scholarly journals Macrobenthic Composition of Sea Water Associated with Seagrass in East and West Portions of the Igang Bay, Nueva Valencia, Guimaras

2012 ◽  
Vol 7 (1) ◽  
Author(s):  
Mary Jean L. De La Cruz ◽  
June Raymund Peter Flores ◽  
Melchor M. Magramo ◽  
Christy Madas ◽  
Marlon Terunez
Keyword(s):  
Water Depth ◽  
Hermit Crab ◽  
Soft Coral ◽  
Sea Water ◽  
Hard Coral ◽  
Seagrass Community ◽  
East And West

The macrobenthic invertebrates are associated with seagrass communities in East and West at the Igang Bay, Nueva Valencia, Guimaras. Seven groups were found in West Igang which includes the hard coral, gastropod, bivalve, soft coral, starfish, limpet, hermit crab and cowrie while eight groups composed of bivalve, gastropod, snail, cowrie, hard coral, hermit crab and sponge were found in the seagrass community of East Igang. Results show that gastropod was the dominating group in both sites. The hard coral group was the most frequent to occur in West Igang while the gastropod in East Igang was frequently observed. Common groups in both sites were hard coral, gastropod, bivalve, and cowrie. West Igang had higher diversity of macrobenthos (H’ = 0.608) than the East Igang with (H’ = 0.513). Both sites have sandy, silty-muddy type of substrates although some portions of West Igang were rocky. Salinity ranged from 28 to 30 parts per thousand and temperature from 20.67 to 32.67 degrees Celsius. Water depth recorded ranged from 0.43 to 0.60 meters. The higher variability of substrates in West Igang probably promoted the higher diversity of macrobenthic groups in the area suitable for different attachments and mobility along with denser growth of seagrass in the said site. Keywords - Seagrass, Igang Bay, Macrobenthic invertebrates, hard corals, gastropod, bivalve

BIODIVERSITI DAN PEMULIHARAAN TERUMBU KARANG DI TIGA BUAH PULAU, MELAKA (Biodiversity and Conservation of Coral Reefs in Three Islands in Malacca)

2021 ◽  
Vol 22 (1) ◽  
pp. 180-197
Author(s):  
SYAIMAK ISMAIL ◽  
MOHAMAD SAUPI BIN ISMAIL ◽  
MUHAMMAD SAIFUL ISLAM ISMAIL ◽  
AEMY AZIZ
Keyword(s):  
Coral Reefs ◽  
Biodiversity Conservation ◽  
Soft Coral ◽  
Good Condition ◽  
Scuba Diving ◽  
Field Studies ◽  
The State ◽  
Hard Coral ◽  
Wide Range ◽  
State Museum

In the state of Melaka, there are eighteen islands recorded by the Melaka State Museum Corporation (PERZIM). Part of this island serves as a tourist island, and developed islands are also uninhabited islands. However, three islands are recorded to have amazing coral reefs that are still in good condition. The Penang Batu Maung Fisheries Research Institute (AkuaTAR) has conducted a study on the biodiversity of coral reefs around the waters of Pulau Dodol, Pulau Serimbun, and Pulau Undan. AkuaTAR researchers are using scuba diving methods, and at the same time, they did conservation on coral reefs that have been identified in the waters of the Straits of Melaka. The objective of this study is to record the types of community forms such as living corals and identify the species of coral reefs found in three islands in the state of Melaka in Pulau Undan, Pulau Dodol, and Pulau Serimbun. The study also implemented method observation by conducting field studies on the islands involved by doing scuba diving. Results and discussion of the search, these three islands are located in very clean, uninhabited waters. They have a wide range of coral biodiversity using soft coral reefs and hard coral reefs. The study also found that the three islands in the state have the largest coral reefs in the waters of the Straits of Melaka. Keywords: Biodiversity; Conservation; Coral; Three island; Melaka

Studies on Hydroid Differentiation, II. Colony Growth and the Initiation of Sexuality1

Development ◽  
1963 ◽  
Vol 11 (1) ◽  
pp. 239-253
Author(s):  
Maxwell H. Braverman
Keyword(s):  
Hermit Crab ◽  
Sea Water ◽  
Colony Growth ◽  
Microscope Slide ◽  
Marine Snail ◽  
Colonial Hydroid

The colonial hydroid, Podocoryne carnea, is admirably suited to the study of differentiation (Braverman, 1962a). A colony growing on the shell of the marine snail Nassa consists of nutritive and generative zooids rising from a highly ramified and anastomosing stolon. If, instead of a snail, the shell is occupied by a hermit crab, a third type of person, the spiralzooid, is found on the dorsal lip of the shell (Cazaux, 1958; Braverman, 1960). Good descriptions of the animal appear in Allman (1871) and Berrill (1953). A single nutritive zooid removed from a colony and placed on a microscope slide in standing sea water attaches to the slide and gives rise to a colony. Colony growth consists of the formation of stolons attached to the substrate and of the appearance of zooids—first nutritive, then generative—on the stolons.

Chlorinated and brominated persistent compounds in hard coral, soft coral, and parrotfish from remote Mascarene islands

Chemosphere ◽  
2021 ◽  
Vol 267 ◽  
pp. 129316
Author(s):  
Veronica van der Schyff ◽  
Marinus du Preez ◽  
Karin Blom ◽  
Nee Sun Choong Kwet Yive ◽  
Jana Klánová ◽  
...  
Keyword(s):  
Soft Coral ◽  
Hard Coral ◽  
Mascarene Islands

The Identification and Nomenclature of the Surface Water Masses in the Tasman Sea (Data to the End of 1954)

1957 ◽  
Vol 8 (4) ◽  
pp. 369 ◽  
Author(s):  
DJ Rochford
Keyword(s):  
Surface Water ◽  
Sea Water ◽  
Maximum Velocity ◽  
Water Masses ◽  
Late Winter ◽  
The South ◽  
Coral Sea ◽  
Tasman Sea ◽  
East And West ◽  
Western Side

In this paper an examination of all available data on the hydrological characteristics of the Tasman Sea, prior to and including the year 1954, has permitted the identification and naming of eight surface water masses. Certain of their properties and general features of their season and region of occurrence and method of formation are summarized. Although little quantitative data are available some general features of the circulation of these water masses in the Tasman Sea are deduced from a study of their seasonal occurrence in relation to source regions. The Coral Sea water mass (chlorinity 19.60-19.70‰, temperature 20-26� C) flows from a source region in the north-west Coral Sea along the western side of the Tasman Sea and reaches maximum velocity off Sydney in October-December. The South Equatorial (chlorinity 19.50-19.60‰, temperature 24-26� C) also flows south along the western side of the Tasman Sea but reaches maximum velocity between February and March. These two water masses constitute the East Australian current. The Sub-Antarctic (chlorinity 19.15-19.30‰, temperature 10-14°C) is found at the surface in the south-eastern Tasman Sea between July and September. The Central Tasman (chlorinity 19.65-19.75‰, temperature 15-20‰C) flows to the west from its region of formation and generally flows north along the southern New South Wales coast in late winter. The South-west Tasman (chlorinity 19.50- 19.60‰, temperature 12-15°C) flows to the east in latitude 38�S. and curves south in a clockwise gyral off eastern Tasmania between October and December. The Xorth Bass Strait (chlorinity 19.66-19.75‰ temperature 12-17�C) flows from South Australia to the eastern approaches of Bass Strait. The East Central New Zealand (chlorinity 19.10-19.30‰, temperature 15-20°C) flows west through Cook Strait into the Tasman Sea in midsummer. The East and West Tasmanian (chlorinity 19.40- 19.50‰ temperature 10-14°C) form in midwinter in the southern part of Bass Strait and flow along the east and west coasts in the spring.

Gastropod predation sites: the role of predator and prey in chemical attraction of the hermit crab Clibanarius vittatus

1990 ◽  
Vol 70 (3) ◽  
pp. 583-596 ◽  
Author(s):  
D. Rittschof ◽  
C.M. Kratt ◽  
A.S. Clare
Keyword(s):  
Salivary Gland ◽  
Ionic Strength ◽  
Salivary Glands ◽  
Hermit Crab ◽  
Sea Water ◽  
Hermit Crabs ◽  
Muscle Proteins ◽  
Clibanarius Vittatus ◽  
Low Ionic Strength

Gastropod shells are essential to most hermit crabs. Shell availability limits hermit crab populations. Shells provide protection and the degree of shell-fit controls crab growth and fecundity. Crabs locate new gastropod shells from a distance under water by molecules released from gastropod flesh during predation events. Here we test the hypothesis that the salivary glands of the predatory gastropod are the source of enzymes that digest muscle proteins and release peptide attractants. We describe the anatomy of both the acinous salivary glands and the tubular accessory salivary glands of Busycon contrarium which are similar to those of B. carica. The salivary gland ducts empty at the mouth, suggesting a role in the primary digestion of food. We show that gastropod muscle proteins, extracted by salt solutions with the ionic strength of sea water and purified by precipitation in low ionic strength can be digested by gastropod salivary gland enzymes to generate peptides attractive to the hermit crab, Clibanarius vittatus, in field assays.

scholarly journals Sebaran dan Keanekaragaman Ikan Konsumsi pada Ekosistem Terumbu Karang di Teluk Majene, Provinsi Sulawesi Barat

Jurnal Airaha ◽  
2020 ◽  
Vol 9 (02) ◽  
pp. 105-115
Author(s):  
Andi Arham Atjo ◽  
Reski Fitriah
Keyword(s):  
Soft Coral ◽  
Hard Coral ◽  
Dead Coral ◽  
Visual Census

Tujuan penelitian ini adalah untuk  mengetahui Jenis dan sebaran ikan target konsumsi di Teluk Majene Prov, Sulawesi barat. Kondisi terumbu karang didata dengan menggunakan metode Transek segmen atau Point Intersept Transect  (PIT). Transek tersebut dibentangakan sesuai dengan titik yang telah ditentukan selanjutnya seorang penyelam melakukan penyelaman sepanjang transek 50 meter dan mencatat di kertas tahan air (underwater paper) substrat ataupun bentos yang berada tepat di bawah transek garis. Sedangkan jarak interval (point) pencatatan substrat ataupun bentos adalah setiap 50 cm ( Hill dan Wilkinson, 2004). Adapun kategori yang amati tiap titik 0,5 m yaitu Hard Coral (HC), Soft Coral (SC), Rubble (R), Dead Coral (DC),  Dead Coral Algae (DCA), dan Sand (S). Kelimpahan ikan target yang menghuni ekosistem terumbu karang didata dengan menggunakan metode sensus secara langsung  (Visual Census Method) (English et al.,1994), secara teknis pendataan ini dilakukan dengan metode belt transek.. Hasil dari penelitian ini menunjukkan bahwa Terdapat 28 jenis ikan karang yang merupakan target atau konsumsi penting di Teluk Majene. Jenis ikan yang terbanyak adalah dari jenis Caesio sp. Sedangkan untuk sebarannya, ikan target terdapat di seluruh ekosistem terumbu karang Teluk Majene. Sebaran yang terbanyak ada pada lokasi stasiun 6 tepatnya di Lingkungan Pasarang, Kelurahan Totoli.

scholarly journals SHALLOW BATHYMETRY ESTIMATION BASED ON LANDSAT 8 REMOTELY SENSED DATAAT BOHAI SEA

2020 ◽  
Vol XLII-3/W10 ◽  
pp. 941-943
Author(s):  
D. J. Zhang ◽  
J. Zhan ◽  
C. X. Wang ◽  
G. Q. Zhou
Keyword(s):  
Water Depth ◽  
Bohai Sea ◽  
Sea Water ◽  
Absolute Error ◽  
Inversion Method ◽  
Band Model ◽  
Landsat 8 ◽  
Ocean Monitoring ◽  
The Relationship ◽  
Monitoring And Measurement

Abstract. Bathymetry is a key variable in ocean monitoring and measurement research. It becomes more and more important for development of rapid method to invert shallow sea water depth. In this study, a water depth inversion method based on multi-band model is established to analyze the relationship between different bands of Landsat 8 OLI multi-spectral and measured data. The average absolute error of the model is 1.48m at 10–20m water depth and the average relative error is 13.12%. The water depth inversion accuracy under normal conditions are achieved, indicating that the model will have a promising practical application in the future.

A simulation study to identify the sea water depth for the presence of air waves in sea bed logging

2012 ◽  
Author(s):  
Muhammad Abdulkarim ◽  
Afza Shafie ◽  
Noorhana Binti Yahya ◽  
Radzuan Razali ◽  
Wan Fatimah Wan Ahmad
Keyword(s):  
Water Depth ◽  
Simulation Study ◽  
Sea Water ◽  
Sea Bed
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