Ordines Francesc

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Last Name
Ordines
First Name
Francesc
ORCID
0000-0002-2456-2214

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  • Article
    Exploitation and conservation status of the Thornback Ray (Raja clavata) in the Balearic Islands (Western Mediterranean)
    (MDPI, 2023-02-19) Ferragut-Perello, Francesca ; Ramírez-Amaro, Sergio ; Tsikliras, Athanassios C. ; Petit-Marty, Natalia ; Dimarchopoulou, Donna ; Massutí, Enric ; Serrat, Alba ; Ordines, Francesc
    Fisheries management requires the best scientific knowledge on the exploitation and conservation status of stocks. This is challenging for by-catch species, for which necessary data for their assessment is more limited than for target ones. That is the case for the thornback ray, Raja clavata, in the Balearic Islands (western Mediterranean), whose exploitation and conservation status are addressed here for the first time, in an integrative approach, by using innovative assessment methods and genetic diversity analysis. The time series of fishing landings from 1964 and MEDITS trawl survey data from 2004 were used to apply CMSY++ and Bayesian state-space Schaefer production models. We also estimated the genetic diversity of the Cytochrome C Oxidase subunit I mitochondrial gene from 31 individuals collected during MEDITS surveys. The species showed overexploitation with a current fishing mortality (F) below that producing maximum sustainable yield (FMSY), but with a current stock biomass (B) lower than BMSY. Despite the fact that the exploitation status is stable or even has improved in the last decades, the overexploitation period since the late 1970s seems to have reduced levels of genetic diversity, below those of related species and other populations of R. clavata. This low genetic diversity may entail the loss of adaptive potential, making the species more vulnerable to fishing and the current climate change.
  • Article
    Scientific knowledge gaps on the biology of non-fish marine species across European Seas
    (Frontiers Media, 2023-10-03) Abucay, Luisa R. ; Sorongon-Yap, Patricia ; Kesner-Reyes, Kathleen ; Capuli, Emily C. ; Reyes Jr, Rodolfo B. ; Daskalaki, Eva ; Ferra, Carmen ; Scarcella, Giuseppe ; Coro, Gianpaolo ; Ordines, Francesc ; Sanchez-Zulueta, Paula ; Dakalov, Georgi ; Klayn, Stefania ; Celie, Liesa ; Scotti, Marco ; Gremillet, David ; Lambert, Charlotte ; Gal, Gideon ; Palomares, Maria Lourdes D. ; Dimarchopoulou, Donna ; Tsikliras, Athanassios C.
    Available information and potential data gaps for non-fish marine organisms (cnidarians, crustaceans, echinoderms, molluscs, sponges, mammals, reptiles, and seabirds) covered by the global database SeaLifeBase were reviewed for eight marine ecosystems (Adriatic Sea, Aegean Sea, Baltic Sea, Bay of Biscay/Celtic Sea/Iberian Coast, Black Sea, North Sea, western Mediterranean Sea, Levantine Sea) across European Seas. The review of the SeaLifeBase dataset, which is based on published literature, analyzed information coverage for eight biological characteristics (diet, fecundity, maturity, length-weight relationships, spawning, growth, lifespan, and natural mortality). These characteristics are required for the development of ecosystem and ecological models to evaluate the status of marine resources and related fisheries. Our analyses revealed that information regarding these biological characteristics in the literature was far from complete across all studied areas. The level of available information was nonetheless reasonably good for sea turtles and moderate for marine mammals in some areas (Baltic Sea, Bay of Biscay/Celtic Sea/Iberian Coast, Black Sea, North Sea and western Mediterranean Sea). Further, seven of the areas have well-studied species in terms of information coverage for biological characteristics of some commercial species whereas threatened species are generally not well studied. Across areas, the most well-studied species are the cephalopod common cuttlefish (Sepia officinalis) and the crustacean Norway lobster (Nephrops norvegicus). Overall, the information gap is narrowest for length-weight relationships followed by growth and maturity, and widest for fecundity and natural mortality. Based on these insights, we provide recommendations to prioritize species with insufficient or missing biological data that are common across the studied marine ecosystems and to address data deficiencies.