scholarly journals Use of a mechanistic growth model in evaluating post-restoration habitat quality for juvenile salmonids

2019 ◽  
Author(s):  
Carlos M. Polivka ◽  
Joseph R. Mihaljevic ◽  
Greg Dwyer
Keyword(s):  
Habitat Quality ◽  
Growth Parameters ◽  
Habitat Type ◽  
Growth Patterns ◽  
Habitat Model ◽  
Individual Growth ◽  
Spatially Explicit ◽  
Model Parameters ◽  
Growth Data ◽  
Habitat Differences

AbstractIndividual growth data are useful in assessing relative habitat quality, but this approach is less common when evaluating the efficacy of habitat restoration. Furthermore, available models describing growth are infrequently combined with computational approaches capable of handling large data sets. We apply a mechanistic model to evaluate whether selection of restored habitat can affect individual growth. We used mark-recapture to collect size and growth data on sub-yearling Chinook salmon and steelhead in restored and unrestored habitat in five sampling years (2009, 2010, 2012, 2013, 2016). Modeling strategies differed for the two species: For Chinook, we compared growth patterns of individuals recaptured in restored habitat over 15-60 d with those not recaptured regardless of initial habitat at marking. For steelhead, we had enough recaptured fish in each habitat type to use the model to directly compare habitats. The model generated spatially explicit growth parameters describing size of fish over the growing season in restored vs. unrestored habitat. Model parameters showed benefits of restoration for both species, but that varied by year and time of season, consistent with known patterns of habitat partitioning among them. The model was also supported by direct measurement of growth rates in steelhead and by known patterns of spatio-temporal partitioning of habitat between these two species. Model parameters described not only the rate of growth, but the timing of size increases, and is spatially explicit, accounting for habitat differences, making it widely applicable across taxa. The model usually supported data on density differences among habitat types in Chinook, but only in a couple of cases in steelhead. Modeling growth can thus prevent overconfidence in distributional data, which are commonly used as the metric of restoration success.

scholarly journals Age and individual growth of Mesodesma mactroides (Bivalvia) in the southernmost range of its distribution

2004 ◽  
Vol 61 (8) ◽  
pp. 1253-1259 ◽  
Author(s):  
Sandra M. Fiori ◽  
Enrique M. Morsán
Keyword(s):  
Growth Parameters ◽  
Atlantic Coast ◽  
Sandy Beaches ◽  
Growth Patterns ◽  
Individual Growth ◽  
Size Frequency Distribution ◽  
Frequency Distributions ◽  
Growth Increments ◽  
Size Frequency ◽  
External Shell

Abstract The yellow clam, Mesodesma mactroides, is an intertidal bivalve typical from sandy beaches of the South American Atlantic coast. Growth parameters of southernmost populations of M. mactroides were studied and compared with other populations. Thin shell sections were examined to describe internal shell layers and to contrast with external shell transparency. Periodicity of deposition of external growth increments was studied recording the degree of transparency of the shell border. Growth patterns were determined using modal progression analysis from size frequency distributions, analysis of external shell increments, and size-at-age data derived from inner shell layers. Growth parameters were described using the von Bertalanffy growth model. Both internal and external patterns were coincident and exhibited a succession of one translucent and one opaque region. The transparent region was deposited during summer. Growth differences found between populations may be related to unequal size of first ring in both beaches. This feature may originate from asynchrony in spawning and recruitment. The monthly analysis of shell length size frequency distribution shows that growth of M. mactroides is seasonal. Estimations of asymptotic size of studied populations and others located at the southern (coldest) half of the geographical range of distribution suggest a negative relation with latitude.

scholarly journals EFEK KERAGAMAN TIPE HABITAT TERHADAP STRUKTUR POPULASI DAN MORFOMETRIK ABALON HALIOTIS ASININA LINNAEUS, 1758

2020 ◽  
Vol 20 (1) ◽  
pp. 29
Author(s):  
Ermayanti Ishak ◽  
Isdradjad Setyobudiandi ◽  
Fredinan Yulianda ◽  
Mennofatria Boer ◽  
Bahtiar Bahtiar
Keyword(s):  
Growth Parameters ◽  
Strong Relationship ◽  
Growth Patterns ◽  
Size Class ◽  
Regression Equations ◽  
Growth Data ◽  
Habitat Types ◽  
Haliotis Asinina ◽  
Rocky Habitats ◽  
The Relationship

Abstrak:  Abalon (H.asinina) adalah kelompok gastropoda laut bernilai komersial dan tersebar di perairan Soropia Sulawesi Tenggara.  H. asinina menyukai tipe habitat khusus, seperti habitat berbatu yang ditumbuhi alga dan habitat padang lamun. Bokori dan Toronipa mewakili 2 tipe habitat khusus tersebut yang lokasinya berada di perairan Soropia. Penelitian bertujuan untuk mengkaji pertumbuhan populasi abalon (H. asinina) pada habitat yang berbeda melalui hubungan dimensi morfometrik, faktor kondisi, dan komposisi kelompok ukuran. Data pertumbuhan dianalisis dengan persamaan regresi non linier menggunakan program data analisis dalam MS. Excel 2010. Hubungan antara L dengan Wt dan L dengan Lc di 2 lokasi menunjukkan hubungan yang positif dan kuat (R2 < 70%), sedangkan hubungan antara L dengan dimensi lainnya seperti Bc, Tc, Lc, dan Vc menunjukkan hubungan yang lemah.  Pola pertumbuhan di Bokori terdiri atas pertumbuhan isometrik dan alometrik negatif, sedangkan Toronipa, pola pertumbuhannya alometrik negatif.   Faktor kondisi rata-rata berfluktuasi setiap bulan dengan nilai tertinggi di Bokori. Perairan Bokori didominasi oleh persentase kelompok juvenil sebesar 52.22% pada kelas ukuran 27.4-49.62 mm. Toronipa didominasi oleh persentase kelompok dewasa sebesar 66.67% pada kelas ukuran 50.62-84.42 mm. Keragaman tipe habitat memengaruhi parameter pertumbuhan abalon (H.asinina). Hasil penelitian diharapkan menjadi informasi penting bagi upaya merumuskan pengelolaan sumber daya abalon yang tepat.Kata Kunci: Keragaman Habitat, Pertumbuhan, H. asinina, Morfometrik, Struktur PopulasiAbstract: Abalone (Haliotis asinina) is a marine gastropod which has commercial value. Abalone spread in the waters of Soropia, Southeast Sulawesi.  H. asinina likes special habitat types, such as rocky habitats overgrown with algae and seagrass habitats. Bokori and Toronipa represent these two special habitat types which are located in Soropia waters. The study aims to assess the growth of abalone (H. asinina) populations in different habitats through the relationship of morphometric dimensions, condition factors, and composition of size groups.  Growth data were analyzed by non-linear regression equations using data analysis programs in MS. Excel 2010.  The relationship between L with Wt and L with Lc at 2 locations shows a positive and strong relationship (R2 <70%), while the relationship between L and other dimensions such as Bc, Tc, Lc, and Vc shows a weak relationship.  Growth patterns in Bokori consist of isometric and allometric negative growths, while Toronipa, the pattern of negative allometric growth. The average condition factor fluctuates in each month of observation and the highest in Bokori.  Bokori waters are dominated by percentage of juvenile groups of 52.22%  in the size class of 27.4-49.62 mm. Toronipa is dominated by adult or broodstock abalone of 66.67% in the size class of 50.62-84.42 mm.  Toronipa is dominated by the percentage of the adult group at 66.67% in the size class of 50.62-84.42 mm. The diversity of habitat types affects the growth parameters of abalone (H.asinina).  The results of study are expected to be important information for efforts to formulate appropriate abalone resource management.Keywords: Diversity of Habitat, Growth, H. asinina, Morphometric, Population structure

Growth of Ligia exotica (Isopoda: Oniscidea: Ligiidae) in two estuarine regions of Patos Lagoon, Rio Grande do Sul, Brazil

2009 ◽  
Vol 89 (4) ◽  
pp. 735-741 ◽  
Author(s):  
Elis R. Lopes-Leitzke ◽  
Luiz F.C. Dumont ◽  
Fernando D'Incao
Keyword(s):  
Growth Parameters ◽  
Environmental Parameters ◽  
Rio Grande ◽  
Growth Patterns ◽  
Individual Growth ◽  
Von Bertalanffy ◽  
Rio Grande Do Sul ◽  
Patos Lagoon ◽  
Different Populations ◽  
Two Populations

The aim of this study was to estimate growth parameters of two populations of Ligia exotica inhabiting discrete estuarine areas of Patos Lagoon, Rio Grande do Sul, Brazil. Sampling was performed fortnightly at two different estuarine zones, named Leonideo Island and West Breakwater, to detect different growth patterns for this species by using the von Bertalanffy growth model (VBGM). The VBGM estimated were as follows: TLmm = 34.57 (1−e−0.012(t−2.93)) (males in Leonideo Island), TLmm = 35.61(1−e−0.009(t−5.87)) (males in West Breakwater), TLmm = 30.11(1−e−0.009(t−5.84)) (females in Leonideo Island) and TLmm = 29.65(1−e−0.01(t−4.87)). Significant sexual dimorphism was observed, since males reach larger TL (mm) by higher k value (day) and consequently a faster growth pattern. Different growth patterns of males were also detected comparing both populations, in such a way that the West Breakwater individuals are larger than those from the Leonideo Island. One possible explanation is the higher food availability observed in the former site, as well as favourable environmental parameters, providing better conditions for individual growth. Briefly, two different populations of L. exotica were detected in the studied area, presenting discrete growth parameters highly influenced by environmental factors.

scholarly journals Conservation, Restoration, and Sustainable Use of Biodiversity Based on Habitat Quality Monitoring: A Case Study on Jeju Island, South Korea (1989–2019)

Land ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 774
Author(s):  
Hyun-Jung Hong ◽  
Choong-Ki Kim ◽  
Hyun-Woo Lee ◽  
Woo-Kyun Lee
Keyword(s):  
South Korea ◽  
Habitat Quality ◽  
Sustainable Use ◽  
Habitat Type ◽  
Biodiversity Loss ◽  
Well Being ◽  
Jeju Island ◽  
Natural Habitats ◽  
Invest Model ◽  
Aichi Biodiversity Targets

Biodiversity loss is progressing despite biodiversity being essential for human survival, prosperity, and well-being. Conservation, restoration, and sustainable use of the habitat, given that its change is the most prominent factor causing the deterioration of biodiversity, represents a highly effective way of securing biodiversity. Therefore, we assessed and monitored habitat quality as a proxy for biodiversity with habitat quantity in Jeju Island, South Korea. We used an InVEST model with data on the habitat type, suitability, sensitivity, accessibility, and threat factors. Natural habitats throughout Jeju had rapidly decreased in area by 24.9% from 1989 to 2019, and this change contributed to the degradation of habitat quality by 15.8%. We provided significant evidence on the critical degradation of habitat for a long period of over 30 years and highlighted the urgent need for policies and behaviors that enhance biodiversity. We proposed appropriate strategies to prompt people to conserve better, restore effectively, and use biodiversity sustainably. We expect that our findings will provide scientific and evidence-based guidance for policy-making on biodiversity enhancement and will further support achievement of the Sustainable Development Goals and Aichi Biodiversity Targets, in addition to compliance with the New Deal for Nature and People.

PATTERNS OF GROWTH IN HEIGHT AND WEIGHT FROM BIRTH TO EIGHTEEN YEARS OF AGE

PEDIATRICS ◽  
1959 ◽  
Vol 24 (5) ◽  
pp. 904-921
Author(s):  
Robert B. Reed ◽  
Harold C. Stuart
Keyword(s):  
Growth Curves ◽  
Growth Patterns ◽  
Individual Growth ◽  
Growth Spurt ◽  
Adolescent Growth Spurt ◽  
Wide Range ◽  
Basic Facts ◽  
The Individual ◽  
Rates Of Growth ◽  
Mature Size

In this report is displayed the range of variation observed in the growth curves of height and weight in a series of 134 children observed from birth to 18 years. For purposes of simplification the individuals have been classified on the basis of their rates of growth during three successive 6-year intervals. Even in terms of this crude classification several basic facts about individual growth patterns of height and weight are apparent. The wide range of differences between individuals applies not only to facts about size at specific ages but also to the pattern of change followed from age period to age period. The rate of growth during early childhood, i.e. before 6 years of age, is associated with, but not specifically predictive of, size at maturity and timing of the adolescent growth spurt. Individuals with rapid growth before 6 years of age tend to have large mature size and early adolescent growth spurt. It will be the objective of future reports from this research project to determine the manner in which the individual differences in growth demonstrated and classified here are related to aspects of physical development, to environmental influences such as dietary intake and to the level of health of the child.

scholarly journals Pubertal growth in normal Thai children: a longitudinal study

2010 ◽  
Vol 4 (5) ◽  
pp. 793-795
Author(s):  
Suttipong Wacharasindhu ◽  
Vichit Supornsilchai ◽  
Suphab Aroonparkmongkol ◽  
Thaninee Sahakitrungrueng
Keyword(s):  
Longitudinal Study ◽  
Growth Parameters ◽  
Longitudinal Growth ◽  
Compensatory Mechanism ◽  
Growth Data ◽  
Clinical Practices ◽  
Normal Children ◽  
Pubertal Onset ◽  
Pubertal Growth ◽  
Height Gain

Abstract Background: Pubertal growth data in Thai children has been reported as cross-sectional studies. There is no longitudinal study in Thai children. Objective: Investigate the longitudinal growth data in normal Thai children including the relationship between age at pubertal onset and other growth parameters. Material and method: Eighty-eight normal children (44 boys, 44 girls) were longitudinally assessed for the growth and puberty until they reached their final adult height. Pubertal staging was assessed by the Tanner method. Results: Mean age of pubertal onset was 10.2 ± 1.2 years for girls and 12.2 ± 1.0 years for boys. Total pubertal height gain was 18.3 ± 4.0 cm for girls and 22.3 ± 4.4 cm for boys. Total pubertal height gain had a negative correlation with age at pubertal onset for girls, but not for boys. Conclusion: The onset of puberty was not much changed from previous studies. Girls with early puberty had a higher pubertal height gain. This might be due to a compensatory mechanism. These longitudinal growth data can be used as a reference in clinical practices for Thai children.

scholarly journals Radar-based Bayesian estimation of ice crystal growth parameters within a microphysical model

2020 ◽  
Author(s):  
Robert S. Schrom ◽  
Marcus van Lier-Walqui ◽  
Matthew R. Kumjian ◽  
Jerry Y. Harrington ◽  
Anders A. Jensen ◽  
...  
Keyword(s):  
Vapor Deposition ◽  
Growth Parameters ◽  
Particle Density ◽  
Optimal Parameter ◽  
Number Concentration ◽  
Department Of Energy ◽  
The Arctic ◽  
Model Parameters ◽  
Growth Ratio ◽  
Radar Measurements

AbstractThe potential for polarimetric Doppler radar measurements to improve predictions of ice microphysical processes within an idealized model-observational framework is examined. In an effort to more rigorously constrain ice growth processes (e.g., vapor deposition) with observations of natural clouds, a novel framework is developed to compare simulated and observed radar measurements, coupling a bulk adaptive-habit model of vapor growth to a polarimetric radar forward model. Bayesian inference on key microphysical model parameters is then used, via a Markov chain Monte Carlo sampler, to estimate the probability distribution of the model parameters. The statistical formalism of this method allows for robust estimates of the optimal parameter values, along with (non-Gaussian) estimates of their uncertainty. To demonstrate this framework, observations from Department of Energy radars in the Arctic during a case of pristine ice precipitation are used to constrain vapor deposition parameters in the adaptive habit model. The resulting parameter probability distributions provide physically plausible changes in ice particle density and aspect ratio during growth. A lack of direct constraint on the number concentration produces a range of possible mean particle sizes, with the mean size inversely correlated to number concentration. Consistency is found between the estimated inherent growth ratio and independent laboratory measurements, increasing confidence in the parameter PDFs and demonstrating the effectiveness of the radar measurements in constraining the parameters. The combined Doppler and polarimetric observations produce the highest-confidence estimates of the parameter PDFs, with the Doppler measurements providing a stronger constraint for this case.

scholarly journals Clustering Individual Growth Patterns in an Even-Aged Forest Stand

FORMATH ◽  
2005 ◽  
Vol 4 (0) ◽  
pp. 49-69
Author(s):  
H. Yanagihara ◽  
A. Yoshimoto
Keyword(s):  
Forest Stand ◽  
Growth Patterns ◽  
Individual Growth

scholarly journals Transcripts repressed at the stop of phloem unloading highlight the energy efficiency of sugar import in the ripening V. vinifera fruit.

2021 ◽  
Author(s):  
Stefania Savoi ◽  
Laurent Torregrosa ◽  
Charles Romieu
Keyword(s):  
Cell Wall ◽  
Regulatory Elements ◽  
Solute Concentration ◽  
Growth Patterns ◽  
Individual Growth ◽  
Sugar Accumulation ◽  
Minor Role ◽  
Phloem Unloading ◽  
Sugar Transporters ◽  
A Minor

AbstractTranscriptomic changes at the cessation of sugar accumulation in the pericarp of Vitis vinifera were addressed on single berries re-synchronized according to their individual growth patterns. The net rates of water, sugars and K+ accumulation inferred from individual growth and solute concentration confirmed that these inflows stopped simultaneously in the ripe berry, while the small amount of malic acid remaining at this stage was still being oxidized at a low rate. Resynchronized individual berries displayed negligible variations in gene expression among triplicates. RNA-Seq studies revealed sharp reprogramming of cell wall enzymes and structural proteins, associated with an 80% repression of specific sugar transporters and aquaporins on the plasma or tonoplast membranes, at the stop of phloem unloading in the three genotypes and two environments investigated. The prevalence of SWEET transporters suggests that electrogenic transporters would just play a minor role on the plasma membrane of SE/CC complex, and the one of the flesh, while sucrose/H+ exchangers dominate on its tonoplast. Cis-regulatory elements present in their promoters allowed to sort these transporters in different groups, also including specific TIPs and PIPs paralogs, and cohorts of cell wall related genes. These results lead us to propose which structural, developmental and energy adaptations would give this fruit such a power of attraction for water and photoassimilates.

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