Decapod crustacean larvae dynamics in the west continental coast of Portugal: the region adjacent to Aveiro coastal lagoon as model

Tese de dout., Ciências do Mar, Faculdade de Ciências do Mar e do Ambiente, Univ. do Algarve, 2010Present thesis pretends to describe the horizontal and vertical distribution patterns of decapod crustacean larvae in the Portuguese upwelling ecosystem. The studied taxa were retained close to their parental populations; so, species from the inner shelf had their larvae concentrated close to the shore, species from the shelf had their larvae over the shelf, and the slope species had their larvae along the shelf break. The ontogenetic vertical distribution was also analysed, and the average depth of distribution of the larval stages varied through the larval development. The majority of the studied species had their early zoeal stages more close to the surface and the last zoeal stages in a more deep position. The morphological larval descriptions from laboratory cultured material of the three selected larval forms of decapod larvae are presented: the larval development of two closely related species of Lysmata, L. galapagensis e L. moorei (caridean shrimps), the complete larval developments of Clibanarius aequabilis and C. erythropus (hermit crabs), and the complete larval development of the crab Ilia nucleus.Faculdade de Ciências e Tecnologia (FCT

Dinâmica larvar de Pisidia Longicornis (Linnaeus, 1767) na costa ocidental de Portugal continental adjacente à ria de Aveiro

Dissertação de mest., Estudos Marinhos e Costeiros, Faculdade de Ciências do Mar e do Ambiente, Univ. do Algarve, 2005Este trabalho pretende descrever os padrões de distribuição horizontal, vertical e temporal dos estádios larvares de Pisidia longicornis e a sua relação com as condições hidrológicas na plataforma continental Portuguesa. Os dados aqui apresentados foram obtidos a partir de uma campanha oceanográfica realizada ao largo da Ria de Aveiro, entre os dias 9-22 de Maio de 2002. Na análise temporal foram também utilizados dados históricos referentes ao período de Outubro de 1986 a Janeiro de 1989. Os resultados permitem concluir que o estádio recém eclodido é transportado da linha de costa até à plataforma continental, conseguindo manter-se durante o seu desenvolvimento entre os 20-25 km da costa, através de migrações verticais favorecidas pela zona de retenção aí existente. As migrações verticais fazem-se pela subida na coluna de água no período nocturno, com ritmos diferentes consoante o estádio de desenvolvimento. O zoé I, sem um ritmo claro de migração vertical, ascende desde os 25 m de profundidade até à camada superficial. O zoé II inicia a sua migração logo após o pôr-do-sol, desde perto do fundo até aos 10-15 m. O megalopa migra verticalmente na coluna de água entre as 0 e as 4h, desde o fundo até à camada de neuston. Espacialmente, comparando com os estádios de zoé, o megalopa encontra-se em maior abundância nas estações mais próximas da costa, evidenciando um transporte efectivo para os locais de assentamento. A evolução mensal de abundâncias larvares ao longo do ano na área em estudo sugere dois picos de emissão larvar (Março- Abril, Julho-Setembro), reflectindo dois picos de abundância do megalopa (Primavera e final do Verão

Complete larval development of the crab Ilia nucleus (Linnaeus, 1758) (Decapoda, Brachyura, Leucosiidae) reared under laboratory conditions

The complete larval development of the crab Ilia nucleus (Linnaeus, 1758) reared under laboratory conditions was obtained. The four zoeal stages and the megalopa are described and illustrated in detail. The larval features observed in I. nucleus fit into the characteristics of the family proposed by Rice (1980) for the zoeal stages and by Quintana (1986) for the megalopa. The morphological characters of larval stages of I. nucleus are compared with previous descriptions, and with those of other known larvae of Leucosiidae (only for subfamilies Ebaliinae and Leucosiinae). The present work supports the hypothesis that the subfamily Ebaliinae is a heterogeneous group. For the correct identification of a zoeal stage of a leucosiid crab, besides counting the number of setae on maxilliped exopods, the antennule as well as the pereiopods development should be used as additional characters

Complete larval development of the hermit crabs Clibanarius aequabilis and Clibanarius erythropus (Decapoda : Anomura : Diogenidae), under laboratory conditions, with a revision of the larval features of genus Clibanarius

The complete larval development (four zoeae and one megalopa) of Clibanarius aequabilis and C. erythropus, reared under laboratory conditions, is described and illustrated. The larval stages of the two northeastern Atlantic Clibanarius species cannot be easily differentiated. Their morphological characters are compared with those of other known Clibanarius larvae. The genus Clibanarius is very homogeneous with respect to larval characters. All Clibanarius zoeae display a broad and blunt rostrum, smooth abdominal segments and an antennal scale without a terminal spine. Beyond the second zoeal stage, the fourth telson process is present as a fused spine, and the uropods are biramous. In the fourth larval stage all species display a mandibular palp. The Clibanarius megalopa presents weakly developed or no ocular scales, symmetrical chelipeds, apically curved corneous dactylus in the second and third pereiopods, and 5-11 setae on the posterior margin of the telson. Apart from the number of zoeal stages, Clibanarius species may be separated, beyond the second zoeal stage, by the telson formula and the morphology of the fourth telson process.info:eu-repo/semantics/publishedVersio

MarinEye - A tool for marine monitoring

This work presents an autonomous system for marine integrated physical-chemical and biological monitoring – the MarinEye system. It comprises a set of sensors providing diverse and relevant information for oceanic environment characterization and marine biology studies. It is constituted by a physicalchemical water properties sensor suite, a water filtration and sampling system for DNA collection, a plankton imaging system and biomass assessment acoustic system. The MarinEye system has onboard computational and logging capabilities allowing it either for autonomous operation or for integration in other marine observing systems (such as Observatories or robotic vehicles. It was designed in order to collect integrated multi-trophic monitoring data. The validation in operational environment on 3 marine observatories: RAIA, BerlengasWatch and Cascais on the coast of Portugal is also discussed.info:eu-repo/semantics/publishedVersio

Marine Strategy Framework Directive - Descriptor 2, Non-Indigenous Species, Delivering solid recommendations for setting threshold values for non-indigenous species pressure on European seas

Marine Non-Indigenous Species (NIS) are animals and plants introduced accidently or deliberately into the European seas, originating from other seas of the globe. About 800 marine non-indigenous species (NIS) currently occur in the European Union national marine waters, several of which have negative impacts on marine ecosystem services and biodiversity. Under the Marine Strategy Framework Directive (MSFD) Descriptor 2 (D2), EU Member States (MSs) need to consider NIS in their marine management strategies. The Descriptor D2 includes one primary criterion (D2C1: new NIS introductions), and two secondary criteria (D2C2 and D2C3). The D2 implementation is characterized by a number of issues and uncertainties which can be applicable to the Descriptor level (e.g. geographical unit of assessment, assessment period, phytoplanktonic, parasitic, oligohaline NIS, etc.), to the primary criterion D2C1 level (e.g. threshold values, cryptogenic, questionable species, etc), and to the secondary criteria D2C2 and D2C3. The current report tackles these issues and provides practical recommendations aiming at a smoother and more efficient implementation of D2 and its criteria at EU level. They constitute a solid operational output which can result in more comparable D2 assessments among MSs and MSFD regions/subregions. When it comes to the policy-side, the current report calls for a number of different categories of NIS to be reported in D2 assessments, pointing the need for the species to be labelled/categorised appropriately in the MSFD reporting by the MSs. These suggestions are proposed to be communicated to the MSFD Working Group of Good Environmental Status (GES) and subsequently to the Marine Strategy Coordination Group (MSCG) of MSFD. Moreover, they can serve as an input for revising the Art. 8 Guidelines

Non-indigenous species refined national baseline inventories : A synthesis in the context of the European Union's Marine Strategy Framework Directive

Refined baseline inventories of non-indigenous species (NIS) are set per European Union Member State (MS), in the context of the Marine Strategy Framework Directive (MSFD). The inventories are based on the initial assessment of the MSFD (2012) and the updated data of the European Alien Species Information Network, in collaboration with NIS experts appointed by the MSs. The analysis revealed that a large number of NIS was not reported from the initial assessments. Moreover, several NIS initially listed are currently considered as native in Europe or were proven to be historical misreportings. The refined baseline inventories constitute a milestone for the MSFD Descriptor 2 implementation, providing an improved basis for reporting new NIS introductions, facilitating the MSFD D2 assessment. In addition, the inventories can help MSs in the establishment of monitoring systems of targeted NIS, and foster cooperation on monitoring of NIS across or within shared marine subregions. Highlights • Refined MSFD baseline inventories of non-indigenous species (NIS) are set in EU. • The inventories are given per EU Member State (MS) and MSFD subregion up to 2012. • The NIS lists provide a basis for reporting new NIS introductions in EU after 2012. • Our work constitutes a milestone for the MSFD Descriptor 2 implementation

Non-indigenous species refined national baseline inventories: A synthesis in the context of the European Union's Marine Strategy Framework Directive

Refined baseline inventories of non-indigenous species (NIS) are set per European Union Member State (MS), in the context of the Marine Strategy Framework Directive (MSFD). The inventories are based on the initial assessment of the MSFD (2012) and the updated data of the European Alien Species Information Network, in collaboration with NIS experts appointed by the MSs. The analysis revealed that a large number of NIS was not reported from the initial assessments. Moreover, several NIS initially listed are currently considered as native in Europe or were proven to be historical misreportings. The refined baseline inventories constitute a milestone for the MSFD Descriptor 2 implementation, providing an improved basis for reporting new NIS introductions, facilitating the MSFD D2 assessment. In addition, the inventories can help MSs in the establishment of monitoring systems of targeted NIS, and foster cooperation on monitoring of NIS across or within shared marine subregions.Henn Ojaveer and Maiju Lehtiniemi wish to acknowledge the project COMPLETE (Completing management options in the Baltic Sea region to reduce risk of invasive species introduction by shipping), co-financed by the European Union's funding Programme Interreg Baltic Sea Region (European Regional Development Fund). João Canning-Clode was supported by a starting grant in the framework of the 2014 FCT Investigator Programme (IF/01606/2014/CP1230/CT0001) and wish to acknowledge the support of Fundação para a Ciência e Tecnologia (FCT), through the strategic project UID/MAR/04292/2019 granted to MARE

The secret life of deep-sea shrimps: ecological and evolutionary clues from the larval description of Systellaspis debilis (Caridea: Oplophoridae)

Currently there are 21 shrimp species in the northeastern Atlantic and Mediterranean Sea which are considered to belong to the superfamily Oplophoroidea, but the larval development is unknown for most of them. The complete larval development of Systellaspis debilis (Milne-Edwards, 1881), here described and illustrated, is the first one to have been successfully reared in the laboratory, consisting of four zoeal and one decapodid stages. The zoeae were found to be fully lecithotrophic, which together with the females’ lower fecundity, are probably evolutionary consequences of the species mesopelagic habitat

Learning lessons and moving forward

Funding Information: This work was supported by the Directorate-General Environment of the European Commission (Grant Number 110661/2018/794607/SUB/ENV.C2 ). Fundação para a Ciência e a Tecnologia ( FCT , Portugal), through the strategic projects , and the project LA/P/0069/2020 granted to the Associate Laboratory ARNET - Aquatic Research Network. We are very grateful to all partners of the RAGES (Risk Based Approaches to Good Environmental Status; https://www.msfd.eu/rages/rages.html) consortium for discussions during the development of this work, particularly to Jean-Marc Brignon and Valentin Chapon for their contributions to discussions around the application of the ELECTRE II approach. We are also indebted to the RAGES partners as well as to invited experts that contributed to the NIS lists and to the HS exercise. Finally, we would like to thank two anonymous reviewers for their remarks, which improved the quality of this work. Publisher Copyright: © 2023 The AuthorsRisk-based Approaches (RBA) are increasingly playing an explicit and important role in a number of environmental regulations across Europe and globally. In this paper, we summarise a generic RBA developed for the Marine Strategy Framework Directive (MSFD) and its application to two descriptors of Good Environmental Status (GES) for marine waters, Non-Indigenous Species and Underwater Energy and Noise (Descriptors 2 and 11). We provide an overview of the findings and outcomes emerging from the application, which focus on identifying common advantages as well as common challenges encountered in the application of the RBA. Recommendations are then made, aimed at identifying potential solutions to the common problems, particularly in relation to data and expert-judgement approaches. Further recommendations address the development of governance structures to facilitate the uptake of risk-based approaches at the level of the MSFD common implementation strategy. Finally, some general and specific recommendations are made to effectively embed RBA and enhance regional cooperation for future implementation of the MSFD.publishersversionpublishe