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Registros recuperados: 38
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Algunos aspectos de la biología pesquera del langostino (Pleoticus muelleri)de la Bahía Blanca y un análisis del desembarco comercial del período 1955-1979 OceanDocs
Bertuche, D.A.; Wyngaard, J.G..
This study was carried out in order to get somme knowledge on the characteristics of the fisheries of the shrimp Pleoticus muelleri in the area of Bahia Blanca during 1980-1981. Monthly samplings in the fishing area were performed, and the landing data from 1955 to 1979 were analized.
Tipo: Journal Contribution Palavras-chave: Size distribution; Growth curves; Length-weight relationships; Landing statistics; Yield; Shrimp culture.
Ano: 1982 URL: http://hdl.handle.net/1834/2053
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Alimentación del pez limón, Seriola lalandi (Valenciennes, 1833 in Cuvier y Valenciennes, 1833) en aguas bonaerenses OceanDocs
Vergani, M..
The yellowtail kingfish, Seriola lalandi, Carangidae (Valenciennes, in Cuvier y Valenciennes, 1833) is a pelagic, schooling fish, with gregarious behaviour. It is a circumglobal species from tropical and temperate waters. Adult S. lalandi migrate to Argentine waters (SW Atlantic) during summer months (January-April). They have been reported from Argentine waters in depths of 20-36 m between 36°S and 38° and, as reported elsewhere in the world, are often associated with rocky reefs. Samples of S. lalandi were caught using trolling lines during daytime around rocky reefs at 35° 52'-35° 58'S and 54° 45'-54° 48'W, on February 15-22, 2002. Sixty-six adult S. lalandi were analyzed, with specimens measured (LT) and weighted (WT). The length-weight relationship...
Tipo: Theses and Dissertations Palavras-chave: Feeding behaviour; Feeding migrations; Nursery grounds; Stomach content; Taxonomy; Length-weight relationships; Feeding behaviour; Taxonomy; Nursery grounds; Http://aims.fao.org/aos/agrovoc/c_10778; Http://aims.fao.org/aos/agrovoc/c_7631; Http://aims.fao.org/aos/agrovoc/c_25438.
Ano: 2005 URL: http://hdl.handle.net/1834/2561
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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 biológico-pesqueros del abadejo (Genypterus blacodes) OceanDocs
Renzi, M.A..
The kingklip is one of the species that has been traditionally exploited in the Argentine Sea. Although captures were not very important, they have been increased in the last years. In this paper, the structure of the concentration areas of summer, spring and winter distribution and other biological aspects were analyzed, on the basis of the data collected during cruises carried out by R/V"Walther Herwig" and R/V"Shinkai Maru" in Argentine waters during 1978/79. The trophic spectrum of the kingklip comprises mainly food species of the Classes Pisces and Crustacea as well as other complementary groups like Mollusca, Brachiopoda and haliacea.
Tipo: Journal Contribution Palavras-chave: Geographical distribution; Population structure; Size distribution; Feeding; Length-weight relationships; Food chains; Trophic relationships; Geographical distribution; Population structure; Feeding; Food chains; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_3014.
Ano: 1986 URL: http://hdl.handle.net/1834/2027
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Biometric relationships and fattning rate of bluefin tuna "Thunnus thynnus thynnus" L. 1758 in Tunisian fish farm OceanDocs
Hattour, A.; Moussa, A..
An analysis of data from a Tunisian farm during the months of June to November of the year 2008 is presented. These data were broken down into two sets the first concern sampled fish while towing them to farm (wild set), the second set concern sampled specimen at the end of fattening process (fattening set). The wild group comprised specimens ranging from 90 to 276 cm fork length, and the fattened group included specimens from 105 to 310 сm. Juvenile proportion (Lf<130 сm) in fattened specimen (15.7%) was considerably smaller compared to the proportion in wild specimens (61,8%). The distribution of individual weights of slaughtered BFT shows the prevalence 31-50 kg specimen class (60.4%). The L-W relationships were determined for each of these sets....
Tipo: Journal Contribution Palavras-chave: Thunnus thynnus; Tuna fisheries; Length-weight relationships; Fish farms; Tuna; Fattening.
Ano: 2012 URL: http://hdl.handle.net/1834/5315
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Características biológicas y de la pesca del savorín Seriolella porosa (Pisces: Centrolophidae) del Mar Argentino OceanDocs
Garciarena, A.D.; Perrotta, R.G..
Length growth parameters were calculated and total length-weight and total length-fork length relationships, which showed no differences between sexes, were fitted for the South Atlantic bream (Seriolella porosa). Length at first maturity was also calculated. The results were as follows: L (mm)= 490.96k years-¹) = 0.154; t0 (years)= -3.915; W(g) = 4*10-6)*TL³.1989; FL(mm) = 0.8917*TL1.0006);L sub 50 (mm)= 290.61. Natural mortality was estimated at 0.274 and limit age at 11 years. Samples were taken during research surveys carried out in 1999 and 2000 in the Argentine Sea (Atlantic SW). Sagittae otoliths of 374 specimen were used for age determination. Total fish length ranged from 226 mm to 550 mm (1-14 years). Commercial landing data of trawl fleets for...
Tipo: Journal Contribution Palavras-chave: Growth rate; Natural mortality; Length-weight relationships; Catch/effort; Landing statistics; Fishery biology; Fishery resources; Growth rate; Fishery biology; Fishery resources; Http://aims.fao.org/aos/agrovoc/c_16130; Http://aims.fao.org/aos/agrovoc/c_2937; Http://aims.fao.org/aos/agrovoc/c_2942.
Ano: 2002 URL: http://hdl.handle.net/1834/2416
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Consideraciones sobre el crecimiento de la caballa (Scomber japonicus marplatensis)durante su primer año de vida OceanDocs
Sánchez, R.P..
Through the analysis of the morphological changes ocurring in the process of growth, it was possible to identify three stages (primary juvenile: 25-75 mm; secondary juvenile: 76-160 mm; and juvenile preadult: 161-250 mm)during the first year of the species life. Regression equations for the different relations studied: body weight/body lenght, body surface/body lenght, body surface/body weight, and metabolic rate/body lenght, have been calculated for each stage. The variation of the number of gill rakers, mean distance between adjacent rakers and mean values of gill rakers lenght in reference to body growth was studied, and the relation between filtering area and body length was established.
Tipo: Journal Contribution Palavras-chave: Length-weight relationships; Condition factor; Gills; Juveniles; Mackerel fisheries; Gills; Http://aims.fao.org/aos/agrovoc/c_3262.
Ano: 1982 URL: http://hdl.handle.net/1834/2047
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Crecimiento y mortalidad de la castañeta Cheilodactylus bergien la zona común de pesca Argentino-Uruguaya OceanDocs
Wöhler, O.C..
Growth parameters based on age assignation, length-weight relationship and mortality rates of castañeta Cheilodactylus bergi were studied. Samples came from landings at Mar del Plata Port(Buenos Aires province, Argentina) during 1989, and from a research cruise carried out in the Argentine-Uruguayan Common Fishing Zone(CFZ) during 1991. Castañeta is a longeval demersal species. The growth parameters of von Bertalanffy special model were: 1) Lý 31.95,34.69, 32,30; 2) K 040, 033, 039; and 3) t0 0.00, -0.16, 0.03 corresponding to males, females and all fish respectively. The rates of total mortality (Z) were 0.18, 0.16 and 0.17 for males, females and all fish, respectively. Because of the low rate of exploitation during the study, this values can be used as...
Tipo: Journal Contribution Palavras-chave: Growth; Mortality; Length-weight relationships.
Ano: 1997 URL: http://hdl.handle.net/1834/5792
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Diferencias entre parámetros vitales de las poblaciones bonaerense y patagónica de anchoíta argentina. OceanDocs
Hansen, J.E..
Two pelagic cruises were carried out by R/V"Cap.Oca Balda" in the spring of 1988 and the following summer. Anchovy samples were taken in order to increase the knowledge on the differences between two main stocks of the species, inhabiting the Argentine Sea from 35°S southwards, with distributional boundary situated at about 41°S. Length-weight relationships were statistically different among populations. Weight-at-length values calculated for the summer cruise were higher tha sprin estimates, and they were also higher within Northern individuals. The differences were not statistically significant between stocks, but there are reasons to believe that if ages 1 and 6 of both stocks had been represented those differences would have been increased. Mortality...
Tipo: Journal Contribution Palavras-chave: Length-weight relationships; Growth; Mortality; Size distribution; Growth; Mortality; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1994 URL: http://hdl.handle.net/1834/1933
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Distribución, áreas de concentración y estructura de la población del abadejo (Genypterus blacodes) OceanDocs
Renzi, M.A..
The "abadejo" is one of the species that has been traditionally exploited in the Argentine Sea. Although the capture was not very important, it has been increased in the last years. In this work, the structure of the concentration areas of summer, spring and winter distribution and other biological items were analyzed, basing on the data collected during cruises effected by R/V "Walther Herwing" and R/V "Shinkai Maru" in these waters during 1978/79. Winter and spring distribution patterns showed the highest concentrations located between 41º and 48º SL, specially on the slope. Summer distribution pattern showed the concentration areas located between 43º30' and 48º30' LS shifted rather to the coast when comparing to the previous one. During the winter, in...
Tipo: Theses and Dissertations Palavras-chave: Geographical distribution; Population structure; Feeding; Length-weight relationships; Stomach content; Diets; Seasonal distribution.
Ano: 1982 URL: http://hdl.handle.net/1834/5028
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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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Dynamique de la population de Sandre Stizostedion Lucioperca OceanDocs
Toujani, R.; Kraiem, M.M..
L’étude de la dynamique de population du sandre Stizostedion lucioperca dans la retenue du barrage de Sidi Salem (nord de la Tunisie) a été réalisée durant deux saisons : avril 1996 - mars 1998 . Elle a porté sur un échantillon de 1325 individus capturés par les pêcheurs professionnels. Cette étude a montré que: - La taille moyenne individuelle des sandres captures est inférieure à 30 cm pour une proportion supérieure à 75 % . - La taille de recrutement dans la pêcherie estimée à 18 cm est très inférieure à la taille de première maturité sexuelle de l’ espèce qui est de 24 cm. - La taille et la masse individuelles moyennes des sandres capturés se sont améliorées durant la saison 1997 par rapport à celle de 1996. - Le taux de mortalité par pêche des groupes...
Tipo: Journal Contribution Palavras-chave: Taille; Mortalité; Length-weight relationships; Recrutement; Masse; Recruitment; Stizostedion lucioperca; Mortality; Freshwater fish; Population dynamics; Pike perch; Http://aims.fao.org/aos/agrovoc/c_5877.
Ano: 2002 URL: http://hdl.handle.net/1834/221
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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 OceanDocs
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
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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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Estrutura da população e relação peso-comprimento de Engraulicypris sardella (Gunther, 1968) capturado no Lago Niassa, Região de Metangula, Moçambique OceanDocs
PEGADO, Antonio J..
The present study analyses the length frequency distribution and total length-weight relationship of Engraulicypris sardella, a Cyprinidae fish endemic to Lake Niassa and the most caught in the lake. Fish were sampled from January to December 2012 through artisanal catches landing at Metangula. Results indicate that the total length (cm) from 1,449 specimens varies from 1.5 to 12.5 cm and the average was 9.26 cm ± 2.47. Engraulicypris sardella exhibited recruitment between August to December. The lengthweight relationship is expressed as the following equation P(g) = 0.00497*CT(cm)3.12 and suggests the isometric growth in this species. Further studies about length, growth and abundance were recommended
Tipo: Journal Contribution Palavras-chave: Length frequency; Length-weight relationships; Engraulicypris sardella.
Ano: 2013 URL: http://hdl.handle.net/1834/5300
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Estudio biométrico, estructura poblacional y habitat del camarón Penaeus vannamei, Boone en criaderos OceanDocs
Reinoso, B..
The present work is about biometry study, population structure and habitat Penaeus vannamei, Boone shrimp cultivated in ponds 939 shrimps were analised from March-July 1991 at a shrimp farm located in Hebano-Manabí port. The analysis demostrated that a strong difference exists between the male and female shrimp product of morphological diformis in this species. Also, the calculated correlation coeficient values were always near the unit indicated for us that the relations between the different averages were very narrow. The proportion of the sexes showed a clear predominance of the females over the males. The proportions being 60%/40% respectively. Aside from this, this population distribution remained steady during the period of the investigation. The...
Tipo: Journal Contribution Palavras-chave: Biometrics; Habitat; Population characteristics; Breeding; Crustacean culture; Length-weight relationships; Breeding; Crustacean culture; Http://aims.fao.org/aos/agrovoc/c_49902; Http://aims.fao.org/aos/agrovoc/c_1985.
Ano: 1993 URL: http://hdl.handle.net/1834/3048
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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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Estudio de edad y crecimiento del besugo Pagrus pagrus del sector costero bonaerense OceanDocs
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
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Estudio de la condición nutricional de larvas de la población bonaerense de anchoíta (Engraulis anchoita) en relación con las características hidrográficas del área de crianza OceanDocs
Díaz, M.V.; Pájaro, M..
The study of larvae nutritional condition allows to assess the physiologic state that reflects the environmental situation they were exposed to. It represents a useful instrument to determine favourable nursery areas, provides tools for the management of a population subject to fishing and furnishes information to establish appropriate closed areas and periods. The material analyzed derived from three cruises carried out to assess Argentine anchovy Northern stock during the 2003, 2004 and 2006 reproductive peak (SW Atlantic Ocean, Argentine Sea). The objective of this work was to study the nutritional status of Argentine anchovy first feeding larvae caught in the coastal and mid-shelf of the Río de la Plata River maritime front in relation to the...
Tipo: Journal Contribution Palavras-chave: Fish larvae; Nursery grounds; Spawning populations; Morphometry; Length-weight relationships; Abundance.
Ano: 2013 URL: http://hdl.handle.net/1834/5496
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Estudio sobre el crecimiento en peso y factor de condición en larvas de anchoíta, Engraulis anchoita Hubbs & Marini. Variaciones regionales, estacionales y anuales OceanDocs
de Ciechomski, J.D.; Sánchez, R.P.; Alespeiti, G.; Regidor, H..
The equation log W=a+bL (where W=dry weight in ug, and L=total length in mm)was used to describe the growth in weight of larval anchovy collected in two areas of the Argentine sea, sampled in different months and several years. Regression lines were compared by covariance analysis applied to two size groups, namely larvae less and over 10 mm total length, as an evident break in the slopes indicated the existence of a chenge of rythm in the trajectory of larval growth in length. Significant differences between the slopes of the growth lines were observed within the smaller size group. No regional or yearly differences could be established fo larvae larger than 10 mm.
Tipo: Journal Contribution Palavras-chave: Length-weight relationships; Fish larvae; Condition factor; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 1986 URL: http://hdl.handle.net/1834/2023
Registros recuperados: 38
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