1) La descarga del recurso depende de la página de origen
2) Para poder descargar el recurso, es necesario ser usuario registrado en Universia

Opción 1: Descargar recurso

Detalles del recurso


Funka Bay is the main nursery ground of the Japanese Pacific population of walleye pollock Gadus chalcogrammus. To better understand how hydrographic and biological conditions are related to the survival of this population during the early life stages, hydrographic observations and field samplings have been conducted in Funka Bay since 1991 aboard the T/S Usio-Maru, Faculty of Fisheries, Hokkkaido University. Data have been collected on hydrographic conditions and the distributions of larval pollock and copepod nauplii(larval prey). The year class strength estimated by tuning VPA calculation has fluctuated annually and strong year classes occurred in 1991,1994,1995, 2005, and 2007. In these years, the Tsugaru Warm Water(TWW,>6℃, salinity>33.6) distributed in late January in Funka Bay and the Oyashio Cold Water(OCW,<3.0℃, salinity 33.0-33.3)entered the bay after mid February. In contrast, the recruitment failure was found in 2010,when cold water prevailed in early February in the bay due to early intrusion of OCW. From 1991 to 2013, walleye pollock larvae were mostly collected in late January. A positive relationship was found between the temperatures at 15 m depth in late January and the year class strength of the population(r=0.56, p=0.017). While no significant relationship was found between the density of copepod nauplii in late January and the year class strength(r=0.32, p=0.259). Previous studies have shown the feeding success of larval pollock is higher in TWW than in OCW. These results suggest that higher feeding success during the warmer years in late January in Funka Bay might have resulted in the strong year classes.

Pertenece a

Hokkaido University Collection of Scholarly and Academic Papers  


中谷, 敏邦 - 

Id.: 70901237

Idioma: japonés  - 

Versión: 1.0

Estado: Final

Palabras claveDecadal observation - 

Tipo de recurso: bulletin (article)  - 

Tipo de Interactividad: Expositivo

Nivel de Interactividad: muy bajo

Audiencia: Estudiante  -  Profesor  -  Autor  - 

Estructura: Atomic

Coste: no

Copyright: sí

Requerimientos técnicos:  Browser: Any - 

Fecha de contribución: 23-ene-2018


* 10.14943/mem.fish.59.1-2.19
* Memoirs of the Faculty of Fisheries Sciences, Hokkaido University, 59(1/2): 19-43

Otros recursos de la mismacolección

  1. Behavioral assay and chemical characters of female sex pheromones in the hermit crab Pagurus filholi Males of the hermit crab Pagurus filholi perform assessment behavior toward females, as a preliminar...
  2. Importance of patch size variation for the population persistence of a decapod crustacean in seagrass beds To understand the effects of patch attributes of seagrass beds on the persistence of an animal popul...
  3. An analysis of metabolic characteristics of planktonic heterotrophic protozoans Respiration rate data on 61 heterotrophic planktonic protozoans were compiled and analyzed as a func...
  4. Routine metabolic rates of pelagic marine fishes and cephalopods as a function of body mass, habitat temperature and habitat depth Cephalopods and fishes are major components of marine micronekton and nekton, so an understanding of...
  5. 深海性動物プランクトンの代謝活性(総説) Because of logistic difficulties and technical complexities, experimental study on the metabolism of...

Aviso de cookies: Usamos cookies propias y de terceros para mejorar nuestros servicios, para análisis estadístico y para mostrarle publicidad. Si continua navegando consideramos que acepta su uso en los términos establecidos en la Política de cookies.