A Histological Study of the Development of the Scales of the Largemouth Black Bass (Micropterus salmoides)

1953 ◽  
Vol s3-94 (25) ◽  
pp. 71-82
Author(s):  
MARY ALICE DIETRICH
Keyword(s):  
Micropterus Salmoides ◽  
Histological Study ◽  
Age Determination ◽  
Wide Band ◽  
Careful Study ◽  
Dark Line ◽  
Slowing Down ◽  
Dermal Bone ◽  
Black Bass ◽  
Fibroblastic Cells

1. The scale method of age determination in largemouth black bass, Micropterus salmoides, is valid at least up to and probably including the third year of the fish's life. A more careful study of older fish might reveal that it was valid beyond that point. 2. The annulus in a largemouth black bass is formed by a brief but gradual slowing down of growth and then its quick resumption. The annulus appears as a wide band on the anterior edge of the scale, and as a dark line (circulus) cutting across some inner dark lines (also circuli) on the lateral edges. 3. The scale is mesodermal in origin, and lies in a pocket surrounded by dermal tissue, which in turn is covered externally by a thin layer of epidermis. 4. The bony layer is formed by osteoblastic cells on its outer surface in a manner similar to the formation of dermal bone. Excess bony material is accumulated in ridges or circuli. 5. The fibrillary plate is formed by the fibroblastic cells on its inner surface.

scholarly journals Occurrence of parasites of the genus Eustrongylides spp. (Nematoda: Dioctophymatidae) in fish caught in Trasimeno lake, Italy

2016 ◽  
Vol 5 (4) ◽  
Author(s):  
Raffaella Branciari ◽  
David Ranucci ◽  
Dino Miraglia ◽  
Andrea Valiani ◽  
Fabrizia Veronesi ◽  
...  
Keyword(s):  
Cyprinus Carpio ◽  
Carassius Auratus ◽  
Micropterus Salmoides ◽  
Abdominal Cavity ◽  
Perca Fluviatilis ◽  
Tinca Tinca ◽  
European Perch ◽  
Black Bass ◽  
Zoonotic Parasites ◽  
Edible Fish

<em>Eustrongylides</em> spp. is considered a freshwater fish zoonotic nematode. In the present study, the prevalence of <em>Eustrongylides</em> spp. in six edible fish (European perch - <em>Perca fluviatilis</em>, goldfish - <em>Carassius auratus</em>, largemouth black bass - <em>Micropterus salmoides</em>, tench- <em>Tinca tinca</em>, carp - <em>Cyprinus carpio</em> and sand smelt - Atherina boyeri) of Trasimeno lake was surveyed. The investigations were conducted from October 2014 to September 2015 and 384 specimens per species for each season were caught in Trasimeno lake and examined for the presence of larvae in the abdominal cavity and muscle. The presence of nematodes in the abdominal cavity and musculature was revealed in three fish species. The prevalence of Eustrongylides spp. infection was 6.84, 1.89 and 0.13% in perch, largemouth black bass and sand smelt, respectively. The number of parasites per fish was only one in largemouth black bass and sand smelt and ranged from one up to three in perch. This study states that the European perch, largemouth black bass and sand smelt of Trasimeno lake are infected with zoonotic parasites; therefore, food business operators have to take appropriate measures to guarantee the health of consumers.

scholarly journals Growth and mortality of black bass, Micropterus salmoides (Pisces, Centrachidae; Lacapède, 1802) in a reservoir in southern Brazil

2005 ◽  
Vol 65 (2) ◽  
pp. 363-369 ◽  
Author(s):  
U. H. Schulz ◽  
M. E. Leal
Keyword(s):  
Micropterus Salmoides ◽  
Scientific Information ◽  
Fish Fauna ◽  
Fish Diversity ◽  
First Year ◽  
Southern Brazil ◽  
Small Reservoir ◽  
Long Time ◽  
Black Bass ◽  
Aquaculture Facilities

The black bass, Micropterus salmoides, was introduced to Brazil from North America in 1922. Since then the species has been reared in aquaculture facilities intended to stock reservoirs as additions to native stocks available for angling. At present no scientific information on the biology of black bass in Brazilian waters is available. Since black bass dispersion may cause severe impacts on native Brazilian fish fauna, information on the basic biological parameters of this species is necessary. The objective of the present study is to provide information on the growth, age structure, and mortality of the species in a small reservoir in southern Brazil, where the species reproduces regularly. Based on scale readings, the von Bertalanffy growth curve was calculated and compared to the length-frequency distribution of the population. Both methods showed similar results. Maximum length was about 44 cm. The mean length at the end of the first year was 23.1 cm (s.d. = 13.88); at that of the second, 37.3 cm (s.d. = 12.52); and 41.4 cm (s.d. = 9.92) at the third. Oldest fish were three years old. The growth performance index ø' was 3.28 cm year-1. Mortality increased from 0.16 year-1 between the first and the second cohort, to 0.8 year-1 between the second and third. The results show that black bass in Brazil grows faster than in its area of origin, but longevity is shorter and body shape, stouter. The cause of high mortality at a relatively early age may be connected with the loss of genetic diversity due to inbreeding of the Brazilian stocks, which originated from few introduced individuals a long time ago. The fact that black bass reproduces in reservoirs and grows rapidly may be considered a threat to conserving fish diversity in Brazilian ecosystems.

Black Bass Diversity: Multidisciplinary Science for Conservation

2015 ◽  
Keyword(s):  
Mixed Model ◽  
Micropterus Salmoides ◽  
Underlying Mechanism ◽  
Treated Wastewater ◽  
Fish Length ◽  
Catch Per Unit Effort ◽  
Explanatory Factors ◽  
Black Bass ◽  
Intersex Condition ◽  
Catch Rates

<em>Abstract</em>.—Reports of testicular oocytes (intersex) in fish are increasing worldwide. Intersex is often associated with estrogens in treated wastewater effluents, but few studies have explored other potentially explanatory factors. Our recent survey of intersex Largemouth Bass <em>Micropterus salmoides</em> in 11 impoundments across Georgia, USA found high incidence (>80%) of intersex fish in some impoundments but none in others. To explore factors associated with intersex in the impoundments, which did not receive wastewater, we examined potential predictor variables that varied among the levels of individual fish, impoundment, or landscape in a binomial mixed-model regression approach. Our model indicated effects of fish length, catch per unit effort (an index of fish density), and impoundment, which was the strongest effect. The probability of intersex was highest in smaller fish from impoundments with the highest catch rates. The underlying mechanism(s) for the impoundment effect remain unclear, but we hypothesize that estrogens excreted by high densities of fish and cyanobacteria may influence intersex. Additional studies are needed to understand the long-term population implications of intersex and the role of other biological and environmental factors, particularly at the impoundment level, in development of the intersex condition.

scholarly journals Retenção de proteína e energia em juvenis de "black bass" Micropterus salmoides

2000 ◽  
Vol 57 (4) ◽  
pp. 609-616 ◽  
Author(s):  
José Eurico Possebon Cyrino ◽  
Leandro Portz ◽  
Ricardo Cavalcanti Martino
Keyword(s):  
Micropterus Salmoides ◽  
Black Bass

O objetivo deste trabalho foi avaliar alterações nas formas de reserva de energia na carcaça de juvenis de "black bass" (14,46 ± 0,81 g de peso vivo). Peixes condicionados a aceitar alimento artificial foram estocados em 90 gaiolas de volume 60 L alojadas em caixas de 1.000 L em laboratório com condições ambientais controladas, e alimentados por 64 dias com rações extrusadas com níveis de proteína variando entre 34 e 54% (incrementos de 4%) e teores de energia digestível variando de 3.600 a 4.100 kcal kg-1 de alimento (incrementos de 125 kcal kg-1). Foram analisados as variáveis de ganho de peso, consumo alimentar diário, relação hepato-somática, relação víscero-somática, deposição protéica e energética, glicogênio tecidual hepático e lipídio visceral. Não houve interação (P > 0,05) entre níveis de proteína e energia para os parâmetros avaliados. Os níveis de proteína e energia digestível dietética que garantiram melhor desempenho foram 42% e 3.850 kcal kg-1, respectivamente. Dietas com teores médios de 42% de proteína bruta, induziram um alto acúmulo de glicogênio hepático (P < 0,0442), assim como aumento da relação hepato-somática (P < 0,0001), mostrando alta eficiência no acúmulo de energia prontamente utilizável bem como melhor capacidade de retenção dos nutrientes, quando os níveis de carboidratos foram inferiores a 30% na ração. O aumento dos níveis de energia das dietas, através da inclusão de óleo nas rações, induziu aumentos significativos no acúmulo total de lipídios na carcaça quando as médias eram agrupadas por níveis de energia, e induziu acúmulo de lipídios nas vísceras para os agrupamentos de médias tanto por teor de proteína (P < 0,0001) como de energia dietética (P < 0,0021).

scholarly journals Fish silage in black bass (Micropterus Salmoides) feed as an alternative to fish meal

2009 ◽  
Vol 52 (5) ◽  
pp. 1261-1266 ◽  
Author(s):  
Lia Ferraz de Arruda ◽  
Ricardo Borghesi ◽  
Leandro Portz ◽  
José Eurico Possebon Cyrino ◽  
Marília Oetterer
Keyword(s):  
Crude Protein ◽  
Fish Meal ◽  
Micropterus Salmoides ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Partial Substitution ◽  
Fish Feed ◽  
Feed Conversion ◽  
Initial Weight ◽  
Black Bass

The objective of this study was to use the residues of fermented sardine to elaborate the acid fish silage and its use in feed for aquaculture. Biological assay was performed by feeding largemouth bass (Micropterus salmoides) fingerlings (initial weight 22g), with extruded diets (41% crude protein; 3,600 kcal/kg digestible energy) containing 0.0, 7.5, 10.0, 12.5, or 15.0% of fish silage in partial substitution to the fish meal. The feed conversion ratio and weight gain for the treatments were: 1.26 and 15.76g; 1.11 and 17.07g; 1.19 and 17.81g; 1.18 and 19.83g; 1.47 and 14.64g, respectively. No significant differences (P<0.05) were detected among the treatments. Results indicated that it was possible to use up to 15% of acid fish silage as partial substitute for fish meal in the formulation of carnivorous fish feed.

scholarly journals Osteology of the large-mouthed black bass (Micropterus salmoides)

Science ◽  
1884 ◽  
Vol ns-3 (65) ◽  
pp. 532-532
Author(s):  
R. W. SHUFELDT
Keyword(s):  
Micropterus Salmoides ◽  
Black Bass
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