Top predator reveals the stability of prey community in the western subarctic Pacific

Egg development time and hatching success were determined for the oncaeid copepod, Triconia canadensis, from the mesopelagic zone of the western subarctic Pacific. The egg development time was estimated to be 74.7–84.5 days at in situ temperature (3°C), which is much longer than those reported previously on the other oncaeid copepods even if the differences in experimental temperatures are taken into account. The egg hatching success varied between 50 and 100%, with a grand mean of 88%. The newly hatched nauplii of T. canadensis were elongate ellipsoid in shape, and had many large-sized lipid droplets in their body. Possible adaptive significance of apparent longer egg developmment time of T. canadensis is discussed in the light of their life cycle strategy.

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Estimation of standing stock of chlorophylla and primary production from remote-sensed ocean color in the Oyashio region, the Western subarctic Pacific, during the spring bloom in 1997

Journal of Oceanography ◽

10.1007/bf02742454 ◽

1998 ◽

Vol 54 (5) ◽

pp. 527-537 ◽

Cited By ~ 30

Author(s):

Hiromi Kasai ◽

Hiroaki Saito ◽

Atsushi Tsuda

Keyword(s):

Primary Production ◽

Spring Bloom ◽

Ocean Color ◽

Standing Stock ◽

Subarctic Pacific ◽

Oyashio Region ◽

Western Subarctic Pacific

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Metabolism and chemical composition of zooplankton from 500 to 5,000 m depth of the western subarctic Pacific Ocean

Journal of Oceanography ◽

10.1007/s10872-012-0124-x ◽

2012 ◽

Vol 68 (5) ◽

pp. 641-649 ◽

Cited By ~ 8

Author(s):

Tsutomu Ikeda

Keyword(s):

Chemical Composition ◽

Pacific Ocean ◽

Subarctic Pacific ◽

Western Subarctic Pacific ◽

Subarctic Pacific Ocean

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Functional roles of interzonal migrating mesozooplankton in the western subarctic Pacific

Progress In Oceanography ◽

10.1016/s0079-6611(03)00102-2 ◽

2003 ◽

Vol 57 (3-4) ◽

pp. 279-298 ◽

Cited By ~ 92

Author(s):

Toru Kobari ◽

Akiyoshi Shinada ◽

Atsushi Tsuda

Keyword(s):

Subarctic Pacific ◽

Functional Roles ◽

Western Subarctic Pacific

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Growth stimulation and inhibition of natural phytoplankton communities by model organic ligands in the western subarctic Pacific

Journal of Oceanography ◽

10.1007/s10872-012-0160-6 ◽

2012 ◽

Vol 69 (1) ◽

pp. 97-115 ◽

Cited By ~ 3

Author(s):

Yoshiko Kondo ◽

Shigenobu Takeda ◽

Jun Nishioka ◽

Mitsuhide Sato ◽

Hiroaki Saito ◽

...

Keyword(s):

Growth Stimulation ◽

Organic Ligands ◽

Subarctic Pacific ◽

Western Subarctic Pacific ◽

Phytoplankton Communities ◽

Natural Phytoplankton

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The Impact of Price on the Profits of Fishermen Exploiting Tritrophic Prey-Predator Fish Populations

International Journal of Differential Equations ◽

10.1155/2018/2381483 ◽

2018 ◽

Vol 2018 ◽

pp. 1-13 ◽

Cited By ~ 2

Author(s):

Meriem Bentounsi ◽

Imane Agmour ◽

Naceur Achtaich ◽

Youssef El Foutayeni

Keyword(s):

Equilibrium Points ◽

Price Change ◽

Fishing Effort ◽

Fish Populations ◽

Bioeconomic Model ◽

Top Predator ◽

Nash Equilibrium Problem ◽

Change Mechanism ◽

The Stability ◽

The Impact

We define and study a tritrophic bioeconomic model of Lotka-Volterra with a prey, middle predator, and top predator populations. These fish populations are exploited by two fishermen. We study the existence and the stability of the equilibrium points by using eigenvalues analysis and Routh-Hurwitz criterion. We determine the equilibrium point that maximizes the profit of each fisherman by solving the Nash equilibrium problem. Finally, following some numerical simulations, we observe that if the price varies, then the profit behavior of each fisherman will be changed; also, we conclude that the price change mechanism improves the fishing effort of the fishermen.

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