Article
Environmental Sciences
Anthony Nzioka, Ainara Valencia, Aitor Atxaerandio-Landa, Oihane Diaz de Cerio, Mohammad Amzad Hossain, Maria Korta, Maren Ortiz-Zarragoitia, Ibon Cancio
Summary: This study investigated genes related to apoptosis and autophagy during follicular atresia in European hake. The results showed different implications of apoptotic and autophagic processes during oocyte development. The analyzed genes could serve as biomarkers for early detection of follicular atresia and evaluation of fecundity in fish stocks.
MARINE ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Studies
Yessine Ben Arfa, Antonio Di Cintio, Luca Ceriola, Othmen Jarboui
Summary: The paper summarizes a three-year socio-economic study on the bottom trawl fleet in North Tunisia targeting deep water rose shrimp and European hake. The study found that the fishery's profitability and fragility are highlighted, with a strong reliance on international market demand. The indicators related to demographics and employment suggest a well-performing fishery, but with room for improvement. Factors such as the number of employed fishers, age of the fishing fleet, and number of fishing units accessing the fisheries characterize the fishery and pose challenges to its stability and further development.
Article
Ecology
Chrisoula Apostologamvrou, Maria Vlachou, Alexandros Theocharis, Christos Ntavaros, Dimitris Klaoudatos
Summary: This study provides new insights into the reproductive biology of European hake by analyzing samples from the Aegean Sea. The results show seasonal variations in the reproductive cycle and significant differences in sex ratio and onset of sexual maturity between different size ranges.
REGIONAL STUDIES IN MARINE SCIENCE
(2023)
Article
Ecology
Mauro Sinopoli, Carlo Pipitone, Fabio Badalamenti, Giovanni D'Anna, Fabio Fiorentino, Michele Gristina, Valentina Lauria, Pietro Rizzo, Giacomo Milisenda
Summary: This study evaluates the effects of a trawling ban on the growth of young-of-the-year European hake by comparing size structure, length-weight relationship, condition, and growth in three gulfs along the coast of northern Sicily. The results suggest that the trawling ban has led to larger sizes and better condition and growth in the untrawled gulf.
REGIONAL STUDIES IN MARINE SCIENCE
(2022)
Article
Biodiversity Conservation
Michael J. Roast, Samir Martins, Lourdes Fernandez-Peralta, Jose Carlos Baez, Ahmed Diame, David March, Jazel Ouled-Cheikh, Adolfo Marco, Jacob Gonzalez-Solis, Luis Cardona
Summary: Fisheries bycatch poses a serious threat to sea turtle populations worldwide, especially due to their vulnerability to various fishing gear. In the intensely fished region of the Canary Current, the Cabo Verde loggerhead turtle population lacks a comprehensive assessment integrating bycatch and population management information. By analyzing subpopulation data from Boa Vista Island in Cabo Verde, the study evaluated population viability, estimated regional bycatch rates, and examined nesting trends in relation to bycatch estimates, hatchery conservation measures, and environmental variability. The results indicated that current bycatch mortality rates would lead to the near extinction of the Boa Vista subpopulation, highlighting the urgent need for bycatch reduction efforts and diversified conservation management strategies.
CONSERVATION BIOLOGY
(2023)
Article
Ecology
Sarah Sanderson, Daniel I. Bolnick, Michael T. Kinnison, Rose E. O'Dea, Lucas D. Gorne, Andrew P. Hendry, Kiyoko M. Gotanda
Summary: Most studies focus on changes in population mean trait values and overlook changes in population trait variation. This study comprehensively explores how phenotypic variation is changing in contemporary populations, finding that changes in variation are typically small, but some disturbances or trait types can cause very large changes.
Article
Parasitology
Guzman Diez, Guillem Chust, Eider Andonegi, Marina Santurtun, Carmen Abaroa, Elisabette Bilbao, Arantza Maceira, Inaki Mendibil
Summary: This study analyzed the spatial and temporal variability of Anisakis larvae infection in hake from the North-East Atlantic and identified the potential drivers of such variation. The results showed marked differences in infection levels among different sea areas. Anisakis simplex was the most abundant parasite, and the belly flaps were the most commonly parasitized parts of the flesh.
PARASITOLOGY RESEARCH
(2022)
Article
Agriculture, Dairy & Animal Science
Flor Hernandez, Joshua I. Brown, Marissa Kaminski, Michael G. Harvey, Philip Lavretsky
Summary: The study explores hybridization among introduced feral Rock Pigeon and Eurasian Collared-Dove and native White-winged and Mourning doves in southwestern North America, finding limited evidence of extensive hybridization but detecting six putative contemporary late-stage hybrids involving the Mourning Dove. The research highlights the importance of using multiple marker types to infer complex evolutionary histories and considers important factors when analyzing populations that were recently established or of domestic origins.
Article
Ecology
Valerio Sbragaglia, Pascal P. P. Klamser, Pawel Romanczuk, Robert Arlinghaus
Summary: This study conducted a multigeneration harvest selection experiment using zebrafish as a model species to investigate the effects of size-selective harvesting on shoaling behavior. The results showed that size-selective harvesting influenced the cohesion of shoals, with small-harvested lines forming more cohesive shoals and large-harvested lines forming less cohesive shoals.
AMERICAN NATURALIST
(2022)
Article
Forestry
Watanabe Yoichi, Etsuo Ono, Yoshihiro Tsunamoto, Ayumi Matsuo, Yoshihisa Suyama, Koichi Uehara
Summary: Genetic analysis of two related plant species endemic to Japan, Rhododendron pentaphyllum and R. quinquefolium, showed different closest relatives and times to most recent common ancestors. R. pentaphyllum exhibited higher genetic variation between populations, while both species had similar patterns of genetic divergence. These findings suggest that the similar ranges of the two species are the result of repeated range shifts since speciation during climatic oscillations.
TREE GENETICS & GENOMES
(2021)
Article
Marine & Freshwater Biology
Bruno Lopes da Silva Ferrette, Bruno Mourato, Fabio Hissa Vieira Hazin, Freddy Arocha, Samuel Mackey Williams, Carlos Egberto Rodrigues Junior, Fabio Porto-Foresti, Alberto Ferreira de Amorim, Matheus Marcos Rotundo, Rui Coelho, John P. Hoolihan, Fambaye Ngom Sow, N'guessan Constance Diaha, Evgeny Romanov, Rodrigo Rodrigues Domingues, Claudio Oliveira, Fausto Foresti, Fernando Fernandes Mendonca
Summary: Profound climatic changes since the Miocene have influenced the phylogeography of sailfish worldwide, revealing high genetic diversity and distinct populations among ocean basins. Two deep evolutionary lineages were identified, with implications for the need to re-evaluate management measures due to overfishing risks and high genetic divergence between lineages.
Article
Evolutionary Biology
Sandra Ludwig, Juliana da Silva Martins Pimentel, Leonardo Cardoso Resende, Evanguedes Kalapothakis
Summary: This study evaluated the impact of human interference events on the ecological evolution and population structure of P. costatus. It emphasizes the importance of using integrated methods to understand genetic structure variations for effective conservation programs.
EVOLUTIONARY APPLICATIONS
(2023)
Article
Fisheries
Abdelaziz Mounir, Hassan Alahyane, Mohammed Znari, Nor-Eddine Chouikh
Summary: The reproductive strategy of European hake in the Safi fishing area was investigated in this study. The results showed that European hake breeds throughout the year with two spawning peaks in May-July and October. The size at first sexual maturity was 26.50 cm for males and 27.40 cm for females.
INDIAN JOURNAL OF FISHERIES
(2022)
Article
Genetics & Heredity
V. S. Anoop, Sanil George
Summary: This study investigates the population genetic and demographic structure of the edible frog species Phrynoderma karaavali in India using genetic and population data. The findings suggest that despite the poaching threat, the population is stable or expanding with two major clusters and gene flow occurring despite geographical barriers.
JOURNAL OF GENETICS
(2022)
Article
Anthropology
Jonathan C. K. Wells, Akanksha A. Marphatia, Mario Cortina-Borja, Dharma S. Manandhar, Alice M. Reid, Naomi Saville
Summary: This study explores the factors influencing childbirth complications in rural lowland Nepal from an evolutionary perspective. Findings suggest that short stature and high BMI increase the risks of Cesarean Section (CS) and obstructed labor (OL), while male offspring have higher risks of CS and OL. Additionally, lower wealth and lower husband's education are associated with lower likelihood of episiotomy and CS.
AMERICAN JOURNAL OF HUMAN BIOLOGY
(2021)
Article
Biodiversity Conservation
Joan Moranta, Cati Torres, Ivan Murray, Manuel Hidalgo, Hilmar Hinz, Adam Gouraguine
Summary: The unlimited economic growth associated with capitalism has resulted in significant environmental destruction and biodiversity loss, highlighting the need to address the contradictions between economic growth and biodiversity conservation. Global agendas related to sustainable development have been established since the 1970s, but only in the early 2000s did biodiversity loss become a major focus for environmental researchers. The current global biodiversity agendas, however, do not fully acknowledge the negative impacts of growth-oriented strategies on biodiversity, emphasizing the economic value of biodiversity over its intrinsic importance for ecosystems and human well-being.
CONSERVATION BIOLOGY
(2022)
Article
Fisheries
Guilherme Martins Aragao, Lucia Lopez-Lopez, Antonio Punzon, Elena Guijarro, Antonio Esteban, Encarnacion Garcia, Jose Manuel Gonzalez-Irusta, Julia Polo, Miguel Vivas, Manuel Hidalgo
Summary: Regional differences in climate vulnerability play a crucial role in countries with diverse socio-ecological gradients or geographical segregation. The study developed a climate vulnerability assessment (CVA) focusing on demersal fisheries in Spain, revealing higher vulnerability in the Mediterranean regions due to lower adaptive capacity and higher exposure. Recognizing spatial heterogeneity in the socio-ecological system is essential in developing CVAs as a tool for policymakers and managers to address regional vulnerabilities.
ICES JOURNAL OF MARINE SCIENCE
(2022)
Article
Multidisciplinary Sciences
Marte Sodeland, Sissel Jentoft, Per Erik Jorde, Morten Mattingsdal, Jon Albretsen, Alf Ring Kleiven, Ann-Elin Waroy Synnes, Sigurd Heiberg Espeland, Esben Moland Olsen, Carl Andre, Nils Chr Stenseth, Halvor Knutsen
Summary: Life on Earth has experienced cycles of ecological stasis and disruption, linking biological and geological transitions. Human influences have caused increasing ecological disruption, leading some to argue that we are now in the Anthropocene era. Understanding the drivers of ecological stasis is crucial for intervention and mitigation. The Atlantic cod, a keystone species in the northern Atlantic Ocean, has experienced collapses and ecosystem reshuffling. Whole-genome resequencing revealed that stabilizing selection maintains three supergenes in Atlantic cod, which are linked to species persistence and ecological stasis. Historic population size inference indicates continued declines due to industrialization and commercialization of fisheries.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Environmental Studies
Jan Atle Knutsen, Alf Ring Kleiven, Esben Moland Olsen, Halvor Knutsen, Sigurd Heiberg Espeland, Tonje Knutsen Sordalen, Susanna Huneide Thorbjornsen, Jeffrey A. Hutchings, Albert Fernandez-Chacon, Mats Huserbraten, David Villegas-Rios, Kim Tallaksen Halvorsen, Portia Joy Nillos Kleiven, Thomas Kiland Langeland, Even Moland
Summary: Research shows that reducing fishing pressure in marine protected areas (MPAs) has positive effects globally. In southern Norway, the implementation of lobster reserves has been successful in protecting lobster populations and attracting public attention. The lobster reserves have become an important supplement to traditional fisheries management over the past two decades, with more than 50 reserves established in Norway.
Biographical-Item
Fisheries
Rebekah A. Oomen, Halvor Knutsen, Even Moland, Esben Moland Olsen, Jan Atle Knutsen, Louis Bernatchez, Nils Chr. Stenseth, Paul Hart
FISH AND FISHERIES
(2022)
Article
Ecology
Alexander Sadykov, Keith Farnsworth, Dinara Sadykova, Nils C. Stenseth
Summary: Fluctuations in wild fish populations are influenced by the interaction between population dynamics and environmental forcing. The effects of these fluctuations can be magnified or dampened by age-structured populations based on life cycle and species traits. A generalized transfer function (TF) was derived in this study to investigate the fluctuations of fish populations in response to species traits and environmental noise characteristics. The results showed that for semelparous species, fluctuations in fish stocks are directly proportional to recruitment elasticity and inversely proportional to the age of maturity, while for iteroparous species, fluctuations in fish stocks are inversely proportional to the adult lifespan. In addition to the previously known cohort resonance effect, a stock resonance effect was also discovered, which increased the sensitivity to environmental fluctuations on double cohort timescales in the inelastic range of recruitment elasticity.
POPULATION ECOLOGY
(2022)
Article
Multidisciplinary Sciences
Alf Ring Kleiven, Sigurd Heiberg Espeland, Stian Stiansen, Kotaro Ono, Fabian Zimmermann, Esben Moland Olsen
Summary: Fishery-dependent data are crucial for management decisions, but technological creep can lead to biased inferences. This study examines the impact of trap improvement on a European lobster fishery, revealing a significant decline in lobster abundance over nine decades. The findings highlight the importance of standardization, including technological development, when using commercial data for monitoring and managing data-limited fisheries.
SCIENTIFIC REPORTS
(2022)
Article
Marine & Freshwater Biology
Mehis Rohtla, Even Moland, Anne Berit Skiftesvik, Eva B. Thorstad, Sebastian Bosgraaf, Esben M. Olsen, Howard I. Browman, Caroline M. F. Durif
Summary: Like many animals, the northern temperate eel can enter a dormancy-like state during the winter. The timing of dormancy is mainly related to photoperiod and less to temperature. In a fjord in Southern Norway, the European eel exhibited dormancy from late October or November until mid-April, with over 50% of eel becoming dormant when day length was less than 9 hours.
ESTUARINE COASTAL AND SHELF SCIENCE
(2022)
Article
Fisheries
Oystein Langangen, Jan Ohlberger, Leif Christian Stige, Remi Patin, Lucie Buttay, Nils Christian Stenseth, Kotaro Ono, Joel M. Durant
Summary: Mass mortality events, caused by diseases, extreme weather, etc., are prevalent and increasing globally. However, the population-level effects of mass mortality in early life, such as reduced total population biomass, are not fully explored. We analyzed 40 fish species using population dynamics models and found that population impacts vary greatly between years and species. Short-lived species with low compensatory density dependence and high interannual survival variation experience the strongest impacts. This research allows predicting the potential impacts of mass mortality events based on species' life history, which is critical considering the increasing frequency and severity of these events worldwide.
FISH AND FISHERIES
(2023)
Article
Fisheries
J. Otero, M. Hidalgo
Summary: This study evaluates the influence of life-history traits and the environment on the demography and the response to exploitation and climate for 14 populations of Small pelagic fish (SPF) occurring in the European Atlantic Seas. The results highlight the importance of recruitment for the population growth of SPFs and illustrate how the contribution of recruitment varies among and within populations as a function of environmental conditions and life-history traits defining an ordination of SPFs along a slow-fast continuum with implications for population dynamics and the responses to endogenous and exogenous factors.
ICES JOURNAL OF MARINE SCIENCE
(2023)
Article
Biology
Jan Ohlberger, Timothy J. Cline, Daniel E. Schindler, Bert Lewis
Summary: Declining body sizes of Pacific salmon are primarily caused by competition at sea, rather than ocean warming or other ecological factors. Changes in size-at-age were the dominant cause of body size declines. Warm winters were associated with better growth of sockeye salmon, whereas warm summers were associated with reduced growth.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2023)
Article
Ecology
Christopher T. Monk, Michael Power, Carla Freitas, Philip M. Harrison, Michelle Heupel, Anna Kuparinen, Even Moland, Colin Simpfendorfer, David Villegas-Rios, Esben M. Olsen
Summary: This study investigated the correlation between behavior type and diet in a protected population of Atlantic cod. By using acoustic telemetry and stable isotope compositions, the researchers determined the behavior and diet of the cod. The study further explored whether there were survival costs associated with behavior and diet.
JOURNAL OF ANIMAL ECOLOGY
(2023)
Article
Biodiversity Conservation
Lucie Buttay, Jan Ohlberger, Oystein Langangen
Summary: Mass mortality events during early life stages of fish can have long-term effects on population abundance and economic activity. Adaptive fishery management strategies, such as reductions in fishing mortality, can help mitigate economic impacts and ensure sustainable resource use. Our simulation using a life cycle model on Northeast Arctic cod demonstrated that fishing reductions applied immediately after a disturbance and during high mean age and high total stock biomass can increase expected catches over 10 years.
JOURNAL OF APPLIED ECOLOGY
(2023)
Article
Engineering, Ocean
Audrey M. Darnaude, Yael Teff-Seker, Federica Costantini, Susanne Tanner, Anna Sturrock, Lucia Lopez-Lopez, Manuel Hidalgo, Maria Beger, Ant Turkmen, Myron Peck, Filip Volkaert, Ewan Hunter
Summary: SEA-UNICORN is an international research coordination initiative that aims to establish a globally harmonized framework for sustainable blue economy and ocean conservation. It promotes worldwide collaboration among scientists and policymakers by coordinating the collection, sharing, and application of knowledge on marine connectivity.
MARINE TECHNOLOGY SOCIETY JOURNAL
(2022)
