The high number of tourists visit to Malang shows that Malang is still one of the favourite tourist destinations. Two of them are Kampung Wisata Jodipan and Kampung Biru. The existence of tourism-based villages provides economic, socio-cultural, and ecological impacts. Development and environment have interrelated, reciprocal, and very close interactions. This research was ex post facto which aimed to determine the correlation of environmental concern and age, and also to compare the environmental concern in two tourism villages in Malang City. The sampling was conducted using random sampling. Data collection was carried out by observation, interview, and questionnaires about environmental concern questionnaires to residents in both tourism villages. Data were analyzed by descriptive analysis and Pearson correlation. The results showed that the age and concern of the community in Kampung Wisata Jodipan did not correlate, with p = 0.926 > α = 0.05, which means there was no relationship between the age of the community and environmental concern. In Kampung Biru, age also does not correlate with community concern with p = 0.181 > α = 0.05, which means there is no relationship between the age of the community and environmental concerns.
The white spotted rabbitfish (Siganus canaliculatus Park, 1797) is a locally important foodfish across much of Indonesia. This study aimed to support population dynamics-based fisheries management of white spotted rabbitfish stocks in the Makassar Strait and Gulf of Bone through providing data on age classes (cohorts), growth, mortality, and exploitation rate. Field data were collected over the year from February 2017 to January 2018. A total of 2248 white spotted rabbitfish (1810 males and 438 females) were collected from the Makassar Strait and 1686 (1277 males and 409 females) from the Gulf of Bone. The fish were measured (L = total length in mm), and all analyses were implemented in FISAT II. Cohorts were determined by sex based on monthly length-frequency data using the Bhattacharya method. The growth factor K and asymptotic length L∞ of white spotted rabbitfish in the Makassar Strait were K = 0.42/yr and L∞ = 211.98 mm with t0 = -0.250 yr for males and K = 0.43/yr, L∞ = 215.00 mm and t0 = -0.386 yr for females. In the Gulf of Bone the values were K = 0.42/yr, L∞ = 211.98 cm and t0 = -0.250 yr for males and K = 0.43/yr, L∞ = 215.00 mm and t0 = -0.386 yr for females. Mortality parameters of white spotted rabbitfish in the Makassar Strait were total mortality Z = 1.70/yr, natural mortality M = 0.76/yr, F = 0.94/yr giving an exploitation rate of E = 0.55 for males, while for females Z = 1.77/yr, M = 0.84/yr, F = 0.93/yr and E = 0.53. In the Gulf of Bone, for male white spotted rabbitfish Z = 1.78/yr, M = 0.60/yr, F = 1.18/yr and E = 0.67, while for females Z = 2.42/yr, M = 0.60/yr, F = 1.82/yr and E = 0.75/yr. These data indicate heavy fishing of both stocks, most likely at unsustainable levels.
Tempe, Sidenreng and Lapompakka lakes have potential fisheries. One species mostly consumed is Tawes, Barbonymus gonionotus. Household waste, and industrial and agricultural activities around the lake are suspected to be the source of metal pollution to these lakes and their organism, particularly of lead (Pb) and cadmium (Cd). This study aim to analyze the lead (Pb) and cadmium (Cd) concentration in Tawes, Barbonymus gonionotus and to determine whether this Tawes species is still safe to be consumed. Total samples collected were 54 fish. The Pb and Cd concentration was determined from the fish flesh and analyzed using the Atomic Absorption Spectrophotometry (AAS) method and presented descriptively. The results showed that the concentrations of Pb and Cd in this species of all three lakes were not detected. Based on the quality standards for metal contamination of Pb and Cd in the fish and its processed products according to SNI (2011), the concentrations of Pb and Cd in the three lakes have not exceeded the standard, meaning that Tawes fish is still suitable for consumption.
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