The study was conducted in the coastal waters of Bolong, Zamboanga City, Philippines purposely to determine the spatial distribution of Sepioteuthis lessoniana in relation to the depth of water and temporal distribution in relation to lunar phase using size composition and catch per unit effort (CPUE) data. Two sampling stations were established, namely, shallow-water station (Station 1) and deep-water station (Stations 2). Twenty units of squid traps were utilized in the study; ten of which were set in Station 1 and the other ten in Station 2. The traps were constructed using bamboo and green polyethylene netting. Instead of bait, coconut spikelet was placed inside the trap to lure squids. A motorized banca was used to set and haul the traps in the two sampling stations. Although hauling was done daily, sampling is scheduled only 12 times a month with three samplings per lunar phase. Catches were segregated according to sampling stations and lunar phases. Results of the study revealed that the squids caught in deeper waters were significantly larger than those caught in shallow waters, and that females dominated the shallow waters while males dominated the deeper waters. Furthermore, the catch during Full Moon was significantly higher than the catch of the other three lunar phases (p<0.05) with highest CPUE recorded in Station 2 during Full Moon (0.352 kg trap-1 day-1).

In this study, the water quality of four coastal areas in Puerto Princesa Bay, with and without informal settlers, were compared in terms of the phytoplankton composition and density, fecal coliform and physicochemical parameters during a 12-month sampling period. Microscopic examination and identification using phytoplankton monographs showed five harmful algal blooms (HABs) genera (Alexandrium, Dinophysis, Nitzschia, Pseudo-nitzschia, and Pyrodinium) with Dinophysis spp. as the most abundant in coastal areas with informal settlers and Pseudo-nitzschia spp. in areas without informal settlers. Eight phytoplankton genera (Coscinodiscus, Proboscia, Rhizosolenia, Skeletonema, Ceratium, Prorocentrum, Protoperidinium, and Oscillatoria) reported to have caused algal blooms were also observed with Coscinodiscus spp. as the most abundant in both groups of coastal areas. Multiple-tube fermentation technique showed fecal coliform count ranging from 4 to >1600 most probable number (MPN)/100 ml in the coastal areas with informal settlers and from <1.8 to 295 MPN/100 ml in areas without informal settlers. Multiprobe measurements showed that both groups of coastal areas have similar physicochemical characteristics with only the dissolved oxygen failing to meet the Philippine standards for class SB waters. There was a significant difference (P < 0.05) in water quality between the coastal areas with and without informal settlers in terms of fecal coliform and the density of four phytoplankton genera (Pseudo-nitzschia, Skeletonema, Alexandrium and Ceratium). However, there is no significant difference in terms of the physicochemical parameters. Regression analysis indicates that the presence of informal settlers could affect water quality in terms of fecal coliform and the five phytoplankton genera (Coscinodiscus, Pseudo-nitzschia, Skeletonema, Alexandrium and Ceratium).

Afin d’avoir une idée concrète sur la consommation et l’état de connaissance des produits de l’aquaculture et des espèces continentales en Algérie, une enquête a été menée en 2023 auprès de 220 personnes, représentatives de la population algérienne. L’enquête de satisfaction a été faite directement auprès des répondants et en ligne via un formulaire en utilisant Google Formes. Les répondants ont été interrogés par rapport à leurs consommations du poisson et par rapport à leurs connaissances des produis de la pêche et de l’aquaculture. Les résultats de l’enquête ont été traduits en utilisant l’outil Excel 2016. L'étude a montré que la consommation de poisson en Algérie est faible, principalement à cause du prix élevé, de la faible disponibilité du poisson d'eau douce et d'aquaculture et du manque de sensibilisation aux bienfaits du poisson et des produits d’élevage. La consommation de poisson est fortement saisonnière, avec une dominance en été due à la disponibilité et au prix plus bas du poisson. Les espèces les plus consommées sont les poissons pélagiques, comme la sardine et les anchois. Concernant le prix des poissons, 81% des répondants trouvent le prix très élevé contre 17,2% qui trouvent le prix des poissons abordable. Selon les répondants, la consommation des poissons est liée à la disponibilité sur le marché et le prix de vente. La consommation des poissons d'eau douce et de l'aquaculture est encore faible, avec la dominance du tilapia pour les poissons d’élevage d’eau douce et la daurade pour les poissons marins. Pour améliorer la situation, il faudrait réduire le prix du poisson, augmenter la production de poisson d'eau douce et d'aquaculture et sensibiliser les consommateurs aux avantages du poisson.

Catfishes are the crucial group in order Siluriformes occupy upper trophic levels due to their predatory feeding habits. This study examines the length-weight relationships of selected catfish species including Bagarius bagarius, Ompok bimaculatus, Heteropneustes fossilis, and Clupisoma garua collected from downstream Lloyds Barrage to upstream GM Barrage (Kotri Barrage) in the Indus River, Sindh, Pakistan. Fish samples were obtained over a year (July 2017 - June 2018) with the help of local fishermen and analyzed at the University of Sindh, Jamshoro. Measurements were taken using a digital balance, and regression analysis was performed using the cube law formula. The study found the regression parameters b and R² for B. bagarius (2.71 and 0.98), O. bimaculatus (2.82 and 0.94), H. fossilis (2.95 and 0.98), and C. garua (3.016 and 0.99). The "b" values suggested isometric growth for C. garua, while the other species indicated negative allometric growth. These values fall within the range (2.5-3.5), supporting the suitable growth of H. fossilis in the Indus River. This research provides vital baseline data for fisheries scientists, enhancing future studies and management strategies for these catfish species.

Located in the northernmost part of Türkiye and situated on the Boztepe Peninsula, Sinop has a surface area of 5.791 km2. Sinop is one of the smallest provinces of Türkiye and covers approximately 0.8 percent of Türkiye's surface area. Sinop Province is one of the regions with the highest fish outflow in the southern Black Sea coast of Türkiye where the most intensive fishing is carried out. There are many fish meal-oil factories, aquaculture processing and utilisation facilities and cold storages in Sinop due to intensive fishing and production. Due to the potential of Sinop's fisheries, the biggest export income is also provided from here. There are also dam lakes with large water surface area in Sinop Province. An intensive amount of aquaculture is carried out from these dam lakes. In addition, Sinop coasts are seen as the most suitable conditions in the Black Sea Region as a new and strong alternative attraction centre for aquaculture facilities. Especially after 2018, serious aquaculture activities are carried out on the east coast of Sinop and there are many project applications for new potential areas on the west coast of Sinop. Anchovy, Atlantic bonito, horse mackerel, whiting, bluefish, flathead grey mullet, red mullet, shad, garfish, and turbot are among the most fished economic species on the coasts of Sinop. In the inland waters of Sinop, the most caught fish species are carp and pike. The only species produced in the inland waters of Sinop is rainbow trout. The production of trout as trade name Turkish Salmon started in 2018 on the coasts of Sinop and continues and peaked in 2022 with 17,332,975 kg. Exported to 48 countries, Turkish Salmon was 45,548,737 kg in January-November 2022 and this rate increased to 57,211,587 kg with a 26% change in January-November 2023. Sea bass was only farmed in cages on the coasts of Sinop in 2019 and 2020. Except for 2021, veined Rapa whelk have been caught from the coasts of Sinop for the last 10 years. Veined Rapa whelk meat is exported to USA, Korea, China, Japan, Taiwan, and Singapore. Operculum of veined Rapa whelk is exported to S. Arabia and Libya countries. Sand mussel from the Sinop coasts was caught only in 2022. With the newly planned marine aquaculture capacities on the coasts of Sinop, its contribution to Turkish aquaculture production continues to increase. This table shows that Sinop is one of the leading provinces of Türkiye in terms of aquaculture processing facilities.

Present study evaluated the survival, post-larvae quality, and the population of Penaeus monodon (Black tiger shrimp) and Oreochromis niloticus (Tilapia), after the addition of two strains of bacteria i.e Lactobacillus sp. and Bacillus sp. The Vibrio harveyi were isolated and identified from hatchery-reared larvae, at Biotechnology Research Department Ministry of Education, Republic of Union of Myanmar. Preliminary screening for antimicrobial activity of six Lactobacillus sp. and six Bacillus sp. Incubated and tested with V. harveyi using agar, well diffusion assay and tube screening methods. Inhibition activity results were the best at 3 days incubation for Lactobacillus sp. and the optimal result for inhibition activity for Bacillus megaterium at 5 days, with lactose sugar on V. harveyi. Before in vivo test, in vitro inhibition test of V. harveyi competition with probiotic of different concentrations of 10 ml/ton, 20 ml/ton, 30 ml/ton and 40 ml/ton. The results in all probiotic treatments were almost similar. Inhibitory affects were found in tube screening method, where, V. harveyi level reduced to 10 3 CFU/ml from 10 7 CFU/mlin 4 days. The pathogenicity test was conducted for a period of 2 days with Penaeus monodon (Black tiger shrimp) at post larval stages and Oreochromis niloticus (Tilapia) at fingerling stages, where they were exposed for 106, 107 and 108 CFU/ml of V. harveyi resulted 100% mortality. The probiotic treatment exhibited 50%, 70% and 80% survival rate of the fish infected with 106, 107 and 108 CFU/ml, respectively. It was detected the lower load of Vibrio ssp. bacteria with potential of pathogenicity after feeding with six Lactobacillus sp. and six Bacillus sp.

The increasing use of mercury in the industrial sector poses significant risks to freshwater ecosystems and aquatic organisms. Milkfish (Chanos chanos), a widely consumed species, is now being reared in freshwater environments, raising concerns about mercury bioaccumulation and food safety. This study aimed to determine the median lethal mercury concentration for milkfish at 96 hours (LC50) in freshwater using an experimental approach and probit analysis. Five mercury concentrations were tested: 0 (control), 0 .110 mg Hg/L, 0.195 mg Hg/L, 0.347 mg Hg/L, and 0.618 mg Hg/L. The results indicated that mercury is highly toxic to milkfish, with a 96-hour LC50 of 0.147 mg Hg/L. Clinical symptoms observed included loss of reflex movements, irregular swimming, frequent surfacing with widened mouth and operculum openings, convulsions, and ventilation of the ram before mortality. These findings highlight the acute toxicity of mercury in freshwater milkfish and underscore the potential health risks associated with mercury contamination in aquaculture systems.

Raja Ampat conservation area is divided into three zones: the core zone, the tourism zone, and the open zone. This region is crucial for sustainable fisheries and environmental management, yet it is under significant anthropogenic pressure. Accurate species detection is essential for inventory and diversity surveys, and environmental DNA (eDNA) methods have been shown to be more effective than conventional techniques. This study aimed to evaluate whether V9 primers could detect multispecies invertebrate compositions, assess community structure and contributions within each zone, and identify significant differences in invertebrate diversity among the zones. A total of 66 eDNA samples were collected from water and sediment columns across the three zones. Samples were extracted using the NucleoSpin™ kit (Macherey-Nagel) protocol, amplified with universal eukaryote primers targeting the 18S gene, and sequenced using Illumina MiSeq. Taxonomic analysis was performed using QIIME2 software and the SILVA database. The study identified 19 invertebrate species. The Shannon-Wiener (H') and Simpson (D) indices revealed greater species diversity in the core zone compared to the tourism and open zones. However, the Kruskal-Wallis test indicated no significant differences in species diversity across the zones. SIMPER analysis demonstrated a high percent contribution of species in each zone. This study highlights the effectiveness of eDNA methods for biodiversity assessment and offers valuable insights into invertebrate community structures within the Raja Ampat conservation area.

Seaweed is an important biological resource for human life, serving essential ecological functions, including providing shelter and feeding grounds for marine biota. Seaweed can be found in several Indonesian waters, growing naturally or through cultivation, including in the waters around Simeulue Island. This study aimed to assess the distribution of seaweed in relation to land suitability, using oceanographic parameters in Simeulue Island waters. The research was conducted at five stations within the West Teupah District, South Teupah District, and Alafan District. In situ measurements were taken to evaluate land suitability for seaweed growth based on oceanographic parameters such as current speed, depth, substrate type, salinity, temperature, pH, and dissolved oxygen. Results indicated that seaweed in Simeulue Island waters is distributed along the coastline and attached to coral reefs and rocks at depths of 2-5 meters. The total area of seaweed distribution is approximately 351.83 hectares along a coastline of 206.12 km. The measured parameters of seaweed habitats include a pH of 7.7 to 7.9, salinity of 31-35.3 ppt, temperature of 20-30 °C, dissolved oxygen levels of 3-4.8 mg/L, depth of 2-5 meters, current speed of 0.10 to 0.60 m/s, and a sandy coral substrate. Based on these water quality and substrate parameters, the seaweed habitats in Simeulue Island are classified as highly suitable, with suitability values ranging from 64 to 82. The recorded environmental conditions collectively support optimal seaweed growth.

Lithodes santolla (Molina, 1785) es un crustáceo decápodo conocido vulgarmente como centolla o “southern king crab”. Se distribuye en aguas templado-frías del cono sur americano, en el océano Atlántico y Pacífico. Es una especie bentónica que puede habitar un rango de profundidad desde la costa hasta más allá de los 700 m de profundidad. Debido a las altas concentraciones y al valor comercial que tienen las centollas se las ha considerado un recurso con un particular interés en la investigación. Actualmente en Argentina se han definido cuatro efectivos de pesca: el Efectivo de la Plataforma y Talud Bonaerense (EPTB), el Efectivo del Sector Patagónico Central (ESPC), el Efectivo del Sector Patagónico Sur (ESPS) ubicado en la costa atlántica de la provincia de Santa Cruz y Tierra del Fuego y el Efectivo del Canal Beagle (ECB). En los efectivos ESPC y ESPS la pesca industrial se realiza con buques congeladores desde el año 2008 y 2016, respectivamente. La temperatura del agua de mar puede ser una limitante en la distribución de especies ectotérmicas, ya que afecta procesos fisiológicos, reproductivos y comportamentales. Además, conocer las relaciones entre las variables ambientales y los procesos biológicos de la especie permiten una mejor gestión y evaluación de la pesquería. En Argentina no se cuenta con trabajos científicos donde se relacionen las abundancias de L. santolla con la temperatura ambiental. El objetivo principal de este estudio fue analizar la variación interanual de abundancias de centolla en relación con la temperatura del fondo del mar, particularmente en el Sector Patagónico Sur.