Biological Survey — Erie-Niagara Watershed 75 



Cladocera 



Acroperiis harpae. — In small pond draining into Cayuga creek; 

 found in stomach of unidentified fish captured in the Helgoland 

 trawl. 



Alona rectangula. — In mud washing, marginal zone; eaten by 

 yellow perch, carp, stone-roller, red-horse sucker, carp sucker, 

 Cayuga minnow, bullhead, goldfish and white-nosed sucker. 



Bosmina loiigirostris. — In marginal and littoral zones, more 

 abundant in the latter; eaten by goldfish, green-backed shiner, 

 Cayuga shiner. 



Bosmina longispina. — In littoral zone only and very scarce. 



Camptocercus rectirostris. — In marginal zone only; eaten by 

 red-horse sucker and the picconou. 



Ceriodaphnia piilchella. — In marginal zone only ; eaten by yel- 

 low perch. 



Ceriodaphnia reticulata. — In marginal zone only ; eaten by carp. 



Chydorus gihhus. — In mud washing marginal zone; eaten by 

 bullhead. 



Chydorus sphaericus. — In sand washing. Crystal Beach ; eaten 

 by red-horse sucker, carp sucker and bullhead. 



Daphnia longispina galeata. — In all 3 lake zones, most abundant 

 in lacustric zone; eaten by cisco and yellow perch. 



Daphnia longispina mendotae. — In all 3 lake zones, most 

 abundant in lacustric zone ; eaten by cisco and yellow perch. 



Daphnia longispina typica. — In all 3 lake zones, most abundant 

 in littoral zone ; eaten by cisco. 



Daphnia pidex. — Abundant in all 3 lake zones, but showing a 

 decided preference for the American shore in littoral zone ; eaten 

 by cisco, yellow perch, carp, carp sucker, lake herring, green- 

 backed shiner, trout perch, Cayuga shiner, white bass, log perch, 

 lake sheepshead. 



Daphnia retrocurva. — In all 3 lake zones, most abundant in 

 littoral zone ; eaten by cisco. 



Eiirycerciis lamellatus. — A bottom form in littoral zone ; eaten 

 by carp sucker and yellow perch. 



Holopedium gihherum. — Very rare in littoral zone; eaten by 

 cisco. 



Ilyocryptus sordidus. — Mud washings, marginal zone; eaten by 

 carp. 



Ilyocryptus spinifer. — Mud washings, marginal zone; eaten by 

 carp. 



Latona setifera. — Bottom form, lacustric zone. 



Leptodora kindtii. — In all 3 lake zones, even in mud washings, 

 marginal zone ; eaten by cisco and lake herring. 



Leydigia quadrangidaris. — In pond draining into Cattaraugus 

 creek ; eaten by bullhead and carp. 



Macrothrix laticornis. — In marginal zone only; eaten by carp 

 sucker and red-horse sucker. 



Moina rectirostris. — Mud w^ashings, marginal zone; eaten by 

 carp. 



