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Ecological niche model-based method for evaluating habitat of Thunnus obesus in pacific sea area

A habitat and tuna technology, applied in character and pattern recognition, instruments, data processing applications, etc., can solve problems such as differences in evaluation results, and achieve the effects of good versatility, strong pertinence and initiative

Pending Publication Date: 2020-08-25
SHANGHAI OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Although the latest walleye stock assessment results, although optimistic, vary widely depending on the growth curve and area structure used, it is still possible to consider them overfished

Method used

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  • Ecological niche model-based method for evaluating habitat of Thunnus obesus in pacific sea area
  • Ecological niche model-based method for evaluating habitat of Thunnus obesus in pacific sea area
  • Ecological niche model-based method for evaluating habitat of Thunnus obesus in pacific sea area

Examples

Experimental program
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Embodiment

[0023] Example: such as figure 1 Shown, the embodiment of the present invention comprises a kind of Pacific sea area bigeye tuna habitat assessment method based on ecological niche model, and it comprises the following steps:

[0024] (S1) Obtain surface environmental factor data, ambient temperature data, and oxygen content data of the sea area to be evaluated; the surface environmental factor data includes sea surface temperature anomalies, sea surface heights, and sea surface chlorophyll concentrations.

[0025] (S2) Bring the surface environmental factor data, ambient temperature data and oxygen content data of the sea area to be evaluated into the corresponding scoring mapping function to obtain the score SSTA of sea surface temperature anomalies level , Sea surface height value scoring SSH level , the score CHL of sea surface chlorophyll concentration level , the score T of the ambient temperature range0 and the scoring DO for oxygen content 0 / 1 . Among them, T ran...

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Abstract

The invention discloses an ecological niche model-based method for evaluating a habitat of Thunnus obesus in a pacific sea area. The method includes: respectively substituting the surface environmentfactor data, the environment temperature data and the oxygen content data of the sea area to be evaluated into corresponding score mapping functions; obtaining a score SSTAlevel of the sea surface temperature range mean value, a score SSHlevel of the sea surface height value, a score CHLlevel of the sea surface chlorophyll concentration, a score Trange0 of the environment temperature and a score DO0 / 1 of the oxygen content; multiplying the scores to obtain a comprehensive habitat quality score. The selection of various parameter characteristics adopted in the method is more matched with the habit of the big-eye tuna, and the habit of an animal is not changed generally, so that compared with a model based on statistics, the model has better universality in time and space directions, and canbe suitable for evaluating the big-eye tuna in other areas and other times.

Description

technical field [0001] The invention relates to the field of fisheries, in particular to a habitat assessment method for bigeye tuna in the Pacific Ocean based on an ecological niche model. Background technique [0002] Bigeye tuna (Thunnusobesus) is a target species of tropical longline fisheries in the Pacific Ocean, with an annual catch of about 100,000 tonnes, mainly destined for high-quality fresh and frozen tuna markets in Asia, North America and elsewhere. Bigeye tuna is also caught in seine fisheries in the Pacific region. In the Western Pacific, about 5 percent is caught, while in the Eastern Pacific it is 10 percent. Annual catches typically exceed 120,000 tonnes, and the number of floating artificial fish aggregation devices used in the Pacific purse seine fishery has increased significantly since the mid-1990s. [0003] Although the latest walleye stock assessment results, although optimistic, vary widely depending on the growth curve and area structure used, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/02G06Q10/06G06K9/62
CPCG06Q50/02G06Q10/06393G06F18/231
Inventor 周成王禹程许柳雄万荣王学昉
Owner SHANGHAI OCEAN UNIV