• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 92
  • 33
  • 31
  • 5
  • 5
  • 3
  • 3
  • 3
  • 3
  • 3
  • 3
  • 2
  • 2
  • 1
  • 1
  • Tagged with
  • 188
  • 25
  • 16
  • 15
  • 14
  • 14
  • 12
  • 12
  • 11
  • 11
  • 11
  • 11
  • 10
  • 10
  • 10
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
111

Life history, population genetics and feeding ecology of Caridina cantonensis and C. serrata(decapoda: Atyidae) in Hong Kong streams

Yam, Sau-wai., 任秀慧. January 2005 (has links)
published_or_final_version / Ecology and Biodiversity / Doctoral / Doctor of Philosophy
112

Molecular characterization and expression of cytochrome P450 genes in marine shrimps

Chan, Yin-wah, 陳燕華 January 2007 (has links)
published_or_final_version / abstract / Biological Sciences / Master / Master of Philosophy
113

Functional analysis of the shrimp putative molt inhibiting hormone cDNAs (Liv-MIH1 and Pem-MIH1) by RNA interference

Mak, Chun-yin., 麥俊然. January 2007 (has links)
published_or_final_version / abstract / Biological Sciences / Master / Master of Philosophy
114

TOXICITY OF DI-2-ETHYLHEXYL PHTHALATE IN THE DIET OF PENAEID SHRIMP.

Hobson, James Farrier. January 1982 (has links)
No description available.
115

Double-stranded RNA induced gene silencing of neuropeptide genes in sand shrimp, Metapenaeus ensis and development of crustacean primary cell culture /

Guan, Haoji. January 2006 (has links)
Thesis (M. Phil.)--University of Hong Kong, 2006. / Title proper from title frame. Also available in printed format.
116

Double-stranded RNA induced gene silencing of neuropeptide genes in sand shrimp, metapenaeus ensis and development of crustacean primary cell culture /

Guan, Haoji. January 2006 (has links)
Thesis (M. Phil.)--University of Hong Kong, 2006. / Also available online.
117

Performance on Sanitary and Environmental Indicators and the Demand for Exports of Fishery Products: Case Study of the Shrimps and Prawns from Mozambique

Reinaldo Mendiate 18 March 2013 (has links)
No description available.
118

Influence of hydrological seasonality on sandbank benthos: algal biomass and shrimp abundance in a large neotropical river

Montoya Ceballos, Jose Vicente 15 May 2009 (has links)
In this study, I examined the influence of hydrological seasonality on spatiotemporal variation of algal biomass and shrimp abundance on sandbanks of the Cinaruco River in southwestern Venezuela. Seasonal variations of abiotic and biotic variables in the Cinaruco were driven by the hydrological regime. During the highwater periods, river sites in the main channel and lagoon sites were similar in water physicochemical variables and algal biomass. In contrast, physicochemical variables and algal biomass differed between river and lagoon sites during the low-water period. The absence of flow in lagoons and consistently low algal biomass on river sandbanks were the most important features of the spatial variability between main-channel and lagoon sandbanks during low-water phases. Benthic algal biomass was highly uniform at small spatial scales and significantly heterogeneous at large spatial scales. In the second major part of this dissertation, I found a relatively species-rich shrimp assemblage with seven species inhabiting the sandbanks of the Cinaruco. I also observed clear patterns of temporal and spatial variation in shrimp abundance on the Cinaruco sandbanks. Abundance of shrimp on the sandbanks presented remarkable diel variation, showing almost exclusive use of this habitat at nights. Seasonally, shrimp were more abundant during rising- and falling-water periods, when rapid changes of environmental conditions occur. Shrimp abundance was high on those sandbanks with absence of troughs and presence of submerged vegetation. These environmental features presumably promote colonization/establishment and survival/persistence of shrimp in the sandbanks. In a patch-dynamic view of communities, a mobility control model seems to apply to shrimp of the sandbanks in the Cinaruco during the period of rapid changes in hydrology and habitat structure. During low-water periods, when habitat structure of sandbanks is relatively constant, low shrimp abundance appears to be heavily controlled by high fish predation. The annual flood regime of the Cinaruco, which drives the concentrations of dissolved materials, affects material interchanges between aquatic and terrestrial systems, and modifies aquatic habitat structural complexity, is responsible for creating strong patterns of seasonal and spatial variation in benthic algal crops and shrimp abundance on the sandbanks of this large floodplain river.
119

Wound healing in ascorbic acid supplemented and deficient Penaeus californiensis and P. stylirostris: evidence of ascorbic acid dependent collagen formation

Hunter, Brian January 1979 (has links)
No description available.
120

An investigation of the ichthyofaunal by-catch of the Tugela Bank prawn trawlers.

Fennessy, Sean Thomas. January 1993 (has links)
The by-catch of penaeid prawn trawlers operating on the Tugela Bank of Natal was analysed at irregular intervals for a period of three years, from May 1989 to June 1992. This was primarily in response to claims by Iinefishermen that trawlers were catching and discarding juvenile Iinefish species. Catch and effort data were recorded from 159 trawls, and catch composition data from 110 trawls, over a depth range of 20 to 45 meters. A total of 108 teleost species were identified in the by-catch, six of which comprised 80 percent of overall teleost abundance by number. Many of these fish were small-sized shoaling species, which increased their vulnerability to trawlers, and the majority were considered to be estuarine-associated. Multivariate analysis of samples showed there to be significant differences in relative abundance of species by season and depth. Annual average by-catch and discarded quantities were estimated at 400 and 315 tonnes respectively. Discard:retained catch ratios' ranged from 4.25 (± 1.19) : 1 to 15.48 (± 3.86) : 1 for shallow (20-33 meters) and deep (33-45 meters) trawls respectively. Only one important Iinefish, the squaretail kob, Argyrosomus thorpei, occurred in prawn trawl catches. These fish were spawned four to six months prior to being caught and appeared to use the Tugela Bank as a nursery area. They were seasonally abundant, occurring mostly from January to March. During these months trawling effort was generally low, as the prawns had not yet migrated offshore in quantity. Per-recruit analyses showed that the removal of these age 0 fish by trawlers reduced yield-per-recruit and spawning biomass-per-recruit values for the A. thorpei fishery. Aspects of the biology of three common sciaenids occurring in trawl catches, Johnius dussumieri, J. amblycephalus and Otolithes ruber, were investigated. Most of the fish examined were juveniles which utilised the Tugela Bank as a nursery area, owing to the existence of suitable food, and the turbid waters afforded them protection from predators. Standard biological data, such as length frequencies, lengthweight relationships and size at 50% maturity are presented. Based on the data collected and the analyses presented here, management recommendations are presented, which include the improvement of the collection of catch and effort data for the Tugela Bank prawn trawlers; communication of the results of this study to prawn trawler operators in order to encourage the reduction of trawling effort early in the year; consideration to be given to the re-surveying of Tugela Bank ichthyofaunal by-catch in the future in order to assess potential long-term effects of trawling in the area. / Thesis (M.Sc.)-University of Natal, 1993.

Page generated in 0.035 seconds