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High-quality marine ecosystems are free from global trending pollutants’ (GTP) contaminants. Accuracy and caution are needed during the exploitation of marine resources during marine tourism to prevent future ecological hazards that cause chain effects on aquatic ecosystems and humans. This article identifies exposure to GTP: microplastic (MP); polycyclic aromatic hydrocarbons (PAH); pesticide residue (PR); heavy metal (HM); and medical waste (MW), in marine ecosystems in the marine tourism area (MTA) area and Barrang Caddi Island (BCI) waters. A combination of qualitative and quantitative analysis methods were used with analytical instruments and mathematical formulas. The search results show the average total abundance of MPs in seawater (5.47 units/m3) and fish samples (7.03 units/m3), as well as in the sediment and sponge samples (8.18 units/m3) and (8.32 units/m3). Based on an analysis of the polymer structure, it was identified that the dominant light group was MPs: polyethylene (PE); polypropylene (PP); polystyrene (PS); followed by polyamide-nylon (PA); and polycarbonate (PC). Several PAH pollutants were identified in the samples. In particular, naphthalene (NL) types were the most common pollutants in all of the samples, followed by pyrene (PN), and azulene (AZ). Pb+2 and Cu+2 pollutants around BCI were successfully calculated, showing average concentrations in seawater of 0.164 ± 0.0002 mg/L and 0.293 ± 0.0007 mg/L, respectively, while in fish, the concentrations were 1.811 ± 0.0002 µg/g and 4.372 ± 0.0003 µg/g, respectively. Based on these findings, the BCI area is not recommended as a marine tourism destination.

Gunarto, Sulaeman and Herlinah. 2019. The Preference Size Of Male Mud Crab, Scylla tranquebarica at Success Mating With Female , Scylla olivacea in Controlled Tanks. Aquacultura Indonesiana, 20(2) : 93-101. Interspecific hybridization of mud crab Scylla spp has been successfully conducted in controlled tanks. However, there is no information yet available about the male size S. tranquebarica is capable to copulate with female of S. olivacea. The objectives of the experiment is to find out the male size of S. tranquebarica that willingly copulated with newly molted female of S. olivacea. Twelve individual of adolescent female of S. olivacea were reared individually in the conical fibreglass tanks each of 500 L volume. In another tank, 12 adult male S. tranquebarica with various size (200-500g/ind.) were also prepared. The crabs fed with chopped trash fish in the morning (7.00 am) and afternoon (17.00 pm) at 5% of the total crab biomass. Each newly molted female is transfered to the prepared copulation tank where three male of different size have been placed and allow them to mate and freely copulated with the female. The size of copulated crabs (body weight, carapace with, and carapace length) were recorded. The female sizes were measured before and after molting, whereas, the male sizes were measured soon after mating process has finished. Post mating, the female crab then reared individually in the recirculating tank system until mature and spawned. The result showed that male S. tranquebarica with individual weight of >300g are preferable to copulate with female S. olivacea, where in contrary no male crab of the size <300g were successfully mate. The duration from mating to gonad maturity stage IV for the hybridized S. olivacea in this study ranges between 59-103 days.

A quality marine ecosystem if it is free from GTP contaminants. Accuracy and caution are needed in the exploitation of marine resources as marine tourism destinations so that in the future, there will be no ecological hazards that cause chain effects, not only on aquatic ecosystems but also on humans. This article identifies exposure to GTP (MP, PAH, PR, HM, MW) in marine ecosystems in the MTA area and BCI waters. The combination of qualitative and quantitative analysis methods uses a combination of analytical instruments and mathematical formulas. The search results show the average total abundance of MP in seawater and fish samples (5.47 units/m3) and (7.03 units/m3), respectively, while in sediment and sponge samples (8.18 units/m3) and (8.32 units/m3). Based on the analysis of the polymer structure, it was identified that the dominant light group MP (PE, PP and PS), followed by PA and PC. Several PAH pollutants were identified in the samples, especially NL types found in all samples, followed by PN and AZ. BCI sea waters are suspected to be exposed to MW and PR. Pollutants of Pb+2 and Cu+2 around BCI were successfully calculated with average concentrations in seawater 0.164 mg/L and 0.294 mg/L, respectively, while in fish, 1.8110 &micro;g/g and 2,452 &micro;g/g, respectively. Based on these findings, the BCI area is not recommended as a marine tourism destination.

ABSTRAKKepiting bakau Scylla olivacea merupakan salah satu komoditas perikanan yang memiliki nilai ekonomis yang sangat tinggi. Kendala yang dihadapi dalam kegiatan perbenihan kepiting bakau adalah masih tingginya tingkat mortalitas. Tujuan penelitan untuk mengevaluasi pengaruh hormon ecdyson terhadap sintasan dan periode moulting pada larva kepiting bakau Scylla olivacea. PENDAHULUANKepiting bakau Scylla olivacea merupakan salah satu komoditas perikanan yang memiliki nilai ekonomis yang sangat tinggi. Kepiting bakau memiliki nilai gizi yang tinggi dan kualitas cita rasa yang disukai konsumen baik di dalam negeri maupun pasaran internasional. Seiring meningkatnya permintaan konsumen, membawa konsekuensi terhadap tuntutan pengembangannya yakni salah satunya melalui budidaya kepiting bakau secara intensif. Kepiting bakau telah dibudidayakan di beberapa daerah di Indonesia, akan tetapi kendala utama yang dihadapi adalah ketersediaan benih yang terbatas. Salah satu solusi yang dapat dilakukan untuk mengatasi ketersediaan benih guna meningkatkan produksi kepiting bakau adalah melalui kegiatan perbenihan.