scholarly journals Sound production in the Meagre, Argyrosomus regius (Asso, 1801): intraspecific variability associated with size, sex and context

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e8559 ◽  
Author(s):  
Beatriz P. Pereira ◽  
Manuel Vieira ◽  
Pedro Pousão-Ferreira ◽  
Ana Candeias-Mendes ◽  
Marisa Barata ◽  
...  
Keyword(s):  
Sound Production ◽  
Captive Breeding ◽  
Intraspecific Variability ◽  
Dominant Frequency ◽  
Acoustic Features ◽  
Future Studies ◽  
Argyrosomus Regius ◽  
Influence Of Water ◽  
Sound Features ◽  
First Time

Background Many fish taxa produce sound in voluntary and in disturbance contexts but information on the full acoustic repertoire is lacking for most species. Yet, this knowledge is critical to enable monitoring fish populations in nature through acoustic monitoring. Methods In this study we characterized the sounds emitted during disturbance and voluntary contexts by juvenile and adult meagre, Argyrosomus regius, in laboratory conditions. Breeding sounds produced by captive adults were also compared with meagre sounds registered in the Tagus estuary (Lisbon, Portugal) from unseen fish during the breeding season. Results The present dataset demonstrates for the first time that in this species dominant frequency is inversely related to fish size, and that sounds vary according to sex, context and age. Sounds from captive breeding adults were similar to sounds recorded in the field. Discussion Our findings indicate that A. regius sound features carry information about size, sex, age and motivation. This variability could potentially be used to identify meagre in the field and to infer about ontogenetic phase (i.e., juveniles vs. adults, and variation with size) and motivation (e.g., spawning). Future studies should confirm sex differences and ascertain the influence of water temperature on acoustic features.

scholarly journals Diversity of pathogenic Pseudomonas isolated from citrus in Tunisia

AMB Express ◽  
2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Maroua Oueslati ◽  
Magdalena Mulet ◽  
Mohamed Zouaoui ◽  
Charlotte Chandeysson ◽  
Jorge Lalucat ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
Pseudomonas Syringae ◽  
Ice Nucleation ◽  
Phylogenetic Study ◽  
Future Studies ◽  
Citrus Orchards ◽  
First Time ◽  
New Cultivars

Abstract The damages observed in Tunisian citrus orchards have prompted studies on the Pseudomonas spp. responsible for blast and black pit. Prospective orchards between 2015 and 2017 showed that the diseases rapidly spread geographically and to new cultivars. A screening of Pseudomonas spp. isolated from symptomatic trees revealed their wide diversity according to phylogenetic analysis of their housekeeping rpoD and cts genes. The majority of strains were affiliated to Pseudomonas syringae pv. syringae (Phylogroup PG02b), previously described in Tunisia. However, they exhibited various BOX-PCR fingerprints and were not clonal. This work demonstrated, for the first time in Tunisia, the involvement of Pseudomonas cerasi (PG02a) and Pseudomonas congelans (PG02c). The latter did not show significant pathogenicity on citrus, but was pathogenic on cantaloupe and active for ice nucleation that could play a role in the disease. A comparative phylogenetic study of citrus pathogens from Iran, Montenegro and Tunisia revealed that P. syringae (PG02b) strains are closely related but again not clonal. Interestingly P. cerasi (PG02a) was isolated in two countries and seems to outspread. However, its role in the diseases is not fully understood and it should be monitored in future studies. The diversity of pathogenic Pseudomonas spp. and the extension of the diseases highlight that they have become complex and synergistic. It opens questions about which factors favor diseases and how to fight against them efficiently and with sustainable means.

scholarly journals Hearing from the ocean and into the river: the evolution of the inner ear of Platanistoidea (Cetacea: Odontoceti)

Paleobiology ◽  
2021 ◽  
pp. 1-21
Author(s):  
Mariana Viglino ◽  
Maximiliano Gaetán ◽  
Mónica R. Buono ◽  
R. Ewan Fordyce ◽  
Travis Park
Keyword(s):  
Inner Ear ◽  
High Frequency ◽  
Sound Production ◽  
Marine Species ◽  
Late Oligocene ◽  
Evolutionary Patterns ◽  
Ear Morphology ◽  
Cochlear Morphology ◽  
First Time ◽  
Hearing Abilities

Abstract The inner ear of the two higher clades of modern cetaceans (Neoceti) is highly adapted for hearing infrasonic (mysticetes) or ultrasonic (odontocetes) frequencies. Within odontocetes, Platanistoidea comprises a single extant riverine representative, Platanista gangetica, and a diversity of mainly extinct marine species from the late Oligocene onward. Recent studies drawing on features including the disparate tympanoperiotic have not yet provided a consensus phylogenetic hypothesis for platanistoids. Further, cochlear morphology and evolutionary patterns have never been reported. Here, we describe for the first time the inner ear morphology of late Oligocene–early Miocene extinct marine platanistoids and their evolutionary patterns. We initially hypothesized that extinct marine platanistoids lacked a specialized inner ear like P. gangetica and thus, their morphology and inferred hearing abilities were more similar to those of pelagic odontocetes. Our results reveal there is no “typical” platanistoid cochlear type, as the group displays a disparate range of cochlear anatomies, but all are consistent with high-frequency hearing. Stem odontocete Prosqualodon australis and platanistoid Otekaikea huata present a tympanal recess in their cochlea, of yet uncertain function in the hearing mechanism in cetaceans. The more basal morphology of Aondelphis talen indicates it had lower high-frequency hearing than other platanistoids. Finally, Platanista has the most derived cochlear morphology, adding to evidence that it is an outlier within the group and consistent with a >9-Myr-long separation from its sister genus Zarhachis. The evolution of a singular sound production morphology within Platanistidae may have facilitated the survival of Platanista to the present day.

Third time’s a charm: reviewing the advertisement call of Gabohyla pauloalvini (Anura: Hylidae: Scinaxinae), an endemic species from Brazil’ Atlantic Forest

Zootaxa ◽  
2021 ◽  
Vol 5032 (3) ◽  
pp. 431-441
Author(s):  
LUIZ FERNANDO CARMO ◽  
JULIANA ALVES ◽  
IURI R. DIAS ◽  
MIRCO SOLÉ ◽  
CAIO V. DE MIRA-MENDES ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
Dominant Frequency ◽  
Advertisement Call ◽  
Audio Recordings ◽  
Natural History Studies ◽  
Disjunct Populations ◽  
Audio Files ◽  
Scientific Collections ◽  
First Time ◽  
New Distribution

The Neotropical tribe Sphaenorhynchini is composed of 15 recognized species commonly named as “lime treefrogs”. Gabohyla pauloalvini occurs in Atlantic Forest lowlands through the states of Bahia and Espírito Santo, Brazil. Based on field observation, literature review, and evaluation of audio files, we conclude that previous bioacoustic descriptions were erroneously assigned to G. pauloalvini. Here, we describe for the first time the advertisement call of G. pauloalvini from two disjunct populations. In addition, we provide new distribution records and an updated map for this species. The advertisement call of G. pauloalvini is composed of 1–5 closely spaced notes, with duration of 0.016–1.976 s, inter-note intervals of 0.340–1.25 s, and an average dominant frequency (= fundamental frequency) of 4966.0 Hz. Harmonics are visible in the spectrogram. Three new populations of G. pauloalvini have been recorded and extended the distribution by 60 km south. Nevertheless, G. pauloalvini is still known only from few localities. We highlight the importance of depositing audio recordings and specimens in scientific collections to promote systematics and natural history studies.  

scholarly journals Metagenomic Comparisons between Soft and Hard Feces of Plateau Pikas (Ochotona curzoniae)

Animals ◽  
2022 ◽  
Vol 12 (2) ◽  
pp. 149
Author(s):  
Haibo Fu ◽  
Wenjing Li
Keyword(s):  
Amino Acids ◽  
Fatty Acids ◽  
16S Rdna ◽  
Microbial Metabolism ◽  
Short Chain Fatty Acids ◽  
Short Chain ◽  
Future Studies ◽  
Ochotona Curzoniae ◽  
The Future ◽  
First Time

The division of hard and soft feces is an effective digestion strategy in the order Lagomorpha. Although previous studies have reported that hard and soft feces differ in morphology and component, the discrepancy in the microbiome remains unclear. This study explored the microbiomes of hard and soft feces in plateau pikas by sequencing the V3 and V4 regions of 16S rDNA. We found that hard feces harbored higher Firmicutes, while soft feces harbored higher Akkermansia. Increased rare bacterial taxa were observed in hard feces compared with soft feces. Moreover, hard and soft feces displayed a greater difference in terms of core operational taxonomy units (OTUs) compared to the total OTUs. The soft feces showed enhancements in all predicted Kyoto Encyclopedia of Genes and Genomes (KEGG) functions, indicating an advancing microbial metabolism compared to hard feces. The significantly upregulated pathways in soft feces were mainly enriched in metabolism of energy and carbohydrate, glycan biosynthesis, cofactors and vitamins, and amino acids—all of which are associated with increased contents of microbial proteins, vitamins, and short-chain fatty acids. Our study reports, for the first time, the differential microbiomes between hard and soft feces of pikas and provides direction for the future studies on cecotrophy.

scholarly journals Characteristics of sound production and associated pharyngeal jaws in the tomtate grunt Haemulon aurolineatum (Cuvier, 1830) in Caribbean reefs

2021 ◽  
Vol 151 ◽  
Author(s):  
Morgane Millot ◽  
Frédéric Bertucci ◽  
David Lecchini ◽  
Sarah Smeets ◽  
Malika René-Trouillefou ◽  
...  
Keyword(s):  
Acoustic Communication ◽  
Standard Length ◽  
Sound Production ◽  
Additional Data ◽  
Unusual Feature ◽  
Acoustic Features ◽  
Additional Information ◽  
The Family ◽  
Pharyngeal Jaws

The ability to produce sounds for acoustic communication is well known in different grunt species (Haemulidae). However, most of the sounds have not been described and the sound-producing mechanism of very few grunt species has been deeply studied. Additional data is needed to search for synapomorphy in the sonic mechanism. This study describes acoustic features and branchial anatomy in Haemulon aurolineatum. Correlations were found between some acoustic features and standard length, showing the largest specimens produced shorter, lower-pitched grunts of higher intensity. Examinations of acoustic features and branchial anatomy show that H. aurolineatum uses the same stridulatory mechanism described previously in H. flavolineatum. The unusual feature of Haemulon species concerns the fourth ceratobranchials. These appear to be part of the lower pharyngeal jaws since they possess firmly attached teeth that face the upper pharyngeal jaws. The stridulation results from the rubbing of both pharyngeal and fourth ceratobranchial teeth. This mechanism is probably common to the 23 Haemulon species, but additional information is needed regarding the mechanism of other Haemulinae species to produce stridulatory sounds. Fourth ceratobranchials could constitute a key element of Haemulinae ability to produce sounds providing an eventual synapomorphic aspect of the mechanism in the family.

Irrational happiness beliefs and subjective well-being of undergraduate students: A longitudinal study

2021 ◽  
Vol 5 (1) ◽  
pp. 65-72
Author(s):  
Murat Yıldırım
Keyword(s):  
Negative Affect ◽  
Positive Affect ◽  
Undergraduate Students ◽  
Well Being ◽  
Subjective Well Being ◽  
Future Studies ◽  
Affective Components ◽  
The Impact ◽  
First Time ◽  
Over Time

Identifying factors that influence well-being are fruitful for improving the knowledge held about the correlates and predictors of well-being in both practice and theory. This research for the first time aimed to investigate whether irrational happiness beliefs, a newly presented construct, contribute to the affective components of subjective well-being over time. The sample included 103 undergraduate students (88 females and 15 males) whose ages varied from 18 to 29 years (M = 19.39 ±1.62). Participants completed measures of irrational happiness beliefs, positive affect, and negative affect both at Time 1 and Time 2 over three months apart. The findings showed that irrational happiness beliefs were significantly negatively related to positive affect only at Time 1. However, the research failed to provide evidence regarding the value of irrational happiness beliefs in predicting positive and negative affect over time. The results suggest that the impact of irrational happiness beliefs upon well-being may occur momentarily not over time. Implications and limitations of the findings are discussed and directions for future studies are provided.

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