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Life History Parameters and Fishing Aspects of the Alien Nimble Spray Crab IPercnon gibbesi/I in a Native Area of the Central-East Atlantic
We investigated the status and population structure of Percnon gibbesi in three areas of the island of Gran Canaria (Canary Islands, Central-East Atlantic) between July 2020 and December 2021. A total of 999 individuals were captured. Monthly sampling allowed us to establish the reproductive season according to the presence of ovigerous females. The methodology and number of individuals analysed were suitable for establishing the length-weight relationships and the life history parameters via modal progression analysis. The analysis of the catches per unit effort (CPUE) revealed the abundance of Percnon gibbesi in the three areas and seems to not conform with the catch quotas established in the Canary Islands Fisheries Law. Percnon gibbesi is a native crab species characteristic of intertidal and subtidal zones of the Atlantic coast of the European Macaronesian archipelagos (Azores, Madeira, and Canary Islands), and probably also in the neighbouring rocky coasts of northwest Africa. P. gibbesi is considered an invasive alien species in almost all of the Mediterranean, with expanding populations from Spain to Turkey, including Libya; However, its biology and ecology are highly unknown, despite all its range of distribution. In the intertidal zones of Gran Canaria Island, this crab, in the intertidal zones of Gran Canaria Island, shows a carapace length range between 4.1 and 22.7 mm (4.1-22.7 in males and 5.7-22.3 in females), where females showed higher weights and lengths than males on average; However, males predominated in all samples, with a sex ratio of 1:0.57. The L[sub.∞] for this crab was estimated to be 27 ± 3 mm (23 ± 4 mm for females and 25 ± 4 mm for males). The growth coefficient (K) was 0.24 year[sup.−1], the total mortality (Z) was Z = 1.71 year[sup.−1], and the natural mortality (M) was 0.47 year[sup.−1] [sub..] Although females grow faster than males, males are more abundant in the larger length classes. Although the presence of ovigerous females indicated that reproduction takes place twice a year, from March to April and from August to September, the number of cohorts detected by the modal progression analysis showed that reproduction takes place all year.
Journal Article
Evaluate the Biomass of IFenneropenaeus chinensis/I from the Southern Coast of Shandong Peninsula Using eDNA
Fenneropenaeus chinensis is an important economic species in the north of China, and plays an important role in both marine fishing and aquaculture. Long-term overfishing has led to the rapid decline of wild F. chinensis resources. The traditional trawl survey could not meet the demands of the F. chinensis resource survey. In this study, environmental DNA (eDNA) technology was used to evaluate the biomass of F. chinensis in the traditional Qinghai (Qingdao Haiyang) fishing ground in the southern sea area of the Shandong Peninsula, with the purpose of verifying whether eDNA technology can provide a new resource assessment method for fisheries resource species such as F. chinensis. The eDNA quantitative results of the Qingdao water samples ranged from 1972 copies/L to 6937 copies/L, with an average of 4366 ±1691 copies/L. Those in Haiyang water samples ranged from 4795 copies/L to 8715 copies/L, with an average of 6737 ± 1348 copies/L. The concentration of eDNA in shrimp culture ponds ranged from 1.14 × 10[sup.6] copies/L to 7.61 × 10[sup.6] copies/L, with an average of 3.33 × 10[sup.6] ± 2.28 × 10[sup.6] copies/L. The amount of eDNA released by each gram of F. chinensis per 24 h was about 2.91 × 10[sup.6] copies. According to this calculation, it was estimated that the distribution of F. chinensis was about one shrimp in every 300 m[sup.2] sea area. Similarly, it is estimated that one shrimp is distributed every 240 m[sup.2] in the Haiyang sea area. The result of this study confirms the feasibility of using eDNA to evaluate the biomass of shrimps.
Journal Article
Fisherman's bible : the world's most comprehensive angling reference
Freshwater and saltwater gear ; photos, specifications, and up-to-date prices ; hundreds of rods, reels, lures, and lines ; details on the newest tackle on the market--in color ; informative features on getting started and fishing trends ; and much more.
Book
Entidades de economía social para apoyar la pesca a pequeña escala desde la perspectiva de los fondos Next Generation: algunos casos de éxito
El año 2022 es el Año Internacional de la Pesca y la Acuicultura Artesanales. La elección de este momento pretende proporcionar un hito importante para evaluar el progreso hacia la meta de \"apoyar la pesca a pequeña escala\" y compartir buenas prácticas en todo el mundo. Sin embargo, la medición de esta meta puede resultar francamente difícil, por lo que conviene comenzar por reconocer la indudable importancia de este tipo de pesca y seleccionar los interlocutores válidos en la materia de cara a poder implementar un plan de acción válido. El momento resulta coincidente con las convocatorias en diversos países de la UE con cargo a Fondos Next Generation, que pueden contribuir a la modernización y transformación del sector, por lo que se analizan los PERTE más adecuados para el caso de España.
Journal Article
The complete fishing manual
Explains the basics of fishing, including equipment, types of lure to use in freshwater or saltwater, different varieties of fish, and places to fish around the world.
Book
