Results 71 to 80 of about 14,761 (221)
LA SPERMATOGENÈSE DE POECILIA RETICULATA. II. — LA PRODUCTION SPERMATOGÉNÉTIQUE [PDF]
Annales de Biologie Animale Biochimie Biophysique, 1969 La production spermatogénétique de Poecilia reticulata est de 36 spermatozeugmes par jour soit environ 750 000 spermatozoïdes. Dans cette espèce, le canal testiculaire apparaît comme un véritable organe de stockage desspermatozoïdes qui n'assure pas une élimination régulière des spermatozeugmes ce qui conduit à une grande hétérogénéité dans l'âge des ...
Billard, Roland, Puissant, Claudine
openaire +2 more sources
Sexual selection and reproductive success in mesocosm populations of African annual killifish
Journal of Fish Biology, EarlyView.Abstract Variation in individuals’ ability to obtain mates generates sexual selection, which typically acts more strongly on males and can produce pronounced differences in phenotypes between the sexes (i.e., sexual dimorphism). The dynamic of sexual selection and individual reproductive success is considerably affected by the availability of ...
Jakub Žák +2 more
wiley +1 more source
'Selfish herds' of guppies follow complex movement rules, but not when information is limited [PDF]
, 2015 Under the threat of predation, animals can decrease their level of risk by moving towards other individuals to form compact groups. A significant body of theoretical work has proposed multiple movement rules, varying in complexity, which might underlie ...
Kimbell, Helen S., Morrell, Lesley J.
core +2 more sources
Sequencing and characterization of the guppy (Poecilia reticulata) transcriptome [PDF]
BMC Genomics, 2011 Next-generation sequencing is providing researchers with a relatively fast and affordable option for developing genomic resources for organisms that are not among the traditional genetic models. Here we present a de novo assembly of the guppy (Poecilia reticulata) transcriptome using 454 sequence reads, and we evaluate potential uses of this ...
Fraser, Bonnie A +4 more
openaire +4 more sources
Control Strategies in Guanine Biocrystallization
Angewandte Chemie, Volume 138, Issue 18, 27 April 2026.Biological guanine crystals produce spectacular photonic phenomena in animals and hold great promise as new, sustainable optical materials. We review how organisms precisely control the structure, morphologies, and resulting optical properties of these crystals using a set of ingenious ‘design’ strategies, including control of pH, template‐directed ...
Shashanka S. Indri +2 more
wiley +2 more sources
Efficacy of Honey on Sex Reversal of Guppy (Poecilia reticulata Peters)
Jurnal Akuakultur Indonesia, 2007 This study was performed to determine effectiveness of honey on sex reversal of guppy. Guppy broodstock was dipped on 1 L of water containing 0, 20, 40 or 60 mL of honey, for 10 hours.
D.T. Soelistyowati, E. Martati, H. Arfah
doaj +1 more source
Veterinární Medicína, 2021 The use of in vitro (fish cell lines) is a cost-effective, very rapid, and informative tool for toxicological assessments. Using the neutral red (NR) assay, we compared the in vitro acute toxicity (20hEC50) of twenty-six chemical substances on a rainbow ...
J Kolarova, J Velisek, Z Svobodova
doaj +1 more source
Short‐term performance responses of an intertidal fish to sedimentation and warming
Journal of Fish Biology, EarlyView.Abstract Climate change is altering coastal ecosystems by causing environmental fluctuations, such as increases in temperature and turbidity, which pose major implications for fish physiology and behaviour. Increases in temperature affect fish food intake, swimming capacity and oxygen delivery, while increases in turbidity can impair or enhance prey ...
Anna Carolina Resende +3 more
wiley +1 more source
Toxicidade do inseticida Organofosforado Abate® em alevinos de Poecilia reticulata. [PDF]
, 2011 Made available in DSpace on 2011-04-09T19:01:36Z (GMT). No. of bitstreams: 1 7FINALIZADOv5n23a01361.pdf: 365343 bytes, checksum: 0b87260ac17945400ce7ade7dc2de29c (MD5) Previous issue date: 2011-01 ...
BORIN, S. +3 more
core +1 more source
Journal of Fish Diseases, EarlyView.ABSTRACT Paracamallanus cyathopharynx (Baylis, 1923) specimens were collected from the rectum of the African sharptooth catfish, Clarias gariepinus in Lake Heritage, Crocodile River in the Limpopo River system and in the Vaal River below the Vaal Dam. Attached and unattached parasites were studied with light and scanning electron microscopy along with ...
Thabo Kenneth Matea +1 more
wiley +1 more source