No full-text available
To read the full-text of this research,
you can request a copy directly from the authors.
POTENTIALS YIELD AND FISHERIES OF MALAHAYU RESERVOIR, BREBES
Abstract
Fishing activity in Malahayu Reservoir has been done since long time. Unlimited fishing may impact to the decresing of fish resources of those waters. This study presents an assessment of fishing practices in Malahayu reservoir between 2008-2016 periods. Data of potential fish production and catch per unit effort were estimated by using different estimate models, catch per unit effort was analyzed annually, while potential fish production was analyzed by using five models namely model by Henderson & Welcome (1974), Teows & Griffith (1979), Marshal (1984), Moreau & De Silva (1991) and Crul (1992). The results show that changes of fish composition has accured, which was originally dominated by native fish while for now it is dominated by 72,05% of tilapia (Oreochromis niloticus) as an introduced fish. Furthermore, the average catch per unit effort (CPUE) in Malahayu reservoir is about 11,82 kg / fisherman, while the average potential production is about 198,55 kg / year. CPUE value and potential production indicate that exploitation rate in Malahayu Reservoir are in fully-exploited or perhaps over-exploited condition. Related to those conditions, not to increase the number of efforts (fishermen) as a management option towards sustainable fisheries.
... ton/tahun (Kartamihardja et al., 2011). Kajian lebih lanjut pada 2012 diperoleh potensi perikanan sekitar 399 ton/tahun (Laetje, 2012) dan sekitar 28,58-737,65 ton/tahun (Triharyuni et al., 2019). ...
... Terdapat salah satu konsep penangkapan maksimum, yaitu Maximum Sustainable Yield (MSY) yang merupakan jumlah tangkapan terbesar yang dapat diambil dari suatu jenis ikan dalam jangka waktu yang tak terbatas (Afifah & Pagalay, 2015). Tingkat pemanfaatan sumber daya ikan di Waduk Malahayu dalam kategari tangkapan penuh atau fully-exploited (Triharyuni et al., 2019). Kondisi ini diperlukan kehatihatian dalam mengendalikan upaya penangkapan, karena terlihat dari kecenderungan catch per unit effort (CPUE) yang terus menurun. ...
Waduk Malahayu merupakan salah satu waduk yang dimanfaatkan untuk perikanan. Kegiatan penangkapan di waduk ini telah lama dilakukan baik oleh nelayan sekitar maupun luar daerah. Saat ini telah terjadi indikasi adanya penurunan produksi sebagai akibat adanya degradasi sumber daya ikan dan lingkungan serta intensitas penangkapan yang tinggi. Diperlukan upaya pengelolaan untuk meningkatkan produksi ikan di Waduk Malahayu. Salah satu upaya tersebut adalah dengan melakukan penebaran ikan secara rutin baik oleh instansi pemerintah maupun nelayan setempat. Salah satu faktor keberhasilan penebaran ikan terhadap peningkatan produksi adalah jumlah padat tebar yang memadai. Akan tetapi, kajian mengenai jumlah padat tebar yang memadai melalui pendekatan model matematis belum banyak dilakukan. Model matematis mampu memperhitungkan aspek lain seperti penebaran kembali dan penangkapan ke dalam satu kajian model holistik dan analitik. Penelitian ini bertujuan untuk mengestimasi jumlah benih nila yang sebaiknya ditebar. Kondisi populasi ikan nila digambarkan dengan skenario laju pertumbuhan logistik, dengan pertimbangan adanya penebaran dan penangkapan. Hasil menunjukkan bahwa jumlah benih nila untuk ditebar sehingga dapat meningkatkan produksi adalah sekitar 8 ton/tahun atau setara dengan 533.333 ekor/tahun. Hasil dari kajian ini diharapkan bermanfaat bagi pengelolaan sumber daya ikan di Waduk Malahayu melalui pemulihan sumber daya. Fish stocking has been done as an effort to increase fish stock in Malahayu Reservoir. The need to fish stocking is due to the degradation of environment, fish resources and high exploitation either, lead to the decreasing of fish production on those reservoir. Fish stocking that intensively done by local government and community does not yet give an impact to the increasing of fish production. The amount of stocked seeds by using mathematical model approach has not done yet. Mathematical model approach is able to consider other aspects such as restocking activities and fishing into a holistic and analytical study. The current research aimed to estimate the amount of seed of Tilapia that properly stocked in Malahayu Reservoir. Population condition of Tilapia is described by logistic growth rate scenario, taking into account of stocking and fishing. In effort to increase the production, the amount of Tilapia should be stocked about 8 tonnes/year or 533.333 individuals/year. The results obtained in this research are expected to be beneficial for the management of fish resources in Malahayu Reservoir through stock enhancement.
Sistem pangan global semakin dituntut untuk memenuhi permintaan ikan seiring meningkatnya tingkat konsumsi ikan di masa depan. Tujuan penulisan makalah ini adalah untuk memberikan gambaran bahwa CBF sebagai solusi cepat dalam meningkatkan produksi ikan termasuk mengoptimalkan produktivitas di suatu perairan sehingga mempersempit kesenjangan antara permintaan akan sumber protein hewani dan pasokan sumberdaya ikan melalui peningkatan produksi. Melalui analisis deskriptif terhadap data statistik perikanan nasional tahun 2002-2017, kajian pustaka terkait dengan CBF dan hasil tangkapan yang didaratkan di Waduk Malahayu tahun 2008-2016, diperoleh gambaran bahwa upaya meningkatkan produksi ikan melalui CBF di Indonesia dengan mengikuti kaidah ilmiah merupakan opsi yang tepat untuk meningkatkan produksi perikanan tangkap. Penerapan CBF memerlukan penguatan kelembagaan, petunjuk teknis yang jelas dan tersosialisasi dengan baik serta penguatan peran lembaga penyedia benih. The global food system is increasingly being demanded to meet demand as the level of fish consumption increases in the future. The purpose of this paper is to provide an overview of CBF as a solution in narrowing the gap between the demand for sources of animal protein and the supply of fish resources through increased the production include maximizing the productivity. Through descriptive analysis of the national fisheries statistical data for 2002-2017, literature review related to CBF and catches landed in Malahayu reservoir in 2008-2016, an illustration is that efforts to increase fish production through CBF in Indonesia by following scientific rules are the right option to increase capture fisheries production respectively. Implementation of CBF requires institutional strengthening, clear technical guidance and well-socialized and strengthening the role of seed provider institutions.
Perikanan tangkap di waduk, merupakan potensi yang dapat diandalkan bagi pemenuhan kebutuhan hidup masyarakat sekitarnya, sayangnya kegiatan ini belum banyak mendapat perhatian pengelolaan. Terbukti dari masih sangat rendahnya kontribusi sektor perikanan tangkap waduk ini pada perekonomian daerah. Untuk digunakan sebagai basis pengelolaan, penelitian ini dilakukan untuk menganalisis pengaruh aktivitas produksi (penangkapan) terhadap kondisi sumber daya ikan seperti parameter biologi dan rente sumberdaya perikanan pada kondisi aktual, lestari, dan juga optimal, dengan menggunakan model bio-ekonomi standard logistik dan Gompertz. Skenario model yang digunakan adalah analisis bio-ekonomi model logistik Gordon Schaefer (GS) dengan estimasi parameter algoritma Fox, dan model Fox/Gompertz dengan estimasi parameter biologi seluruhnya algoritma CYP. Analisis perikanan tangkap dilakukan dengan menggunakan skenario rezim pengelolaan open access, Maximum Sustainable Yield (MSY) dan Maximum Economic Yield (MEY). Hasil penelitian menunjukan adanya overfishing dan overcapacity pada beberapa tahun pengamatan yang ditandai dengan adanya kelebihan effort baik pada Model GS maupun Gompertz. Pengelolaan dengan menggunakan rezim MEY memberikan nilai rente yang paling maksimum, dengan biomass yang lebih konservatif, dan effort yang lebih efisien, baik pada model GS maupun model Gompertz. Implikasi kebijakan pengelolaan waduk melalui rasionalisasi jumlah alat tangkap. Model MSY mengisyaratkan rasionalisasi alat tangkap lebih sedikit dibandingkan model MEY, sementara Model Gompertz mengisyaratkan penurunan alat tangkap lebih tinggi dibandingkan model GS. Alternatif pembatasan output atau kuota output juga dapat dilakukan dengan menggunakan nilai JTB. Title: Sustainable Fisheries Management in Cirata Dam: Bio-Economic ModellingCapture fisheries in the dam is a potential that can be relied for the surrounding community subsistence. Unfortunately this activity has not received much attention management. This was evident from the very low dam fisheries contribution, to the regional economy. For the purpose of fisheries management in the dam, this study was conducted to analyze the effect of production activities, on the condition of fish resources such as biological parameters and fishery resource rents on actual conditions, sustainable, and optimally, using bio-economic model of standard logistic and Gompertz. The scenario model used is the analysis of bio-economic model of logistics Gordon Schaefer (GS) with the parameter estimation of Fox algorithm, and Gompertz model with algorithm CYP for biological parameter estimation. Analysis of fisheries carried out by using a scenario of open access management regime, Maximum Sustainable Yield (MSY) and the Maximum Economic Yield (MEY). The results showed overfishing and overcapacity in several years of observation which is characterized by an excess of effort both on the GS model and Gompertz. Management using MEY regime provides the maximum possible value of rents, with biomass more conservative and more efficient effort, both on the GS model and the model of Gompertz. Policy implications reveal from the study is dam management through the rationalization of the number of fishing gear or boats. MSY model suggests rationalization of fishing gear less than the model MEY, while the Gompertz model implies a decrease in fishing gear higher than the GS model. Alternative output restrictions or quotas outputs can also be implemented by using the value of total allowable catch.
Stocking occurs in freshwater, estuarine and marine environments worldwide to replenish, maintain or enhance populations of aquatic organisms, especially fish as well as gastropods and crustaceans. Stock enhancement is used by fisheries managers to restore depleted populations of recreationally and commercially significant fish species. Stock enhancement is also used to increase productivity of a fishery by augmenting the natural supply of juveniles, and optimising harvests by overcoming recruitment limitation. Stock enhancement in culture-based fisheries is most often undertaken in small waterbodies on a regular basis to sustain or increase yields. Stocking typically involves the release of large numbers of early-life stage animals that are mass-produced in hatcheries.
The primary purposes of stocking in developed countries is for recovery of threatened species and to support recreational fishing, whereas in developing countries it ismore to increase food fish supplies for rural communities and improve their livelihood through income from fish harvested.
Stocking programs use seedstock produced for aquaculture purposes and in some cases captive breeding techniques have been established specifically to support stocking programs. Advances in techniques to breed fish in captivity have seen a proliferation in the number of species and quantities of juveniles produced in hatcheries for stocking.
In recent years, however, stocking programs have been subjected to substantial criticism due to perceived impact of hatchery-bred fish on genetic structure and fitness of wild stocks, transfer of disease, introduction of exotic species and non-target species, and their effects on other aquatic species and the environment.
To maximise the potential benefits to fisheries from stock enhancement, and to address the above criticisms, a responsible and ecologically sustainable approach should be adopted for all stocking programs. This requires, clear and well-defined objectives, an a priori evaluation of the need for stocking, well-formulated stocking strategies that consider the risks, benefits, the water to be stocked, and the fish to be used (e.g. species used, source of fish, size of fish, and number stocked). Equally important is the evaluation of stocking success in terms harvest yields as well as social, economic and cultural benefits. Other fisheries management measures will also need to be implemented to support stock enhancement, such as fisheries policies, regulations and guidelines for dealing with property and access rights. There are also technical aspects to consider, such as managing the stocked water bodies, harvesting, marketing, and education and training for participating communities.
Two indicators of fish exploitation, catch per unit effort (CPUE) and yield per unit area, were used with surveys of small‐scale fishery landings to compare two African reservoirs that differ in their level of fish exploitation, being high for Selingue Reservoir and low for Manantali Reservoir, both located in West Africa. The heavy exploitation in Selingue Reservoir induced a decline in catches per fishing trip (9.5 kg trip−1), whereas the catch remained high at Manantali Reservoir (17.0 kg trip−1). Moreover, the annual fish yield per unit area was lower for Manantali Reservoir (19 kg ha−1) than for Selingue Reservoir (79 kg ha−1). There was no relationship between the Morphoedaphic Index and catches for the two reservoirs. Rather, only the fishing effort and annual water‐level variations defined the reservoir fish yields. Based on the results of the present study, it appears that CPUE and fish yield per unit area represent simple and robust indicators for describing the impacts of fishing intensity in aquatic ecosystems.
Nursery management of catfish in outdoor pool to produce seeds in Malahayu reservoir
- S Andriyanto
- E Tahapari
- I Insan
Andriyanto, S., Tahapari, E., & Insan, I. (2012).
Nursery management of catfish in outdoor pool to
produce seeds in Malahayu reservoir, Brebes,
Central Java. Media Akuakultur, 7(10), 20-25.
DOI: http://dx.doi.org/10.15578/ma.7.1.2012.20-25
Models for estimating potential fish yields of African inland waters
- R C M Crul
Crul, R.C.M. (1992). Models for estimating potential
fish yields of African inland waters. CIFA
Occasional Paper. No. 16. Rome, FAO. 22p.
Estimation of the fish yield potentialof lake in north-east Germany
- U Bramick
Bramick. U. (2002). Estimation of the fish yield
potentialof lake in north-east Germany. Edited by
CowxI. G. Management and Ecology of lake and
reservoir fisheries. Blackwell Science. Iowa. 26 -33.
Morfometry characteristics and estimation of fish density in Malahayu reservoir using hidroacoustic method. Proceeding of Indonesian Fisheries National Seminar
- Z Fahmi
- A A Sentosa
Fahmi, Z., & Sentosa, A. A. (2014). Morfometry
characteristics and estimation of fish density in
Malahayu reservoir using hidroacoustic method.
Proceeding of Indonesian Fisheries National
Seminar, held on November, 20-21, 2014, 389-396.
Co-management guidance of Culture Based Fisheries (CBF) at Malahayu Reservoir
- E Kartamihardja
- S Purnomo
- K Koeshendrajana
- S Prisantoso
Kartamihardja, E, S., Purnomo, K., Koeshendrajana,
S., & Prisantoso, B.I. (2011). Co-management
guidance of Culture Based Fisheries (CBF) at
Malahayu Reservoir, Brebes Regency, Central
Java. Research Center for Fisheries Management
and Conservation, p. 29.
Predictive fish yield models for lakes and reservoirs of the Philipines, Sri Lanka and Thailand. FAO Fish
- J Moreau
- S Silva
Moreau, J., & De Silva, S, S. (1991). Predictive fish
yield models for lakes and reservoirs of the
Philipines, Sri Lanka and Thailand. FAO Fish.
Tech. p. 319.
Research on culture based fisheries, CBF in reservoirs/lakes in West of Java and Central Java
- K Purnomo
- E S Kartamihardja
- A Nurfiarini
- Z Nasution
Purnomo K., Kartamihardja, E.S., Nurfiarini, A., &
Nasution, Z. (2009). Research on culture based
fisheries, CBF in reservoirs/lakes in West of Java
and Central Java. Research Center for Capture
Fisheries (Unpublished report). p.47.
Carrying capacity and potential fish production in Sempor reservoir
- K Purnomo
- A Warsa
- E S Kartamihardja
Purnomo, K., Warsa, A., & Kartamihardja, E.S. (2013).
Carrying capacity and potential fish production in
Sempor reservoir, Kebumen District, Central Java.
J.Lit.Perikan.Ind, 19(4), 203-212. DOI: http://
dx.doi.org/10.15578/jppi.19.4.2013.203-212
Biological aspect of mendo fish (Acentrogobius sp) in Malahayu reservoir
- Y A Soekiswo
- N Widyorini
- A Solichin
Soekiswo, Y.A., Widyorini, N., & Solichin, A. (2014).
Biological aspect of mendo fish (Acentrogobius
sp) in Malahayu reservoir, Brebes District.
Diponegoro Journal of Maquares, 3(4), 154-160.
Potency and exploitation rate of fish resources in Indonesia Fisheries Management 2015. Paper presented of National Committee of Fish Stock Assessesment. Marine and Fisheries Research Institute
- A Suman
Suman, A. (2016). Potency and exploitation rate of
fish resources in Indonesia Fisheries Management
2015. Paper presented of National Committee of
Fish Stock Assessesment. Marine and Fisheries
Research Institute.
Sample-based fishery surveys -a technical handbook. FAO Fisheries Technical Paper
- C Stamatopoulos
Stamatopoulos, C. (2002). Sample-based fishery
surveys -a technical handbook. FAO Fisheries
Technical Paper. No. 425. Rome, FAO, p. 132.
Biolimnological and potential fish production in Darma reservoir
- D W H Tjahyo
Tjahyo, D. W.H. (2000). Biolimnological and potential
fish production in Darma reservoir, West Java.
J.Lit.Perik.Ind, 6 (3-4), 10-23. DOI: http://
dx.doi.org/10.15578/jppi.6.3-4.2000.10-23.
Assessment of fishery activities for enhanced management and improved fish production in Tekeze reservoir
- T Teame
- P Natarajan
- Z Tesfay
Teame, T., Natarajan, P., & Tesfay, Z. (2016).
Assessment of fishery activities for enhanced
management and improved fish production in
Tekeze reservoir, Ethiopia. International Journal of
Fauna and Biological Studies, 3(1), 105-113.
Policy brief of fish production enhancement in reservoir of Java
- S Triharyuni
- Husnah
- E S Kartamihardja
- C Umar
- Aisyah
Triharyuni, S., Husnah., Kartamihardja, E.S., Umar,
C., & Aisyah. (2017). Policy brief of fish production
enhancement in reservoir of Java. Research
Center for Fisheries. Final report. p. 86.
Study of limnological condition of Sermo reservoir on pra-Inundation
- B Triyatmo
Triyatmo, B. (2001). Study of limnological condition
of Sermo reservoir on pra-Inundation. Jurnal
Perikanan UGM III, (2), 1-9.
Estimation of the fish potential yield and state of fisheries of Malahayu Reservoir
- A Warsa
- K Purnomo
Warsa, A., & Purnomo, K. (2011). Estimation of the
fish potential yield and state of fisheries of
Malahayu Reservoir, Brebes Regency, Central Java
Province. J. Lit. Perikan. Ind, 17(4), 237-245.
Re-study on operational guidlines and echosounding measurement of Malahayu reservoir. Colaborative final report of Management of Water Resources Services
- S I Wahyudi
- E Santoso
Wahyudi, S.I., & Santoso, E. (2002). Re-study on
operational guidlines and echosounding
measurement of Malahayu reservoir. Colaborative
final report of Management of Water Resources
Services, Central Java and Unisula Semarang.