Density and agonistic behaviour in young-of-the-year largemouth bass (Micropterus salmoides)

1984 ◽  
Vol 62 (8) ◽  
pp. 1454-1455 ◽  
Author(s):  
Ian A. Fleming ◽  
Peter H. Johansen
Keyword(s):  
Largemouth Bass ◽  
Micropterus Salmoides ◽  
Agonistic Behaviour ◽  
Laboratory Studies ◽  
Agonistic Interactions ◽  
Dominance Relations ◽  
Young Of The Year ◽  
Potential Interactions

Laboratory studies were carried out to investigate the influence of density on agonistic behaviour and dominance relations in juvenile largemouth bass (Micropterus salmoides). We report here that high densities result in fewer agonistic interactions and fewer as well as less stable dominance relations. Increased numbers of potential interactions may render the continued maintenance of dominance inefficients.

Mortality, Hematocrit, Osmolality, Electrolyte Regulation, and Fat Depletion of Young-of-the-Year Freshwater Fishes under Simulated Winter Conditions

1980 ◽  
Vol 37 (2) ◽  
pp. 225-232 ◽  
Author(s):  
Michael L. Toneys ◽  
Daniel W. Coble
Keyword(s):  
Largemouth Bass ◽  
Brook Trout ◽  
Yellow Perch ◽  
Micropterus Salmoides ◽  
Plasma Osmolality ◽  
Fat Content ◽  
Winter Conditions ◽  
All Solutions ◽  
Young Of The Year ◽  
Green Sunfish

In laboratory experiments young-of-the-year green sunfish, Lepomis cyanellus, largemouth bass, Micropterus salmoides, brook trout, Salvelinus fontinalis, and yellow perch, Perca flavescens, were held for 4 mo under simulated winter conditions (2–4 °C; photoperiod of 9 h light: 15 h dark) in solutions of various osmotic strengths, from 90% distilled water to 1.0% NaCl. Mortality in three of five experiments often was greater in salt solutions, indicating that NaCl did not increase survival. Survival was greater for larger yellow perch than smaller but was not related to size in the other species. Hematocrit was depressed below control levels in all solutions at the end of experiments. The fish generally were able to regulate plasma osmotic concentration in all solutions except the highest NaCl concentrations, where plasma osmolality was often significantly higher than in the control at the end of experiments. Plasma Na+ and Cl− typically decreased and then recovered at low temperatures. Presence of Na+ and Cl− in the external medium tended to alleviate their loss from plasma. Changes in plasma Na+ and Cl− were not related to mortality in hypoionic solutions but usually did correspond to changes in plasma osmolality. Fat content of survivors declined and water content increased for all species, but the losses and gains were not related to osmolality of solutions. Low fat content probably was not a cause of death.Key words: Mortality, electrolyte regulation, osmolality, hematocrit, fat depletion, winter conditions, green sunfish, largemouth bass, brook trout, yellow perch, sodium, chloride

scholarly journals Recruitment dynamics of non-native largemouth bass within the Sacramento-San Joaquin Delta

2020 ◽  
Author(s):  
Brock M. Huntsman ◽  
Frederick Feyrer ◽  
Matthew J. Young ◽  
James A. Hobbs ◽  
Shawn Acuña ◽  
...  
Keyword(s):  
Population Structure ◽  
Largemouth Bass ◽  
Aquatic Vegetation ◽  
Micropterus Salmoides ◽  
Habitat Characteristics ◽  
Fish Community Structure ◽  
Health Indices ◽  
Young Of The Year ◽  
Overwinter Mortality ◽  
Critical Developmental Period

Largemouth bass (Micropterus salmoides, LMB) recruitment is limited by a critical developmental period during early life-stages, but this mechanism may be less significant within non-native habitats. We conducted boat electrofishing surveys in four tidal lakes of California’s Sacramento-San Joaquin Delta (SSJD) from 2010-2011 to describe introduced LMB recruitment dynamics. We evaluated growth, proximate composition, and health indices of young-of-the-year (YOY) LMB among tidal lakes and developed an integrated count model to determine how factors known to affect LMB recruitment shape SSJD population structure. Our results show a mismatch between growth, nutrition, and YOY abundance, where the tidal lake with the most abundant and fastest growing LMB had the poorest nutritional status. The warm winter water temperatures and lack of a hatching-cohort growth advantage suggests overwinter starvation plays a less significant role in SSJD LMB recruitment than many native LMB habitats. Collectively, our results suggest that habitat characteristics (submerged aquatic vegetation) and not overwinter mortality shapes SSJD LMB population structure, a mechanism consistent with contemporary hypotheses about the altered fish community structure of the SSJD.

Stability of swimming performance and activity hierarchies among wild largemouth bass at multiple temporal scales: evidence for context-dependent shuffling between seasons

2010 ◽  
Vol 88 (3) ◽  
pp. 324-333 ◽  
Author(s):  
K. C. Hanson ◽  
C. T. Hasler ◽  
M. R. Donaldson ◽  
S. J. Cooke
Keyword(s):  
Largemouth Bass ◽  
Swimming Performance ◽  
Micropterus Salmoides ◽  
Teleost Fishes ◽  
Laboratory Studies ◽  
Four Seasons ◽  
Locomotory Performance ◽  
Stable Performance ◽  
The Individual ◽  
Individual Repeatability

Laboratory-based studies of locomotory performance in many taxa have noted that individuals form stable hierarchies of organismal performance. Though laboratory studies of teleost fishes have consistently demonstrated individual repeatability of swimming performance, this phenomenon has rarely been studied in the field and never across multiple years. Using a whole-lake acoustic telemetry array with submetre accuracy, we assessed the individual repeatability of two metrics of swimming performance (daily distance traveled and mean daily swimming speed) within four seasons during a year (fall, winter, spring, and summer), among these seasons, and between winters of 2 years. Largemouth bass ( Micropterus salmoides (Lacepède, 1802)) formed stable performance hierarchies within seasons except spring and no sex-specific differences in rankings were noted. Individual swimming performance was not repeatable among seasons during 1 year or across multiple winters. Seasonal changes in environmental and intrinsic biological conditions appear to result in a reshuffling of performance hierarchies, perhaps reflecting individual differences in organismal physiology.

Feeding habits and growth of young-of-the-year largemouth bass (Micropterus salmoides) near its northern limit, Nogies Creek, Ontario

1979 ◽  
Vol 57 (7) ◽  
pp. 1431-1437 ◽  
Author(s):  
James G. Hamilton ◽  
P. M. Powles
Keyword(s):  
Largemouth Bass ◽  
Average Length ◽  
Feeding Habits ◽  
Micropterus Salmoides ◽  
Condition Index ◽  
The United States ◽  
Northern Limit ◽  
Von Bertalanffy Model ◽  
Growth Increments ◽  
Young Of The Year

Two hundred and twenty-three young-of-the-year (YOY) largemouth bass (Micropterus salmoides) from Nogies Creek, Ontario, grew from 15 to 110 mm total length (TL) over June 1 to October 26, 1977. Growth was rapid through June and July but diminished after August 1. Growth increments formed a single stanza pattern closely fitting the von-Bertalanffy model, Lt = 85.8[1 − e−0.34(t−0.26)] and paralleling seasonal water temperatures.The summer condition index was lower for Nogies Creek YOY bass than populations reported from the United States. This was attributed in part to a shorter, cooler growing–feeding season, and some differences in diet.The most numerous food items were Cladocera. Amphipoda, Ephemeroptera, Chironomidae, and Teleostei, in order, were all of lesser importance. Cladocera, however, did not constitute as much total bulk in the diet as Ephemeroptera and Amphipoda. YOY bass selected the same variety, but larger prey, as they grew in size. Above average (length) YOY bass fed on larger food organisms than did their smaller cohorts for each month.

Pathogeny of disease characterized by swollen liver and spleen in largemouth bass (Micropterus salmoides)

2013 ◽  
Vol 18 (3) ◽  
pp. 654-659 ◽  
Author(s):  
Dongmei MA ◽  
Guocheng DEND ◽  
Junjie BAI ◽  
Shengjie LI ◽  
Xiaoyan JIANG ◽  
...  
Keyword(s):  
Largemouth Bass ◽  
Micropterus Salmoides
Sign in / Sign up

Export Citation Format

Share Document