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Ictioplancton y eufáusidos frente a la costa peruana durante el Otoño 2017

Authors: Aronés Flores, Katia; Pinedo, Elda; Nakazaki, Carmela;

Ictioplancton y eufáusidos frente a la costa peruana durante el Otoño 2017

Abstract

Entre el 27 de mayo y 14 de junio 2017 se efectuó el Crucero de Evaluación de la Población de Merluza y otros Demersales 1705-06, BIC Humboldt. Se recolectó 44 muestras de zooplancton utilizando red Hensen de 300 μm de abertura de malla, en arrastres verticales con el buque parado hasta 50 m de profundidad máxima. Los volúmenes de zooplancton fluctuaron entre 0,5 y 45,0 mL/muestra, los menores a 10 mL/muestra, se localizaron entre Puerto Pizarro y Mórrope, mientras que los mayores a 10 mL/muestra se distribuyeron principalmente en la zona oceánica, con núcleos costeros frente a Salaverry. Se determinaron 11 especies de eufáusidos, con mayores densidades en los estadios caliptopis y furcilias representando 51% y 34%, respectivamente de la abundancia total. En el ictioplancton se determinaron 40 especies, siendo las más frecuentes Diogenichthys laternatus (64%), Vinciguerria lucetia (43%) y Engraulis ringens (41%) en las muestras totales. La anchoveta (Engraulis ringens Jenyns) fue la más abundante (3 a 4.896 huevos/m² y 3 a 3.876 larvas/ m²) observándose núcleos importantes de huevos entre Chicama y Salaverry y de larvas frente a Pimentel. El pez luminoso (Vinciguerria lucetia (Garman)) presentó abundancias entre 9 a 1.728 huevos/m2 y de 3 a 63 larvas/m2, con mayores densidades frente Chicama y Punta Chao y, frente a Pimentel, respectivamente. Los huevos de sardina (Sardinops sagax (Jenyns)) presentaron abundancia total de 1.782 huevos/m2 en una estación frente a Puerto Pizarro, mientras que las larvas de merluza (Merluccius gayi peruanus Ginsburg), presentaron abundancias de 3 a 18 larvas/m2 y se distribuyeron frente a Los Órganos a 15 mn de Mórrope y Chicama.

ABSTRACT: May 27 and June 14, 2017, the Peruvian hake and other Demersal Stock Assessment Cruise 1705-06, R/V Humboldt, took place. A total of 44 zooplankton samples were collected using a 300 μm Hensen net, in vertical trawls with the vessel stationary up to a maximum depth of 50 m. The zooplankton volumes fluctuated between 0.5 and 45.0 mL/sample, those less than 10 mL/sample were located between Puerto Pizarro and Mórrope, while those greater than 10 mL/sample were distributed mainly in the oceanic zone, with coastal nuclei off Salaverry. A total of 11 euphausiid species were determined, with higher densities in the calyptopis and furcilias stages representing 51% and 34%, respectively, of the total abundance. In ichthyoplankton, 40 species were determined, the most frequent being Diogenichthys laternatus (64%), Vinciguerria lucetia (43%), and Engraulis ringens Jenyns (41%) in the total samples. The anchoveta (E. ringens) was the most abundant (3 to 4,896 eggs/m² and 3 to 3,876 larvae/m²) with important nuclei of eggs between Chicama and Salaverry and larvae off Pimentel. The Panama lightfish (Vinciguerria lucetia (Garman)) presented abundances between 9 to 1,728 eggs/m2 and from 3 to 63 larvae/m2, with higher densities off Chicama and Punta Chao and off Pimentel, respectively. Sardine eggs (Sardinops sagax (Jenyns)) had a total abundance of 1,782 eggs/m2 in a station off Puerto Pizarro, while Peruvian hake larvae (Merluccius gayi peruanus Ginsburg) had an abundance of 3 to 18 larva/m2 and were distributed off Los Órganos, at 15 nm from Mórrope and Chicama.

Country
Peru
Keywords

570, Ictioplancton, Pez luminoso, Merluza, Anchoveta, Eufáusidos

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
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Green