A bioeconomic model applied to a small pelagic species along the Moroccan coast

The Strait of Messina is located at the centre of the Mediterranean Sea and is considered a biodiversity hotspot and an obligatory seasonal passage for different pelagic species such as sharks, marine mammals, and billfishes. For the first time, in the Strait of Messina, our research group tagged a Mediterranean spearfish (Tetrapturus belone) using a pop-up satellite archival tag (PSAT). The observation of abiotic parameters (depth, light, and temperature) recorded by the PSAT confirmed that the tagged specimen was predated after about nine hours. The tag was then regurgitated 14 days after the tag deployment date. The analysis of collected data seems to indicate that the predator may be an ectothermic shark, most likely the bluntnose sixgill shark (Hexanchus griseus).

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Diet composition of round sardinella (Sardinella aurita) and flat sardinella (Sardinella maderensis) in the south of Atlantic Moroccan coast

Egyptian Journal of Aquatic Biology and Fisheries ◽

10.21608/ejabf.2020.119032 ◽

2020 ◽

Vol 24 (7) ◽

pp. 73-91

Author(s):

Ayoub Baali ◽

Khalil Chahdi Ouazzani ◽

Feirouz Touhami ◽

Ahmed El-Achi ◽

Khadija Amenzoui

Keyword(s):

Diet Composition ◽

The South ◽

Moroccan Coast ◽

Sardinella Aurita

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Latest Permian deep-water ostracods from southwestern Guangxi, South China

Journal of Micropalaeontology ◽

10.1144/jm.26.2.169 ◽

2007 ◽

Vol 26 (2) ◽

pp. 169-191 ◽

Cited By ~ 17

Author(s):

Aihua Yuan ◽

Sylvie Crasquin-Soleau ◽

Qinglai Feng ◽

Songzhu Gu

Keyword(s):

New Species ◽

South China ◽

Deep Water ◽

World Wide ◽

Pelagic Species ◽

Two New Species ◽

First World

Abstract. A very diverse ostracod fauna was discovered in the latest Permian strata of the Dongpan section, southwestern Guangxi, South China. Fifty-one species belonging to twenty-eight genera were identified and described, including two new species (Bairdia dongpanensis n. sp. and Spinomicrocheilinella anterocompressa n. sp). This type of assemblage, with nineteen palaeopsychrospheric species and four pelagic species, is the first world-wide deep-water ostracod fauna reported from the latest Permian strata and the first one recorded in the Permian of China. The palaeoenvironmental analysis allows one to propose an evaluation of the bathymetry variation along the Dongpan section.

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Fisheries: A Missing Link in Greenhouse Gas Emission Policies in South Korea

Sustainability ◽

10.3390/su13115858 ◽

2021 ◽

Vol 13 (11) ◽

pp. 5858

Author(s):

Kyumin Kim ◽

Do-Hoon Kim ◽

Yeonghye Kim

Keyword(s):

Greenhouse Gas ◽

Greenhouse Gas Emission ◽

Ghg Emissions ◽

Bioeconomic Model ◽

Negative Externalities ◽

Fishing Vessel ◽

Gas Emission ◽

Fishing Vessels ◽

The Government ◽

Different Levels

Recent studies demonstrate that fisheries are massive contributors to global greenhouse gas (GHG) emissions. The average Korean fishing vessel is old, fuel-inefficient, and creates a large volume of emissions. Yet, there is little research on how to address the GHG emissions in Korean fisheries. This study estimated the change in GHG emissions and emission costs at different levels of fishing operations using a steady-state bioeconomic model based on the case of the Anchovy Tow Net Fishery (ATNF) and the Large Purse Seine Fishery (LPSF). We conclude that reducing the fishing efforts of the ATNF and LPSF by 37% and 8% respectively would not only eliminate negative externalities on the anchovy and mackerel stock respectively, but also mitigate emissions and emission costs in the fishing industry. To limit emissions, we propose that the Korean government reduce fishing efforts through a vessel-buyback program and set an annual catch limit. Alternatively, the government should provide loans for modernizing old fishing vessels or a subsidy for installing emission abatement equipment to reduce the excessive emissions from Korean fisheries.

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