scholarly journals Komunitas Krustasea di Kawasan Mangrove Desa Jangkaran Kabupaten Kulon Progo

2017 ◽  
Vol 19 (2) ◽  
pp. 79
Author(s):  
Sholihat Amalia ◽  
Djumanto Djumanto ◽  
Namastra Probosunu
Keyword(s):  
Water Depth ◽  
Current Velocity ◽  
Dominant Species ◽  
Carapace Length ◽  
White Shrimp ◽  
Substrate Type ◽  
Mangrove Area ◽  
The Family ◽  
Uca Annulipes ◽  
Penaeus Merguiensis

The objective of this study was to determine the diversity and abundance of krustaseans in the mangrove area of Jangkaran Village, Temon District, Kulon Progo Regency. Sampling was done bi-weekly from October 2016 to February 2017 on six stations defined by ecological character. Krustasean sampling was done using cest net, trap net and hand picking along the river with the extent of each collection station about 10 m2. The captured krustasean samples were cleaned, stored in ice-cooled boxes and transported to the laboratories to be identified and grouped according to species, then measured by carapace length and individual weight. Observation of aquatic environment was done by measuring temperature, brightness, water depth, current velocity, pH, salinity, dissolved oxygen, and substrate type. The results of the observation obtained 1 order, 7 families, and 26 species. The family krustaseans found were Coenobitidae, Diogenidae, Grapsidae, Ocypodidae, Palaemonoidae, Penaeidae, and Portunidae. The most dominant species of krustaseans were white shrimp (Penaeus merguiensis) as much as 25.06%, hermit crab (Clibanarius sp.) as much as 10.85%, and Uca annulipes as much as 10.59%. The fewest species of krustaseans found were Varuna yui of 0.13% and Ocypode sp. as much as 0.26%. The abundance value was 25.4 ind / m2, indices of diversity 2.60, richess index 0.87 and index of dominance 0.18.

The blackflies (Diptera: Simuliidae) of insular Newfoundland. III. Factors affecting the distribution and migration of larval simuliids in small streams on the Avalon Peninsula

1975 ◽  
Vol 53 (2) ◽  
pp. 114-123 ◽  
Author(s):  
David J. Lewis ◽  
Gordon F. Bennett
Keyword(s):  
Population Dynamics ◽  
Chemical Composition ◽  
Water Depth ◽  
Current Velocity ◽  
Substrate Type ◽  
Factors Affecting ◽  
Small Streams ◽  
And Migration ◽  
Avalon Peninsula ◽  
Significant Factors

Factors affecting the population dynamics, distribution, and migration of nine species of simuliid larvae in a complex of small streams on the Avalon Peninsula, Newfoundland, were studied. The most significant factors affecting the distribution and migration of simuliid larvae were current velocity, substrate type, and water depth; temperature, light, chemical composition of the water, and parasites were found to be of little or no significance.

scholarly journals A Habitat Preference Analysis of the Virgin Spinedace in Zion National Park

1988 ◽  
Vol 12 ◽  
pp. 199-202
Author(s):  
James Deacon ◽  
Anga Rebane
Keyword(s):  
Water Depth ◽  
Current Velocity ◽  
Habitat Preference ◽  
National Park ◽  
Substrate Type ◽  
Water Conductivity ◽  
Preference Analysis ◽  
Zion National Park ◽  
Suitability Index ◽  
Habitat Parameters

Distribution, abundance, and habitat utilization of the Virgin Spinedace, Lepidomeda mollispinis nnllispinis, is being studied at 12 stations in and near Zion National Park, Utah, and one at Lytle Ranch, Utah. Fish are being collected by seining and electroshocking, and associated habitat parameters of water depth, current velocity, substrate type, cover, and water conductivity are being measured. Suitability index curves for spinedace are being developed for depth, substrate, and current velocity.

scholarly journals Preliminary observations on living <i>Krithe praetexta praetexta</i> (Sars, 1866), <i>Sarsicytheridea bradii</i> (Norman, 1865) and other marine ostracods in aquaria

1995 ◽  
Vol 14 (2) ◽  
pp. 96-96 ◽  
Author(s):  
Stefan Majoran ◽  
Stefan Agrenius
Keyword(s):  
Water Content ◽  
Water Depth ◽  
West Coast ◽  
Dominant Species ◽  
Research Station ◽  
Sediment Layer ◽  
Marine Research ◽  
Morphological Variations ◽  
Sieve Fraction ◽  
Mode Of Life

Abstract. More than fifty years ago, Elofson (1941) showed that it is fully possible to maintain living cultures of marine ostracods in aquaria. He concentrated particularly on determining the generation length of several species. In this study, we provide some preliminary observations on the mode of life and morphological variations of marine ostracods kept in aquaria. They derive from a water depth of 40m in the Gullmar Fjord (58°17′N and 11°29′E), west coast of Sweden. The dominant species are Krithe praetexta praetexta (Sars, 1866) and Sarsicytheridea bradii (Norman, 1865). Other species housed in the aquaria are: Jonesia acuminata (Norman, 1865), Palmoconcha guttata (Norman, 1865), Palmoconcha laevata (Norman, 1865), Cytheropteron latissimum (Norman, 1865), Pterygocythereis jonesii (Baird, 1850), Acanthocythereis dunelmensis (Norman, 1865), Robertsonites tuberculatus (Sars, 1866), Elofsonella concinna (Jones, 1857) and Argilloecia conoidea (Sars, 1923).MATERIAL AND METHODSThe study was carried out at the Kristineberg Marine Research Station, west coast of Sweden, from July of 1992 to June of 1994. Sediment from a depth of 40 m in the Gullmar Fjord was sieved to remove the macrofauna and frozen, then thawed to constitute a 10–20 mm thick sediment layer in two 501 aquaria. The sediment consisted of 8 % sand (>63 μm), 44 % silt (>3.9 μm) and 49 % clay (<3.9 μm), and with a water content of 71 % ± 5% (σ = 2.4). Ostracods from the ≥250 μm sieve fraction of the dredge sample (from a depth of 40 m) were added to the aquaria. They were kept. . .

Effects of water depth and substrate type on growth dynamics and biomass allocation of Oryza rufipogon

2010 ◽  
Vol 30 (1) ◽  
pp. 16-21 ◽  
Author(s):  
Weifeng Dou ◽  
Haibing Wang ◽  
Xu Yang ◽  
Wei Xing ◽  
Guihua Liu
Keyword(s):  
Biomass Allocation ◽  
Water Depth ◽  
Growth Dynamics ◽  
Oryza Rufipogon ◽  
Substrate Type

Laboratory study of the effect of light on the emergence behaviour of eight species of commercially important adult penaeid prawns

1994 ◽  
Vol 45 (1) ◽  
pp. 43 ◽  
Author(s):  
TJ Wassenberg ◽  
BJ Hill
Keyword(s):  
Light Intensity ◽  
Laboratory Study ◽  
Carapace Length ◽  
Rate Of Change ◽  
Metapenaeus Ensis ◽  
The Third ◽  
Light Intensities ◽  
Commercially Important ◽  
Penaeus Merguiensis ◽  
Effect Of Light

The emergence behaviour of eight species of commercial prawns (between 25.0 and 30.0 mm carapace length) was studied in the laboratory. All except Penaeus merguiensis were nocturnal: they emerged from the substratum in the evening when the light was dimmed and buried themselves in the morning, usually before dawn. P. merguiensis generally remained on the substratum during the day. The species can be grouped on the basis of their behaviour: the first group (P. plebejus and P. latisulcatus) was most sensitive to light, the second group (P. semisulcatus, Metapenaeus ensis, P. esculentus, M. endeavouri and M. bennettae) was less sensitive to light, and the third (P. merguiensis) was least sensitive to light. To find out what triggered emergence, two species (P. esculentus and P. plebejus) were exposed to different rates of light dimming at dusk. Both species responded to absolute light intensity, but the response of P. plebejus was affected by the rate of change of light intensity. The different responses of the species to different light intensities explains some of the differences in catchability in a multi-species prawn fishery.

scholarly journals BIOACCUMULATION OF CADMIUM (CD) BY WHITE SHRIMP PENAEUS MERGUIENSIS AT DIFFERENT SALINITY IN KEDUNGMALANG ESTUARY, JEPARA (CENTRAL JAVA)

2015 ◽  
Vol 39 (1) ◽  
pp. 31-37 ◽  
Author(s):  
Corry Yanti Manullang ◽  
Johannes Hutabarat ◽  
Ita Widowati
Keyword(s):  
Water Quality ◽  
Quality Standards ◽  
White Shrimp ◽  
Central Java ◽  
Salinity Variability ◽  
Salinity Data ◽  
Salinity Difference ◽  
Penaeus Merguiensis

Estuarine of Kedungmalang has salinity variability and is assumed to bepolluted by cadmium (Cd) derived from human activities around Kedung region. In this study, bioaccumulation of Cd by white shrimp Penaeus merguienis in relation with salinity difference was determined. Sampling was conducted at four stations : estuary (15‰ and 25‰ of salinity) and husbandry area (15‰ and 25‰ of salinity). Data on in situ water quality parameters was obtained at each station. Absorption Atomic Spectrometer was used to measure Cd concentration. The water quality of parameters and the concentrations of Cd in the shrimp were compared with quality standards and weekly consumption limit of white shrimps is also suggested. The Cd concentrations on the white shrimp was found the highest concentration of 0.669 μg.g-1 . The limit comsumption of the white shrimp of Estuarine of Kedungmalang,suggested by the resut of this study, is about 523-1537 grams per week.

scholarly journals Growth parameter, mortality, recruitment pattern, and exploitation rate of white shrimp Penaeus indicus in northern coastal waters of Western Central Java, Indonesia

2019 ◽  
Vol 20 (5) ◽  
Author(s):  
SURADI WIJAYA SAPUTRA ◽  
ANHAR SOLICHIN ◽  
WIWIET TEGUH TAUFANI ◽  
SITI RUDIYANTI ◽  
NINIEK WIDYORINI
Keyword(s):  
Carapace Length ◽  
Growth Parameters ◽  
Growth Parameter ◽  
White Shrimp ◽  
Survey Method ◽  
Northern Coast ◽  
Recruitment Pattern ◽  
Central Java ◽  
Exploitation Rate ◽  
Penaeus Indicus

Abstract. Saputra SW, Solichin A, Taufani WT, Rudiyanti S, Widyorini N. 2019. Growth parameter, mortality, recruitment pattern, and exploitation rate of white shrimp Penaeus indicus on the northern coast of Central Java, Indonesia. Biodiversitas 20: 1318-1324. The aims of this study were to know the growth parameters, first lenght captured (Lc), mortality, recruitment pattern, and the exploitation rate of white shrimp (Penaeus indicus H.Milne Edwards, 1837) in the Western Coastal North Central Java Sea, Indonesia. Samples were collected from May 2016 to July 2017 using survey method and direct observations on fishing unit areas. The results showed that the relationship of the carapace length and weight is allometric. Based on the estimates of von Bertalanffy growth equation to the carapace length, the growth parameters of CL∞ and K values in male were 37 mm and 0.97, while in female were 38.5 mm and 0.85. While, the rates of total mortality (Z), natural mortality (M), and fishing mortality (F) were 3.5, 1.67, and 1.84 for males, and 5.03, 1.51, and 3.52 for females, respectively. The exploitation rate (E) of male shrimp was 0.52 and of female was 0.7 indicating that female shrimp get higher capture pressure than the males. It also showed that the rate of exploitation has to exceed the optimum sustainable yield (E>0.5). Time recruitment occurred throughout the year, with two peak seasons, i.e., in April-June and September-November. Moreover, the length of the carapace during recruitment was 15-20 mm. While the carapace length of the first caught (CL∞50) was 18.3 mm for male and 17.6 mm for female indicating that the P. indicus caught was still in the small size, as well as below the first mature gonad (CLm50 = 22-39 mm). This is because the mesh size of cod-end is 0.75 inches or about 2 cm.

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