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Registros recuperados: 27
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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 OceanDocs
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
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Algunos resultados de las campañas primaverales de evaluación anual de anchoíta bonaerense efectuadas entre 1993 y 1996. OceanDocs
Hansen, J.E.; Madirolas, A..
Information resulting from four spring acoustic surveys carried out between 1993 - 1996 to assess bonaerensis anchovy (Engraulis anchoita) biomass (34°- 41°30´S) is presented. Annual estimates, successively higher, went from 1.5 to 5.3 millon tons and the respective coefficient of variability that followed the same trend ranged between 7.4. and 28.0. . In general terms, the largest abundances were those recorded within the coastal strata off the Río de la Plata followed by those of the most southern stratum. Nevertheless, during the 1996 survey, the latter showed very high biomass values and, consequently, the largest mean. The region corresponding to the main commercial anchovy fishing ground during the season represented, in any case, relatively low...
Tipo: Journal Contribution Palavras-chave: Echo surveys; Biomass; Sexual maturity; Growth; Mortality; Biomass; Growth; Sexual maturity; Mortality; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_7016; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1999 URL: http://hdl.handle.net/1834/2531
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Análisis secuencial de la población de merluza de cola (Macruronus magellanicus)en el atlantico sudoccidental período 1985-1995. OceanDocs
Wöhler, O.C.; Giussi, A.R.; Hansen, J.E..
Sequential population analysis on Long Tail Hake (Macruronus magellanicus)from the Southwest Atlantic. Years 1985-1995. VPA on the Long Tail Hake (Macruronus magellanicus), based on data covering the years 1985 up to 1995, was performed to assess the current state of the stock. Simulation trials, inducing uncertainty about both the natural mortality rate and recruitment were also accomplished, to evaluate the risk of overfishing which is associated to different fishing alternatives, always under the assumption of a single and closed Long Tail Hake population. CPUE data were not appropriate for tunning, so the traditional VPA has been applied. During the period of study, stock biomass and spawning stock biomass showed an increased trend. Long and short-term...
Tipo: Journal Contribution Palavras-chave: Stock assessment; Fishery management; Catch/effort; Fishing mortality; Overfishing; Biomass; Sexual maturity; Stock assessment; Fishery management; Biomass; Overfishing; Sexual maturity; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_34068; Http://aims.fao.org/aos/agrovoc/c_7016.
Ano: 1999 URL: http://hdl.handle.net/1834/1875
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Aspectos biológico-pesqueros de la merluza de cola del Atlántico Sudoccidental OceanDocs
Bezzi, S.I..
The distribution areas and population structure of the long-tailed hake are analized. Data come from fisheries research cruises carried out by RV Walther Herwig and Shinkai Maru in the Argentine Sea in 1978/79. Macruronus magellanicus is a typical cold waters species of the Southwest Atlantic and Southeast Pacific Oceans. Maximum concentrations were found in the southern Patagonian shelf, in coastal waters and in depths below 200 m. Spawning individuals were observed on the continental slope in the southern extreme of the Patagonian shelf (54°). The distribution area extend to 93,439 n mi² in spring and to 12,368 n mi² in summer.
Tipo: Journal Contribution Palavras-chave: Geographical distribution; Size distribution; Sexual maturity; Length-weight relationships; Hake fisheries; Geographical distribution; Sexual maturity; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_7016.
Ano: 1984 URL: http://hdl.handle.net/1834/2046
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Aspectos biológicos del calamar Illex argentinus OceanDocs
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
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Aspectos reproductivos de las principales especies de peces en la Zona Comun de Pesca Argentino-Uruguaya y en El Rincón. Noviembre, 1994 OceanDocs
Macchi, G.J.; Acha, E.M..
The maturity stages of the main commercial coastal fishes caught during the cruise H-13/94 are macroscopically analyzed, focusing this study on the white croaker Micropogonias furnieri and the striped weakfish Cynoscion striatus. Samples were obtained in the Argentine-Uruguayan Common Fishing Zone (AUCFZ) and El Rincón (Buenos Aires Prov., Argentina) during November 1994.
Tipo: Journal Contribution Palavras-chave: Marine fish; Reproduction; Sexual maturity; Environmental conditions; Coastal waters; Reproduction; Sexual maturity; Environmental conditions; Coastal waters; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_7016; Http://aims.fao.org/aos/agrovoc/c_32980; Http://aims.fao.org/aos/agrovoc/c_25205.
Ano: 1998 URL: http://hdl.handle.net/1834/2473
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Biologie de l'anchois (<Engraulis encrasicolus>) en Mauritanie OceanDocs
Ba, I.S..
L’étude du cycle sexuel de l’Anchois montre que la principale période de reproduction s’étend d’avril à octobre. Celle-ci serait sous la dépendance principale de l’élévation de la température de surface. La croissance, abordée à l’aide des marques supposées journalières sur les otolithes, donne des résultats jugés satisfaisants jusqu’à 10 cm L.F. Par contre, ceux concernant les tailles supérieures devront être confirmés.
Tipo: Journal Contribution Palavras-chave: Biology; Growth; Otoliths; Sexual maturity; Sexual reproduction; Growth; Otoliths; Biology; Sexual maturity; Sexual reproduction; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_27091; Http://aims.fao.org/aos/agrovoc/c_925; Http://aims.fao.org/aos/agrovoc/c_7016; Http://aims.fao.org/aos/agrovoc/c_26876.
Ano: 1989 URL: http://hdl.handle.net/1834/1146
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Calamares de importancia comercial en Argentina. Biología, distribución, pesquerías y muestreo biológico OceanDocs
Brunetti, N.E.; Ivanovic, M.L.; Sakai, M..
An overview of the available information on the commercially important squid species distributed in the Argentine Sea and adjacent zones is given. It includes the most representative characteristics to identify the species and general information on their biology, distribution and fisheries. A biological sampling designis presented, with particular emphasis on the identification of sexual maturity stages. The world market of the squid resources has considerably risen in the last decades and one of the most important fishery zones is placed in the Southwest Atlantic region (Area 41, FAO), where squid represent 25. of the total landings. Illex argentinus, sustains the second fishery in volume, with landings reaching 612.000 tonnes in 1999. Other species,...
Tipo: Book Palavras-chave: Squid fisheries; Geographical distribution; Animal morphology; Sexual maturity; Biological sampling; Commercial fishing; Landing statistics; Geographical distribution; Animal morphology; Sexual maturity; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_421; Http://aims.fao.org/aos/agrovoc/c_7016.
Ano: 1999 URL: http://hdl.handle.net/1834/2336
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Descripción macroscópica de los ovarios del abadejo manchado (Genypterus blacodes). Escala de maduración OceanDocs
Machinandiarena, L.; Villarino, M.F.; Cordo, H.D.; Macchi, G.J.; Pájaro, M..
The macroscopic ovaric stages of pink cuskeel (Genypterus blacodes) females from the Argentine Sea (SW Atlantic) are described. They were classified in five stages of development based on changes in the appearance and size of the ovary: juvenile (I), developing (II), spawning (III), spent (IV) and resting (V).
Tipo: Journal Contribution Palavras-chave: Fecundity; Ovaries; Developmental stages; Ultrastructure; Sexual maturity; Ovaries; Developmental stages; Ultrastructure; Fecundity; Sexual maturity; Http://aims.fao.org/aos/agrovoc/c_5456; Http://aims.fao.org/aos/agrovoc/c_2230; Http://aims.fao.org/aos/agrovoc/c_8045; Http://aims.fao.org/aos/agrovoc/c_15725; Http://aims.fao.org/aos/agrovoc/c_7016.
Ano: 2003 URL: http://hdl.handle.net/1834/2421
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Distribución, áreas de concentración y estructura de la población del bacalao austral (Salilota australis, Gunther 1887)del Atlántico Sudoccidental OceanDocs
Perez Comas, J.A..
The "bacalao austral" is a typical fish from the cold water of the Southwest Atlantic and the Southeastern Pacific oceans, whose fishery has not yet developed. In this work, the structure of the concentration areas of summer and winter distribution and other biological items were analyzed, basing on data provening from R/V"Walther Herwig" and R/V"Shinkai Maru", which operated in these waters during 1978/79/. The trophic vertical migrations are common in this species.
Tipo: Journal Contribution Palavras-chave: Geographical distribution; Size distribution; Sexual maturity; Feeding; Food chains; Length-weight relationships; Population density; Ecological distribution; Vertical migrations; Cod fisheries; Geographical distribution; Feeding; Food chains; Sexual maturity; Population density; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_3014; Http://aims.fao.org/aos/agrovoc/c_7016; Http://aims.fao.org/aos/agrovoc/c_6112.
Ano: 1980 URL: http://hdl.handle.net/1834/2060
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Ecología reproductiva de tres batoideos (Chondrichthyes): iAtlantoraja castelnaui (Rajidae), Rioraja agassizi (Rajidae) y Zapteryx brevirostris (Rhinobatidae). Implicancias de distintas estrategias reproductivas en un escenario de explotación comercial intensiva OceanDocs
Colonello, J.H..
The reproductive ecology of the Chondrichthyans Atlantoraja castelnaui (spotback skate), Rioraja agassizi (rio skate) and iZapteryx brevirostris (lesser guitarfish) is analyzed in this study. The two first are oviparous species that attain 168 mm and 768 mm of maximum total length (MTL), respectively. The third is a viviparous lecitotrophic ray that grows to a MTL of 720 mm. The examined material came from the purchase of samples in the Mar del Plata Port (Buenos Aires prov., Argentina) and from research cruises carried out by the National Institute of Fisheries Research and Development (INIDEP). Two work lines were developed to analyze the reproductive ecology and to validate the reproductive stages of these species, one based on macroscopic analysis of...
Tipo: Theses and Dissertations Palavras-chave: Marine fish; Reproduction; Animal reproductive organs; Sexual maturity; Histology; Reproduction; Animal reproductive organs; Sexual maturity; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_29449; Http://aims.fao.org/aos/agrovoc/c_7016.
Ano: 2009 URL: http://hdl.handle.net/1834/3546
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Ecología reproductiva y hábitos alimentarios del pez angel, Squatinaguggenheim (Chondrichthyes: Squatinidae), en el Distrito Biogeográfico Bonaerense, entre 34° y 42°S OceanDocs
Colonello, J.H..
The reproductive ecology and feeding habits of Squatina guggenheim inthe SW Atlantic ecosystem between 34° and 42°S were studied. For the reproductive study, 423 individuals were obtained in 12 research cruises between 2000 and 2004. Reproductive parameters were analyzed in two oceanographic systems, the Rio de La Plata estuary (ERLP), Argentine-Uruguayan waters, and the El Rincon (ER), Argentina, Buenos Aires Prov. The feeding habits were analyzed using 329 stomach contents of individuals taken in ERLP (264)and ER (65 ER). For this study the individuals were reproductively (adults and juveniles)and seasonality (fall-winter and spring-summer)grouped. In ERLP the maximum total length was 920 mm for females and 865mm for males; in ER the maximum TL for...
Tipo: Theses and Dissertations Palavras-chave: Feeding behaviour; Food preferences; Stomach content; Sexual maturity; Reproduction; Feeding behaviour; Food preferences; Sexual maturity; Reproduction; Http://aims.fao.org/aos/agrovoc/c_10778; Http://aims.fao.org/aos/agrovoc/c_3024; Http://aims.fao.org/aos/agrovoc/c_7016; Http://aims.fao.org/aos/agrovoc/c_6507.
Ano: 2005 URL: http://hdl.handle.net/1834/2596
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Estimación de parámetros poblacionales del efectivo de sardina fueguina (Sprattus fuegensis) de la costa continental Argentina. OceanDocs
Hansen, J.E..
Patagonian sprat is probably the only pelagic fish species having a considerable biomass within the Argentine Seasouth of 45ºS. There are two populations, the first inhabiting mainly the coastal region around Malvinas Islands and the other close to the coast off Santa Cruz and Tierra del Fuego Provinces, including the fuegian channels. Some results of two seasonal (autumn and spring) patagonian sprat assessment surveys carried out during 1996 are shown. The autumn cruise covered the area between 50° and 55°S, from the continental coast up to 60 m depth, whereas the spring survey extended upto 90 m depth including Le Maire Strait and part of the Beagle Channel. During both seasons, in waters ranging 6.2 - 8.8°C temperature, the species distributed very...
Tipo: Journal Contribution Palavras-chave: Fishery surveys; Length-weight relationships; Sexual maturity; Growth; Mortality; Growth; Sexual maturity; Mortality; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_7016; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1999 URL: http://hdl.handle.net/1834/2530
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Estudio de edad y crecimiento de la raya hocicuda Dipturus chilensis (Guichenot,1848) en el Atlántico Sudoccidental (34º -55º LS y 52º -69º LW) OceanDocs
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
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Estudios sobre reproducción y fecundidad de la polaca (Micromesistius australis Norma 1937)en el Mar Argentino OceanDocs
Sánchez, R.P.; de Ciechomski, J.D.; Acha, E.M..
An analysis is presented of reproduction aspects of Argentine Sea blue whiting. The species spawns in the study area mostly during August and September, although some spawners have been detected even in November. Total length at 50-per-cent maturity was 35,4 cm for the males and 38.0 for the females. Significant differences between the length of maturity for individuals of the continental shelf compared to those of the slope, have been obtained. The southern blue whiting is a discontinuous spawner, showing one annual reproduction peak. Fecundity was investigated on the basis of samples collected in 1978 by the RV"Walther Herwig" and "Shinkai Maru". A significant positive correlation was also observed at relating oocyte dry weight and gonad factor, whereas...
Tipo: Journal Contribution Palavras-chave: Reproduction; Fecundity; Sexual maturity; Stock assessment; Stock assessment; Reproduction; Fecundity; Sexual maturity; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_15725; Http://aims.fao.org/aos/agrovoc/c_7016.
Ano: 1986 URL: http://hdl.handle.net/1834/2028
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Inducción de la madurez gonadal del pargo palmero Lutjanus analis (Pisces: Lutjanidae) mediante la aplicación de un fototermoperiodo artificial de acondicionamiento OceanDocs
Botero-Arango, J.; Castaño-Rivera, F..
An experimental group (N=7) of three females and four males of mutton snapper Lutjanus analis captured in the wild, whose gonadal development entered in a state of latency because of its confinement in the lab, was maintained under an artificial photothermal cycle of 10 months between October 2001 and July 2002 in order to unblock and estimulate again their sexual maturation. Another group of equal number of fish was used as a control, being maintained during the same time without manipulation of temperature and photoperiod parameters. After eight months the three females of the experimental group showed positive gonadal development signs, their oocyte mean diameters (Ø) reaching 122 ± 76; 86 ± 40; and 122 ± 87 µm respectively. During the tenth month one...
Tipo: Journal Contribution Palavras-chave: Sexual maturity; Photoperiods; Sexual maturity; Http://aims.fao.org/aos/agrovoc/c_7016.
Ano: 2005 URL: http://hdl.handle.net/1834/1992
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L'anchois ( engraulis encrasicolus) des cotes nord de la Tunisie : reproduction et exploitation OceanDocs
Gaamour, A.; Khemiri, S.; Mili, S.; Ben Abdallah, L..
The reproduction parameters necessary for stock management and catch analysis of anchovy in the North region of Tunisia were studied. The global sex-ratio is close to 1, special caution should be taken using this parameter as it is size dependant. Mean reproduction period extends from April to October. However within this period individuals of population have different spawning and maturation. The size at first sexual maturity Lm50 is about 7.3cm. In the North region of Tunisia, the anchovy landings are lower than the exploitable biomass, therefore the anchovy is an under-exploitable species in this region
Tipo: Journal Contribution Palavras-chave: Engraulis encrasicolus; Clupeoid fisheries; Catching methods; Fishery management; Reproduction; Sex ratio; Sexual maturity; Spawning; Stock assessment; Fishery management; Spawning; Stock assessment; Reproduction; Sex ratio; Sexual maturity; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_14490; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_7014; Http://aims.fao.org/aos/agrovoc/c_7016.
Ano: 2004 URL: http://hdl.handle.net/1834/4236
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L'anchois <Engraulis encrasicolus> des côtes nord de la Tunisie: reproduction et exploitation. OceanDocs
Khemiri, S.; Gaamour, A.; Mili, S.; Ben Abdallah, L..
التكاثر والاستغلال - يهتم هذا العمل بدراسة معطيات التكاثر، الضرورية لحسن التصرف في المخزون، وبتحليل إنتاج الصيد البحري لسمك الأنشوة بالسواحل الشمالية لتونس. بالنسبة لجملة العينات يتساوى عدد الإناث والذكور مع العلم أن نسبة كل جنس تتغير حسب طول السمكة. يتكاثر سمك الأنشوة خلال الفترة الممتدة من أفريل إلى أكتوبر مع وجود اختلال بين الأفراد. يبلغ سمك الأنشوة نضجه الجنسي الأول لطول يناهز 7.3 صم. يفوق المخزون المتاح استغلاله من سمك الأنشوة الكميات المنزلة بمواني الصيد البحري، تبعا لذلك فإن سمك الأنشوة بالشمال التونسي دون الاستغلال الأمثل.
Tipo: Journal Contribution Palavras-chave: Catch statistics; Reproduction; Sex ratio; Sexual maturity; Reproduction; Sex ratio; Sexual maturity; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_7014; Http://aims.fao.org/aos/agrovoc/c_7016.
Ano: 2004 URL: http://hdl.handle.net/1834/1154
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Le Rouget de roche (Mullus surmuletus l. 1758) des côtes nord tunisiennes : reproduction, sexualité et croissance OceanDocs
M’rabet, R; Gharbi, H; Missaoui, H; Cherif, M.; Jarboui, O.
L’objectif principal de ce travail, est la réactualisation des paramètres biologiques du rouget de roches des côtes Nord tunisiennes qui sont indispensables pour toute étude ultérieure d’évaluation de stock. Le suivi mensuel du rapport gonado-somatique a montré que la période de ponte de rouget de roche s’étale sur 3 mois d’avril à juillet. La taille pour laquelle 50% des individus sont matures a été estimée à une longueur totale de 16,43cm pour les femelles et de 16,02cm pour les mâles. L’étude de la sex-ratio en fonction des mois a montré que les femelles sont toujours plus nombreuses que les mâles. La répartition des sexes en fonction de la longueur totale montre que les femelles dominent dans la plupart des classes de taille. Les équations...
Tipo: Journal Contribution Palavras-chave: Mullus surmuletus; Biological surveys; Growth; Length-weight relationships; Sex ratio; Sexual maturity; Size distribution; Spawning; Growth; Spawning; Sexual maturity; Sex ratio; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_14490; Http://aims.fao.org/aos/agrovoc/c_7016; Http://aims.fao.org/aos/agrovoc/c_7014.
Ano: 2007 URL: http://hdl.handle.net/1834/4151
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Monitoreo de los niveles de testosterona y estradiol en el plasma sanguíneo de hembras de pargo palmero Lutjanus analis mantenidas bajo dos termoperíodos de acondicionamiento diferentes OceanDocs
Castaño-Rivera, F.; Botero-Arango, J..
Two groups of adult Mutton snapper fish Lutjanus analis captured in the wild, each one of three females and four males, were kept during eight months under controlled temperature and photoperiod conditions in the lab in order to stimulate their sexual maturation which was in a state of latency because of the effects of confinement. The first group was maintained under an artificial cycle with temperature manipulation and the second under a control cycle, in which this parameter was left at natural conditions. Every two months blood samples from all females were taken for the analysis of plasma testosterone (T) and oestradiol (E2) levels, taking ovarian biopsies simultaneously to register the mean diameter of the oocytes. After six months, a significative...
Tipo: Journal Contribution Palavras-chave: Sexual maturity; Marine fish; Females; Sexual maturity; Females; Http://aims.fao.org/aos/agrovoc/c_7016; Http://aims.fao.org/aos/agrovoc/c_15969.
Ano: 2005 URL: http://hdl.handle.net/1834/2019
Registros recuperados: 27
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