Squid resource estimation model based on environment factors

An environmental factor and evaluation model technology, which is applied in the field of squid resource evaluation model based on environmental factors to reduce risks and improve accuracy and reliability.

Inactive Publication Date: 2016-12-21
SHANGHAI OCEAN UNIV
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Problems solved by technology

However, the influence of environmental factors has not been taken into account in the previous evaluation models of soft fish resources. Thes

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  • Squid resource estimation model based on environment factors
  • Squid resource estimation model based on environment factors
  • Squid resource estimation model based on environment factors

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Embodiment Construction

[0018] Factors affecting the replenishment of squid resources in the Northwest Pacific include the environment of the spawning ground and the environment of the feeding ground. The key influencing factor (S) of the spawning ground has an impact on the environmental capacity K, and the key influencing factor (F) of the feeding ground has an impact on the natural Influenced by the intrinsic growth rate r, the suitable water temperature range (P S ) and the suitable water temperature range for the bait farmers in each month during the bait hunting period (P F ), respectively characterize the changing trend of environmental holding capacity (K) of squid resources in the Northwest Pacific Ocean, and use P S , the change trend of the natural intrinsic growth rate (r), using the average Ps as the S index, the average P F As the F index (Table 1), three environmental factor-based EDSP models were constructed based on the basic Schaefer residual yield model:

[0019] Table 1 S and F ...

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Abstract

A squid resource assessment model based on environmental factors. According to the remaining yield model, the remaining yield model based on the environmental factors of the spawning ground is constructed: log(B t )|K,σ 2 =log(K)+u t l o g ( B t ) | B t - 1 , K , r , σ 2 = log { B t - 1 + rB t - 1 ( 1 - B t - 1 S t - 1 K ) - C t - 1 } + u t Remaining yield model based on forage field environmental factors: log(B t )|K,σ 2 =log(K)+u t l o g ( B t ) | B t - 1 , K , r , σ 2 = log { B t - 1 + F t - 1 rB t - 1 ( 1 - B t - 1 K ) - C t - 1 } + u t Residual yield model based on comprehensive environmental factors: log(B t )|K,σ 2 =log(K)+u t l o g ( B t ) | B t - 1 , K , r , σ 2 = log { B t - 1 + F t - 1 rB t - 1 ( 1 - B t - 1 S t - 1 K ) - C t - 1 } + u t where B t is the biomass in year t, K is the environmental capacity, r is the natural intrinsic growth rate, q is the capture coefficient, I t is CPUE for year t, u t , v t are independent of each other and have the same distribution as IID N(0, σ 2 ), σ is the CPUE standard deviation.

Description

technical field [0001] The invention relates to a squid resource assessment model, in particular to a squid resource assessment model based on environmental factors. Background technique [0002] Marine fishery resources are important renewable resources. Scientifically assessing the amount of resources and proposing reasonable management measures are conducive to the development and utilization of fishery resources. Usually, people use the fishery population dynamics model to describe the dynamic changes of the fishery population, and use the model data for fitting under an assumed error structure, so as to realize the estimation of the relevant parameters of the model and the situation of fishery resources. Forecasts are made to evaluate the impact of different management measures on fishery resources. [0003] There are many types of fishery resources, and species with different life history characteristics have different changes in the quantity of fishery resources, so ...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/02
CPCG06Q10/067G06Q50/02
Inventor 陈新军汪金涛金岳魏广恩陈洋洋李娜
Owner SHANGHAI OCEAN UNIV
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