POPULATION ASPECTS OF CROCODYLUS ACUTUS (REPTILIA: CROCODYLIDAE) IN THE ESTUARY EL SALADO, PUERTO VALLARTA JALISCO, MEXICO

2018 ◽  
Vol 11 (41-42) ◽  
Author(s):  
Javier Efraín Rubio-Miranda
Keyword(s):  
Growth Rate ◽  
Mortality Rate ◽  
Age Structure ◽  
Protected Area ◽  
Conservation Strategies ◽  
Population Abundance ◽  
Mangrove Swamp ◽  
Crocodylus Acutus ◽  
Made In

<p>A population of <em>C. acutus </em>was studied in the Natural Protected Area “Estero el Salado” in Puerto Vallarta, Jalisco, México, among november of 2015 and september of 2016. The population abundance was evaluated and the age structure, mortality rate and growth rate were analized. Five samplings were performed in November, December, March, April and September, in order to carry on the species monitoring, finding an abundance of 15.74 ind/km SD ± 6.65, and the neonates population’s mortality rate, which showed constant values, increasing the neonates survivorship. As well the age structure was analized and it was consisted of 62.5% neonates, 28.5 juveniles and 9% sub-adults, without presence of adults, subsequently catches of the organisms were made in order to measure the total lenght of crocodiles, and thereby obtain the growth rate, wich was between 0.12 y 0.17 cm/day. This is the first study that analized the mortality rate of <em>C. acutus</em> neonates in a mangrove swamp, therefore this information could be used to perform better conservation strategies.</p>

scholarly journals Through what mechanisms do protected areas affect environmental and social outcomes?

2015 ◽  
Vol 370 (1681) ◽  
pp. 20140267 ◽  
Author(s):  
Paul J. Ferraro ◽  
Merlin M. Hanauer
Keyword(s):  
Experimental Data ◽  
Protected Areas ◽  
Empirical Evidence ◽  
Strong Evidence ◽  
Protected Area ◽  
Evidence Base ◽  
Social Outcomes ◽  
Causal Effects ◽  
The Past ◽  
Made In

To develop effective protected area policies, scholars and practitioners must better understand the mechanisms through which protected areas affect social and environmental outcomes. With strong evidence about mechanisms, the key elements of success can be strengthened, and the key elements of failure can be eliminated or repaired. Unfortunately, empirical evidence about these mechanisms is limited, and little guidance for quantifying them exists. This essay assesses what mechanisms have been hypothesized, what empirical evidence exists for their relative contributions and what advances have been made in the past decade for estimating mechanism causal effects from non-experimental data. The essay concludes with a proposed agenda for building an evidence base about protected area mechanisms.

Age Structure and Growth in the Zamda Toad, Bufotes zamdaensis (Anura, Bufonidae)

2021 ◽  
Vol 28 (3) ◽  
pp. 138-144
Author(s):  
Sergey M. Lyapkov ◽  
Artem A. Kidov ◽  
Irina V. Stepankova ◽  
Kirill A. Afrin ◽  
Spartak N. Litvinchuk
Keyword(s):  
Growth Rate ◽  
Age Structure ◽  
Related Species ◽  
Mean Value ◽  
Himachal Pradesh ◽  
Closely Related Species

The paper provides the first data about age structure and growth of the Zamda toad, Bufotes zamdaensis (Boulenger, 1882), from the Himachal Pradesh State (India). The study of age structure of toads was carried out using skeletochronology. The minimal and maximal ages in males of B. zamdaensis were 4 and 7 years, respectively, with mean age of 5.4 years. The majority of males (60%) were 5 years old. The age in females ranged from 5 to 9 years with mean value of 6.1 years. The majority of females (71%) were 5 – 6 years old. Males of B. zamdaensis can reach maturation after four winterings and females after five winterings. Unlike closely related species B. latastii, the growth rate in both sexes does not decrease significantly after the 1st and 2nd wintering and remains high after the 3rd and 4th wintering.

scholarly journals Relationship Between Depression and Strength Training in Survivors of the Ischemic Stroke

2014 ◽  
Vol 43 (1) ◽  
pp. 7-15 ◽  
Author(s):  
Felipe José Aidar ◽  
Dihogo Gama de Matos ◽  
Ricardo Jacó de Oliveira ◽  
André Luiz Carneiro ◽  
Breno Guilherme de Araújo Tinôco Cabral ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Mortality Rate ◽  
Strength Training ◽  
Lower Limb ◽  
Control Group ◽  
Cerebral Vascular Accident ◽  
Training Assessment ◽  
Post Test ◽  
Experimental Group ◽  
Made In

Abstract The Cerebral Vascular Accident is responsible for a significant increase in the mortality rate in individuals who have suffered this condition, regardless of the level of subsequent disability. This study aimed to analyze the influence of a strength training program on indicators of depression in survivors of the ischemic stroke. The study sample included subjects from both genders who were divided into two groups: an experimental group (EG) consisting of 11 subjects aged 51.7 8.0 years, and a control group (CG) consisting of 13 subjects aged 52.5 7.7 years. The EG underwent 12 weeks of strength training. Assessment was made in the pre-test before training and at the re-test after 12 weeks of training. We used the Beck Depression Inventory and evaluated 1RM. Significant differences in depression were found between post-test and pretest measurements (Δ% = -21.47%, p = 0,021) in the EG; furthermore, there were significant differences in all indicators of depression between the EG and CG after completing 12 weeks of training. There were significant gains in strength of the EG in relation to the CG. There was a negative correlation between the strength gains as determined with the 1RM test and the levels of depression, especially in lower-limb exercises. The results of this study suggest that improvements in strength are negatively correlated with levels of depression. Improvements in strength are therefore associated with a reduction in levels of depression.

Movement, Growth and natural mortality rate of the Red Spot King Prawn, Penaeus longistylus Kubo, from the Great Barrier Reef Lagoon

1990 ◽  
Vol 41 (3) ◽  
pp. 399 ◽  
Author(s):  
MCL Dredge
Keyword(s):  
Growth Rate ◽  
Mortality Rate ◽  
Great Barrier Reef ◽  
Annual Variation ◽  
Growth Parameters ◽  
Natural Mortality ◽  
Barrier Reef ◽  
Fishing Mortality ◽  
Nursery Areas ◽  
Reef Lagoon

Movement, growth and natural mortality rate of the red spot king prawn, Penaeus longistylus, occurring in waters of the Great Barrier Reef off Townsville, Queensland, were investigated in a series of tagging experiments. Adult P. longistylus did not migrate after leaving nursery areas. Their growth rate was slower than that of the conspecific species P. plebejus, and significant inter-annual variation in growth parameters was observed. The natural mortality rate, assessed by sequential tagging experiments that eliminated the possibility of confounding with the rate of fishing mortality, was estimated to be 0.072 (week-1).

scholarly journals Philately’s Implications in Ecological Education via Romanian Thematic Joint Issues (IV)- Regarding the 2nd Collaboration with WWF

2021 ◽  
pp. 66-81
Author(s):  
Bogdan-Vasile Cioruța ◽  
Alexandru Leonard Pop ◽  
Mirela Coman
Keyword(s):  
Natural Capital ◽  
Biosphere Reserve ◽  
Conservation Strategies ◽  
Habitat Alteration ◽  
Ecological Education ◽  
The Public ◽  
Adequate Information ◽  
Postage Stamps ◽  
Danube Delta Biosphere Reserve ◽  
Made In

The project to promote the protected natural heritage and biodiversity continues with the 2nd collaboration of the Romanian postal administration with the World Wildlife Fund. Introducing in the scientific circulation the idea of thematic philately, for the protection of endangered species, this time we focused on the issue published in 1984. This is suggestively entitled “Animals protected in the Romanian reservations”. It should be mentioned that, at the end of 1984, the national thematic philately was enriched, with a series of postage stamps promoting pelicans. The philatelic issue comes to the public to confirm that in Romania (more exactly in Danube Delta Biosphere Reserve) there is the largest colony of common pelicans in Europe. The research emphasizes the mass character of thematic philately and its role as a cultural ambassador. The 1984 philatelic issue, underlines the implications of WWF, along with those of the Romanian postal administration, in promoting the natural capital to be protected. The issue itself has many philatelic effects (especially maximum postcards), both those made privately and officially, which we insisted. We wanted to show that such philatelic materials, made in collaboration with prestigious entities, are more than welcome in sounding the alarm about habitat alteration. Also, they can be the basis of various conservation strategies in terms of adequate information among tourists.

scholarly journals ANALYZING TEMPORAL AND SPATIAL TRENDS IN MANAGEMENT PLANS OF FEDERAL PROTECTED AREAS IN BRAZIL

2021 ◽  
Vol 25 (04) ◽  
pp. 846-854
Author(s):  
Alessandro Ribeiro Morais ◽  
◽  
Mariana Nascimento Siqueira ◽  
Roniel Freitas-Oliveira ◽  
Daniel Brito ◽  
...  
Keyword(s):  
Protected Areas ◽  
Protected Area ◽  
Sustainable Use ◽  
Management Plan ◽  
Conservation Strategies ◽  
Effective Management ◽  
Management Plans ◽  
Group A ◽  
The Creation ◽  
Group B

Protected areas are the most frequently used tool for the mitigation of threats to biodiversity. However, without effective management, the creation of new protected areas may be ineffective. In Brazil, protected areas must have both a governing body (consultative or deliberative council) and an official management plan. Here, we analyzed general trends and patterns in the approval of the management plans for Brazilian federal protected areas. We considered all federal protected areas, and compiled data on (i) the year the area was created, (ii) the type of protected area (integral protection vs. sustainable use), (iii) year its management plan was approved, (iv) year in which the management plan was revised after its approval, (v) total area (in hectares), and (vi) the biome in which the area is located. We stablished three groups of protected area: 1) Group A: protected areas created prior to 1979, 2) Group B: protected areas created between 1979 and 1999, and 3) Group C: protected areas created between 2000 to the present time. Finally, we tested whether time for the approval of the management plan suffered a simultaneous effect of the type of biome and type of categories of protected area (strictly protected vs. sustainable use areas). We found 211 (63.17% of the 334) protected areas with management plan. On average, the time taken for the creation and approval of a management plan far exceeds the deadlines (5 yrs.) defined under current Brazilian law. All Brazilian biomes are poorly covered by protected areas with effective management plans, with the highest and lowest value observed in the Pantanal (100%) and Caatinga (46.42%), respectively. Our results suggest that the effectiveness of many federal protected areas in Brazil can be reduced considerably by the lack of a management plan, with deleterious consequences for the country’s principal conservation strategies.

scholarly journals Estimating abundance of the Endangered onager Equus hemionus onager in Qatruiyeh National Park, Iran

Oryx ◽  
2013 ◽  
Vol 47 (2) ◽  
pp. 266-272 ◽  
Author(s):  
Mahmoud-Reza Hemami ◽  
Moslem Momeni
Keyword(s):  
Growth Rate ◽  
Protected Area ◽  
National Park ◽  
Natural Populations ◽  
Distance Sampling ◽  
Line Transect ◽  
Management Interventions ◽  
Equus Hemionus ◽  
Wild Ass ◽  
Semi Arid

AbstractHistorically, the onager or Persian wild ass Equus hemionus onager, endemic to Iran, was widespread on the arid and semi-arid central steppes but only two natural populations remain. We estimated the population density of the onager in Qatruiyeh National Park using line transect distance sampling. Transects were surveyed on three plains in the Park and the results compared with total counts conducted by the Department of Environment. Our estimate (109 onagers per 100 km2; 95% confidence interval 67–179) is similar to that obtained by the total counts (137 onagers per 100 km2). Distance sampling is therefore a promising method for estimating the abundance of the onager. Using the annual censuses performed by the Department of Environment over the last 13 years we estimated that the population has a growth rate of 0.09. During the same period the onager population in the Touran Protected Complex has experienced a severe decline. The high density of onagers within the National Park indicates the unsuitability of adjacent habitats, including Bahram-e-Goor Protected Area, for this species. Lack of sufficient security and poorly distributed water sources appear to be the main reasons discouraging onagers from entering the Bahram-e-Goor Protected Area. We recommend and describe management interventions that could potentially assist in maintaining the last surviving onager populations in Iran.

Paddlefish Management, Propagation, and Conservation in the 21st Century

2009 ◽  
Keyword(s):  
Growth Rate ◽  
Population Dynamics ◽  
Mortality Rate ◽  
Population Density ◽  
21St Century ◽  
High Growth ◽  
High Growth Rate ◽  
Demographic Groups ◽  
Annual Mortality ◽  
Remnant Population

<em>Abstract</em>.—Paddlefish <em>Polyodon spathula </em>vanished from areas of the upper Tombigbee River basin in Mississippi and Alabama during the 1950s, long before channelization and damming associated with construction of the Tennessee-Tombigbee Waterway (TTW) were completed in 1984. This study was undertaken to assess distribution and population dynamics of any remaining stock. Paddlefish were not captured in upstream impoundments, but an unexploited remnant population was located in the downstream impoundment: Demopolis Lake, Alabama. Paddlefish in Demopolis Lake were characterized by a population density of 2.6 fish/ha, high growth rate relative to more northern populations, and natural annual mortality rate (<em>A </em>= 0.406) similar to other southern populations. Two wintering habitats (cutoff bendways) were heavily utilized by paddlefish. Large males primarily inhabited the more lotic bendway while females and small males were more common in the more lentic bendway, indicating differential importance of habitats among demographic groups. The restricted distribution of TTW paddlefish and demographic differences between habitats suggest that areas heavily utilized by paddlefish should be protected from further degradation. Sedimentation has resulted in reductions of bendway depth and reduced connectivity of backwaters, reducing availability of suitable paddlefish habitat. Restoring connectivity of bendways through dredging could reverse this trend and provide other benefits to fisheries.

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