Results 201 to 210 of about 356,943 (246)

Visual discrimination in the freshwater shrimp (Macrobrachium acanthurus)

Behavioral Biology, 1977
Two groups of river shrimp each learned a black—white visual discrimination in a dry Y maze, with access to a water tank given as reinforcement and contingencies of positive reinforcement alone, or positive reinforcement and punishment. A high level of performance (average of 92% correct choices in the last three sessions) was achieved by the use of a ...
Dora F. Ventura, Regina H. Mattel
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Why do shrimps leave the water? Mechanisms and functions of parading behaviour in freshwater shrimps

Journal of Zoology, 2020
AbstractAn understanding of the mechanisms and functions of animal migratory behaviour may provide insights into its evolution. Furthermore, knowledge about migration may be important for conservation of rare species and may help to manage species in a rapidly changing world.
W. Hongjamrassilp, W. Maiphrom, D. T. Blumstein   +2 more
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Specific allergy to Penaeus monodon (seawater shrimp) or Macrobrachium rosenbergii (freshwater shrimp) in shrimp‐allergic children

Clinical & Experimental Allergy, 2008
SummaryBackground Allergy to specific shrimp species has not been studied systematically by oral challenges. A comparison of allergy to different shrimp species, especially seawater or freshwater varieties treatment, would be useful in testing shrimp‐allergic subjects.Objective The aim of the study was to identify cases of specific allergy ...
O, Jirapongsananuruk, C, Sripramong, P, Pacharn, S, Udompunturak, S, Chinratanapisit, S, Piboonpocanun, N, Visitsunthorn, P, Vichyanond   +7 more
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Pigment biogenesis in freshwater shrimp ventral nerve chord chromatophores

Cell and Tissue Research, 1982
The possible biogenesis of two pigment granule types present in the monochromatic, brown chromatosomes enveloping the ventral nerve chord of the freshwater palaemonid shrimps Macrobrachium acanthurus, M. heterochirus and M. olfersii is examined by transmission electron microscopy in thin section and freeze fracture replicas. Prominent, membrane limited
J C, McNamara, A, Sesso
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Calcium movements during pigment aggregation in freshwater shrimp chromatophores

Pigment Cell Research, 2006
SummaryPigment granule migration within crustacean chromatophores provides an excellent model with which to investigate cytoplasmic movements, given the antagonistic, neurosecretory peptide regulation of granule translocation, and the absence of innervation in these large, brightly colored cells. Red pigment‐concentrating hormone (RPCH) induces pigment
Márcia, Ribeiro, John Campbell, McNamara   +1 more
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Microsatellite markers for the freshwater shrimp Paratya australiensis (Atyidae)

Conservation Genetics Resources, 2010
Paratya australiensis is a common freshwater shrimp found in most catchments in south-eastern Australia. Microsatellite loci were isolated from a partial genomic library created using 454 sequencing. Of the 25 tested, 13 were found to be polymorphic, however, for pooling purposes only 12 were used for genotyping.
Douglas J. Green, Laurence J. Clarke, Duncan A. Mackay, Molly A. Whalen   +3 more
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Ionic Regulation in Estuarine and Freshwater Palaemonid Shrimp

Journal of Experimental Zoology Part A: Ecological and Integrative Physiology
ABSTRACT Hyper‐regulation requires animals to absorb ions against concentration gradients. Although ion absorption would involve different pathways in estuarine and freshwater organisms, current models remain incomplete for euryhaline palaemonid shrimp.
Gabriela E. Musin, Silvina A. Pinoni, Romina B. Ituarte   +2 more
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Freshwater shrimp, prawns, crab and crayfish (Decapoda)

2002
Decapods are usually large, highly mobile animals. They are often the largest invertebrates in a stream and as a result are an important part of the food chain.
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The distribution of freshwater shrimps (Atyidae and Palaemonidae) in Jamaica

Zoological Journal of the Linnean Society, 1978
The distribution of freshwater shrimps in Jamaica is presented. Atya innocous, Atya lanipes, Atya scabra, Micratya poeyi and Macrobrachium heterochirus were found only in the high-gradient streams characteristic of eastern and north-eastern parishes.
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Diversity, Distribution and Conservation of Freshwater Crabs and Shrimps in South America

2016
South America has a huge diversity of freshwater decapods that occupy a variety of ecosystems including major rivers, lakes, wetlands, and mountain streams. Although large areas of the continent’s freshwater ecosystem are still pristine and well preserved, many decapod species are increasingly impacted by different anthropogenic threats.
Magalhães, Célio, Campos, Martha R., Collins, Pablo Agustin, Mantelatto, Fernando L.   +3 more
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