lago Calderas 
Lago Calderas 
idtuds ef is located about 10 kilometers south of Laguna de Amatitlan, at an 
780 meters. It covers about 24 hectar 
es and is oval in outline. It 
pea tarel ae Be pd at 1:00 p.m., the air was 21 degrees Centigrade cael Ae ae 22 
gel pat oy = Maa eee 19 parts per million, and methyl orange alkalinity, 
° : 8 
Sain Airinedh. £6 ln cab oundings, but local residents informed us that the 
The pepesca (Astyanax), pescadito (Poecilistes). and | 
) ) the s (Mollienesia 
Profundulus) were taken in the seine hauls. One mojarra is said ae eines tt 
the fishes were reported to have been introduced from Laguna Amatitlan. 
& narrow margin of aquatic vegetation i 
Genera of plants represented 4 on 1s present around most of the lake shore. 
aad Bichhorria. are Brasenia, Typha, Scirpus, Potamogeton, Chara, Myriophyllun, 
In the event that a decision is reached for 
planting exotic species, the black 
crappie (Pomoxis nigro-maculatus) and the largemouth bass (Micropterus salmoides are 
recommended, for it is believed that these species would provide more food than any other. 
‘ The guapote (Cichlasoma motaguense) would be desirabl 
nix die-las® GEE efiacds sreenee motaguense) able as a food fish and to supply forage 
Laguna de Pino 
Laguna de Pino, with an area of about 20 hectares, is located along the Pan- 
American Highway 45 kilometers southeast of Guatemala City, at an altitude of 1,040 meters. 
It is shaped somewhat like a frying pan, with the handle representing the upper basin, and 
the pan the lower basin. The upper basin is shallow, reaching depths of one and one-fifth 
meters. The bottom of the lower basin descends sharply at the outer margin of the tules 
(Typha and Scirpus) to two meters, and then more gradually to depths of three and three- 
fifths meters. It is estimated that half of the lake is less than two meters in depth. 
The continuous marginal bed of tules occupies a strip averaging about three meters in width. 
Potamogeton occurs in limited amounts in the shallow areas of the small coves. 
At 3:00 p.m., March 31, 1946, the air was 30 degrees Centigrade; and the surface 
and bottom waters, 28 degrees. On April 5, 1947, at 2:30 p.m., the air was 27 degrees; the 
surface and bottom waters, 26 degrees. The alkalinity on March 31, 1946, was as follows: 
phenolphthalein, 31; methyl orange, 200 parts per million. Throughout the dry season, the 
alake is turbid with a heavy growth of microscopic plants and animals. The Secchi disk (20 
centimeters in diameter) disappeared at one and one-half meters. 
The lake contains numerous small fishes of the families Characinidae, Cyprino- 
dontidae, Poeciliidae, and,one mojarra, Cichlasoma guttulatum. The mojarra reaches 275 
millimeters in length, but it is not utilized to a great extent. The fishermen report that 
it will not take a hook readily. The lake is extremely rich in fish foods, and should 
furnish an abundance of food and game fishes if more desirable species are introduced. 
For the development of the fishery resource in this lake, the introduction of the 
following species is recommended: black crappie (Pomoxis o-maculatus), channel catfish 
(Ictalurus lacustris punctatus), guapote (Cichlasoma Saaeeee) » and the largemouth bass 
(Micropterus salmoides). 
Lago Lemoa 
| Lago Lemoa is located in San Sebastian Lemoa, 12 kilometers southwest of Santa 
Cruz QuichS. It has an area of about 12 hectares, and lies at an altitude of approximately 
2,000 meters. ‘The depth may be reduced as mch as three to four meters, and the area about 
17 per cent, due to evaporation during the dry season. The lake does not Imve an outlet, 
but the surrounding area drains into the Rio Negro, and is a part of the Usumacinta drain- 
age. A heavy growth of phytoplankton permitted one to see objects down to a depth of about 
38 centimeters. Marginal beds of Potamogeton, Chara, and grasses (Gramineae), three to 
mn 
