Presence of Gamma-Aminobutyric Acid (Gaba) in the Pedal Mucus of the Critically Endangered Species Patella ferruginea

The recruitment of the endangered limpet Patella ferruginea in the Chafarinas Islands (SW Mediterranean) was studied over a 17-year period (1999‒2015). A total of 8115 recruits <20 mm in maximum diameter were counted in 95 transect censuses sampled during the study period. The presence of recruits began at the end of winter or beginning of spring (March‒April), when they reached a maximum shell diameter (MD) of at least 4 mm, with a peak in abundance occurring in spring. Smaller recruits were found on the lower infralittoral on the fringe of the vermetid gastropod Dendropoma lebeche and the crustose coralline algae Neogoniolithon brassica-florida, which suggests that settlement occurs at this shore level. Recruits reach 12‒27 mm at the end of their first year of life. A regular recruitment was detected for all studied years, with an average of 11.71 recruits m−1 across the study period. However, recruitment exhibited high interannual variability and did not occur evenly along the coastline of the islands. Higher recruitment was observed in 2001, 2011 and 2012, with a maximum density of 69.07 recruits m−1 in one transect in 2012. The density of recruits decreased in summer. No significant correlation was found between the density of recruits and adults. Between 1999‒2010, 29.29% of recruits were ‘phoretic’ on the shell of adults (1.81 recruits per host on average). Recruits climbed on to adults sometime after settlement, thus we suggest that ‘phoresy’ could favour the survival of young limpets instead of being due to selective settlement on adults. To improve and standardize recruitment monitoring in future studies, we propose that recruits are considered as those specimens <20 mm in MD and that recruitment censuses are carried out in spring, with additional censuses after summer to detect juvenile mortality. Additionally, we propose that 1 mm interval size classes are used for growth studies based on size‒frequency analyses.

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“…Rivera-Ingraham et al . (2015 b ) verified that GABA was present in the mucus secreted by the foot of adults of P. ferruginea .…”

Section: Discussionmentioning

confidence: 84%

Recruitment of the endangered limpet Patella ferruginea in the Chafarinas Islands (SW Mediterranean)

2022

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“…Annual death rate from the stroke is one of the highest in the world. It should be noted an important physiological role of gamma aminobutyric acid (GABA) in the regulation of the functional activity of central nervous system for these kinds of diseases [18,19].…”

Section: Introductionmentioning

confidence: 99%

Microcapsules made of sodium alginate for the prolonged release of phenibut

Polkovnikova¹,

Koryanova²

2019

Sanat

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A prolonged system of the pharmaceutical substance delivery with nootropic effect was developed; it was phenibut in the form of microcapsules. The polymers used were sodium alginate as polyanion and Calcium chloride as polycation. It was realized by spraying a solution of sodium alginate in a solution of Calcium chloride, which induces the gelation. The features of the surface for the obtained microcapsules with the different ratio of nucleus/substance were determined in the work. Identification of phenibut in microcapsules was performed by IR-spectroscopy. Dependence of the microencapsulation efficiency on the concentration of film-forming material solution and the ratio of nucleus/substance was found. The process of phenibut release from microcapsules in the medium of 0.1 M solution of hydrochloric acid was investigated.

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Biological Conservation of Giant Limpets

Espinosa¹,

Rivera‐Ingraham²

2017

Advances in Marine Biology

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Presence of Gamma-Aminobutyric Acid (Gaba) in the Pedal Mucus of the Critically Endangered Species Patella ferruginea

Cited by 6 publications

References 8 publications

Recruitment of the endangered limpet Patella ferruginea in the Chafarinas Islands (SW Mediterranean)

Recruitment of the endangered limpet Patella ferruginea in the Chafarinas Islands (SW Mediterranean)

Microcapsules made of sodium alginate for the prolonged release of phenibut

Biological Conservation of Giant Limpets

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