Ecology of young-of-the-year fishes in Severn Sound, Lake Huron

1994 ◽  
Vol 72 (11) ◽  
pp. 1887-1897 ◽  
Author(s):  
John K. Leslie ◽  
Charles A. Timmins
Keyword(s):  
Open Water ◽  
Abundant Species ◽  
Lake Huron ◽  
Lepomis Gibbosus ◽  
Alosa Pseudoharengus ◽  
Exposed Rock ◽  
Heterogeneous Habitats ◽  
Young Of The Year ◽  
Area Of Concern ◽  
Fish Species Diversity

Seasonal occurrence, distribution, density, and size were estimated for young-of-the-year fishes collected in altered and unaltered littoral areas of eastern Severn Sound, Lake Huron, a Great Lakes "Area of Concern." Fishes were sampled with nets and seines (0.3-mm mesh) in open water and at the shore from May to October, 1989, 1990, and 1991. The highly diverse young-of-the-year fish community reflects unfragmented heterogeneous habitats that range from exposed rock and sand shores to densely vegetated embayments and marshes. Fishes (89 000 specimens) were represented by 9 reproductive guilds, 16 families, and 38 taxa. Cyprinids, centrarchids, and percids dominated collections; common and abundant species included Perca flavescens (56% of total catch), Lepomis gibbosus (18%), and Alosa pseudoharengus (8%). Generally, fewer species at lower mean densities occurred in unaltered habitats than in altered areas. Large spatial and temporal differences were observed in peak density and mean total lengths of most species collected on the same date at several sites. Fish species diversity and abundance were consistently highest in mixed submersed plants and lowest in open water and on exposed shores.

Abundance and Spatio-Temporal Distribution of Young-of-the-Year Fishes in an Altered Embayment of Lake Huron

1995 ◽  
Vol 30 (4) ◽  
pp. 713-732 ◽  
Author(s):  
J.K. Leslie ◽  
C.A. Timmins
Keyword(s):  
Temporal Distribution ◽  
Abundant Species ◽  
Lake Huron ◽  
Lepomis Gibbosus ◽  
Alosa Pseudoharengus ◽  
Beach Seine ◽  
Emergent Macrophytes ◽  
Young Of The Year ◽  
Spatio Temporal ◽  
Fish Habitats

Abstract The ecology of young-of-the-year fishes in a small (318 ha) perturbed embayment in Severn Sound (Lake Huron) was studied for the period May to October from 1990 to 1993. Fishes were collected with a beach seine (0.3-mm mesh) and ichthyoplankton nets (0.5-mm mesh). The taxocene (17,500 specimens collected) consisted of 17 families and 31 taxa, and represented 9 ecological guilds. Most (24) taxa were found at the shore, whereas 12 taxa were collected in limnetic areas. Fish habitats were diverse and disjunctive; most fishes were associated with mixed submersed and emergent macrophytes. Relatively few fishes inhabited severely altered shoreline areas that lacked cover from predators. The assemblage may be considered as percid-centrarchid-cyprinid, with Alosa pseudoharengus sporadically co-dominant. The most common and abundant species were Lepomis gibbosus (30% of total catch) and Perca flavescens (24%).

Distribution, density, and growth of young-of-the-year fishes in Mitchell Bay, Lake St. Clair

1993 ◽  
Vol 71 (6) ◽  
pp. 1153-1160 ◽  
Author(s):  
J. K. Leslie ◽  
C. A. Timmins
Keyword(s):  
Distribution Density ◽  
Submerged Macrophytes ◽  
Larval Fish ◽  
Lepomis Gibbosus ◽  
Alosa Pseudoharengus ◽  
Dorosoma Cepedianum ◽  
Beach Seine ◽  
Peak Density ◽  
Young Of The Year ◽  
Emerald Shiner

Thirty-eight taxa of young-of-the-year fishes were collected with a beach seine and plankton nets in Mitchell Bay, a shallow, densely vegetated embayment on Lake St. Clair, from April to October, 1983, 1984, and 1990. The ecosystem of the bay and adjacent land has been altered by agricultural, industrial, and recreational development for more than a century. Although taxa were numerous, most species were rare or uncommon in collections. The assemblage of larval fish consisted primarily of brook silverside (Labidesthes sicculus), pumpkinseed (Lepomis gibbosus), spottail shiner (Notropis hudsonius), emerald shiner (Notropis atherinoides), alewife (Alosa pseudoharengus), and gizzard shad (Dorosoma cepedianum). Many species were distributed in or near submerged macrophytes at the shore. The species most abundant were pumpkinseed, which reached peak density (11 931 young of the year/100 m3) in late June 1990, and brook silverside (1363 young of the year/100 m3) in late June 1984.

Diversity and abundance of cichlids in Ikere Gorge Reservoir, Iseyin, Oyo State, Nigeria

2021 ◽  
Vol 18 (1) ◽  
pp. 52-56
Author(s):  
S.O. Ajagbe ◽  
R.O. Ajagbe ◽  
O.S. Ariwoola ◽  
F.I. Abdulazeez ◽  
O.O. Oyewole ◽  
...  
Keyword(s):  
Fish Species ◽  
Riparian Forest ◽  
Abundant Species ◽  
Freshwater Ecosystems ◽  
Freshwater Species ◽  
Fishing Villages ◽  
Gorge Reservoir ◽  
Commercially Important ◽  
Sarotherodon Galilaeus ◽  
Fish Species Diversity

Cichlids are highly abundant and commercially important fish in freshwater ecosystems in Nigeria. This study examined the diversity and abundance of cichlids in Ikere Gorge Reservoir. Four fishing villages were randomly selected from 12 fishing villages in Ikere Gorge Reservoir as sampling sites. Cichlids were sampled randomly and examined from fishermen catch in each selected fishing village; were identified with appropriate keys; the weight and abundance of the catches were recorded. The data obtained was subjected to descriptive statistical analysis using SPSS (Version 20.0) software to determine the abundance of fish species. Fish species diversity was carried out by using Palaeontological Statistics (PAST). Eight species of cichlids were sampled in Ikere Gorge but Sarotherodon galilaeus was the most abundant species while the least abundant species was Pelmatolapia mariae. It was observed that, cichlids were  abundant in rainy season than in the dry season. Likewise, cichlids were abundant in Ikere-gorge reservoir but they have low diversity. This may be as a result of unsustainable fishing pressure and deforestation of riparian forest and sedimentation in Ikere-gorge reservoir. Therefore, to maintain sustainable fishing activities and improve cichlids population in Ikeregorge reservoir, unsustainable activities in and around Ikere Gorge reservoir should be put under control. Keywords: Cichlidae; freshwater species; dominant; Sarotherodon galilaeus; Pelmatolapia mariae.

Planktivory by alewife (Alosa pseudoharengus) and rainbow smelt (Osmerus mordax) on microcrustacean zooplankton and dreissenid (Bivalvia: Dreissenidae) veligers in southern Lake Ontario

1995 ◽  
Vol 52 (5) ◽  
pp. 925-935 ◽  
Author(s):  
Edward L. Mills ◽  
Connie Adams ◽  
Robert O'Gorman ◽  
Randall W. Owens ◽  
Edward F. Roseman
Keyword(s):  
Laboratory Experiments ◽  
Lake Ontario ◽  
Osmerus Mordax ◽  
Field Observations ◽  
Alosa Pseudoharengus ◽  
Rainbow Smelt ◽  
Consumption Rates ◽  
South Shore ◽  
Young Of The Year ◽  
Veliger Larvae

The objective of this study was to describe the diet of young-of-the-year and adult alewife (Alosa pseudoharengus) and rainbow smelt (Osmerus mordax) in nearshore waters coincident with the colonization of Lake Ontario by Dreissena. Laboratory experiments and field observations indicated that alewife and rainbow smelt consumed dreissenid veligers and that the veligers remained intact and identifiable in the digestive tract for several hours. Dreissenid larvae were found in field-caught alewife and rainbow smelt in August 1992, even though veliger densities were low (<0.1/L). Zooplankton dominated the diet of all fish and veliger larvae were <0.1% of the biomass of prey eaten by these fish. Density of veligers and the distribution of settled dreissenids declined from west to east along the south shore of Lake Ontario. Based on veliger consumption rates we measured and the abundance of veligers and planktivores, we conclude that planktivory by alewife and smelt in the nearshore waters of Lake Ontario did not substantially reduce the number of veligers during 1991–1993. However, our results indicate that if the density of veligers in Lake Ontario decreases, and if planktivores remain abundant, planktivory on veliger populations could be significant.

Effects of a native crayfish (Orconectes virilis) on the reproductive success and nesting behavior of sunfish (Lepomis spp.)

2004 ◽  
Vol 61 (11) ◽  
pp. 2135-2143 ◽  
Author(s):  
Nathan J Dorn ◽  
Gary G Mittelbach
Keyword(s):  
Reproductive Success ◽  
Lepomis Macrochirus ◽  
Lepomis Gibbosus ◽  
Orconectes Virilis ◽  
Negative Effects ◽  
Fish Prey ◽  
Natural Lakes ◽  
Successful Reproduction ◽  
Young Of The Year ◽  
Native Crayfish

While crayfish are traditionally considered fish prey, they are capable of feeding on substrate-bound fish eggs and their introductions have been blamed for the decline in fish populations in Europe and North America. To investigate their potential effects on fish reproductive success we measured the effects of a native crayfish (Orconectes virilis) on the reproductive success of two substrate-nesting sunfish, pumpkinseed (Lepomis gibbosus) and bluegill (Lepomis macrochirus), in replicated pond experiments. Crayfish were observed feeding on eggs in both experiments. Crayfish presence delayed successful reproduction by pumpkinseeds in densely vegetated ponds, resulting in lower young-of-the-year biomass in ponds with crayfish. In the second experiment, with bluegills in less-vegetated ponds, crayfish prevented successful reproduction entirely. However, when we added crayfish-proof exclosures to the crayfish ponds late in the summer, bluegills located the crayfish-free habitat and successfully reproduced inside the exclosures (1 month after first successful reproduction in control ponds). The results of these experiments demonstrate the potential strong negative effects of crayfish on sunfish reproduction and suggest that the spatial distribution of crayfish and other egg predators may influence fish nesting behaviors and habitat choices. Further studies are needed to determine the magnitude of crayfish effects in natural lakes and ponds where sunfish and crayfish co-occur.

scholarly journals Effects of urbanization of coastal watersheds on growth and condition of juvenile alewives in New England

2020 ◽  
Vol 77 (3) ◽  
pp. 594-601 ◽  
Author(s):  
Rita Monteiro Pierce ◽  
Karin E. Limburg ◽  
Daniella Hanacek ◽  
Ivan Valiela
Keyword(s):  
Land Cover ◽  
New England ◽  
Urban Land ◽  
Trophic Levels ◽  
Alosa Pseudoharengus ◽  
Urban Land Cover ◽  
Coastal Watersheds ◽  
Weight Condition ◽  
Young Of The Year ◽  
Dominant Influence

Alosa pseudoharengus (alewife) has declined throughout New England. A factor that may be responsible for such stock reductions is urbanization of watersheds discharging into alewife nursery ponds. We found that young-of-the-year (YOY) alewife length, weight, condition factor, and growth rate decreased in relation to increased urban land cover on watersheds of nine Massachusetts and Maine ponds. The watersheds ranged from 3% to 60% urbanized land cover. YOY δ15N increased significantly in proportion to urbanized land cover on watersheds, suggesting a concrete link between watershed land cover and YOY alewife metrics, which is in agreement with previous knowledge that N discharges from more urbanized watersheds bear higher δ15N. The New England results confirmed results across a wide latitudinal gradient that suggested that the size of YOY alewife decreased as urban land cover on watersheds increased. The dominant influence of urban land cover in the YOY is highlighted by the fact that YOY alewife from ponds with the highest percentage of urban cover reached δ15N as high as that of adult spawners migrating from the ocean, who feed at higher trophic levels.

Responses of Walleye (Stizostedion vitreum vitreum) and Yellow Perch (Perca flavescens) Populations to Removal of White Sucker (Catostomus commersoni) from a Minnesota Lake, 1966

1977 ◽  
Vol 34 (10) ◽  
pp. 1633-1642 ◽  
Author(s):  
Fritz H. Johnson
Keyword(s):  
Species Interactions ◽  
Standing Crop ◽  
Yellow Perch ◽  
Perca Flavescens ◽  
Food Competition ◽  
Community Response ◽  
Stizostedion Vitreum ◽  
Catostomus Commersoni ◽  
Young Of The Year ◽  
Fish Species Diversity

In a northeastern Minnesota lake subject only to sportfishing, removal of 85% of the estimated standing crop (34 kg/ha) of adult white suckers, Catostomus commersoni in 1966 was followed by marked changes in community structure and interrelations. During 7 yr alter the removal: catch indices for adult suckers remained far below those before the sucker removal but juvenile suckers increased about 17-fold; yellow perch, Perca flavescens, increased about 15-fold; walleye Stizostedion vitreum vitreum, standing crop increased about one-third; mayflies increased in diet of adult perch and smaller invertebrates decreased; micro-crustaceans increased in diet of young-of-the-year and juvenile perch; young-of-the-year perch increased in diet of adult walleye; walleye angling yield increased from an average of 3.0 kg/ha before the removal to an average of 4.9 kg/ha in 1970–73; the rate of exploitation of adult walleye did not change with increase in angling effort; and the increased walleye harvest consisted mostly of fish recruited to the catch during the fishing season. The average annual harvest of walleye in 1970–73 exceeded estimated potential production for all fish by 81.5% and probably cannot be sustained. Removal of white suckers from lakes with limited fish species diversity appears to benefit percid populations. Key words: Percidae, species interactions, (Stizostedion vitreum vitreum), Perca flavescens, Catostomus commersoni, harvests, community response, community ecology, food, competition

Cage aquaculture and water-quality changes in the LaCloche Channel, Lake Huron, Canada: a paleolimnological assessment

2004 ◽  
Vol 61 (9) ◽  
pp. 1691-1701 ◽  
Author(s):  
Saloni Clerk ◽  
Daniel T Selbie ◽  
John P Smol
Keyword(s):  
Water Quality ◽  
Nutrient Loading ◽  
Fish Farming ◽  
Lake Huron ◽  
Quality Changes ◽  
Low Oxygen ◽  
Hypolimnetic Oxygen ◽  
Cage Aquaculture ◽  
Relative Abundances ◽  
Area Of Concern

Lake eutrophication due to cage aquaculture is an area of concern in Ontario; however, without knowledge of pre-impact conditions, it is difficult to determine the extent and magnitude of environmental change. Paleolimnological techniques were used to estimate water-quality conditions prior to, during, and briefly following aquaculture operation in the LaCloche Channel, Lake Huron. Past oxygen and nutrient levels were inferred from assemblages of chironomids and diatoms, respectively, to determine whether recent low-oxygen and nutrient-rich conditions were related to cage aquaculture in operation from 1989 to 1998. Chironomid assemblages exhibited trends consistent with decreased hypolimnetic oxygen levels, with reductions in oxic-type profundal taxa and increased relative abundances of littoral communities. Diatom assemblages reflected a period of nutrient enrichment by increased relative abundances of meso-eutrophic taxa. Improvements in water quality are inferred from assemblages of diatoms in surface sediments, which may correspond to the cessation of fish-farming activities in 1998. In contrast, no sign of deep-water oxygen recovery is recorded by chironomids. These trends are consistent with eutrophication, and suggest that the LaCloche Channel was sensitive to nutrient loading from the cage-aquaculture operation. This study demonstrates the potential of using paleolimnological techniques to track water-quality changes associated with cage farming.

Assessment of Top-Down and Bottom-Up Controls on the Collapse of Alewives (Alosa pseudoharengus) in Lake Huron

Ecosystems ◽  
2016 ◽  
Vol 19 (5) ◽  
pp. 803-831 ◽  
Author(s):  
Yu-Chun Kao ◽  
Sara A. Adlerstein ◽  
Edward S. Rutherford
Keyword(s):  
Lake Huron ◽  
Alosa Pseudoharengus ◽  
Top Down ◽  
Bottom Up

Entrainment of Larval Fish by the Douglas Point Generating Station, Lake Huron, in Relation to Seasonal Succession and Distribution

1979 ◽  
Vol 36 (1) ◽  
pp. 37-41 ◽  
Author(s):  
John R. M. Kelso ◽  
John K. Leslie
Keyword(s):  
Yellow Perch ◽  
Larval Fish ◽  
Seasonal Succession ◽  
Lake Huron ◽  
Plant Distribution ◽  
Entrainment Rate ◽  
Osmerus Mordax ◽  
Alosa Pseudoharengus ◽  
Rainbow Smelt ◽  
Early Fall

Larval fish were sampled by net in Lake Huron and the Douglas Point generating station throughout spring, summer, and early fall 1975. Dominance shifted from fourhorn sculpin (Myoxocephalus quadricornis) to rainbow smelt (Osmerus mordax) then to ale-wife (Alosa pseudoharengus) from late April to late September. Entrainment of the major species paralleled dominance and abundance observed in the lake, but yellow perch (Perca flavescens), brook stickleback (Eucalia inconstans), and slimy sculpin (Cottus cognatus) caught in the lake — each ranging from 5 to 25% of the total catch — were not entrained. Conversely, white sucker (Catostomus commersoni) was entrained but not captured in the lake. Size of individuals entrained, upper limit approx. 40 mm, paralleled size of individuals in the lake. Vertical distribution, and thus proximity to the submerged intake, greatly influenced entrainment rate. Key words: larval fish, entrainment, power plant, distribution, abundance.

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