Length weight relationship of prawns and shrimp

Gopalakrishnan - LENGTH-WEIGHT RELATIONSHIP OF SHRIMP . female giant tiger prawn factor (K) of the shrimps was estimated from mean length Penaeus. and giant prawns (Macrobrachium sp.). White shrimp related to length-weight relationship and the condition factor of white shrimp Penaeus merguiensis in. Length-weight relationship and allometric factor for the imported L. . The origin of broodstock prawns to these shrimp hatcheries is unknown, furthermore the.

According to Hartnollthe pattern of weight gain is ontogenetically determined, and may vary between males and females of the same species or even among different populations. The most common pattern for M. The condition factor of M. In addition, although the monthly means of the allometric condition factor obtained for females were about 1. January-April showed that males achieved better conditions for weight gain than females, even though in both sexes the observed Kr was greater than 1.

According to Molion and Bernardo the rainy season in the eastern part of Northeast Brazil occur from April to July, during the winter in the southern hemisphere. During the period of the year when water temperature is higher and rainfall though increasing is below mm, the condition factor of M. On the other hand, when rainfall levels reached mm and water temperature dropped, the condition factor tends to be lower Fig.

Furthermore, considering the monthly values of Kr, it is possible to conclude that in the months when temperatures are higher and precipitation levels are raising, the condition factor of the prawns is above the expected value Fig. This corroborates the results found for the allometric condition factor and demonstrates the improved nutritional status of individuals in this period, compared to the period when temperature is lower and rainfall is dropping.

According to Pinheiro and Fiscarellithe condition factor can be influenced by food availability in the environment.

Gopalakrishnan - LENGTH-WEIGHT RELATIONSHIP OF SHRIMP | Jun Sun - senshido.info

Macrobrachium amazonicum is omnivorous, feeding on filamentous algae, diatoms, aquatic insects and organic debris Maciel and Valenti, Stomach analysis of specimens collected in dams in Northeast Brazil revealed large amounts of microalgae Maciel and Valenti, Several studies indicate that phytoplankton productivity and biomass in reservoirs are influenced by many interdependent factors, for instance temperature, precipitation, light and nutrient input Talling and Rzoska, ; Kimmel et al.

On the other hand, rainfall, nutrient availability and residence time of water exerts an important influence on seasonal variations in primary productivity in tropical water bodies Calijuri et al. According to Calijuri et al. At the same time, in the rainiest periods the availability of nutrients Henry et al. According to Chellappa et al.

Thus, longer days when there is more sunlight incidence, less rainfall and higher temperatures could increase primary production in the Pedra do Cavalo Reservoir and hence food availability for prawns, leading to greater accumulation of energy i. However, studies on the hydrological cycle and primary productivity of the Pedra do Cavalo Reservoir are needed to provide data that can be used to verify the influence of these aspects on the nutritional status of M.

Several authors have associated monthly or seasonal variations of the condition factor with the cycles of reproductive activity of fish and crustaceans; in general, lower condition factors are associated with investment of the accumulated reserves for reproduction e. However, ovigerous females of M. In addition to reproductive factors, a decrease in the monthly means of the condition factor may be related to energy investment for somatic growth.

Pinheiro and Taddei attributed a reduction in the values of the condition factor of Dilocarcinus pagei Stimpson, males to the molt cycle.

Length-weight relationships of thirteen penaeoid shrimps in the East China Sea

In the case of males and females of M. Therefore, it is possible that M. The study of weight gain and condition factor patterns through relative growth analyses proved to be an important tool to understand the biology of M.

Prawns Recipe ❤ Prawns / Shrimp Stew prepared in my Village by Grandma - Village Life

Furthermore, the results presented here provide important information about the "well-being" of M. Gilson, local fisherman, for his help in sampling the specimens.

Revista Brasileira de Zoologia, 20 3: Width-weight relationship and condition factor of Ucides cordatus Crustacea, Decapoda, Ucididae at a tropical mangroves of Northeast Brazil. Condition factor and carapace width versus wet weight relationship in the swimming crab Callinectes danae Smith Decapoda, Portunidae at the Santa Cruz Channel, Pernambuco State, Brazil.

Boletim do Instituto de Pesca, 26 1: Oecologia Brasiliensis, 12 1: The selection of suitable indices for the measurement and analysis of fish condition. Journal of Fish Biology, 34 2: Revista Brasileira de Biologia, 46 2: Revista Nordestina de Biologia, 10 2: Arquivos de Biologia e Tecnologia, 36 3: Temporal changes in the phytoplankton community structure in a tropical and eutrophic reservoir Barra Bonita, SP - Brazil.

Journal of Plankton Research, 24 7: Phytoplankton community and physical-chemical characteristics of water in the public reservoir of Cruzeta, RN, Brazil.

Brazilian Journal of Biology, 68 3: Mating system in caridean shrimp Decapoda: Caridea and their evolutionary consequences for sexual dimorphism and reproductive biology. Revista Chilena de Historia Natural, 76 2: Flood pulse influence and anthropic impact on the chemical composition and energy content of Oryza glumaepatula in an Amazonian lake. Population structure and reproductive biology of Macrobrachium amazonicum Heller, Decapoda: Brazilian Journal of Aquatic Science and Technology, 16 2: Biological Sciences, 25 1: Biological Sciences 27 1: Biological Sciences 28 2: Biota Neotropica, 10 1: Biological Sciences 30 2: Paleontological Electronica, 4 1: Accessed on 16 December Abele edThe Biology of Crustacea.

Embryology, Morphology and Genetics, Vol. New York, Academic Press. Reproductive and morphometric traits of Macrobrachium amazonicum Decapoda: Information on length- weight relationship of shrimps occurring in coastal waters of Pakistan is also scanty. Previous work on shrimps of Pakistan waters include a report by Tirmizi and Tahera mentioning briefly the length-weight relationship of Penaeus indicus, Metapenaeas affinis and Parapenaeopsis stylifera and that of Ayub who reported length-weight relationship of P.

No such information was available on Penaeus japonicus and Parapenaeopsis sculptilus. The present study provides some information about length-weight relationship and size frequency distibution of P. Materials and Methods Samples of penaied prawns were obtained from Korangi fish harbour on 15th May and 2nd June The shrimps were brought to the laboratory, their individual measurements were taken and correspcnding total weight w and meat weight MWT after removing head' in grams were obtained for each specimen.

Length-weight relationship of Penaeus japonicus and P. Result and Discussion The parameters a and b of the length- weight relationships of P. An exponential relationship was found between total length and total weight of P. In summer May- June P. Growth of meat weight remained at a slower rate than length in both species. Length-frequency histograms for P. Length-weight relationship for two species of prawns obtained in summer, from Korangi.

Length-weight relationships of thirteen penaeoid shrimps in the East China Sea

Length frequency histograms based on samples obtained in May, 1 June, 2 Fig. Length-weight relationship of P. Length frequency histograms based on samples obtained in May, June Spotted area denotes males, clear area denotes females P.