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  • Feeding  (9)
  • Chemistry
  • Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)  (9)
  • 2015-2019
  • 2005-2009  (9)
  • 1985-1989
  • 1945-1949
Collection
Keywords
Publisher
Years
  • 2015-2019
  • 2005-2009  (9)
  • 1985-1989
  • 1945-1949
Year
  • 1
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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 (2007)
    Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)
    Details
    Publication Date: 2021-05-19
    Description: 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.
    Description: Publisher permission
    Description: Published
    Description: Perciformes, Scombridae, Scomber japonicus, caballa, madurez sexual, reproducción, relaciones largo-peso, estadísticas de desembarque, distribución por tamaño, distribución geográfica, alimentación, migraciones
    Keywords: Feeding ; Geographical distribution ; Reproduction ; Sexual maturity ; Size distribution ; Reproduction ; Sexual maturity ; Feeding ; Landing statistics ; Migrations ; Geographical distribution
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 2
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    Distribución, áreas de concentración y estructura de la población del bacalao austral (Salilota australis, Gunther 1887)del Atlántico Sudoccidental (2007)
    Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)
    Details
    Publication Date: 2021-05-19
    Description: 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.
    Description: Publisher permission
    Description: Published
    Description: Gadiformes, Moridae, Salilota australis, bacalao austral, madurez sexual, relaciones largo-peso, distribución por tamaño, distribución geográfica, distribución ecológica, densidad poblacional, cadena de alimentos, alimentación, migraciones verticales
    Keywords: Geographical distribution ; Feeding ; Food chains ; Sexual maturity ; Population density ; Geographical distribution ; Size distribution ; Sexual maturity ; Feeding ; Food chains ; Length-weight relationships ; Population density ; Ecological distribution ; Vertical migrations ; Cod fisheries
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 3
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    Ecología trófica de la caballa del Mar Argentino (Scombridae, Scomber japonicus marplatensis). Parte I. Alimentación y crecimiento (2007)
    Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)
    Details
    Publication Date: 2021-05-19
    Description: The present study describes the morphology of the digestive system, the feeding and feeding behaviour, and the trophic relationships of the mackerel in the coastal waters regions, pelagic zone, along the Province of Buenol Aires. At the same time, this study is completed with a bioestatistical analysis on growth rhythm of body length and body weight of secondary juveniles, pre-adults and adults. All the biological information and statistical data correspond, only to the period november-march and the summer trophic habitat area.
    Description: Publisher permission
    Description: Published
    Description: Perciformes
    Keywords: Scombridae ; Scomber japonicus ; Relaciones tróficas ; Factor de condición ; Distribución ecológica ; Curvas de crecimiento ; Alimentación ; Sistema digestivo ; Feeding ; Digestive system ; Trophic relationships ; Ecological distribution ; Digestive system ; Feeding ; Growth curves ; Condition factor ; Mackerel fisheries
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 4
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    Distribución y estructura poblacional de la polaca (Micromesistius australis) (2007)
    Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)
    Details
    Publication Date: 2021-05-19
    Description: The polaca (Micromesistius australis)is a typical fish from the cold Malvinas current (temperatures between 3° and 10°C). The species is found in depths between 90 and 800 m and in latitudes from 37°40' to 50° S during winter and spring and from 42°S to 55°S during summer time, over the patagonian shelf and Burdwood Bank. One part of the stock reaches the southern region of the Scotia Sea, the western South Georgias and eastern South Shetland Islands. The dominant food species are Euphausia spp. The polaca is mainly a carcinophagous fish and may be found in a 3-4 trophic level, being one of the main food sources for primary and secondary ichthyophagous fishes.
    Description: Publisher permission
    Description: Published
    Description: Gadiformes, Gadidae, Micromesistius australis, polaca, distribución por tamaño, alimentación, zonas de desove
    Keywords: Feeding ; Spawning grounds ; Size distribution ; Spawning grounds ; Feeding ; Fish species
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 5
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    Alimentación de Merluccius hubbsi e impacto del canibalismo en la región comprendida entre 34°50'-47°s del Atlántico Sudoccidental. (2007)
    Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)
    Details
    Publication Date: 2021-05-19
    Description: Feeding of Argentine hake during winter 1994, between 50 and 370 m of depth, in the studied area (34°50'-47°S), is based on the consumption of zooplanktonic crustaceans, fishes and cephalopods. Maximum feeding incidence is found at 36°-40°S (51. ), in sea layer of 80-130 m deep (62. ) and between 8:00-10:00 hours (36,6. ). Cluster analysis shows five spatial groups, with similar length distributions and characteristic principal prey items combination. The males of all sizes show a trend to feed on euphausids and hiperiids amphipods. The females eat more quantities of hake, short fin squid and other fishes. There is a change in diet related with predator size, from 47 cm TL onwards for males, and from 53 cm TL for females. This change consists in a decrease of macrozooplanktonic crustacean consumption and an increase of fish in diet. There is a decrease in the predation of all preys, with the increase of the depth, except for mictophids fishes, which prevail from 130 m onwards. During the morning hours, all prey items show maximum values in stomach contents. The midday feeding is related with the water layer close to the bottom layer, when hake principally consumes bentic macrocrustacean. Southerly of 44°S the intake of fishes and cephalopods increases. From total hake cannibalized number, 95,7. corresponds to those hakes smaller than 24 cm TL (ages 0 to 2), which were predated by hake group among 35-. 49 cm TL (ages 2 to 7). Cannibals size is between 15 and 81 cm TL (ages 0 to 10)and 47. of them belonged to ages 0 to 2. Cannibalism was greater between 34°-39°S, at depth less than 100 m of depth, where bigger juvenile stocks are concentrated.
    Description: Publisher permission
    Description: Published
    Description: Gadiformes, Merlucciidae, Merluccius hubbsi, merluza, canibalismo, alimentación, organismos alimento, selección de la presa
    Keywords: Feeding ; Cannibalism ; Feeding ; Cannibalism ; Food organisms ; Prey selection
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 6
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    A drift study of vertical distribution and mortality of Engraulis anchoita eggs and larvae. (2007)
    Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)
    Details
    Publication Date: 2021-05-19
    Description: Lagrangian changes in distribution and survival within an anchovy egg and larvae patch were studied by means of multiple opening/closing sampling following a free drifting buoy. The buoy was equipped with a radar reflector and flashing light, and it was connected to a current cross drogue floating at 15 m depth, which corresponded to the main egg and larvae concentration within the patch. The drifter was launched on the Buenos Aires continental shelf, off Necochea during the spring spawning peak of 1983. Three discrete depths (within, below and above the thermocline)were repeatedly sampled close to the drogue with a Motoda sampler. Egg and larval abundances in the vicinity of the drogue were monitored at 3/4 hour intervals for a period of three days. Each plankton station included a set of hydrographic and climatological data registered simultaneously. The efficiency of the drogue as a Lagrangian marker was examined by means of the application of multifactorial ANOVA to test the significance of variability between days, light regime, sampling depths, population structure and their interactions. Wind drag on the surface unit did not significantly affect the trajectory of the drogue. Patterns of embryonic and larval vertical distribution are discussed by means of the variations in the centre of mass, in the vertical dispersion and patchiness indexes for each developmental stage analyzed. There is evidence of diel vertical migration in larvae larger than 8 mm SL. Although the incidence of feeding based on observations of the presence of undigested food in the gut content of larvae was low, a daily feeding pattern over a 14-hour period starting after sunrise, was evident. Evening ascent of larger larvae was not related to feeding activity. A single equation two-stage model, assuming age dependent mortality in the embryonic and post-larval period is derived and compared to standard models based on constant exponential decay during each developmental phase.
    Description: Publisher permission
    Description: Published
    Description: Engraulidae, Engraulis anchoita, anchoíta, relevamientos ictioplanctónicos, relevamientos pesqueros, larvas de peces, huevos de peces, distribución vertical, abundancia, boyas a la deriva, efectos ambientales, alimentación, supervivencia, migraciones verticales
    Keywords: Feeding ; Fish larvae ; Survival ; Fish larvae ; Fish eggs ; Vertical migrations ; Feeding ; Environmental effects ; Ichthyoplankton surveys ; Vertical distribution ; Survival ; Abundance ; Drifting data buoys ; Fishery surveys
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 7
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    Diet composition of Champsocephalus gunnari (Pisces,Channichthyidae)around South Georgia Islands, R/V Dr. Eduardo L.Holmberg survey, February/March 1994. (2007)
    Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)
    Details
    Publication Date: 2021-05-19
    Description: The diet composition of the icefish Champsocephalus gunnari caught around the South Georgia Islands and Shag Rocks, Atlantic sector of Antacrtica in February/March 1994 was analyzed using the frequency of occurrence (. ) method. Krill Euphausia superba followed by the hyperiid amphipod Themisto gaudichaudii were the main prey items at South Georgia and Shag Rocks; first were found in thestomachs more frequently than in past seasons around South Georgia,in parallel with the virtual absence of mysids and Thysanoessaspp. Krill was available for fish at the same level than in previous years (e.g. 1985, 1992). However, high proportion of empty stomachs were found at South Georgia and Shag Rocks, close to the values reported for the 1991 year of krill 'shortage'. Besides, the tentative analysis of part of the samples using coefficient Q (. )showed a greater importance of T.gaudichaudii with respect to krill.It is possible that the inconsistencies found between the results obtained by both methods are due to a particular spatial distribution of krill in the area in the period of study, but no previous data are available for comparison. No krill aggregations were found in the region by acoustic methods in the 1994 summer season; a fact that might be related to a significant change in surface temperature observed during the cruise.
    Description: Publisher permission
    Description: Published
    Description: Channichthyidae, Champsocephalus gunnari, Pez de hielo, relevamientos pesqueros, contenido estomacal, alimentación, preferencias alimenticias
    Keywords: Feeding ; Food preferences ; Feeding ; Food preferences ; Stomach content ; Fishery surveys
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 8
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    Estudios sobre el régimen alimentario del mero (Acanthistius brasilianus)y su relación con las características morfométricas del sistema digestivo (Pisces, Fam.Serranidae) (2007)
    Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)
    Details
    Publication Date: 2021-05-19
    Description: Observations on the stomach content of the sea bass have been made in order to study the trophic spectrum and the feeding habits variations, according to the season, region and individual size. On the other hand, some morphometric and meristic characters of the buccopharyngeal cavity have been statistically analyzed in relation with the total length and compared with size and shape of the preys. The following characters were studied; length and width of the mouth; size of branchial arch; number and length of the gillrakers and distance between them.
    Description: Publisher permission
    Description: Published
    Description: Perciformes, Serranidae, Acanthistius brasilianus, mero, alimentación, sistema digestivo
    Keywords: Feeding ; Digestive system ; Feeding ; Digestive system
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 9
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    Aspectos biológico-pesqueros del abadejo (Genypterus blacodes) (2007)
    Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)
    Details
    Publication Date: 2021-05-19
    Description: 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.
    Description: Publisher permission
    Description: Published
    Description: Gadiformes, Ophidiidae, abadejo, relaciones tróficas, relaciones largo-peso, distribución por tamaño, distribución geográfica, cadena de alimentos, alimentación, estructura poblacional
    Keywords: Geographical distribution ; Population structure ; Feeding ; Food chains ; Geographical distribution ; Population structure ; Size distribution ; Feeding ; Length-weight relationships ; Food chains ; Trophic relationships
    Repository Name: AquaDocs
    Type: Journal Contribution
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