Environmental aspects of tuna catches in the Indian Ocean, southern coast of Java, based on satellite measurements

2018 ◽  
Author(s):  
Hind Lahlali ◽  
Anindya Wirasatriya ◽  
Erwan Gensac ◽  
Muhammad Helmi ◽  
Kunarso ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Southern Coast ◽  
Environmental Aspects ◽  
Satellite Measurements ◽  
The Indian Ocean

Some ascidians from the southern coast of Madagascar collected during the “AtimoVatae” survey

Zootaxa ◽  
2012 ◽  
Vol 3197 (1) ◽  
pp. 1 ◽  
Author(s):  
FRANÇOISE MONNIOT
Keyword(s):  
South Africa ◽  
Indian Ocean ◽  
Coral Reefs ◽  
Plankton Community ◽  
Southern Coast ◽  
Southern Limit ◽  
Scuba Divers ◽  
Littoral Invertebrates ◽  
The Indian Ocean ◽  
The Western Pacific

Surveys of littoral invertebrates along the southern coast of Madagascar have produced the first study of ascidians in this part of the Indian Ocean. Collections were made by SCUBA divers in May and June 2010 down to 25m depth. This region is considered the southern limit for coral reefs but remains diverse biologically. Upwellings and an abundant plankton community particularly favour the abundance of ascidians in this area. Of the 39 species of non-didemnid species described here, eight are new. Ten species are common to South Africa. Other species were for the most part already known from the Mozambique Channel and a few have also been recorded in the western Pacific (either cosmopolitan or introduced).

scholarly journals Phylogenetic phytogeography of the family Cymodoceaceae

2020 ◽  
Vol 19 (2) ◽  
pp. 094-097
Author(s):  
А. А. Iurmanov ◽  
M. S. Romanov ◽  
A. V. Bobrov
Keyword(s):  
Indian Ocean ◽  
World Ocean ◽  
Southern Coast ◽  
Tropical Waters ◽  
The Family ◽  
The World ◽  
The Indian Ocean

The oldest representatives of Cymodoceaceae supposedly arose in the tropical waters of East Gondwana inCretaceous and later settled along the World Ocean by various tracks, the most important of which passed along the southern coast of Eurasian continental masses and reached the waters of modern Atlantic. More advanced genera Cymodocea,Syringodium originated in these areas and moved “back” to the waters of the Indian Ocean and the southwestern Pacific.

scholarly journals Satellite measurements of formaldehyde linked to shipping emissions

2009 ◽  
Vol 9 (21) ◽  
pp. 8223-8234 ◽  
Author(s):  
T. Marbach ◽  
S. Beirle ◽  
U. Platt ◽  
P. Hoor ◽  
F. Wittrock ◽  
...  
Keyword(s):  
Sri Lanka ◽  
Indian Ocean ◽  
Atmospheric Chemistry ◽  
Marine Boundary Layer ◽  
Pollution Source ◽  
Ship Emissions ◽  
Satellite Measurements ◽  
The Indian Ocean ◽  
Coarse Model ◽  
High Pass

Abstract. International shipping is recognized as a pollution source of growing importance, in particular in the remote marine boundary layer. Nitrogen dioxide originating from ship emissions has previously been detected in satellite measurements. This study presents the first satellite measurements of formaldehyde (HCHO) linked to shipping emissions as derived from observations made by the Global Ozone Monitoring Experiment (GOME) instrument. We analyzed enhanced HCHO tropospheric columns from shipping emissions over the Indian Ocean between Sri Lanka and Sumatra. This region offers good conditions in term of plume detection with the GOME instrument as all ship tracks follow a single narrow track in the same east-west direction as used for the GOME pixel scanning. The HCHO signal alone is weak but could be clearly seen in the high-pass filtered data. The line of enhanced HCHO in the Indian Ocean as seen in the 7-year composite of cloud free GOME observations clearly coincides with the distinct ship track corridor from Sri Lanka to Indonesia. The observed mean HCHO column enhancement over this shipping route is about 2.0×1015 molec/cm2. Compared to the simultaneously observed NO2 values over the shipping route, those of HCHO are substantially higher; also the HCHO peaks are found at larger distance from the ship routes. These findings indicate that direct emissions of HCHO or degradation of emitted NMHC cannot explain the observed enhanced HCHO values. One possible reason might be increased CH4 degradation due to enhanced OH concentrations related to the ship emissions, but this source is probably too weak to fully explain the observed values. The observed HCHO pattern also agrees qualitatively well with results from the coupled earth system model ECHAM5/MESSy applied to atmospheric chemistry (EMAC). However, the modelled HCHO values over the ship corridor are two times lower than in the GOME high-pass filtered data. This might indicate uncertainties in the satellite data and used emission inventories and/or that the in-plume chemistry taking place in the narrow path of the shipping lanes are not well represented at the rather coarse model resolution.

scholarly journals Satellite measurements of formaldehyde from shipping emissions

2009 ◽  
Vol 9 (2) ◽  
pp. 10487-10511 ◽  
Author(s):  
T. Marbach ◽  
S. Beirle ◽  
U. Platt ◽  
P. Hoor ◽  
F. Wittrock ◽  
...  
Keyword(s):  
Sri Lanka ◽  
Indian Ocean ◽  
Atmospheric Chemistry ◽  
Marine Boundary Layer ◽  
Pollution Source ◽  
Satellite Measurements ◽  
The Indian Ocean ◽  
Ship Tracks ◽  
Coarse Model ◽  
High Pass

Abstract. International shipping is recognized as a pollution source of growing importance, in particular in the remote marine boundary layer. Nitrogen dioxide originating from ship emissions has previously been detected in satellite measurements. This study presents the first satellite measurements of formaldehyde (HCHO) linked to shipping emissions as derived from observations made by the Global Ozone Monitoring Experiment (GOME) instrument. We analyzed enhanced HCHO tropospheric columns from shipping emissions over the Indian Ocean between Sri Lanka and Sumatra. This region offers good conditions in term of plume detection with the GOME instrument as all ship tracks follow a single narrow track in the same east-west direction as used for the GOME pixel scanning. The HCHO signal alone is weak but could be clearly seen in the high-pass filtered data. The line of enhanced HCHO in the Indian Ocean as seen in the 7-year composite of cloud free GOME observations clearly coincides with the distinct ship track corridor from Sri Lanka to Indonesia. The observed mean HCHO column enhancement over this shipping route is about 2.0×1015 molec/cm2. The observed HCHO pattern also agrees qualitatively well with results from the coupled earth system model ECHAM5/MESSy applied to atmospheric chemistry (EMAC). However, the modelled HCHO values over the ship corridor are two times lower than in the GOME high-pass filtered data. This might indicate that the used emission inventories are too low and/or that the in-plume chemistry taking place in the narrow path of the shipping lanes are not well represented at the rather coarse model resolution.

scholarly journals Presence of Anisakis nematode larvae in Indian mackerel (Rastrelliger spp.) along the Indian Ocean southern coast of East Java, Indonesia

2018 ◽  
Vol 20 (1) ◽  
pp. 313-319
Author(s):  
EKO SETYOBUDI ◽  
IZANATUR ROHMAH ◽  
RIZKA FAUZIANA SYARIFAH ◽  
LISA RAMATIA ◽  
MURWANTOKO MURWANTOKO ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Digestive Tract ◽  
Marine Mammals ◽  
Body Cavity ◽  
Final Host ◽  
Southern Coast ◽  
Mean Intensity ◽  
Indian Mackerel ◽  
Nematode Larvae ◽  
The Indian Ocean

Setyobudi E, Rohmah I, Syarifah RF, Ramatia L, Murwantoko, Sari DWK. 2019. Presence of Anisakis nematode larvae in Indian mackerel (Rastrelliger spp.) along the Indian Ocean southern coast of East Java, Indonesia. Biodiversitas 20: 313-319. In this study, we aimed to determine the prevalence (P), mean intensity (MI) and site of infection of anisakid larvae (Nematoda) in Indian mackerel (Rastrelliger spp.) at the Indian Ocean Southern Coast of East Java. A total of 341 fish were collected from Prigi and Muncar Fish Harbor, East Java during March-April 2018. Each fish specimen was measured in body length and weight, and then dissected for examination of Anisakis larvae in the body cavity, digestive tract, liver, gonad and muscle. The collected larvae were preserved in absolute ethanol for both morphological and molecular identification. The results of this research showed Indian mackerel was susceptible to Anisakis infection (P=17%, MI =6.8 larva/individual fish). Most of the larvae were found in the digestive tract and body cavity, 47.2% and 46.0% respectively. Only a few larvae were found in other internal organs and muscle. Based on morphological identification, these larvae corresponded to Anisakis Type I. Furthermore, in molecular identification using PCR-RFLP, the banding pattern clearly matched with Anisakis typica. The prevalence and mean intensity of Anisakis nematodes on Indian mackerel along the southern coast of East Java seem to be different in each locality and from other adjacent waters as has previously been reported, which may be due to differences in feeding habits and in the distribution of marine mammals as the final host. The results suggest that differences in prevalence and mean intensity of anisakis larvae infection could be developed as a biological indicator of fish stock discrimination. However, clear information regarding food habits of Indian mackerel and migration patterns of the paratenic hosts as well as of marine mammals as final host is needed.

scholarly journals PEMANFAATAN TUNA SIRIP BIRU (SOUTHERN BLUE FIN TUNA)

2017 ◽  
Vol 1 (2) ◽  
pp. 121
Author(s):  
Victor P. H. Nikijuluw
Keyword(s):  
Indian Ocean ◽  
Southern Coast ◽  
Spawning Area ◽  
The Indian Ocean

Tuna sirip biru adalah ikan berharga tinggi yang semakin kurang populasinya akibat penangkapan secara ekstensif. Ikan ini hanya terdapat di Samudera Hindia. Daerah pemijahannya diduga di perairan selatan Bali dan Lombok. Pengelolaan konservasi ikan ini dilakukan oleh Commission for the Conservation of Southern Blue Fin Tuna, di mana Indonesia adalah salah satu anggotanya. Kehadiran Indonesia sebagai anggota menuntut Indonesia untuk ikut melakukan konservasi terhadap spesies ini. Namun, Indonesia juga patut mengembangkan perikanan dan perdagangan spesies ini bagi kepentingan nasional.Southern blue fin tuna is a high priced fish which tends to have declining its population due to extensive fishing. The Indian Ocean is the species only habitat. Its spawning area is confined to the waters of southern coast of Bali and Lombok. The management conservation of the southern blue fin tuna is done by the Commission for the Conservation of Southern Blue Fin Tuna, where Indonesia as one of the members. The membership consequence is that Indonesia should undertake conservative actions and mechanisms for the species. Indonesia may develop fishery and trading of the species for its own benefit and interest.

scholarly journals Community Resilience in facing Tsunami Disaster in the Coastal Areas of Purworejo Regency

2021 ◽  
Vol 884 (1) ◽  
pp. 012001
Author(s):  
RF Abdul Latif ◽  
Chatarina Muryani ◽  
Yasin Yusup
Keyword(s):  
Data Analysis ◽  
Indian Ocean ◽  
Secondary Data ◽  
Qualitative Approach ◽  
Southern Coast ◽  
Tsunami Disaster ◽  
Central Java ◽  
The Indian Ocean ◽  
Depth Interviews ◽  
Central Java Province

Abstract Purworejo Regency is one of the regencies in Central Java Province, which is directly adjacent to the Indian Ocean. Because the topography of the southern coast of Purworejo Regency is relatively flat, the area's vulnerability to a tsunami is high. A resilient community is needed to reduce the number of victims in the event of an earthquake and tsunami. This study aims to analyze the level of resilience of the southern coastal community of Purworejo Regency to the tsunami disaster. This research uses a qualitative approach. Collecting data using in-depth interviews with selected respondents, observation, secondary data analysis, and questionnaires. Data analysis used the scorecard toolkit version 2 with 22 questions for each question with five answer options. With a score of 1 to 5. The result of this study indicate that of the 16 villages the coastal area of Purworejo Regency, all of them have a caution zone status.

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