Browsing by Author "Lishchenko, Fedor"
Now showing 1 - 5 of 5
Results Per Page
Sort Options
- Impacts of anthropogenic activities on cephalopodsPublication . Pierce, Graham; Abad, Esther; Allcock, Louise; Badouvas, Nicholas; Barrett, Christopher; González-Gómez, Roberto; Hendrickson, Lisa; Lefkaditou, Evgenia; Lonsdale, Jemma; Matos, Fábio; Moustahfid, Hassan; Oesterwind, Daniel; Perales-Raya, Catalina; Pita, Cristina; Power, Anne Marie; Roumbedakis, Katina; Seixas, Sónia; Valeiras, Julio; Villasante, Sebastián; Laptikhovsky, Vladimir; Robin, Jean-Paul; Lishchenko, FedorIn past centuries, the impacts on cephalopods from humankind were negligible. The first documented small-scale exploitation of cephalopods occurred in the Mediterranean and Asia. Between 1950-2019, global cephalopod catches increased by about an order of magnitude, from 0.5 million tones to a peak of 4.85 million tons. The human impact on the oceans also increased substantially in this period. Human-induced climate change, habitat destruction, increased marine traffic, development of coastal infrastructure, pollution and growing fishing effort, may all have had negative impacts on cephalopod populations. But while the responses to anthropogenic impacts have been investigated for many ecosystem components, those for cephalopods are largely unknown. Cephalopods are sensitive to multiple environmental variables such as ocean temperature and dissolved oxygen concentrations, while geographic shifts in distribution in response to temperature changes are already documented. Their sensitivities to other human pressures are beginning to emerge, but most of these still need to be examined. How much habitat has been lost? How does noise affect cephalopods? What are the lethal thresholds for various chemical pollutants, or how may these act to inhibit reproduction? Does light pollution impact cephalopods? With such knowledge gaps, it is difficult to predict how cephalopods will respond to increasing human impacts. Our study aims to provide a review of what is known about anthropogenic impacts on cephalopods and their potential responses to these impacts. This information can be used to identify the research priorities for improving our understanding of human-induced impacts on cephalopods and the development of mitigation measures.
- Spatial distribution of Cephalopods of the European Shelf and their associated oceanographic parameters based on occurrence in standardized demersal fishing trawlsPublication . Oesterwind, Daniel; Matos, Fábio; Abad, Esther; Certain, Gregoire; Fotiadis, Nikolaos; Gonzales, Ángel; Laptikhovsky, Vladimir; Lishchenko, Fedor; Moreno, Ana; Monteiro, Silvia; Montero, Carlos; Moustahfid, Hassan; Pierce, Graham; Power, Anne Marie; Robin, Jean-Paul; Seixas, Sónia; Valeiras, JulioChanging oceans impact the whole marine ecosystem in different ways. For example, rising ocean temperatures can affect the presence / absence of species, especially when local environmental conditions exceed individual species’ physiological tolerances. Accordingly, climate change has caused shifts in distribution and expansions for various cephalopods worldwide. Cephalopods play an important role in the ecosystem, especially in food webs. Consequently, spatial distribution shifts might help explain observed ecosystem changes. Therefore, maps for cephalopod distributions need to be reviewed and updated. Meanwhile, information on the associated environmental conditions will permit future occurrence of cephalopods to be modelled, which is interesting from a fishery and ecological perspective. Some information about physiological tolerances of cephalopods are known from laboratory studies and aquaculture experience, as well as from field observations. Laboratory data are often based on narrow ranges, depending on the experimental design, and can therefore provide only a limited understanding of physiological tolerances. On the other hand, field observations are also limited due to the spatial and temporal limitations of surveys, but these might provide a more realistic picture of natural tolerances. Here, we use the ICES Datras dataset to, first, describe the current distribution of cephalopods associated with the European shelf and, second, advance the knowledge regarding environmental ranges of the various species included in the analysis by combining occurrence data with in-situ oceanographic data. An additional literature review will provide information about the different environmental requirements of various life stages. The results allow us to increase the knowledge of physiological preferences of various cephalopod species within the North-East Atlantic Ocean. Finally, we will discuss and present potential future trends in cephalopod occurrence within the NE Atlantic. In order to further strengthen our knowledge of physiological tolerances of various cephalopod species more data on life history and life stages is needed to develop a more advanced mechanistic model.
- The significance of cephalopod beaks as a research tool: an updatePublication . Xavier, José C.; Golikov, Alexey V.; Queirós, José P.; Perales-Raya, Catalina; Rosas-Luis, Rigoberto; Abreu, José; Bello, Giambattista; Bustamante, Paco; Capaz, Juan C.; Dimkovikj, Valerie H.; González, Angel F.; Guímaro, Hugo; Guerra-Marrero, Airam; Gomes-Pereira, José N.; Kubodera, Tsunemi; Laptikhovsky, Vladimir; Lefkaditou, Evgenia; Lishchenko, Fedor; Luna, Amanda; Liu, Bilin; Pierce, Graham; Pissarra, Vasco; Reveillac, Elodie; Romanov, Evgeny V.; Rosa, Rui; Roscian, Marjorie; Rose-Mann, Lisa; Rouget, Isabelle; Sánchez, Pilar; Sánchez-Márquez, Antoni; Seixas, Sónia; Souquet, Louise; Varela, Jaquelino; Vidal, Erica A. G.; Cherel, YvesThe use of cephalopod beaks in ecological and population dynamics studies has allowed major advances of our knowledge on the role of cephalopods in marine ecosystems in the last 60 years. Since the 1960’s, with the pioneering research by Malcolm Clarke and colleagues, cephalopod beaks (also named jaws or mandibles) have been described to species level and their measurements have been shown to be related to cephalopod body size and mass, which permitted important information to be obtained on numerous biological and ecological aspects of cephalopods in marine ecosystems. In the last decade, a range of new techniques has been applied to cephalopod beaks, permitting new kinds of insight into cephalopod biology and ecology. The workshop on cephalopod beaks of the Cephalopod International Advisory Council Conference (Sesimbra, Portugal) in 2022 aimed to review the most recent scientific developments in this field and to identify future challenges, particularly in relation to taxonomy, age, growth, chemical composition (i.e., DNA, proteomics, stable isotopes, trace elements) and physical (i.e., structural) analyses. In terms of taxonomy, new techniques (e.g., 3D geometric morphometrics) for identifying cephalopods from their beaks are being developed with promising results, although the need for experts and reference collections of cephalopod beaks will continue. The use of beak microstructure for age and growth studies has been validated. Stable isotope analyses on beaks have proven to be an excellent technique to get valuable information on the ecology of cephalopods (namely habitat and trophic position). Trace element analyses is also possible using beaks, where concentrations are significantly lower than in other tissues (e.g., muscle, digestive gland, gills). Extracting DNA from beaks was only possible in one study so far. Protein analyses can also be made using cephalopod beaks. Future challenges in research using cephalopod beaks are also discussed.
- Working group on cephalopod fisheries and life history (WGCEPH; outputs from 2019 meeting)Publication . Abad, Esther; Badouva, Nicholas; Fotiad, Nikolaos; González, Ángel; Iriondo, Ane; Juarez, Ana; Karatza, Alexandra; Laptikhovsky, Vladimir; Larivain, Angela; Lefkadito, Evgenia; Lishchenko, Fedor; Matos, Fábio; Moreno, Ana; Monteiro, Silvia; Oesterwind, Daniel; Perales-Raya, Catalina; Petroni, Michael; Piatkowski, Uwe; Pierce, Graham John; Pita, Cristina; Power, Anne Marie; Robin, Jean-Paul; Rocha, Alberto; Samara, Elina; Santurtun, Marina; Seixas, Sónia; Silva, Luis; Smith, Jennifer; Sobrino, Ignacio; Valeiras, Julio; Villasante, Sebastian
- Working group on cephalopod fisheries and life history (Wgceph; outputs from 2022 meeting)Publication . Abad, Esther; Ainsworth, Gillian; Akselrud, Caitlin; Allcock, Louise; Badouvas, Nicholas; Baker, Krista; Barrett, Christopher; Bobowski, Bianca; Carreira, Xose; Certain, Gregoire; Dinis, David; Escánez, Alejandro; Fotiadis, Nikolaos; Ganias, Konstantinos; Golikov, Alexey; Gonzalez, Angel; Gonzalez Gomez, Roberto; Gonzalez, Jose Gustavo; Hendrickson, Lisa; Iriondo, Ane; Seixas, Sónia; Jone, Jessica; Juare, Ana; Jurado-Ruzaf, Alba; Karatz, Alexandra; Kousteni, Vasiliki; Laptikhovsky, Vladimir; Larivain, Angela; Lefkaditou, Eugenia; Lishchenko, Fedor; Rivero, Gonzalo; Matos, Fábio; Marcou, Anna; Maximenko, Darya; Monteiro, Sílvia; Montero, Carlos; Moreno, Ana; Moustahfid, Hassan; Oesterwind, Daniel; Otero, Jaime; Perales-Raya, Catalina; Petroni, Michael; Pierce, Graham; Pita, Cristina; Pita, Pablo; Marie Power, Anne; Roa-Ureta, Ruben; Robin, Jean-Paul; Rocha, Alberto; Roumbedakis, Katina; Sheerin, Edel; Silva, Luis; Sobrino, Ignacio; Smith, Jennifer; Spence, Michael; Valeiras, Julio; Vidoris, Pavlos; Villanueva, Roger; Villasante, Sebastian; Vossen, Kathrin; Zimina, VictoriaWGCEPH worked on six Terms of Reference. These involved reporting on the status of stocks; reviewing advances in stock identification, assessment for fisheries management and for the Ma- rine Strategy Framework Directive (MSFD), including some exploratory stock assessments; re- viewing impacts of human activities on cephalopods; developing identification guides and rec- ommendations for fishery data collection; describing the value chain and evaluating market driv- ers; and reviewing advances in research on environmental tolerance of cephalopods. ToR A is supported by an annual data call for fishery and survey data. During 2019–2021, com- pared to 1990–2020, cuttlefish remained the most important cephalopod group in terms of weight landed along the European North Atlantic coast, while loliginid squid overtook octopus as the second most important group. Short-finned squid remained the least important group in land- ings although their relative importance was almost double in 2019–2022 compared to 1992–2020. Total cephalopod landings have been fairly stable since 1992. Cuttlefish landings are towards the low end of the recent range, part of a general downward trend since 2004. Loliginid squid landings in 2019 were close to the maximum seen during the last 20 years but totals for 2020 and 2021 were lower. Annual ommastrephid squid landings are more variable than those of the other two groups and close to the maximum seen during 1992– 2021. Octopod landings have generally declined since 2002 but the amount landed in 2021 was higher than in the previous four years. Under ToR B we illustrate that the combination of genetic analysis and statolith shape analysis is a promising method to provide some stock structure information for L. forbsii. With the sum- mary of cephalopod assessments, we could illustrate that many cephalopod species could al- ready be included into the MSFD. We further provide material from two reviews in preparation, covering stock assessment methods and challenges faced for cephalopod fisheries management. Finally, we summarise trends in abundance indices, noting evidence of recent declines in cuttle- fish and some octopuses of the genus Eledone. Under ToR C, we describe progress on the reviews of (i) anthropogenic impacts on cephalopods and (ii) life history and ecology. In relation to life history, new information on Eledone cirrhosa from Portugal is included. Under ToR D we provide an update on identification guides, discuss best practice in fishery data collection in relation to maturity determination and sampling intensity for fishery monitoring. Among others, we recommend i) to include the sampling of cephalopods in any fishery that (a) targets cephalopods, (b) targets both cephalopods and demersal fishes or (c) takes cephalopods as an important bycatch, ii) Size-distribution sampling, iii) the use of standardized sampling pro- tocols, iv) an increased sampling effort in cephalopod. Work under ToR E on value chains and market drivers, in conjunction with the Cephs & Chefs INTERREG project, has resulted in two papers being submitted. Abstracts of these are in the report. Finally, progress under ToR F on environmental tolerance limits of cephalopods and climate en- velope models is discussed, noting the need to continue this work during the next cycle.