The Periodic Feeding Frequency of the Juvenile Tropical Rock Lobster (Panulirus ornatus) in the Examination of Chemo-Attract Diet Performance and Colour-Contrast Preference DOI Creative Commons

C. J. Peters,

Sandra Infante Villamil, Leo Nankervis

et al.

Animals, Journal Year: 2024, Volume and Issue: 14(20), P. 2971 - 2971

Published: Oct. 15, 2024

Significant research investment into tropical rock lobster (TRL) aquaculture production methods has led to a rapidly developing industry in Vietnam and, more recently, Australia. The need for an effective formulated feed been highlighted both industries; however, intake consistent limitation. Visual and chemical cues regulating recognition consumption are expected yield valuable data, leading increased intake. Lobsters were placed white- grey-coloured enclosures examine the effect of background colour on their feeding behaviour terms occurrence response time. impact TRL found no statistically significant differences between white grey enclosures, suggesting grayscale contrast does not directly affect behaviour. Experiment 2 studied effects coloured zones enclosures. Yellow decreased time (473 ± 443 s) spent (168 1832 compared other colours, possibly due yellow-blue chromaticity (b*) contrast. 3 examined chemo-attractants (glycine, taurine inositol) influence TRL, but responses observed. Experiments two three assessed activity morning evening periods, highlighting nocturnal behaviour, with occurring evening. This project enhances our understanding photoreceptive chemoreceptive factors affecting feed. It also reveals potential changes enhance marketable colours commercial settings. Additionally, study confirmed use animal tracking software (EthoVision XT) species future behavioural trials.

Language: Английский

Circadian migrations of cave-dwelling crustaceans guided by their home chemical seascape DOI Creative Commons
Marie Derrien, Mathieu Santonja, Stéphane Greff

et al.

Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 11

Published: Sept. 17, 2024

Organisms release and detect molecules for defense, reproduction, feeding strategies finding suitable habitats. For some migratory species, homing behavior could be related to the recognition of their home chemical fingerprint made an assemblage from habitat. In marine realm, functioning ecosystems such as underwater caves largely depends on trophic interactions between outside environment. A key feature these relies circadian migration small crustaceans (Mysida) cave habitat open sea. Recently, it has been hypothesized that migrations involve mediation. Behavioral experiments using a two-choice system have shown mysids significantly seawater rather than control water Here, we used same experimental investigate by two populations mysid Hemimysis margalefi . Both were submitted choice three distinct seawaters vs. seawater. Additionally, tested preference non-cave species ( Leptomysis sp.) seawaters. To evaluate whether was influenced cues conspecifics, complementary experiment H. conducted. Results demonstrated each studied population recognizes its own habitat, this is not occurrence ’s exudates. Mass spectrometry-based metabolomic analyses revealed had specific with only few reproducibly detected signals belonging different classes: peptides, alkaloids, fatty acids, steroids but also inorganic molecules. Organic pollutants detected. Among compounds, one oxylipin derivative peptide considered markers ecosystem. Therefore, postulate seascape participates which are analogous daily-based behavior.

Language: Английский

Citations

5
Effects of pH on Olfactory Behaviours in Male Shore Crabs, Carcinus maenas DOI Creative Commons
Hannah Ohnstad, A. M. Jones,

Bethany Howard

et al.

Animals, Journal Year: 2024, Volume and Issue: 14(6), P. 948 - 948

Published: March 19, 2024

The effects of climate change are becoming more apparent, predominantly concerning the impacts ocean acidification on calcifying species. Many marine organisms rely chemical signals for processes such as foraging food, predator avoidance, or locating mates. process how cues in invertebrates function, and this sensory mode is affected by pH levels, less researched. We tested impact reduced (7.6), simulating end-of-the-century predicted average pH, against current oceanic conditions (8.2), behavioural response male shore crabs Carcinus maenas to female sex pheromone bouquet consisting Uridine–diphosphate (UDP) Uridine–triphosphate (UTP). While there was a significant increase sexual interactions presence pheromone, males showed behaviours at 7.6. crab weight–pH relationship, which larger individuals respond intensely sexually normal reversed both initial detection time locate cue. These results indicate that lowered alters signalling C. also outside peak reproductive season, may need be taken into account when considering future management globally invasive

Language: Английский

Citations

1
Effect of Population Density on Personality of Crayfish (Procambarus clarkii) DOI Creative Commons
Su Li,

Leiyu Lu,

Mengdi Si

et al.

Animals, Journal Year: 2024, Volume and Issue: 14(10), P. 1486 - 1486

Published: May 17, 2024

Personality is widely observed in animals and has important ecological evolutionary implications. In addition to being heritable, personality traits are also influenced by the environment. Population density commonly affects animal behavior, but way which it shapes remains largely unknown. this study, we reared juvenile crayfish at different population densities measured their (shyness, exploration, aggression) after reaching sexual maturity. Our results showed repeatability for each behavior all treatments, except shyness of females medium density. There was a negative correlation between exploration treatment, aggression were positively correlated medium- high-density females. These indicate presence syndrome. On average, raised higher less shy, more exploratory, aggressive. We found no behavioral differences sexes crayfish. suggested that may affect average values rather than occurrence traits. study highlights importance considering as factor influencing and, therefore, might help us understand development.

Language: Английский

Citations

1
The molecular arsenal of the key coastal bioturbator Hediste diversicolor faced with changing oceans DOI Creative Commons
Kaylee Beine, Lauric Feugere, Nichola Fletcher

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 24, 2024

Abstract The importance of infaunal bioturbators for the functioning marine ecosystems cannot be overstated. Inhabitants estuarine and coastal habitats are expected to show resilience fluctuations in seawater temperature pH, which adds complexity our understanding effects global change drivers. Further, stress responses may propagated through chemical cues within across species, amplify costs life alter species interactions. Research into molecular mechanisms underlying this has been limited by a lack annotated genomes associated tools. In study, we present first chromosome-level, draft genome ragworm Hediste diversicolor , specifically mapping genes important communication, sensing pH homeostasis. Using these resources, then evaluate transcriptomic behavioural two distinct populations — one field-sampled from Portugal (Ria Formosa) laboratory-acclimated -bred United Kingdom (Humber) changes temperature, odour low pH-stressed predator. Both displayed adaptive future oceanic conditions, with targeted acid-base regulation Ria Formosa population experiment, broader metabolism growth Humber experiment. Chemical stressed fish predators induced related Schreckstoff biosynthesis ragworms. Additionally, under ocean conditions including increased exhibited signs cellular damage. Our findings using new offer novel insights arsenal aids predicting impacts an increasingly acidified unstable ocean, transfer knowledge investigate less tolerance.

Language: Английский

Citations

0
The Periodic Feeding Frequency of the Juvenile Tropical Rock Lobster (Panulirus ornatus) in the Examination of Chemo-Attract Diet Performance and Colour-Contrast Preference DOI Creative Commons

C. J. Peters,

Sandra Infante Villamil, Leo Nankervis

et al.

Animals, Journal Year: 2024, Volume and Issue: 14(20), P. 2971 - 2971

Published: Oct. 15, 2024

Significant research investment into tropical rock lobster (TRL) aquaculture production methods has led to a rapidly developing industry in Vietnam and, more recently, Australia. The need for an effective formulated feed been highlighted both industries; however, intake consistent limitation. Visual and chemical cues regulating recognition consumption are expected yield valuable data, leading increased intake. Lobsters were placed white- grey-coloured enclosures examine the effect of background colour on their feeding behaviour terms occurrence response time. impact TRL found no statistically significant differences between white grey enclosures, suggesting grayscale contrast does not directly affect behaviour. Experiment 2 studied effects coloured zones enclosures. Yellow decreased time (473 ± 443 s) spent (168 1832 compared other colours, possibly due yellow-blue chromaticity (b*) contrast. 3 examined chemo-attractants (glycine, taurine inositol) influence TRL, but responses observed. Experiments two three assessed activity morning evening periods, highlighting nocturnal behaviour, with occurring evening. This project enhances our understanding photoreceptive chemoreceptive factors affecting feed. It also reveals potential changes enhance marketable colours commercial settings. Additionally, study confirmed use animal tracking software (EthoVision XT) species future behavioural trials.

Language: Английский

Citations

0