نتایج جستجو برای: western white shrimp female brood

تعداد نتایج: 626107  

2015
W. E. Feeney J. Troscianko N. E. Langmore C. N. Spottiswoode

Mimicry of a harmless model (aggressive mimicry) is used by egg, chick and fledgling brood parasites that resemble the host's own eggs, chicks and fledglings. However, aggressive mimicry may also evolve in adult brood parasites, to avoid attack from hosts and/or manipulate their perception of parasitism risk. We tested the hypothesis that female cuckoo finches (Anomalospiza imberbis) are aggres...

Journal: :international journal of aquatic biology 0
seyed hossein hoseinifar department of fisheries, gorgan university of agricultural sciences and natural resources, p.o.box: 336, gorgan, iran parviz zare msc. graduated student from gorgan university of agricultural science and natural resources, iran

in this study, partial and complete replacement of live food ( artemia nauplii) with a microdiet was investigated in post-larval indian white shrimp, fenneropenaeus indicus . post-larvae (pl 1 ) were stocked into nine 20-l vessels (5-l water volume) at a density of 50 l -1 . shrimp were fed six times a day over 10 days. at the end of the feeding period, there was no significant difference in qu...

2013
Shuxia Xue Yichen Liu Yichen Zhang Yan Sun Xuyun Geng Jinsheng Sun

BACKGROUND White spot syndrome virus (WSSV) is a causative pathogen found in most shrimp farming areas of the world and causes large economic losses to the shrimp aquaculture. The mechanism underlying the molecular pathogenesis of the highly virulent WSSV remains unknown. To better understand the virus-host interactions at the molecular level, the transcriptome profiles in hemocytes of unchalle...

Journal: :The Journal of animal ecology 2008
Markus Ost Barry D Smith Mikael Kilpi

1. With the aid of a novel survivorship model, an 8-year field study of social and maternal factors affecting duckling survival in eiders (Somateria mollissima) revealed that duckling survival probability varies in accordance with maternal brood-rearing strategy. This variability in survival provides compelling evidence of different annual fitness consequences between females that share brood-r...

M Afsharnasab, I Sharifpour , S Kakoolaki ,

Many shrimp farmers were suffering from White Spot Disease (WSD) onset in last decades. Oscillation of environmental factors could lead mortality in susceptible hosts. The results showed mortality started earliear (36h post inoculation) at 25OC in comparison to the temperature more than 29 OC as well as the salinity of 50 ppt in comparison to the lower degrees of salinities. It is concluded tha...

Journal: :تحقیقات دامپزشکی 0
امین اسمعیلی راد دانش آموخته، دانشکده دامپزشکی دانشگاه شهید چمران اهواز–ایران مجتبی علیشاهی گروه علوم درمانگاهی، دانشکده دامپزشکی دانشگاه شهید چمران اهواز–ایران مسعود قربانپور گروه پاتوبیولوژی، دانشکده دامپزشکی دانشگاه شهید چمران اهواز–ایران مهدی زارعی گروه بهداشت مواد غذایی، دانشکده دامپزشکی دانشگاه شهید چمران اهواز–ایران

background: shell is one of the most important by-products of shrimp processing methods which can potentially pollute the environment, whereas shrimp shell contain large amounts of chitin and chitosan and can be used as immune and growth stimulator in aquaculture. objectives: the purpose of present study was to investigate the effect of oral administration of chitosan extracted from litopenaeus...

2009
Yoriko Saeki Philip H. Crowley Charles W. Fox Daniel A. Potter

Polyembryonic parasitoids producing single-sex broods of clonal offspring provide an unusually clear window into the classic tradeoff between the number and size of offspring. We conducted a laboratory study of the encyrtid parasitoid Copidosoma bakeri parasitizing the noctuid Agrotis ipsilon to examine the way that size and number of offspring tradeoff in broods of each sex and to determine ho...

2013
Harold W. Manter Sergio Roberto Martorelli Robin M. Overstreet Sergio R. Martorelli Jean A. Jovonovich

The pathogenic penaeid shrimp viruses white spot syndrome virus (wSSv) and infectious hypodermal and hematopoietic necrosis virus (IhhNv) are reported for the first time from Argentina. They both occurred in wild crustaceans in Bahia Blanca Estuary, with wSSv detected by polymerase chain reaction (pCR) or real time quantitative pCR (qpCR) methods as infecting samples as high as 56% of the penae...

Arul, V., Yuvaraj, N.,

As white spot syndrome virus (WSSV) can be highly pathogenic in penaeid shrimp, various feed supplements have been tested to help to protect farmed shrimp against WSSV disease. Here a polysaccharide extract from Halophila ovalis (HO) seagrass was added to feeds at concentrations of 0.25, 0.5, and 1.0 g[a1] /kg to assess its ability to protect Black Tiger shrimp (Penaeus monodon) against WSSV ch...

2016
Zheguang Lin Paul Page Li Li Yao Qin Yingying Zhang Fuliang Hu Peter Neumann Huoqing Zheng Vincent Dietemann

The poor health status of the Western honey bee, Apis mellifera, compared to its Eastern counterpart, Apis cerana, is remarkable. This has been attributed to lower pathogen prevalence in A. cerana colonies and to their ability to survive infestations with the ectoparasitic mite, Varroa destructor. These properties have been linked to an enhanced removal of dead or unhealthy immature bees by adu...

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