Relevant bibliographies by topics / Densité larvaire

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Densité larvaire'

Author: Grafiati
Published: 4 June 2021
Last updated: 9 February 2022

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Journal articles on the topic "Densité larvaire"

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Iro, Souleymane Mahamane, Yaro Alpha Seydou, and Ali Doumma. "Mesures des indicateurs de prolifération des larves de moustiques au niveau des mares permanentes et semi permanentes de Saga, Niger." International Journal of Biological and Chemical Sciences 14, no. 4 (2020): 1188–202. http://dx.doi.org/10.4314/ijbcs.v14i4.3.

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Les Culicidae, communément appelés moustiques, par leur large distribution et leur abondance, sont impliqués dans la transmission de nombreuses maladies humaines et animales. La lutte contre ces insectes nécessite la connaissance de leurs lieux de développement dans lequel évoluent les stades pré imaginaux. La présente étude vise à caractériser ces gîtes larvaires en vue d’identifier les indicateurs entomologiques et écologiques de production de larves dans ces milieux. Pour ce faire, le pH, la température, la conductivité, la teneur en oxygène dissout et la densité larvaire des culicidae ont
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Dianti, Isye, Budiyono Budiyono, and Tri Joko. "Nutrition Factors in Breeding Place Media and Larva Density of Aedes Aegypti." Journal of Public Health for Tropical and Coastal Region 2, no. 2 (2019): 33–39. http://dx.doi.org/10.14710/jphtcr.v2i2.6188.

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Background: One of the stages of development to the growth of the Aedes aegypti is larvae stage. The larvae need nutrients to grow. A one of medium for breeding larvae is water in the container. Some of the important nutrients for growth are nitrate, phosphate, ammonia. This study aimed to analyze the relationship between nutrient levels in the water of the container density of Aedes aegypti larvae. Methods: Observational study with a cross-sectional with 119 houses as samples. Results:Test the relationship of nutritional factors with the density of Aedes aegypti larvae using the Pearson corre
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Motta, Jonas H. S., Leonardo S. Glória, Marcelo F. Polese, André B. De Souza, Manoel A. C. Neto, and Manuel V. Vidal Júnior. "Stocking density influences common carp larval development. Can restocking processes activate compensatory growth consequent to previous high stocking density?" Spanish Journal of Agricultural Research 18, no. 3 (2020): e0608. http://dx.doi.org/10.5424/sjar/2020183-15652.

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Aim of study: to analyse the effect of stocking density on common carp larvae production. Since stocking density is one of the most important variables in recirculating aquaculture system, it is fundamental to understand its implication on fish larval development. Area of study: BrazilMaterial and methods: In an initial trial over a 30-day period, 18,000 Cyprinus carpio larvae were subjected to eight different stocking densities (5, 10, 15, 20, 25, 30, 35 and 40 larvae/L). In a second trial over a 15-day period, the larvae subjected to the 40 larvae/L treatment were selected according to size
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Cardoso-Leite, Ricardo, Gabriel C. Vilardi, Rhainer Guillermo-Ferreira, and Pitágoras C. Bispo. "The Effect of Conspecific Density on Emergence ofLestes bipupillatusCalvert, 1909 (Odonata: Lestidae)." Psyche: A Journal of Entomology 2014 (2014): 1–3. http://dx.doi.org/10.1155/2014/650427.

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Conspecific density may influence adult recruitment and consequently population dynamics. Several studies have shown the density dependence of larvae growth rates in Odonata. However, few studies studied how conspecific density influence final instar larvae emergence date decisions. Considering that larvae may choose the date of emergence, the present study investigated if density affects larvae choice. For this, we reared eight final instar larvae in individual aquaria and other 24 larvae in aquaria with three larvae each. This way, we simulated environments with low and high larval densities
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Yamasaki Granados, Stig, Marcelo Garcia Guerrero, Fernando Vega Villasante, Francisco Castellanos Leon, Ronaldo O. Cavalli, and Edilmar Cortes Jacinto. "Experimental culture of the river prawn Macrobrachium americanum larvae (Bate, 1868), with emphasis on feeding and stocking density effect on survival." Latin American Journal of Aquatic Research 41, no. 4 (2013): 793–800. http://dx.doi.org/10.3856/vol41-issue4-fulltext-16.

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Mariana, Santi, I. Wayan Susila, Ketut Ayu Yuliadhi, and I. Wayan Supartha. "The response of sycanus aurantiacus ishikawa et okajima (hemiptera: reduviidae) to color polymorphisms larvae of spodoptera exigua (hubner) (lepidoptera: noctuidae)." International journal of life sciences 4, no. 2 (2020): 42–51. http://dx.doi.org/10.29332/ijls.v4n2.438.

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his study aims to evaluate the predatory behavior, preference and functional response of S. aurantiacus in color polymorphism larvae of S. exigua. The predatory behavior and preference test of S. aurantiacus using green and dark brown color larvae of S. exigua. Functional response test was carried out with 5 treatments of larvae population density with 10 replications. The results showed that S. aurantiacus prefers to dark brown larvae of S. exigua than green. The time taken by predators to find the first and subsequent prey was faster in dark brown larvae than in green, both on low or high la
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Castelo Branco, Marina, and Alexander G. Gatehouse. "Food availability and larval density affect ovarian development in Plutella xylostella (L.) (Lepidoptera: Yponomeutidae)." Anais da Sociedade Entomológica do Brasil 28, no. 4 (1999): 611–16. http://dx.doi.org/10.1590/s0301-80591999000400004.

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The effect of Diamondback Moth (Plutella xylostella L.) population density and plant age on the rate of ovarian development was investigated. In tests carried out in Petri dishes, the density of larvae/leaf disk affected the rate of ovarian development. A high proportion of moths from larvae reared on leak disks from two or four-month-old spring cabbage at a density of seven or 14 larvae/leaf disk were mature at emergence. But moths reared at the same type of plant at a density of 28 larvae/leaf disk were largely immature at emergence. When the larvae were reared at a density of 30 larvae/plan
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Kong, Hailong, Chuanlei Dong, Wanghui Jing та ін. "The Role of Tyramine β-Hydroxylase in Density Dependent Immunityof Oriental Armyworm (Mythmina separata) Larva". International Journal of Molecular Sciences 20, № 7 (2019): 1553. http://dx.doi.org/10.3390/ijms20071553.

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High population density alters insect prophylactic immunity, with density-dependent prophylaxis (DDP) being reported in many polyphonic insects. However, the molecular mechanism for DDP remains unclear. In current study, the role of tyramine β-hydroxylase (Tβh) in the immune response of M. separata larvae that were subject to different rearing densities conditions was investigated. The tyramine β-hydroxylase activity of larvae from high density treatments (10 and 30 larvae per jar) was significantly higher than that of the larvae from low density treatments (one, two, and five larvae/jar). A t
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Sunarti, Sunarti, Muhammad Ali, and Mudatsir Mudatsir. "Kepadatan Fitoplankton dan Larva Nyamuk Aedes albopictus pada Tempat Perindukan di Kecamatan Syiah Kuala Kota Banda Aceh." BIOTIK: Jurnal Ilmiah Biologi Teknologi dan Kependidikan 6, no. 2 (2019): 125. http://dx.doi.org/10.22373/biotik.v6i2.5634.

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This study was conducted to determine the density index of phytoplankton and Aedes albopictus larvae found in breeding sites. The object of research was phytoplankton and Aedes albopictus larvae taken at Syiah Kuala District, Banda Aceh. Data was collected in December 2014 and January 2015. This study used a descriptive exploratory design. The research parameters are the type and density of phytoplankton found in various breeding places found at the study site. Data on the density of Aedes albopictus larvae was analyzed using the House and Container Index, and Density Index. This study found 1
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Prastiani, Ika, and Corie Indria Prasasti. "Relationship between Temperature, Density Residential, Knowledge, Attitude with Density of Larvae in Sub District Gunung Anyar, Surabaya." JURNAL KESEHATAN LINGKUNGAN 9, no. 1 (2018): 1. http://dx.doi.org/10.20473/jkl.v9i1.2017.1-10.

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Dengue Hemorrhagic Fever (DHF) is a disease caused by dengue virus and transmitted by mosquito Aedes. Surabaya is one of the districts in East Java Province which includes dengue endemic areas, particularly in Sub district Gunung Anyar. The purpose of this study was analyze relationship between temperature, density residential, knowledge and attitude about the incidence and the intervention of dengue with the density of larvae Aedes aegypti in Sub district Gunung Anyar, Surabaya. This study was an observational study with cross sectional study design that used primary data like observation, in
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Dissertations / Theses on the topic "Densité larvaire"

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Henry, Youn. "Influence des facteurs alimentaires et du microbiote intestinal sur la tolérance au stress chez Drosophila melanogaster." Thesis, Rennes 1, 2018. http://www.theses.fr/2018REN1B043/document.

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Un grand nombre de paramètres environnementaux affectent les insectes, et l’identification des éléments impliqués dans l’adaptation aux stress est cruciale. La nutrition est une clé de cette adaptation : elle contrôle la santé des organismes, et par conséquent affecte leur tolérance au stress. Le microbiote intestinal module lui aussi les processus physiologiques des organismes, notamment en agissant sur le phénotype nutritionnel de l’hôte. Cependant, nous ignorons encore la capacité de ce microbiote à modifier la tolérance au stress de l’hôte. A travers la manipulation du microbiote et de la
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Belzile, Claude. "Effets de la densité et de la température sur le développement larvaire et la taille adulte de Aedes triseriatus (diptera - culicidae)." Thèse, Université du Québec à Trois-Rivières, 1991. http://depot-e.uqtr.ca/5384/1/000587541.pdf.

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Ronzani, Cerqueira Vinicius. "L' élevage larvaire intensif du loup Dicentrarchus labrax : inflence de la lumière, de la densité en proies et de la température sur l'alimentation, sur le transit digestif et sur les performances zootechniques." Université d'Aix-Marseille II. Faculté des sciences (1969-2011), 1986. http://www.theses.fr/1986AIX22031.

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Taggart, Christopher Thomas. "Mortality of larval capelin (Mallotus villosus Muller) : environmental and density correlates during post-emergent dispersal." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=72771.

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Kallmeyer, Diane E. "Density dynamics of zebra mussel (Dreissena polymorpha) larvae in a study zone of the Indiana waters of Lake Mighigan from May through August of 1990-1997." Virtual Press, 1999. http://liblink.bsu.edu/uhtbin/catkey/1137832.

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Rodgers, Brandon. "Poecilia reticulata predation on Aedes aegypti larvae : effects of predator body size and vegetation density." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=100206.

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In this study, predation efficiency of three guppy ( Poecilia reticulata) size classes was evaluated at various vegetation densities in a series of circular aquaria containing plastic plants closely resembling Ceratophyllum demersum. The effect of vegetation density was most apparent among large fish where predation efficiency greatly diminished from 12.35 mosquito larvae (Aedes aegypti) to 4.68 as vegetation densities rose from 3 to 19 plants/700 cm2. Over that same range of increasing vegetation densities, predation among small fish remained unchanged, whereas among fish of intermediate size
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Cerqueira, Vinicius Ronzani. "L'elevage larvaire intensif du loup, dicentrarchus labrax : influence de la lumiere, de la densite en proies et de la temperature sur l'alimentation, sur le transit digestif et sur les performances zootechniques." reponame:Repositório Institucional da UFSC, 1986. http://repositorio.ufsc.br/xmlui/handle/123456789/75332.

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Ronzani, Cerqueira Vinicius. "L'Elevage larvaire intensif du loup, Dicentrarchus labrax influence de la lumière, de la densité en proies et de la température sur l'alimentation, sur le transit digestif et sur les performances zootechniques /." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37600767k.

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Wisniewski, Gabriela L. "Occurrence, Density, and Distribution of the Larvae of Three Commercially Important Crab Species in the Florida Current off the Southeast Coast of Florida, U.S." NSUWorks, 2010. http://nsuworks.nova.edu/occ_stuetd/195.

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Knowledge of the temporal and spatial distribution and density of the larvae of Florida‘s commercially important crab species, the blue crab, Callinectes sapidus, the golden crab, Chaceon fenneri, and the stone crab, Menippe mercenaria in the nearshore and offshore waters of Florida‘s southeast coast is minimal. Such data, however, can be crucial to our understanding of the population dynamics of these vital fishery species. To obtain baseline data of the occurrence and distribution of these species‘ larvae in the Florida Current, densities were obtained from zooplankton tows from an E-W trans
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Abd-Eldayem, Mohamed Sabry Abd-Elaziz. "A study of the quantitative relationship between the blood density of Wuchereria bancrofti microfilariae and development of infective larvae in Culex pipens molestus in Egypt." Thesis, University of London, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.247427.

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Books on the topic "Densité larvaire"

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Mansfield, Toby. Larval density and adult mosquito movement in a tire dump habitat: A thesis in biology. 1988.

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Pernet, Bruno, ed. Larval Feeding: Mechanisms, Rates, and Performance in Nature. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198786962.003.0007.

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Larvae of many marine invertebrates must capture and ingest particulate food in order to develop to metamorphosis. These larvae use only a few physical processes to capture particles, but implement these processes using diverse morphologies and behaviors. Detailed understanding of larval feeding mechanism permits investigators to make predictions about feeding performance, including the size spectrum of particles larvae can capture and the rates at which they can capture them. In nature, larvae are immersed in complex mixtures of edible particles of varying size, density, flavor, and nutrition
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Miller, Thomas E., William E. Bradshaw, and Christina M. Holzapfel. Pitcher-plant communities as model systems for addressing fundamental questions in ecology and evolution. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198779841.003.0024.

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Carnivorous plants have close associations with other species that live in or on the plant. Sarracenia purpurea has a particularly large number of inquiline species, many of which are obligates that live in its water-filled leaves. These include a well-studied food web of bacteria, protozoa, rotifers, mites, and Diptera larvae, all of which depend on the prey of the host plant. This model system has been used to address fundamental questions in ecology and evolution, including studies of keystone predation, succession, consumer versus resource control, invasion, dispersal, and the roles of res
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Book chapters on the topic "Densité larvaire"

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"Early Life History of Fishes in the San Francisco Estuary and Watershed." In Early Life History of Fishes in the San Francisco Estuary and Watershed, edited by Bradd Baskerville-Bridges, Joan C. Lindberg, and Serge I. Doroshov. American Fisheries Society, 2004. http://dx.doi.org/10.47886/9781888569599.ch14.

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<em>Abstract.</em>—Understanding how environmental factors influence first feeding success is critical for the conservation-oriented larval culture of delta smelt <em>Hypomesus transpacificus</em>, a threatened osmerid endemic to the San Francisco Estuary. We investigated the effects of light intensity, alga concentration, and prey (rotifer) density on feeding of cultured delta smelt larvae. In one experiment, first feeding larvae were exposed to three light intensities (0.01, 0.3, and 1.9 μmoles <sup>. </sup>s<sup>–1. </sup>m<sup>–2</sup>) and three alga concentrations (0, 0.5, and 2 × 10<sup>6 </sup>cells/mL). Intestinal contents were examined to determine the incidence of feeding and gut fillness. Maximum feeding responses (92% feeding; 4.8 rotifers/feeding larva in 2 h) were observed at the highest light intensity and alga concentrations; feeding sharply declined with a reduction of either factor. A second experiment was performed to study the effect of alga concentration (0, 1.5, 3, and 6 × 10<sup>6 </sup>cells/mL) in more detail. Feeding responses were very low without algae (13% feeding; 2.1 rotifers/feeding larva in 2 h), but dramatically increased at high concentrations (83% feeding; 5.1 rotifers/feeding larvae in 2 h). In a third experiment, the effect of prey (rotifer) density (0.1, 1, 10, and 100 rotifers/mL) was tested, which significantly enhanced feeding up to the 10/mL treatment (84% feeding; 4.2 rotifers/feeding larvae in 1 h). All three environmental factors significantly affected feeding success of larval delta smelt. Optimization of these factors has improved survival and growth during the sensitive larval period and has improved laboratory culture of delta smelt.
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"Biology, Management, and Conservation of Lampreys in North America." In Biology, Management, and Conservation of Lampreys in North America, edited by David A. Close, Kenneth P. Currens, Aaron Jackson, et al. American Fisheries Society, 2009. http://dx.doi.org/10.47886/9781934874134.ch14.

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<em>Abstract</em>.—Between 1999 and 2007, more than 2,600 adult Pacific lampreys <em>Entosphenus tridentatus </em>(formerly <em>Lampetra tridentata</em>) were reintroduced to the Umatilla River, where they had been extirpated by poisoning, from nearby locations in the Columbia River consistent with the International Union for Conservation of Nature and Natural Resources guidelines. Reintroduced adult Pacific lampreys were able to find suitable spawning habitat, construct nests, and deposit viable eggs (81–93% mean egg viability per nest). Their larvae were able to feed and grow. Median lengths for age 0+, 1+, and 2+ larvae were 19, 63, and 109 mm, respectively. Mean density of larvae in survey plots increased over time from 0.08 to 6.56 larvae/m<sup>2</sup>. Geographical distribution of larvae in the river increased downstream, but larvae failed to become established in the lower Umatilla River where water flows were regulated for irrigation. Annual abundances of trapped, recently metamorphosed, out-migrating larvae increased during the study from nearly zero to 180,000, but not in all years, which suggests that many might not be surviving migration to the Columbia River, possibly because of irrigation withdrawals. Abundances of trapped, returning adult lamprey also increased from 2003 to 2006, which corresponded with the period when adult lampreys that were the progeny of reintroduced lampreys were expected to return, but long-term monitoring is necessary to confirm that increases were the result of the reintroduction. Our results also demonstrated that even if presumptive causes of extirpation were known and removed before reintroduction, success is not guaranteed. Reintroduction not only assists in redistributing animals to parts of their historical range, but in conjunction with monitoring, it may be essential to identify additional limiting factors that were unknown at reintroduction.
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"Early Life History of Fishes in the San Francisco Estuary and Watershed." In Early Life History of Fishes in the San Francisco Estuary and Watershed, edited by Stephen F. Foss and Lee W. Miller. American Fisheries Society, 2004. http://dx.doi.org/10.47886/9781888569599.ch13.

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<em>Abstract.</em>—We investigated factors affecting growth of larval striped bass <em>Morone saxatilis </em>in the San Francisco Estuary from 1984 to 1993. We estimated ages and growth rates of larval striped bass from daily otolith increments. Mean annual growth rates of 6–14 mm standard length striped bass varied from 0.13 to 0.27mm/d, the lowest rate occurring in 1989 and the highest in 1992. The 1989 growth rate was significantly lower than all other years, and growth rates for 1992 and 1993 were significantly higher than all other years, but did not differ from one another. Differences in annual growth rates apparently were due mainly to differences in mean annual prey densities because growth rate increased as prey density increased. Compared to both laboratory measured growth rates and growth rates of field-caught Chesapeake Bay larvae, growth rates from the San Francisco Estuary appeared to be high for the food available, indicating that larvae can grow at relatively high rates even at low prey densities. Correlation analyses did not support density-dependent control of growth rates. Growth rate was not significantly related to mean annual conductivity, water temperature, mortality rates, or the juvenile abundance index, but was significantly and positively correlated with densities of 1-mm length-groups of 9–14-mm striped bass.
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"Hudson River Fishes and their Environment." In Hudson River Fishes and their Environment, edited by Ronald C. Tipton and Kyle J. Hartman. American Fisheries Society, 2006. http://dx.doi.org/10.47886/9781888569827.ch13.

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<em>Abstract.–</em>Bay anchovy are the most abundant fish found along the U.S. Atlantic coast. This coupled with trophic position and importance to piscivores makes them ecologically vital. However, the anchovy’s small size renders them vulnerable to impingement and entrainment at industrial water intakes. Therefore, knowledge of anchovy spatial distributions relative to such intakes is critical to understanding anthropogenic effects on this species. To evaluate the distributional ecology of bay anchovy in the Hudson River Estuary we conducted seasonal hydroacoustic surveys to define regional density and total abundance of larval, juvenile, and adult anchovy in the river from 1996–1998. Adults concentrated in the lower river during prespawning periods, utilizing the lower 50 km during spawning. Adults dispersed within the river and then emigrated during fall and winter. Larvae and juveniles were in highest densities upriver of spawning locations, with a downriver shift in density distribution during fall. Few juveniles overwintered in the river. Abundance of all stages peaked in spawning season, 1997, when abundance of adults, juveniles, and larvae were estimated at 150 million, 3 billion, and 5.5 billion individuals, respectively. Distributional patterns suggest a panmictic population that includes the Hudson River Estuary and nearby coastal areas, but with possible age segregation. These findings suggest population impacts to anchovy within the River may be distributed on a more regional than a local scale.
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"Hudson River Fishes and their Environment." In Hudson River Fishes and their Environment, edited by Ronald C. Tipton and Kyle J. Hartman. American Fisheries Society, 2006. http://dx.doi.org/10.47886/9781888569827.ch13.

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<em>Abstract.–</em>Bay anchovy are the most abundant fish found along the U.S. Atlantic coast. This coupled with trophic position and importance to piscivores makes them ecologically vital. However, the anchovy’s small size renders them vulnerable to impingement and entrainment at industrial water intakes. Therefore, knowledge of anchovy spatial distributions relative to such intakes is critical to understanding anthropogenic effects on this species. To evaluate the distributional ecology of bay anchovy in the Hudson River Estuary we conducted seasonal hydroacoustic surveys to define regional density and total abundance of larval, juvenile, and adult anchovy in the river from 1996–1998. Adults concentrated in the lower river during prespawning periods, utilizing the lower 50 km during spawning. Adults dispersed within the river and then emigrated during fall and winter. Larvae and juveniles were in highest densities upriver of spawning locations, with a downriver shift in density distribution during fall. Few juveniles overwintered in the river. Abundance of all stages peaked in spawning season, 1997, when abundance of adults, juveniles, and larvae were estimated at 150 million, 3 billion, and 5.5 billion individuals, respectively. Distributional patterns suggest a panmictic population that includes the Hudson River Estuary and nearby coastal areas, but with possible age segregation. These findings suggest population impacts to anchovy within the River may be distributed on a more regional than a local scale.
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Dennenmoser, Stefan, John H. Christy, and Martin Thiel. "Rhythms and Reproduction." In Reproductive Biology. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190688554.003.0017.

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Reproductive rhythms can be found in numerous crustacean species. This chapter reviews the temporal scales of rhythms and how these rhythms are entrained and maintained by external cues and endogenous clocks. The occurrence and synchrony of rhythms vary along latitudinal and depth gradients, which may depend on the availability of zeitgebers (e.g., temperature and photoperiod), changing selective pressures such as predation risk, and variability in larval development rates that affect the timing and synchrony of reproductive rhythms. Commonly observed rhythms are reproductive migrations and synchronized larval release, which are often timed to reduce predation risk for newly hatched larvae. In crustaceans, reproductive rhythms rarely evolve under pure density-dependent selection for synchrony. Pure density dependence is common in marine broadcast-spawning invertebrates like corals, which rely on accumulation of gametes in time and space to ensure fertilization. Instead, (density-independent) selection for synchrony with environmental cycles that track changes in factors affecting fitness such as energy expenditure, predation risk, or food availability seems to be the rule, although some exceptions may exist. In contrast to natural selection, the possible contribution of sexual selection on reproductive rhythms has rarely been considered. Selection for enhanced mating possibilities should favor reproductive synchrony, but deviations from synchrony will affect the operational sex ratio and influence sexual selection. Finally, the chapter discusses the possibility of sexual conflict over reproductive timing between males and females and explores circumstances under which synchronous reproductive rhythms might be abandoned.
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"Early Life History of Fishes in the San Francisco Estuary and Watershed." In Early Life History of Fishes in the San Francisco Estuary and Watershed, edited by Stephen M. Bollens and Alison M. Sanders. American Fisheries Society, 2004. http://dx.doi.org/10.47886/9781888569599.ch2.

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<em>Abstract.</em>—Pacific herring <em>Clupea pallasi </em>is a commercially and ecologically important fish with a sizable stock that spawns and spends its early life history in the San Francisco Estuary (SFE). Yet very little is known about the basic ecology of larval Pacific herring in the SFE. We undertook a 3-year field study (1999–2002), focused on winter and spring collections in two regions of the SFE (the Central and San Pablo bays), to address three objectives: (1) determine seasonal abundance patterns of larval Pacific herring in the two bays, (2) examine the diet of larval Pacific herring, and (3) evaluate the condition of larval Pacific herring in the two bays. Pacific herring were a conspicuous component of the winter larval fish assemblage in both the San Pablo and Central bays, comprising a maximum of 22.5% and 5.5% of total abundance, respectively. Larval Pacific herring abundance peaked in February or March of each year, reaching a maximum density of 2.53/m<sup>3 </sup>(San Pablo) and 0.52/m<sup>3 </sup>(Central Bay). Length frequency distributions suggested that at least 2–3 cohorts were produced each year, with some evidence that larvae were slightly larger in San Pablo Bay. Larval Pacific herring fed on a broad range of prey types, including tintinnids, copepodids, copepod nauplii, diatoms, and gastropod veligers. The unusually high proportion of tintinnids in the diet (87% by number in March 2001) suggests an important protozoan–metazoan linkage. Condition of larvae was assessed by analyses of covariance of a “growth sensitive” variable (i.e., body weight, anal body depth, or pectoral body depth) regressed against a “growth insensitive” variable (i.e., standard length). These results showed marked differences between the bays: in Central Bay, early (small) larvae exhibited better condition, but within San Pablo Bay, larvae exhibited a greater rate of improved condition with increasing age (size). This suggests the possibility of important differences in the Central and San Pablo bays as larval Pacific herring nursery grounds. Several areas of future research on the ecology of larval Pacific herring in SFE are recommended (e.g., coupling between horizontal and vertical distributions and advective flow fields, predation, and feeding dynamics on protozoan versus metazoan prey).
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"Fish Habitat: Essential Fish Habitat and Rehabilitation." In Fish Habitat: Essential Fish Habitat and Rehabilitation, edited by David B. Packer and Tom Hoff. American Fisheries Society, 1999. http://dx.doi.org/10.47886/9781888569124.ch8.

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<em>Abstract.</em> —To satisfy the essential fish habitat (EFH) mandate of the reauthorized Magnuson-Stevens Fishery Conservation and Management Act, the Mid-Atlantic Fishery Management Council (MAFMC) and the National Marine Fisheries Service (NMFS) are developing objective, generic criteria to describe and identify the essential habitats for their managed species. Summer flounder or fluke <em>Paralichthys dentatus </em> is an important commercial and recreational species that occurs from shallow estuaries to the outer continental shelf from Nova Scotia to Florida. It is most abundant within the Middle Atlantic Bight from New England to Cape Hatteras, and this region is the focus of this paper. Summer flounder make seasonal inshore–offshore migrations; adults and juveniles normally inhabit shallow coastal and estuarine waters during the warmer months of the year and mostly move offshore with declining water temperature and day length during autumn. Adults spawn during the fall and winter migrations. The best habitat information available on summer flounder is for the estuarinedependent transforming larvae and juveniles. They use several different estuarine habitats as nursery areas, including salt-marsh creeks, sea grass beds, mudflats, and open bay areas. In these habitats, water temperature affects the seasonal occurrence of summer flounder, drives the inshore–offshore migration, and, particularly during winter and spring, affects first-year growth and survival and thus subsequent year-class strength. The distribution of transforming larvae and juveniles within the estuaries is significantly influenced by salinity gradients and substrate. Transforming larvae and juveniles show a preference for sandy substrates in the laboratory but also have been captured on mud or mixed substrates. Juveniles are attracted to eelgrass and macroalgae habitats because of the presence of prey but remain in nearby sand to avoid predators as well as conceal themselves from the prey. The MAFMC used the life history and habitat parameter information developed by the NMFS Northeast Fisheries Science Center (NEFSC) to precisely describe the EFH of summer flounder by life stage. Because summer flounder are overexploited, the MAFMC wanted to be conservative in its EFH identification. Therefore, 90% of the areas where each life history stage has been collected from offshore surveys were identified as EFH. The MAFMC proposed that 100% of the estuaries where larvae and juveniles were identified as being present be identified as EFH because these life stages are estuarine dependent. Nursery habitats within the estuaries are essential because they provide the best conditions for growth and survival of the transforming larvae and juveniles. Submerged aquatic vegetation beds are especially vulnerable and were identified as habitat areas of particular concern. As more habitatrelated density data become available from various local, state, and federal fishery-independent surveys, updated maps of distribution and abundance will be produced.
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9

"Fish Habitat: Essential Fish Habitat and Rehabilitation." In Fish Habitat: Essential Fish Habitat and Rehabilitation, edited by David B. Packer and Tom Hoff. American Fisheries Society, 1999. http://dx.doi.org/10.47886/9781888569124.ch8.

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Abstract:
<em>Abstract.</em> —To satisfy the essential fish habitat (EFH) mandate of the reauthorized Magnuson-Stevens Fishery Conservation and Management Act, the Mid-Atlantic Fishery Management Council (MAFMC) and the National Marine Fisheries Service (NMFS) are developing objective, generic criteria to describe and identify the essential habitats for their managed species. Summer flounder or fluke <em>Paralichthys dentatus </em> is an important commercial and recreational species that occurs from shallow estuaries to the outer continental shelf from Nova Scotia to Florida. It is most abundant within the Middle Atlantic Bight from New England to Cape Hatteras, and this region is the focus of this paper. Summer flounder make seasonal inshore–offshore migrations; adults and juveniles normally inhabit shallow coastal and estuarine waters during the warmer months of the year and mostly move offshore with declining water temperature and day length during autumn. Adults spawn during the fall and winter migrations. The best habitat information available on summer flounder is for the estuarinedependent transforming larvae and juveniles. They use several different estuarine habitats as nursery areas, including salt-marsh creeks, sea grass beds, mudflats, and open bay areas. In these habitats, water temperature affects the seasonal occurrence of summer flounder, drives the inshore–offshore migration, and, particularly during winter and spring, affects first-year growth and survival and thus subsequent year-class strength. The distribution of transforming larvae and juveniles within the estuaries is significantly influenced by salinity gradients and substrate. Transforming larvae and juveniles show a preference for sandy substrates in the laboratory but also have been captured on mud or mixed substrates. Juveniles are attracted to eelgrass and macroalgae habitats because of the presence of prey but remain in nearby sand to avoid predators as well as conceal themselves from the prey. The MAFMC used the life history and habitat parameter information developed by the NMFS Northeast Fisheries Science Center (NEFSC) to precisely describe the EFH of summer flounder by life stage. Because summer flounder are overexploited, the MAFMC wanted to be conservative in its EFH identification. Therefore, 90% of the areas where each life history stage has been collected from offshore surveys were identified as EFH. The MAFMC proposed that 100% of the estuaries where larvae and juveniles were identified as being present be identified as EFH because these life stages are estuarine dependent. Nursery habitats within the estuaries are essential because they provide the best conditions for growth and survival of the transforming larvae and juveniles. Submerged aquatic vegetation beds are especially vulnerable and were identified as habitat areas of particular concern. As more habitatrelated density data become available from various local, state, and federal fishery-independent surveys, updated maps of distribution and abundance will be produced.
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10

"Hudson River Fishes and their Environment." In Hudson River Fishes and their Environment, edited by Dennis J. Dunning, Quentin E. Ross, Alan F. Blumberg, and Douglas G. Heimbuch. American Fisheries Society, 2006. http://dx.doi.org/10.47886/9781888569827.ch15.

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<em>Abstract.</em>—Our objectives were to determine if striped bass <em>Morone saxatilis </em>larvae were present in the East River and if so, could they have come from the Hudson River. To meet the first objective, we examined entrainment data collected at the Charles Poletti Power Plant (Poletti) during the years 1999 through 2002. To meet the second objective, we examined the simulated release of 168,000 neutrally buoyant, passive particles in the lower Hudson River Estuary, using a particle-tracking model that was linked to an estuarine circulation model. We also compared the abundance of striped bass post-yolk-sac larvae (PYSL) collected in the East River at Poletti with the abundance of striped bass PYSL collected in the Battery region of the lower Hudson River Estuary and the abundance of striped bass PYSL in the Battery region with freshwater flow in the estuary. Striped bass PYSL were collected by entrainment sampling in the East River at Poletti every year from 1999 through 2002. The striped bass PYSL in the East River probably came from the Hudson River Estuary because the median probability that neutrally buoyant, passive particles would be transported from the lower Hudson River Estuary to the upper East River and western Long Island Sound was 0.12, with a median transport time of 2 d, and because the mean density of striped bass PYSL was highest at Poletti and in the Battery region during the same year. The abundance of striped bass PYSL in the Battery region was higher when freshwater flow during May and early June was higher.
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Conference papers on the topic "Densité larvaire"

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Al-Jubouri, Qussay, Waleed Al-Nuaimy, Majid A. Al-Taee, Javier L. Luna, and Lynne U. Sneddon. "Occurrence density index for behavior classification of zebrafish larvae." In 2016 13th International Multi-Conference on Systems, Signals & Devices (SSD). IEEE, 2016. http://dx.doi.org/10.1109/ssd.2016.7473764.

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2

Takahashi, Satoru, Satoru Takahashi, Masami Hamaguchi, and Masami Hamaguchi. "SEASONAL VARIATION OF TRANSPORTATION OF ASARI CLAM, RUDITAPES PHILIPPINARUM, LARVAE IN HIROSHIMA BAY." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.21610/conferencearticle_58b4315cbb321.

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Hiroshima Bay is located in western part of the Seto Inland Sea, and there is high productivity of Asari clam. However, the landings amount of the clam was rapidly decreased and production areas came to be limited in the northern part (bay head). Here, the clam has the planktonic larval stage. Then, it is important to reveal the transportation process of larvae to clarify the habitat connectivity of the clam. Therefore, in this study, we try to clarify the transportation process of the clam larvae in the Hiroshima Bay by numerical model experiments. As a result of model experiments, in June (r
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Takahashi, Satoru, Satoru Takahashi, Masami Hamaguchi, and Masami Hamaguchi. "SEASONAL VARIATION OF TRANSPORTATION OF ASARI CLAM, RUDITAPES PHILIPPINARUM, LARVAE IN HIROSHIMA BAY." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.31519/conferencearticle_5b1b937f57cd63.62615734.

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Hiroshima Bay is located in western part of the Seto Inland Sea, and there is high productivity of Asari clam. However, the landings amount of the clam was rapidly decreased and production areas came to be limited in the northern part (bay head). Here, the clam has the planktonic larval stage. Then, it is important to reveal the transportation process of larvae to clarify the habitat connectivity of the clam. Therefore, in this study, we try to clarify the transportation process of the clam larvae in the Hiroshima Bay by numerical model experiments. As a result of model experiments, in June (r
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Suryadi, Iwan, and Hasanuddin Ishak. "Spatial distribution and characteristics of Anopheles larvae breeding places and their relation to larval density in Bulukumba." In Proceedings of the 3rd International Conference on Environmental Risks and Public Health, ICER-PH 2018, 26-27, October 2018, Makassar, Indonesia. EAI, 2019. http://dx.doi.org/10.4108/eai.26-10-2018.2288915.

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5

A Siregar, Fazidah, and Destanul Aulia. "The influence of sociocultural, environmental factor and Aedes larvae density on transmission of dengue hemorrhagic fever in North Sumatera Province." In 1st Public Health International Conference (PHICo 2016). Atlantis Press, 2017. http://dx.doi.org/10.2991/phico-16.2017.66.

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