scholarly journals Efficiency of Different Traps and Baits for Catching Freshwater Prawn Macrobrachium Spp. for Broodstock Development

2021 ◽  
Vol 934 (1) ◽  
pp. 012051
Author(s):  
J D Pacho ◽  
A L Avillanosa ◽  
A P Avillanosa ◽  
C M A Caipang ◽  
R S Dagaraga ◽  
...  
Keyword(s):  
Freshwater Prawn ◽  
Sustainable Aquaculture ◽  
Collection Site ◽  
River Bank ◽  
Late Afternoon ◽  
Baited Traps ◽  
Fishing Gears ◽  
Aquaculture Industry ◽  
Bamboo Traps

Abstract Catching of wild freshwater prawns in Palawan is done by using different fishing gears, including baited traps. However, there are only limited studies related to the efficiency of these traps on catching freshwater prawns. In this study, the efficiency of four different traps (traditional plastic traps, bamboo traps, modified traps, and rattan traps) and three baits (low-valued fish, grilled coconut, and octopus) was tested in catching live Macrobrachium spp. from the rivers of two localities in the Barangay Bagongbayan, Roxas and Sitio Catama, Dumaran, Palawan at two sampling events with 12-hr intervals along the river bank. Each trap was deployed randomly 5-8 meters apart in the collection site late afternoon and retrieved the following day. The highest catch was obtained using plastic traps with low-value fish as bait. All samples from the different traps were collected alive. Modifications are underway to improve the design of these traps to improve catch efficiency. Regulating the collection of Macrobrachium from the wild by developing it into broodstocks will support the sustainable aquaculture industry using hatchery-produced seedstocks instead of sourcing it from the wild.

Microalgae in aquafeeds for a sustainable aquaculture industry

2017 ◽  
Vol 30 (1) ◽  
pp. 197-213 ◽  
Author(s):  
Mahfuzur Rahman Shah ◽  
Giovanni Antonio Lutzu ◽  
Asraful Alam ◽  
Pallab Sarker ◽  
M. A. Kabir Chowdhury ◽  
...  
Keyword(s):  
Sustainable Aquaculture ◽  
Aquaculture Industry

The influence of weather and time of day on trap catches of males and females of Lucilia cuprina (Wiedemann) (Diptera: Calliphoridae)

1985 ◽  
Vol 75 (2) ◽  
pp. 315-320 ◽  
Author(s):  
W. G. Vogt ◽  
T. L. Woodburn ◽  
R. Morton ◽  
B. A. Ellem
Keyword(s):  
Early Morning ◽  
Time Of Day ◽  
Lucilia Cuprina ◽  
Male And Female ◽  
Late Afternoon ◽  
Four Seasons ◽  
Baited Traps ◽  
Males And Females ◽  
Catch Rates ◽  
Trap Catches

AbstractDifferences in responses of males and females of Lucilia cuprina (Wiedemann) to carrion-baited traps were examined in Australia in relation to time of day, temperature, wind speed, relative humidity and solar radiation. The differences were small compared with responses obtained for the combined sexes (total catch), but the results were inconsistent over the four seasons of trapping. The seasons with most data (1975–1976 and 1981–1982) gave reasonably consistent results. Seasonal differences, although significant, were small enough to neglect for the purpose of standardizing trap catches. Time-of-day effects were also unimportant, except that males tended to be less active than females during the early morning (dawn-0900 h) and more active than females during the late afternoon (1500 h-dusk). Separate models are presented for standardization of male and female catch rates; the estimates differ from those obtained from total catches, but the differences are small compared to the observed day-to-day variation in catch rates.

scholarly journals Virtually the Reality: Negotiating the Distance between Standards and Local Realities When Certifying Sustainable Aquaculture

2019 ◽  
Vol 11 (9) ◽  
pp. 2603 ◽  
Author(s):  
Vilde S. Amundsen ◽  
Tonje C. Osmundsen
Keyword(s):  
Knowledge Production ◽  
Sustainable Aquaculture ◽  
Audit Process ◽  
Human Element ◽  
Salmon Aquaculture ◽  
Aquaculture Industry ◽  
The Many ◽  
Sustainability Standards

To account for the many challenges of increasingly global industries, remote regulation measures such as sustainability standards have become continuously more important as a means to ensure global accountability and transparency. As standard certification is assessed through audits, the legitimacy of these standards rests on uncritically evoked norms of auditing, such as independence and objectivity. In this paper, we seek to investigate the claim of these norms as a prerequisite for the audit process of sustainability standards. Based on interviews and fieldwork in the salmon aquaculture industry, we explore how it is possible to concurrently uphold the standard and account for the different conditions of the many local realities. Our findings point to the interactional character of audits, often downplayed for legitimacy purposes, and how this is vital to achieve both ‘distance for neutrality’ and ‘proximity for knowledge production’. We argue for increased transparency concerning the human element of sustainability auditing, thus acknowledging the significance of reciprocal knowledge production when using standards as a route towards sustainability.

scholarly journals Ghost fishing pada perikanan bubu di Perairan Sario Tumpaan Teluk Manado Provinsi Sulawesi Utara

2016 ◽  
Vol 2 (3) ◽  
Author(s):  
Dimas P. Wijaya ◽  
Emil Reppie ◽  
Lefrand Manoppo ◽  
Aglius T.R. Telleng
Keyword(s):  
Fish Mortality ◽  
Fish Trap ◽  
Fish Resources ◽  
Fishing Gears ◽  
Bottom Waters ◽  
The Common ◽  
The Impact ◽  
Descriptive Method ◽  
Bamboo Traps

ABSTRACT Fish trap made of bamboo is one of the common fishing gears used by fishermen in reef waters, due to its simple in construction, relatively inexpensive and easy to operate. If this trap got lost, however, it will give impact on fish mortality, with respect to ghost fishing. This study aims to determine the impact of ghost fishing traps to fish resources in Sario Tumpaan waters of Manado Bay; based on the descriptive method. Three units of bamboo traps placed in the bottom waters at a depth of about 6 m, and then observed by divers every day for a month. The impact of ghost fishing in the traps that have a net volume of 0.22 m3 was 4 fish per day, or 18 fish per day in traps that have a net volume of 1 m3. Keywords: ghost fishing, maximum catch, traps, Manado Bay   ABSTRAK Bubu yang terbuat dari bambu merupakan salah satu alat tangkap yang umum digunakan oleh nelayan untuk menangkap ikan di perairan karang, karena konstruksinya sederhana, relatif murah dan mudah dioperasikan. Tetapi jika alat ini hilang, maka akan memberikan dampak mortalitas ikan, sehubungan dengan ghost fishing. Penelitian ini bertujuan untuk mengetahui dampak bubu yang bersifat ghost fishing terhadap sumberdaya ikan, di perairan Sario Tumpaan Teluk Manado; yang didasarkan pada metode deskriptif. Tiga unit bubu bambu dipasang di dasar perairan pada kedalaman sekitar 6 m, kemudian dikunjungi oleh penyelam setiap hari selama sebulan. Dampak ghost fishing pada bubu yang mempunyai volume bersih sebesar 0.22 m3 adalah 4 ekor ikan per hari, atau 18 ekor ikan per hari pada bubu yang mempunyai volume bersih 1 m3. Kata-kata kunci: ghost fishing, tangkapan maksimum, bubu, Teluk Manado

scholarly journals POLA PRILAKU KEBERADAAN SEMUT FAMILI FORMICIDAE PADA TEPIAN SUNGAI MUSI GANDUS KOTA PALEMBANG SUMATERA SELATAN

2020 ◽  
Vol 20 (1) ◽  
pp. 116
Author(s):  
Riyanto Riyanto ◽  
Ari Saputra ◽  
Zainal Arifin
Keyword(s):  
Environmental Factors ◽  
Research Method ◽  
Research Station ◽  
River Bank ◽  
Monomorium Pharaonis ◽  
Settlement Area ◽  
Baited Traps ◽  
Paratrechina Longicornis ◽  
Almost All ◽  
Musi River

Abstrak: Faktor alam dan lingkungan dapat mempengaruhi pola keberadaan semut. Penelitian ini bertujuan untuk mempelajari pola keberadaan semut tanah di area permukiman tepian Sungai Musi Kecamatan Gandus Palembang. Metode penelitian ini adalah deskriftif.Stasiun penelitian meliputi rumah, tepi sungai, semak, butan dan kebun. Pengambilan contoh sampel semut menggunakan metode hand collecting dan perangkap umpan (baited trap).Hasil penelitian semut tanah Solenopsis germinata dan Paratrechina longicornis hampir ditemukan disemua stasiun.Spesies semut yang paling sedikit ditemukan, yaitu Diacamma intricatum danPheidole megacephala. Rumah kurang dari 100 m dari tepi sungai Musi ditemukan tiga spesies semut, yaitu dua dari subsuku Myrmicinae dan satu dari Formicinae (S. germinata, P. megacephala dan P. longicornis). Ketiga spesies ini sama dengan yang ditemakan pada semak-semak.  Lokasi yang berjarak 100-200 m dari tepi sungai memiliki komposisi dan keanekaragaman semut yang semakin meningkat. Stasiun rumah ditemukan sebanyak tiga spesies, yaitu S. germinata, Pheidole sp, dan P. longicornis. Stasiun semakditemukantiga jenis semut, yaitu S. Germinate, Monomorium pharaonisdan T. melanocephalum. Stasiun kebun ditemukan empat spesies, yaitu: Acanthomyrmex sp., S. germinata, P. longicornis, danCamponotus ligniperda.Stasiun hutan ditemukan enam spesies yaitu: Acanthomyrmex sp., S. germinata, P.longicornis, Camponotus ligniperda danDiacamma intricatum. Jumlah jenis semut yang paling banyak ditemukan adalah di stasiun hutan. Pola keberadaan semut di berbagai lokasi tepian sungai Musi Gandus Palembang memiliki pola fluktuasi jumlah dan jenisnya.Kata kunci: semut tanah, pola keberadaan, sungai Musi danPalembangAbstract: The natural and environmental factors can affect the pattern of ants. This study aims to study the pattern of the presence of soil ants in the settlement area of the banks of the Musi River, Gandus, Palembang. This research method is descriptive. The research station includes houses, river banks, bushes, butane and gardens. The sampling ant samples using the method of hand collecting and baited traps. The results of research on the ground ants Solenopsis germinata and Paratrechina longicornis are found in almost all of stations. The fewest ant species found were Diacamma intricatum and Pheidole megacephala. The houses less than 100 m from the banks of the Musi river are found by three ant species, namely two from the Myrmicinae sub-tribe and one from Formicinae (S. germinata, P. megacephala and P. longicornis). These three species are the same as those found in bushes. The location which is 100-200 m from the river bank has an ant composition and diversity that is increasing. The housestations were found as many as three species, namely S. germinata, Pheidole sp, and P. longicornis. The bush station found three types of ants, namely S. Germinate, Monomorium pharaonis and T. melanocephalum. The garden station found four species, namely: Acanthomyrmex sp., S. germinata, P. longicornis, and Camponotus ligniperda. The forest station found six species, namely: Acanthomyrmex sp., S. germinata, P.longicornis, Camponotus ligniperda and Diacamma intricatum. The number of ant species most commonly found is at the forest station. It can be concluded that the pattern of the presence of ants in various locations on the banks of the Palembang Gandus Musi river has a fluctuation in the number and type.Keywords: soil ants, existance pattern, Musi river, Palembang

The ecology of lutzomyia umbratilis Ward & Fraiha (Diptera: Psychodidae), the major vector to man of Leishmania braziliensis guyanensis in north-eastern Amazonian brazil

1986 ◽  
Vol 76 (1) ◽  
pp. 21-40 ◽  
Author(s):  
P. D. Ready ◽  
R. Lainson ◽  
J. J. Shaw ◽  
R. D. Ward
Keyword(s):  
At Risk ◽  
Leishmania Braziliensis ◽  
Forest Trees ◽  
Risk Of Infection ◽  
Light Traps ◽  
Late Afternoon ◽  
Resting Sites ◽  
Baited Traps ◽  
North Eastern ◽  
Amazonian Brazil

AbstractA description is given of the phlebotomine faunas of forests in north Pará State, Amazonian Brazil, that are endemic for ‘pian bois’-type dermal leishmaniasis of man caused by Leishmania braziliensis guyanensis. As judged by collections from human baits, mammal-baited traps, CDC miniature light traps and from various resting sites, only the females of Lutzomyia umbratilis Ward & Fraiha have the habits (both arboreal and terrestrial) and abundance (periodic, seasonal and spatial) consistent with being a major vector to man of Leishmania b. guyanensis. Man is at risk of infection by the bite of Lutzomyia umbratilis at any time of the year if he disturbs the females from their daytime resting sites (on and around the bases of the larger forest trees) or if he remains in the forest between late afternoon and dawn (1700–0700 h).

scholarly journals A comparative study on fish biodiversity with conservation measures of the Bhairabriver, Jessore, Bangladesh

2017 ◽  
Vol 3 (3) ◽  
pp. 357-367 ◽  
Author(s):  
Md Ashraful Islam ◽  
Abdulla Al Asif ◽  
Md Abdus Samad ◽  
Baadruzzoha Sarker ◽  
Meraz Ahmed ◽  
...  
Keyword(s):  
Habitat Degradation ◽  
Management Strategies ◽  
Community Members ◽  
Group Discussions ◽  
River Bank ◽  
Fish Biodiversity ◽  
Conservation Measures ◽  
Gill Net ◽  
Fishing Gears ◽  
Degraded Ecosystems

The present study was concerned to assess the present status of biodiversity in the Bhairab river, Jessore with its conservation measures. The study was based on primary observations, questionnaire interviews with 50 fishers, focus group discussions with river bank community members and cross-check interviews with key informants. The study was conducted for a period four months from May to August, 2016. The objective of the study was to assess the fish biodiversity in the Bhairab river, understand the existing fishing practices of the river and to identify proper management strategies for the conservation of fish biodiversity. Results of the study revealed that three kinds of fishers were engaged in the Bhairab river namely, professional fishers; seasonal fishers and subsistence fishers. Seven types of fishing gears like seine net, gill net, cast net, push net, lift net, trap and hook and line were operated to fish by the fishers during the survey. A total of 39 species of fish were identified in the catches of the Bhairab River. There are degraded ecosystems and declining biodiversity have found during the study. According to survey, fishing pressure and over fishing were responsible for almost 38% loss and pollution and siltation caused about 27% loss of ecosystem. Around 21% and 14% loss of ecosystem were caused by urbanization and human encroachment, and the recreational activities respectively. These have been created a great impact on river ecology. As a result, the water quality is deteriorating day by day and the availability of fish species and other aquatic biodiversity is decreasing gradually. During the survey, 20 species was found at a risk of being endangered. From the survey, it was found that the overexploitation of fish was responsible for the 40% losses of biodiversity in the Bhairab River and water pollution caused 35% loss of biodiversity. Henceforth, river course change and habitat degradation resulted in 15% and 10% loss of biodiversity of the river respectively. This study was identified possible ways to achieve a rich fish biodiversity in the Bhairab River with social, economic and environmental aspects. The specific recommendations are included community based fisheries management, establishment of sanctuary, control of pollution, maintenance of fishing gears and the implementation of fish act for conservation of fish biodiversity of the Bhairab River.Asian J. Med. Biol. Res. September 2017, 3(3): 357-367

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