Keywords: Banten, reproduction biology, eastern little tuna, Sunda Strait ABSTRAKIkan tongkol adalah ikan pelagis kecil yang memiliki nilai ekonomis tinggi. Upaya penangkapan ikan tongkol selama delapan tahun terakhir juga telah melebihi batas optimum. Untuk menjamin kelestarian sumberdaya ikan pelagis tersebut, perlu dilakukan suatu upaya pengelolaan. Salah satu informasi yang diperlukan dalam pengelolaan sumberdaya perikanan adalah biologi reproduksi ikan tongkol. Penelitian ini bertujuan untuk mengkaji aspek biologi reproduksi ikan tongkol. Pengambilan contoh dilakukan pada bulan April-Agustus 2015 dari hasil tangkapan nelayan. Uji t (α = 0,05) ) terhadap nilai b ikan tongkol jantan dan betina diperoleh pola pertumbuhan allometrik positif. Analisis Ratarata ukuran ikan pertama kali tertangkap lebih kecil untuk ikan tongkol betina dan jantan masingmasing adalah 308,37 mm dan 280,63 mm dibandingkan dengan ukuran pertama kali matang gonad ikan tongkol betina berkisar antara 407-408 mm dan jantan 438-440 mm. Ikan tongkol memijah secara bertahap atau secara parsial pada selang kelas 0,4741-0,5491 mm. Ikan tongkol memiliki potensi reproduksi yang cukup besar dengan fekunditas berada pada kisaran 17.814-560.792 butir telur dengan rata-rata 109.807 butir. Tingkat Kematangan Gonad ikan Tongkol didominasi oleh TKG I dan II yaitu fase belum matang. Nilai indeks kematangan gonad ikan Tongkol betina berkisar antara 0,0769-0,6879, sedangkan nilai IKG tongkol jantan berkisar antara 0,1913-0,3000.

Ikan tongkol adalah ikan pelagis yang memiliki nilai ekonomis dan ekologis penting. Upaya penangkapan ikan tongkol selama delapan tahun terakhir juga telah melebihi upaya optimum. Untuk menjamin kelestarian sumberdaya ikan pelagis tersebut, perlu dilakukan suatu upaya pengelolaan. Pendekatan kehati-hatian perlu dilakukan dalam rangka pembangunan berkelanjutan di bidang perikanan untuk memastikan bahwa eksploitasi perikanan ke depan masih tetap bekelanjutan. Dalam upaya pemanfaatan yang memperhatikan pendekatan kehati-hatian dengan model kriteria, diperoleh nilai rata-rata skor ikan tongkol sebesar 1,41 dengan kategori potensi keberlanjutan sedang. Dengan demikian, secara keseluruahan ikan tongkol sebagai kelompok ikan yang hidup bergerombol mempunyai potensi keberlanjutan sedang sampai tinggi. Dapat dijelaskan bahwa secara keseluruhan kondisi populasi tergolong sedang dengan status stok populasi yang sebagian terganggu sehingga populasi keberlanjutan menjadi sedang

Eastern little tuna is small pelagic fish that has high economic value. Fishing effort of the eastern little tuna for the last eight years have also exceeded the optimum level. To ensure the sustainability of the pelagic fish resources, it is necessary to perform the management efforts. This study was to observe reproductive Biology of the eastern little tuna, as one of the necessary information in the management of fishery resources. Fish -samples were collected from the catch of local fishermen in April-August 2015. Based on T test (α = 0,05), the eastern little tuna males and females showed positive allometric growth patterns. Average size of the first time caught fish for the female (308,37 mm) and male (280,63 mm) was smaller than that observed in those first time maturity gonads (ranging  407-408 mm for female and 438-440 mm for male).  The eastern little tuna spawn gradually or partially (partial spawner), and have high reproductive potential with fecundity ranged 17.814-560.792 eggs (average fecundity: 109.807) in fish of 285-630 mm body length. The gonad maturity level of the eastern Little Tuna is dominated by Gonad maturity level I and II,(immature). The value of gonad maturity for the female level is about 0,0769-0,6879 and the male is 0,1913-0,3000.

HighlightsThe main problem to ensure the good management in fisheries was multi species fishPrecautionary approach needed to get a good view of the important criteria in fisheries managementNeeded a multi criteria and index to make a final conclusion of the any criteriaNatural history and population dynamic parameter important input to sustainability indexValidation model in sunda strait as preliminary approach will help to get a good data and resultAbstractTorpedo scad species known are both economic and ecologic important pelagic fish that fishing catch tends to increase last a few decades. For sustainability, in the long term, needed a management strategy that complies with measurable fish population indicators. This effort is a part of the precautionary approach in fiseries management in related exploitation. This research was conducted in Labuan fishing port performed for more than 8 months and then analyzed with population parameters. Composite analysis by multi-criteria approaches found that the average score of Torpedo scad is 1.48 and then grouped as moderate sustainability. Schooling fish, including torpedo scad has been moderate until high sustainability levels. Overall population status in this area refer to moderate potential risk and needs a precautionary approach on management.

This research aimed to examine the water quality of the Komering River Kayuagung city based on physical and chemical parameters. The research was conducted from May - June 2021. Water sampling was carried out by purposive sampling by determining 4 observation stations, namely little human activity areas (station 1), sand mining areas (station 2), human activity areas (station 3) and fish farming in cages areas (station 4). Sampling was carried out by several parameters measured i.e. temperature, transparency, current velocity, TDS, pH, dissolved oxygen (DO) and BOD. The measurement results were then compared with the criteria for Class I river water quality standards according to the South Sumatra Governor Regulation No. 16 of 2005. Based on the results of the analysis, it was found that the temperature, TDS, BOD generally stiil in the first, second and third class water quality standards. pH and DO values are exceed the first class quality standards.