Abstract:
:Parrotfish are fundamental species in controlling algal phase-shifts and ensuring the resilience of coral reefs. Nevertheless, little is known on their ecological role in the south-western Atlantic Ocean. The present study analysed the ontogenetic foraging activity and feeding selectivity of the Brazilian endemic parrotfish Scarus zelindae using behavioural observation and benthic composition analyses. We found a significant negative relationship between fish size and feeding rates for S. zelindae individuals. Thus, terminal phase individuals forage with lower feeding rates compared to juveniles and initial phase individuals. The highest relative foraging frequency of S. zelindae was on epilithic algae matrix (EAM) with similar values for juveniles (86.6%), initial phase (88.1%) and terminal phase (88.6%) individuals. The second preferred benthos for juveniles was sponge (11.6%) compared with initial (4.5%) and terminal life phases (1.3%). Different life phases of S. zelindae foraged on different benthos according to their availability. Based on Ivlev's electivity index, juveniles selected EAM and sponge, while initial phase and terminal phase individuals only selected EAM. Our findings demonstrate that the foraging frequency of the endemic parrotfish S. zelindae is reduced according to body size and that there is a slight ontogenetic change in feeding selectivity. Therefore, ecological knowledge of ontogenetic variations on resource use is critical for the remaining parrotfish populations which have been dramatically reduced in the Southwestern Atlantic Ocean.
journal_name
PeerJjournal_title
PeerJauthors
Pereira PH,Santos M,Lippi DL,Silva Pdoi
10.7717/peerj.2536subject
Has Abstractpub_date
2016-10-12 00:00:00pages
e2536issn
2167-8359pii
2536journal_volume
4pub_type
杂志文章相关文献
PeerJ文献大全abstract::Ovine footrot is a degenerative disease of sheep feet leading to the separation of hoof-horn from the underlying skin and lameness. This study quantitatively examined histological features of the ovine interdigital skin as well as their relationship with pro-inflammatory cytokine (IL-1β) and virulent Dichelobacter nod...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.5097
更新日期:2018-07-02 00:00:00
abstract::Solanum lycopersicum, belonging to Solanaceae, is one of the commonly used model plants. The GRAS genes are transcriptional regulators, which play a significant role in plant growth and development, and the functions of several GRAS genes have been recognized, such as, axillary shoot meristem formation, radial root pa...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.3955
更新日期:2017-11-08 00:00:00
abstract::Antibiotic resistance in our pathogens is medicine's climate change: caused by human activity, and resulting in more extreme outcomes. Resistance emerges in microbial populations when antibiotics act on phenotypic variance within the population. This can arise from either genotypic diversity (resulting from a mutation...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.5801
更新日期:2018-10-12 00:00:00
abstract::Following dramatic range and population declines, the cheetah is Africa's most endangered large felid. In Namibia, private land managers still trap cheetahs but increasingly consider moving animals instead of killing them. Across Africa, managers have translocated perceived conflict carnivores for decades, but rarely ...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.1346
更新日期:2015-10-22 00:00:00
abstract::Background. The impact of head and neck cancer (HNC) in long-term survivors differs widely among individuals, and a significant number of them suffer from the negative effects of disease, whereas others report significant positive effect. This systematic review investigated the evidence the implications of treatment f...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.256
更新日期:2014-02-11 00:00:00
abstract::Phlorotannins are primary and/or secondary metabolites found exclusively in brown seaweeds, but their geographic distribution and abundance dynamic are not very well understood. In this study we evaluated the phlorotannin concentrations among and within-species of brown seaweeds in a broad latitudinal context (range o...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.7379
更新日期:2019-08-14 00:00:00
abstract:Purpose:Pterygium results from a variety of biological pathways that are involved in the formation of ocular surface diseases. However, the exact pathogenesis of pterygium is still unclear. Our study focused on gene expression profiles to better understand the potential mechanisms of pterygium. Methods:RNA sequencing ...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.9056
更新日期:2020-05-04 00:00:00
abstract::The mutant form GGBP/H152C of the D-glucose/D-galactose-binding protein with the solvatochromic dye BADAN linked to cysteine residue Cys 152 can be used as a potential base for a sensitive element of glucose biosensor system. We investigated the influence of various external factors on the physical-chemical properties...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.275
更新日期:2014-03-18 00:00:00
abstract::Harmine is the β-carboline alkaloid with the highest concentration in the psychotropic plant decoction Ayahuasca. In rodents, classical antidepressants reverse the symptoms of depression by stimulating neuronal proliferation. It has been shown that Ayahuasca presents antidepressant effects in patients with depressive ...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.2727
更新日期:2016-12-06 00:00:00
abstract::The capacity for aerial maneuvering was likely a major influence on the evolution of flying animals. Here we evaluate consequences of paravian morphology for aerial performance by quantifying static stability and control effectiveness of physical models for numerous taxa sampled from within the lineage leading to bird...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.632
更新日期:2014-10-16 00:00:00
abstract::Tyrosine phosphorylation has emerged as an important regulator of plasma membrane-localized immune receptors activity. Here, we investigate the role of tyrosine phosphorylation in the regulation of rice XANTHOMONAS RESISTANCE 21 (XA21)-mediated immunity. We demonstrate that the juxtamembrane and kinase domain of Esche...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.6074
更新日期:2018-12-11 00:00:00
abstract::This study evaluated pollution levels in water and sediments of Península de Paraguaná and related these levels with benthic macrofauna along a coastal area where the largest Venezuelan oil refineries have operated over the past 60 years. For this, the concentration of heavy metals, of hydrocarbon compounds and the co...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.2171
更新日期:2016-06-23 00:00:00
abstract::The ε subunit from ATP synthases acts as an ATP sensor in the bacterial cell to prevent ATP hydrolysis and thus the waste of ATP under conditions of low ATP concentration. However, the ATP binding affinities from various bacterial organisms differ markedly, over several orders of magnitude. For example, the ATP syntha...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.5505
更新日期:2018-09-05 00:00:00
abstract::Combination Index (CI) analysis suggested that MBIC and doxorubicin synergistically inhibited up to 97% of cell proliferation in ER+/PR+MCF-7 and triple negative MDA-MB-231 breast cancer cell lines. Moreover, treatment of the breast cancer cells with the combined drugs resulted in lower IC50 values in contrast to the ...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.5577
更新日期:2018-09-17 00:00:00
abstract::The partitioning of production forests into discretely managed forest stands confronts animals with diversity in forest attributes at scales from point-level tree assemblages to distinct forest patches and range-level forest cover. We have investigated the movement and ranging patterns of male Common Chaffinches, Frin...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.368
更新日期:2014-06-19 00:00:00
abstract::The maximum likelihood estimation (MLE) method, typically used for polytomous logistic regression, is prone to bias due to both misclassification in outcome and contamination in the design matrix. Hence, robust estimators are needed. In this study, we propose such a method for nominal response data with continuous cov...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.467
更新日期:2014-07-01 00:00:00
abstract::Grazing and litter removal can alter understory structure and composition after afforestation, posing a serious threat to sustainable forest development. Enclosure is considered to be an effective measure to restore degraded forest restoration. However, little is known about the dynamics of soil nutrients and microbia...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.8857
更新日期:2020-03-25 00:00:00
abstract::In this paper, we map the distribution of scale-rayed wrasse Acantholabrus palloni in eastern Skagerrak based on a combination of verified and personally communicated angling records. Long thought to be occasional vagrants outside its known range in the eastern Atlantic Ocean and Mediterranean Sea, we ask if this rare...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.5900
更新日期:2018-11-06 00:00:00
abstract::Motile cryptofauna inhabiting coral reefs are complex assemblages that utilize the space available among dead coral stands and the surrounding coral rubble substrate. They comprise a group of organisms largely overlooked in biodiversity estimates because they are hard to collect and identify, and their collection caus...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.10389
更新日期:2020-11-23 00:00:00
abstract::Due to its remote and isolated location, Antarctica is home to a unique diversity of species. The harsh conditions have shaped a primarily highly adapted endemic fauna. This includes the notothenioid family Channichthyidae. Their exceptional physiological adaptations have made this family of icefish the focus of many ...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.4638
更新日期:2018-05-11 00:00:00
abstract::Exclosures that exclude large herbivores are effective tools for the protection and restoration of grazed plant communities. However, previous studies have shown that the installation of an exclosure does not ensure plant community recovery. Our study aimed to determine the effects of the domination of unpalatable pla...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.7833
更新日期:2019-10-01 00:00:00
abstract::In this study, we demonstrated the successful transformation of two pea (Pisum sativum L.) cultivars using Agrobacterium rhizogenes, whereby transgenic roots in the resulting composite plants showed expression of the gene encoding the green fluorescent protein. Subsequent to infection with A. rhizogenes, approximately...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.6552
更新日期:2019-03-06 00:00:00
abstract:BACKGROUND:Motion sickness may be caused by a sensory conflict between the visual and the vestibular systems. Scopolamine, known to be the most effective therapy to control the vegetative symptoms of motion sickness, acts on the vestibular nucleus and potentially the vestibulospinal pathway, which may affect balance an...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.2008
更新日期:2016-05-05 00:00:00
abstract:BACKGROUND AND AIMS:Cryptic peracarids are an important component of the coral reef fauna in terms of diversity and abundance, yet they have been poorly studied. The aim of this study was to evaluate the taxonomic richness and abundance of cryptic peracarids in coral rubble in the Puerto Morelos Reef National Park, Mex...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.3411
更新日期:2017-06-15 00:00:00
abstract:BACKGROUND:Individuals with unilateral lower limb amputation have a high risk of developing knee osteoarthritis (OA) in their intact limb as they age. This risk may be related to joint loading experienced earlier in life. We hypothesized that loading during walking would be greater in the intact limb of young US milita...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.2960
更新日期:2017-02-02 00:00:00
abstract:BACKGROUND:Antimicrobial peptides (AMPs) are of great potential as novel antibiotics for the treatment of broad spectrum of pathogenic microorganisms including resistant bacteria. In this study, the mechanisms of action and the therapeutic efficacy of the hybrid peptides were examined. METHODS:TEM, SEM and ATP efflux ...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.3887
更新日期:2017-10-05 00:00:00
abstract::Lupus nephritis (LN) is a severe manifestation of systemic lupus erythematosus (SLE), which often progresses to end-stage renal disease (ESRD) and ultimately leads to death. At present, there are no definitive therapies towards LN, so that illuminating the molecular mechanism behind the disease has become an urgent ta...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.7722
更新日期:2019-10-01 00:00:00
abstract:Objectives:The purpose of this study is to investigate the patterns of complementary and alternative medicine use and its association with time to conventional treatment. Design:A cross-sectional study design was designed. Setting and participants:The study was performed at the Chonburi Cancer Hospital, with chart re...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.7159
更新日期:2019-06-14 00:00:00
abstract:Background:Sex ratio distorting agents (maternally inherited symbionts and meiotically-driving sex chromosomes) are common in insects. When these agents rise to high frequencies they create strong population sex ratio bias and selection then favours mutations that act to restore the rare sex. Despite this strong select...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.7677
更新日期:2019-10-01 00:00:00
abstract:Background:Cytoplasmic male sterility (CMS) is a common phenotype in higher plants, that is often associated with rearrangements in mitochondrial DNA (mtDNA), and is widely used to produce hybrid seeds in a variety of valuable crop species. Investigation of the CMS phenomenon promotes understanding of fundamental issue...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.5266
更新日期:2018-07-23 00:00:00