Effects of Change in Catchability on Sampling of Juvenile and Adolescent Banana Prawns, Penaeus merguiensis de Man

1979 ◽  
Vol 30 (4) ◽  
pp. 511 ◽  
Author(s):  
DJ Staples ◽  
DJ Vance
Keyword(s):  
Phase Shift ◽  
Major Part ◽  
Carapace Length ◽  
Spring Tide ◽  
High Water ◽  
Seasonal Cycles ◽  
Sampling Strategies ◽  
Large Variability ◽  
De Man ◽  
Penaeus Merguiensis

To provide the information necessary for optimizing sampling strategies, the effects of tidal, diurnal, lunar and seasonal cycles on the catchability of juvenile and adolescent banana prawns, P. merguiensis, were examined in the Norman River and in the inshore coastal zone of the Gulf of Carpentaria. A major part of the large variability in catches in both environments was attributable to marked tidal periodicity in catchability. In the river, large catches of juvenile P. merguiensis were taken only at or near the time of low water during both the neap and spring tide periods. Smaller prawns (< 12 mm carapace length) tended to be even more restricted to the time of low water than were larger prawns. This phase shift in catchability of larger prawns was particularly evident in the offshore sampling where large catches of adolescent prawns were made only at high water. Both the number and size of prawns caught also varied considerably with water depth. The reasons for the marked differences in catchability throughout a tidal cycle are not clear, but it is obvious that sampling can be restricted in time, thus providing much more consistent data with a minimum of effort.

scholarly journals Analisis Pola Pertumbuhan dan Morfometrik Udang Jerbung (Penaeus merguiensis De Man, 1888) di Perairan Sekitar Bakoi, Sorong Selatan

2021 ◽  
pp. 144-153
Author(s):  
Ridwan Sala ◽  
Roni Bawole ◽  
Aldrin Bonggoibo ◽  
Thomas Frans Pattiasina ◽  
Sampari Suruan ◽  
...  
Keyword(s):  
Carapace Length ◽  
Allometric Growth ◽  
Total Length ◽  
West Papua ◽  
Data Collections ◽  
De Man ◽  
The Relationship ◽  
Best Estimator ◽  
Fishing Area ◽  
Penaeus Merguiensis

The waters of South Sorong have potential shrimp resources, including abundant banana shrimp (Penaeus merguiensis de Man, 1888). This study aims to obtain information about the morphometric characteristics and growth of banana shrimp in the fishing area around the waters of Kampung Bakoi, South Sorong Regency, West Papua Province. Data collections were carried out in June and October 2019 using descriptive methods with direct observation techniques. Based on the results of data analysis, it was found that the total length of shrimp caught in Bakoi Village was in the range of 10 - 26.8 cm and the most were caught measuring 15.2 cm to 16.4 cm. The model of the relationship between length and weight of banana shrimp in Bakoi Village follows the equation Log W= 1,630+2,659 Log (L) or the form of negative allometric growth. Analysis of the relationship between total length (Y) and carapace length (X) (including rostrum) and the relationship between total length and carapace length (Z) (excluding rostrum) obtained the best estimator models, each following the logarithmic equations L = -2,188 + 10,226 Ln(PK) and L = 4,439 + 9,201 Ln(PKt) respectively.

scholarly journals ASPEK BIOLOGI UDANG JERBUNG (Penaeus merguiensis de Man, 1888) DI PERAIRAN KENDAL, JAWA TENGAH

2018 ◽  
Vol 6 (2) ◽  
pp. 128-136
Author(s):  
Katrina Dwika Sari ◽  
Suradi Wijaya Saputra ◽  
Anhar Solichin
Keyword(s):  
Sex Ratio ◽  
Carapace Length ◽  
Condition Factor ◽  
Mesh Size ◽  
B Value ◽  
Biological Aspect ◽  
Male And Female ◽  
De Man ◽  
Mature Size ◽  
Penaeus Merguiensis

ABSTRAK Penangkapan udang P. merguiensis yang dilakukan secara terus menerus dan tidak sesuai kaidah yang baik dapat mengancam keberlangsungan hidup udang. Tujuan dari penelitian ini yaitu untuk mengkaji aspek-aspek biologi udang P. merguiensis seperti komposisi hasil tangkapan, struktur ukuran, nisbah kelamin, tingkat kematangan gonad (TKG), sifat pertumbuhan, faktor kondisi, dan ukuran pertama kali udang tertangkap (Lc50%). Selain itu, membuat konsep pengelolaan sumberdaya perikanan udang P. merguiensis. Metode penelitian yang digunakan yaitu metode survei. Pengambilan sampel udang P. merguiensis dilakukan di TPI Bandengan dan TPI Tawang Kabupaten Kendal, pada bulan Mei sampai Agustus 2016. Setiap bulan dilakukan satu kali pengambilan sampel. Sampel udang diambil dari total hasil tangkapan salah satu perahu pada setiap TPI. Hasil penelitian menunjukkan modus panjang karapas 20 mm pada bulan Juni dan Juli 2016, sedangkan pada bulan Mei dan Agustus 2016 modus panjang karapas 22 mm dan 24 mm. Perbandingan nisbah kelamin P. merguiensis jantan betina 1:0,95. Udang P. merguiensis jantan dan betina memiliki sifat pertumbuhan allometrik positif karena nilai b jantan dan betina sebesar 3,29 dan 3,23. Faktor kondisi udang P. merguiensis jantan dan betina sebesar 1,094 dan 1,096. Tingkat kematangan gonad udang P. merguiensis belum ada yang matang. Ukuran Lc50% udang P. merguiensis  jantan dan betina pada ukuran karapas 28 mm dan 27 mm. Konsep pengelolaan udang P. merguiensis di perairan Kendal yaitu mengganti alat tangkap arad menjadi trammel net, dan pengaturan daerah pengoperasian jauh dari pantai agar ukuran udang yang tertangkap adalah udang berukuran layak tangkap. Kata kunci : Penaeus merguiensis, Aspek Biologi, Perairan Kendal ABSTRACT Continuous fishing can threat the sustainability and not according to the rules of P. merguiensis shrimp resources. The objectives of this research were to know biological aspect such as composition of the catch, size of structure, sex ratio, gonad maturities (TKG), growth, condition factor, and first of length capture (Lc50%). In addition, was made management fisheries P. merguiensis shrimp resource. The method used in this research was survei method. Sampling was conducted in shrimp P. merguiensis Bandengan TPI and TPI Tawang Kendal, from Mei to Agustus 2016. Each month one-time sampling.  Shrimp samples were taken is about of the total fishing catch one of the boats at each TPI. The results showed that the mode carapace length of 20 mm in Juni and Juli 2016, while in Mei and Agustus 2016 the mode carapace length of 22 mm and 24 mm. Sex ratio of P. merguiensis shrimp male and female was 1:0,95. Growth of P. merguiensis male and female was positive allometric, because b value male and female was 3,29 and 3,23. Condition factor of P. merguiensis male and female was 1,094 and 1,096. Gonad maturities of P. merguiensis shrimp yet mature. Size Lc50% P. merguiensis shrimp male and female carapas length 28 mm and 27 mm.the concept of management of shrimp P.merguiensis in Kendal water replace the capture tool arad became a trammel net mesh size, and setting the operating areas away from the coast so that the size of the shrimp that are caught are decent-sized shrimp size. Keywords: Penaeus merguiensis, Biological Aspect, Kendal Water 

Growth of the banana prawn, Penaeus merguiensis De Man, as estimated from tagging studies in the Gulf of Papua

1985 ◽  
Vol 36 (6) ◽  
pp. 793 ◽  
Author(s):  
SD Frusher ◽  
D Gwyther ◽  
R Lindholm
Keyword(s):  
Carapace Length ◽  
Growth Parameters ◽  
Maximum Size ◽  
Von Bertalanffy ◽  
Differential Growth ◽  
Gulf Of Papua ◽  
De Man ◽  
Discrete Populations ◽  
Differential Growth Rate ◽  
Penaeus Merguiensis

To estimate the growth parameters of the banana prawn, P. merguiensis, a tag-recapture study, using vinyl streamer tags (Floy FTSL-731, was undertaken throughout the northern Gulf of Papua. Recapture data were analysed using Fabens' derivation of the von Bertalanffy growth curve. A differential growth rate was found between male and female banana prawns: L∞ and K values for males were 29.34 mm carapace length (C.L.) and 0.136 per week, and for females 35.34 mm C.L. and 0.117 per week, respectively. The assumptions applied in estimating the parameters by the Fabens method were not invalidated. These prawns were shown to have a smaller maximum size than banana prawns from the Gulf of Carpentaria, and it is proposed that two discrete populations exist.

scholarly journals A SURVEY OF MAN-MADE TIDAL SWIMMING POOLS ALONG THE SOUTH AFRICAN COAST

1982 ◽  
Vol 1 (18) ◽  
pp. 151
Author(s):  
D.E. Bosman ◽  
D.J.P. Scholtz
Keyword(s):  
South African ◽  
Spring Tide ◽  
High Water ◽  
Swimming Pools ◽  
The South ◽  
Recreational Facilities ◽  
African Coast ◽  
Shark Attacks ◽  
Rocky Coast ◽  
Tidal Pools

A large number of man-made tidal swimming pools (two examples are shown in Figure 1) exist along the South African coast. They are usually situated on rocky outcrops in the close vicinity of popular sandy bathing beaches to provide protected bathing conditions in these areas mainly for children and elderly people. Some tidal pools, especially along rocky coast, provide the only safe bathing facilities. Besides affording protection against waves and surfzone currents the pools provide protection from sharks. A large number of tidal pools were built during the early 1950s along the Natal South Coast after the occurrence of a relatively large number of shark attacks on bathers on that coast. The semi-diurnal tide with a range of about 1,5 m along the South African coast makes it possible for pools to be built such that water replenishment can occur during every high-water (approximately every 12 hours) during both neap and spring tide periods. Presently, there exists a great need for more tidal pools as part of the demand for more recreational facilities along the South African coast. However, no information on design criteria could be found in the literature.

scholarly journals Deskripsi dan Preferensi Habitat Udang Air Tawar Macrobrachium rosenbergii (De Man, 1879) dari Sungai Maraja, Toli-Toli, Sulawesi Tengah

2019 ◽  
Vol 8 (2) ◽  
Author(s):  
Aswandi Aswandi ◽  
Annawaty Annawaty
Keyword(s):  
Carapace Length ◽  
Economic Value ◽  
Line Drawing ◽  
Macrobrachium Rosenbergii ◽  
Maximum Size ◽  
Morphological Characters ◽  
Freshwater Prawn ◽  
Large Size ◽  
De Man ◽  
Central Sulawesi

Macrobrachium rosenbergii (De Man, 1879) is a freshwater prawn species that have a high economic value because of its relatively large size compared to the other freshwater prawn species. Exploration to find this species in the Maraja River, Toli-Toli, Central Sulawesi was carried out in January 2019. Sample collected using tray net. Two male specimens of M. rosenbergii were found in the river, with maximum size of carapace length reaching 45.94 mm. Macrobrachium rosenbergii has been found in habitats with clay substrate and slow flowing current. This record extended the distribution of M. rosenbergii, whose spread in Sulawesi has been known only in the southern part of the island, such as in Makassar, Bone, Pinrang, Wajo and Luwu. In this paper, the morphological characters and line drawing of some character M. rosenbergii from the Maraja River were provided.

scholarly journals Role of intertidal wetlands for tidal and storm tide attenuation along a confined estuary: a model study

2015 ◽  
Vol 3 (5) ◽  
pp. 3181-3224 ◽  
Author(s):  
S. Smolders ◽  
Y. Plancke ◽  
S. Ides ◽  
P. Meire ◽  
S. Temmerman
Keyword(s):  
Surface Area ◽  
Wave Attenuation ◽  
Spring Tide ◽  
Storm Surges ◽  
High Water ◽  
Water Levels ◽  
Storm Tide ◽  
Flood Risks ◽  
Model Study

Abstract. Coastal lowlands and estuaries are subjected to increasing flood risks during storm surges due to global and regional changes. Tidal wetlands are increasingly valued as effective natural buffers for storm surges by dissipating wave energy and providing flood water storage. While previous studies focused on flood wave attenuation within and behind wetlands, this study focuses on the effects of estuarine wetland properties on the attenuation of a storm tide that propagates along the length of an estuary. Wetland properties including elevation, surface area, and location within the estuary were investigated using a numerical model of the Scheldt estuary (Belgium, SW Netherlands). For a spring tide lower wetland elevations result in more attenuation of high water levels along the estuary, while for a higher storm tide higher elevations provide more attenuation compared to lower wetland elevations. For spring and storm tide a arger wetland surface area results in a better attenuation along the estuary up to a threshold wetland size for which larger wetlands do not further contribute to more attenuation. Finally a wetland of the same size and elevation, but located more upstream in the estuary, can store a larger proportion of the local flood volume and therefore has a larger attenuating effect on upstream high water levels. With this paper we aim to contribute towards a better understanding and wider implementation of ecosystem-based adaptation to increasing estuarine flood risks associated with storms.

scholarly journals Comparison of empirical models with intensively observed data for prediction salt intrusion in the Sumjin River estuary, Korea

2009 ◽  
Vol 6 (2) ◽  
pp. 1879-1905 ◽  
Author(s):  
D. C. Shaha ◽  
Y.-K. Cho
Keyword(s):  
River Discharge ◽  
Neap Tide ◽  
Spring Tide ◽  
River Estuary ◽  
High Water ◽  
Empirical Models ◽  
Length Scale ◽  
Salt Intrusion ◽  
Salinity Data ◽  
Comparative Results

Abstract. Intensive measurements of salt intrusion in the Sumjin River estuary were taken at high and low waters during both spring and neap tides in each season from August 2004 to April 2007. The estuary demonstrated partially- and well-mixed characteristics during the spring tide and stratified condition during the neap tide. The salt intrusion at high water varied from about 13.39 km in summer 2005 to 25.62 km in autumn 2006. The salt intrusion depended primarily on the freshwater discharges rather than those of spring-neap tidal oscillations. Analysis of three years of observed salinity data indicated that the salt intrusion length scale in the Sumjin River estuary was proportional to the river discharge to the −1/5 power. Five empirical models were applied to the Sumjin River estuary to explore the most suitable as an easy-to-use tool for prediction of the salt intrusion length as functions of the geometry, river discharge and tide. Comparative results showed that the Nguyen and Savenije (2006) model developed under both partially- and well-mixed estuaries yielded the most satisfactory results of all the models studied for computing the salt intrusion length in the Sumjin River estuary. Our study suggests that the model can generate reasonable results for stratified conditions also.

scholarly journals Morphology of Fresh and Cryopreserved Sperms of Banana Shrimp Penaeus merguiensis (De Man, 1888)

2012 ◽  
Vol 7 (1) ◽  
pp. 54-59 ◽  
Author(s):  
M. Ikhwanuddi ◽  
A.J. Memon ◽  
A.D. Talpur ◽  
M.I. Khan ◽  
M.O. Fariddudin ◽  
...  
Keyword(s):  
De Man ◽  
Penaeus Merguiensis
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