Article
Marine & Freshwater Biology
Katerina Charitonidou, Olav Sigurd Kjesbu, Cristina Nunes, Maria Manuel Angelico, Rosario Dominguez-Petit, Dolores Garabana, Konstantinos Ganias
Summary: This study investigated the connection between the dynamic organization of the ovary and spawning dynamics in pelagic fishes. Various laboratory methods and statistical approaches were applied to gonadal samples from three commercial fish species in the NE Atlantic. The study found that attributes of ovarian dynamics, such as oocyte size frequency distribution and the number of oocyte cohorts, were related to spawning interval and oocyte growth rate. The study also showed that indeterminate spawners can exhibit different proportions of oocytes based on the seasonal pattern of oocyte recruitment. These findings suggest that determinacy and indeterminacy should be viewed as endpoints on a continuum controlled by the overlap between oocyte recruitment and spawning period. The study's findings have important implications for biomass assessments of commercial fish stocks.
Review
Fisheries
Kristina Horkova-Zitnanova, Kristina Svolikova, Danka Harustiakova, Vladimir Kovac
Summary: Fish exhibit diverse reproductive strategies, making fecundity evaluation challenging. Freshwater fish lack a unified concept of terminology and definitions. Variability in existing methods creates bias in comparative studies, highlighting the need for standardization.
REVIEWS IN FISHERIES SCIENCE & AQUACULTURE
(2021)
Article
Fisheries
Eleni Servou, Eudoxia Schismenou, Stylianos Somarakis
Summary: This study examined the oocyte recruitment and development pattern of the European sardine, a commercially important fish with indeterminate fecundity. The study found that the recruitment and development of oocytes remained stable throughout the spawning season, with the final maturation of the advanced batch triggering the recruitment of new oocytes and the deposition of yolk in primary vitellogenic oocytes. This study provides important information for understanding reproduction and its drivers in fish with indeterminate fecundity at the individual and population level.
Article
Fisheries
Hiroshi Ashida, Yukio Ishihara, Shuuyo Watanabe, Seiji Ohshimo, Yosuke Tanaka
Summary: The present study aimed to reassess the spawning fraction (SF) of the Pacific bluefin tuna in the Sea of Japan by determining the duration of spawning markers in the ovaries. The observations of postovulatory follicles showed that they were present up to 38.5 hours after ovulation. The revisited SF values were smaller than the previously estimated SF in the Sea of Japan.
FISHERIES RESEARCH
(2023)
Review
Oncology
Sarah C. Reed, Sarah Croessmann, Ben Ho Park
Summary: Clonal hematopoiesis of indeterminate potential (CHIP) is the expansion of leukemia-associated somatic mutations in healthy individuals, which can lead to increased risk of hematologic malignancy, cardiovascular disease, and mortality. Recent research has found high rates of CHIP in patients with solid tumors and suggests a potential role in inflammation and solid tumor biology.
CLINICAL CANCER RESEARCH
(2023)
Article
Business, Finance
Andrea Bellucci, Alexander Borisov, Germana Giombini, Alberto Zazzaro
Summary: This paper explores the empirical relationship between interest rate and collateral requirements in bank loan contracts using various estimation methods. It finds that there is a positive reciprocal association between interest rate and collateral, but the effect of interest rate on collateral is stronger than the effect of collateral on interest rate. The study highlights the importance of considering the endogenous nature of contract terms in empirical work.
FINANCE RESEARCH LETTERS
(2021)
Article
Environmental Sciences
Alvaro Lorenzo-Felipe, Hyun Suk Shin, Sergio Leon-Bernabeu, Cathaysa Perez-Garcia, Maria Jesus Zamorano, Jaume Perez-Sanchez, Juan Manuel Afonso-Lopez
Summary: The quality of fish eggs plays a key role in fertilization and embryo development. Genetic background and environmental factors affect spawning quality and larval survival of breeders, especially during the intermediate spawning periods.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Physiology
Bouricha Molka, Bourdenet Gwladys, Bosquet Dorian, Moussot Lucie, Benkhalifa Mustapha, Cabry Rosalie, Gubler Brigitte, Khorsi-Cauet Hafida, Benkhalifa Moncef
Summary: Growth hormone (GH), insulin growth factor I (IGF1), and interleukin-6 (IL-6) in follicular fluid are associated with oocyte quality, with GH appearing to be the best biomarker for this quality.
FRONTIERS IN PHYSIOLOGY
(2022)
Article
Genetics & Heredity
Veronique Bellemare, Keren Rotshenker-Olshinka, Laura Nicholls, Alyson Digby, Amrita Pooni, Einav Kadour-Peero, Weon-Young Son, Michael H. Dahan
Summary: The study aimed to assess the potential of oocytes from hyperresponding polycystic ovary syndrome (PCOS) patients to develop into blastocysts. The findings showed that there were no significant differences between PCOS patients and high-responder controls in terms of oocyte collection, fertilization, blastulation rates, and pregnancy rates.
JOURNAL OF ASSISTED REPRODUCTION AND GENETICS
(2022)
Article
Agriculture, Dairy & Animal Science
Samet Soyalp, Evan Hartono, Owen W. Willems, Xuechun Bai, Benjamin J. Wood, Samuel E. Aggrey, Romdhane Rekaya
Summary: The study aimed to investigate the potential non-linear relationship between growth and walking ability in commercial turkeys. Phenotypic data including body weights and walking ability at different ages were collected. The results showed that there is a possibility for genetic improvement of walking ability and a high genetic correlation between adjacent growth rate quartiles. The variations in walking scores and genetic correlations across growth rate quartiles suggest a potential non-linear relationship between growth and mobility, indicating that factors other than growth may affect walking ability.
Article
Engineering, Electrical & Electronic
P. Banerjee, S. C. Srivastava, Anurag K. Srivastava
Summary: This work presents a method for accurately estimating phasors for M class phasor measurement units (PMUs). The method involves filtering the aliased signal by performing model order estimation for different data windows and sampling frequencies. The estimated model order is then used to estimate the fundamental phasor and the derivatives of amplitude and phase using the TLS-ESPRIT method. The performance of the estimation is evaluated in the presence of noise and compared with previous work in the literature.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Engineering, Chemical
Andreas Hakansson
Summary: The use of global methods in estimating local breakup frequencies in industrial devices is discussed in this study. The results show that global methods provide valid estimates as long as the dissipation rate of turbulent kinetic energy is fairly homogenous. However, in cases of inhomogeneous breakup frequencies, global estimates may underestimate local frequencies, with a constant relative error observed across conditions. This suggests that global methods are still valuable for studying how local breakup frequencies scale across different operating conditions, geometries, and fluid properties.
Article
Entomology
Muhammad Asif Qayyoum, Zi-Wei Song, Bilal Saeed Khan, Muhammad Irfan Akram, Muhammad Zeeshan Shabbir, Izhar Hussain, Bao-Xin Zhang, Yuan Zheng, Dun-Song Li
Summary: The study found that Neoseiulus cucumeris is the most suitable predatory mite for controlling Panonychus citri, with higher attack rate and reproductive potential compared to other predators.
EGYPTIAN JOURNAL OF BIOLOGICAL PEST CONTROL
(2021)
Article
Engineering, Marine
Ali A. Rostam-Alilou, Chunwei Zhang, Fatemeh Salboukh, Onur Gunes
Summary: This study explores the use of Bayesian Networks (BNs) to estimate the technical relationships among structural dynamic responses of a floating spar-type offshore wind turbine tower. By recording rotational dynamic responses in different loading scenarios, BN models are created to observe the probabilistic interactions with the effects of all involving parameters in the rotational vibration of the tower. These models can be used as decision-support tools to predict the relationships and interactions among the dynamic responses of the floating turbine's tower.
Article
Integrative & Complementary Medicine
Hideaki Hasuo, Hideki Ishikawa, Hiromichi Matsuoka
Summary: Resonant frequency breathing is a relaxation coping skill that varies among individuals and may be correlated with height in patients with incurable cancers. The study found a significant difference in resonant frequencies at different height values.
COMPLEMENTARY THERAPIES IN MEDICINE
(2021)
Article
Environmental Sciences
Yorgos Stratoudakis
Summary: Fisheries co-management policy and research have been widely reported with varying results. The proliferation of co-management mechanisms worldwide, based on fisher participation in resource management, can enhance decision-making authority, reduce transaction costs, and improve compliance. The concept of legitimacy is crucial in fisheries co-management and its relevance can be strengthened by studying decision-making congruence with fishers' expectations, funders' evaluations on environmental stewardship, among other factors.
ENVIRONMENTAL SCIENCE & POLICY
(2021)
Article
Reproductive Biology
Katerina Charitonidou, Kostas Ganias
Summary: The study introduces a new method for grouping fish oocytes into different cohorts based on the characteristics of cytoplasmic structures, allowing for a more accurate distinction between developmental stages and better understanding of ovarian dynamics. Using sardines as a case study, the research identified successive recruitment of up to five oocyte cohorts, offering new insights into the spawning process. Overall, this method represents an improved tool for studying species with complex ovarian dynamics.
Article
Fisheries
Foivos A. Mouchlianitis, Georgia Kalaitzi, Periklis Kleitou, Ioannis Savva, Demetris Kletou, Kostas Ganias
Summary: The study provides evidence of successful spawning and detailed analysis of ovarian dynamics of lionfish Pterois miles in the Mediterranean Sea. Results suggest a prolonged oocyte recruitment and development season, with spawning primarily occurring during summertime. Multiple oocyte batches are released per spawning season, with potential inhibition of year-round spawning activity due to seasonal variations in water temperature.
JOURNAL OF FISH BIOLOGY
(2022)
Article
Anatomy & Morphology
Katerina Charitonidou, Emmanuel Panteris, Kostas Ganias
Summary: The ultrastructure of oocyte mitochondria and their contribution to the endogenous autosynthesis of the yolk was investigated in two clupeoid species, the Mediterranean sardine and the European anchovy. The structure and abundance of mitochondria differed between the two species during different stages of oocyte development. Mitochondria in sardine oocytes were found to play a role in the formation of yolk granules, while mitochondria in anchovy oocytes were involved in the lipid synthesis pathway.
JOURNAL OF MORPHOLOGY
(2022)
Article
Ecology
Konstantinos Ganias, Irini-Fotini Kompogianni
Summary: The study assessed the fecundity pattern of common cuttlefish in Thermaikos Gulf in the eastern Mediterranean. It found that potential fecundity varied seasonally, with the highest values at the beginning of spawning, gradually decreasing thereafter. The pattern of cuttlefish fecundity displayed similarities with the 'determinate fecundity' pattern of fishes, with spent females retaining small reserves of secondary growth oocytes that will not be spawned.
MARINE BIOLOGY RESEARCH
(2021)
Article
Fisheries
Foivos A. Mouchlianitis, Eric T. Schultz, Kostas Ganias
Summary: This study analyzed the differences between landlocked and anadromous populations of Alewife in terms of reproductive allocation and energy investment. The results showed that landlocked Alewives maintained a consistent spawning batch throughout the season, while anadromous Alewives gradually reduced their spawning batch. The evolutionary change in reproductive investment can be attributed to changes in the availability of zooplankton prey and feeding opportunities after landlocking.
ECOLOGY OF FRESHWATER FISH
(2022)
Article
Fisheries
Katerina Charitonidou, Emmanuel Panteris, Kostas Ganias
Summary: In this study, the Balbiani body (Bb) in primary growth phase oocytes of two fish species, Sardina pilchardus and Engraulis encrasicolus, were examined for the first time. The ultrastructural observations revealed a distinct spherical Bb in both species, with differences in the cytoplasm. After the disassembly of the Bb, a prominent cytoplasmic zonation developed in the secondary growth oocytes of both species, although with different organelle distribution. These cytoplasmic characteristics can be observed in histological sections and can serve as indicators of maturity or imminent spawning period, providing a valuable tool for applied fisheries biology.
JOURNAL OF FISH BIOLOGY
(2022)
Article
Marine & Freshwater Biology
Katerina Charitonidou, Olav Sigurd Kjesbu, Cristina Nunes, Maria Manuel Angelico, Rosario Dominguez-Petit, Dolores Garabana, Konstantinos Ganias
Summary: This study investigated the connection between the dynamic organization of the ovary and spawning dynamics in pelagic fishes. Various laboratory methods and statistical approaches were applied to gonadal samples from three commercial fish species in the NE Atlantic. The study found that attributes of ovarian dynamics, such as oocyte size frequency distribution and the number of oocyte cohorts, were related to spawning interval and oocyte growth rate. The study also showed that indeterminate spawners can exhibit different proportions of oocytes based on the seasonal pattern of oocyte recruitment. These findings suggest that determinacy and indeterminacy should be viewed as endpoints on a continuum controlled by the overlap between oocyte recruitment and spawning period. The study's findings have important implications for biomass assessments of commercial fish stocks.
Article
Marine & Freshwater Biology
Maria Garagouni, Georgia Avgerinou, George Minos, Kostas Ganias
MARINE MAMMAL SCIENCE
(2022)
Article
Fisheries
Maria Garagouni, Georgia Avgerinou, Foivos-Alexandros Mouchlianitis, George Minos, Konstantinos Ganias
Summary: In this study, losses caused by bottlenose dolphin depredation in a coastal gillnet fishery in Thermaikos Gulf, Greece, were quantified. Experimental fishing efforts and questionnaire surveys were conducted over two seasons to measure the frequency of depredation, changes in catch per unit effort (CPUE), and damages to catch and gear. The results showed that depredation frequency was approximately 35%, resulting in a significant decrease in CPUE by 45-50%. The number of damaged fish in experimental hauls significantly increased with dolphin depredation, suggesting that a large number of fish were completely removed from the nets. The study also revealed that the presence and group size of bottlenose dolphins were associated with increased damages to the experimental nets.
ICES JOURNAL OF MARINE SCIENCE
(2022)
Article
Fisheries
Katerina Charitonidou, Emmanuel Panteris, Kostas Ganias
Summary: This study examined the dynamics of early oogenesis in two Clupeiform fishes, the Mediterranean sardine and the European anchovy, and found differences in oogonial proliferation and meiotic activity, which may be attributed to seasonal patterns of energy allocation to reproduction and the synchronization between feeding and the spawning season.
JOURNAL OF FISH BIOLOGY
(2023)
Editorial Material
Environmental Studies
Yorgos Stratoudakis, Miguel Caetano, Claudia Afonso, Catia Bartilloti, Antonina dos Santos, Pedro Terrinha, Ivone Figueiredo, Miguel Miranda, Jose Lino Costa, Isabel Cacador, Vanessa Fonseca, Paula Chainho, Ricardo Melo, Bernardo Quintella, Maria Jose Costa, Andre B. Fortunato, Paula Freire, Marta Rodrigues, Luis Portela, Miguel Bessa Pacheco, Joaquim Pombo, Carla Palma, Anabela Oliveira, Antonio Goncalves Tavares, Filipe Porteiro, Ines Metelo, Jose Sa Fernandes, Maria da Conceicao, Henrique Cabral, Marina Cunha, Christopher Pham, Ines Carvalho
Summary: This report summarizes the current threats to the Tagus estuary and adjacent ecosystems, and presents prioritized actions to maintain or improve ecosystem services for a densely populated area near the deep ocean.
Article
Fisheries
Yorgos Stratoudakis, Carlos Antunes, Claudia Correia, Ana Filipa Belo, Pedro R. Almeida
Summary: A questionnaire survey of small-scale estuarine and inland fisheries in the NW Iberian Peninsula reveals differences in governance and fisheries management, but similar patterns of exploitation. The importance of fishing revenue, professional exclusivity, and geographic mobility declines upstream. Intangible contact with nature is valued across rivers. Although there is a long tradition and generational continuity in the fishing profession, signs of diminishing hand-over to younger generations are detected. Fishers perceive environmental degradation and overexploitation.
REVIEWS IN FISH BIOLOGY AND FISHERIES
(2023)
Article
Fisheries
Foivos A. Mouchlianitis, Eric T. Schultz, Thassya C. dos Santos Schmidt, Justin P. Davis, Kostas Ganias
Summary: The study on ovarian dynamics of anadromous blueback herring in Connecticut River reveals characteristics of determinate fecundity, with the recruitment intensity of oocytes decreasing gradually across different spawning phases, possibly as an adaptation to the high energetic expenditure of upstream spawning migration.
JOURNAL OF APPLIED ICHTHYOLOGY
(2021)
Article
Fisheries
Evangelos Konstantinidis, Costas Perdikaris, Christos Batzios, Basile Michaelidis, Konstantinos Ganias
Summary: A tool has been proposed in this study to estimate the annual production capacity of fish cage farms based on cage dimensions, and validated by actual sales data. This tool could help obtain more realistic aquaculture production statistics and assist managerial decisions on farm level.
JOURNAL OF APPLIED AQUACULTURE
(2021)