Abstract:
Tropics status is a picture of the fertility of the water, while fish production potential in an aquatic ecosystem is the ability of
these waters to produce fish. Research on tropics status and estimates of fish production in littoral waters Maninjau was
carried out in March and July 2013 with the purpose of the study to determine the tropics status of the lake littoral waters
and fish production estimates. The results show that in March 2013 the value of the average phosphorus level was 418 ±
55.40 mg / L, water transparency 1.7 ± 0.35 meters, chlorophyll-a levels of 256 ± 0.38 mg / L in order to obtain the average
value of the index status trophics of 76.61 ± 2.02 with the value of the trophic waters classified as severe. Meanwhile, in July
2013 the average value of 605 ± 4.79 Phosphorus levels ug / L, water transparency 1.3 ± 0.18 m, chlorophyll-a levels of
271.3 ± 2.65 mg / L in order to obtain the average value index of tropics status amounted to 78.62 ± 1.15 with the value of
the trophics waters classified as severe. The estimated value of fish production in March 2013 by an average of 45.51 ±
2.81 kg / ha / year and in July 2013 an average of 44.99 ± 2.96 kg / ha / year
