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2. The stock status of Lutjanus gibbus (Forsskal, 1775) in Kupang waters, East Nusa Tenggara

Author

Panggabean Anthony Sisco, Prihatiningsih, Taufik M., Nurdin E., Mahulette R.T., Nurulluddin, Chodrijah Umi, and Pane A.R.

Subjects
Environmental sciences, GE1-350
Abstract

Lutjanus gibbus is a commercially valuable demersal fish and a potential fish resource in the waters of Kupang. Morphometrics data were collected from 3,890 specimens landed at PPI Oeba from March 2019 through December 2020—analysis of data including population size structure, dynamics, mortality, and exploitation rate. Population dynamics, growth, and exploitation rates were analyzed using the FiSAT II and ELEFAN software programs. The most common fishing gear is a handline and a bottom longline used in one-day fishing. The results showed that the catch length was between 18 - 50 cm TL. The value of Lc (33,1 cmTL) was greater than that of Lm (28,66 cmTL). The growth parameter values showed asymptotic length (L) 52.50 cmTL, growth rate (K) 0.31 per year, and length at time zero (t0) -0.45. The natural mortality rate (M) of 1.18 exceeded the fishing mortality rate (F) of 0.87, the total mortality rate (Z) of 2.05, and the exploitation rate (E) of 0.42. The exploitation rate of Lutjanus gibbus in these waters indicates that the stock condition is below the optimal limit (underexploited) so that it can still be exploited with an additional effort equal to 16% of the current attempt while maintaining sustainability.

Published
2023
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30. Analysis of heavy metal lead (Pb) levels with Aas in cow's milk by giving cumin (Cuminum cyminum L.), white turmeric (Curcuma zedoaria Rosc.) and mango turmeric (Curcuma mangga Val.)

Author

Deddi Prima Putra, Nurdin E, and Amelia T

Subjects
Cuminum, Body weight, Animal science, food, Curcuma, Lactation, medicine, Animals, Curcuma mangga, Completely randomized design, Mangifera, biology, Traditional medicine, Plant Extracts, biology.organism_classification, food.food, medicine.anatomical_structure, Milk, Lead, Cattle, Female, Wet ashing, Curcuma zedoaria, Agronomy and Crop Science
Abstract

The aim of this study was to determine the effect of giving Cumin (Cuminum cyminum L.), White Turmeric (Curcuma zedoaria Rosc.) and Mango Turmeric (Curcuma mango Val.) on levels of heavy metals lead (Pb) in cow's milk produced. The study was conducted in West Java with experimental method in 16 Fries Holland dairy cows with lactation period of 2-4 months and lactation months of 3-4 months. The design used is simple randomized design with 4 treatments such as Group A (control/no treatment), Group B (Cumin 0.03% body weight), Group C (White Turmeric 0.02% body weight) and Group D (Mango Turmeric 0.06% body weight). Measurement of Pb levels in milk using the method of wet destruction, while Pb measurements on faeces using wet ashing method, by means of Atomic Absorption Spectrophotometry. Based on the researsch results showed that administration of Cumin, White Turmeric and Mango Turmeric have very real effect on reducing levels of heavy metals lead (Pb) in cow's milk produced, with a consecutive decrease 98.36, 99.33 and 99.37% and the very real effect on elevated levels of Pb in faeces by 68.01, 64.52 and 80.54%. Mango Turmeric is the best treatment of three treatment in decreasing lead level in milk.

Published
2014

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