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JournalISSN: 0716-1069

Investigaciones Marinas 

About: Investigaciones Marinas is an academic journal. The journal publishes majorly in the area(s): Upwelling & Population. It has an ISSN identifier of 0716-1069. It is also open access. Over the lifetime, 303 publications have been published receiving 3120 citations.
Topics: Upwelling, Population, La Niña, Merluccius gayi, Bay


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Journal ArticleDOI
TL;DR: Se mencionan 243 especies de crustaceos decapodos en el Atlantico sudoccidental, entre los 25o y los 55°S, pertenecientes a 49 familias, y se resumen los datos referidos a the distribucion geografica, ciclos de vida e importancia economica of las esPEcies de the region.
Abstract: Se mencionan 243 especies de crustaceos decapodos en el Atlantico sudoccidental, entre los 25o y los 55°S, pertenecientes a 49 familias. El suborden Dendrobranchiata incluye 6 familias con 23 especies. El suborden Pleocyemata consta de 10 familias con 35 especies de Caridea, 1 familia con 2 especies de Astacidea, 1 familia con 1 especie de Palinura, 2 familias con 7 especies de Thalassinidea, 8 familias con 44 especies de Anomura y 21 familias con 131 especies de Brachyura. En la region templado calida del Atlantico sudoccidental se han registrado 200 especies; el 73% de las mismas se extienden hacia el norte de la region en estudio ("especies tropicales"), el 27% habitan entre las latitudes de Rio de Janeiro y Tierra del Fuego. De estas, 44 son endemicas. El numero de especies tropicales disminuye con el aumento de la latitud, aunque con diferentes patrones en distintas familias; la expansion hacia el sur parece estar limitada por cambios ambientales entre los 29°-35°S, principalmente el descenso de la temperatura invernal y el efecto del Rio de la Plata. La region templado-fria incluye 39 especies, 24 de las cuales habitan tambien el Pacifico sur. Muchas especies templado-frias (50%) alcanzan latitudes menores a 42°S en aguas profundas del Atlantico. Se resumen los datos referidos a la distribucion geografica, ciclos de vida e importancia economica de las especies de la region. El numero de especies y familias es similar al que se encuentra en las costas del Pacifico, entre las mismas latitudes, pero existen diferencias en la composicion faunistica

90 citations

Journal ArticleDOI
TL;DR: In this article, environmental aspects and decapod fauna of several estuaries and coastal lagoons in the southwestern Atlantic, between 25 and 41°S, are compared: Baia de Paranagua, Manguezal de Itacorubi, Lagoa dos Patos (Brasil), Laguna Castillos, Rio de la Plata (Uruguay-Argentina).
Abstract: Environmental aspects and the decapod fauna of several estuaries and coastal lagoons in the southwestern Atlantic, between 25 and 41°S, are compared: Baia de Paranagua, Manguezal de Itacorubi, Lagoa dos Patos (Brasil), Laguna Castillos (Uruguay), Rio de la Plata (Uruguay-Argentina), Laguna Mar Chiquita and Bahia Blanca (Argentina). The information about natural history of crab species (Crustacea: Brachyura) from these estuarine systems is reviewed. The number of crab species falls dramatically between Itacorubi and Lagoa dos Patos, together with a fall in minimum water temperature. Low winter temperatures may affect physiological processes of many species and are related to the disappearance of mangroves, and the variety of microhabitat generated by them. However, temperature alone cannot explain several features of species distribution and life history.

78 citations

Journal ArticleDOI
TL;DR: In this paper, a conceptual model relating the generation and breakdown of the shadow to the bifurcated upwelling occurring outside the bay is proposed, and its dynamics at Mejillones Bay, in the northern Chilean coast, using satellite images and in situ current data.
Abstract: Upwelling shadows are high temperature regions within coastal upwelling systems. In this article its dynamics is described at Mejillones Bay, in the northern Chilean coast, using satellite images and in situ current data. A conceptual model relating the generation and breakdown of the shadow to the bifurcated upwelling occurring outside the bay is proposed.

65 citations

Journal ArticleDOI
TL;DR: In the Beagle Channel, Argentina, the individuals of two sympatric species of lithodids occur simultaneously in commercial traps: the southern king crab, Lithodes santolla and the false southern king Crab, Paralomis granulosa, which is a mixed fishery.
Abstract: In the Beagle Channel, Argentina (55oS; 66oW) the individuals of two sympatric species of lithodids occur simultaneously in commercial traps: the southern king crab, Lithodes santolla and the false southern king crab, Paralomis granulosa. Hence, this is a mixed fishery. Both species differ markedly in their reproductive potential and therefore, if overexploited, time for stock rebuilding also differs between the species. L. santolla is large (maximum size of 180 mm carapace length, Cl, and 6 kg weight), has a generation time of 6 y, the reproductive cycle is annual and females carry between 5,000-32,000 eggs per female per clutch. P. granulosa is smaller than its cogener (maximum 115 mm Cl and 1.5 kg weight), has a generation time of 12 y, the reproductive cycle is biennial and females carry between 800-10,000 eggs per female per clutch. In the Beagle Channel near the city of Ushuaia, L. santolla population was over-exploited, mainly due to the extraction of larger animals, irrespective of the sex. In the period 1975-1994, the deacrese of: the yield per trap, the average mean size of trapped individuals, the frequency of ovigerous females, and the constant sex-ratio, evidenced the extraction of all marketable animals from the population. Therefore, in 1994, the fishing for L. santolla was closed to allow the population to recover to acceptable commercial and biological levels. For P. granulosa, it is suggested that its life-history traits constrains fishing to low rates, since its recuperation potential is lower than that of L. santolla.

62 citations

Journal ArticleDOI
TL;DR: Las resultados indican that todas las especies son carnivoras con comportamientos troficos carcinofagos e ictiofagos principalmente en las dos primeras espe species de peces, con Rhynchocynetes typus como presa principal y moluscos gastropodos, poliquetos y equinodermos in las otras espescies.
Abstract: RESUMEN. Se analiza la alimentacion y relaciones troficas de especies icticas de la zona costera del norte de Chile considerando la importancia relativa de las presas, diversidad y sobreposicion trofica interespecifica. Se capturo un total de 632 ejemplares con arpon mediante buceo apnea de mayo de 1998 a mayo de 1999. Se colecto 16 especies aunque solo ocho fueron consideradas en los analisis por su mayor frecuencia en las capturas. Estas especies fueron Paralabrax humeralis, Hemilutjanus macrophthalmos, Cheilodactylus variegatus, Pinguipes chilensis, Anisotremus scapularis, Acanthistius pictus, Semicossyphus maculatus y Oplegnathus insignis. Los resultados indican que todas las especies son carnivoras con comportamientos troficos carcinofagos e ictiofagos principalmente en las dos primeras especies de peces, con Rhynchocynetes typus como presa principal y moluscos gastropodos, poliquetos y equinodermos en las otras especies. La mayoria presenta tendencia a la eurifagia, con excepcion de S. maculatus y O. insignis. Las interacciones troficas entre especies muestran baja sobreposicion dietaria al nivel de similitud promedio de un 30%, indicando que estas especies serian generalistas en sus habitos troficos pudiendo cambiar sus estrategias alimentarias evitando asi la competencia por los recursos presas. Palabras claves: alimentacion, relaciones troficas, peces costeros, norte de Chile. Feeding and trophics relationships of coastal fish off northern Chile

59 citations

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Performance
Metrics
No. of papers from the Journal in previous years
YearPapers
200726
200638
200521
200424
200320
200271