Consulta: subjectFacets:"Age determination"
Registros recuperados: 27
Data/hora: 11/06/2024 10:02:03

Manual of Fish Sclerochronology
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Panfili, Jacques; De Pontual, Helene; Troadec, Herve; Wrigh, Peter J.
Sclerochronology, the study of calcified structures to reconstruct the past history of living organisms, is central to fish biology and fisheries management. This manual aims to provide an overview of the current theoretical and practical aspects of sclerochronological studies. By providing information on the nature of calcified structures (otoliths, scales, skeleton), their uses in fish research and methods for preparation and examination, the manual constitutes a comprehensive guide for researchers, technicians and students either new to the field or interested in expanding their range of expertise. The enclosed multimedia version (DVD) is supplemented by videos illustrating the main technical procedures with an alternative navigation mode based on...
Tipo: Text
Palavras-chave: Age; Age determination; Biological aging; Chemistry; Growth; Otolith reading; Otoliths; Scale reading; Scales; Skeleton.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00017/12801/9742.pdf

Une technique de lecture d'age des raies
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Du Buit, M; Maheux, F.
Description of a technique for including and preparing small cross sections of ray vertebra. The observation of the rings growth is performed after staining with cobalt nitrate and safranine. This method is applied to the observation of the growth rings in the vertebra of Raja naevus.
Tipo: Text
Palavras-chave: Raja naevus; Staining; Growth; Vertebrae; Age determination.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/publication-1792.pdf

Les Sars Deplodus sargus (Linne 1758) du Golfe du Lion: croissance et caracteristiques des debarquements aux criees de Sete et du Grau-du-Roi.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Man-wai, Rabenevanana; Quignard, Jean-pierre.
Age and growth of seabream D. sargus in the Gulf of Lions (Mediterranean Sea) were examined using scale reading. Growth was expressed by the von Bertalanffy's equation based on the estimation of total lengths at the time of annual ring formation. The growth in weight and the length-weight relationship were calculated for both sexes separately and combined during and after spawning periods. Preliminary investigations on the characteristics of commercial catches (from Sete and Grau-du-Roi commercial fishing grounds) were also carried out.
Tipo: Text
Palavras-chave: Diplodus sargus; Sparidae; Pisces; Fishing grounds; Spawning; Fishery biology; Age determination; Fish catch statistics; Length weight relationships; Scale reading; Growth.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/publication-1845.pdf

Etude de la croissance des baudroies, Lophius piscatorius et L.budegassa , de l'Atlantique nord-est obtenue a partir de l'illicium.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dupouy, Herve; Pajot, Régis; Kergoat, Bernard.
The growth in length of the two European anglerfishes (Lophius piscatorius and L. budegassa ) was studied from samples collected in ICES areas VII and VIII during 1984. Because of the difficulty on otoliths reading, a method based on illicium sections was developed. Moreover, morphological features of the sections can be useful in separating the two species. The location of winter rings was measured; length-frequency analysis and backcalculation was used as a first attempt to validate direct ageing.
Tipo: Text
Palavras-chave: Lophius budegassa; Lophius piscatorius; Length weight relationships; Age determination; Growth.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/publication-1794.pdf

New record of a stranded sperm whale (Physeter macrocephalus) and a review of strandings along the continental Argentine coast
Provedor de dados: Mastozoología Neotropical
Autores: Degrati,Mariana; García,Néstor A.; Grandi,M. Florencia; Leonardi,M. Soledad; Loizaga de Castro,Rocío; Vales,Damián G.; Dans,Silvana L.; Pedraza,Susana N.; Crespo,Enrique A.
We present a new record of sperm whale with notes on diet, age determination and a review of strandings along the continental Argentine coast. A complete necropsy was made in the field, and morphometric data were taken. The specimen stranded was a mature male of 64+ years old. This is the oldest specimen determined for a sperm whale in the Southwest Atlantic coast. In the stomach contents a total of 302 cephalopod lower beaks were recovered. Cestodes were present in the blubber but parasites were not found in stomach and intestine contents.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age determination; Continental Argentine coast; Sperm whale; Stranding.
Ano: 2011
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832011000200013

Growth of the skull of the Harbour Porpoise, Phocoena Phocoena (Linnaeus, 1758), in the North Sea, after age determination based on dentinal growth layer groups
Provedor de dados: Naturalis Digital Academic Repository
Autores: Noldus, L.P.J.J.; Klerk, R.J.J. De.
This study of the Harbour Porpoise Phocoena phocoena (Linnaeus, 1758) has been undertaken in order to find out whether differences in size and growth rate between the skulls of males and females could be demonstrated. Stuart &amp; Morejohn (1980) have established this phenomenon in the population of the north-eastern Pacific. The material on which this study is based, consists of 76 skulls present in the collection of the Rijksmuseum van Natuurlijke Historie (RMNH), Leiden. They all belong to specimens stranded on the Dutch coast. In order to determine the age, of all these specimens the number of dentinal growth layer groups (GLG) in the teeth was counted. Thereupon 32 cranial characters were measured of each skull; these measurements were plotted against...
Tipo: Article / Letter to the editor
Palavras-chave: Mammalia; Cetacea; Phocoenidae; Phocoena phocoena; North Sea; Skull; Growth; Teeth; Age determination; 42.84.
Ano: 1984
URL: http://www.repository.naturalis.nl/record/319036

Estudio preliminar de la edad, el crecimiento, área de distribución y pesca de la corvina negra, Pogonias cromis, en el litoral de la provincia de Buenos Aires.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Urteaga, J.R.; Perrotta, R.G.
Argentine black drum distributes mainly in shallow waters associated to estuarine areas, particularly to  Samborombon Bay where it may be detected throughout the year. Nevertheless, it can also be spotted more southwards (40°S) and at deeper waters. During summer, catches of the species in Samborombon Bay are practically negligible, probably due to movements towards shallow waters out of reach of the inshore commercial  fleet. Landings increase in autumn and show peak values in winter, coinciding with the fishing season of whitemouth croaker, Micropogonias furnieri, whose geographical distribution within the bay overlaps that of  black drum. As of 1995, landings of black drum showed increasing trends both in Argentina and Uruguay. These increments coincide...
Tipo: Journal Contribution
Palavras-chave: Age determination; Growth; Landing statistics; Geographical distribution; Fishery management; Coastal fisheries; Growth; Age determination; Geographical distribution; Fishery management; Coastal fisheries; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_24110; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_1696.
Ano: 2001
URL: http://hdl.handle.net/1834/2593

Estudio de la edad y crecimiento del recurso merluza común (Merluccius hubbsi) durante el período 1968-1970; determinación de las fluctuaciones del recurso
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Villarino, M.F.
La merluza común (Merluccius hubbsi) es uno de los más importantes recursos pesqueros del Mar Argentino. Constituye aproximadamente el 68 por ciento de las capturas desembarcadas, según lo indicado por las estadísticas oficiales (Boletín Oficial, Subsecretaría de Pesca, 1988). Su explotación ha mantenido una tendencia creciente a partir de 1974, como consecuencia del incremento de las capturas de Argentina y el plan de desarrollo pesquero implementado por Uruguay. Las capturas de 1978 y 1979 superaron ampliamente el valor del rendimiento máximo sostenible, estimado en 344.000 toneladas (Verazay y Otero, 1986), y se mantienen próximas al mismo a partir del último año mencionado.Como resultado de esta explotación el recurso pesquero se redujo aproximadamente...
Tipo: Theses and Dissertations
Palavras-chave: Age determination; Otoliths; Growth.
Ano: 1990
URL: http://hdl.handle.net/1834/5027

Estudio de edad y crecimiento de la raya hocicuda Dipturus chilensis (Guichenot,1848) en el Atlántico Sudoccidental (34º -55º LS y 52º -69º LW)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Zavatteri, A.
This paper deals with the age and growth parameters of the Southwest Atlantic beaked skate Dipturus chilensis, as well as with some reproductive features of the species. Samples of individuals inhabiting 34°-55°S and 52°- 69°W were analyzed. They were taken during surveys carried out by the National Institute for Fisheries Research and Development (INIDEP) research vessels, as well as by a landing sampling at Mar del Plata port. The fish age was determined by counting growth rings from thin sections of the vertebral centra of 414 fish ranging 24-110 cm (203 males) and 24-115 cm (211 females) total length. The vertebral sections were stained using cobalt  hloride. Both average per cent error (APE=5.94) and precision (D=5.89) indexes suggested that the...
Tipo: Theses and Dissertations
Palavras-chave: Age; Age determination; Growth; Length-weight relationships; Sexual maturity; Age determination; Growth; Age; Sexual maturity; Http://aims.fao.org/aos/agrovoc/c_24110; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_186; Http://aims.fao.org/aos/agrovoc/c_7016.
Ano: 2010
URL: http://hdl.handle.net/1834/3585

La croissance du rouget rouge (Mullus surmuletus, l, 1758)  dans le golfe de Gabès
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Jabeur, Ch.; Missaoui, H.; Gharbi, H.; El Abed, A.
L’étude de la croissance du rouget de roche Mullus surmuletus dans le golfe de Gabès, basée sur la lecture de 478 otolithes d’individus provenant essentiellement de la pêche côtière et partiellement du chalutage benthique , a permis d’estimer les paramètres de croissance de cette espèce selon le modèle de Von Bertalanffy. La clé âge-longueur a été établie et les courbes de croissance en longueur et pondérale ont été tracées séparément pour les mâles, les femelles et sexes confondus. Sans différenciation de sexe, la longueur asymptotique est estimée à 223 mm, le coefficient K à 0.344 an -1 et l’âge théorique T0 à –0.79. Les relations Longueur-Poids ont été également établies séparément pour les mâles et les femelles. Dans la gamme des tailles étudiées, la...
Tipo: Journal Contribution
Palavras-chave: Otolith reading; Growth; Age determination; Mullet fisheries; Mullus surmuletus; Http://aims.fao.org/aos/agrovoc/c_43348.
Ano: 2000
URL: http://hdl.handle.net/1834/4295

Lectura de edades en otolitos de peces teleosteos
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Leta, Héctor R.; Keim, Albert.
In general, the increased exploitation of the natural organic resources of the world makes it more and more necessary to apply proper resource management procedures in order to avoid overexploitation. In the fisheries field, the managemente is, among other things often based on studies of fish ageing. Such studies have become an important tool, to be used in the elaboration of population dynamic models and of biological parameters like stock recruitment, growth and mortality. In age studies the otoliths and scales of the fish are of basic importance. The reason is that they reflect th occurrence of the biological changes, which take place in the fish during its lifespan. Such changes may derive from for instance the natural growth process of the fish or...
Tipo: Report
Palavras-chave: Otoliths; Marine fish; Age determination; Otolith reading.
Ano: 1982
URL: http://hdl.handle.net/1834/4911

Estudio de algunos aspectos del ciclo vital de la merluza de cola Macruronus magellanicus, Lonnberg, 1907.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Giussi, A.R.
Long tailed hake Macruronus magellanicus, is a demersal fish,distributed in the SW Atlantic Ocean, in Malvinas Current waters,from 36° and 55°S, mainly between 50m and 200m depth. The species is also distributed in Chilenian waters in the Pacific Ocean, being caught in the Magellan Strait and the Beagle Channel. Age determination was estimated with the sagittae otoliths, in which only one ring is formed during the year. Growth parameters were calculated directly and with back calculated methodology, no differences were observed between the results. Differences in growth sexes were evident from 3 years old. The oldest age observed was 13. Different distributional areas of adults through out the year could suggest a migratory movement in northern waters of...
Tipo: Theses and Dissertations
Palavras-chave: Life cycle; Growth; Otoliths; Age determination; Reproduction; Population dynamics; Mortality; Population structure; Fishery surveys; Fishing grounds; Geographical distribution; Back calculation; Growth; Otoliths; Age determination; Population structure; Geographical distribution; Life cycle; Reproduction; Population dynamics; Mortality; Fishing grounds; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_27091; Http://aims.fao.org/aos/agrovoc/c_24110; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_4317; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_6111; Http://aims.fao.org/aos/agrovoc/c_4945; Http://aims.fao.org/aos/agrovoc/c_2947.
Ano: 1996
URL: http://hdl.handle.net/1834/1488

Estudio preliminar sobre la estructura de edades y el crecimiento de la pescadilla de red (Cynoscion guatucupa, Pisces, Sciaenidae) en el área sur de la provincia de Buenos Aires
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Ruarte, C.O.; Sáez, M.B.
Otoliths reading of specimens derived from research cruises carried out in the south of the Province of Buenos Aires (39°S-41°S), Argentine Sea, in 1998 and 1999 allowed to determine stripped weakfish (Cynoscion guatucupa, Pisces, Sciaenidae) age and growth.
Tipo: Journal Contribution
Palavras-chave: Age determination; Growth; Otoliths; Age determination; Growth; Otoliths; Http://aims.fao.org/aos/agrovoc/c_24110; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_27091.
Ano: 2008
URL: http://hdl.handle.net/1834/3144

Estimación de la edad, el crecimiento y la mortalidad natural de la merluza de cola (Macruronus magellanicus) en el océano Atlántico sudoccidental durante el verano de 2010
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Zavatteri, A.; Abachian, V.E.; Giussi, A.R.; Di Leva, I.V.
Estimate of age, growth and natural mortality of longtail hake (Macruronus magellanicus) in the Southwest Atlantic Ocean during summer 2010. Longtail hake (Macurornus magellanicus) total length (TL) and weight (W) growth parameters were estimated and age structure and natural instantaneous mortality coefficient (M) analyzed. Data were obtained within the framework of the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP) “Observers on Board of Commercial Vessels” Subprogramme. The information, derived from the area comprised between 46° S-54° S, was collected during the February-April 2010 period. Sagittae otoliths reading of 5,034 individuals (2,429 males and 2,605 females) between 28-99 cm TL was performed. The maximum ages observed in...
Tipo: Journal Contribution
Palavras-chave: Age determination; Growth; Natural mortality.
Ano: 2013
URL: http://hdl.handle.net/1834/5504

Preliminary study of age, growth and birthdates of juvenile sardine &lt;Sardina pilchardus&gt; (Walbaum, 1792) and European anchovy Engraulis encrasicolus (Linnaeus, 1758) in the east coast of Tunisia
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Khemiri, S.; Gaamour, A.
The microstructures of the otoliths of juvenile sardines (Sardina pilchardus) and anchovies (Engraulis encrasicolus), collected in the East coast of Tunisia, were analyzed in order to estimate age, daily growth and hatch date. The fork length of sardines varied from 48 to 103 mm and estimated age ranged from 105 to 297 days. For the anchovies, the estimated age ranged from 79 to 300 days and the fork length from 42 to 86 mm. The length-age data of both species were fitted to the laird-Gompertz model. The corresponding growth equations were [lt=10.8 exp(2.74(1-exp(-0.006t)))] for sardines and [lt=3.1 exp(3.2(1-exp(-0.02t)))] for anchovies. The instantaneous growth rates of the juvenile of both species in the East of Tunisia were in agreement with the data...
Tipo: Journal Contribution
Palavras-chave: Age determination; Daily; Growth; Hatching; Microstructure; Otoliths; Population structure; Age determination; Growth; Otoliths; Population structure; Hatching; Http://aims.fao.org/aos/agrovoc/c_24110; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_27091; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_3504.
Ano: 2005
URL: http://hdl.handle.net/1834/3797

Relation entre la densite des microstries et le rayon de l'otolithe compatible avec le modele de von Bertanlanffy: application a Lutjanus sebae (Cuvier, 1828) aux Seychelles
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Chauvelon, P.; Bach, P.
The age study of fishes using daily growth increments DGI observations is made from: 1- either the exhaustive determination of increments, 2- or the calculation of daily growth increments density for different otolith zones between the nucleus and the margin edge of otolith, the width of increments being presumed constant for each zone. To apply the first method, increments may be readable individually from the nucleus to the margin edge of otolith. This is a very time consuming operation. It can cause miscalculation of increments and errors of the age estimation. The second method, called "DGI density method" is based on the decrease of the increment width in relation to the slowing down of the growth phenomena. The more used approach according to this...
Tipo: Report
Palavras-chave: LUTJANUS SEBAE; Age determination; Growth; Methodology; Otolith reading; Age determination; Growth; Methodology; Http://aims.fao.org/aos/agrovoc/c_24110; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_12522.
Ano: 1994
URL: http://hdl.handle.net/1834/1315

Relation entre la densité des microstries et le rayon de l'otolithe compatible avec le modèle de von Bertanlanffy: application à Lutjanus sebae (Cuvier, 1828) aux Seychelles
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Bach, P.; Chauvelon, P.
Daily growth increments (DGI) density - otolith radius relationship according to the von Bertanlanffy's growth model: application to Lutjanus sebae (Cuvier, 1828) in Seychelles. Often, age determination of fishes is conducted from several parts (scales and otoliths for teleost fishes, vertebrae, spine, opercular bones, ...) displaying seasonal marks (annuli) associated with growth checks, which can be used for the estimation of individual age. Since Panella's (1971, 1974) discovery of the daily growth increments (DGI) in the teleost otoliths, age determination with DGI method has been used more and more on larval stages of both temperate and tropical species and juvenile and adult individuals of, principally, snapper and grouper species. The age study of...
Tipo: Report
Palavras-chave: Otolith reading; Age determination; Methodology; Growth; Lutjanus sebae.
Ano: 1993
URL: http://hdl.handle.net/1834/5119

Sobre la edad y el crecimiento de la caballa (Scomber japonicus) de Mar del Plata
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Forciniti, L.; Perrotta, R.G.
This is the first paper in which back-calculation is applied to growth study on Mar del Plata mackerel (Scomber japonicus). The edge of 2102 otoliths sagittae were analyzed and age reading and mesurements were done in 609 of them. It was stated that hyaline ring formation is annual and that it occurs during the winter and the spawning season.
Tipo: Journal Contribution
Palavras-chave: Age determination; Growth curves; Age determination; Http://aims.fao.org/aos/agrovoc/c_24110.
Ano: 1988
URL: http://hdl.handle.net/1834/1964

Age et croissance de Pagellus bellottii (Sparidae) des cotes Mauritaniennes
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Ould Yarba, L.; Ghorbel, M.; Bouain, A.
The red Pandora Pagellus bellottii is one of the most important demersal species in the fisheries of Mauritanian coasts. Several gears and fleet traditionally exploit it. The studies concerning this fish and particularly those of its age and growth are rare and haven't used the adequate method, which uses hard pieces like scale and vertebra. The objective of the present work is to contribute to the knowledge of the growth parameters of the red Pandora using the scales method not yet used in the studied area. To determine the age and to study the growth of Pagellus bellottii in Mauritanian coasts, we have used the scales of 544 individuals. We have taken, 8 scales under the fin pectoral and we have read the age using a binocular magnifying glass provided...
Tipo: Journal Contribution
Palavras-chave: Pagellus bellottii  Sparidae; Age; Age determination; Growth; Scale reading; Pagellus bellottii; Sparidae; Http://aims.fao.org/aos/agrovoc/c_43241; Http://aims.fao.org/aos/agrovoc/c_43233.
Ano: 2004
URL: http://hdl.handle.net/1834/4245

Estudio de edad y crecimiento del besugo Pagrus pagrus del sector costero bonaerense
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Cotrina, C.P.; Raimondo, M.C.
The samples analyzed for growth parameters determination both in length and weight of the red porgy Pagrus pagrus corresponded to the years 1972 up to 1981 and to two areas of the Buenos Aires (Argentina)coastal shelf: a northern one (35°-36°S)and a southern one (39°-40°). Through age determination, based on the countdown of rings in scales, the parameters of the von Bertalanffy growth equation for the two mentioned areas were estimated as follows: 1)northern area:Lý=44.7;k=0.154;to=-2.96, and 2)southern area:Lý=49.9;k=0.153;to=-2.81. The results shown that the infinite length of the red porgy from the southern area was the greatest. The maximum likelihood method permitted to calculate, for each region,the three parameters and the respective confidence...
Tipo: Journal Contribution
Palavras-chave: Age determination; Growth; Length-weight relationships; Age determination; Growth; Http://aims.fao.org/aos/agrovoc/c_24110; Http://aims.fao.org/aos/agrovoc/c_3394.
Ano: 1997
URL: http://hdl.handle.net/1834/1937

Identificación de las primeras marcas de crecimiento en los otolitos de juveniles de castañeta Cheilodactylus bergi (Pisces:Cheilodactylidae).
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Wöhler, O.C.
Hyaline or slow growth rings were identified in juvenile castañeta otoliths Cheilodactylus bergi, with the aim of establishing an objective criteria for age determination in this life stage.Samples were obtained from four research cruises carried out between 1988 and 1991 in the north-patagonian continental shelf and Argentine-Uruguayan Common Fishing Zone (CFZ)(SW Atlantic, between 34° and 47°S). Through measurement of sagitta otoliths, the existence of three hyaline rings was determined. The one closer to the nucleusis formed during the first winter in the fish life or when larval metamorphosis occurs (1-2 months after spawning peak). The second ring was related to the transitional period between postlarvae and juvenile. This involves a habitat change,...
Tipo: Journal Contribution
Palavras-chave: Age determination; Otoliths; Juveniles; Age determination; Otoliths; Juveniles; Http://aims.fao.org/aos/agrovoc/c_24110; Http://aims.fao.org/aos/agrovoc/c_27091; Http://aims.fao.org/aos/agrovoc/c_25393.
Ano: 1997
URL: http://hdl.handle.net/1834/1925

Características ecológicas del pulpito Octopus Tehuelchus en tres ambientes del golfo San Matías
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Storero, L.P.
Coastal marine ecosystems are highly variable and the inherent biotic and abiotic factors of these environments can influence the bio-ecological characteristics of the living cephalopods. The presence of the small octopus “pulpito” Octopus tehuelchus in the coastal environments of San Matías Gulf has been exploited by artisanal fishermen for more than 60 years. The aim of this study is to evaluate the variations in the life cycle of the pulpito, and the factors that could account for these variations in three different coastal environments of San Matías Gulf, with differences in the physical, ecological and fisheries characteristics. This study was developed in San Antonio bay, El Fuerte and Islote Lobos. Monthly samplings (October 2005-2007) in the...
Tipo: Theses and Dissertations
Palavras-chave: Fishery biology; Cephalopod fisheries; Artisanal fishing; Coastal zone management; Coastal environment; Environmental conditions; Population dynamics; Sex composition; Spatial distribution; Morphology (animal); Life cycle; Feeding; Size-at-first-maturity; Age determination; Growth; Reproduction; Reproductive behaviour.
Ano: 2010
URL: http://hdl.handle.net/1834/5023

Avances en métodos y tecnología aplicados a la investigación pesquera. Seminario final del Proyecto INIDEP-JICA sobre evaluación y monitoreo de recursos pesqueros 1994-1999
Provedor de dados: Ocean Docs: e-repository of  publications
The Seminar organized by the Japan International Cooperation Agency (JICA) and the National Institute for Fisheries Research and Development (INIDEP) of Argentina, was held at INIDEP, Mar del Plata from September 6-9, 1999. The publication comprises expanded abstracts of each presentation, in four Theme Sessions: Reproduction and Survival, Age and Growth, Stock Identifcation and Resource Management Techniques and Relation between Oceanographic and Fishing Conditions. Presentations focused mainly on the following marine resources: squids Illex argentinus and Loligo sanpaulensis; and fish species southern blue whiting Micromesistius australis, patagonian hoki Macruronus magellanicus, kingklip Genypterus blacodes,  patagonian toothfish Dissostichus...
Tipo: Book
Palavras-chave: International cooperation; Research programmes; Fishery resources; Reproduction; Survival; Growth; Age determination; Fishery management; Population structure; Stock identification; Mesh selectivity; Satellite sensing.
Ano: 1999
URL: http://hdl.handle.net/1834/5510

Relation entre la densite des microstries et le rayon de l'otolithe compatible avec le modele de von Bertanlanffy: application a Lutjanus sebae (Cuvier, 1828) aux Seychelles
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Bach, P.; Chauvelon, P.
The age study of fishes using daily growth increments DGI observations is made from: 1- either the exhaustive determination of increments, 2- or the calculation of daily growth increments density for different otolith zones between the nucleus and the margin edge of otolith, the width of increments being presumed constant for each zone. To apply the first method, increments may be readable individually from the nucleus to the margin edge of otolith. This is a very time consuming operation. It can cause miscalculation of increments and errors of the age estimation. The second method, called "DGI density method" is based on the decrease of the increment width in relation to the slowing down of the growth phenomena. The more used approach according to this...
Tipo: Report
Palavras-chave: LUTJANUS SEBAE; Age determination; Growth; Methodology; Otolith reading; Age determination; Growth; Methodology.
Ano: 1994
URL: http://hdl.handle.net/1834/1315

Edad, crecimiento e influencia del ambiente en la distribución de Paralichthys patagonicus en el Sistema Costero del Atlántico Sudoccidental ( 34º-41ºS)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Riestra, C.M.
La edad, el crecimiento y la influencia del ambiente en la distribución estacional (invierno y primavera) de las clases de edad de Paralichthys patagonicus  fueron estudiadas en el Sistema Costero del Atlántico Sudoccidental (SCAS) (34º-41ºS). Para determinar la edad se analizaron los otolitos sagittae provenientes de 1402 ejemplares colectados en otoño-invierno (n = 695) y en primavera-verano (n = 707) en campañas de investigación y desembarque comercial realizados entre el 2005 y 2009. En cada ejemplar se determinó largo total, peso, sexo. La validación de la formación de los anillos de crecimiento se realizó mediante el análisis mensual del borde del otolito. La precisión de las lecturas se evaluó a través del índice de precisión, coeficiente de...
Tipo: Theses and Dissertations
Palavras-chave: Age determination; Growth; Environmental conditions; Geographical distribution; Coastal waters; Geographical distribution; Age determination; Growth; Coastal waters; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_24110; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_25205; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 2010
URL: http://hdl.handle.net/1834/4065

Determination of minimal age of five species of Chusquea bamboos through rhizome analysis as a tool to predict the flowering in southern Chile
Provedor de dados: Revista Chilena de Historia Natural
Autores: TAGLE,LEONARDO; MURÚA,ROBERTO; BRIONES,MIREYA; MONTALBA,RENE; LAMBIN,XAVIER.
Synchronous flowering and subsequent drying up of bamboos of the genus Chusquea are important processes in the dynamics and structure of many forest ecosystems. In southern South America, bamboo flowering and subsequent mast seeding trigger rodent outbreaks associated with zoonotic diseases. Predicting future flowering events requires knowledge of the age of bamboo stands together with species-specific periodicity in flowering. We explored whether it is possible to predict the minimum age in bamboo plants based on the features of their rhizomes. We studied bamboo stands of age known by the local people in 15 sites in the coastal and Andes Mountains as well as in and the Central Valley of southern Chile (37° 48'- 43° 58' S, from 12 to 1047 m.a.s.l.). For...
Tipo: Journal article
Palavras-chave: Age determination; Bamboo; Chusquea spp; Hanta; Seed masting; Rhizome.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2013000400004

Crescimento relativo e determinação da idade na fase juvenil de Armases angustipes (Dana) (Decapoda, Brachyura, Grapsidae)
Provedor de dados: Zoologia
Autores: Kowalczuk,Vania G.L.; Masunari,Setuko.
The relative growth of the male chelipod and female abdomen of Armases angustipes (Dana, 1852) was studied in order to determine the carapace size of puberty. Also, the age of juvenile crabs in laboratory was established. A total of 537 males and 557 females were analysed and the transition point between mature and immature stages was determined for both sexes. Males attain maturity at 1.00 cm carapace width and females at 1.08 cm. The relative growth of female abdomen was more remarkable than that of the male chelipod, although both are positive allometric. It suggests a greater importance of a large abdomen in females than a strong chelipod in males. Juvenile crabs reared from megalopa stage has five developmental stages before reaching sexual...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Armases angustipes; Crabs; Relative growth; Age determination.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000100002