Article
Engineering, Marine
Shoou-Jeng Joung, Zhi-Yu Hsu, Kuan-Yu Su, Kwang-Ming Liu
Summary: The age and growth of spot-tail shark in the Taiwan Strait were estimated based on the analysis of 327 specimens captured from 2010 to 2011 and 2019 to 2021. Sex-specific weight-length relationships were observed, and the deposition period of growth band pairs in vertebrae was determined to be 1 year. The Gompertz and von Bertalanffy growth function best described the length-at-age data for females and males, respectively.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
M. Lounis, O. Torrealba-Rodriguez, R. A. Conde-Gutierrez
Summary: This study aimed to predict the number of COVID-19 cases, deaths and recoveries in Algeria using reported data, comparing four models and finding that the logistic model had the best precision in predicting cases.
RESULTS IN PHYSICS
(2021)
Article
Ecology
Yngvild Vindenes, Rolf Langvatn, Atle Mysterud
Summary: Large mammals at northern latitudes experience seasonal cycles of body mass gain and loss, which vary across ontogeny depending on trade-offs between growth and other life history traits. However, there is currently no detailed model of how this seasonal growth develops. In this study, a new seasonal growth model was developed and applied to body mass data from captive red deer in Norway. The best fitting model included two seasonal components and revealed that the timing of the annual peak shifts through ontogeny, with males growing bigger and showing larger seasonal amplitudes compared to females. This new growth model provides a flexible framework for studying seasonal growth in different species.
Article
Biology
Michael R. Kearney
Summary: Metabolic theory aims to address ecological and evolutionary issues by incorporating physical principles of energy and mass exchange, with individual growth models being the fundamental basis. There is confusion and controversy surrounding the origins, application, logical consistency, and realism of these models. Putter's original insights have influenced subsequent growth theories, such as von Bertalanffy's and the DEB theory, leading to advancements in understanding metabolic patterns at the individual level.
BIOLOGICAL REVIEWS
(2021)
Article
Mathematical & Computational Biology
Masakazu Onitsuka
Summary: The purpose of this study is to apply conditional Ulam stability theory to the von Bertalanffy growth model and investigate the biological significance of the Ulam constant found in the model using numerical simulations.
MATHEMATICAL BIOSCIENCES AND ENGINEERING
(2022)
Article
Environmental Sciences
Shui-Kai Chang, Tzu-Lun Yuan, Simon D. Hoyle, Jessica H. Farley, Jen-Chieh Shiao
Summary: This study reviews the aging data and growth parameters of four flyingfish species in Taiwan, estimating two spawning seasons per year and length-weight relationships for each species. Multiple growth models were examined, showing the most optimal model for sex-combined data and sex-specific cases.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
Jose Ernandes Rufino de Sousa, Debora Andrea Evangelista Facanha, Luis Alberto Bermejo, Josiel Ferreira, Renato Diogenes Macedo Paiva, Samuel Freitas Nunes, Maria do Socorro Medeiros de Souza
Summary: This study evaluated the growth curve of Caninde goats and found that the Brody model was the most suitable for representing the average growth curve. The models showed that the Brody model had the best fit, indicating a strong association between observed and estimated weights, suggesting its potential use in describing the growth behavior and development of both male and female animals.
TROPICAL ANIMAL HEALTH AND PRODUCTION
(2021)
Article
Environmental Sciences
Kwang-Ming Liu, Chiao-Bin Wu, Shoou-Jeng Joung, Wen-Pei Tsai, Kuan-Yu Su
Summary: This study used a multi-model approach to determine the best-fit growth models for different species of elasmobranchs, taking into account their life history traits and characteristics.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Mathematics, Applied
Mehmet Korkmaz
Summary: This study examines the impact of growth models with four parameters on the choice of appropriate growth models, finding that models with four parameters have better results and can be used in addition to traditional growth models. Furthermore, exploring other growth models with four parameters may lead to better model choices.
NUMERICAL METHODS FOR PARTIAL DIFFERENTIAL EQUATIONS
(2021)
Article
Multidisciplinary Sciences
Ignacio Heredia Cacha, Judith Sainz-Pardo Diaz, Maria Castrillo, Alvaro Lopez Garcia
Summary: This study evaluated the use of an ensemble of population and machine learning models to predict the COVID-19 pandemic in Spain using only public datasets. Machine learning models were trained using incidence data and classical ODE-based population models were adjusted to capture long term trends. A novel approach was used by combining these models to improve robustness and accuracy. However, adding more input features did not improve the overall ensemble due to different prediction patterns among model families. Machine learning models also degraded with the emergence of new COVID variants. The study concluded that the ensemble of machine learning and population models shows promise as an alternative to SEIR-like compartmental models.
SCIENTIFIC REPORTS
(2023)
Article
Mycology
Djanira Rodrigues Negrao, Martha Maria Mischan, Sheila Zambello de Pinho, Lidia Raquel de Carvalho, Rafaela Lancas Gomes, Jose Raimundo de Souza Passos
Summary: This study aimed to model mycelial growth in a factorial experiment with two species of white rot fungi growing at five temperatures. The Gompertz and von Bertalanffy mixed-effects models were better adjusted, with temperature showing significant linear and quadratic effects on growth velocity in each species.
Article
Fisheries
Li'ang Yang, Lijuan Wang, Zhihao Wu, Zhiyu Hao, Zongcheng Song, Feng You, Runqing Yang
Summary: The study on genetic effects of inbreeding on growth trajectories in turbot revealed that inbreeding had a larger impact on body length compared to body weight and body width. The genetic effects were not linear with increasing inbreeding degrees and varied depending on the age of the fish. Additionally, there were low genetic correlations between growth traits in early growth days and later growth days.
Article
Chemistry, Multidisciplinary
Samuel Ruiz-Arrebola, Damian Guirado, Mercedes Villalobos, Antonio M. Lallena
Summary: Based on data generated with a Monte Carlo agent-based model, different classical mathematical models were analyzed for their ability to describe the growth of multicellular spheroids. The results indicated that the Gompertz model outperformed other models in terms of overall fitting and predictive power.
APPLIED SCIENCES-BASEL
(2021)
Article
Agriculture, Dairy & Animal Science
Mohammad Afrouziyeh, Rene P. Kwakkel, Martin J. Zuidhof
Summary: This study evaluates different NLMM using birds from two heritage chicken lines and determines that the model with both random coefficients is the most parsimonious based on assessment of serial correlation of the residuals. NLMM coefficients allow stochastic prediction of mean age and its variation, providing unique decision support modeling applications.
Article
Agronomy
Qinglin Li, Hongyan Gao, Xiaodong Zhang, Jiheng Ni, Hanping Mao
Summary: This study aimed to describe the sigmoidal growth behavior of a lettuce canopy using three nonlinear models. The grey Verhulst models showed a better fit for the growth of TPCA and TPCP, while the Logistic model fit better for changes in PH. The growth stages and critical points were determined, providing a detailed description of the lettuce's growth behavior.
Article
Fisheries
Frederik Kaiser, Hans-Joachim Harloff, Ralf-Peter Tressel, Dominik Steffens, Henrike Seibel, Christian Jung, Carsten Schulz
Summary: This study found that dietary phytic acid significantly affects the growth performance and whole body composition of fish. Supplementing lower concentrations of phytic acid can significantly improve growth performance, but higher concentrations can reduce voluntary feed intake and subsequently growth performance. In contrast, supplementation with glucosinolates had no significant effect on these parameters.
Article
Fisheries
Lina Weirup, Carsten Schulz, Henrike Seibel, Johan Aerts
Summary: Suboptimal farm management can lead to chronic stress and external morphological damage in fish, especially in the fins. Factors related to management and water quality are associated with fin injuries and scale cortisol levels.
Article
Fisheries
Frederik Kaiser, Hans-Joachim Harloff, Ralf-Peter Tressel, Amelie Lara Grassl, Florian Parsche, Carsten Schulz
Summary: The study found that although highly purified rapeseed protein products have high digestibility rates, they can still impact growth performance when used as fish meal substitutes in rainbow trout diets, and encapsulating feeds or supplementing with free amino acids cannot alleviate these effects.
AQUACULTURE REPORTS
(2021)
Article
Fisheries
Jan Giebichenstein, Julia Giebichenstein, Mario Hasler, Carsten Schulz, Bernd Ueberschaer
Summary: This study aimed to compare the performance of four different microdiets in an early weaning protocol with the standard Artemia-based feeding. The results showed that while one microdiet outperformed the others, larvae fed with Artemia only still yielded the best results in terms of growth, survival, and deformities.
AQUACULTURE RESEARCH
(2022)
Review
Fisheries
Frederik Kaiser, Harvey Harbach, Carsten Schulz
Summary: The aquaculture sector is essential in global fish production to meet the increasing demand for high-quality food, but alternative sources to fishmeal are needed due to sustainability concerns. Rapeseed proteins have been recognized as valuable substitutes for fishmeal in aqua feeds, with a balanced amino acid composition and cost-effective cultivation. Further research is needed to fully understand the benefits and effectiveness of rapeseed proteins in aqua feeds.
REVIEWS IN AQUACULTURE
(2022)
Article
Fisheries
Lina Weirup, Alexander Rebl, Carsten Schulz, Henrike Seibel
Summary: The welfare of rainbow trout in aquaculture settings was studied using gene expression analysis and other welfare indicators. The study found significant differences in welfare indicators and gene expression profiles among farms with different environmental and management conditions. Farms with high water supply, fast water exchange, and lower stocking densities showed lower levels of external morphological damage in the fish.
Correction
Fisheries
J. Zimmermann, K. Steinberg, C. Hund, S. Meyer, C. Schulz
AQUACULTURE INTERNATIONAL
(2022)
Article
Fisheries
Henrike Seibel, Ksenia Krassilnikova, Finn-Thorbjorn Fichtner-Grabowski, Alexander Rebl, Carsten Schulz, Stephanie Celine Hornburg
Summary: Substituting fishmeal in fish feed is important for sustainability. This study investigates the effects of a plant-protein based diet on the immune markers in rainbow trout. The results show significant expression differences between diets under handling stress, highlighting the importance of monitoring fish performance under challenging conditions.
AQUACULTURE RESEARCH
(2022)
Article
Fisheries
Frederik Kaiser, Michael Schlachter, Carsten Schulz, Claudia Figueiredo-Silva
Summary: Sustainable aqua feeds are essential for the future development of the aquaculture sector, especially considering limited mineral supply from animal-based sources. This study evaluated the effects of chromium DL-methionine supplementation in the nutrition of African catfish. The results showed that supplementation with 0.2 mg Cr kg(-1) and 0.4 mg Cr kg(-1) significantly increased the specific growth rate of the fish, suggesting that organic chromium supplementation is a viable and safe way to improve the growth performance of African catfish.
AQUACULTURE NUTRITION
(2023)
Article
Biochemistry & Molecular Biology
Philipp Segler, Klaus Heinrich Vanselow, Michael Schlachter, Mario Hasler, Carsten Schulz
Summary: Rising global temperatures have increased the need for detailed understanding of the effects of temperature on aquaculture animals. In this study, rainbow trout were used to investigate the interactions between feeding, temperature, and key metabolic variables. The results showed that the specific dynamic action (SDA) coefficient of rainbow trout is highly dependent on environmental temperature.
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY
(2023)
Article
Fisheries
Philipp Segler, Klaus Heinrich Vanselow, Michael Schlachter, Mario Hasler, Frederik Kaiser, Carsten Schulz
Summary: The authors conducted a bioenergetic study on rainbow trout to determine the optimal thermal condition for the protein-sparing effect at different water temperatures.
JOURNAL OF FISH BIOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Philipp Segler, Klaus Heinrich Vanselow, Michael Schlachter, Mario Hasler, Frederik Kaiser, Carsten Schulz
Summary: With increasing global temperatures, it is important to investigate how fish energy metabolism responds to different thermal conditions. In this study, the use of carbohydrate and lipid in fish diets was investigated under various thermal regimes. The results showed that diets with carbohydrate as the main energy substrate had higher specific dynamic action values at temperatures around the optimum, indicating the nutritional value of carbohydrates, especially at lower temperatures.
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY
(2023)
Article
Fisheries
Sven Wuertz, Carsten Schulz, Simon Klatt, Wibke Kleiner, Jan P. Schroeder
Summary: Ozone produced oxidants (OPO) are secondary oxidants formed during the disinfection process in recirculating aquaculture systems. This study investigates the impact of OPO on juvenile tilapia and finds that adverse effects are observed at a concentration as low as 0.05 mg/L, with severe impact recorded at 0.1 mg/L chlorine equivalents. Therefore, it is important to keep OPO concentrations below 0.05 mg/L chlorine equivalents to avoid adverse effects on animal welfare.
AQUACULTURE REPORTS
(2023)
Article
Microbiology
Marvin Suhr, Finn-Thorbjoern Fichtner-Grabowski, Henrike Seibel, Corinna Bang, Andre Franke, Carsten Schulz, Stephanie Celine Hornburg
Summary: The study aimed to investigate the effects of handling stress on the gut microbiota of rainbow trout fed a plant-based diet. The results showed that handling stress had a significant impact on the microbial composition of different genetic trout lines, while it had no significant effect on microbial diversity and fish performance.
Article
Fisheries
Henrike Seibel, Elvis Chikwati, Carsten Schulz, Alexander Rebl
Summary: This study evaluated the welfare of rainbow trout under inadequate husbandry conditions by assessing a diverse range of feeding stress markers. Soybean meal-induced enteritis was observed in rainbow trout, along with changes in blood parameters and gene expression. The findings provide valuable information for monitoring feeding regimens and developing detection devices in aquaculture.