scholarly journals Demography and population structure of Northeastern mediterranean monk seal population

2020 ◽  
Author(s):  
MERVE KURT ◽  
ALI CEMAL GÜCÜ
Keyword(s):  
Population Size ◽  
Camera Traps ◽  
The Body ◽  
Closed Population ◽  
Open Population ◽  
Seal Population ◽  
Conservation Actions ◽  
Term Monitoring ◽  
Natural Marks

The Northeastern Mediterranean coasts that border southern Turkey host one of the last strongholds for the survival of the endangered Mediterranean monk seal (Monachus monachus, 1779). The seal colonies inhabiting south coast of Turkey have been studied since 1994 through various short-term research projects focusing on distinct small populations that were thought to be isolated. In this study, the entire extent of the area was monitored approximately for 3 years (between 2015 and 2018) with camera traps places in 20 caves known to be actively used by the seals. A total of 7014 images taken throughout the study period, along with 25,100 images taken previously, were used to identify the seals inhabiting the area.  In total, 37 individuals were identified based on the natural marks on the body. Based on photo-identified seals, a mark-recapture method was applied to estimate the total population size within the Northeastern Mediterranean. The overall population size was found to be 46 (SE=7.7) in the case of closed population and 53(SE=34.8) in the case of open population during the study period.  The range of identified seals was almost six times larger than previously documented in the same area, reaching distances up to 245 km. The population estimate indicated a decrease in population size compared to previous studies.  Finally, the study emphasises the importance of long-term monitoring studies elucidating changes in the demographic parameters in relation to threats posed, rather than cut-paste measurement suggestions which are not applicable in reality, while structuring the conservation actions targeting survival of this highly endangered species.

Independence of brain and tympanic temperatures in an unanesthetized human

1988 ◽  
Vol 65 (1) ◽  
pp. 482-486 ◽  
Author(s):  
K. Shiraki ◽  
S. Sagawa ◽  
F. Tajima ◽  
A. Yokota ◽  
M. Hashimoto ◽  
...  
Keyword(s):  
Skin Surface ◽  
The Body ◽  
Tympanic Temperature ◽  
The Face ◽  
Series Of Experiments ◽  
Long Term Monitoring ◽  
The Brain ◽  
Term Monitoring ◽  
Monitoring Temperature

Temperature within the brain and the esophagus and at the tympanum were obtained in a 12-yr-old male in a series of experiments that began 8 days after surgery for implantation of a drainage catheter. Fanning the face did reduce tympanic temperature but not temperature in the brain; brain temperatures followed esophageal temperatures. In long-term monitoring, temperature in the lateral ventricle was 0.5 degree C above esophageal temperature and 0.2 degree C below that in white matter 1 cm above, with the offsets fixed throughout the overnight cycle. All temperatures went through similar excursions when the face was excluded from fanning applied to the body. These observations highlight the fact that in humans the defense against hyperthermia takes advantage of cooling distributed over the entire skin surface.

Fire and its impact on avian population dynamics

1997 ◽  
Vol 3 (3) ◽  
pp. 206 ◽  
Author(s):  
G. Barry Baker ◽  
E. Belinda Dettmann ◽  
Stephen J. Wilson
Keyword(s):  
Population Size ◽  
Fire Regimes ◽  
Long Term Study ◽  
Sclerophyll Forest ◽  
In Fire ◽  
Avian Populations ◽  
The Impact ◽  
Term Monitoring ◽  
Probability Of Capture

Survival rate, population size, recruitment and probability of capture, derived from a long-term study of 20 passerine species in wet sclerophyll forest near Canberra, were used to measure the impact of a high intensity wildfire which burnt 70% of the study area. The wildfire significantly affected the population size of 13 species for a period of up to six years following the fire. Survival and recruitment were the least sensitive measures of impact and indicated a significant response to fire for only 2 of 10 species. We detected measurable effects of the fire for 17 of the 20 species studied. Many of these species had returned to prefire levels within three years, but for nine species the effects were still apparent six years later. Mark-recapture methodology provides an effective way of measuring the impact of fire regimes in forest environments. Long-term monitoring programmes should be established in fire-prone forest environments to contribute toward our understanding of fire, and its effect on avian populations. Such programmes have resource implications and researchers are urged to encourage the participation of the amateur bird banding community to contribute to such projects.

Change-in-ratio density estimator for feral pigs is less biased than closed mark - recapture estimates

2008 ◽  
Vol 35 (7) ◽  
pp. 695 ◽  
Author(s):  
Laura B. Hanson ◽  
James B. Grand ◽  
Michael S. Mitchell ◽  
D. Buck Jolley ◽  
Bill D. Sparklin ◽  
...  
Keyword(s):  
Estimation Method ◽  
Density Estimator ◽  
Density Estimates ◽  
Mark Recapture ◽  
Closed Population ◽  
Feral Pigs ◽  
Open Population ◽  
Detection Probabilities ◽  
Models Comparison

Closed-population capture–mark–recapture (CMR) methods can produce biased density estimates for species with low or heterogeneous detection probabilities. In an attempt to address such biases, we developed a density-estimation method based on the change in ratio (CIR) of survival between two populations where survival, calculated using an open-population CMR model, is known to differ. We used our method to estimate density for a feral pig (Sus scrofa) population on Fort Benning, Georgia, USA. To assess its validity, we compared it to an estimate of the minimum density of pigs known to be alive and two estimates based on closed-population CMR models. Comparison of the density estimates revealed that the CIR estimator produced a density estimate with low precision that was reasonable with respect to minimum known density. By contrast, density point estimates using the closed-population CMR models were less than the minimum known density, consistent with biases created by low and heterogeneous capture probabilities for species like feral pigs that may occur in low density or are difficult to capture. Our CIR density estimator may be useful for tracking broad-scale, long-term changes in species, such as large cats, for which closed CMR models are unlikely to work.

scholarly journals Elucidating Patterns in the Occurrence of Threatened Ground-Dwelling Marsupials Using Camera-Traps

Animals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 913 ◽  
Author(s):  
Claridge ◽  
Paull ◽  
Welbourne
Keyword(s):  
Mammalian Species ◽  
Sampling Strategy ◽  
Single Species ◽  
Camera Traps ◽  
Target Species ◽  
Baseline Information ◽  
The Relationship ◽  
Term Monitoring ◽  
Survey Effort

Establishing trends in endangered fauna against management efforts is a key but often challenging enterprise. Camera-traps offer a new and literal window into monitoring many different mammalian species. Getting it right demands seeking baseline information about how often target species interact with these devices, prior to setting a long-term monitoring strategy. We used a camera-trap array to collect detection data on three species of threatened ground-dwelling marsupials in south-eastern mainland Australia. Over a four-year period, occupancy estimates for two species of bandicoot (southern brown bandicoot Isoodon obesulus and long-nosed bandicoot Perameles nasuta) and a single species of rat-kangaroo (long-nosed potoroo Potorous tridatylus) were generated. These estimates were variously robust depending on visitation history, but nevertheless indicated persistence of these rare and otherwise under threat species. Detection probability for each species differed between study areas, type of management and with complexity of ground and shrub vegetation cover. The relationship between detection and vegetation structure dictated that survey effort was only robust where conditions were optimal for a given species. Outside of that further survey effort would be required to have confidence in survey outcome. In the future this would demand a different sampling strategy, be that through lengthening survey time or adding additional camera units at sites.

scholarly journals Four Years Continuous Monitoring Reveals Different Effects of Urban Constructed Wetlands on Bats

Land ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 1087
Author(s):  
Han Li ◽  
Radmila Petric ◽  
Zinah Alazzawi ◽  
Jake Kauzlarich ◽  
Rania H. Mahmoud ◽  
...  
Keyword(s):  
Community Composition ◽  
Constructed Wetlands ◽  
Wildlife Conservation ◽  
Artificial Wetlands ◽  
Bat Activity ◽  
Conservation Actions ◽  
Species Specific ◽  
The City ◽  
Term Monitoring

Proactive artificial wetland constructions have been implemented to mitigate the loss of wetlands and their ecosystem services. As wetlands are habitats for bats, short-term (one or two years) studies find that constructed wetlands can immediately increase local bat activity and diversity. However, it is not clear how constructed wetlands affect bats through time while the wetlands are aging. We collected four years of continuous bat acoustic monitoring data at two constructed wetlands in an urban park in Greensboro, NC, USA. We examined bat activity and community composition patterns at these wetlands and compared them with reference sites in the city. With four years of data, we found that the effects of constructed wetlands were both habitat- and species-specific. The wetland in forests significantly increased bat activity, while the wetland in the open grass altered bat community composition. Specifically, in terms of species, we found that over time, constructed wetlands no longer attracted more big brown, silver-haired, or evening bats than control sites while the wetlands aged, highlighting the need to study broadly how each bat species uses natural and artificial wetlands. We emphasize the importance of long-term monitoring and the periodical evaluation of wildlife conservation actions.

scholarly journals Monitoring for adaptive management in a trial reintroduction of the black-footed rock-wallabyPetrogale lateralis

Oryx ◽  
2016 ◽  
Vol 51 (3) ◽  
pp. 554-563 ◽  
Author(s):  
Rebecca West ◽  
John Llewellyn Read ◽  
Matthew James Ward ◽  
Wendy K. Foster ◽  
David A. Taggart
Keyword(s):  
Adaptive Management ◽  
South Australia ◽  
Recruitment Rate ◽  
Camera Traps ◽  
Food Sources ◽  
Nutritional Health ◽  
Introduced Predators ◽  
Long Term Monitoring ◽  
Term Monitoring

AbstractReintroduction practitioners must often make critical decisions about reintroduction protocols despite having little understanding of the reintroduction biology of the focal species. To enhance the available knowledge on the reintroduction biology of the warru, or black-footed rock-wallabyPetrogale lateralisMacDonnell Ranges race, we conducted a trial reintroduction of 16 captive individuals into a fenced predator and competitor exclosure on the An̲angu Pitjantjatjara Yankunytjatjara Lands in South Australia. We conducted seven trapping sessions and used radio-tracking and camera traps to monitor survival, reproduction and recruitment to the population over 36 months. Blood samples were collected pre-release and during two trapping sessions post-release to assess nutritional health. The survival rate of founders was 63%, with all losses occurring within 10 weeks of release. Post-release blood biochemistry indicated that surviving warru adapted to their new environment and food sources. Female warru conceived within 6 months of release; 28 births were recorded during the study period and 52% of births successfully recruited to the population. Our results suggest that captive-bred warru are capable of establishing and persisting in the absence of introduced predators. However, the high mortality rate immediately post-release, with only a modest recruitment rate, suggests that future releases into areas where predators and competitors are present should use a trial approach to determine the viability of reintroduction. We recommend that future releases of warru into unfenced areas include an intensive monitoring period in the first 3 months post-release followed by a comprehensive long-term monitoring schedule to facilitate effective adaptive management.

Research priorities for the Pilbara leaf-nosed bat (Rhinonicteris aurantia Pilbara form)

2016 ◽  
Vol 38 (2) ◽  
pp. 149 ◽  
Author(s):  
Viki A. Cramer ◽  
Kyle N. Armstrong ◽  
Robert D. Bullen ◽  
Ryan Ellis ◽  
Lesley A. Gibson ◽  
...  
Keyword(s):  
Meta Analysis ◽  
Activity Patterns ◽  
Mining Industry ◽  
Research Priorities ◽  
Current Data ◽  
Conservation Actions ◽  
Artificial Roost ◽  
Term Monitoring ◽  
Effective Conservation

Significant biodiversity offset funds have been allocated towards conservation research on threatened species as part of the environmental approvals process for resource development in the Pilbara region of Western Australia. One of these species is the Pilbara leaf-nosed bat (Rhinonicteris aurantia Pilbara form), which is entirely reliant on roosting in a limited number of caves and disused mines, many of which exist in the mineral-bearing strata that are the focus of mining activity. A research agenda for the Pilbara leaf-nosed bat was developed during a workshop attended by scientists, environmental consultants and mining industry representatives. Five research priorities were identified: (1) collate existing data contained within unpublished environmental surveys; (2) clarify and better characterise the number and distribution of day roosts; (3) better understand habitat requirements, particularly foraging habitat, and the movement of bats between roosts; (4) provide more robust estimates of total population and colony size, and improve understanding of social behaviour; and (5) investigate appropriate buffers in a range of mining contexts and protocols for artificial roost construction. Meta-analysis of current data, confirmation of potential day roosts, and long-term monitoring of activity patterns would rapidly increase our knowledge of the Pilbara leaf-nosed bat to enable effective conservation actions.

Ecotoxicology

1988 ◽  
Vol 7 (5) ◽  
pp. 437-441 ◽  
Author(s):  
F. Moriarty
Keyword(s):  
Acute Toxicity ◽  
Population Size ◽  
Second World War ◽  
World War ◽  
Lethal Effects ◽  
Synthetic Pesticides ◽  
Long Term Monitoring ◽  
Second World ◽  
Term Monitoring

1 Ecotoxicology is concerned ultimately with the effects of pollutants on populations not individuals. Sub-lethal effects, and changes to the environment, can have a greater impact on population size than does acute toxicity. 2 Effective concern about effects of pollutants on wildlife developed after the Second World War with the advent of synthetic pesticides, and the difficulties encountered then in the evaluation of the effects of insecticides are still with us. 3 Effects on wildlife are probably often unnoticed and to demonstrate causes of observed effects usually difficult. 4 Two underlying problems are that ecology is still a relatively young science and that we lack a consensus on the value of wildlife. 5 We need to improve our predictive abilities for effects of pollutants and we also need long-term monitoring schemes that have clear objectives.

scholarly journals Demography of a Eurasian lynx (Lynx lynx) population within a strictly protected area in Central Europe

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Stefano Palmero ◽  
Elisa Belotti ◽  
Luděk Bufka ◽  
Martin Gahbauer ◽  
Christoph Heibl ◽  
...  
Keyword(s):  
Protected Area ◽  
Recruitment Rate ◽  
Habitat Destruction ◽  
Camera Traps ◽  
Demographic Parameters ◽  
Lynx Lynx ◽  
Eurasian Lynx ◽  
Closed Population ◽  
Open Population ◽  
Population Turnover

AbstractLarge carnivores promote crucial ecosystem processes but are increasingly threatened by human persecution and habitat destruction. Successful conservation of this guild requires information on long-term population dynamics obtained through demographic surveys. We used camera traps to monitor Eurasian lynx between 2009 and 2018 in a strictly protected area in the Bohemian Forest Ecosystem, located in the core of the distribution of the Bohemian–Bavarian–Austrian lynx population. Thereby, we estimated sex-specific demographic parameters using spatial capture–recapture (SCR) models. Over 48,677 trap nights, we detected 65 unique lynx individuals. Density increased from 0.69 to 1.33 and from 1.09 to 2.35 individuals/100 km2 for open and closed population SCR models, respectively, with corresponding positive population growth rates (mean = 1.06). Estimated yearly sex-specific survival probabilities for the entire monitoring period were high (females 82%, males 90%) and per capita recruitment rate was low (females 12%, males 9%), indicating a low yearly population turnover. We ascertained an average number of recruits of 1.97 and a generation time of 2.64 years when considering resident reproducing females. We confirmed that reproduction in the study area took place successfully every year. Despite the overall increase in local lynx densities, the number of detected family groups remained constant throughout the study period. These results indicated that the strictly protected study area acts as a source for the multi-use landscapes in its surroundings. In this first open population SCR study on lynx, we provide sex-specific demographic parameters that are fundamental information for lynx management in the study area as well as in similar contexts Europe-wide.

scholarly journals Is Continuous Heart Rate Monitoring of Livestock a Dream or Is It Realistic? A Review

Sensors ◽  
2020 ◽  
Vol 20 (8) ◽  
pp. 2291 ◽  
Author(s):  
Luwei Nie ◽  
Daniel Berckmans ◽  
Chaoyuan Wang ◽  
Baoming Li
Keyword(s):  
Heart Rate ◽  
Production Efficiency ◽  
The Body ◽  
Metabolic Energy ◽  
Farm Animals ◽  
Sensor Technology ◽  
Living Organisms ◽  
Term Monitoring ◽  
Core Variable

For all homoeothermic living organisms, heart rate (HR) is a core variable to control the metabolic energy production in the body, which is crucial to realize essential bodily functions. Consequently, HR monitoring is becoming increasingly important in research of farm animals, not only for production efficiency, but also for animal welfare. Real-time HR monitoring for humans has become feasible though there are still shortcomings for continuously accurate measuring. This paper is an effort to estimate whether it is realistic to get a continuous HR sensor for livestock that can be used for long term monitoring. The review provides the reported techniques to monitor HR of living organisms by emphasizing their principles, advantages, and drawbacks. Various properties and capabilities of these techniques are compared to check the potential to transfer the mostly adequate sensor technology of humans to livestock in term of application. Based upon this review, we conclude that the photoplethysmographic (PPG) technique seems feasible for implementation in livestock. Therefore, we present the contributions to overcome challenges to evolve to better solutions. Our study indicates that it is realistic today to develop a PPG sensor able to be integrated into an ear tag for mid-sized and larger farm animals for continuously and accurately monitoring their HRs.

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