scholarly journals Largemouth Bass in Ridge Lake, Coles County, Illinois

1954 ◽  
Vol 26 (1-6) ◽  
pp. 217-276 ◽  
Author(s):  
George W. Bennett
Keyword(s):  
Largemouth Bass ◽  
The State ◽  
Spawning Season ◽  
Warm Water ◽  
Warm Water Species ◽  
Water Species

The present publication is essentially a description of the culling technique of management and its effect upon the largemouth bass in Ridge Lake for an approximate 10-year period beginning with the spring of 1941 and ending after the bass spawning season but before the angling season of 1951. This technique, which is being employed in all recreational lakes built by the state of Illinois, may be depended upon not only to maintain good bass fishing over an indefinite period but to produce superior angling for fish of other warm-water species inhabiting these lakes.

Estimating optimal salinity and temperature of chaetognaths

2012 ◽  
Vol 92 (6) ◽  
pp. 1399-1407 ◽  
Author(s):  
Dong Zhang ◽  
Zhao-Li Xu
Keyword(s):  
Survey Data ◽  
East China Sea ◽  
Marine Organisms ◽  
Warm Water ◽  
East China ◽  
Optimal Temperature ◽  
The East China Sea ◽  
Warm Water Species ◽  
China Sea ◽  
Water Species

Determining optimal temperature and salinity for marine organisms is a challenge for marine ecologists because not every species can be easily maintained in the laboratory for testing the influence of environmental parameters. To find a simple method to estimate the optimal temperature and salinity for marine organisms based on survey data, a reciprocal quadratic yield-density model was used for determining the optimal temperature or salinity from abundance data for six pelagic Chaetognatha species. The data for the modelling were collected in four surveys in the East China Sea (23°30′–33°N 118°30′–128°E) from 1997 to 2000. According to both survey data and results from the models, we analysed qualitatively and quantitatively the ecological characteristics of those species. Estimated optimal temperatures and salinities are 17.3°C and 14.1‰ for Sagitta nagae, 20.3°C and 13.8‰ for S. bedoti, 24.9°C and 32.9‰ for S. enflata, 22.5°C and 16.5‰ for S. ferox, 24.5°C and 34.1‰ for S. pacifica and 17.3°C and 14.1‰ for S. pulchra, respectively. Three ecological groups were evident in the East China Sea: the neritic, warm temperate water species (S. nagae); the neritic, warm water species (S. pulchra, S. ferox and S. bedoti); and the oceanic, warm water species (S. enflata and S. pacifica). Our results validate that the model is applicable for describing the relationship between chaetognaths abundance and temperature or salinity.

Climate change and warm-water species at the north-western boundary of the Mediterranean Sea

2015 ◽  
Vol 36 (4) ◽  
pp. 897-909 ◽  
Author(s):  
Valeriano Parravicini ◽  
Luisa Mangialajo ◽  
Laure Mousseau ◽  
Andrea Peirano ◽  
Carla Morri ◽  
...  
Keyword(s):  
Climate Change ◽  
Mediterranean Sea ◽  
Warm Water ◽  
Western Boundary ◽  
Warm Water Species ◽  
The North ◽  
The Mediterranean ◽  
North Western ◽  
Water Species

Seasonal cycles of activity and inactivity in some hydroids from Virginia and South Carolina, U.S.A.

1990 ◽  
Vol 68 (3) ◽  
pp. 442-450 ◽  
Author(s):  
Dale R. Calder
Keyword(s):  
South Carolina ◽  
Water Temperature ◽  
Cold Water ◽  
Warm Water ◽  
Late Winter ◽  
Tissue Water ◽  
Warm Water Species ◽  
Temperature Regimes ◽  
Water Species ◽  
Cold Water Species

Hydroids investigated in estuaries of Virginia and South Carolina, USA, were characteristically seasonal in occurrence. Of 20 species studied in Virginia, 14 were active only during warmer months and 6 only during colder months of the year. Seven of the 18 species examined in South Carolina were active all year, whereas 9 were active only in warmer months and 2 only during colder months. Reflecting the differing temperature regimes of the two study areas, warm-water species were active for a longer period of time in South Carolina than in Virginia; cold-water species were active longer in Virginia than in South Carolina. Warm-water species commenced activity in late winter or spring at higher temperatures than those coinciding with hydranth regression in autumn or early winter. Activity in cold-water species began at lower temperatures than those observed at regression in spring. Correlations were apparent in the seasonality, water temperature tolerances, and latitudinal distribution of most species. Field observations and laboratory experiments demonstrated that a number of species survived unfavourable periods as dormant coenosarc in stems and stolons. With the return of favourable conditions, new growth began and hydranths were regenerated from dormant tissue. Water temperature is considered the prime factor influencing the seasonal activity–inactivity cycles of hydroids in the two study areas.

scholarly journals Warm-water species in the plankton off the English Channel entrance

1954 ◽  
Vol 33 (2) ◽  
pp. 345-346 ◽  
Author(s):  
J. H. Fraser
Keyword(s):  
Warm Water ◽  
English Channel ◽  
Warm Water Species ◽  
Channel Entrance ◽  
Water Species

Through the kindness of Dr L. H. N. Cooper of Plymouth I have been given the opportunity of examining some of the plankton samples taken by Surg.-Lt. P. Campbell, R.N.V.R., of H.M.S. Challenger. It is hoped that the results of these and later surveys will be published elsewhere in more detail, and in association with those made by the Scottish research vessels farther north, but two records of unusual interest are brought to notice here. The collections so far examined in detail were taken during April and May 1953, on a line of stations west of the English Channel, from 49° 39′ N., 3° 30′ W. to 47° 16′ N., 17° 52′ W. between 15 and 19 April, and on the return line from 47° 50′ N., 17° 40′ W. to 49° 28′ N., 5° 52′ W. between 25 and 28 May. They were made by 10 min. horizontal hauls at 30 fathoms depth.

Euphausiid invasion/dispersal in gulf stream cold-core rings

1983 ◽  
Vol 34 (4) ◽  
pp. 625 ◽  
Author(s):  
PH Wiebe ◽  
GR Flierl
Keyword(s):  
Gulf Stream ◽  
Cold Water ◽  
Warm Water ◽  
Dispersal Patterns ◽  
Near Surface ◽  
Warm Water Species ◽  
Living Species ◽  
Varied Response ◽  
Cold Core ◽  
Water Species

Invasion/dispersal patterns in the distribution and abundance of euphausiid species in four 2-8-month- old cold-core rings from the Gulf Stream suggest that several different physical exchange mechanisms are operating. The most important of these appear to be horizontal mixing in the mixed layer and exchange due to movement into or out of the trapped region at depth. A zone of minimum exchange is evident between 150 and 400 m. Changes in vertical distribution and abundance of warm-water species invading the ring environs suggest that only a few species, such as Stylocheiron carinatum, are able to penetrate and take advantage of the changing ring conditions in young- to middle-aged rings (2-8 months). Other near-surface warm-water species penetrate at slower rates regardless of whether they are vertical migrators (Euphausia brevis, E. hemigibba, E. tenera, Thysanopoda aequalis) or non-migrators (S. suhmii, S. abbreviatum). Deeper-living species such as S. afine, S. elongatum, Nematoscelis microps, and N. tenella, show minimal penetration of core waters in these four rings. Cold-water species expatriated in cold-core rings also show a varied response to ring decay, with some species disappearing rapidly-3-4 months (Thysanopoda longicaudata)-and others persisting for substantial periods-0.5-1 year (N. megalops, E. krohnii). Distribution of the latter two species indicates dispersal out beyond the ring core at the surface in the case of E. krohnii and at depths of 400-1 000 m in the case of N. megalops.

scholarly journals Large scale northward expansion of warm water species Skeletonema tropicum (Bacillariophyceae) in China seas

2012 ◽  
Vol 30 (4) ◽  
pp. 519-527 ◽  
Author(s):  
Dongyan Liu ◽  
Jinjie Jiang ◽  
Yan Wang ◽  
Yong Zhang ◽  
Baoping Di
Keyword(s):  
Large Scale ◽  
Warm Water ◽  
China Seas ◽  
Warm Water Species ◽  
Northward Expansion ◽  
Water Species

Larval development of a barnacle, Balanus spongicola (Cirripedia: Balanidae) reared in the laboratory

2001 ◽  
Vol 81 (5) ◽  
pp. 775-779 ◽  
Author(s):  
Olga M. Korn ◽  
Aleksey S. Elfimov ◽  
Natalya V. Skreptsova
Keyword(s):  
Larval Development ◽  
Thoracic Spine ◽  
Anterior Margin ◽  
Warm Water ◽  
Typical Pattern ◽  
Warm Water Species ◽  
Medium Length ◽  
Naupliar Development ◽  
Cephalic Shield ◽  
Water Species

The naupliar development of the barnacle Balanus spongicola is described, from larvae reared in the laboratory. The planktotrophic nauplii of B. spongicola reached the cyprid stage 11 days after hatching, at 20°C, and only eight days after hatching, at 25°C. Larval development includes six naupliar and one cyprid stage, following the typical pattern of the thoracican Cirripedia. Naupliar stages have a broad pear-shaped cephalic shield with a straight anterior margin and a pair of fairly short posterior spines in stages IV–VI. Dorsal and marginal spines are absent. Frontolateral horns are of medium length, directed forward from stage III. Small teeth on the median labral lobe found in some warm-water species are only weakly pronounced. The arrangement of abdominal spines and larval setation are in the usual balanoid pattern. The larvae of B. spongicola share some features with earlier described nauplii of Solidobalanus fallax, a non-native UK species inhabiting British waters. Balanus spongicola, however, possess more typical balanoid larvae. Its nauplii are more elongated (the cephalic shield is longer than broad). Thoraco-abdominal processes and posterior shield spines in B. spongicola are shorter than those in S. fallax. The abdominal process remains shorter than the dorsal thoracic spine until stage VI in B. spongicola but becomes nearly equal in S. fallax.

Warm-water Species in the Plankton off Newfoundland during Winter Months

Nature ◽  
1961 ◽  
Vol 191 (4794) ◽  
pp. 1216-1217 ◽  
Author(s):  
V. BAINBRIDGE
Keyword(s):  
Warm Water ◽  
Warm Water Species ◽  
Water Species

The Back Page: My Favorite Lesson: Angling for Enthusiasm Hooks Students

2010 ◽  
Vol 104 (4) ◽  
pp. 328
Author(s):  
Christopher P. Reisch
Keyword(s):  
New York ◽  
Great Lakes ◽  
New York State ◽  
Warm Water ◽  
Large Lake ◽  
York State ◽  
Warm Water Species ◽  
World Class ◽  
Water Species

Western New York State is known for many things, most notably snowfall. Less well known are its resources for year-round world-class fishing. In the Great Lakes tributaries that vein the landscape, warm-water species can be caught throughout the summer months. During the fall, winter, and spring months, these tributaries support large lake-runs of trout and salmon. If you live in western New York, as my students and I do, it is likely that you have angled.

Recent changes in abundance of intertidal barnacles in south-west England: a possible effect of climatic deterioration

1967 ◽  
Vol 47 (1) ◽  
pp. 81-95 ◽  
Author(s):  
A. J. Southward
Keyword(s):  
Warm Water ◽  
The Arctic ◽  
Warm Water Species ◽  
South West ◽  
Balanus Balanoides ◽  
Water Species ◽  
South West England

Annual surveys carried out in south-west England since 1949 show that the arctic-boreal barnacle, Balanus balanoides, which was uncommon or rare in i960, has increased greatly in abundance during the colder years since then. Its numbers now approach those recorded in the 1930's, and there has been a corresponding reduction in abundance of the warm-water species, Chthamalus stellatus.

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