FOOD OP THE SHORE PISHES OP CERTAIN WISCONSIN LAKES. 263 



Station 19; August 18; number examined, g. Length: Maximum, 36; minimum, 22; average, 28.2. 

 Food: Chironomid larvae, 2.2; Chironomus viridis pup^, 44.6; C. tentans, pupa, 5.3; Tanytarsus adult, 

 3.2; Chironomus viridis adult, 2.7; Cyclops, 5.6; Ceriodaphnia, 37. 



Summary. — Food: Insect larvK, 2.2; pupae, 49.9; adults, 4.9; copepods, 5.6; cladocerans, 37. 



Station 18; August 18; Number examined, 5. Length: Maximum, 33; minimum, 25; average, 28. 

 Food: Corethra larvae, 0.6; Chironomus viridis adult, 28.8; spider, 0.2; Cyclops, 11; Chydorus, 0.4; 

 Ceriodaphnia, 58; Daphnia hyalina, i. 



Summary. — Food: Insect larvse, 0.6; adult insects, 28.8; spider, 0.2; copepods, 11; cladocerans, 

 S9-4. 



Station 23, west of mouth of Yahara Canal in Lake Monona; August 19; number examined, 5. 

 Length: Maximum, 38.5; minimum, 21.5; average, 31.2. Food: Caterpillar, 1.4; Chironomus viridis 

 pups, 23; Tanytarsus adult, 3.5; Chironomus viridis adult, 33; C. digitatus adult, 2.6; C. tentans adult, 

 6; spider, 5; Cyclops, 0.6; Chydorus, 4.4; Pleiu-oxus, +; Daphnia hyalina, 20.4. 



Summary. — Food: Insect larvae, 1.4; pupae, 23; adults, 45.1; spider, 5; copepods, 0.6; cladocerans, 

 34.8. 



Station 24; August 19; number examined, 5. Length: Maximum, 41.5; minimum, 20.5; average, 

 28. Food: Chironomus viridis larvae, 5; Chironomus viridis pupae, 82.8; Chironomus viridis adults, 5.2; 

 C. tentans adults, 3.8; spider, 0.2; Cyclops, 2,6; Chydorus, 0.4. 



Summary. — Food insect larvae, 0.5; pupae, 82.8; adults, 9; spider, 0.2; copepods, 2.6; cladocerans, 0.4. 



Station 23, at mouth of river; August 19; number examined, 5. Length: Maximum, 41.5; minimum, 

 31.5; average, 31.5. Food: Corethra larvae, 3; Chironomus viridis pupae, 45; Tanytairsus adult, 5; Chirono- 

 mus viridis adult, 6; C. digitatus adult, 21; spider, i; Cyclops, i; Ceriodaphnia, 7; Eurycercus, 11. 



Summary. — Food: Insect larvae, 3; pupae, 45; adults, 32; spider, i; copepods, i; cladocerans, 18. 



Station 5; August 25; number examined, 4. Length: Maximum, 80.5; minimum, 30.3; average, 

 54.4. Food: Cyclops, 15.5; Chydorus, 7; Bosmina, 74.4; Camptocercus, 2.2; rotifers, 0.2; Closterium, 0.2. 



Summary. — Food: Copepods, 15.5; cladocerans, 83.6; rotifers, 0.2; alga, 0.2. 



Station 6; August 25; number examined, 6. Length: Maximum, 77; minimum, 25.5; average, 41.6. 

 Food: Chironomus viridis pupae, 52.5; C. tentans pupae, 14.4; Tanytarsus adult, 2.8; Chironomus viridis 

 adult, 6.6; Cyclops, 3; Ceriodaphnia, 19.6; Bosmina, 1.6. 



Summary. — Food: Insect pupae, 66.9; adults, 9.4; copepods, 3; cladocerans, 21.2. 



Grand summary for 1914 and IQIS- — Number examined, 100. Length: Maximum, 77; minimum, 

 11.5; average, 40.9. Food: Insect eggs, 1.4; insect larvae, 5.2; insect pupse, 16.4; adult insects, 28.3; 

 spiders, 0.3; mites, +; ostracods, +; copepods, 8.7; cladocerans, 32; rotifers, +; protozoans, +; algae, 4. 



The silverside is more of a "top-minnow" than the top-minnow {Fundulus diaphanus menona) 

 itself. The fact that its food contains 44.6 per cent adult insects and pupae, 40.7 per cent entomostracans, 

 and only a trace of ostracods can be interpreted in no other way. Forbes and Richardson (1908) stated 

 that this species feeds on animal plankton, chironomid larvae, land insects, and spiders. One fish 

 they examined had eaten a very small minnow. Baker (1916) found the stomachs of the fish he exam- 

 ined to contain a large percentage of insects and small amounts of Crustacea, Acarina and Bryozoa. 



Lepisosteus osseus (Linnaeus). Long-nosed gar, billfish. 



Station 28; September 14, 1915; number examined, 1. Length: 650. Food: Lepomis incisor, 100. 



Station 23; September 21; number examined, 1. Length: 218. Food: Lepomis incisor, 98; Simulium 

 vittatum larvae, 2. 



Station at Oconomowoc Lake; number examined, i. Length: 180. Food: Labidesthes sicculus, 

 90; Chironomus adults, 10. 



Station 22; July i, 1916; number examined, 5. Length: Maximimi, 652; minimum, 480; average, 

 577. Food: Fish, 40; minnow remains, 40; Enallagma antennatum nymphs, 20. 



Station 20; July 3; number examined, I. Length: 600. Food: Johnny darter, 100. 



Station 22; July 8; number examined, i. Length: 416. Food: Fish, 100. 



Summary for igi^ and IQ16. — Number examined, 10. Length: Maximum, 652; minimum, 180; 

 average, 494.9. Food: Fish, 88.8; insect larvae, 10.2; adult insects, i. 



The youngest gars examined fed somewhat on insects and larvae, but the chief food of all was small 

 fishes. Forbes and Richardson (1908) reported nothing but small fish for the food of this species. 



