Article
Environmental Sciences
Daniel Barton, Marek Brabec, Zuzana Sajdlova, Allan T. Souza, Jindrich Duras, David Kortan, Petr Blabolil, Lukas Vejrik, Jan Kubecka, Marek Smejkal
Summary: The study found that hydropeaking has negative effects on fish detection at the spawning ground of rheophilic fish, including factors such as flow changes, water temperature, time of the day, and individual fish ID. Hydropeaking resulted in changes in spawning behavior of rheophilic fish, and it is recommended to reduce the impact of hydropeaking during the spawning season for conservation purposes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Agriculture, Dairy & Animal Science
Przemyslaw Piech, Roman Kujawa
Summary: Human actions have caused severe biological imbalances and led to a considerable reduction in the population of wild animals. Efforts to protect endangered species and develop reproduction methods for rare species are crucial for maintaining ecological balance. The blue bream in Europe is one such species that requires protection and biotechnology development for its conservation.
Article
Environmental Sciences
Daniel Barton, Zuzana Sajdlova, Tomas Kolarik, Jan Kubecka, Jindrich Duras, David Kortan, Marek Smejkal
Summary: Rheophilic fishes are declining rapidly in number due to various habitat modifications and discharge regulations. Installing a flow deflector can mitigate the effects of discharge increases on a spawning ground, resulting in higher recruitment of rheophilic fishes.
RIVER RESEARCH AND APPLICATIONS
(2023)
Article
Ecology
Daniel Barton, Felipe Breton, Petr Blabolil, Allan T. Souza, Lukas Vejrik, Zuzana Sajdlova, Tomas Kolarik, Jan Kubecka, Marek Smejkal
Summary: This study investigated the impact of hydropeaking on the spawning ground of rheophilic fish, the asp. It was found that sudden increases in water velocity caused by hydropeaking events can negatively affect the adhesive eggs of the fish, potentially leading to their disappearance. Recommendations were made to avoid hydropeaking or keep water velocity below critical values to manage spawning grounds for rheophilous fish.
Article
Endocrinology & Metabolism
Md. Mahiuddin Zahangir, Md. Shahjahan, Hironori Ando
Summary: Kisspeptin plays an important role in reproductive regulation in animals. In grass puffer, kisspeptin has different effects depending on the reproductive stage, and it mainly acts by regulating the expression of genes in the hypothalamic-pituitary-gonadal axis.
FRONTIERS IN ENDOCRINOLOGY
(2022)
Review
Endocrinology & Metabolism
Paula G. Vissio, Maria P. Di Yorio, Daniela Perez-Sirkin, Gustavo M. Somoza, Kazuyoshi Tsutsui, Julieta E. Sallemi
Summary: This paper summarizes the role and development process of the hypothalamic-pituitary-gonadal axis in regulating reproduction in vertebrates, with a focus on fish as excellent models for studying neuroendocrine systems. Research indicates that this complex network is susceptible to external/internal signals, which may lead to developmental disruptions and impact adult reproduction. Further studies are needed to fully understand the components and dynamics of this network.
FRONTIERS IN NEUROENDOCRINOLOGY
(2021)
Review
Fisheries
Alejandro S. Mechaly, Sergio R. Batlouni, Mariano Elisio, Eduardo A. Sanches, Jonathan Chacon Guzman, Minerva Maldonado Garcia, Adriana Rodriguez-Forero, Paula Vissio, Elvira Fatsini, Jesus Nunez, Neil Duncan
Summary: Aquaculture is a solution to the increasing global demand for fish, and recent reports have shown that aquaculture production in Latin America has grown at rates higher than the world average. The main challenge in diversifying Latin American aquaculture lies in controlling reproduction in certain popular native fish species. This article reviews the use of hormone treatments to enhance reproduction in females of these species, highlighting the historical contribution of Latin America to hormone administration in fish culture and suggesting future research directions to improve reproductive control.
REVIEWS IN AQUACULTURE
(2023)
Article
Agriculture, Dairy & Animal Science
Louise Nex Spica, Eduardo Antonio Sanches, Danilo Pedro Streit Junior, Ruy Alberto Caetano Correa Filho, Lucas de Oliveira Brasileiro, Romulo Batista Rodrigues, Rodrigo Yutaka Dichoff Kasai, Jayme Aparecido Povh
Summary: The study aimed to investigate whether the milt quality of male Leiarius marmoratus remains consistent across successive samples collected during the same reproductive period. The results showed that although there was a slight decrease in milt quality among consecutive collections, all samples were found to be sufficient for fertilization of oocytes.
ANIMAL REPRODUCTION SCIENCE
(2021)
Article
Fisheries
Patricia Oliveira Maciel, Elizabeth Gusmao Affonso
Summary: The study investigated the effects of Praziquantel on the hematological parameters of tambaqui and its efficacy against monogeneans, finding lower concentrations of PZQ to be more effective against specific parasites. The use of ethanol as a solvent did not significantly impact the physiology of tambaqui.
AQUACULTURE INTERNATIONAL
(2021)
Article
Fisheries
Ednara Ronise L. de Araujo, Marcelo F. Torres, Moises Hamoy, Luis Andre L. Barbas, Luis Andre Sampaio
Summary: This study evaluated the cardiotoxic effects of geraniol and citronellol in Colossoma macropomum. The results showed that both substances caused changes in the fish's ECG parameters, but geraniol had a faster recovery time compared to citronellol.
Article
Biology
Callie H. Crawford, Amani Webber-Schultz, Pamela B. Hart, Zachary S. Randall, Cristian Cerrato-Morales, Audrey B. Kellogg, Haley E. Amplo, Apinun Suvarnaraksha, Lawrence M. Page, Prosanta Chakrabarty, Brooke E. Flammang
Summary: Balitorid loaches are fish species adapted to living in fast flowing water and exhibiting unique terrestrial locomotion. This study analyzes the walking kinematics of seven balitorid species and finds differences in locomotion between subfamilies, with little correlation to sacral rib morphology.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Satoshi Imamura, Sung-Pyo Hur, Yuki Takeuchi, Muhammad Badruzzaman, Angka Mahardini, Dinda Rizky, Akihiro Takemura
Summary: Photoperiod plays a role in controlling fish reproduction, and melatonin acts as an internal transducer of environmental photoperiod. The present study investigates the impact of melatonin on the transcript levels of several genes in the brain of the sapphire devil fish. It was found that melatonin treatment can inhibit the increase of certain gene transcripts, and the expression of these genes fluctuates with the day/night cycle.
FISH PHYSIOLOGY AND BIOCHEMISTRY
(2022)
Article
Fisheries
Ana Carla Carvalho Silva, Ruy Alberto Caetano Correa Filho, Darci Carlos Fornari, Janessa Sampaio de Abreu, Annaiza Braga Bignardi, Mariane de Freitas Genari Severino, Luiz Felipe dos Santos Amorim, Laziele Villela Albuquerque, Igor Lacerda Carneiro, Jayme Aparecido Povh
Summary: This study evaluates the performance, morphometric traits, and body yield of three genetic groups of freshwater fish: tambaqui, tambatinga, and tambacu. The results showed differences in performance and morphometric traits among the genetic groups in different production phases, with tambaqui demonstrating the highest performance.
Article
Fisheries
Thiago Macedo Santana, Francisco de Matos Dantas, Driely Kathriny Monteiro Dos Santos, Juliana Tomomi Kojima, Yugo Moraes Pastrana, Rogerio Souza De Jesus, Ligia Uribe Goncalves
Summary: Fish viscera can be processed into acid and fermented silage as an important protein and energy source for aquafeed. This study evaluated the nutritional value and digestibility of these silages for juvenile tambaqui. The silages had high dry matter, lipid, and protein content, with leucine and lysine as the predominant essential amino acids. The silages also contained EPA and DHA, and showed good apparent digestibility for both protein and energy. Overall, fish viscera silage can be a valuable energy ingredient for aquafeed.
Article
Endocrinology & Metabolism
Bin Wang, Kaijie Wang, Zhenfang Tian, Aijun Cui, Xin Liu, Zhixin Jin, Xuezhou Liu, Yan Jiang, Yongjiang Xu
Summary: This study evaluated the effects of endogenous SPX2 peptide on the expression levels of key reproductive genes in the brain-pituitary axis of half-smooth tongue sole. The results showed that SPX2 has inhibitory effects and can induce an increase in pituitary fsh beta expression.
FRONTIERS IN ENDOCRINOLOGY
(2022)
Review
Fisheries
Paula Graziela Lassen, Maria Eugenia Andrighetto Canozzi, Bruna Bitencourt da Costa, Julio Otavio Jardim Barcellos, Danilo Pedro Streit
Summary: The study examined the effects of cryopreservation on sperm motility in South American freshwater fish species. Results showed that the use of cryoprotectants such as alcohols and amides can improve the motility rates of cryopreserved semen.
REVIEWS IN FISHERIES SCIENCE & AQUACULTURE
(2022)
Article
Fisheries
Everton Luis Zardo, Darci Carlos Fornari, Daniel Antonio Rotili, Romulo Batista Rodrigues, Itamar Cossina Gomes, Julia Giora, Juan R. Esquivel-Muelbert, Leonardo J. G. Barcellos, Danilo Pedro Streit
Summary: This study characterized the spermatogenesis and reproductive cycle of male Brycon orbignyanus maintained in a commercial fish hatchery, showing that the species has a rapid regenerating reproductive cycle. Through biometric and histological analysis, five reproductive phases of B. orbignyanus were identified and described under captive conditions.
AQUACULTURE RESEARCH
(2022)
Article
Fisheries
Imaculada de Morais Carvalho Ananias, Caroline Lopes de Melo, Deliane Cristina Costa, Andre Lima Ferreira, Edenilce de Fatima Ferreira Martins, Rodrigo Takata, Ronald Kennedy Luz
Summary: This study found that menthol can be used as an anesthetic for juvenile Lophiosilurus alexandri, with concentrations between 50 and 300 mg L-1 producing ideal induction and recovery times, reducing ventilatory frequency, and preventing an increase in plasma glucose levels.
Article
Fisheries
Daniel Antonio Rotili, Darci Carlos Fornari, Everton Luis Zardo, Juan R. Esquivel-Muelbert, Marcelo Bernardi, Diogenes Henrique Siqueira-Silva, Danilo Pedro Streit
Summary: The levels of reproductive hormones for fish can vary with age and sex, with higher levels of E2 in immature male fish and higher levels of T in fish at 24 and 48 months. In females, E2 levels were higher across different age groups, while T and 11-KT were observed in 48 month females.
Article
Fisheries
Maritza Perez-Atehortua, Andrea Giannotti Galuppo, Romulo Batista Rodrigues, Thales de Souza Franca, Nathalia dos Santos Teixeira, Thaiza Rodrigues de Freitas, Lis Snantos Marques, Itamar Cossina Gomes, Jhony Lisboa Benato, Thales Flores, Eduardo Antonio Sanches, Ana Regina Seabra de Souza, Ivan Bustamante, Monike Quirino, Fernando Pandolfo Bortolozzo, Danilo Pedro Streit Jr
Summary: The use of centrifugation techniques, including differential and density gradient separation, showed positive effects on sperm functionality and fertilization capacity in thawed milt.
Article
Agriculture, Dairy & Animal Science
Thales de Souza Franca, Itamar Cossina Gomes, Eduardo Antonio Sanches, Maritza Perez Atehortua, Nathalia Santos Teixeira, Romulo Batista Rodrigues, Thaiza Rodrigues de Freitas, Andrea Giannotti Galuppo, Monike Quirino, Jhony Lisboa Benato, Thales Lysakowski Flores Machado, Lis Santos Marques, Ivan Cunha Bustamante-Filho, Fernando Pandolfo Bortolozzo, Danilo Pedro Streit Jr
Summary: The study evaluated the effect of post-thaw dilution of Rhamdia quelen sperm on its quality and reproductive capacity. It found that post-thaw dilution improved sperm velocity, straightness, progression, and beat cross frequency. However, there were no differences in membrane integrity, mitochondrial activity, and normal larvae rate. Fertilization and hatching rates were higher in the post-thaw diluted samples compared to the control samples. Therefore, this dilution method can be included in the sperm cryopreservation protocol for R. quelen.
ANIMAL REPRODUCTION SCIENCE
(2022)
Article
Marine & Freshwater Biology
Nayara Oliveira da Cruz, Andrea Giannotti Galuppo, Allison Goncalves Silva, Luciano da Silva Lima, Danilo Pedro Streit Jr, Vivian Fischer, Leandro Godoy
Summary: Given the threat of extinction to coral reefs, reproductive biotechnologies can help fight against extinction. This study aimed to develop a reliable method to assess oocyte viability for scleractinian corals. The trypan blue (TB) test was found to be unfeasible for assessing oocyte viability due to the high lipid content, while the thiazolyl blue tetrazolium bromide (MTT) assay provided a new technique for assessing coral oocyte viability and mitochondrial activity, which can contribute to reef monitoring and conservation strategies.
Article
Biology
A. S. Varela Junior, R. D. Jardim, D. P. Streit Jr, T. F. Cardoso, E. F. Silva, T. Lucia Jr, M. R. C. Figuelredo, C. D. Corcini
Summary: This study tested the inclusion of non-penetrating trehalose in extenders for the cryopreservation of Tambaqui sperm and found that 100 to 150 mM trehalose can replace 10% DMSO to improve sperm quality.
Article
Fisheries
Helena Robattini Carvalho, Diogenes Henrique De Siqueira-Silva, Romulo Batista Rodrigues, Louise Nex Spica, Daniel Antonio Rotili, Everton Luis Zardo, Andrea Giannotti Galuppo, Renata Villar, Juan Ramon Esquivel-Muelbert, Jayme Aparecido Povh, Leonardo Barcellos, Danilo Pedro Streit Jr
Summary: The effect of temperature on gonadal development and sex ratio in Brycon orbignyanus was assessed in this study. Fish were kept at three different temperatures (20°C, 23°C, and 26°C) from the beginning of exogenous feeding. Results showed that the sexual pattern was temperature-dependent, with undifferentiated individuals at 20°C and a higher proportion of immature males at 23°C and males in maturation process and regression phase at 26°C. Testosterone levels were quantified in all treatments, while detectable estradiol levels were found only at 23°C. Continuous exposure to 23°C and 26°C favored testicular development, with faster gonadal development observed at 26°C.
Article
Marine & Freshwater Biology
Wanderson Valente, Andrea Giannotti Galuppo, Danilo Pedro Streit Jr, Jener Alexandre Sampaio Zuanon, Leandro Godoy
Summary: In this study, the composition and arrangement of gametes within bundles in the coral Mussismilia harttii were investigated using histological and ultrastructural analyses. The distribution of gametes in the bundle was found to be random, with regions of higher concentration. After dissociation, oocytes undergo significant morphological changes, while spermatozoa are located within hexagonal-shaped structures. These findings contribute to a better understanding of hermaphrodite broadcasting coral fertilization and support future studies on coral conservation reproductive biotechnologies.
Review
Agronomy
Ursula da Silva Morales, Marco Aurelio Rotta, Darci Carlos Fornari, Danilo Pedro Streit Jr
Summary: Aquaculture is a protein production activity with significant potential for global development. Efficient use of water resources, as well as the application of emergy analysis, are crucial for sustainable aquaculture. Water deserves more attention in emergy accounting to maintain the aquatic activity over the years.
Review
Cell Biology
Iuri Moraes Neyrao, Francisco Bruno Pereira Santos, Romulo Batista Rodrigues, Danilo Pedro Streit, Leandro Godoy
Summary: This systematic review provides an overview of the history and current status of cryopreservation of fish sperm and evaluates cryoprotocols using powdered milk. The research selected 29 articles from databases and found that Rhamdia quelen and Danio rerio were the most studied species. The study found that methanol combined with powdered milk at 10% concentration yielded the best results in preserving fish sperm.
BIOPRESERVATION AND BIOBANKING
(2023)
Article
Developmental Biology
Thales de Souza Franca, Itamar Cossina Gomes, Eduardo Antonio Sanches, Maritza Perez Atehortua, Nathalia dos Santos Teixeira, Romulo Batista Rodrigues, Thaiza Rodrigues de Freitas, Jhony Lisboa Benato, Lis Santos Marques, Ana Regina Seabra de Souza, Danilo Pedro Streit Jr
Summary: This study evaluated the efficiency of hard-gelatin and hard-HPMC capsules as biodegradable, low-cost alternatives for sperm cryopreservation. The post-thaw sperm quality in different containers was assessed, and it was found that although the membrane integrity of sperm cryopreserved in capsules was lower than in plastic straws, there were no significant differences in other sperm parameters. Therefore, both types of capsules were effective for maintaining sperm functionality.
Article
Reproductive Biology
Thaiza Rodrigues de Freitas, Andrea Giannotti Galuppo, Lis Santos Marques, Romulo Batista Rodrigues, Maritza Perez Atehortua, Thales Souza Franca, Nathalia dos Santos Teixeira, Wanderson Valente dos Santos, Itamar Cossina Gomes, Adrieli Sachett, Hadda Tercya, Diogenes Henrique de Siqueira Silva, Douglas Gamba, Tiantian Zhang, Danilo Pedro Streit Jr
Summary: The efficiency of sodium alginate hydrogel encapsulation technique during zebrafish ovarian tissue vitrification was evaluated. The results showed that the technique maintained the membrane integrity but did not have a cryoprotective effect. Halving the cryoprotectant concentration during encapsulation did not increase lipid peroxidation, and it provided support for oocytes after in vitro maturation.
Article
Fisheries
Marco Aurelio Rotta, Romulo Batista Rodrigues, Merlison Figueiredo Pedroso, Luiz Carlos Acorci Filho, Jorge Antonio Ferreira de Lara, Danilo Pedro Streit Jr
Summary: This study investigated the synchronization of gonadal development of banded knifefish in captivity through different time intervals and water electrical conductivity, and also evaluated the use of ultrasound imaging for sex determination and ovarian recrudescence assessment. Results showed that keeping the fish in high water conductivity for a certain period followed by low conductivity achieved significant gonadal maturation. The use of ultrasound imaging was crucial in effectively evaluating the maturation protocol.