Limnetic Larval Fish in Northern Wisconsin Lakes

Abstract

The open water of two northern Wisconsin lakes was sampled for larval fish at night with fine-mesh conical townets. Those collected were identified to genus or species and enumerated. The majority of larval fish were captured in the limnetic region but a few never strayed from the littoral region.The seasonal changes of the limnetic species were similar for the two lakes and 3 years of study. Their abundance varied greatly from year to year but yellow perch, sunfish, and black crappies always dominated.

Food and feeding relationships of young fish in the first weeks after the beginning of exogenous feeding in Lake Opinicon, Ontario

“…The appearance of these could be corprevious workers (Faber 1967, Noble 1970 found related with the maturing of successive batches of that the larvae aggregate less during darkness. The eggs in the female ovaries (unpublished data).…”

Ontogenetic changes in the bathypelagic distribution of European perch fry Perca fluviatilis monitored by hydroacoustic methods

“…In contrast, no shoaling behaviour was observed in May. At this time the transparency of perch larvae (Ward & Robinson, 1974;Coles, 1981;Wang & Eckmann, 1994) is supposed to be sufficient adaptation for life in the pelagic zone of lakes and reservoirs, since they are thus invisible to predators (Faber, 1967). However, in their classical study, Thetmeyer & Kils (1995) have demonstrated that transparent organisms may also be highly visible and detectable by predators, due to light absorbance by opaque parts of the body or light scattered in the tissues, and Čech & Kubečka (2002) have suggested that the sinusoidal cyclic swimming of fish may be a mechanism effectively eliminating the advantage gained by transparent prey.…”

“…It is widely accepted that perch larvae migrate from near-shore spawning sites into the pelagic area soon after hatching (Whiteside et al, 1985;Post & McQueen, 1988;Treasurer, 1988;Wang & Eckmann, 1994) where, owing to their transparency (Ward & Robinson, 1974;Coles, 1981), they are probably less vulnerable to predation (Faber, 1967). Perch fry are reported to stay in the pelagic zone for a month, or longer, and after metamorphosis, when pigmented juveniles are more susceptible to predation in the offshore habitat, they return to the littoral area (Ward & Robinson, 1974;Coles, 1981;Whiteside et al, 1985;Treasurer, 1988).…”

Patterns of genetic structure of Eurasian perch (Perca fluviatilis L.) in Lake Geneva at the end of the spawning season

“…1), another gyre moves in a clockwise direction, i.e., currents return to the eastern part of the lake (Le Thi et al, 2012). After hatching, perch larvae are pelagic until reaching 2 cm in length (2 months) (Faber, 1967). Then, they move into the pelagic zone to feed on zooplankton (Wang and Eckman, 1994).…”