scholarly journals The northernmost haulout site of South American sea lions and fur seals in the western South Atlantic

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Natália Procksch ◽  
M. Florencia Grandi ◽  
Paulo Henrique Ott ◽  
Karina Groch ◽  
Paulo A. C. Flores ◽  
...  
Keyword(s):  
Mixed Model ◽  
Linear Mixed Model ◽  
Elephant Seal ◽  
Southern Elephant Seal ◽  
South American ◽  
Mirounga Leonina ◽  
Sea Lions ◽  
Significant Difference ◽  
Northern Portion ◽  
Kernel Density Analysis

AbstractWe present estimates of the seasonal and spatial occupation by pinnipeds of the Wildlife Refuge of Ilha dos Lobos (WRIL), based on aerial photographic censuses. Twenty aerial photographic censuses were analysed between July 2010 and November 2018. To assess monthly differences in the numbers of pinnipeds in the WRIL we used a Generalized Linear Mixed Model. Spatial analysis was carried out using Kernel density analysis of the pinnipeds on a grid plotted along the WRIL. Subadult male South American sea lions (Otaria flavescens) were the most abundant pinniped in the WRIL. Potential females of this species were also recorded during half of the census. The maximum number of pinnipeds observed in the WRIL was 304 in September 2018, including an unexpected individual southern elephant seal (Mirounga leonina), and a high number of South American fur seal yearlings (Arctocephalus australis). However, there was no statistically significant difference in counts between months. In all months analysed, pinnipeds were most often found concentrated in the northern portion of the island, with the highest abundances reported in September. This study confirms the importance of the WRIL as a haulout site for pinnipeds in Brazil, recommends that land research and recreational activities occur in months when no pinnipeds are present, and encourages a regulated marine mammal-based tourism during winter and spring months.

scholarly journals Sex-specific foraging strategies and resource partitioning in the southern elephant seal ( Mirounga leonina )

2006 ◽  
Vol 273 (1603) ◽  
pp. 2901-2907 ◽  
Author(s):  
Rebecca Lewis ◽  
Tamsin C O'Connell ◽  
Mirtha Lewis ◽  
Claudio Campagna ◽  
A. Rus Hoelzel
Keyword(s):  
Sampling Strategy ◽  
Elephant Seal ◽  
Foraging Strategies ◽  
Southern Elephant Seal ◽  
South American ◽  
Prey Choice ◽  
Mirounga Leonina ◽  
Elephant Seals ◽  
Sea Lions ◽  
Southern Elephant Seals

The evolution of resource specializations is poorly understood, especially in marine systems. The southern elephant seal ( Mirounga leonina ) is the largest of the phocid seals, sexually dimorphic, and thought to prey predominantly on fish and squid. We collected vibrissae from male and female southern elephant seals, and assessed stable C and N isotope ratios along the length of the vibrissae. Given that whiskers grow slowly, this sampling strategy reflects any variation in feeding behaviour over a period of time. We found that isotopic variation among females was relatively small, and that the apparent prey choice and trophic level of females was different from that for males. Further, males showed a very broad range of trophic/prey choice positions, grouped into several clusters, and this included isotopic values too low to match a broad range of potential fish and cephalopod prey tested. One of these clusters overlapped with data for South American sea lions ( Otaria flavescens ), which were measured for comparison. Both male southern elephant seals and southern sea lions forage over the continental shelf, providing the potential for competition. We discuss the possibility that individual southern elephant seals are pursuing specialist foraging strategies to avoid competition, both with one another, and with the South American sea lions that breed nearby.

Postweaning behaviour in pups of the southern elephant seal (Mirounga leonina) on South Georgia

1997 ◽  
Vol 75 (4) ◽  
pp. 582-588 ◽  
Author(s):  
Anders Modig ◽  
Henri Engström ◽  
Tom Arnbom
Keyword(s):  
Vitamin D ◽  
Elephant Seal ◽  
Tooth Eruption ◽  
Southern Elephant Seal ◽  
Mirounga Leonina ◽  
South Georgia ◽  
Resting Behaviour ◽  
Significant Difference ◽  
Save Energy ◽  
Daytime Behaviour

After weaning, southern elephant seal pups (Mirounga leonina) fast for 3 – 8 weeks, for largely unknown reasons. During the postweaning fast we observed daytime behaviour and movements of pups on South Georgia in relation to mass, sex, and tooth eruption. There was variation in behaviour, with the lowest levels of activity from about 09:00 to 15:00. When ashore, weaned pups spent 97% of the time resting. There was no difference in activity between the sexes, except that only male pups were observed fighting. There was a significant difference in tooth eruption between the sexes. In female pups, 87.9% had teeth at weaning, while only 28.7% of male pups had. There was no correlation between mass at weaning and activity in either sex. Weaned pups tended to gather in groups (median group size 3, range 2 – 67). Several factors may affect the behaviour of pups during the postweaning fast: the resting behaviour required to save energy favours spending time ashore during the day (which also enhances vitamin D synthesis), and foraging is more effectively practiced at night because their prey is more active at night.

scholarly journals A review of the recent records of pinnipeds (Mammalia, Carnivora) on the coast of Espírito Santo state, Brazil

Check List ◽  
2016 ◽  
Vol 12 (6) ◽  
pp. 2015 ◽  
Author(s):  
Luis Felipe S. P. Mayorga ◽  
Renata Hurtado ◽  
Ralph Eric Thijl Vanstreels ◽  
Renata Cristina Campos Bhering ◽  
João Luiz Rossi Junior
Keyword(s):  
Scientific Literature ◽  
Elephant Seal ◽  
Southern Elephant Seal ◽  
South American ◽  
Mirounga Leonina ◽  
Breeding Colony ◽  
Espírito Santo ◽  
Occurrence Data ◽  
Fur Seal ◽  
Espirito Santo

To improve the knowledge of the occurrence of pinnipeds along the coast of Espírito Santo state, Brazil, we compiled occurrence data of pinnipeds from the period from 1987 to 2010 based on the scientific literature, newspapers and novel observations. Twenty-two records were found, which correspond to three species: South American Fur Seal (Arctocephalus australis), Subantarctic Fur Seal (Arctocephalus tropicalis), and Southern Elephant Seal (Mirounga leonina). All records of pinnipeds are limited to the state’s southern coast (south of 20˚07ʹ S), which is consistent with the southern origin of these vagrant individuals. However, there may be bias due to the larger human population density in that region and the greater likelihood of observation. All records for which the date is known occurred during June to September, the austral winter. These records demonstrate that although the Espírito Santo coast is more than 2,000 km north from the nearest breeding colony of these species, it may still serve as wintering grounds for vagrant pinnipeds.

Impact Of Colonial Sealing On Seal Stocks Around Australia, New Zealand And Subantarctic Islands Between 150 And 170 Degrees East

2002 ◽  
Vol 24 (1) ◽  
pp. 117 ◽  
Author(s):  
JK Ling
Keyword(s):  
New Zealand ◽  
Elephant Seal ◽  
Southern Elephant Seal ◽  
Mirounga Leonina ◽  
Sources Of Information ◽  
Sea Lions ◽  
Fur Seals ◽  
Fur Seal ◽  
Seal Oil ◽  
The Impact

Details of southern elephant seal oil and fur seal and sea lion skin cargoes have been extracted from a large number of secondary sources dealing with Australian and New Zealand maritime history, which in turn referred to numerous primary sources of information. The data were collated and analysed for ten areas in the south-west Pacific region and published recently in two separate larger works. This review is a synthesis and analysis of the impact of the colonial sealing industry on seal stocks in the region, based on those papers, with some minor revisions and reference to works by other authors. Colonial sealing lasted from the late 18th to the mid- 19th century and was followed by sporadic hunting until the late 1940s. Southern elephant seals (Mirounga leonina) were hunted for their oil; and Australian fur seals (Arctocephalus pusillus doriferus), New Zealand fur seals (Arctocephalus forsteri), Australian sea lions (Neophoca cinerea) and New Zealand sea lions (Phocarctos hookeri) were targeted for their skins and some oil. At least 1,081 tons of elephant seal oil were shipped from King Is. between 1802 and 1819, while 8,380 tons were shipped from Macquarie Is. between 1810 and 1919. More than 1.4 million skins of both species of fur seals were harvested between 1792 and 1949, but only 4,000 Neophoca and 5,700 Phocarctos pelts are recorded as having been shipped by 1840. The Antipodes Islands yielded more than a quarter of the total fur seal skin harvest, and New Zealand and southern Australia each delivered a quarter of the total. Current numbers of the two species of fur seals combined are about a tenth of the crudely estimated size (1.5 million) of the original population. The exploited fur seals and sea lions were probably the same species as occur today at the original sealing localities, apart from Macquarie Is. where the identity of the exploited fur seals remains in doubt. There is some evidence that Maoris and Australian Aborigines hunted seals in pre-European times, resulting in reduced ranges and depleted stocks that were exploited later by colonial sealers.

scholarly journals How Perceived Sensory Dimensions of Forest Park Are Associated with Stress Restoration in Beijing?

2022 ◽  
Vol 19 (2) ◽  
pp. 883
Author(s):  
Congying An ◽  
Jinglan Liu ◽  
Qiaohui Liu ◽  
Yuqi Liu ◽  
Xiaoli Fan ◽  
...  
Keyword(s):  
Mixed Model ◽  
Linear Mixed Model ◽  
Individual Characteristics ◽  
Forest Park ◽  
Positive Effects ◽  
Activity Intensity ◽  
Visit Frequency ◽  
Significant Difference ◽  
Visit Duration ◽  
Forest Parks

A growing number of studies suggest that the perceived sensory dimensions (PSDs) of green space are associated with stress restoration offered by restorative environment. However, there is little known about PSDs and stress restoration as well as their relationship to forest park. To fill this gap, an on-site questionnaire survey was conducted in three forest parks in Beijing, as a result of which a total number of 432 completed responses were collected and analyzed. The mean values of PSDs were used to represent PSDs of forest park. Using independent sample t-test and ANOVA, this study analyzed the individual characteristics that affected PSDs and stress restoration. Linear mixed model was used to identify the relationship between PSDs and stress restoration of forest park, which took into account the interactions of stress level and PSDs. The results showed that: (1) the perceived degree of PSDs in forest park from strong to weak was Serene, Space, Nature, Rich in species, Prospect, Refuge, Social and Culture, which varied with visitors’ gender, age, level of stress, visit frequency, activity intensity, visit duration and commuting time; (2) in PSDs, Refuge, Serene, Social and Prospect had significantly positive effects on the stress restoration of forest parks (3) there was no significant difference in the effect of the eight PSDs on the stress restoration between different stress groups; (4) stress restoration was influenced by visitors’ gender, age, visit frequency and visit duration. These findings can offer references for managers to improve the health benefits of forest park for visitors, and can enrich the knowledge about PSDs and stress restoration.

scholarly journals The nasopharyngeal, ruminal, and vaginal microbiota and the core taxa shared across these microbiomes in virgin yearling heifers exposed to divergent in utero nutrition during their first trimester of gestation and in pregnant beef heifers in response to mineral supplementation

2021 ◽  
Author(s):  
Samat Amat ◽  
Devin B Holman ◽  
Kaycie Schmidt ◽  
Ana Clara B Menezes ◽  
Friederike Baumgaertner ◽  
...  
Keyword(s):  
Mixed Model ◽  
Linear Mixed Model ◽  
First Trimester ◽  
Nervous System Development ◽  
Vaginal Microbiota ◽  
Rrna Gene ◽  
Beef Heifers ◽  
Mineral Supplement ◽  
Alpha And Beta Diversity ◽  
Significant Difference

Emerging evidence has indicated that microbial transmission from the bovine dam to her fetus may take place before birth, and that the maternal microbiota during pregnancy modulates programming of fetal metabolic and nervous system development, highlighting the potential and extended role of the maternal microbiome in calf health and development. In the present study, we characterized the nasopharyngeal, ruminal and vaginal microbiota from two cohorts of beef heifers managed at the same location: 1) virgin yearling heifers (9 months old) born from dams received gestational diets which resulted in low (LG, n = 22) or medium (MG, n = 23) weight gain during the first 84 days of gestation; and 2) pregnant replacement heifers that received a vitamin and mineral supplement (VTM, n = 17) or not (Control, n = 15) during the first 6 months of gestation. Nasopharyngeal and vaginal swabs as well as ruminal fluid were collected from both cohorts and the microbiota of each sample was assessed using 16S rRNA gene sequencing. In addition to the comparison between treatment groups within each cohort, the similarity of the microbiota of the three sample types were evaluated, and shared taxa amongst these communities were identified. The bacterial genera present in the rumen and vagina that can influence methanogenic archaeal genera were predicted using a stepwise-selected generalized linear mixed model. No significant difference was observed in the alpha and beta diversity in any of the nasopharyngeal, ruminal and vaginal microbiota between LG and MG offspring virgin heifers, or between the control and VTM pregnant heifers (p > 0.05). Subtle compositional changes in the vaginal microbiota in yearling heifers, and in the nasopharyngeal and ruminal microbiota of pregnant heifers were detected in response to treatments. Forty-one archaeal and bacterial OTUs were shared by over 60% of all samples from both virgin and pregnant heifers. Two taxa within the Methanobrevibacter genus were identified as core taxa and this genus was more relatively abundant in pregnant heifers compared to virgin heifers. Among the 25 top genera, Prevotella and Prevotella UCG-003 (negative) and Christensenellaceae R-7 group (positive) were predicted to have a significant effect on ruminal Methanobrevibacter spp. The results of this study indicate that there is little impact of divergent gestational nutrition during the first trimester on the calf microbiome at 9 months postnatal, and that VTM supplementation during pregnancy may not alter the maternal microbiome. This study provides evidence that there are several microbial taxa, including methanogenic archaea, that are shared across the respiratory, gastrointestinal, and reproductive tracts, suggesting the need for a holistic evaluation of the bovine microbiota when considering potential maternal sources for seeding calves with pioneer microbiota.

Abstract NS10: Patients with Mild and Moderate Stroke Have Frequent, Severe, and Persistent Impairment in Information Processing Speed

Stroke ◽  
2017 ◽  
Vol 48 (suppl_1) ◽  
Author(s):  
Susan Alderman ◽  
Terri Armstrong ◽  
Geri Wood ◽  
Sean Savitz ◽  
Joshua Breier
Keyword(s):  
Information Processing ◽  
Processing Speed ◽  
Memory Impairment ◽  
Mixed Model ◽  
Linear Mixed Model ◽  
Stroke Recovery ◽  
Stroke Severity ◽  
Information Processing Speed ◽  
Significant Difference ◽  
Mild Stroke

Background: One year after stroke 50-70% of survivors have information processing speed (IPS) impairment. IPS is a complex, elemental cognitive function with close but separate relationships with memory, attention, executive function, reading, and writing. IPS impairment can be devastating, even without physical deficits. Hypothesis: The frequency and severity of IPS impairment in patients with acute stroke is unrelated to stroke severity. Methods: In a longitudinal study, 30 adults with acute mild (NIHSS <5) versus moderate stroke (NIHSS 5-12) were assessed for IPS and memory impairments at three time points (< 72 hours, Week 3, and Week 12). The Symbol Digit Modalities Test (SDMT) was the primary IPS instrument, scores below the norm (51-62 points) indicate impairment. Results: Using linear mixed model regression, no significant difference was noted between patients with mild and moderate stroke in frequency and severity of IPS impairment (p=0.2). All patients had baseline abnormal SDMT scores, improving 21% by Week 12 (p=.005) with one patient scoring as unimpaired (51 points). Patients with mild stroke (n=18) had baseline scores on average 53% lower than SDMT norm (mean score 24 (12), [95% CI] 6 [18, 30], Standard Error (SEM) 3) and 32% lower at Week 12 (mean 34 (11), [95% CI] 5 [29, 40], SEM 3). Patients with moderate stroke (n=12) had baseline SDMT scores 60% lower than norm (mean 21 (11), [95% CI] 6 [15, 27], SEM 3) and 39% lower by Week 12 (mean 31 (12), [95% CI] 7 [25, 38], SEM 3). Memory impairment at enrollment (<72 hours post stroke) was noted in 100% of patients with moderate stroke and 78% of patients with mild stroke; at Week 12 the frequency of memory impairment was equal in both groups (67%). Conclusion: IPS were critically impaired, in both mild and moderate stroke, with minimal spontaneous recovery at Week 12. IPS impairment is clinically significant during stroke recovery. IPS impairment should be considered in the planning of healthcare of stroke victims even with mild stroke.

Appetite-stimulating effect of gabapentin vs mirtazapine in healthy cats post-ovariectomy

2020 ◽  
Vol 22 (12) ◽  
pp. 1176-1183
Author(s):  
Marco Fantinati ◽  
Julien Trnka ◽  
Amélia Signor ◽  
Séverine Dumond ◽  
Géraldine Jourdan ◽  
...  
Keyword(s):  
Placebo Group ◽  
Food Intake ◽  
Mixed Model ◽  
Linear Mixed Model ◽  
Repeated Measure ◽  
Mixed Model Analysis ◽  
Treatment Groups ◽  
Significant Difference ◽  
Post Hoc ◽  
Difference Test

Objectives The aim of the study was to evaluate the appetite-stimulating effect of gabapentin by comparing it with mirtazapine in healthy cats in the first 8 h after ovariectomy surgery. Methods This double-masked, placebo-controlled, prospective clinical trial included 60 healthy cats presented to the hospital for ovariectomy: 20 received gabapentin, 21 received mirtazapine and 19 received a placebo immediately before and 6 h after surgery. Food was offered at 2, 4, 6 and 8 h post-ovariectomy. After each meal, food intake was measured. Data were analysed using repeated-measure ANOVA and a linear mixed-model analysis. Post-hoc Tukey’s honest significant difference test was performed for multiple comparisons. Results Food intake increased in both treatment groups vs placebo. No statistically significant difference was found between cats treated with gabapentin or mirtazapine. Conclusions and relevance Cats receiving gabapentin ate more than cats in the placebo group. Thirty percent of cats in the gabapentin group covered their resting energy requirements, while none of the cats in the placebo group did. Gabapentin and mirtazapine produced similar effects on food intake.

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