scholarly journals Phenotypic differences between the sexes in the sexually plastic mangrove rivulus fish (Kryptolebias marmoratus)

2016 ◽  
Vol 219 (7) ◽  
pp. 988-997 ◽  
Author(s):  
Mark J. Garcia ◽  
Jack M. Ferro ◽  
Tyler Mattox ◽  
Sydney Kopelic ◽  
Kristine Marson ◽  
...  
Keyword(s):  
Phenotypic Differences ◽  
Kryptolebias Marmoratus ◽  
Mangrove Rivulus

scholarly journals Behavioral effects of the neurotoxin ß-N-methylamino-L-alanine on the mangrove rivulus (Kryptolebias marmoratus) larvae

2018 ◽  
Author(s):  
Alessandra Carion ◽  
Julie Hétru ◽  
Angèle Markey ◽  
Victoria Suarez-Ulloa ◽  
Silvestre Frédéric
Keyword(s):  
Genetic Factors ◽  
Prey Capture ◽  
Aquatic Ecotoxicology ◽  
Low Genetic Diversity ◽  
Variable Environments ◽  
Maximal Speed ◽  
Self Fertilization ◽  
Kryptolebias Marmoratus ◽  
Mangrove Rivulus

Mangrove rivulus, Kryptolebias marmoratus, is a hermaphrodite fish capable of self-fertilization. This particularity allows to naturally produce highly homozygous and isogenic individuals. Despite the low genetic diversity, rivulus can live in extremely variable environments and adjust its phenotype accordingly. This species represents a unique opportunity to clearly distinguish the genetic and non-genetic factors implicated in adaptation and evolution, such as epigenetic mechanisms. It is thus a great model in aquatic ecotoxicology to investigate the effects of xenobiotics on the epigenome, and their potential long-term impacts. In the present study, we used the mangrove rivulus to investigate the effects of the neurotoxin ß-N-methylamino-L-alanine (BMAA) on larvae behaviors after 7 days exposure to two sub-lethal concentrations. Results show that BMAA can affect the maximal speed and prey capture (trials and failures), suggesting potential impacts on the organism’s fitness.

Factors affecting egg production in the selfing mangrove rivulus ( Kryptolebias marmoratus )

Zoology ◽  
2017 ◽  
Vol 122 ◽  
pp. 38-45 ◽  
Author(s):  
Justin L. Lomax ◽  
Rachel E. Carlson ◽  
Judson W. Wells ◽  
Patrice M. Crawford ◽  
Ryan L. Earley
Keyword(s):  
Egg Production ◽  
Factors Affecting ◽  
Kryptolebias Marmoratus ◽  
Mangrove Rivulus

scholarly journals DNA methylation in adults and during development of the self-fertilizing mangrove rivulus, Kryptolebias marmoratus

2018 ◽  
Vol 8 (12) ◽  
pp. 6016-6033 ◽  
Author(s):  
Alexandre Fellous ◽  
Tiphaine Labed-Veydert ◽  
Mélodie Locrel ◽  
Anne-Sophie Voisin ◽  
Ryan L. Earley ◽  
...  
Keyword(s):  
Dna Methylation ◽  
The Self ◽  
Kryptolebias Marmoratus ◽  
Mangrove Rivulus

scholarly journals Genetic Subdivision and Variation in Selfing Rates Among Central American Populations of the Mangrove Rivulus, Kryptolebias marmoratus

2015 ◽  
Vol 106 (3) ◽  
pp. 276-284 ◽  
Author(s):  
A. Tatarenkov ◽  
R. L. Earley ◽  
B. M. Perlman ◽  
D. Scott Taylor ◽  
B. J. Turner ◽  
...  
Keyword(s):  
Central American ◽  
Genetic Subdivision ◽  
Kryptolebias Marmoratus ◽  
Mangrove Rivulus

scholarly journals Outbreeding depression as a selective force on mixed mating in the mangrove rivulus fish,Kryptolebias marmoratus

2021 ◽  
Author(s):  
Jennifer D Gresham ◽  
Ryan L Earley
Keyword(s):  
High Salinity ◽  
Outbreeding Depression ◽  
Mixed Mating ◽  
Mangrove Forests ◽  
Selective Force ◽  
Reproduction Strategy ◽  
Self Fertilization ◽  
Kryptolebias Marmoratus ◽  
Mangrove Rivulus ◽  
The Cost

AbstractMixed mating, a reproduction strategy utilized by many plants and invertebrates, optimizes the cost to benefit ratio of a labile mating system. One type of mixed mating includes outcrossing with conspecifics and self-fertilizing one’s own eggs. The mangrove rivulus fish (Kryptolebias marmoratus)is one of two vertebrates known to employ both self-fertilization (selfing) and outcrossing. Variation in rates of outcrossing and selfing within and among populations produces individuals with diverse levels of heterozygosity. I designed an experiment to explore the consequences of variable heterozygosity across four ecologically relevant conditions of salinity and water availability (10‰, 25‰, and 40‰ salinity, and twice daily tide changes). I report a significant increase in mortality in the high salinity (40‰) treatment. I also report significant effects on fecundity measures with increasing heterozygosity. The odds of laying eggs decreased with increasing heterozygosity across all treatments, and the number of eggs laid decreased with increasing heterozygosity in the 10‰ and 25‰ treatments. Increasing heterozygosity also was associated with a reduction liver mass and body condition in all treatments. My results highlight the fitness challenges that accompany living in mangrove forests ecosystem and provide the first evidence for outbreeding depression on reproductive and condition-related traits.

Seeing in the swamp: hydrogen sulfide inhibits eye metabolism and visual acuity in a sulfide-tolerant fish

2021 ◽  
Vol 17 (9) ◽  
pp. 20210329
Author(s):  
Claire A. Allore ◽  
Giulia S. Rossi ◽  
Patricia A. Wright
Keyword(s):  
Visual Acuity ◽  
Hydrogen Sulfide ◽  
Direct Contact ◽  
Foraging Behaviour ◽  
Free Water ◽  
Atp Production ◽  
Fish Vision ◽  
In The Wild ◽  
Kryptolebias Marmoratus ◽  
Mangrove Rivulus

In fish, vision may be impaired when eye tissue is in direct contact with environmental conditions that limit aerobic ATP production. We hypothesized that the visual acuity of fishes exposed to hydrogen sulfide (H 2 S)-rich water would be altered owing to changes in cytochrome c oxidase (COX) activity. Using the H 2 S-tolerant mangrove rivulus ( Kryptolebias marmoratus ), we showed that a 10 min exposure to greater than or equal to 200 µM of H 2 S impaired visual acuity and COX activity in the eye. Visual acuity and COX activity were restored in fish allowed to recover in H 2 S-free water for up to 1 h. Since K. marmoratus are found in mangrove pools with H 2 S concentrations exceeding 1000 µM, visual impairment may impact predator avoidance, navigation and foraging behaviour in the wild.

scholarly journals Real or fake? Natural and artificial social stimuli elicit divergent behavioural and neural responses in mangrove rivulus, Kryptolebias marmoratus

2018 ◽  
Vol 285 (1891) ◽  
pp. 20181610 ◽  
Author(s):  
Cheng-Yu Li ◽  
Hans A. Hofmann ◽  
Melissa L. Harris ◽  
Ryan L. Earley
Keyword(s):  
Basolateral Amygdala ◽  
Activity Patterns ◽  
Mirror Image ◽  
Social Stimuli ◽  
Different Types ◽  
Conspecific Recognition ◽  
Kryptolebias Marmoratus ◽  
Socially Relevant ◽  
Types Of Information ◽  
Mangrove Rivulus

Understanding how the brain processes social information and generates adaptive behavioural responses is a major goal in neuroscience. We examined behaviour and neural activity patterns in socially relevant brain nuclei of hermaphroditic mangrove rivulus fish ( Kryptolebias marmoratus ) provided with different types of social stimuli: stationary model opponent, regular mirror, non-reversing mirror and live opponent. We found that: (i) individuals faced with a regular mirror were less willing to interact with, delivered fewer attacks towards and switched their orientation relative to the opponent more frequently than fish exposed to a non-reversing mirror image or live opponent; (ii) fighting with a regular mirror image caused higher expression of immediate-early genes (IEGs: egr-1 and c-Fos ) in the teleost homologues of the basolateral amygdala and hippocampus, but lower IEG expression in the preoptic area, than fighting with a non-reversing mirror image or live opponent; (iii) stationary models elicited the least behavioural and IEG responses among the four stimuli; and (iv) the non-reversing mirror image and live opponent drove similar behavioural and neurobiological responses. These results suggest that the various stimuli provide different types of information related to conspecific recognition in the context of aggressive contests, which ultimately drive different neurobiological responses.

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