Browsing Artículos Científicos by Issue Date
Now showing items 1-20 of 1676
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Effects of sessile Protozoa on intracapsular oxygen tension and embryonic shell calcification in the muricid Chorus giganteus
(2000)Clusters of egg capsules deposited by some common marine Mollusca may suffer problems of a low diffusive oxygen supply to the embryos they contain, especially if the capsules are exposed to hypoxic seawater or attachment ... -
Genetic differentiation of Merluccius gayi gayi and Merluccius gayi peruanus (Pisces, Merlucciidae) and paleogeographic antecedent of their distribution area
(2000)Se han planteado variadas hipótesis sobre relaciones taxonómicas entre las especies de Merluccius, proponiéndose la existencia de dos subespecies Merluccuis gayi gayi y Merluccius gayi peruanus en el Pacífico Sureste; ... -
Pseudoterranova cattani sp. nov. (Ascaridoidea: Anisakidae), a parasite of the South American sea lion Otaria byronia De Blainville from Chile Pseudoterranova cattani sp. nov. (Ascaridoidea: Anisakidae), un parásito del lobo marino común Otaria byronia De Blainville en Chile
(2000)The parasitic nematode Pseudoterranova cattani sp. nov. is described from the stomach of the South American sea lion Otaria byronia De Blainville, sampled along the coastline off central-south Chile, between 1980 and 1997. ... -
Differential infectivity of Caligus flexispina (Copepoda, Caligidae) in three farmed salmonids in Chile
(2000)The ectoparasitic copepod, Caligus flexispina, is causing increasing problems in farmed salmonids in southern Chile. Field and experimental approaches were used to assess whether any of the three host species, rainbow trout ... -
Dynamical assessment of the accretionary record in the shell of the mussel Semimytilus algosus from a rocky shore in Chile
(2000)Patterns of tidal microgrowth bands present in acetate peels of shell sections of the Chilean mussel Semimytilus algosus from three tidal levels on a wave-exposed shore were analyzed for the presence of recurring periodicities ... -
Geographical variations in the jack mackerel, Trachurus symmetricus murphyi populations in the southeastern Pacific ocean as evidenced from the associated parasite communities
(2000)The composition of the metazoan parasite communities within 2 fishing zones along the Chilean coast were compared to determine the population structure of the jack mackerel Trachurus symmetricus murphyi (Nichols) in these ... -
Impaired Health in Flounder, Paralichthys spp. Inhabiting Coastal Chile
(2000)Prolonged exposure of fish to a variety of pollutants can induce stress (Adams 1990). These include municipal effluent, PCBs, pesticides, polycyclic aromatic hydrocarbons (PAHs), heavy metals in mine tailings, ... -
Patrones de forrajeo en dos especies de peces intermareales herbívoros de las costas de Chile: Efecto de la abundancia y composición química del alimento
(2000)Los peces herbívoros son organismos que deben suplir los requerimientos de su economía energética a partir de una fuente de alimento con un bajo contenido de nutrientes y energía. Dos de las interrogantes más importantes ... -
Efecto del parasitismo del isópodo bopírido Ionella agassizi (Isopoda: Epicaridea) sobre la fisiología nutricional del nape Neotrypaea uncinata (Decapoda: Thalassinidea)
(2000)El nape Neotrypaea uncinata se encuentra parasitado en sus branquias por el isópodo Ionella agassizi. Trabajos anteriores han señalado que I. agassizi provoca un efecto negativo en la biología reproductiva del nape, afectando ... -
Patrones de abundancia, composición trófica y distribución espacial del ensamble de peces intermareales de la zona centro-sur de Chile
(2000)En las costas de la zona centro-sur de Chile se han realizado una serie de estudios relacionados con la biología de los peces pelágicos de importancia económica. Por el contrario, el conocimiento acerca de los peces litorales ... -
Evolution in Chile: natural drift versus natural selection, or the preservation of favoured theories in the struggle for knowledge
(2000)Chilean biology covers a wide disciplinary spectrum, where evolutionary biology has been able to gain an outstanding presence, despite its notably small number of practitioners. In this regard, however, numbers may appear ... -
The period function in a class of quadratic kolmogoroff systems.
(2000)In this paper we consider the family of quadratic Kolmogoroff systems with a center in the real quadrant: (:x=x(1ÄxÄay):y=y(Ä1 +ax+y), where 1< a <1: This system has three invariant lines (the coordinate axes and the line ... -
Gain of regularity for an nonlinear dispersive equation korteweg - de vries-burgers type
(2000)In this papers we study smoothness properties of solutions. We consider the equation of Korteweg - de Vries - Burgers type:(1)öut+@xf(u)=è @2xuÄé @3xu(x;0) ='(x) with Ä1< x <+1andt >0: The flux f=f(u)is a given smooth ... -
Effect of the coordination of the superficial site in the monomer–dimer reaction on a disordered substrate
(2000)Using Monte Carlo simulation experiments, a study is made of the effect of the superficial coordination number in a square lattice of sites for the monomer–dimer surface reaction (Ziff, Gulari and Barshad model) in the ... -
Toxicity response of Emerita analoga (Stimpson, 1857) collected from beaches of South Central Chile
(2000)The article cites a study which reports on toxicity response of Emerita analoga collected from beaches of South Central Chile. Emerita analoga is an abundant decapod crustacean frequently encountered along the Pacific ... -
Biogeografía marina de Chile continental Marine biogeography of continental Chile
(2001)Por casi un siglo, varios autores han analizado los patrones de distribución de la fauna y flora marina del Pacífico de Sudamérica y de la costa de Chile en particular, con el propósito de establecer el número de las ... -
Differential Precocious Sexual Development of Proctoeces lintoni (Digenea: Fellodistomidae) in Three Sympatric Species of Keyhole Limpets Fissurella Spp. May Affect Transmission to the Final Host
(2001)The prevalence, abundance, and developmental status of the digenetic trematode Proctoeces lintoni Siddiqui et Cable 1960 were compared in 3 species of keyhole limpets Fissurella. A total of 197 limpets was collected at ... -
Pseudascarophis genypteri n. sp (Nematoda: Cystidicolidae) parasite from the red ling Genypterus chilensis off Chile
(2001)A new nematode belonging to the Cystidicolidae is described, Pseudascarophis genypteri n. sp. was found in the intestine of the red ling Genypterus chilensis, sampled off Talcahuano, Chile. It is distinguished from Ascarophis ... -
Variación entre años de las infracomunidades de parásitos metazoos de la corvina Cilus gilberti (Pisces: Sciaenidae) en Chile
(2001)Se comparan la composición, riqueza, diversidad, abundancia y dominancia en las infracomunidades de parásitos metazoos de 86 ejemplares de corvina Cilus gilberti (Abbott 1889), recolectados en dos muestras tomadas con 15 ... -
Cryptobia neghmei sp. n. (Protozoa: Kinetoplastida) in two species of flounder, Paralichthys spp. (Pisces: Paralichthydae) off Chile
(2001)Cryptobia neghmei sp.n. is described from the blood of two species of flounder, Paralichthys microps and P. adspersus, inhabiting the Chilean coast in the southern Pacific Ocean. Flagellates were elongate, slender, with ...