;   في خليج قابس  : تمثل هذه الدراسة أول إشارة لظهور النبات الزهري البحري &lt;Halophila stipulacea&gt; في المياه التونسية. وقعت ملاحظة هذه النبتة البحرية بكثافة كبرى في شباك الصيد الساحلي بميناء صفا قس. بعد استجواب عدد هام من البحارة، تبين أن هذا النوع الحديث الاستيطان يعيش في أعماق موحلة بين 3 و 7 أمتار
Tipo: Journal Contribution
Palavras-chave: Geographical distribution; Migrations; New records; Sea grass; Geographical distribution; Http://aims.fao.org/aos/agrovoc/c_5083.
Ano: 2003
URL: http://hdl.handle.net/1834/1128

Bio-écologie des cétacés et enjeux de leur conservation pour les Etats côtiers africains comme le Sénégal
Provedor de dados: 20
Autores: Ndao, Ibrahima.
Tipo: Theses and Dissertations
Palavras-chave: Whaling; Anatomy; Morphology (biology); Physiology (fish); Preservation (fishery products); Biodiversity; Baleens; Migrations; Reproductive cycle; Fish consumption; Overfishing; Pollution.
Ano: 2006
URL: http://hdl.handle.net/1834/5005

Institutions, mobility and resilience in the Fante migratory fisheries of West Africa
Provedor de dados: 20
Autores: Overå, R.
Through their spatial mobility, African fishermen and fish traders explore and exploit new niches: primarily fishing grounds and fish markets (see Chauveau 1991). Ghanaian canoe fishermen are among the groups most famous for such activity. In the twentieth century, they migrated extensively in coastal West Africa, reaching as far as Mauritania to the north and Congo to the south in order to fish in areas where the local fishermen have under-exploited their fishing grounds, and markets are unsaturated with fish (Delauney 1991; Boujou 2000). These migrants’ contributions in their host countries in terms of technological innovation in the fisheries, in terms of new knowledge and institutions, and not the least in terms of food supply, are increasingly being...
Tipo: Conference Material
Palavras-chave: Migrations; Artisanal fishing.
Ano: 2001
URL: http://hdl.handle.net/1834/655

Réseaux et groupes d'appartenance chez les pêcheurs migrants : le cas des wolofs de n'diago (Mauritanie)
Provedor de dados: 20
Autores: Dia, A.D.
L'article situe les conditions historiques d'émergence du phénomène migratoire chez les Wolof de N'Diago et de son autonomisation vis-à-vis de des pêcheurs de Guet-N'dar (Saint-Louis) du Sénégal. Il traite des différents réseaux et groupes d'appartenance qui constituent des lieux et modes d'affirmation et d'expression des processus identitaires manipulés à des fins stratégiques d'accès aux ressources de la pêche. Par ailleurs, les phénomènes d’identification à un espace géographique institutionnel sont éclairé à partir d'une approche conceptuelle, bilatéralité des références. Ce qui permet de saisir les conditions particulières des activités de pêches pratiquées dans un contexte de migration et les conséquences de ces migrations sur la différenciation...
Tipo: Journal Contribution
Palavras-chave: Identité; N'diago; Nouadhibou; Pêche; Groupes d’appartenance; Fishing; Identity; Wolof; Mauritanie; Pêcheurs; Migration; Social grouping; Bilateral references; Mauritanie; Fishermen; Migration; Bilatéralité des références; Fishermen; Migrations; Bilateral aid.
Ano: 2001
URL: http://hdl.handle.net/1834/213

Some observations on the African catfish Clarias gariepinus (Burchell) in the Sondu-Miriu River of Lake Victoria, Kenya
Provedor de dados: 20
Autores: Lung'ayia, H.B.O.
The African catfish Clarias gariepinus (Burchell), has an intermitent     occurrence in the Sondu-Miriu river draining into lake Victoria.     Observations were made to get basic information on size composition,     migration, spawning period and food of this species in the river. A     total of 376 fish samples of fish ranging from 11.9 to 101.1 cm in     total length were examined from January to December 1989. A migration     of the fish between the lake and the river waters is indicated. Small     sized and immature fish were available in the river throughout the     year but their numbers became minimal in the dry season. Large and     mature specimens were caught mainly during the high water mark and     rainy seasons of April-June and...
Tipo: Proceedings Paper
Palavras-chave: Clarias gariepinus; Migrations; Population structure; Size distribution; Spawning; Population structure; Spawning; Freshwater catfish; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_14490; Http://aims.fao.org/aos/agrovoc/c_3103.
Ano: 1994
URL: http://hdl.handle.net/1834/1159

Algunas características de la estructura y del comportamiento migratorio de los cardúmenes de caballa (Scomber japonicus marplatensis)en la plataforma bonaerense (Mar Argentino); período 1965-1984
Provedor de dados: 20
Autores: Cousseau, M.B.; Angelescu, V.A.; Perrotta, R.G.
Three periods were distinguished during the analyzed years: the first one (1965-1975)may be defined as "normal fishing seasons" occurring from October to March, with catches between 8,000 and 14,000 tons.
Tipo: Journal Contribution
Palavras-chave: Size distribution; Reproduction; Sexual maturity; Feeding; Landing statistics; Migrations; Geographical distribution; Feeding; Geographical distribution; Reproduction; Sexual maturity; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_7016.
Ano: 1987
URL: http://hdl.handle.net/1834/2008

Estudio comparativo de los pejerreyes marinos del área marplatense
Provedor de dados: 20
Autores: Hirt Chabbert, J.A.
Los pejerreyes son peces muy apreciados por el hombre, debido a la exquisitez de su carne. Habitan tanto las aguas dulces y salobres como las marinas. La gran semejanza entre todos ellos y su adaptabilidad a los diversos medios, son factores que hacen muy dificil la identificación específica. La mayoría de los ictiólogos que se han ocupado hasta ahora del tema en la Argentina, no han publicado los resultados de sus investigaciones, por 10 cual se cuenta con unos pocos trabajos antiguos (Berg, 1895; Devicenzi, 1924; Lahille 1929a, 1929b y 1930; Marrero, 1950) y claves recientes elaboradas sobre los datos provenientes de esos trabajos (Menni et al., 1984). Uno de los trabajos más nuevos y completos sobre las especies de aterinidos (Familia Atherinidae) del...
Tipo: Theses and Dissertations
Palavras-chave: Marine fish; Taxonomy; Animal morphology; Migrations; Geographical distribution; Taxonomy; Geographical distribution; Animal morphology; Http://aims.fao.org/aos/agrovoc/c_7631; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_421.
Ano: 1991
URL: http://hdl.handle.net/1834/2953

Teoría sobre las migraciones de los peces de pico (II)
Provedor de dados: 20
Autores: Olaechea-Juárez, A.; Sosa-Blanco, M.
En la región noroccidental se puede capturar el emperador durante todo el año, aunque con mayores rendimientos durante los meses de febrero y marzo en los cuales transitan hacia Canadá. Abril y mayo  la aguja blanca. En julio y agosto la del castero. Se muestra a través de mapa las zonas de mayor concentración, así como las rutas de las migraciones problables.
Tipo: Journal Contribution
Palavras-chave: Migrations; Fishes.
Ano: 1987
URL: http://hdl.handle.net/1834/4597

Etude diagnostic de la pêcherie de mulets sur la grande côte du Sénégal
Provedor de dados: 20
Tipo: Book
Palavras-chave: Mullet fisheries; Reproduction; Growth; Migrations; Ecology; Stocks; Landing statistics; Inland fisheries; Fishing gear; Exploitation; Canoe fisheries; Marketing; Artisanal fishing; Fishing licenses; Mesh regulations; Protected areas; Reef fisheries; Fishing effort.
Ano: 2009
URL: http://hdl.handle.net/1834/4578

Cinco nuevos registros de especies de aves para la isla Malpelo, Pacífico colombiano
Provedor de dados: 20
Autores: Zamudio, Jeisson Andrés.
Five species of birds were recorded for the first time in Malpelo Island. With this information, the total number of birds recorded in the island ascends to 65 species. The new bird records are Upland Sandpiper, Semipalmated Sandpiper, Surfbird, Great Crested Flycatcher and the Northern Waterthrush.
Tipo: Journal Contribution
Palavras-chave: Migrations; Marine birds; New records.
Ano: 2011
URL: http://hdl.handle.net/1834/4425

El dorado, Salminus maxillosus (Pisces, Characiformes)en el Río de la Plata y Río Uruguay inferior
Provedor de dados: 20
Autores: Sverlij, S.B.; Espinach Ros, A.
Catch per unit effort (CPUE), lenght distribution, age, growth, reproduction, migrations and feeding were studies through samples collected with longlines and a gang of gill-nets of several mesh size. CPUE data showed a progressive decrease of the relative abundance in the Río de la Plata, during the study period. Age was studied from scales. Back-calculations of growth revealed the pressence of Lee's phenomenon. Means lenghts at age were greater in females. No significant difference was found in lenght-weight regressions from both sexes and sampling areas. Only young individuals from 1 to 6 years were caught. None of the fish studied had ripening gonads. Extensive migrations were recorded both in the Paraná and Uruguay rivers. Stomach contents analysis...
Tipo: Journal Contribution
Palavras-chave: Migrations; Catch/effort; Sex ratio; Size distribution; Scale reading; Growth curves; Reproduction; Stomach content; Sex ratio; Reproduction; Http://aims.fao.org/aos/agrovoc/c_7014; Http://aims.fao.org/aos/agrovoc/c_6507.
Ano: 1986
URL: http://hdl.handle.net/1834/2032

Teoría sobre las migraciones de los peces de pico (I)
Provedor de dados: 20
Autores: Olaechea-Juárez, A.; Sosa-Blanco, M.
Las migraciones de estas especies resultan muy complejas y en ocasiones no participan todos los individuos. Están influenciadas por las condiciones ambientales imperantes (corrientes marinas, temperatura de las aguas, etc.) Se muestra el esquema de la probable migración del castero y del emperador en el Atlántico centrooccidental.
Tipo: Journal Contribution
Palavras-chave: Migrations; Fishes.
Ano: 1987
URL: http://hdl.handle.net/1834/4600

Aspectos biológicos del calamar Illex argentinus
Provedor de dados: 20
Autores: Leta, H.R.
La creciente importancia que los recursos de calamar han adquirido en 105 últimos 30 años, los sitúa actualmente entre los más importantes recursos pesqueros del mundo. En consecuencia, paises tradicionalmente no explotadores o consumidores de productos de calamar, han orientado sus esfuerzos hacia el logro de un mejor conocimiento de las especies de cefalópodos que habitan su ambiente marino. En este sentido el aporte de disciplinas tales como la biología ha sido decisivo para desarrollar en forma exitosa pesquerías de calamar, entre otras.El programa de investigaciones del Instituto Nacional de Pesca para 1980 incluyó el estudio integral de la explotación de los calamares como un primer paso hacia el desarrollo de una pesquería del recurso.  Este trabajo...
Tipo: Report
Palavras-chave: Biology; Environmental conditions; Population structure; Spawning; Spawning grounds; Sex ratio; Sexual maturity; Reproduction; Length; Behaviour; Migrations; Growth; Population structure; Spawning; Length; Growth; Biology; Environmental conditions; Spawning grounds; Sex ratio; Sexual maturity; Reproduction; Behaviour; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_14490; Http://aims.fao.org/aos/agrovoc/c_4260; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_925; Http://aims.fao.org/aos/agrovoc/c_32980; Http://aims.fao.org/aos/agrovoc/c_7277; Http://aims.fao.org/aos/agrovoc/c_7014; Http://aims.fao.org/aos/agrovoc/c_7016; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_868.
Ano: 1981
URL: http://hdl.handle.net/1834/2563

Ecología trófica de la anchoíta (Engraulidae, Engraulis anchoita)del Mar Argentino. Parte III. Requerimiento trófico individual en relación con el crecimiento, ciclo sexual y las migraciones estacionales
Provedor de dados: 20
Autores: Angelescu, V.A.; Anganuzzi, A.
The paper was developed in order to arrange the data gathered on this subject and to generate new hypotheses in connection with the trophic strategy of the northern stock of anchovy in the area between latitudes 35°-42°S. Such estimates were finally compared with the values of the gravimetric determinations of stomach contents- as converted to caloric values - of individuals grouped by total-length amd age classes, ecological areas, and seasons of the year. The set of results as obtained conforms the initial basis for developing Part IV of the Trophic Ecology of the Argentine anchovy as related to food consumption estimates, by stock biomass and annual classes, with back-calculations to age class 0, and for applying "regional patterns" that result from the...
Tipo: Journal Contribution
Palavras-chave: Growth curves; Bioenergetics; Migrations; Length-weight relationships; Condition factor.
Ano: 1986
URL: http://hdl.handle.net/1834/2022