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Metabolites from the soft coral -associated bacterium Micrococcus sp. strain a-2-28
No full textThe marine actinomyces Micrococcus was the most common bacterium among the isolates corals, sponges, and alga isolates. Only a few investigations of natural compounds from Micrococcus sp. were reported previously. This study implicated the soft coral-associated Micrococcus sp. strain A-2-28 (following relative Micrococcus flavus LW4T) for large-scale cultivation, chemical analyses, and biological activities. Whereas crude extract of the strain A-2-28 inhibited only Staphylococcus epidermidis, metabolites profiles and pure compounds from strain A-2-28 showed that this strain produced phytohormone (IAA), metabolized some new compounds which were almost inactive for biological tests. This work suggested that it is possible to plan a new strategy for improving coral health and resilience though their associated microbial.PublishedReferee
Capacity-Building and the Transfer of Marine Technology
No full textIn the sixth video (6/6) of the series, Mr Carl Grainger (Department of Foreign Affairs, Ireland) explains the provisions of Part V on "Capacity-building and the transfer of marine technology" of the Agreement under the United Nations Convention on the Law of the Sea on the conservation and sustainable use of marine biological diversity of areas beyond national jurisdiction (BBNJ Agreement), which was adopted on 19 June 2023 in New York. The presentation is part of the workshop "Conservation and sustainable use of marine biological diversity of areas beyond national jurisdiction (BBNJ)", which took place in the framework of the 9th Summer School on the European Union and the Law of the Sea (EULoS). It was organized by the Institute for the Law of the Sea and International Marine Environmental Law (@ISRIM ) and the University of Genoa (@Uni.Genova ) on 1 September 2023. The workshop is a UN Ocean Decade Activity.Challenge 4: Develop a sustainable and equitable ocean economy; Challenge 9: Skills, knowledge and technology for all.PublishedReferee
Микроспоридиоз камбал, вызываемый Tetramicra brevifilum
No full textThis article summarizes existing scientific data on microsporidiosis of flatfishes caused by Tetramicra brevifilum. This disease has not yet been recorded in the Azov and Black Seas, but it is found in the adjacent Mediterranean region and the European Atlantic, where it is one of the most prevalent turbot diseases in the context of the commercial cultivation of this fish species. Scientific information on the pathogen, patterns of the disease progression, its geographical distribution, as well as clinical, pathological, epizootic and other features of invasion is given. The danger of the microsporidia T. brevifilum for the Azov and Black Sea flatfishes results from their potential susceptibility to this disease, as well as the possibility of the introduction of this pathogen into the Black Sea due to climate warming, ornamental fish keeping, natural migration of Mediterranean fish species and transportation of stocking material (eggs, juveniles, breeders) for marine cultivation facilities. Methodological approaches to the diagnosis of this disease are described.В статье обобщены современные научные данных о микроспоридиозе камбал, вызываемом Tetramicra brevifilum. Это заболевание пока не обнаружено у рыб в Азовском и Черном морях, но встречается у рыб в соседнем Средиземноморском регионе и европейской Атлантике, где является одним из основных у тюрбо при его товарном выращивании. Приводятся сведения о возбудителе болезни, формах ее течения, географическом распространении, клинических, патологоанатомических, эпизоотических и иных признаках инвазии. Опасность микроспоридий T. brevifilum для азово-черноморских камбалообразных рыб обусловлена их потенциальной восприимчивостью к данному заболеванию, а также вероятностью заноса этого патогена в Черное море в связи с потеплением климата, аквариумистикой, естественной миграцией средиземноморских рыб и перевозкой посадочного материала (икра, молодь, производители) для морских ферм. Описываются методические подходы к диагностике этой болезни.PublishedNon Referee
Oceanographic factors as modulators of biodiversity in the La Guajira upwelling system: a systematic review
No full textEn la zona norte de Colombia se encuentra el departamento de La Guajira, un área marinocostera influenciada por diferentes procesos oceanográficos y atmosféricos que le atribuyen características únicas. Diversas investigaciones se han centrado en describir el comportamiento oceanográfico de La Guajira, en la cual las variables ambientales responden de manera distinta de acuerdo con la época climática; sin embargo, son pocos los trabajos que contrastan los procesos oceanográficos del área de interés con la biodiversidad. La presente revisión sistemática tuvo como objetivo determinar los principales factores ambientales que modulan la oceanografía de La Guajira, y establecer si los autores los vinculan con aspectos de biodiversidad. Para lograrlo se realizó una búsqueda de artículos científicos relacionados con temas de climatología y oceanografía de La Guajira, para lo cual fueron consultadas tres bases de datos mundialmente reconocidas: Scopus, Science Direct, y Web of Science. Finalmente, se concluyó que, a pesar de que varias investigaciones han analizado el comportamiento del mar Caribe y la manera en la que su temperatura, salinidad y clorofila varían a diferentes escalas, pocas investigaciones se han enfocado en relacionar estas características con la biodiversidad de la zona; un aspecto clave para tener en cuenta si se considera que las especies y los ecosistemas responden a la manera en la que se comporta el clima y el océano.In the northern part of Colombia is the department of La Guajira, a marine-coastal area influenced by different oceanographic and atmospheric processes that give it unique characteristics. Various investigations have focused on describing the oceanography of La Guajira, in which the environmental variables respond differently according to the climatic season; however, there are few works that contrast the oceanographic processes of the area of interest with the biodiversity. The objective of this systematic review was to determine the main environmental factors that modulate the oceanography of La Guajira and to establish whether the authors link them with aspects of biodiversity. To achieve this, a search was carried out for scientific articles related to the climatology and oceanography of La Guajira, for which three world-renowned databases were consulted: Scopus, ScienceDirect, and Web of Science. Finally, it was concluded that, although several investigations have analyzed the behavior of the Caribbean Sea and the way in which its temperature, salinity and chlorophyll vary at different scales, few investigations have focused on relating these characteristics with the biodiversity of the zone; a key aspect to take into account if we think that species and ecosystems respond to the way the climate and the ocean behave.PublishedNot Know
Scientific, Technical and Economic Committee for Fisheries (STECF) – 72nd Plenary report (STECF-PLEN-23-01)
No full textThe JRC presented a brief review of the current STECF system in place to provide advice on Mediterranean fisheries management and data collection issues. JRC highlighted some structural risks and inefficiencies that currently exist. The review explored some examples of integrated actions that could reduce or mitigate such risks. Such actions as part of a long-term strategy would lead to a proactive advisory process as opposed to the current more reactive sequence of individual steps considered by STECF. STECF notes this initiative from the JRC and aims to revisit the topic in time for development of the next management plan stage, post 2025. On 21 February 2023, the Commission adopted the Fisheries and Ocean package consisting of four documents: the Communication on the functioning of the CFP, the Action Plan “Protecting and restoring marine ecosystems for sustainable and resilient fisheries”, the Energy transition initiative and the report on the functioning of the Common Market Organisation (CMO). The package brings together all different aspects of the EU’s policy on fisheries and the Ocean, looking at the future, and at how we can ensure that fisheries continue to grow in resilience and sustainability. With this package, the European Commission plans on launching a policy discussion with all institutions and stakeholders the EU’s policy on fisheries and the OceanEuropean CommissionPublishedReferee
Biometric indices of Pseudotolithus elongatus (Bowdich, 1825) from the coastal waters of Rivers State, Nigeria
No full textLength-weight relationships (LWRs), length-length relationships (LLRs), and condition factor of Pseudotolithus elongatus from the coastal waters of Rivers State, Nigeria, were studied. Specimens were collected from the catches of fishermen using various fishing gear. The dominant length ranged from 20 to 26 cm, with a mean length of 22.65±3.06cm. The monthly length-weight relationship was estimated separately for male and female, with the b values indicating positive allometric growth (b > 3.00) in November, January, and February for both male and female. The females experienced negative allometric growth (b < 3.00) in December, March, and April, while the males exhibited a negative allometric growth pattern in April. The combined b value of LWRs (TL vs. BW) indicates positive allometric growth, and SL vs. BW indicates negative allometric growth. Also, the b value of LLR (TL vs. SL) indicates negative allometric growth. The condition factors varied for both sexes, ranging from 0.35 to 1.2 in males and 0.57 to 1.14 in females, while the combined condition factor ranged from 0.35 to 1.2. The present findings will provide useful information for a well-organized and significant exploitation and regulation of Sciaenid species following the aftermath of massive fish kills and continuous exploitation of fish species in the study area.PublishedReferee
Samudra Report No.89, August 2023
No full textThe current edition of SAMUDRA Report, No. 89, dated August 2023, features a range of articles from Africa, Asia, the Pacific Islands and the Amazon, as well as an analysis of climate change and fisheries, and a comprehensive look at the Illuminating Hidden Harvests (IHH) report, arguably the most concerted and comprehensive research effort so far to focus exclusively on small-scale fisheries (SSF). Fiji, Samoa, the Solomon Islands, Vanuatu, Papua New Guinea, Tonga, Ghana, France, Sri Lanka, India — these are some of the countries covered in the latest edition of SAMUDRA Report. The issue also introduces the IHH report, a global study which mobilized over 800 contributors from around the world to generate and disseminate new evidence about the importance of SSF to inform policy and practice.PublishedReferee
Условия формирования запаса раков в Веселовском водохранилище
No full textCrayfish is a long-established fisheries target in the water bodies of the Rostov Region. This work presents the data characterizing the pollution of water and bottom sediments with petroleum products, organochlorine pesticides, and heavy metals. The changes in the biological parameters of the crayfish population in the reservoir have been reviewed. The status of crayfish population, their stocks and abundance in the reservoir are conditional upon the existing range of abiotic and anthropogenic factors. The ecological improvement of the environment in 2020–2022 and the low concentrations of petroleum products, organochlorine pesticides and heavy metals facilitated the recovery of the crayfish exploitable stock that reached 32.9 t in 2022. In the consistently favourable conditions, under a regular monitoring of the productive crayfish populations, sustainable exploitation of their stocks and responsible control over their harvesting implemented by the fisheries protection authorities, this reservoir will retain its crayfish commercial importance.Раки — традиционный объект промысла в водных объектах Ростовской области. В работе представлены материалы, характеризующие загрязнение воды и донных отложений нефтепродуктами, хлорорганическими пестицидами и тяжелыми металлами. Дан обзор изменений биологических параметров популяции раков в водохранилище. Состояние популяции раков, их численность и запасы в водохранилище определяет сложившийся комплекс абиотических и антропогенных факторов. Улучшение экологической ситуации в 2020–2022 гг. и низкие концентрации нефтепродуктов, хлорорганических пестицидов и тяжелых металлов способствовали восстановлению промыслового запаса к 2022 г. до уровня 32,9 т. В стабильно благоприятных трофических условиях, при систематическом мониторинге ракопродуктивных популяций, рациональном использовании запасов раков и ответственном контроле промысла в водохранилище органами рыбоохраны водохранилище сохранит ракопромысловый статус.PublishedNon Referee
Size class, density, and distribution of Uca tangeri (Eydoux, 1835; Decapoda: Ocypodidae) in the mangrove ecosystems of Senegal
No full textThis study focusing on the decap od brachy uran Uca tangeri is the first of its kind in Senegal. It was carried out in the mangroves of the Senegal River delta, the Saloum islands, and the Casamance estuary . The modal cep halothoracic length (L; mm) is between 24 and 25 mm in Saint -Louis, 18 and 19 mm in the Saloum, and 16 and 17 mm in Casamance. The modal cep halothoracic weight (Wei; mm) oscillates between 31 and 32 mm in Saint -Louis, 24 and 25 mm in the Saloum, and 25 and 26 mm in Casamance. Whether it is the relation Lc/We or that of the height/weight, the allome-tric growth of crabs is negative (b 0.8) among the biometric p arameters. The average crab density in the mangrove is between 1.3 and 1.6 crabs p er square meter. The strong p resence and abundance of Uca tangeri suggest this sp ecies does not have a p referential spatial distributionPublishedReferee
Промысел тюльки в Азовском море: применяемые орудия и способы лова, тенденции судового промысла в современный период
No full textThis paper presents the main fishing methods and gears previously used or appraised and currently applied in the course of Black Sea–Caspian sprat (tyulka) fishing in the Azov Sea: their performance, merits and demerits. Black Sea–Caspian sprat (tyulka) fishing comprises the coastal fishing with pound nets and the fishing off the board of fishing vessels with purse seines ans midwater trawls. Recently, sprat catches with pound nets have been on the decline; meanwhile, use of fishing vessels, albeit more resource-consuming and dependent on the multitude of factors, can prospectively be more productive than the coastal fishing, even though currently it shows lower catches. A brief characterization of the Black Sea–Caspian sprat (tyulka) industrial fishing in the recent years is given, its trends and challenges are discussed. Daily vessel reports have been processed for 2015–2021, and the comparative data on the operation of the vessels of various types are presented; the trends in the changing industrial fishing parameters during the investigated period show a considerable decrease in all the parameters. Another crucial issue is the necessity to reduce the by-catch of non-target fish species (sturgeons, Black Sea turbot) in long-continued depressed state with midwater trawls. The presented data will allow for the current status assessment of the Black Sea–Caspian sprat (tyulka) industrial fishing and envisioning the efficient, yet selective and environmentally sound fishing methods to be developed and revised.В статье рассмотрены основные способы и орудия лова, которые применялись или апробировались ранее, а также используются в настоящее время при промысле тюльки в Азовском море, их производительность, достоинства и недостатки. Промысел тюльки состоит из прибрежного промысла ставными неводами и судового промысла кошельковыми неводами и разноглубинными тралами. Вылов тюльки ставными неводами в последнее время ежегодно снижается, в то время как судовой промысел — более сложный и зависящий от многих факторов — хоть и показывает в последние годы меньшие выловы, чем прибрежный, но может быть в целом более перспективным. Дана краткая характеристика судового промысла тюльки в последние годы, освещены его тенденции и проблемы. Обработаны судовые суточные донесения о промысле тюльки за 2015–2021 гг., приведены сравнительные данные по работе разных типов судов; тенденции изменения параметров судового промысла за этот период показывают существенное снижение всех показателей. В то же время актуальным становится вопрос снижения прилова в разноглубинных тралах нецелевых видов промысла (осетровых, камбалы-калкан), находящихся продолжительное время в депрессивном состоянии. Представленные материалы позволяют оценить состояние судового промысла в современный период и наметить направления развития и совершенствования уловистых и при этом селективных и щадящих способов и орудий лова тюльки.PublishedReferee